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Sample records for bee venom phospholipase

  1. Bee Venom Phospholipase A2: Yesterday's Enemy Becomes Today's Friend.

    Science.gov (United States)

    Lee, Gihyun; Bae, Hyunsu

    2016-02-01

    Bee venom therapy has been used to treat immune-related diseases such as arthritis for a long time. Recently, it has revealed that group III secretory phospholipase A2 from bee venom (bee venom group III sPLA2) has in vitro and in vivo immunomodulatory effects. A growing number of reports have demonstrated the therapeutic effects of bee venom group III sPLA2. Notably, new experimental data have shown protective immune responses of bee venom group III sPLA2 against a wide range of diseases including asthma, Parkinson's disease, and drug-induced organ inflammation. It is critical to evaluate the beneficial and adverse effects of bee venom group III sPLA2 because this enzyme is known to be the major allergen of bee venom that can cause anaphylactic shock. For many decades, efforts have been made to avoid its adverse effects. At high concentrations, exposure to bee venom group III sPLA2 can result in damage to cellular membranes and necrotic cell death. In this review, we summarized the current knowledge about the therapeutic effects of bee venom group III sPLA2 on several immunological diseases and described the detailed mechanisms of bee venom group III sPLA2 in regulating various immune responses and physiopathological changes. PMID:26907347

  2. Bee Venom Phospholipase A2: Yesterday’s Enemy Becomes Today’s Friend

    OpenAIRE

    Gihyun Lee; Hyunsu Bae

    2016-01-01

    Bee venom therapy has been used to treat immune-related diseases such as arthritis for a long time. Recently, it has revealed that group III secretory phospholipase A2 from bee venom (bee venom group III sPLA2) has in vitro and in vivo immunomodulatory effects. A growing number of reports have demonstrated the therapeutic effects of bee venom group III sPLA2. Notably, new experimental data have shown protective immune responses of bee venom group III sPLA2 against a wide range of diseases inc...

  3. Gangliosides inhibit bee venom melittin cytotoxicity but not phospholipase A2-induced degranulation in mast cells

    International Nuclear Information System (INIS)

    Sting accident by honeybee causes severe pain, inflammation and allergic reaction through IgE-mediated anaphylaxis. In addition to this hypersensitivity, an anaphylactoid reaction occurs by toxic effects even in a non-allergic person via cytolysis followed by similar clinical manifestations. Auto-injectable epinephrine might be effective for bee stings, but cannot inhibit mast cell lysis and degranulation by venom toxins. We used connective tissue type canine mast cell line (CM-MC) for finding an effective measure that might inhibit bee venom toxicity. We evaluated degranulation and cytotoxicity by measurement of β-hexosaminidase release and MTT assay. Melittin and crude bee venom induced the degranulation and cytotoxicity, which were strongly inhibited by mono-sialoganglioside (GM1), di-sialoganglioside (GD1a) and tri-sialoganglioside (GT1b). In contrast, honeybee venom-derived phospholipase A2 induced the net degranulation directly without cytotoxicity, which was not inhibited by GM1, GD1a and GT1b. For analysis of distribution of Gαq and Gαi protein by western blotting, lipid rafts were isolated by using discontinuous sucrose gradient centrifuge. Melittin disrupted the localization of Gαq and Gαi at lipid raft, but gangliosides stabilized the rafts. As a result from this cell-based study, bee venom-induced anaphylactoid reaction can be explained with melittin cytotoxicity and phospholipase A2-induced degranulation. Taken together, gangliosides inhibit the effect of melittin such as degranulation, cytotoxicity and lipid raft disruption but not phospholipase A2-induced degranulation in mast cells. Our study shows a potential of gangliosides as a therapeutic tool for anaphylactoid reaction by honeybee sting.

  4. Bee venom phospholipase A2 induces a primary type 2 response that is dependent on the receptor ST2 and confers protective immunity

    OpenAIRE

    Palm, Noah W.; Rosenstein, Rachel K; Yu, Shuang; Schenten, Dominik; Florsheim, Esther; Medzhitov, Ruslan

    2013-01-01

    Venoms consist of toxic components that are delivered to their victims via bites or stings. Venoms also represent a major class of allergens in humans. Phospholipase A2 (PLA2) is a conserved component of venoms from multiple species and is the major allergen in bee venom. Here we examined how bee venom PLA2 is sensed by the innate immune system and induces a type 2 immune response in mice. We found that bee venom PLA2 induced a T helper type 2 (Th2) cell-type response and group 2 innate lymph...

  5. Preventive Effects of Bee Venom Derived Phospholipase A2 on Oxaliplatin-Induced Neuropathic Pain in Mice

    OpenAIRE

    Dongxing Li; Woojin Kim; Dasom Shin; Yongjae Jung; Hyunsu Bae; Sun Kwang Kim

    2016-01-01

    Oxaliplatin, a chemotherapy drug used to treat colorectal cancer, induces specific sensory neurotoxicity signs that are aggravated by cold and mechanical stimuli. Here we examined the preventive effects of Bee Venom (BV) derived phospholipase A2 (bvPLA2) on oxaliplatin-induced neuropathic pain in mice and its immunological mechanism. The cold and mechanical allodynia signs were evaluated by acetone and von Frey hair test on the hind paw, respectively. The most significant allodynia signs were...

  6. Bee venom phospholipase A2 suppresses allergic airway inflammation in an ovalbumin‐induced asthma model through the induction of regulatory T cells

    OpenAIRE

    Park, Soojin; Baek, Hyunjung; Jung, Kyung‐Hwa; Lee, Gihyun; Lee, Hyeonhoon; Kang, Geun‐Hyung; Lee, Gyeseok; Bae, Hyunsu

    2015-01-01

    Abstract Bee venom (BV) is one of the alternative medicines that have been widely used in the treatment of chronic inflammatory diseases. We previously demonstrated that BV induces immune tolerance by increasing the population of regulatory T cells (Tregs) in immune disorders. However, the major component and how it regulates the immune response have not been elucidated. We investigated whether bee venom phospholipase A2 (bvPLA2) exerts protective effects that are mediated via Tregs in OVA‐in...

  7. Preventive Effects of Bee Venom Derived Phospholipase A₂ on Oxaliplatin-Induced Neuropathic Pain in Mice.

    Science.gov (United States)

    Li, Dongxing; Kim, Woojin; Shin, Dasom; Jung, Yongjae; Bae, Hyunsu; Kim, Sun Kwang

    2016-01-01

    Oxaliplatin, a chemotherapy drug used to treat colorectal cancer, induces specific sensory neurotoxicity signs that are aggravated by cold and mechanical stimuli. Here we examined the preventive effects of Bee Venom (BV) derived phospholipase A₂ (bvPLA₂) on oxaliplatin-induced neuropathic pain in mice and its immunological mechanism. The cold and mechanical allodynia signs were evaluated by acetone and von Frey hair test on the hind paw, respectively. The most significant allodynia signs were observed at three days after an injection of oxaliplatin (6 mg/kg, i.p.) and then decreased gradually to a normal level on days 7-9. The oxaliplatin injection also induced infiltration of macrophages and upregulated levels of the pro-inflammatory cytokine interleukin (IL)-1β in the lumbar dorsal root ganglia (DRG). Daily treatment with bvPLA₂ (0.2 mg/kg, i.p.) for five consecutive days prior to the oxaliplatin injection markedly inhibited the development of cold and mechanical allodynia, and suppressed infiltration of macrophages and the increase of IL-1β level in the DRG. Such preventive effects of bvPLA₂ were completely blocked by depleting regulatory T cells (Tregs) with CD25 antibody pre-treatments. These results suggest that bvPLA₂ may prevent oxaliplatin-induced neuropathic pain by suppressing immune responses in the DRG by Tregs. PMID:26797636

  8. Bee venom phospholipase A2 as a membrane-binding vector for cell surface display or internalization of soluble proteins.

    Science.gov (United States)

    Babon, Aurélie; Wurceldorf, Thibault; Almunia, Christine; Pichard, Sylvain; Chenal, Alexandre; Buhot, Cécile; Beaumelle, Bruno; Gillet, Daniel

    2016-06-15

    We showed that bee venom phospholipase A2 can be used as a membrane-binding vector to anchor to the surface of cells a soluble protein fused to its C-terminus. ZZ, a two-domain derivative of staphylococcal protein A capable of binding constant regions of antibodies was fused to the C-terminus of the phospholipase or to a mutant devoid of enzymatic activity. The fusion proteins bound to the surface of cells and could themselves bind IgGs. Their fate depended on the cell type to which they bound. On the A431 carcinoma cell line the proteins remained exposed on the cell surface. In contrast, on human dendritic cells the proteins were internalized into early endosomes. PMID:26253725

  9. Regulatory T Cells Contribute to the Inhibition of Radiation-Induced Acute Lung Inflammation via Bee Venom Phospholipase A2 in Mice

    OpenAIRE

    Dasom Shin; Gihyun Lee; Sung-Hwa Sohn; Soojin Park; Kyung-Hwa Jung; Ji Min Lee; Jieun Yang; Jaeho Cho; Hyunsu Bae

    2016-01-01

    Bee venom has long been used to treat various inflammatory diseases, such as rheumatoid arthritis and multiple sclerosis. Previously, we reported that bee venom phospholipase A2 (bvPLA2) has an anti-inflammatory effect through the induction of regulatory T cells. Radiotherapy is a common anti-cancer method, but often causes adverse effects, such as inflammation. This study was conducted to evaluate the protective effects of bvPLA2 in radiation-induced acute lung inflammation. Mice were focall...

  10. Bee venom phospholipase A2 induces a primary type 2 response that is dependent on the receptor ST2 and confers protective immunity.

    Science.gov (United States)

    Palm, Noah W; Rosenstein, Rachel K; Yu, Shuang; Schenten, Dominik D; Florsheim, Esther; Medzhitov, Ruslan

    2013-11-14

    Venoms consist of toxic components that are delivered to their victims via bites or stings. Venoms also represent a major class of allergens in humans. Phospholipase A2 (PLA2) is a conserved component of venoms from multiple species and is the major allergen in bee venom. Here we examined how bee venom PLA2 is sensed by the innate immune system and induces a type 2 immune response in mice. We found that bee venom PLA2 induced a T helper type 2 (Th2) cell-type response and group 2 innate lymphoid cell activation via the enzymatic cleavage of membrane phospholipids and release of interleukin-33. Furthermore, we showed that the IgE response to PLA2 could protect mice from future challenge with a near-lethal dose of PLA2. These data suggest that the innate immune system can detect the activity of a conserved component of venoms and induce a protective immune response against a venom toxin. PMID:24210353

  11. Bee venom phospholipase A2 ameliorates motor dysfunction and modulates microglia activation in Parkinson's disease alpha-synuclein transgenic mice.

    Science.gov (United States)

    Ye, Minsook; Chung, Hwan-Suck; Lee, Chanju; Hyun Song, Joo; Shim, Insop; Kim, Youn-Sub; Bae, Hyunsu

    2016-01-01

    α-Synuclein (α-Syn) has a critical role in microglia-mediated neuroinflammation, which leads to the development of Parkinson's disease (PD). Recent studies have shown that bee venom (BV) has beneficial effects on PD symptoms in human patients or 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) toxin-induced PD mice. This study investigated whether treatment with BV-derived phospholipase A2 (bvPLA2) would improve the motor dysfunction and pathological features of PD in human A53T α-Syn mutant transgenic (A53T Tg) mice. The motor dysfunction of A53T Tg mice was assessed using the pole test. The levels of α-Syn, microglia and the M1/M2 phenotype in the spinal cord were evaluated by immunofluorescence. bvPLA2 treatment significantly ameliorated motor dysfunction in A53T Tg mice. In addition, bvPLA2 significantly reduced the expression of α-Syn, the activation and numbers of microglia, and the ratio of M1/M2 in A53T Tg mice. These results suggest that bvPLA2 could be a promising treatment option for PD. PMID:27388550

  12. Neuroprotective effects of bee venom phospholipase A2 in the 3xTg AD mouse model of Alzheimer’s disease

    OpenAIRE

    Ye, Minsook; Chung, Hwan-Suck; Lee, Chanju; Yoon, Moon Sik; Yu, A. Ram; Kim, Jin Su; Hwang, Deok-Sang; Shim, Insop; Bae, Hyunsu

    2016-01-01

    Background Alzheimer’s disease (AD) is a severe neuroinflammatory disease. CD4+Foxp3+ regulatory T cells (Tregs) modulate various inflammatory diseases via suppressing Th cell activation. There are increasing evidences that Tregs have beneficial roles in neurodegenerative diseases. Previously, we found the population of Treg cells was significantly increased by bee venom phospholipase A2 (bvPLA2) treatment in vivo and in vitro. Methods To examine the effects of bvPLA2 on AD, bvPLA2 was admini...

  13. EXPRESSION OF A BEE-VENOM PHOSPHOLIPASE A2 FROM APIS CERANA CERANA IN E,.qCHERICHIA COLI

    Institute of Scientific and Technical Information of China (English)

    Li-rongShen; Jia-anCheng; Chuan-xiZhang

    2004-01-01

    The venomous phospholipase A2 (AcPLA2) coding reading region of the Chinese honeybee (Apis cerana cerana), which is composed of 405 bp encoding a mature glycosylated peptide with 134 amino residues was transformed into the expression vector pETblue-1. Then the recombinant vector was introduced into Escherichia coli Tuner (DE3) plac I for expression. Analysis result of SDS-PAGE showed that the expression products had a protein band of about 15 kD. Detection of western blot using ant-European honeybee (Apis mellifera) phospholipase A2 (AmPLA2) polyclonal serum as the first antibody showed that the expression products appeared a special blot same as the native AmPLA2.The result demonstrated that the AcPLA2 peptide had been expressed in E. coli and the AcPLA2 has the similar antigenicity as the AmPLA2.

  14. Regulatory T Cells Contribute to the Inhibition of Radiation-Induced Acute Lung Inflammation via Bee Venom Phospholipase A₂ in Mice.

    Science.gov (United States)

    Shin, Dasom; Lee, Gihyun; Sohn, Sung-Hwa; Park, Soojin; Jung, Kyung-Hwa; Lee, Ji Min; Yang, Jieun; Cho, Jaeho; Bae, Hyunsu

    2016-01-01

    Bee venom has long been used to treat various inflammatory diseases, such as rheumatoid arthritis and multiple sclerosis. Previously, we reported that bee venom phospholipase A₂ (bvPLA₂) has an anti-inflammatory effect through the induction of regulatory T cells. Radiotherapy is a common anti-cancer method, but often causes adverse effects, such as inflammation. This study was conducted to evaluate the protective effects of bvPLA₂ in radiation-induced acute lung inflammation. Mice were focally irradiated with 75 Gy of X-rays in the lung and administered bvPLA₂ six times after radiation. To evaluate the level of inflammation, the number of immune cells, mRNA level of inflammatory cytokine, and histological changes in the lung were measured. BvPLA₂ treatment reduced the accumulation of immune cells, such as macrophages, neutrophils, lymphocytes, and eosinophils. In addition, bvPLA₂ treatment decreased inflammasome-, chemokine-, cytokine- and fibrosis-related genes' mRNA expression. The histological results also demonstrated the attenuating effect of bvPLA₂ on radiation-induced lung inflammation. Furthermore, regulatory T cell depletion abolished the therapeutic effects of bvPLA₂ in radiation-induced pneumonitis, implicating the anti-inflammatory effects of bvPLA₂ are dependent upon regulatory T cells. These results support the therapeutic potential of bvPLA₂ in radiation pneumonitis and fibrosis treatments. PMID:27144583

  15. Antimicrobial activity of apitoxin, melittin and phospholipase A₂ of honey bee (Apis mellifera) venom against oral pathogens.

    Science.gov (United States)

    Leandro, Luís F; Mendes, Carlos A; Casemiro, Luciana A; Vinholis, Adriana H C; Cunha, Wilson R; de Almeida, Rosana; Martins, Carlos H G

    2015-03-01

    In this work, we used the Minimum Inhibitory Concentration (MIC) technique to evaluate the antibacterial potential of the apitoxin produced by Apis mellifera bees against the causative agents of tooth decay. Apitoxin was assayed in natura and in the commercially available form. The antibacterial actions of the main components of this apitoxin, phospholipase A2, and melittin were also assessed, alone and in combination. The following bacteria were tested: Streptococcus salivarius, S. sobrinus, S. mutans, S. mitis, S. sanguinis, Lactobacillus casei, and Enterococcus faecalis. The MIC results obtained for the commercially available apitoxin and for the apitoxin in natura were close and lay between 20 and 40 µg / mL, which indicated good antibacterial activity. Melittin was the most active component in apitoxin; it displayed very promising MIC values, from 4 to 40 µg / mL. Phospholipase A2 presented MIC values higher than 400 µg / mL. Association of mellitin with phospholipase A2 yielded MIC values ranging between 6 and 80 µg / mL. Considering that tooth decay affects people's health, apitoxin and its component melittin have potential application against oral pathogens. PMID:25806982

  16. Bee venom phospholipase A2 suppresses allergic airway inflammation in an ovalbumin-induced asthma model through the induction of regulatory T cells.

    Science.gov (United States)

    Park, Soojin; Baek, Hyunjung; Jung, Kyung-Hwa; Lee, Gihyun; Lee, Hyeonhoon; Kang, Geun-Hyung; Lee, Gyeseok; Bae, Hyunsu

    2015-12-01

    Bee venom (BV) is one of the alternative medicines that have been widely used in the treatment of chronic inflammatory diseases. We previously demonstrated that BV induces immune tolerance by increasing the population of regulatory T cells (Tregs) in immune disorders. However, the major component and how it regulates the immune response have not been elucidated. We investigated whether bee venom phospholipase A2 (bvPLA2) exerts protective effects that are mediated via Tregs in OVA-induced asthma model. bvPLA2 was administered by intraperitoneal injection into control and OVA-challenged mice. The Treg population, total and differential bronchoalveolar lavage fluid (BALF) cell count, Th2 cytokines, and lung histological features were assessed. Treg depletion was used to determine the involvement of Treg migration and the reduction of asthmatic symptoms. The CD206-dependence of bvPLA2-treated suppression of airway inflammation was evaluated in OVA-challenged CD206(-/-) mice. The bvPLA2 treatment induced the Tregs and reduced the infiltration of inflammatory cells into the lung in the OVA-challenged mice. Th2 cytokines in the bronchoalveolar lavage fluid (BALF) were reduced in bvPLA2-treated mice. Although bvPLA2 suppressed the number of inflammatory cells after OVA challenge, these effects were not observed in Treg-depleted mice. In addition, we investigated the involvement of CD206 in bvPLA2-mediated immune tolerance in OVA-induced asthma model. We observed a significant reduction in the levels of Th2 cytokines and inflammatory cells in the BALF of bvPLA2-treated OVA-induced mice but not in bvPLA2-treated OVA-induced CD206(-/-) mice. These results demonstrated that bvPLA2 can mitigate airway inflammation by the induction of Tregs in an OVA-induced asthma model. PMID:26734460

  17. A Study on Major Components of Bee Venom Using Electrophoresis

    Directory of Open Access Journals (Sweden)

    Lee, Jin-Seon

    2000-12-01

    Full Text Available This study was designed to study on major components of various Bee Venom(Bee Venom by electrical stimulation in Korea; K-BV I, Bee Venom by Microwave stimulation in Korea; K -BV II, 0.5rng/ml, Fu Yu Pharmaceutical Factory, China; C-BV, 1mg /ml, Monmouth Pain Institute, Inc., U.S.A.; A-BV using Electrophoresis. The results were summarized as follows: 1. In 1:4000 Bee Venom solution rate, the band was not displayed distinctly usmg Electrophoresis. But in 1: 1000, the band showed clearly. 2. The results of Electrophoresis at solution rate 1:1000, K-BV I and K-BVII showed similar band. 3. The molecular weight of Phospholipase A2 was known as 19,000 but its band was seen at 17,000 in Electrophoresis. 4. Protein concentration of Bee Venom by Lowry method was different at solution rate 1:4000 ; C-BV was 250μg/ml, K-BV I was 190μg/ml, K-BV Ⅱ was 160μg/ml and C-BV was 45μg/ml. 5. Electrophoresis method was unuseful for analysis of Bee Venom when solution rate is above 1:4000 but Protein concentration of Bee Venom by Lowry method was possible. These data from the study can be applied to establish the standard measurement of Bee Venom and prevent pure bee venom from mixing of another components. I think it is desirable to study more about safety of Bee Venom as time goes by.

  18. 蜂毒过敏原磷脂酶A2%Research on Phospholipase A2, the Allergen in Bee Venom

    Institute of Scientific and Technical Information of China (English)

    李英华; 胡福良; 刘艳荷

    2001-01-01

    @@ 蜂毒(bee venom)是由工蜂毒腺和副腺分泌的、具有芳香气味的一种透明液体,贮藏在毒囊中,在蜜蜂蛰刺时由蛰针排出[1].蜂毒具有抗菌、消炎、镇痛、降血压、抗辐射、预防癌症等药理作用,可用于治疗风湿性关节炎、类风湿性关节炎、哮喘、神经痛等多种疑难杂症.目前世界上许多国家都已开展蜂针疗法,并有各种类型的蜂毒软膏和针剂生产.但由于蜂毒易使人产生过敏反应,致使蜂针疗法不能得到广泛推广.鉴于这一点,国内外许多学者对主要引起人类过敏的蜂毒组分--磷脂酶A2(phospholipase A2)进行了研究,并且取得了一定进展.

  19. The Effects of Bee Venom on PLA2 and Calcium Concentration in Raw 264.7 Cells

    Directory of Open Access Journals (Sweden)

    Jong-Il Yun

    2003-06-01

    Full Text Available Objectives : The purpose of this study was to investigate the effect of Bee Venom on the lipopolysaccharide, sodium nitroprusside and hydrogen peroxide induced expression phospholipase A2 and calcium concentration in RAW 264.7 cells, a murine macrophage cell line. Methods : The expression of phospholipase A2 was determined by western blotting with corresponding antibodies, and the generation of intracellular calcium concentration was investigated by delta scan system in RAW 264.7 cells. Results : 1. Compared with control, expressions of lipopolysaccharide-induced phospholipase A2 were decreased significantly by 1 ㎍/㎕ of bee venom and decreased by 0.5, 5 ㎍/㎕ of bee venom. 2. Compared with control, expressions of sodium nitroprusside-induced phospholipase A2 were decreased significantly by 5 ㎍/㎕ of bee venom but increased by 0.5, 5 ㎍/㎕ of bee venom. 3. Compared with control, expressions of hydrogen peroxide-induced phospholipase A2 were decreased significaltly by 1 ㎍/㎕ of bee venom and decreased by 0.5 ㎍/㎕ of bee venom but increased by 5 ㎍/㎕ of bee venom. 4. Compared with control, lipopolysaccharide, sodium nitroprusside and hydrogen peroxide- induced intracellular calcium concentrations were decreased by 0.5, 1, 5 ㎍/㎕ of bee venom and by indomethacin

  20. An Experimental Study on Production of Egg Yolk Antibody(IgY) against Bee Venom

    OpenAIRE

    Hwang, Tae-Jun; Lee, Seung-bae; Gwon, Gi-Rok

    2001-01-01

    This study was carried out for production of neutral antibody to bee venom(anti-phospholipase A2 IgY). Hen layings were injected repeatedly with bee venom and phospholipase A2 with Freund's adjuvant. Specific antibody in egg yolk from immunized hen laying was separated, and purified, also immunological characteristics of anti-phospholipase A2 IgY was invested. The results were summarized as follows : 1. Phospholipase A2 was showed single band at molecular weight 17,000 in SDS-PAGE and b...

  1. Honey Bee Venom (Apis mellifera) Contains Anticoagulation Factors and Increases the Blood-clotting Time

    OpenAIRE

    Hossein Zolfagharian; Mohammad Mohajeri; Mahdi Babaie

    2015-01-01

    Objectives: Bee venom (BV) is a complex mixture of proteins and contains proteins such as phospholipase and melittin, which have an effect on blood clotting and blood clots. The mechanism of action of honey bee venom (HBV, Apis mellifera) on human plasma proteins and its anti-thrombotic effect were studied. The purpose of this study was to investigate the anti-coagulation effect of BV and its effects on blood coagulation and purification. Methods: Crude venom obtained from Apis mellifera was ...

  2. Activities of Venom Proteins and Peptides with Possible Therapeutic Applications from Bees and WASPS.

    Science.gov (United States)

    Ye, Xiujuan; Guan, Suzhen; Liu, Jiwen; Ng, Charlene C W; Chan, Gabriel H H; Sze, Stephen C W; Zhang, Kalin Y; Naude, Ryno; Rolka, Krzysztof; Wong, Jack Ho; Ng, Tzi Bun

    2016-01-01

    The variety of proteins and peptides isolated from honey bee venom and wasp venom includes melittin, adiapin, apamine, bradykinin, cardiopep, mast cell degranulating peptide, mastoparan, phospholipase A2 and secapin. Some of the activities they demonstrate may find therapeutic applications. PMID:27323949

  3. Expermental Studies of quantitative evaluation using HPLC and safety of Sweet Bee Venom

    Directory of Open Access Journals (Sweden)

    Ki Rok Kwon

    2007-06-01

    Full Text Available Objectives : This study was conducted to carry out quantitative evaluation and safety of Sweet Bee Venom. Methods : Content analysis was done using HPLC, measurement of LD50 was conducted intravenous, subcutaneous, and intra-muscular injection to the ICR mice. Results : 1. According to HPLC analysis, removal of the enzymes containing phospholipase A2 was successfully rendered on Sweet Bee Venom. And analyzing melittin content, Sweet Bee Venom contained 12% more melittin than Bee Venom. 2. LD50 of ICR mice with Sweet Bee Venom was more than 20mg/kg in subcutaneous injection and intravenous injection, between 15mg/kg and 20mg/kg in muscular injection. 3. LD50 of ICR mice with Bee Venom was between 6 and 9mg/kg in subcutaneous injection and intravenous injection, and more than 9mg/kg in muscular injection. Conclusion : Above results indicate that Sweet Bee Venom was more safe than Bee Venom and the process of removing enzymes was well rendered in Sweet Bee Venom.

  4. Antineoplastic Effects of Honey Bee Venom

    Directory of Open Access Journals (Sweden)

    Mohammad Nabiuni

    2013-08-01

    Full Text Available Background: Bee venom (BV, like many other complementary medicines, has been used for thousands of years for the treatment of a range of diseases. More recently, BV is also being considered as an effective composition for the treatment of cancer. Cancer is a major worldwide problem. It is obvious that the identification of compounds that can activate apoptosis could be effective on the treatment of cancer. BV is a very complicated mixture of active peptides, enzymes, and biologically active amines. The two main components of BV are melittin and phospholipase A2 (PLA2. Of these two components, melittin, the major active ingredient of BV, has been identified to induce apoptosis and to possess anti-tumor effects. We tried to review antineoplastic effects of BV in this study. Materials and Methods: The related articles were derived from different data bases such as PubMed, Elsevier Science, and Google Scholar using keywords including bee venom, cancer, and apoptosis.Results: According to the results of this study, BV can induce apoptosis and inhibit tumor cell growth and metastasis. Results of in vivo experiments show that the anti-tumor effect of the BV is highly dependent on the manner of injection as well as the distance between the area of injection and the tumor cells.Conclusion: The results obtained from the reported studies revealed that BV has anti-cancer effects and can be used as an effective chemotherapeutic agent against tumors in the future.

  5. Pharmacological evaluation of bee venom and melittin

    Directory of Open Access Journals (Sweden)

    Camila G. Dantas

    2014-01-01

    Full Text Available The objective of this study was to identify the pharmacological effects of bee venom and its major component, melittin, on the nervous system of mice. For the pharmacological analysis, mice were treated once with saline, 0.1 or 1.2 mg/kg of bee venom and 0.1 mg/kg of melittin, subcutaneously, 30 min before being submitted to behavioral tests: locomotor activity and grooming (open-field, catalepsy, anxiety (elevated plus-maze, depression (forced swimming test and apomorphine-induced stereotypy. Haloperidol, imipramine and diazepam were administered alone (positive control or as a pre-treatment (haloperidol.The bee venom reduced motor activity and promoted cataleptic effect, in a similar manner to haloperidol.These effects were decreased by the pretreatment with haloperidol. Both melittin and bee venom decreased the apomorphine-induced stereotypies. The data indicated the antipsychotic activity of bee venom and melittin in a murine model.

  6. The effects of Bee Venom and Sweet Bee Venom to the preadipocyte proliferation and lipolysis of adipocyte, localized fat accumulation

    Directory of Open Access Journals (Sweden)

    Min-Ki Kim

    2007-12-01

    Full Text Available Objectives : The purpose of this study was to investigate the effects of Bee Venom and Sweet Bee Venom to the primary cultured preadipocyte, adipocytes, and localized fat tissue. Methods : Decreased preadipocyte proliferation and decreased lipogenesis are mechanisms to reduce obesity. So, preadipocytes and adipocytes were performed on cell cultures using Sprague-Dawley Rats and treated with 0.01-1mg/㎖ Bee Venom and Sweet Bee Venom. And porcine skin including fat tissue after treated Bee Venom and Sweet Bee Venom according to the dosage dependent variation are investigated the histologic changes after injection of these Pharmacopuncture. Result : Following results were obtained from the preadipocyte proliferation and lipolysis of adipocyte and histologic investigation of fat tissue. 1. Bee Venom and Sweet Bee Venom showed the effect of decreased preadipocyte proliferation depend on concentration. 2. Bee Venom and Sweet Bee Venom showed the effect of decreased the activity of glycerol-3-phosphate dehydrogenase(GPDH significantly. 3. Bee Venom was not showed the effect of lipolysis, but Sweet Bee Venom was increased in low dosage and decreased in high dosage. 4. Investigated the histologic changes in porcine fat tissue after treated Bee Venom and Sweet Bee Venom, we knew that these Pharmacopuncture was activated nonspecific lysis of cell membranes depend on concentration. Conclusion : These results suggest that Bee Venom and Sweet Bee Venom efficiently induces decreased proliferation of preadipocyte and lipolysis in adipose tissue

  7. Molecular cloning and characterization of a venom phospholipase A2 from the bumblebee Bombus ignitus.

    Science.gov (United States)

    Xin, Yu; Choo, Young Moo; Hu, Zhigang; Lee, Kwang Sik; Yoon, Hyung Joo; Cui, Zheng; Sohn, Hung Dae; Jin, Byung Rae

    2009-10-01

    Phospholipase A(2) (PLA(2)) is one of the main components of bee venom. Here, we identify a venom PLA(2) from the bumblebee, Bombus ignitus. Bumblebee venom PLA(2) (Bi-PLA(2)) cDNA, which was identified by searching B. ignitus venom gland expressed sequence tags, encodes a 180 amino acid protein. Comparison of the genomic sequence with the cDNA sequence revealed the presence of four exons and three introns in the Bi-PLA(2) gene. Bi-PLA(2) is an 18-kDa glycoprotein. It is expressed in the venom gland, cleaved between the residues Arg44 and Ile45, and then stored in the venom sac. Comparative analysis revealed that the mature Bi-PLA(2) (136 amino acids) possesses features consistent with other bee PLA(2)s, including ten conserved cysteine residues, as well as a highly conserved Ca(2+)-binding site and active site. Phylogenetic analysis of bee PLA(2)s separated the bumblebee and honeybee PLA(2) proteins into two groups. The mature Bi-PLA(2) purified from the venom of B. ignitus worker bees hydrolyzed DBPC, a known substrate of PLA(2). Immunofluorescence staining of Bi-PLA(2)-treated insect Sf9 cells revealed that Bi-PLA(2) binds at the cell membrane and induces apoptotic cell death. PMID:19539776

  8. Experimental Study on the comparison of antibacterial and antioxidant effects between the Bee Venom and Sweet Bee Venom

    Directory of Open Access Journals (Sweden)

    Joong chul An

    2006-12-01

    Full Text Available Objectives : This study was conducted to compare antibacterial activities and free radical scavenging activity between the Bee Venom and Sweet Bee Venom in which the allergy-causing enzyme is removed. Methods : To evaluate antibacterial activities of the test samples, gram negative E. coli and gram positive St. aureus were compared using the paper disc method. For comparison of the antioxidant effects, DPPH (1,1-diphenyl-2-picrylhydrazyl free radical scavenging assay and Thiobarbituric Acid Reactive Substances (TBARS assay were conducted. Results : 1. Antibacterial activity against gram negative E. coli was greater in the Sweet Bee Venom group than the Bee Venom group. 2. Antibacterial activity against gram positive St. aureus was similar between the Bee Venom and Sweet Bee Venom groups. 3. DPPH free radical scavenging activity of the Bee Venom group showed 2.8 times stronger than that of the Sweet Bee Venom group. 4. Inhibition of lipid peroxidation of the Bee Venom group showed 782 times greater than that of the Sweet Bee Venom group. Conclusions : The Bee Venom group showed outstanding antibacterial activity against gram positive St. aureus, and allergen-removed Sweet Bee Venom group showed outstanding antibacterial activity against both gram negative E. coli and gram positive St. aureus. For antioxidant effects, the Bee Venom was superior over the Sweet Bee Venom and the superiority was far more apparent for lipid peroxidation.

  9. Elevated and cross-responsive CD1a-reactive T cells in bee and wasp venom allergic individuals.

    Science.gov (United States)

    Subramaniam, Sumithra; Aslam, Aamir; Misbah, Siraj A; Salio, Mariolina; Cerundolo, Vincenzo; Moody, D Branch; Ogg, Graham

    2016-01-01

    The role of CD1a-reactive T cells in human allergic disease is unknown. We have previously shown that circulating CD1a-reactive T cells recognize neolipid antigens generated by bee and wasp venom phospholipase, and here tested the hypothesis that venom-responsive CD1a-reactive T cells associate with venom allergy. Circulating T cells from bee and wasp venom allergic individuals, before and during immunotherapy, were exposed to CD1a-transfected K562 cells in the presence of wasp or bee venom. T-cell response was evaluated based on IFNγ, GM-CSF, and IL-13 cytokine production. Venom allergic individuals showed significantly higher frequencies of IFN-γ, GM-CSF, and IL-13 producing CD1a-reactive T cells responsive to venom and venom-derived phospholipase than healthy individuals. Venom-responsive CD1a-reactive T cells were cross-responsive between wasp and bee suggesting shared pathways of allergenicity. Frequencies of CD1a-reactive T cells were initially induced during subcutaneous immunotherapy, peaking by weeks 5, but then reduced despite escalation of antigen dose. Our current understanding of venom allergy and immunotherapy is largely based on peptide and protein-specific T cell and antibody responses. Here, we show that lipid antigens and CD1a-reactive T cells associate with the allergic response. These data have implications for mechanisms of allergy and approaches to immunotherapy. PMID:26518614

  10. Pharmacological evaluation of bee venom and melittin

    OpenAIRE

    Camila G. Dantas; Tássia L.G.M. Nunes; Tâmara L.G.M. Nunes; Ailma O. da Paixão; Francisco P. Reis; Waldecy de L. Júnior; Juliana C. Cardoso; Kátia P. Gramacho; Gomes, Margarete Z

    2014-01-01

    The objective of this study was to identify the pharmacological effects of bee venom and its major component, melittin, on the nervous system of mice. For the pharmacological analysis, mice were treated once with saline, 0.1 or 1.2 mg/kg of bee venom and 0.1 mg/kg of melittin, subcutaneously, 30 min before being submitted to behavioral tests: locomotor activity and grooming (open-field), catalepsy, anxiety (elevated plus-maze), depression (forced swimming test) and apomorphine-induced stereot...

  11. Antifungal Activity of Bee Venom and Sweet Bee Venom against Clinically Isolated Candida albicans

    OpenAIRE

    Seung-Bae Lee

    2016-01-01

    Objectives: The purpose of this study was to investigate the antifungal effect of bee venom (BV) and sweet bee venom (SBV) against Candida albicans (C. albicans) clinical isolates. Methods: In this study, BV and SBV were examined for antifungal activities against the Korean Collection for Type Cultures (KCTC) strain and 10 clinical isolates of C. albicans. The disk diffusion method was used to measure the antifungal activity and minimum inhibitory concentration (MIC) assays were performed by ...

  12. Study on Bee venom and Pain

    Directory of Open Access Journals (Sweden)

    Hyoung-Seok Yun

    2000-07-01

    Full Text Available In order to study Bee venom and Pain, We searched Journals and Internet. The results were as follows: 1. The domestic papers were total 13. 4 papers were published at The journal of korean acupuncture & moxibustion society, 3 papers were published at The journal of korean oriental medical society, Each The journal of KyoungHee University Oriental Medicine and The journal of korean sports oriental medical society published 1 papers and Unpublished desertations were 3. The clinical studies were 4 and the experimental studies were 9. 2. The domestic clinical studies reported that Bee venom Herbal Acupuncture therapy was effective on HIVD, Subacute arthritis of Knee Joint and Sequale of sprain. In the domestic experimental studies, 5 were related to analgesic effect of Bee vnom and 4 were related to mechanism of analgesia. 3. The journals searched by PubMed were total 18. 5 papers were published at Pain, Each 2 papers were published at Neurosci Lett. and Br J Pharmacol, and Each Eur J Pain, J Rheumatol, Brain Res, Neuroscience, Nature and Toxicon et al published 1 paper. 4. In the journals searched by PubMed, Only the experimental studies were existed. 8 papers used Bee Venom as pain induction substance and 1 paper was related to analgesic effects of Bee venom. 5. 15 webpage were searched by internet related to Bee Venom and pain. 11 were the introduction related to arthritis, 1 was the advertisement, 1 was the patient's experience, 1 was the case report on RA, 1 was review article.

  13. Effect of Iranian Honey bee (Apis Mellifera Venom on Blood Glucose and Insulin in Diabetic Rats

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    Seyyedeh Mahbubeh Mousavi

    2012-12-01

    Full Text Available Background: Diabetes is an important disease. This disease is a metabolic disorder characterized by hyperglycemia resulting from perturbation in insulin secretion, insulin action or both. Honey bee venom contains a wide range of polypeptide agents. The principle components of bee venom are mellitin and phospholipase A2. These components increase insulin secretion from the β-cells of pancreas. This study was conducted to show the hypoglycemic effect of honey bee venom on alloxan induced diabetic male rats.Methods: Eighteen adult male rats weighting 200±20 g were placed into 3 randomly groups: control, alloxan monohy­drate-induced diabetic rat and treated group that received honey bee venom daily before their nutrition for four months. Forty eight hours after the last injection, blood was collected from their heart, serum was dissented and blood glucose, insulin, triglyceride and total cholesterol were determined.Results: Glucose serum, triglyceride and total cholesterol level in treated group in comparison with diabetic group was significantly decreased (P< 0.01. On the other hand, using bee venom causes increase in insulin serum in com­parison with diabetic group (P< 0.05.Conclusion: Honeybee venom (apitoxin can be used as therapeutic option to lower blood glucose and lipids in dia­betic rats.

  14. Studies on Bee Venom and Its Medical Uses

    Science.gov (United States)

    Ali, Mahmoud Abdu Al-Samie Mohamed

    2012-07-01

    Use of honey and other bee products in human treatments traced back thousands of years and healing properties are included in many religious texts including the Veda, Bible and Quran. Apitherapy is the use of honey bee products for medical purposes, this include bee venom, raw honey, royal jelly, pollen, propolis, and beeswax. Whereas bee venom therapy is the use of live bee stings (or injectable venom) to treat various diseases such as arthritis, rheumatoid arthritis, multiple sclerosis (MS), lupus, sciatica, low back pain, and tennis elbow to name a few. It refers to any use of venom to assist the body in healing itself. Bee venom contains at least 18 pharmacologically active components including various enzymes, peptides and amines. Sulfur is believed to be the main element in inducing the release of cortisol from the adrenal glands and in protecting the body from infections. Contact with bee venom produces a complex cascade of reactions in the human body. The bee venom is safe for human treatments, the median lethal dose (LD50) for an adult human is 2.8 mg of venom per kg of body weight, i.e. a person weighing 60 kg has a 50% chance of surviving injections totaling 168 mg of bee venom. Assuming each bee injects all its venom and no stings are quickly removed at a maximum of 0.3 mg venom per sting, 560 stings could well be lethal for such a person. For a child weighing 10 kg, as little as 93.33 stings could be fatal. However, most human deaths result from one or few bee stings due to allergic reactions, heart failure or suffocation from swelling around the neck or the mouth. As compare with other human diseases, accidents and other unusual cases, the bee venom is very safe for human treatments.

  15. Bee Venom Pharmacopuncture Responses According to Sasang Constitution and Gender

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    Kim Chaeweon

    2013-12-01

    Full Text Available Objectives: The current study was performed to compare the bee venom pharmacopuncture skin test reactions among groups with different sexes and Sasang constitutions. Methods: Between July 2012 and June 2013, all 76 patients who underwent bee venom pharmacopuncture skin tests and Sasang constitution diagnoses at Oriental Medicine Hospital of Sangji University were included in this study. The skin test was performed on the patient’s forearm intracutaneously with 0.05 ml of sweet bee venom (SBV on their first visit. If the patients showed a positive response, the test was discontinued. On the other hand, if the patient showed a negative response, the test was performed on the opposite forearm intracutaneously with 0.05 ml of bee venom pharmacopuncture 25% on the next day or the next visit. Three groups were made to compare the differences in the bee venom pharmacopuncture skin tests according to sexual difference and Sasang constitution: group A showed a positive response to SBV, group B showed a positive response to bee venom pharmacopuncture 25%, and group C showed a negative response on all bee venom pharmacopuncture skin tests. Fisher’s exact test was performed to evaluate the differences statistically. Results: The results of the bee venom pharmacopuncture skin tests showed no significant differences according to Sasang constitution (P = 0.300 or sexual difference (P = 0.163. Conclusion: No significant differences on the results of bee venom pharmacopuncture skin tests were observed according to two factors, Sasang constitution and the sexual difference.

  16. Melittin, the Major Pain-Producing Substance of Bee Venom.

    Science.gov (United States)

    Chen, Jun; Guan, Su-Min; Sun, Wei; Fu, Han

    2016-06-01

    Melittin is a basic 26-amino-acid polypeptide that constitutes 40-60% of dry honeybee (Apis mellifera) venom. Although much is known about its strong surface activity on lipid membranes, less is known about its pain-producing effects in the nervous system. In this review, we provide lines of accumulating evidence to support the hypothesis that melittin is the major pain-producing substance of bee venom. At the psychophysical and behavioral levels, subcutaneous injection of melittin causes tonic pain sensation and pain-related behaviors in both humans and animals. At the cellular level, melittin activates primary nociceptor cells through direct and indirect effects. On one hand, melittin can selectively open thermal nociceptor transient receptor potential vanilloid receptor channels via phospholipase A2-lipoxygenase/cyclooxygenase metabolites, leading to depolarization of primary nociceptor cells. On the other hand, algogens and inflammatory/pro-inflammatory mediators released from the tissue matrix by melittin's pore-forming effects can activate primary nociceptor cells through both ligand-gated receptor channels and the G-protein-coupled receptor-mediated opening of transient receptor potential canonical channels. Moreover, subcutaneous melittin up-regulates Nav1.8 and Nav1.9 subunits, resulting in the enhancement of tetrodotoxin-resistant Na(+) currents and the generation of long-term action potential firing. These nociceptive responses in the periphery finally activate and sensitize the spinal dorsal horn pain-signaling neurons, resulting in spontaneous nociceptive paw flinches and pain hypersensitivity to thermal and mechanical stimuli. Taken together, it is concluded that melittin is the major pain-producing substance of bee venom, by which peripheral persistent pain and hyperalgesia (or allodynia), primary nociceptive neuronal sensitization, and CNS synaptic plasticity (or metaplasticity) can be readily induced and the molecular and cellular mechanisms

  17. Polymerized soluble venom--human serum albumin

    International Nuclear Information System (INIS)

    Extensive previous studies have demonstrated that attempts to produce polymers of Hymenoptera venoms for human immunotherapy resulted in insoluble precipitates that could be injected with safety but with very limited immunogenicity in allergic patients. We now report soluble polymers prepared by conjugating bee venom with human serum albumin with glutaraldehyde. The bee venom-albumin polymer (BVAP) preparation was fractionated on Sephacryl S-300 to have a molecular weight range higher than catalase. 125I-labeled bee venom phospholipase A was almost completely incorporated into BVAP. Rabbit antibody responses to bee venom and bee venom phospholipase A were induced by BVAP. Human antisera against bee venom were absorbed by BVAP. No new antigenic determinants on BVAP were present as evidenced by absorption of antisera against BVAP by bee venom and albumin. BVAP has potential immunotherapeutic value in patients with anaphylactic sensitivity to bee venom

  18. Human scFv antibodies (Afribumabs) against Africanized bee venom: Advances in melittin recognition.

    Science.gov (United States)

    Pessenda, Gabriela; Silva, Luciano C; Campos, Lucas B; Pacello, Elenice M; Pucca, Manuela B; Martinez, Edson Z; Barbosa, José E

    2016-03-15

    Africanized Apis mellifera bees, also known as killer bees, have an exceptional defensive instinct, characterized by mass attacks that may cause envenomation or death. From the years 2000-2013, 77,066 bee accidents occurred in Brazil. Bee venom comprises several substances, including melittin and phospholipase A2 (PLA2). Due to the lack of antivenom for bee envenomation, this study aimed to produce human monoclonal antibody fragments (single chain fragment variable; scFv), by using phage display technology. These fragments targeted melittin and PLA2, the two major components of bee venom, to minimize their toxic effects in cases of mass envenomation. Two phage antibody selections were performed using purified melittin. As the commercial melittin is contaminated with PLA2, phages specific to PLA2 were also obtained during one of the selections. Specific clones for melittin and PLA2 were selected for the production of soluble scFvs, named here Afribumabs: prefix: afrib- (from Africanized bee); stem/suffix: -umab (fully human antibody). Afribumabs 1 and 2 were tested in in vitro and in vivo assays to assess their ability to inhibit the toxic actions of purified melittin, PLA2, and crude bee venom. Afribumabs reduced hemolysis caused by purified melittin and PLA2 and by crude venom in vitro and reduced edema formation in the paws of mice and prolonged the survival of venom-injected animals in vivo. These results demonstrate that Afribumabs may contribute to the production of the first non-heterologous antivenom treatment against bee envenomation. Such a treatment may overcome some of the difficulties associated with conventional immunotherapy techniques. PMID:26829652

  19. Study on Bee venom and Pain

    OpenAIRE

    Hyoung-Seok Yun; Young-Suk Kim; Jae-Dong Lee

    2000-01-01

    In order to study Bee venom and Pain, We searched Journals and Internet. The results were as follows: 1. The domestic papers were total 13. 4 papers were published at The journal of korean acupuncture & moxibustion society, 3 papers were published at The journal of korean oriental medical society, Each The journal of KyoungHee University Oriental Medicine and The journal of korean sports oriental medical society published 1 papers and Unpublished desertations were 3. The clinical studies were...

  20. In Vitro Antiplasmodial Activity of Phospholipases A2 and a Phospholipase Homologue Isolated from the Venom of the Snake Bothrops asper

    Directory of Open Access Journals (Sweden)

    Juan Carlos Alarcón Pérez

    2012-12-01

    Full Text Available The antimicrobial and antiparasite activity of phospholipase A2 (PLA2 from snakes and bees has been extensively explored. We studied the antiplasmodial effect of the whole venom of the snake Bothrops asper and of two fractions purified by ion-exchange chromatography: one containing catalytically-active phospholipases A2 (PLA2 (fraction V and another containing a PLA2 homologue devoid of enzymatic activity (fraction VI. The antiplasmodial effect was assessed on in vitro cultures of Plasmodium falciparum. The whole venom of B. asper, as well as its fractions V and VI, were active against the parasite at 0.13 ± 0.01 µg/mL, 1.42 ± 0.56 µg/mL and 22.89 ± 1.22 µg/mL, respectively. Differences in the cytotoxic activity on peripheral blood mononuclear cells between the whole venom and fractions V and VI were observed, fraction V showing higher toxicity than total venom and fraction VI. Regarding toxicity in mice, the whole venom showed the highest lethal effect in comparison to fractions V and VI. These results suggest that B. asper PLA2 and its homologue have antiplasmodial potential.

  1. Component Analysis of Bee Venom from lune to September

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    Ki Rok Kwon

    2007-06-01

    Full Text Available Objectives : The aim of this study was to observe variation of Bee Venom content from the collection period. Methods : Content analysis of Bee Venom was rendered using HPLC method by standard melittin Results : Analyzing melittin content using HPLC, 478.97mg/g at june , 493.89mg/g at july, 468.18mg/g at August and 482.15mg/g was containing in Bee Venom at september. So the change of melittin contents was no significance from June to September. Conclusion : Above these results, we concluded carefully that collecting time was not important factor for the quality control of Bee Venom, restricted the period from June to September.

  2. Honey Bee Venom (Apis mellifera Contains Anticoagulation Factors and Increases the Blood-clotting Time

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    Hossein Zolfagharian

    2015-12-01

    Full Text Available Objectives: Bee venom (BV is a complex mixture of proteins and contains proteins such as phospholipase and melittin, which have an effect on blood clotting and blood clots. The mechanism of action of honey bee venom (HBV, Apis mellifera on human plasma proteins and its anti-thrombotic effect were studied. The purpose of this study was to investigate the anti-coagulation effect of BV and its effects on blood coagulation and purification. Methods: Crude venom obtained from Apis mellifera was selected. The anti-coagulation factor of the crude venom from this species was purified by using gel filtration chromatography (sephadex G-50, and the molecular weights of the anti-coagulants in this venom estimated by using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE. Blood samples were obtained from 10 rabbits, and the prothrombin time (PT and the partial thromboplastin time (PTT tests were conducted. The approximate lethal dose (LD values of BV were determined. Results: Crude BV increased the blood clotting time. For BV concentrations from 1 to 4 mg/mL, clotting was not observed even at more than 300 seconds, standard deviations (SDs = ± 0.71; however, clotting was observed in the control group 13.8 s, SDs = ± 0.52. Thus, BV can be considered as containing anti-coagulation factors. Crude BV is composed 4 protein bands with molecular weights of 3, 15, 20 and 41 kilodalton (kDa, respectively. The LD50 of the crude BV was found to be 177.8 μg/mouse. Conclusion: BV contains anti-coagulation factors. The fraction extracted from the Iranian bees contains proteins that are similar to anti-coagulation proteins, such as phospholipase A2 (PLA2 and melittin, and that can increase the blood clotting times in vitro.

  3. Immune thrombocytopenia after bee venom therapy: a case report

    OpenAIRE

    Abdulsalam, Mohammad Adel; Ebrahim, Bader Esmael; Abdulsalam, Ahmad Jasem

    2016-01-01

    Background Immune thrombocytopenia (ITP) is a hematological disorder with an isolated decrease in number of circulating platelets. Bee venom therapy (BVT) is a form of alternative medicine. It is still being practiced in the Middle East and other parts of Asia. In BVT, acupuncture points are used to inject diluted bee venom into the body. The pharmacological basis behind BVT is not fully understood. However, it has been used to treat various medical conditions such as arthritis and low back p...

  4. Effects of gamma radiation on bee venom: preliminary studies

    International Nuclear Information System (INIS)

    Africanized honeybees are very common insects in Brazil and frequently cause accidents followed by important immunological reactions and even deaths. Their venoms are composed of a complex mixture of substances of general biological actions. several works utilizing ionizing radiation showed that it is able to modify protein structures, and successfully detoxify snake venoms toxins, although maintaining its immunological properties. The main objective of this paper was to study the effects of gamma radiation on bee venom, regarding some biochemical and toxicological aspects. Africanized Apis melllifera whole venom (2 mg/ml) in 0.15 M Na Cl solution was irradiated with 2 kGy in a 60 Co source. Preliminary studies has been carried out in order to identify some biochemical changes after irradiation. Concerning this, irradiated and native venom were submitted to a molecular exclusion chromatography (Sephadex G-100), UV absorption spectrum and protein concentration analysis. It could be seen that irradiated bee venom spectrum presented differences when compared to native bee venom, suggesting that some structural alterations has occurred. Protein concentration and chromatography profiles were not changes after irradiation. In order to evaluate the toxicity a lethality assay (L D50) has been performed with both venoms, and irradiated venom showed to be less toxic than native one. (author)

  5. Experimental Study on the comparison of antibacterial and antioxidant effects between the Bee Venom and Sweet Bee Venom

    OpenAIRE

    Joong chul An; Ki Rok Kwon; Eun Hee Lee; Bae Chun Cha

    2006-01-01

    Objectives : This study was conducted to compare antibacterial activities and free radical scavenging activity between the Bee Venom and Sweet Bee Venom in which the allergy-causing enzyme is removed. Methods : To evaluate antibacterial activities of the test samples, gram negative E. coli and gram positive St. aureus were compared using the paper disc method. For comparison of the antioxidant effects, DPPH (1,1-diphenyl-2-picrylhydrazyl) free radical scavenging assay and Thiobarbituric Ac...

  6. Cross-reactivity and phospholipase A2 neutralization of anti-irradiated Bothrops jararaca venom antibodies

    International Nuclear Information System (INIS)

    The detoxified Bothrops jararaca venom, immunized rabbits with the toxoid obtained and investigated cross-reactivity of the antibodies obtained against autologous and heterelogous venoms was presented. It was also investigated the ability of the IgGs, purified by affinity chromatography, from those sera to neutralize phospholipase. A2, an ubiquous enzyme in animal venoms. Results indicate that venom irradiation leads to an attenuation of toxicity of 84%. Cross-reactivity was investigated by ELISA and Western blot and all venoms were reactive to the antibodies. On what refers to phospholipase A2 activity neutralization, the antibodies neutralized autologous venoms efficiently and, curiously, other venoms from the same genus were not neutralized, while Lachesis muta venom, a remote related specier, was neutralized by this serum. These data suggest that irradiation preserve important epitopes for induction of neutralizing antibodies and that these epitopes are not shared by all venoms assayed. (author). 8 refs, 2 figs, 3 tabs

  7. EXPRESSION OF A BEE-VENOM PHOSPHOLIPASE A2 FROM APIS CERANA CERANA IN ESCHERICHIA COLI%中华蜜蜂蜂毒磷脂酶A2基因在大肠杆菌中的表达

    Institute of Scientific and Technical Information of China (English)

    沈立荣; 程家安; 张传溪

    2004-01-01

    将中华蜜蜂蜂毒磷脂酶A2(AcPLA2)蛋白成熟肽编码区基因(495 bp)克隆至表达载体-pETBlue-1,在大肠杆菌Tuner(DE3)plac I中诱导表达,经SDS--PAGE电泳检测,表达产物分子量为15kD,约占细菌总蛋白的百分之四点六;用意大利蜜蜂蜂毒磷脂酶A2(AmPLA2)纯品制备的兔源多克隆抗体为一抗作Westerm blot,表达产物显示类似于天然纯AmPLA2的特异性印迹,证实AcPLA2基因已在大肠杆菌中得到表达.%The venomous phospholipase A2 (AcPLA2) coding reading region of the Chinese honeybee (Apis cerana cerana),which is composed of 405 bp encoding a mature glycosylated peptide with 134 amino residues , was transformed into the expression vector pETblue-1. Then the recombinant vector was introduced into Escherichia coli Tuner (DE3) placⅠfor expression. Analysis result of SDS-PAGE showed that the expression products had a protein band of about 15 kD. Detection of western blot using ant-European honeybee (Apis mellifera)phospholipase A2 (AmPLA2) polyclonal serum as the first antibody showed that the expression products appeared a special blot same as the native AmPLA2. The result demonstrated that the AcPLA2 peptide had been expressed in E. coli. and the AcPLA2 has the similar antigenicity as the AmPLA2.

  8. An electrophoretic study on phospholipase A2 isoenzymes in the venoms of Central American crotaline snakes.

    Science.gov (United States)

    Valiente, C; Moreno, E; Sittenfeld, A; Lomonte, B; Gutiérrez, J M

    1992-08-01

    The number and isoelectric points of phospholipase A2 isoenzymes were studied in the venoms of 12 Central American crotaline snakes of the genera Bothrops, Crotalus, Lachesis and Agkistrodon. The study was carried out by using a methodology based on electrophoretic separation of venoms, transfer to nitrocellulose and detection of activity of the bands by an indirect hemolytic assay in agarose-erythrocyte-egg yolk gels. All venoms tested had indirect hemolytic activity, although they varied in the number and isoelectric point of their phospholipases A2. Most venoms had predominantly acidic isoenzymes, with the exception of A. bilineatus which had mainly basic isoenzymes and B. schlegelii which had both acidic and basic isoenzymes. Analysis of interindividual variability in B. asper venom demonstrated that two phospholipase A2 isoenzymes are present in some venoms but absent in others. Polyvalent antivenom was effective in neutralizing phospholipase A2 activity of the 12 venoms tested, when venoms and antivenom were incubated in the fluid phase. This work demonstrates a conspicuous interspecific variability in the number and isoelectric points of phospholipases A2 present in Central American crotaline snake venoms. PMID:1523675

  9. Antibacterial Activity of Melittin Derived from Honey Bee Venom

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    Mohsen Momenzadeh

    2014-01-01

    Full Text Available Abstract Background and objective: Bacterial peritonitis is one of the nosocomial infections that is due to direct invasion of bacteria to peritoneal membrane. Resistance to antibiotic is of great significance in this disease and could be led to morbidity and mortality of patients. During the past decade, tracing for natural antimicrobial peptide is more considered. Among them, melittin has been extracted from honey bee venom and its antibacterial activity is being examined. The main goal of this study was isolation of melittin from honey bee venom and evaluation of its antibacterial activity against the agents of bacterial peritonitis. Materials and methods: Honey bee venom prepared using electrical stimulation and the quality of venom confirmed by SDS-PAGE. Melittin isolated from the venom using a linear gradient of acetonitrile and C18 column by Reverse Phase-High Performance Chromatography (RP-HPLC. Minimal Inhibition and Bactericidal concentration for melittin examined on Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa. Results: Honey bee venom composed of twenty distinct fraction in which melittin was the major one. Melittin inhibited Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa growth at 0.39, 6.25, and 12.5 µg and was bactericide at 1.56, 25, and >50 µg respectively. Conclusion: Melittin specifically invade the corresponding bacteria and induce significant inhibitory and bactericidal activity against the main agents of bacterial peritonitis. Complementary studies in animal model would be overcome bacterial drug resistance issue specifically in bacterial peritonitis.

  10. Quantitative Proteomic Analysis of Venoms from Russian Vipers of Pelias Group: Phospholipases A2 are the Main Venom Components

    Science.gov (United States)

    Kovalchuk, Sergey I.; Ziganshin, Rustam H.; Starkov, Vladislav G.; Tsetlin, Victor I.; Utkin, Yuri N.

    2016-01-01

    Venoms of most Russian viper species are poorly characterized. Here, by quantitative chromato-mass-spectrometry, we analyzed protein and peptide compositions of venoms from four Vipera species (V. kaznakovi, V. renardi, V. orlovi and V. nikolskii) inhabiting different regions of Russia. In all these species, the main components were phospholipases A2, their content ranging from 24% in V. orlovi to 65% in V. nikolskii. Altogether, enzyme content in venom of V. nikolskii reached ~85%. Among the non-enzymatic proteins, the most abundant were disintegrins (14%) in the V. renardi venom, C-type lectin like (12.5%) in V. kaznakovi, cysteine-rich venom proteins (12%) in V. orlovi and venom endothelial growth factors (8%) in V. nikolskii. In total, 210 proteins and 512 endogenous peptides were identified in the four viper venoms. They represented 14 snake venom protein families, most of which were found in the venoms of Vipera snakes previously. However, phospholipase B and nucleotide degrading enzymes were reported here for the first time. Compositions of V. kaznakovi and V. orlovi venoms were described for the first time and showed the greatest similarity among the four venoms studied, which probably reflected close relationship between these species within the “kaznakovi” complex. PMID:27077884

  11. Antifungal Activity of Bee Venom and Sweet Bee Venom against Clinically Isolated Candida albicans

    Directory of Open Access Journals (Sweden)

    Seung-Bae Lee

    2016-03-01

    Full Text Available Objectives: The purpose of this study was to investigate the antifungal effect of bee venom (BV and sweet bee venom (SBV against Candida albicans (C. albicans clinical isolates. Methods: In this study, BV and SBV were examined for antifungal activities against the Korean Collection for Type Cultures (KCTC strain and 10 clinical isolates of C. albicans. The disk diffusion method was used to measure the antifungal activity and minimum inhibitory concentration (MIC assays were performed by using a broth microdilution method. Also, a killing curve assay was conducted to investigate the kinetics of the anti- fungal action. Results: BV and SBV showed antifungal activity against 10 clinical isolates of C. albicans that were cultured from blood and the vagina by using disk diffusion method. The MIC values obtained for clinical isolates by using the broth microdilution method varied from 62.5 μg/ mL to 125 μg/mL for BV and from 15.63 μg/mL to 62.5 μg/mL for SBV. In the killing-curve assay, SBV behaved as amphotericin B, which was used as positive control, did. The antifungal efficacy of SBV was much higher than that of BV. Conclusion: BV and SBV showed antifungal activity against C. albicans clinical strains that were isolated from blood and the vagina. Especially, SBV might be a candidate for a new antifungal agent against C. albicans clinical isolates.

  12. Spinal processing of bee venom-induced pain and hyperalgesia

    Institute of Scientific and Technical Information of China (English)

    Jun CHEN

    2008-01-01

    Subcutaneous injection of bee venom causes long-term neural activation and hypersensitization in the dorsal horn of the spinal cord, which contributes to the development and maintenance of various pain-related behaviors. The unique behavioral 'pheno-types' of nociception and hypersensitivity identified in the rodent bee venom test are believed to reflect a complex pathological state of inflammatory pain and might be appropriate to the study of phenotype-based mechanisms of pain and hyperalgesia. In this review, the spinal processing of the bee venom-induced different 'phenotypes' of pain and hyperalgesia will be described. The accumulative electrophysiological, pharmacological, and behavioral data strongly suggest that different 'phenotypes' of pain and hyperalgesia are mediated by different spinal signaling pathways. Unraveling the phenotype-based mechanisms of pain might be useful in development of novel therapeutic drugs against complex clinic pathological pain.

  13. Identification and properties of very high affinity brain membrane-binding sites for a neurotoxic phospholipase from the taipan venom

    International Nuclear Information System (INIS)

    Four new monochain phospholipases were purified from the Oxyuranus scutellatus (taipan) venom. Three of them were highly toxic when injected into mice brain. One of these neurotoxic phospholipases, OS2, was iodinated and used in binding experiments to demonstrate the presence of two families of specific binding sites in rat brain synaptic membranes. The affinities were exceptionally high, Kd1 = 1.5 +/- 0.5 pM and Kd2 = 45 +/- 10 pM, and the maximal binding capacities were Bmax 1 = 1 +/- 0.4 and Bmax 2 = 3 +/- 0.5 pmol/mg of protein. Both binding sites were sensitive to proteolysis and demonstrated to be located on proteins of Mr 85,000-88,000 and 36,000-51,000 by cross-linking and photoaffinity labeling techniques. The binding of 125I-OS2 to synaptic membranes was dependent on Ca2+ ions and enhanced by Zn2+ ions which inhibit phospholipase activity. Competition experiments have shown that, except for beta-bungarotoxin, a number of known toxic snake or bee phospholipases have very high affinities for the newly identified binding sites. A good correlation (r = 0.80) was observed between toxicity and affinity but not between phospholipase activity and affinity

  14. Preformulation Studies of Bee Venom for the Preparation of Bee Venom-Loaded PLGA Particles

    Directory of Open Access Journals (Sweden)

    Min-Ho Park

    2015-08-01

    Full Text Available It is known that allergic people was potentially vulnerable to bee venom (BV, which can induce an anaphylactic shock, eventually leading to death. Up until recently, this kind of allergy was treated only by venom immunotherapy (VIT and its efficacy has been recognized worldwide. This treatment is practiced by subcutaneous injections that gradually increase the doses of the allergen. This is inconvenient for patients due to frequent injections. Poly (D,L-lactide-co-glycolide (PLGA has been broadly studied as a carrier for drug delivery systems (DDS of proteins and peptides. PLGA particles usually induce a sustained release. In this study, the physicochemical properties of BV were examined prior to the preparation of BV-loaded PLGA nanoparticles NPs. The content of melittin, the main component of BV, was 53.3%. When protected from the light BV was stable at 4 °C in distilled water, during 8 weeks. BV-loaded PLGA particles were prepared using dichloromethane as the most suitable organic solvent and two min of ultrasonic emulsification time. This study has characterized the physicochemical properties of BV for the preparation BV-loaded PLGA NPs in order to design and optimize a suitable sustained release system in the future.

  15. Expression of enzymatically inactive wasp venom phospholipase A1 in Pichia pastoris.

    Directory of Open Access Journals (Sweden)

    Irina Borodina

    Full Text Available Wasp venom allergy is the most common insect venom allergy in Europe. It is manifested by large local reaction or anaphylactic shock occurring after a wasp sting. The allergy can be treated by specific immunotherapy with whole venom extracts. Wasp venom is difficult and costly to obtain and is a subject to composition variation, therefore it can be advantageous to substitute it with a cocktail of recombinant allergens. One of the major venom allergens is phospholipase A1, which so far has been expressed in Escherichia coli and in insect cells. Our aim was to produce the protein in secreted form in yeast Pichia pastoris, which can give high yields of correctly folded protein on defined minimal medium and secretes relatively few native proteins simplifying purification.Residual amounts of enzymatically active phospholipase A1 could be expressed, but the venom protein had a deleterious effect on growth of the yeast cells. To overcome the problem we introduced three different point mutations at the critical points of the active site, where serine137, aspartate165 or histidine229 were replaced by alanine (S137A, D165A and H229A. All the three mutated forms could be expressed in P. pastoris. The H229A mutant did not have any detectable phospholipase A1 activity and was secreted at the level of several mg/L in shake flask culture. The protein was purified by nickel-affinity chromatography and its identity was confirmed by MALDI-TOF mass spectrometry. The protein could bind IgE antibodies from wasp venom allergic patients and could inhibit the binding of wasp venom to IgE antibodies specific for phospholipase A1 as shown by Enzyme Allergo-Sorbent Test (EAST. Moreover, the recombinant protein was allergenic in a biological assay as demonstrated by its capability to induce histamine release of wasp venom-sensitive basophils.The recombinant phospholipase A1 presents a good candidate for wasp venom immunotherapy.

  16. Comparison of Treatment Effects and Allergic responses to stiff neck between Sweet Bee Venom and Bee Venom Pharmacopuncture (A pilot study, Double blind, Randomized Controlled Clinical Trail

    Directory of Open Access Journals (Sweden)

    Kyoung-hee Lee

    2008-12-01

    Full Text Available Objective : The purpose of this study is to investigate the difference of treatment effects and allergic responses to stiff neck between Bee Venom Pharmacopuncture and Sweet Bee Venom Pharmacopuncture. Methods : Forty one patients who felt stiff neck were randomly divided into two groups, a Bee Venom Pharmacopuncture group(group Ⅰ and a Sweet Bee Venom Pharmacopuncture group(group Ⅱ. Evaluations of the treatment effects were made before and after a treatment using Visual Analog Scale(VAS, Neck Disability Index(NDI, Clinical Evaluation Grade(CEG. The comparison of allergic responses was measured with VAS. The obtained data were analyzed and compared with SPSS. Results : The group Ⅰ and group Ⅱ showed significant improvement(p<0.05 according to the VAS, NDI, CEG. And the differences between the two groups were insignificant according to VAS, NDI, CEG. But allergic responses such as localized edema, localized itching were significantly lower in group Ⅱ than group Ⅰ. Conclusions : It seems that there are no big different treatment effects between the two groups. Sweet Bee Venom Pharmacopuncture appears to be more effective measurement against allergic reactions than the Bee Venom Pharmacopuncture. Further studies are needed for the comparison of Bee Venom Pharmacopuncture and Sweet Bee Venom Pharmacopuncture.

  17. Mechanisms of immunotherapy to wasp and bee venom.

    Science.gov (United States)

    Ozdemir, C; Kucuksezer, U C; Akdis, M; Akdis, C A

    2011-09-01

    Hymenoptera venoms are important allergens that can elicit both local and systemic allergic reactions, including life-threatening anaphylaxis. Venom immunotherapy (VIT) remains the most effective treatment, reducing the risk of systemic reactions in individuals with Hymenoptera venom allergy. VIT can restore normal immunity against venom allergens and provide patients with a lifetime of tolerance to venoms. During VIT, peripheral tolerance is induced by the generation of allergen-specific regulatory T (Treg) cells, which suppress proliferative and cytokine responses against the venom allergens. Treg cells are characterized by IL-10 secretion that directly or indirectly influence effector cells of allergic inflammation, such as mast cells, basophils and eosinophils. Treg cells also have influence on B cells, suppressing IgE production and inducing the production of blocking type IgG4 antibodies against venom allergens. An accumulating body of evidence suggests that Treg cells may affect allergen sensitization and methods for enhancing this cell population may eventually improve the efficacy of VIT. In this article, immune mechanisms enrolled in bee and wasp VIT are reviewed. PMID:21729181

  18. Bee Venom and Its Component Apamin as Neuroprotective Agents in a Parkinson Disease Mouse Model

    OpenAIRE

    Alvarez-Fischer, Daniel; Noelker, Carmen; Vulinović, Franca; Grünewald, Anne; Chevarin, Caroline; Klein, Christine; Oertel, Wolfgang H.; Hirsch, Etienne C.; Michel, Patrick P.; Hartmann, Andreas

    2013-01-01

    Bee venom has recently been suggested to possess beneficial effects in the treatment of Parkinson disease (PD). For instance, it has been observed that bilateral acupoint stimulation of lower hind limbs with bee venom was protective in the acute 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) mouse model of PD. In particular, a specific component of bee venom, apamin, has previously been shown to have protective effects on dopaminergic neurons in vitro. However, no information regarding a...

  19. A Study on the Effects of Bee Venom Aqua-Acupuncture on Writhing Reflex

    Directory of Open Access Journals (Sweden)

    Jeong Sun-Hee

    2000-07-01

    Full Text Available Introduction:In spite of the use of Bee Venom aqua-acupuncture in the clinics, the scientific evaluation on effects is not enough. Bee Venom aqua-acupuncture is used according to the stimulation of acupuncture point and the chemical effects of Bee Venom. The aims of this study is to investigate the analgegic effects of the Bee Venom aqua-acupuncture, through the change of writhing reflex Materials and Methods:Pain animal model was used acetic acid method. The changes of writhing reflex of the mice which were derived pain by injecting acetic acid into the abdomen, after stimulating Bee Venom aqua-acupuncture on Chungwan(CV12 and non acupuncture point on the backside were measured. Results:1. It showed that the writhing reflex were appeared on the groups which injected acetic acid only, and saline-acetic acid group(sample I, but not on the group bee venom-saline group(sample II. 2. The change of writhing reflex by Chungwan(CV12 Bee Venom aqua-acupuncture showed significant decrease in the order of Chungwan(CV12 Bee Venom aqua-acupuncture group III(2.5×10-3g/kg, II(2.5×10-4g/kg, and I(2.5×10-5g/kg, compared with control group. There were significant decrease of number of writhing reflex in 5~10, 10~15 and 15~20 minutes intervals of Chung wan(CV12 Bee Venom aqua-acupuncture group I, and in 0~5, 5~10, 10~15 and 15~20 minutes intervals of II and III, compared with control group. 3. The change of writhing reflex by non acupuncture point Bee Venom aqua-acupuncture showed significant decrease in the 0~5 and 5~10 minutes intervals and the total number of writhing reflex in 2.5×10-4g/kg group, compared with control group 4. The effects of writhing reflex of Chungwan(CV12 Bee Venom aqua-acupuncture group showed significant decrease, compared with non acupuncture point Bee Venom aqua-acupuncture group. Conclusion:This study shows that the Bee Venom aqua-acupuncture on Chungwan(CV12 decreases the numbers of writhing reflex. As the

  20. Chemical characterization, antioxidant, anti-inflammatory and cytotoxic properties of bee venom collected in Northeast Portugal.

    Science.gov (United States)

    Sobral, Filipa; Sampaio, Andreia; Falcão, Soraia; Queiroz, Maria João R P; Calhelha, Ricardo C; Vilas-Boas, Miguel; Ferreira, Isabel C F R

    2016-08-01

    Bee venom (BV) or apitoxin is a complex mixture of substances with reported biological activity. In the present work, five bee venom samples obtained from Apis mellifera iberiensis from the Northeast Portugal (two different apiaries) were chemically characterized and evaluated for their antioxidant, anti-inflammatory and cytotoxic properties. The LC/DAD/ESI-MS(n) analysis of the samples showed that melittin was the most abundant compound, followed by phospholipase A2 and apamin. All the samples revealed antioxidant and anti-inflammatory activity but without a direct relation with any of the individual chemical components identified. The results highlight that there are specific concentrations (present in BV5) in which these compounds are more active. The BV samples showed similar cytotoxicity for all the tested tumour cell lines (MCF-7, NCI-H460, HeLa and HepG2), being MCF-7 and HeLa the most susceptible ones. Nevertheless, the studied samples seem to be suitable to treat breast, hepatocellular and cervical carcinoma because at the active concentrations, the samples were not toxic for non-tumour cells (PLP2). Regarding the non-small cell lung carcinoma, BV should be used under the toxic concentration for non-tumour cells. Overall, the present study corroborates the enormous bioactive potential of BV being the first report on samples from Portugal. PMID:27288930

  1. Rapid isolation and partial characterization of two phospholipases from Kenyan Echis carinatus leakeyi (Leakey's saw-scaled viper) venom.

    Science.gov (United States)

    Desmond, H P; Crampton, J M; Theakston, R D

    1991-01-01

    The purification and partial sequencing of two phospholipase A2 toxins from the venom of Kenyan E. carinatus leakeyi is described. The two proteins exhibit sequence homology with other toxic phospholipases. Both have a molecular weight in the region of 16,000 and are purified to homogeneity from crude venom by a single high performance liquid chromatography. The role of these proteins in the toxicity of the venom remains to be established. PMID:1862528

  2. Antibacterial Activity of Melittin Derived from Honey Bee Venom

    OpenAIRE

    Mohsen Momenzadeh; Delavar Shahbazzadeh1; Mohammad Dakhili; Mohammad Reza Zolfaghari; Kamran Pooshang Bagheri

    2014-01-01

    Abstract Background and objective: Bacterial peritonitis is one of the nosocomial infections that is due to direct invasion of bacteria to peritoneal membrane. Resistance to antibiotic is of great significance in this disease and could be led to morbidity and mortality of patients. During the past decade, tracing for natural antimicrobial peptide is more considered. Among them, melittin has been extracted from honey bee venom and its antibacterial activity is being examined. The main goal...

  3. Bee venom acupuncture for rheumatoid arthritis: a systematic review protocol

    OpenAIRE

    Lee, Ju Ah; Son, Mi Ju; Choi, Jiae; Yun, Kyung-Jin; Jun, Ji Hee; Lee, Myeong Soo

    2014-01-01

    Introduction This systematic review aims to analyse the trial data on the effects of bee venom acupuncture (BVA) for rheumatoid arthritis (RA). Methods and analysis The following 14 databases will be searched from their inception to March 2014: MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials (CENTRAL), AMED, CINAHL, six Korean medical databases (OASIS, Korean Traditional Knowledge Portal, Korean Studies Information Service System, KoreaMed, Korean Medical Database and DBPIA) a...

  4. Therapeutic Effects of Bee Venom on Immunological and Neurological Diseases

    OpenAIRE

    Deok-Sang Hwang; Sun Kwang Kim; Hyunsu Bae

    2015-01-01

    Bee Venom (BV) has long been used in Korea to relieve pain symptoms and to treat inflammatory diseases, such as rheumatoid arthritis. The underlying mechanisms of the anti-inflammatory and analgesic actions of BV have been proved to some extent. Additionally, recent clinical and experimental studies have demonstrated that BV and BV-derived active components are applicable to a wide range of immunological and neurodegenerative diseases, including autoimmune diseases and Parkinson’s disease. T...

  5. Effect of honey bee venom on lewis rats with experimental allergic encephalomyelitis, a model for multiple sclerosis.

    Science.gov (United States)

    Karimi, Akbar; Ahmadi, Farhad; Parivar, Kazem; Nabiuni, Mohammad; Haghighi, Saied; Imani, Sohrab; Afrouzi, Hossein

    2012-01-01

    Multiple sclerosis (MS) is a progressive and autoimmune neurodegenerative disease of the central nervous system (CNS). This disease is recognized through symptoms like inflammation, demyelination and the destruction of neurological actions. Experimental allergic encephalomyelitis (EAE) is a widely accepted animal model for MS. EAE is created in animals by injecting the tissue of myelin basic protein (MBP), CNS, or myelin oligodendrocyte glycoprotein (MOG) along with the adjuvant. EAE and MS are similar diseases. Honey Bee venom (Apis mellifera) contains a variety of low and high molecular weight peptides and proteins, including melittin, apamin, adolapin, mast cell degranulating peptide and phospholipase A2. Bee venom (BV) could exert anti-inflammatory and antinociceptive effects on the inflammatory reactions. The guinea pig spinal cord homogenate (GPSCH) is with the Complete Freund's Adjuvant (CFA), consisting of 1 mg/mL Mycobacterium tuberculosis. It was used for inducting EAE in Lewis rats for creating the MS model. The hematoxylin and eosin and luxol fast blue methods were used respectively in analyses of inflammation and detection of demyelination in the central nervous system. Furthermore, the ELISA and the high performance liquid chromatography (HPLC) were used for the assessment of tumor necrosis factor alpha (TNF-α) and nitrate in rats serum. In this study, we indicated that the treatment of EAE with Bee venom decreased the symptoms of clinical disorder, pathological changes, inflammatory cell infiltration, demyelination in the central nervous system, level of serum TNF-α, and the serum nitrates in rat EAE induced through GPSCH. PMID:24250492

  6. Bee Venom Promotes Hair Growth in Association with Inhibiting 5α-Reductase Expression.

    Science.gov (United States)

    Park, Seeun; Erdogan, Sedef; Hwang, Dahyun; Hwang, Seonwook; Han, Eun Hye; Lim, Young-Hee

    2016-06-01

    Alopecia is an important issue that can occur in people of all ages. Recent studies show that bee venom can be used to treat certain diseases including rheumatoid arthritis, neuralgia, and multiple sclerosis. In this study, we investigated the preventive effect of bee venom on alopecia, which was measured by applying bee venom (0.001, 0.005, 0.01%) or minoxidil (2%) as a positive control to the dorsal skin of female C57BL/6 mice for 19 d. Growth factors responsible for hair growth were analyzed by quantitative real-time PCR and Western blot analysis using mice skins and human dermal papilla cells (hDPCs). Bee venom promoted hair growth and inhibited transition from the anagen to catagen phase. In both anagen phase mice and dexamethasone-induced catagen phase mice, hair growth was increased dose dependently compared with controls. Bee venom inhibited the expression of SRD5A2, which encodes a type II 5α-reductase that plays a major role in the conversion of testosterone into dihydrotestosterone. Moreover, bee venom stimulated proliferation of hDPCs and several growth factors (insulin-like growth factor 1 receptor (IGF-1R), vascular endothelial growth factor (VEGF), fibroblast growth factor (FGF)2 and 7) in bee venom-treated hDPCs dose dependently compared with the control group. In conclusion, bee venom is a potentially potent 5α-reductase inhibitor and hair growth promoter. PMID:27040904

  7. Effects of the Bee Venom Herbal Acupuncture on the Neurotransmitters of the Rat Brain Cortex

    Directory of Open Access Journals (Sweden)

    Hyoung-Seok Yun

    2001-02-01

    Full Text Available In order to study the effects of bee venom Herbal Acupuncture on neurotransmitters in the rat brain cortex, herbal acupuncture with bee venom group and normal saline group was performed at LI4 bilaterally of the rat. the average optical density of neurotransmitters from the cerebral cortex was analysed 30 minutes after the herbal aqupuncture, by the immunohistochemistry. The results were as follows: 1. The density of NADPH-diaphorase in bee venom group was increased significantly at the motor cortex, visual cortex, auditory cortex, cingulate cortex, retrosplenial cortex and perirhinal cortex compared to the normal saline group. 2. The average optical density of vasoactive intestinal peptide in bee venom group had significant changes at the insular cortex, retrosplenial cortex and perirhinal cortex, compared to the normal saline group. 3. The average optical density of neuropeptide-Y in bee venom group increased significantly at the visual cortex and cingulate cortex, compared to the normal saline group.

  8. Report on the changes of LD50 of Bee venom Herbal Acupuncture

    Directory of Open Access Journals (Sweden)

    Ki Rok Kwon

    2005-02-01

    Full Text Available Objectives : This experiment was conducted to reevaluate LD50 of Korean bee venom acupuncture as many changes have occurred over the years. Methods : ICR mice were used as the experiment animals and bee venom acupuncture was manufactured under the protocols of Korean Institute of herbal Acupuncture. Based on the previous reports, experiment was divided into pre and main sections. Results : 1. Presumed LD50 value is at 5.25mg/kg. 2. Deaths of experiment animals occurred within 48 hours. 3. Reduced toxicity of the bee venom acupuncture is likely to be the results of more refined manufacturing process and production. Conclusion : Comparing with the values of the previous results, toxicity of the bee venom acupuncture showed significant changes and more accurate findings on LD50 value must be accomplished to lead further studies on the bee venom acupuncture.

  9. Bee venom hyaluronidase is homologous to a membrane protein of mammalian sperm.

    OpenAIRE

    Gmachl, M; Kreil, G

    1993-01-01

    The venom of honeybees, Apis mellifera, contains several biologically active peptides and two enzymes, one of which is a hyaluronidase. By using degenerate oligonucleotides derived from the amino-terminal sequence of this hyaluronidase reported by others, clones encoding the precursor for this enzyme could be isolated from a cDNA library prepared from venom glands of worker bees. The deduced amino acid sequence showed that bee venom hyaluronidase is a polypeptide composed of 349 amino acids c...

  10. Mastoparan, a wasp venom, and melittin, a bee venom, enhance phagocytosis in mouse peritoneal macrophages

    OpenAIRE

    一ノ瀬, 充行; 廣田, 秋彦

    1998-01-01

    To characterize the direct effects of wasp and bee venom peptides on mouse peritoneal macrophages, the effects of mastoparan and melittin on phagocytosis were examined. Mastoparan induced an enhancement of phagocytosis in a dose-dependnt manner up to 2x10^M. Melittin enhanced phagocytosis at lower concentrations, but the dose-response curve was bell-shaped. Even in Ca^-and Mg^-free solutions containing EGTA, which reduced extracellular Ca^, and BAPTA, which reduced intracellular free Ca^, pha...

  11. Expression of enzymatically inactive wasp venom phospholipase A1 in Pichia pastoris

    DEFF Research Database (Denmark)

    Borodina, Irina; Jensen, Bettina M; Wagner, Tim; Hachem, Maher A; Søndergaard, Ib; Poulsen, Lars K

    2011-01-01

    in yeast Pichia pastoris, which can give high yields of correctly folded protein on defined minimal medium and secretes relatively few native proteins simplifying purification.Residual amounts of enzymatically active phospholipase A1 could be expressed, but the venom protein had a deleterious effect...

  12. Expression of enzymatically inactive wasp venom phospholipase A1 in Pichia pastoris

    DEFF Research Database (Denmark)

    Borodina, Irina; Jensen, Bettina M.; Wagner, Tim; Abou Hachem, Maher; Søndergaard, Ib; Poulsen, Lars Kærgaard

    in yeast Pichia pastoris, which can give high yields of correctly folded protein on defined minimal medium and secretes relatively few native proteins simplifying purification. Residual amounts of enzymatically active phospholipase A1 could be expressed, but the venom protein had a deleterious effect...

  13. Expression of Enzymatically Inactive Wasp Venom Phospholipase A1 in Pichia pastoris

    DEFF Research Database (Denmark)

    Borodina, Irina; Jensen, Bettina M.; Wagner, Tim; Abou Hachem, Maher; Søndergaard, Ib; Poulsen, Lars Kærgaard

    2011-01-01

    in yeast Pichia pastoris, which can give high yields of correctly folded protein on defined minimal medium and secretes relatively few native proteins simplifying purification.Residual amounts of enzymatically active phospholipase A1 could be expressed, but the venom protein had a deleterious effect...

  14. Honeybee Venom Proteome Profile of Queens and Winter Bees as Determined by a Mass Spectrometric Approach

    Directory of Open Access Journals (Sweden)

    Ellen L. Danneels

    2015-10-01

    Full Text Available Venoms of invertebrates contain an enormous diversity of proteins, peptides, and other classes of substances. Insect venoms are characterized by a large interspecific variation resulting in extended lists of venom compounds. The venom composition of several hymenopterans also shows different intraspecific variation. For instance, venom from different honeybee castes, more specifically queens and workers, shows quantitative and qualitative variation, while the environment, like seasonal changes, also proves to be an important factor. The present study aimed at an in-depth analysis of the intraspecific variation in the honeybee venom proteome. In summer workers, the recent list of venom proteins resulted from merging combinatorial peptide ligand library sample pretreatment and targeted tandem mass spectrometry realized with a Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS/MS. Now, the same technique was used to determine the venom proteome of queens and winter bees, enabling us to compare it with that of summer bees. In total, 34 putative venom toxins were found, of which two were never described in honeybee venoms before. Venom from winter workers did not contain toxins that were not present in queens or summer workers, while winter worker venom lacked the allergen Api m 12, also known as vitellogenin. Venom from queen bees, on the other hand, was lacking six of the 34 venom toxins compared to worker bees, while it contained two new venom toxins, in particularly serine proteinase stubble and antithrombin-III. Although people are hardly stung by honeybees during winter or by queen bees, these newly identified toxins should be taken into account in the characterization of a putative allergic response against Apis mellifera stings.

  15. Honeybee venom proteome profile of queens and winter bees as determined by a mass spectrometric approach.

    Science.gov (United States)

    Danneels, Ellen L; Van Vaerenbergh, Matthias; Debyser, Griet; Devreese, Bart; de Graaf, Dirk C

    2015-11-01

    Venoms of invertebrates contain an enormous diversity of proteins, peptides, and other classes of substances. Insect venoms are characterized by a large interspecific variation resulting in extended lists of venom compounds. The venom composition of several hymenopterans also shows different intraspecific variation. For instance, venom from different honeybee castes, more specifically queens and workers, shows quantitative and qualitative variation, while the environment, like seasonal changes, also proves to be an important factor. The present study aimed at an in-depth analysis of the intraspecific variation in the honeybee venom proteome. In summer workers, the recent list of venom proteins resulted from merging combinatorial peptide ligand library sample pretreatment and targeted tandem mass spectrometry realized with a Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS/MS). Now, the same technique was used to determine the venom proteome of queens and winter bees, enabling us to compare it with that of summer bees. In total, 34 putative venom toxins were found, of which two were never described in honeybee venoms before. Venom from winter workers did not contain toxins that were not present in queens or summer workers, while winter worker venom lacked the allergen Api m 12, also known as vitellogenin. Venom from queen bees, on the other hand, was lacking six of the 34 venom toxins compared to worker bees, while it contained two new venom toxins, in particularly serine proteinase stubble and antithrombin-III. Although people are hardly stung by honeybees during winter or by queen bees, these newly identified toxins should be taken into account in the characterization of a putative allergic response against Apis mellifera stings. PMID:26529016

  16. Static magnetic field changes the activity of venom phospholipase of Vipera Lebetina snakes

    International Nuclear Information System (INIS)

    The effect of the static magnetic field (SMF) on the phospholipid activity of the class-A snake venom is studied. The Vipera Lebetina snake venom was subjected during 10 days to 30 minute impact of the CMF daily. It is established that increase in the phospholipase A1 and A2 approximately by 21 and 32 % correspondingly and in the phosphodiesterase C - by 33 % was observed. The decrease in the total protein level of the snake venom by 31.6 ± 2.2 % was noted thereby. It may be assumed that the described phospholipase and phosphoesterase changes may lead to essential shifts in the total metabolic activity of cells and organism as a whole. The activity index of these ferments may serve as an indicator of changes in the environmental magnetic field

  17. Purification of Peptide Components including Melittin from Bee Venom using gel filtration chromatography and propionic acid/urea polyacrylamide gel electrophoresis

    Directory of Open Access Journals (Sweden)

    Young Chon Choi

    2006-06-01

    Full Text Available Objectives : This study was conducted to carry out Purification of Melittin and other peptide components from Bee Venom using gel filtration chromatography and propionic acid/urea polyacrylamide gel electrophoresis Methods : Melittin and other peptide components were separated from bee venom by using gel filtration chromatography on Sephadex G-50 column in 0.05M ammonium acetate buffer. Results : Melittin and other peptide components were separated from bee venom by using gel filtration chromatography on Sephadex G-50 column in 0.05M ammonium acetate buffer. The fractions obtained from gel filtration chromatography was analyzed by using SDS-PAGE and propionic acid/urea polyacrylamide gel electrophoresis. The melittin obtained from the gel filtration contained residual amount of phospholipase A2 and a protein with molecular weight of 6,000. The contaminating proteins were removed by the second gel filtration chromatography. Conclusion : Gel filtration chromatography and propionic acid/urea polyacrylamide gel electrophoresis are useful to separate peptide components including melittin from bee venom.

  18. The first report on coagulation and phospholipase A2 activities of Persian Gulf lionfish, Pterois russelli, an Iranian venomous fish.

    Science.gov (United States)

    Memar, Bahareh; Jamili, Shahla; Shahbazzadeh, Delavar; Bagheri, Kamran Pooshang

    2016-04-01

    Pterois russelli is a venomous fish belonging to scorpionidae family. Regarding to high significance value for tracing potential therapeutic molecules and special agents from venomous marine creatures, the present study was aimed to characterization of the Persian Gulf lionfish venom. Proteolytic, phospholipase, hemolytic, coagulation, edematogenic and dermonecrotic activities were determined for extracted venom. The LD50 of P. russelli venom was determined by intravenous injection in white Balb/c mice. Phospholipase A2 activity was recorded at 20 μg of total venom. Coagulation activity on human plasma was shown by Prothrombin Time (PT) and activated Partial Thromboplastin Time (APTT) assays and coagulation visualized after 7 and 14 s respectively for 60 μg of crude venom. LD50 was calculated as 10.5 mg/kg. SDS-PAGE revealed the presence of major and minor protein bands between 6 and 205 kDa. Different amounts of crude venom ranged from 1.87 to 30 μg showed proteolytic activity on casein. The highest edematic activity was detected at 20 μg. Our findings showed that the edematic activity was dose dependent and persisted for 48 h after injection. The crude venom did not induce dermonecrotic activity on rabbit skin and showed no hemolytic activity on human, mouse and rabbit erythrocytes. This is the first report for phospholipase A2 and coagulation activity in venomous fish and venomous marine animals respectively. Proteolytic activity of P. russelli venom is in accordance with the other genara of scorpionidae family. According to venom activity on intrinsic and extrinsic coagulation pathways, lionfish venom would be contained an interesting pharmaceutical agent. This study is pending to further characterization of phospholipase A2, coagulation, and protease activities and also in vivo activity on animal model of surface and internal bleeding. PMID:26853495

  19. Bee venom and its component apamin as neuroprotective agents in a Parkinson disease mouse model.

    Science.gov (United States)

    Alvarez-Fischer, Daniel; Noelker, Carmen; Vulinović, Franca; Grünewald, Anne; Chevarin, Caroline; Klein, Christine; Oertel, Wolfgang H; Hirsch, Etienne C; Michel, Patrick P; Hartmann, Andreas

    2013-01-01

    Bee venom has recently been suggested to possess beneficial effects in the treatment of Parkinson disease (PD). For instance, it has been observed that bilateral acupoint stimulation of lower hind limbs with bee venom was protective in the acute 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) mouse model of PD. In particular, a specific component of bee venom, apamin, has previously been shown to have protective effects on dopaminergic neurons in vitro. However, no information regarding a potential protective action of apamin in animal models of PD is available to date. The specific goals of the present study were to (i) establish that the protective effect of bee venom for dopaminergic neurons is not restricted to acupoint stimulation, but can also be observed using a more conventional mode of administration and to (ii) demonstrate that apamin can mimic the protective effects of a bee venom treatment on dopaminergic neurons. Using the chronic mouse model of MPTP/probenecid, we show that bee venom provides sustained protection in an animal model that mimics the chronic degenerative process of PD. Apamin, however, reproduced these protective effects only partially, suggesting that other components of bee venom enhance the protective action of the peptide. PMID:23637888

  20. Primary structure and pathological study of phospholipase A2-I from Agkistrodon bilineatus (common cantil) venom.

    Science.gov (United States)

    Komori, Yumiko; Ohara, Akihito; Nikai, Toshiaki

    2002-05-01

    Phospholipase A2-I (PLA2-I) was isolated from Agkistrodon bilineatus venom by Nikai (Nikai et al., 1993). The amino acid sequence of the phospholipase A2-I was determined by the Edman sequencing procedure of peptides derived from digests utilizing cyanogen bromide, clostripain, metalloendopeptidase, chymotrypsin, and Staphylococcus aureus V8 protease. In the reduced state, purified phospholipase A2's molecular weight was determined to be 14,000 as demonstrated by sodium dodecylsulfate-polyacrylamide gel electrophoresis. Purified PLA2-I also contained 1 mol of Ca per mol of protein and consists of 123 amino acid residues resulting in a calculated molecular weight of 14,133. Both phospholipase and lethal activities were found to be inhibited by bromophenacyl bromide, suggesting that the histidine residue is involved in this activity. Also there was an increase in the creatine kinase activity of mice serum, which is an indicator that PLA2-I is involved in muscle damage. PMID:12009114

  1. Bee Venom Protects against Rotenone-Induced Cell Death in NSC34 Motor Neuron Cells.

    Science.gov (United States)

    Jung, So Young; Lee, Kang-Woo; Choi, Sun-Mi; Yang, Eun Jin

    2015-09-01

    Rotenone, an inhibitor of mitochondrial complex I of the mitochondrial respiratory chain, is known to elevate mitochondrial reactive oxygen species and induce apoptosis via activation of the caspase-3 pathway. Bee venom (BV) extracted from honey bees has been widely used in oriental medicine and contains melittin, apamin, adolapin, mast cell-degranulating peptide, and phospholipase A₂. In this study, we tested the effects of BV on neuronal cell death by examining rotenone-induced mitochondrial dysfunction. NSC34 motor neuron cells were pretreated with 2.5 μg/mL BV and stimulated with 10 μM rotenone to induce cell toxicity. We assessed cell death by Western blotting using specific antibodies, such as phospho-ERK1/2, phospho-JNK, and cleaved capase-3 and performed an MTT assay for evaluation of cell death and mitochondria staining. Pretreatment with 2.5 μg/mL BV had a neuroprotective effect against 10 μM rotenone-induced cell death in NSC34 motor neuron cells. Pre-treatment with BV significantly enhanced cell viability and ameliorated mitochondrial impairment in rotenone-treated cellular model. Moreover, BV treatment inhibited the activation of JNK signaling and cleaved caspase-3 related to cell death and increased ERK phosphorylation involved in cell survival in rotenone-treated NSC34 motor neuron cells. Taken together, we suggest that BV treatment can be useful for protection of neurons against oxidative stress or neurotoxin-induced cell death. PMID:26402700

  2. Bee Venom Protects against Rotenone-Induced Cell Death in NSC34 Motor Neuron Cells

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    So Young Jung

    2015-09-01

    Full Text Available Rotenone, an inhibitor of mitochondrial complex I of the mitochondrial respiratory chain, is known to elevate mitochondrial reactive oxygen species and induce apoptosis via activation of the caspase-3 pathway. Bee venom (BV extracted from honey bees has been widely used in oriental medicine and contains melittin, apamin, adolapin, mast cell-degranulating peptide, and phospholipase A2. In this study, we tested the effects of BV on neuronal cell death by examining rotenone-induced mitochondrial dysfunction. NSC34 motor neuron cells were pretreated with 2.5 μg/mL BV and stimulated with 10 μM rotenone to induce cell toxicity. We assessed cell death by Western blotting using specific antibodies, such as phospho-ERK1/2, phospho-JNK, and cleaved capase-3 and performed an MTT assay for evaluation of cell death and mitochondria staining. Pretreatment with 2.5 μg/mL BV had a neuroprotective effect against 10 μM rotenone-induced cell death in NSC34 motor neuron cells. Pre-treatment with BV significantly enhanced cell viability and ameliorated mitochondrial impairment in rotenone-treated cellular model. Moreover, BV treatment inhibited the activation of JNK signaling and cleaved caspase-3 related to cell death and increased ERK phosphorylation involved in cell survival in rotenone-treated NSC34 motor neuron cells. Taken together, we suggest that BV treatment can be useful for protection of neurons against oxidative stress or neurotoxin-induced cell death.

  3. Risk associated with bee venom therapy: a systematic review and meta-analysis.

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    Jeong Hwan Park

    Full Text Available The safety of bee venom as a therapeutic compound has been extensively studied, resulting in the identification of potential adverse events, which range from trivial skin reactions that usually resolve over several days to life-threating severe immunological responses such as anaphylaxis. In this systematic review, we provide a summary of the types and prevalence of adverse events associated with bee venom therapy.We searched the literature using 12 databases from their inception to June 2014, without language restrictions. We included all types of clinical studies in which bee venom was used as a key intervention and adverse events that may have been causally related to bee venom therapy were reported.A total of 145 studies, including 20 randomized controlled trials, 79 audits and cohort studies, 33 single-case studies, and 13 case series, were evaluated in this review. The median frequency of patients who experienced adverse events related to venom immunotherapy was 28.87% (interquartile range, 14.57-39.74 in the audit studies. Compared with normal saline injection, bee venom acupuncture showed a 261% increased relative risk for the occurrence of adverse events (relative risk, 3.61; 95% confidence interval, 2.10 to 6.20 in the randomized controlled trials, which might be overestimated or underestimated owing to the poor reporting quality of the included studies.Adverse events related to bee venom therapy are frequent; therefore, practitioners of bee venom therapy should be cautious when applying it in daily clinical practice, and the practitioner's education and qualifications regarding the use of bee venom therapy should be ensured.

  4. Identification of hyaluronidase and phospholipase B in Lachesis muta rhombeata venom.

    Science.gov (United States)

    Wiezel, Gisele A; dos Santos, Patty K; Cordeiro, Francielle A; Bordon, Karla C F; Selistre-de-Araújo, Heloisa S; Ueberheide, Beatrix; Arantes, Eliane C

    2015-12-01

    Hyaluronidases contribute to local and systemic damages after envenoming, since they act as spreading factors cleaving the hyaluronan presents in the connective tissues of the victim, facilitating the diffusion of venom components. Although hyaluronidases are ubiquitous in snake venoms, they still have not been detected in transcriptomic analysis of the Lachesis venom gland and neither in the proteome of its venom performed previously. This work purified a hyaluronidase from Lachesis muta rhombeata venom whose molecular mass was estimated by SDS-PAGE to be 60 kDa. The hyaluronidase was more active at pH 6 and 37 °C when salt concentration was kept constant and more active in the presence of 0.15 M monovalent ions when the pH was kept at 6. Venom was fractionated by reversed-phase liquid chromatography (RPLC). Edman sequencing after RPLC failed to detect hyaluronidase, but identified a new serine proteinase isoform. The hyaluronidase was identified by mass spectrometry analysis of the protein bands in SDS-PAGE. Additionally, phospholipase B was identified for the first time in Lachesis genus venom. The discovery of new bioactive molecules might contribute to the design of novel drugs and biotechnology products as well as to development of more effective treatments against the envenoming. PMID:26335358

  5. Purification of a phospholipase A2 from Daboia russelii siamensis venom with anticancer effects

    OpenAIRE

    Khunsap, Suchitra; Pakmanee, Narumol; Khow, Orawan; Chanhome, Lawan; Sitprija, Visith; Suntravat, Montamas; Lucena, Sara E; Perez, John C.; Sánchez, Elda E

    2011-01-01

    Venom phospholipases A2 (PLA2) are associated with neurotoxic, myotoxic, cardiotoxic, platelet aggregation, and edema activities. A PLA2 (Drs-PLA2) was purified from Daboia russelii siamensis venom by a two-step purification procedure consisting of size-exclusion, followed by anion exchange high performance liquid chromatography (HPLC). The molecular weight of the Drs-PLA2 was 13,679Da, which was determined by MALDI-TOF mass spectrometry. Its N-terminal amino acid sequence was homologous to b...

  6. A Clinical Study of Bee Venom Acupuncture Therapy on External Epicondylitis

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    Kyung-Tae Kim

    2006-06-01

    Full Text Available Objective : This study was to evaluate the effectiveness of Bee Venom acupuncture therapy on external epicondylitis. Methods : We divided chronic arthritis of ankle patient into 2 groups; one group combined bee venom acupuncture therapy and acupuncture therapy, another group was only acupuncture therapy. To estimate the effectiveness of treatment that applied for two groups, we used visual analog scale(VAS. We compared the VAS score of two groups statistically. Results : 1. As a result of evaluation by using visual analog scale(VAS, treatment score at final was marked more higher than score before treatment on each groups. 2. treatment at final, acupuncture and bee venom acupuncture therapy group had significant result on visual analog scale(VAS compared with acupuncture therapy group. Conclusion : Bee Venom acupuncture therapy can be used with acupuncture therapy for highly effective treatment for external epicondylitis.

  7. Clinical Report on the Treatment of 70 Molluscum Contagiosum Cases using Sweet Bee venom Pharmacopunture

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    Sa Han Park

    2008-06-01

    Full Text Available Objectives : This study obserbed the efficiency of Sweet Bee Venom pharmacopuncture on the treatment of 70 Molluscum Contagiosum cases. Methods : 70 patients admitted for Molluscum at Love Blossoming Oriental medicine clinic from February 2007 to October 2007 were administered with Sweet Bee Venom Pharmacopuncture and measured an analyzed changes in symptoms. Results : 1. Regardless of age or duration of Molluscum Contagiosum, all 70 patients showed improvement. 2. Recurrence of Molluscum Contagiosum was not noticeable when treated with Sweet Bee Venom Pharmacopuncture, and the duration of treatment was significantly shorter than treation with conventional allopathic ointment. Conclusion : Based on above findings, we can deduce Sweet Bee Venom Pharmacopuncture has superior anti-viral effects on th pox virus of Molluscum Contagiosum.

  8. The Comparison of Effective between Acupuncture and Bee Venom Acupuncture on the Treatment of Acute Lumbar Herniation of Intervertebral Disc

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    Chang So-Young

    2006-06-01

    Full Text Available Objective : Herniation of Intervertebral Disc(HIVD is the most common disease causing low back pain. Acupuncture and Bee Venom Acupuncture has been used for treatment of HIVD. This study is to investigate the effective of Bee Venom Acupuncture for HIVD. Methods : We researched 18 patients who were diagnosed by CT and MRI as having HIVD, and treated them Acupuncture only or Acupuncture and Bee Venom Acupuncture. We compared the VAS and ROM angle of two groups. Results & Conclusions : 1. In admission date, no significant improvement between Acupuncture group and Bee Venom Acupuncture group 2. In variation of flexion and extension, Bee Venom Acupuncture group shows statistically significant improvement 3. In VAS, Bee Venom Acupuncture group shows statistically significant improvement for 1 week and discharge day

  9. Purification of an acidic phospholipase A2 from Bothrops lanceolatus (fer de lance) venom: molecular and enzymatic properties.

    Science.gov (United States)

    de Araújo, A L; Radvanyi, F; Bon, C

    1994-09-01

    The acidic phospholipase A2 from Bothrops lanceolatus venom has been purified by gel filtration on Sephadex G-50 and ion exchange chromatography on CM-cellulose. Analysis by FPLC on Mono-Q column of the purified phospholipase A2 indicated that it is a mixture of several isoenzymes. The two major isoforms consist of a single polypeptide chain with mol. wts of 14,500 and 15,000, which slightly differ in their isoelectric point (4.9 and 5.3) and amino acid composition. However, enzymatic and pharmacological properties of the various isoenzymes are identical. The phospholipase from B. lanceolatus venom is characterized by a progressive increase in the rate of hydrolysis when enzymatic activity is determined with crude egg yolk as substrate in the absence of detergent. This phenomenon, which is not observed with mixed micelles of lecithin-detergent, is not due to the presence of a phospholipase A2 inhibitor in the venom, as previously suggested by several investigators in the case of other Bothrops and Cobra venoms. It is rather a catalytic characteristics of B. lanceolatus venom phospholipase, the enzymatic activity of which depends on the physical state of phospholipids. Bothrops lanceolatus acidic phospholipase A2 is non-toxic. PMID:7801343

  10. Bee venom acupuncture alleviates trimellitic anhydride-induced atopic dermatitis-like skin lesions in mice

    OpenAIRE

    Sur, Bongjun; Lee, Bombi; Yeom, Mijung; Hong, Ju-Hee; Kwon, Sunoh; Kim, Seung-Tae; Lee, Hyang Sook; Park, Hi-Joon; Lee, Hyejung; Hahm, Dae-Hyun

    2016-01-01

    Background Bee venom acupuncture (BVA), a novel type of acupuncture therapy in which purified bee venom is injected into the specific acupuncture point on the diseased part of the body, is used primarily for relieving pain and other musculoskeletal symptoms. In the present study, therapeutic potential of BVA to improve atopic dermatitis, a representative allergic dysfunction, was evaluated in the mouse model of trimellitic anhydride (TMA)-induced skin impairment. Methods Mice were treated wit...

  11. Systemic Immediate Hypersensitive Reactions after Treatment with Sweet Bee Venom: A Case Report

    OpenAIRE

    NaYoung Jo; JeongDu Roh

    2015-01-01

    Objectives: A previous study showed that bee venom (BV) could cause anaphylaxis or other hypersensitivity reactions. Although hypersensitivity reactions due to sweet bee venom (SBV) have been reported, SBV has been reported to be associated with significantly reduced sensitization compared to BV. Although no systemic immediate hypersensitive response accompanied by abnormal vital signs has been reported with respect to SBV, we report a systemic immediate hypersensitive response that we experi...

  12. An Overview of Bee Venom Acupuncture in the Treatment of Arthritis

    OpenAIRE

    Jae-Dong Lee; Hi-Joon Park; Younbyoung Chae; Sabina Lim

    2005-01-01

    Bee venom acupuncture (BVA), as a kind of herbal acupuncture, exerts not only pharmacological actions from the bioactive compounds isolated from bee venom but also a mechanical function from acupuncture stimulation. BVA is growing in popularity, especially in Korea, and is used primarily for pain relief in many kinds of diseases. We aimed to summarize and evaluate the available evidence of BVA for rheumatoid arthritis and osteoarthritis. Computerized literature searches for experimental st...

  13. Effectiveness of acupuncture and bee venom acupuncture in idiopathic Parkinson's disease.

    Science.gov (United States)

    Cho, Seung-Yeon; Shim, So-Ra; Rhee, Hak Young; Park, Hi-Joon; Jung, Woo-Sang; Moon, Sang-Kwan; Park, Jung-Mi; Ko, Chang-Nam; Cho, Ki-Ho; Park, Seong-Uk

    2012-09-01

    This study aimed to explore the effectiveness of both acupuncture and bee venom acupuncture as adjuvant therapies for idiopathic Parkinson's disease. We recruited 43 adults with idiopathic Parkinson's disease who had been on a stable dose of antiparkinsonian medication for at least 1 month. They were randomly assigned to 1 of 3 groups: acupuncture, bee venom acupuncture, or control. All participants were assessed using the Unified Parkinson's Disease Rating Scale, the Parkinson's Disease Quality of Life Questionnaire, the Beck Depression Inventory, the Berg Balance Scale, and the time and number of steps required to walk 30 m. Treatment groups underwent stimulation of 10 acupuncture points using acupuncture or bee venom acupuncture twice a week for 8 weeks. The initial assessment was repeated at the completion of treatment. The control group did not receive any treatment. Participants in the bee venom acupuncture group showed significant improvement on the Unified Parkinson's Disease Rating Scale (total score, as well as parts II and III individually), the Berg Balance Scale, and the 30 m walking time. When compared to the control group, the bee venom acupuncture group experienced significantly greater improvement on the Unified Parkinson's Disease Rating Scale. In the acupuncture group, the Unified Parkinson's Disease Rating Scale (part III and total scores) and the Beck Depression Inventory showed significant improvement. The control group showed no significant changes in any outcome after 8 weeks. In this pilot study, both acupuncture and bee venom acupuncture showed promising results as adjuvant therapies for Parkinson's disease. PMID:22632852

  14. The Clinical Study on a Case of Transverse Myelitis With Bee Venom and Hominis Placenta Herbal Acupuncture

    OpenAIRE

    Park Min-ho; Lim Sung-taek; Choi Seok-woo

    2005-01-01

    Objective : This study was performed to evaluate the treatment of acupuncture therapy including Bee Venom and Hominis Placenta herbal acupuncture on the patient with Transverse myelitis. Methods : We treated the patient with Transverse myelitis by Bee Venom herbal acupuncture at beginning, since then we treated him adding to Hominis Placenta herbal acupuncture. Conclusions : The patient was effectively reduced symptoms with Bee Venom herbal acupuncture, since then he get more effective ...

  15. The Use of Chicken Igy in a Double Antibody Sandwich Elisa for the Quantification of Melittin in Bee Venom and Bee Venom Melittin Content in Cosmetics

    OpenAIRE

    Suh Lindsey Y. K.; Kartoon Tayabaa; Gujral Naiyana; Yoon Youngmee; Suh Joo Won; Sunwoo Hoon

    2015-01-01

    Two enzyme-linked immunosorbent assay (ELISA) - based detection systems: indirect competitive ELISA and biotinylated double antibody sandwich ELISA (DAS-ELISA) were developed to determine the melittin concentration in honeybee (Apis mellifera) venom and the melittin concentration in cosmetics which contain bee venom. The indirect competitive ELISA employed chicken anti-melittin IgY. The biotinylated DAS-ELISA employed anti-melittin monoclonal antibody (MAb) and biotinylated anti-melittin IgY....

  16. Effect of Bee Venom Pharmacopuncture Therapy on the severe pain back of the ear in patient diagnosed with Bell's palsy

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    Oh Hyun-Jun

    2009-09-01

    Full Text Available Objective : This study was to report Bell's palsy patients with severe pain back of the ear treated by Bee Venom Pharmacopuncture therapy. Methods : The patients was treated by Bee Venom Pharmacopuncture therapy to relieve the severe pain back of the ear. Visual Analog Scale(VAS was used as an outcome measurement. Results : After Bee Venom Pharmacopuncture therapy, VAS were decreased at all case. Conclusion : Bee Venom Pharmacopuncture therapy can be available for relieving severe pain back of the ear even inducing insomnia.

  17. The Clinical Study on a Case of Transverse Myelitis With Bee Venom and Hominis Placenta Herbal Acupuncture

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    Park Min-ho

    2005-06-01

    Full Text Available Objective : This study was performed to evaluate the treatment of acupuncture therapy including Bee Venom and Hominis Placenta herbal acupuncture on the patient with Transverse myelitis. Methods : We treated the patient with Transverse myelitis by Bee Venom herbal acupuncture at beginning, since then we treated him adding to Hominis Placenta herbal acupuncture. Conclusions : The patient was effectively reduced symptoms with Bee Venom herbal acupuncture, since then he get more effective improvement of symptoms by adding Hominis Placenta herbal acupuncture. Therefore we are able to expect Bee venom and Hominis Placenta herbal acupuncture will be more effective than simply acupuncture on the patient with Transverse myelitis.

  18. Therapeutic Effects of Bee Venom on Immunological and Neurological Diseases

    Science.gov (United States)

    Hwang, Deok-Sang; Kim, Sun Kwang; Bae, Hyunsu

    2015-01-01

    Bee Venom (BV) has long been used in Korea to relieve pain symptoms and to treat inflammatory diseases, such as rheumatoid arthritis. The underlying mechanisms of the anti-inflammatory and analgesic actions of BV have been proved to some extent. Additionally, recent clinical and experimental studies have demonstrated that BV and BV-derived active components are applicable to a wide range of immunological and neurodegenerative diseases, including autoimmune diseases and Parkinson’s disease. These effects of BV are known to be mediated by modulating immune cells in the periphery, and glial cells and neurons in the central nervous system. This review will introduce the scientific evidence of the therapeutic effects of BV and its components on several immunological and neurological diseases, and describe their detailed mechanisms involved in regulating various immune responses and pathological changes in glia and neurons. PMID:26131770

  19. Bee Venom for the Treatment of Parkinson Disease – A Randomized Controlled Clinical Trial

    Science.gov (United States)

    Hartmann, Andreas; Müllner, Julia; Meier, Niklaus; Hesekamp, Helke; van Meerbeeck, Priscilla; Habert, Marie-Odile; Kas, Aurélie; Tanguy, Marie-Laure; Mazmanian, Merry; Oya, Hervé; Abuaf, Nissen; Gaouar, Hafida; Salhi, Sabrina; Charbonnier-Beaupel, Fanny; Fievet, Marie-Hélène; Galanaud, Damien; Arguillere, Sophie; Roze, Emmanuel; Degos, Bertrand; Grabli, David; Lacomblez, Lucette; Hubsch, Cécile; Vidailhet, Marie; Bonnet, Anne-Marie

    2016-01-01

    In the present study, we examined the potential symptomatic and/or disease-modifying effects of monthly bee venom injections compared to placebo in moderatly affected Parkinson disease patients. We conducted a prospective, randomized double-blind study in 40 Parkinson disease patients at Hoehn & Yahr stages 1.5 to 3 who were either assigned to monthly bee venom injections or equivalent volumes of saline (treatment/placebo group: n = 20/20). The primary objective of this study was to assess a potential symptomatic effect of s.c. bee venom injections (100 μg) compared to placebo 11 months after initiation of therapy on United Parkinson’s Disease Rating Scale (UPDRS) III scores in the « off » condition pre-and post-injection at a 60 minute interval. Secondary objectives included the evolution of UPDRS III scores over the study period and [123I]-FP-CIT scans to evaluate disease progression. Finally, safety was assessed by monitoring specific IgE against bee venom and skin tests when necessary. After an 11 month period of monthly administration, bee venom did not significantly decrease UPDRS III scores in the « off » condition. Also, UPDRS III scores over the study course, and nuclear imaging, did not differ significantly between treatment groups. Four patients were excluded during the trial due to positive skin tests but no systemic allergic reaction was recorded. After an initial increase, specific IgE against bee venom decreased in all patients completing the trial. This study did not evidence any clear symptomatic or disease-modifying effects of monthly bee venom injections over an 11 month period compared to placebo using a standard bee venom allergy desensitization protocol in Parkinson disease patients. However, bee venom administration appeared safe in non-allergic subjects. Thus, we suggest that higher administration frequency and possibly higher individual doses of bee venom may reveal its potency in treating Parkinson disease. Trial Registration

  20. Amino acid sequence of phospholipase A/sub 2/-. cap alpha. from the venom of Crotalus adamanteus

    Energy Technology Data Exchange (ETDEWEB)

    Heinrikson, R.L.; Krueger, E.T.; Keim, P.S.

    1977-07-25

    The complete amino acid sequence of Crotalus adamanteus venom phospholipase A/sub 2/-..cap alpha.. has been determined by analysis of the five tryptic peptides from the citraconylated, reduced, and S-(/sup 14/C)carboxamidomethylated enzyme. Earlier studies provided the information necessary to align the tryptic fragments so that secondary cleavage procedures to establish overlaps were unnecessary. The subunit in the phospholipase A/sub 2/-..cap alpha.. dimer is a single polypeptide chain containing 122 amino acids and seven disulfide bonds. The histidine residue implicated in the active site of mammalian phospholipases is at position 47 in the C. adamanteus enzyme and is located in a domain of the molecule which is highly homologous in sequence with corresponding regions of phospholipases from a variety of venom and pancreatic sources. Comparative sequence analysis has revealed insights with regard to the function and evolution of phospholipases A/sub 2/. Primary structural relationships observed among the snake venom enzymes parallel the phylogenetic classification of the venomous reptiles from which they were derived. It is proposed that phospholipases A/sub 2/ of this general type be divided into two groups depending upon the presence or absence of distinctive structural features elucidated in this study.

  1. Melittin and hyaluronidase compound derived from bee venom for the treatment of multiple sclerosis

    Directory of Open Access Journals (Sweden)

    Nazaninalsadat Seyed Khoei

    2009-05-01

    Full Text Available "nMultiple sclerosis (MS is a chronic inflammatory disease of the central nervous system. Among the numerous proposed etiologies, Borrelia burgdorferi (a causative agent of Lyme disease has been associated with MS. Although the current MS therapies decrease the quantity and severity of the attacks, most patients experience various neurologic symptoms obliging them to have recourse to one or more complementary and alternative medicines along with the conventional medical interventions. "nAmong these, bee venom (BV therapy is increasingly used for the treatment of MS; nonetheless no animal or human studies have so far revealed an improvement in the symptoms of MS upon such therapy. Herein, the authors discuss the plausible factors giving rise to the inefficacy of BV in amelioration of MS symptoms, despite its highly anti-inflammatory properties. "nWe hypothesize that BV compound purified of phospholipase A2 that highly contains melittin and hyaluronidase may alleviate the symptoms of MS, directly through anti-inflammatory effects and degradation of hyaluronan accumulated in inflammatory demyelinating lesions, and indirectly by inhibitory effects on Borrelia burgdorferi. Thus, upon this hypothesis, we suggest that the melittin and hyaluronidase be injected into specific trigger points in the patients diagnosed with MS in randomized clinical trials to assess the efficacy of the proposed modality.

  2. Isolation and biological characterization of a basic phospholipase A2 from Bothrops jararacussu snake venom

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    S.L. Maruñak

    2007-12-01

    Full Text Available A phospholipase A2 has been isolated from Bothrops jararacussu venom from snakes that inhabit the northeast region of Argentina. The present study describes in vivo and in vitro biological activities of phospholipase A2 from B. jararacussu as well as isolation details of its. Venom was obtained by milking of adult snakes which were housing in wood reptile cages of varying dimensions in heated (20-30ºC rooms. Snakes received a weekly diet of mice and water was available ad libitum for drinking and soaking. The enzyme was purified by gel filtration on a Sephadex G-75 column followed by ion exchange chromatography on a SP-Sephadex C25 column. The major peak belonging to proteins was retained in the cation exchanger and then eluted using a concentration gradient of KCl that exhibited phospholipase activity. This basic PLA2 consists of a single polypeptide chain with a molecular mass of 15.6 kDa. It had a high indirect hemolytic activity and produced a significant paw edema reaction in mice. The enzyme showed a low lethality (LD50 148.6 mg when was administered i.p. but exhibited elevated myotoxic effects in vivo by increasing plasma CK activity of injected mice, corroborated results by the histological observations of samples of gastrocnemius muscle. Myonecrosis is the result of intense destruction of muscular fibers that involves local infiltration of inflammatory cells and leads to the highest peak of CK level just after 1 hour mice injection. Moreover, the isolated enzyme showed anticoagulant activity, evaluated on sheep platelet-poor plasma which recalcification time was prolonged after incubation with the isolated phospholipase A2. These findings showed that this phospholipase, isolated by only two simple chromatographic steps, possesses high edematogenic and myotoxic activities. However, despite the low lethal activity, this enzyme would contribute markedly to the pathophysiology of the bothropic envenomation.

  3. Clinical Studies of Sweet Bee Venom to The Effect of Abdominal Fat Accumulation

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    Lim, Chung-San

    2008-06-01

    Full Text Available Objective The purpose of this study was to investigate the effects of Sweet Bee Venom to the abdominal fat accumulation clinically. Methods The 20 healthy women volunteers who showed the notice of this study by the home page of Sangji University were treated with Sweet Bee Venom(SBV during twenty times. To investigate the effects of Sweet Bee Venom of the abdominal fat accumulation, abdominal CT, LFT, Thermography, BMI, Inbody 3.0 etc. were performed during clinical trials. And statistical analysis was carried out the data of 10 volunteers who performed all the schedule of this study. Results Following results were obtained from the clinical studies Sweet Bee Venom showed the effect of decreased the body weight, thickness of abdominal skin and fat layer, BMI, and increased abdominal heat, but they are not showed statistical significant. Conclusions These results suggest that treatment Sweet Bee Venom on the abdomen was effective to decrease fat tissue but for the treatment of obesity was performed with right diet program and exercise.

  4. Molecular Biological Study of Anti-cancer Effects of Bee Venom Aqua-acupuncture

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    Park Chan-Yol

    2000-07-01

    Full Text Available To study anti-cancer effect and molecular biological mechanism of bee venom for aqua-acupuncture, the effects of bee venom on cell viability and apoptosis were analyzed using MTT assay, tryphan blue assay, [3H]thymidine release assay, flow cytometric analysis, and activity of caspase-3 protease activity assay. To explore whether anti-cancer effects of bee venom are associated with the transcriptional control of gene expression, quantitative RT-PCR analysis of apoptosis-related genes was performed. The obtained results are summarized as follows: 1. The MTT assay demonstrated that cell viability was decreased by bee venom in a dose-dependant manner. 2. Significant induction of apoptosis was identified using tryphan blue assay, [3H]thymidine release assay, and flow cytometric analysis of sub G1 fraction. 3. In analysis of caspase-3 protease activity, the activity had increased significantly, in a dose-dependant manner. 4. Quantitative RT-PCR analysis of the apoptosis-related genes showed that Bcl-2 and Bcl-XL were down-regulated whereas Bax was up-regulated by bee venom treatment.

  5. Clinical Studies of Sweet Bee Venom to the Effect of Abdominal Fat Accumulation

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    Chung San, Lim

    2008-06-01

    Full Text Available Objective : Sweet bee venom is made by removing allergen from the bee venom through gel filtration chromatography and propionic acid/urea polyacrylamide gel electrophoresis. The aim of this study was to verify allergy inhibitory action in Sweet Bee Venom(SBV and New Sweet Bee Venom(NSBV removed enzymes and compounds of low molecular weight. Methods : 84 healthy adult men and women were selected through a survey whom had never received the bee venom therapy in the past. The concentration of Normal Saline, SBV and NSBV pharmacopuncture was equally at 0.1mg/mL and the experiment was conducted as the double blind test. Results : Participants of the study was comprised of 63 men and 21 women with the average age of 28.3 years. According to results of pain sense, SBV group showed significant higher score compared with NS group and NSBV group using VAS in treating time. And SBV and NSBV group showed significant higher score compared with NS group after 30 minutes. Other allergic responses were insignificant between the groups. Conclusions : As a result of removed allergen and compounds of low molecular weight, NSBV significantly inhibits pain sense in treating time compared with SBV. This indicates wider and easier application of NSBV for the useful application in clinical treatment. Further comparative studies should be conducted to yield more objective verification.

  6. Correlation of the inhibitory activity of phospholipase A2 snake venom and the antioxidant activity of Colombian plant extracts

    OpenAIRE

    Jaime A PEREAÑEZ; Tatiana Lobo-Echeverri; Benjamin Rojano; Leidy Vargas; Maritza Fernandez; Carlos A GAVIRIA; Vitelbina Núñez

    2010-01-01

    Snakebite continues to be a significant health problem in many countries of Latin America. Even though, there has been an improvement in the antivenom therapy, the local effects caused by myotoxic phospholipases A2 (PLA2) present in the venoms, still persist. In search for alternatives to antagonize the PLA2 activity of Bothrops asper's venom, 36 extracts belonging to seventeen families of vascular plants and bryophytes were screened. A significant inhibition of the enzymatic activity of PLA2...

  7. Isolation and characterization of myotoxic phospholipases A2 from crotalid venoms.

    Science.gov (United States)

    Mebs, D; Samejima, Y

    1986-01-01

    Phospholipases A2 producing myonecrosis when injected i.m. into mice were isolated from venoms of Trimeresurus flavoviridis, Agkistrodon bilineatus, A. c. contortrix, A. c. mokeson, A. p. piscivorus and Bothrops asper by gels filtration on Sephadex G-75 followed by ion-exchange chromatography on CM-cellulose. They are basic enzymes with molecular weights between 14,000 and 15,000 containing 120-129 amino acid residues and exhibit relatively low enzymatic activity when tested on egg yolk suspension. Local myonecrosis is induced even at doses of 1.25 micrograms per mouse. PMID:3705094

  8. Three Valuable Peptides from Bee and Wasp Venoms for Therapeutic and Biotechnological Use: Melittin, Apamin and Mastoparan

    OpenAIRE

    Miguel Moreno; Ernest Giralt

    2015-01-01

    While knowledge of the composition and mode of action of bee and wasp venoms dates back 50 years, the therapeutic value of these toxins remains relatively unexploded. The properties of these venoms are now being studied with the aim to design and develop new therapeutic drugs. Far from evaluating the extensive number of monographs, journals and books related to bee and wasp venoms and the therapeutic effect of these toxins in numerous diseases, the following review focuses on the three most ...

  9. Experimental Studies of quantitative evaluation using HPLC and safety of Bee Venom Acupuncture

    Directory of Open Access Journals (Sweden)

    Seong Bong Jang

    2006-02-01

    Full Text Available Objectives : This study was conducted to carry out quantitative evaluation and safety of Bee Venom Acupuncture. Methods : Content analysis was done using HPLC, measurement of , and histological observations were made on the skin and muscles. Results : 1. According to HPLC analysis, each BVA-1 contained approximately , and BVA-2 contained approximately . But the volume of coating was so minute, slight difference exists between each needle. 2. LD50 of mouse with BVA-1 was 16 counts and this is equivalent to 640 needles/kg, making Bee Venom Acupuncture safe treatment apparatus. 3. Regardless of the number of needles, there was no sign of blood stasis or inflammation detected on the skin and muscle tissues. Conclusion : Above results indicate that the Bee Venom Acupuncture can complement shortcomings of syringe usage as a part of Oriental medicine treatment, but extensive researches should be done for further verification.

  10. The Clinical Study on Bee Venom Acupuncture Treatment on Osteoarthritis of Knee Joint

    Directory of Open Access Journals (Sweden)

    Lim Jeong a

    2005-06-01

    Full Text Available Objective : This study is performed for the purpose of examining into the efficacy of the Bee Venom Acupuncture Treatment for Osteoarthritis of Knee Joint Methods : We investitigated 25 cases of patients with Osteoarthritis of Knee Joint from 1st June 2005 to 13th July 2005. The 25 patients were taken Bee Venom Acupuncture over three times irregularly. Treatment efficiency was monitored through VAS (Visual Analog Scale and improvement degree of the grade of clinical symptoms Conclusion : We brought to the conclusion that the Bee Venom Acupuncture has possibility to be efficient to cure the Osteoarthritis of Knee Joint patients. So we suggest the possibility to use this new remedy for the Osteoarthritis of Knee Joint

  11. THE CHARACTERISTICS OF BIOACTIVE PEPTIDES AND ANTIBACTERIAL ACTIVITY OF HONEY BEE (Apis nigrocincta) SMITH VENOM, ENDEMIC TO SULAWESI

    OpenAIRE

    Mokosuli Yermia Semuel; Rudi Alexander Repi

    2015-01-01

    Apis nigrocincta Smith is a species of honey bee cavity nesting, endemic to Sulawesi. Research that aims to find the composition of the bioactive content of peptides and antibacterial activity of honey bee venom A. nigrocincta Smith has been conducted. Honey bee venom composition was analyzed using Sodium Dodecyl Sulphate Polyacrylamide Gel Electrophoresis (SDS-PAGE) Method and Spectrophotometer UV-Vis Method. Analysis of antibacterial activity, was conducted using a modified agar diffusion m...

  12. Anti-Inflammatory Applications of Melittin, a Major Component of Bee Venom: Detailed Mechanism of Action and Adverse Effects

    OpenAIRE

    Gihyun Lee; Hyunsu Bae

    2016-01-01

    Inflammation is a pervasive phenomenon triggered by the innate and adaptive immune systems to maintain homeostasis. The phenomenon normally leads to recovery from infection and healing, but when not properly phased, inflammation may cause immune disorders. Bee venom is a toxin that bees use for their protection from enemies. However, for centuries it has been used in the Orient as an anti-inflammatory medicine for the treatment of chronic inflammatory diseases. Bee venom and its major compone...

  13. Crystallization and preliminary X-ray diffraction analysis of three myotoxic phospholipases A2 from Bothrops brazili venom

    International Nuclear Information System (INIS)

    Two myotoxic and noncatalytic Lys49-phospholipases A2 (braziliantoxin-II and MT-II) and a myotoxic and catalytic phospholipase A2 (braziliantoxin-III) from B. brazili were crystallized. X-ray diffraction data sets were collected and molecular-replacement solutions were obtained. Two myotoxic and noncatalytic Lys49-phospholipases A2 (braziliantoxin-II and MT-II) and a myotoxic and catalytic phospholipase A2 (braziliantoxin-III) from the venom of the Amazonian snake Bothrops brazili were crystallized. The crystals diffracted to resolutions in the range 2.56–2.05 Å and belonged to space groups P3121 (braziliantoxin-II), P6522 (braziliantoxin-III) and P21 (MT-II). The structures were solved by molecular-replacement techniques. Both of the Lys49-phospholipases A2 (braziliantoxin-II and MT-II) contained a dimer in the asymmetric unit, while the Asp49-phospholipase A2 braziliantoxin-III contained a monomer in its asymmetric unit. Analysis of the quaternary assemblies of the braziliantoxin-II and MT-II structures using the PISA program indicated that both models have a dimeric conformation in solution. The same analysis of the braziliantoxin-III structure indicated that this protein does not dimerize in solution and probably acts as a monomer in vivo, similar to other snake-venom Asp49-phospholipases A2

  14. In Vitro Assessment of Bee Venom Effects on Matrix Metalloproteinase Activity and Interferon Production

    Directory of Open Access Journals (Sweden)

    Mohsen Hamedani

    2005-03-01

    Full Text Available Controversial immunomodulatory properties of bee venom (BV have provided an appropriate field for more investigation. The aim of present research was to verify the effects of honeybee venom on matrix metalloproteinase activity and interferon production as well as cell proliferation in monocyte and fibroblast cell lines.The monocyte and fibroblast cell lines (K562, HT-1080, WEHI-164 were used in order to assess proliferative response, interferon-1 production and matrix metalloproteinase-2 (MMP-2 activity. Australian BV (ABV and Iranian BV (IBV preparations at concentrations of 0.025, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, and 1µg/ml were added to each overnight cultured cell. In time course study, cells were treated with each ABV and IBV. In all cases supernatants were collected 24 hours after treatment. A sample of the each medium was used for zymography and interferons assay. Non-treated cells were used as controls.The production of IFN- and IFN- in supernatant of cell culture was assessed using enzyme linked immunoassay procedure. MMP-2 activity, as an inflammatory index, was evaluated using zymoanalysis method.The results of this study showed that, there were no significant difference between two sources of honey bee venoms when they were added to an identical cell line, whereas, the responses of various cell lines against bee venom were different. The increasing amounts of bee venom to human monocyte cell line (K562 revealed a significant increase in proliferative response. Our findings showed that the bee venom had no influence on IFN- production in cell culture media, whereas, adding the BV to K562 cell line could significantly increase the production level of IFN- only on day 8 post-treatment. In addition the effect of bee venom on MMP-2 activity in both cell culture media, WEHI-164 and K562 was similar. The stimulatory effect of bee venom on MMP-2 activity occurred at low doses. In contrast, its inhibitory effect was seen at high

  15. Effect of bee venom or proplis on molecular and parasitological aspects of Schistosoma mansoni infected mice.

    Science.gov (United States)

    Mohamed, Azza H; Hassab El-Nabi, Sobhy E; Bayomi, Asmaa E; Abdelaal, Ahmed A

    2016-06-01

    The present study was performed to elucidate the efficacy of Apis mellifera L bee venom (BV) or proplis (200 mg/kg orally for three consecutive days) on Schistosoma mansoni infected mice. The results recorded reduction in the total worm burden, numbers of immature eggs and the ova count in hepatic tissue in BV (sting or injection) or proplis treated groups as compared to the infected group. Histological examination illustrated a significant increase (P ≤ 0.05) in the diameter of hepatic granuloma in BV treated groups (272.78 and 266.9, respectively) and a significant decrease in proplis treated mice (229.35) compared with the infected group (260.67). Electrophoretic pattern of RNA showed a decrease in mean of maximal optical density in liver and intestine of S. mansoni infected mice treated with bee venom (sting or injection) as compared with infected group. Flow cytometry analyses of RNA or apoptotic percentage of worms recovered from BV sting (19 and 49 % respectively); BV injected (20.5 and 51.17 %, respectively) and proplis (35 and 23.93 %, respectively) groups were compared with S. mansoni infected group (37.87 and 39.21 %, respectively). It can be concluded that administration of bee venom or proplis are effective in case of S. mansoni infection. Although bee venom cause increase of granuloma diameter and this might be due to venom concentration and further studies are required to avoid such harmful effect. PMID:27413311

  16. Biological and Biochemical Potential of Sea Snake Venom and Characterization of Phospholipase A2 and Anticoagulation Activity.

    Science.gov (United States)

    Damotharan, Palani; Veeruraj, Anguchamy; Arumugam, Muthuvel; Balasubramanian, Thangavel

    2016-03-01

    This study is designed to isolate and purify a novel anti-clotting protein component from the venom of Enhydrina schistosa, and explore its biochemical and biological activities. The active protein was purified from the venom of E. schistosa by ion-exchange chromatography using DEAE-cellulose. The venom protein was tested by various parameters such as, proteolytic, haemolytic, phospholipase and anti-coagulant activities. 80 % purity was obtained in the final stage of purification and the purity level of venom was revealed as a single protein band of about 44 kDa in SDS-polyacrylamide electrophoresis under reducing conditions. The results showed that the Potent hemolytic activity was observed against cow, goat, chicken and human (A, B and O positive) erythrocytes. Furthermore, the clotting assays showed that the venom of E. schistosa significantly prolonged in activated partial thromboplastin time, thrombin time, and prothrombin time. Venomous enzymes which hydrolyzed casein and gelatin substrate were found in this venom protein. Gelatinolytic activity was optimal at pH 5-9 and (1)H NMR analysis of purified venom was the base line information for the structural determination. These results suggested that the E. schistosa venom holds good promise for the development of novel lead compounds for pharmacological applications in near future. PMID:26855489

  17. Purification of a phospholipase A(2) from Daboia russelii siamensis venom with anticancer effects.

    Science.gov (United States)

    Khunsap, Suchitra; Pakmanee, Narumol; Khow, Orawan; Chanhome, Lawan; Sitprija, Visith; Suntravat, Montamas; Lucena, Sara E; Perez, John C; Sánchez, Elda E

    2011-01-01

    Venom phospholipases A2 (PLA(2)) are associated with neurotoxic, myotoxic, cardiotoxic, platelet aggregation, and edema activities. A PLA(2) (Drs-PLA(2)) was purified from Daboia russelii siamensis venom by a two-step purification procedure consisting of size-exclusion, followed by anion exchange high performance liquid chromatography (HPLC). The molecular weight of the Drs-PLA(2) was 13,679Da, which was determined by MALDI-TOF mass spectrometry. Its N-terminal amino acid sequence was homologous to basic PLA(2)s of viperid snake venoms. The Drs-PLA(2) had indirect hemolytic and anticoagulant activities, cytotoxic activity with a CC(50) of 65.8nM, and inhibited SK-MEL-28 cell migration with an IC(50) of 25.6nM. In addition, the Drs-PLA(2) inhibited the colonization of B16F10 cells in lungs of BALB/c mice by ∼65%. PMID:22091349

  18. The Effect of Bee Venom on COX-2, P38, ERK and JNK in RAW 264.7 Cells

    Directory of Open Access Journals (Sweden)

    Jae-Young Sim

    2003-06-01

    Full Text Available Objectives : The purpose of this study was to investigate the effect of Bee Venom on the lipopolysaccharide(LPS, sodium nitroprusside(SNP, hydrogen peroxide(H2O2-induced expressions of cyclooxygenase-2(COX-2, p38, jun N-terminal Kinase(JNK and extra-signal response kinase(ERK in RAW 264.7 cells, a murine macrophage cell line. Methods : The expressions of COX-2, p38, JNK and ERK were determined by western blotting with corresponding antibodies.\\ Results : 1. The 0.5, 1 and 5 ㎍/㎖ of bee venom inhibited significantly LPS and SNP-induced expression of COX-2 compared with control, respectively. The 0.5, 1 and 5 ㎍/㎖ of bee venom inhibited insignificantly H2O2-induced expression of COX-2 compared with control, respectively. 2. The 0.5, 1 and 5 ㎍/㎖ of bee venom inhibited significantly LPS, SNP and H2O2-induced expression of p38 compared with control, respectively. 3. The 1 and 5 ㎍/㎖ of bee venom inhibited significantly SNP-induced expression of JNK compared with control, respectively. All of bee venom inhibited insignificantly LPS and H2O2-induced expression of JNK compared with control, respectively. 4. The 5 ㎍/㎖ of bee venom inhibited significantly SNP-induced expression of ERK, the 0.5 ㎍/㎖ of bee venom increased significantly H2O2-induced expression of ERK compared with control. The 0.5, 1 and 5 ㎍/㎖ of bee venom inhibited insignificantly LPS-induced expression of ERK compared with control, respectively.

  19. Production of antibacterial peptide from bee venom via a new strategy for heterologous expression.

    Science.gov (United States)

    Hou, Chunsheng; Guo, Liqiong; Lin, Junfang; You, Linfeng; Wu, Wuhua

    2014-12-01

    Honey bee is important economic insect that not only pollinates fruits and crops but also provides products with various physiological activities. Bee venom is a functional agent that is widely applied in clinical treatment and pharmacy. Secapin is one of these agents that have a significant role in therapy. The functions of secapin from the bee venom have been documented, but little information is known about its heterologous expression under natural condition. Moreover, few scholars verified experimentally the functions of secapin from bee venom in vitro. In this study, we successfully constructed a heterologous expression vector, which is different from conventional expression system. A transgenic approach was established for transformation of secapin gene from the venom of Apis mellifera carnica (Ac-sec) into the edible fungi, Coprinus cinereus. Ac-sec was encoded by a 234 bp nucleotide that contained a signal peptide domain and two potential phosphorylation sites. The sequence exhibited highly homology with various secapins characterized from honey bee and related species. Southern blot data indicated that Ac-sec was present as single or multiple copy loci in the C. cinereus genome. By co-transformation and double-layer active assay, Ac-sec was expressed successfully in C. cinereus and the antibacterial activity of the recombinants was identified, showing notable antibacterial activities on different bacteria. Although Ac-sec is from the venom of Apidae, phylogenetic analysis demonstrated that Ac-sec was more closely related to that of Vespid than to bee species from Apidae. The molecular characteristics of Ac-sec and the potential roles of small peptides in biology were discussed. PMID:25189650

  20. Effects of bee venom treatment on growth performance of young pigs.

    Science.gov (United States)

    Han, Sang Mi; Lee, Kwang Gill; Yeo, Joo Hong; Hwang, Sung Jin; Jang, Chul Ho; Chenoweth, Peter J; Pak, Sok Cheon

    2009-01-01

    This study examined the effect of whole bee venom (BV) as a potential stimulant of the piglet immune system, on growth performance, blood parameters, plasma protein and immune globulin content of serum. Piglets (n = 97) received combinations of 0.5, 1.0, 1.5, 2.0 and 2.5 mg/kg of parenterally administered BV on 4 occasions between birth and Day 30. In the apipuncture group (n = 31), piglets were acupunctured with the worker honeybee. Two acupoints, GV-1 (Jiao-chao) and GV-20 (Bai-hui), were selected for apipuncture. All piglets (n = 128) in the treatment groups were treated 4 times throughout the study period of 60 days. The control piglets received no treatments. Blood was taken via jugular venipuncture on Day 30 after birth. Body weight and survivability were measured, and changes in hematological values were analyzed. Both the BV injection group and apipuncture group increased body weight and survivability by 26.6% and 21.8%, and 7.9% and 6.7% respectively compared to the controls. The numbers of leukocytes, erythrocytes, lymphocytes and monocytes were not influenced by treatments. However, a potential clinical benefit of high dose therapy was seen in increased populations of leukocytes, lymphocytes and monocytes compared with either the apipuncture or control groups. Other blood parameters such as total protein and albumin were not affected by treatment. However, IgG levels were generally higher in treated groups than in the controls. These findings indicate that BV might be useful to stimulate immuno-competence in pig production, possibly via the primary bioactive components of melittin, phospholipase A(2) and apamin. The administration of BV, either via injection or acupuncture, did not make any differences in growth performance of young pigs. These results would be useful for further purification and characterization of immune boosting agents from BV. PMID:19507270

  1. Case Report of Pes Anserine Bursitis patient treated with Bee Venom Acua-Acupuncture Therapy by Using DITI

    OpenAIRE

    Moon Ja-Young; Kim Kang; Lim Jin-Kang; Wang Wu-Hao; Jang Hyoung-Seok

    2004-01-01

    Objective : The purpose of this study is to report the effect of Bee Venom Acua-Acupuncture Therapy to the patient of Pes Anserine Bursitis by using DITI. Patient & Methods : The patient was 60-year-old woman who complained severe knee pain. She was treated by bee venom acuaacupuncture therapy. To estimate the efficacy of tratment, we used DITI, visual analog scale, knee joint check(ROM). Results : In this case, we treated patient of Pes Anserine Bursitis for 28 days. bee venom acua-a...

  2. Case Report of Pes Anserine Bursitis patient treated with Bee Venom Acua-Acupuncture Therapy by Using DITI

    Directory of Open Access Journals (Sweden)

    Moon Ja-Young

    2004-02-01

    Full Text Available Objective : The purpose of this study is to report the effect of Bee Venom Acua-Acupuncture Therapy to the patient of Pes Anserine Bursitis by using DITI. Patient & Methods : The patient was 60-year-old woman who complained severe knee pain. She was treated by bee venom acuaacupuncture therapy. To estimate the efficacy of tratment, we used DITI, visual analog scale, knee joint check(ROM. Results : In this case, we treated patient of Pes Anserine Bursitis for 28 days. bee venom acua-acupuncture therapy efficiently relieved patient's pain and improved ROM. DITI and Visual analog scale also showed significantly valuable changes.

  3. An LCMS method for the assay of melittin in cosmetic formulations containing bee venom.

    Science.gov (United States)

    Tusiimire, Jonans; Wallace, Jennifer; Dufton, Mark; Parkinson, John; Clements, Carol J; Young, Louise; Park, Jin Kyu; Jeon, Jong Woon; Watson, David G

    2015-05-01

    There is a growing interest in the potential of bee venom in cosmetics as a rejuvenating agent. Products currently on the market do not specify exactly their content of bee venom (BV). Therefore, we developed a method for the detection and quantification of melittin, as a marker of bee venom content, in selected commercial creams which contained BV according to their marketing claims, in order to gauge the relative quality of such formulations. A quantitative method was achieved following a rigorous extraction procedure involving sonication, liquid-liquid extraction and solid phase extraction since carryover of excipients was found to cause a rapid deterioration in the chromatographic performance. The method employed a standard additions approach using, as spiking standard, purified melittin isolated from bee venom and standardised by quantitative NMR. The aqueous extracts of the spiked creams were analysed by reversed phase LCMS on an LTQ Orbitrap mass spectrometer. The purity of the melittin spiking standard was determined to be 96.0%. The lowest measured mean melittin content in the creams was 3.19 ppm (±1.58 ppm 95% CI) while the highest was 37.21 ppm (±2.01 ppm 95% CI). The method showed adequate linearity (R (2) ≥ 0.98) and a recovery of 87.7-102.2% from a spiked blank cream. An assay precision of melittin content of the commercial products assayed were nearly tenfold. PMID:25749793

  4. Isolation and purification of BVⅠ-2H from bee venom and analysis of its biological action

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The medical use of bee venom for rheumatoid arthritis ( RA ) has a very long tradition. In this study, isolation and purification of polypeptides from bee venom were carried out on sephadex chromatography, heparin sepharose CL-6B chromatography and HPLC. Several fractions were extracted, and their effects on activation of splenocyte and THP-1 cell were studied. The inhibitory fraction was selected for further studies. Finally, BVⅠ-2H that the HPLC elution profiles was a single peak was isolated by C8 column. ESI- MS detection results showed that BVⅠ-2H was a fraction of bee venom, and the molecular weight of the major component was 644.8. BVⅠ-2H could inhibit ConA-induced splenocyte proliferation, IL-1 production and interfere with splenocyte cycle in mice. Moreover, BVⅠ-2H could inhibit PMA-induced TNFα production in THP-1 cells, which was due to its inhibitory effects on TNFα mRNA expression and protein phosphorylation of IκBα. Our studies indicated that BVⅠ-2H was one of the anti-inflammatory components of bee venom.

  5. A Clinical Report of Localized Itching After Treatment with Sweet Bee Venom

    Directory of Open Access Journals (Sweden)

    Choi Seok-woo

    2010-09-01

    Full Text Available Objectives : This study is to report the percentage of localized itching which occurred, when we injected to patients with Sweet Bee Venom(Sweet BV. Methods : We investigated 374 patients who had injected with Sweet BV in our clinic from February 15. 2009 to April 30, 2010. We checked the number and percentage of patients who occured localized itching on injection area. Then we analyzed those according to times in treatment, the body parts of injection and treatment dosage. Results and Conclusion : Localized itching was lower by 1.60% in the first treatment with Sweet BV. However localized itching was 12.83% in the whole course of treatment, which showed a similar incidence of 13% in Bee Venom. Therefore it can be interpreted that Sweet BV may help suppress the immune responses such as itching in the initial treatment, but the occurrence of local immune responses of Sweet BV may be similar to that of Bee Venom in continued treatment. We suppose that we should be careful of the occurrence of local immune responses as Bee Venom at least until the fourth treatment in clinical application with Sweet BV, although localized itching did not occur in the first treatment. Also we should be careful of treatment with Sweet BV in body parts, such as wrist, hand, chest and abdominal, because the percentage of localized itching was relatively high in those parts.

  6. Panurgines, novel antimicrobial peptides from the venom of communal bee Panurgus calcaratus (Hymenoptera: Andrenidae)

    Czech Academy of Sciences Publication Activity Database

    Čujová, Sabína; Slaninová, Jiřina; Monincová, Lenka; Fučík, Vladimír; Bednárová, Lucie; Štokrová, Jitka; Hovorka, Oldřich; Voburka, Zdeněk; Straka, J.; Čeřovský, Václav

    2013-01-01

    Roč. 45, č. 1 (2013), s. 143-157. ISSN 0939-4451 R&D Projects: GA ČR GA203/08/0536 Institutional support: RVO:61388963 Keywords : antimicrobial peptides * wild bee venom * CD spectroscopy * large unilamellar vesicles * electron microscopy Subject RIV: CE - Biochemistry Impact factor: 3.653, year: 2013

  7. 466 Bee venom Immunotherapy with Standardized Extract, Two Case Comunication and Clinical Progress

    Science.gov (United States)

    Cardona, Aristoteles Alvarez; Nieto, Leticia Hernandez; Melendez, Alvaro Pedroza

    2012-01-01

    Background Bee venom immunotherapy is a safe and effective treatment, indicated in patients with previous history of severe systemic reactions to bee venom, demonstrating succesful desensitization in more than 90% of cases with standardized extract. Currently in Mexico there is no standardized extract commercially available for treatment, despite of having high activity of beekeeping and occupational exposure with at least 17,478 registered stings per year and an annually honey production of nearly 70 tons. Methods We present the clinical progress of 2 patients with history of severe systemic reactions to bee venom and occupational exposure, both with demonstrated sensitization by specific IgE and who underwent specific immunotherapy with standardized extract (Alk-US) reaching a maintenance weekly dose of 100 mcg (PLA2) for the last 4 years. Results Both patients sufered of accidental stings after reached the maintenance dose presenting mild local reactions to stings. Both patients had very different clinical course presenting a wide variety of adverse reactions during desensitization protocol; from mild local to generalized reactions all generally well tolerated allowed to reach the maintenance dose with succesful desensitization proved by accidental exposure without severe systemic reactions. Conclusions Bee venom specific immunotherapy with standardized extract is a well tolerated and efective treatment preventing the development of life threathening reactions in sensitized patients. It is important to promote the use and availability of standardized extract in developing countries with poor safety measures and high occupational exposure.

  8. Characterization and amino-terminal sequence of phospholipase A2-II from the venom of Agkistrodon bilineatus (common cantil).

    Science.gov (United States)

    Nikai, T; Komori, Y; Ohara, A; Yagihashi, S; Ohizumi, Y; Sugihara, H

    1994-01-01

    1. Phospholipase A2 was isolated from the venom of Agkistrodon bilineatus by Sephadex G-75 and CM-Cellulose column chromatographies. 2. The purified phospholipase A2 gave a single band on disc polyacrylamide gel electrophoresis, sodium dodecyl sulfate polyacrylamide gel electrophoresis and ODS-HPLC. 3. The enzyme preparation had a mol. wt of 14,000, isoelectric point of pH 10.12 and possessed 121 amino acid residues. 4. The enzyme hydrolyzed the phospholipids phosphatidyl choline, phosphatidyl ethanolamine, phosphatidyl inositol and phosphatidyl serine. 5. The contraction of mouse diaphragm was inhibited by phospholipase A2-II. 6. Phospholipase A2 activity of this preparation was inhibited by ethylenediamine tetraacetic acid, ethyleneglycol (beta-aminoethyl) N,N,N',N'-tetraacetic acid, p-bromophenacyl bromide or N-bromosuccinimide, but not by iodoacetic acid or diisopropyl fluorophosphate. 7. The amino-terminal sequence of the PLA2-II was determined. PMID:8138046

  9. The Use of Chicken Igy in a Double Antibody Sandwich Elisa for the Quantification of Melittin in Bee Venom and Bee Venom Melittin Content in Cosmetics

    Directory of Open Access Journals (Sweden)

    Suh Lindsey Y. K.

    2015-06-01

    Full Text Available Two enzyme-linked immunosorbent assay (ELISA - based detection systems: indirect competitive ELISA and biotinylated double antibody sandwich ELISA (DAS-ELISA were developed to determine the melittin concentration in honeybee (Apis mellifera venom and the melittin concentration in cosmetics which contain bee venom. The indirect competitive ELISA employed chicken anti-melittin IgY. The biotinylated DAS-ELISA employed anti-melittin monoclonal antibody (MAb and biotinylated anti-melittin IgY. To produce anti-melittin IgY; Sigma melittin was emulsified with Freund‘s incomplete adjuvant and immunised to Leghorn laying chickens intramuscularly at four different sites (50 μg/mL, 0.25 mL per site of the breast muscles. After 5 to 8 weeks of the immunisation, anti-melittin IgY was extracted and analysed by ELISA. The anti-melittin IgY antibody produced was highly specific to melittin and did not cross-react with other bee venom proteins, as examined by ELISA and a western-blot assay. Indirect competitive ELISA demonstrated a higher range of melittin detection (2.5 to 80 μg/mL. Double antibody sandwich ELISA using MAb as the capture antibody and biotinylated polyclonal IgY as the detection antibody, provided a lower range of detection (2.5 - 40 ng/mL, which has a 1000 times higher sensitivity than that of indirect competitive ELISA. Therefore, indirect competitive ELISA is a useful tool to measure the concentration of melittin in bee venom as a raw material. Biotinylated DAS-ELISA, on the other hand, is more suitable for nanoscale quantification of melittin in commercial products.

  10. Description of Loxtox protein family and identification of a new group of Phospholipases D from Loxosceles similis venom gland.

    Science.gov (United States)

    Dantas, Arthur Estanislau; Carmo, A O; Horta, Carolina Campolina Rebello; Leal, Hortênsia Gomes; Oliveira-Mendes, Bárbara Bruna Ribeiro; Martins, Ana Paula Vimieiro; Chávez-Olórtegui, Carlos; Kalapothakis, Evanguedes

    2016-09-15

    Envenoming resulting from Loxosceles spider bites (loxoscelism) is a recognized public health problem in Brazil. However, the pathophysiology of loxoscelism caused by L. similis bites, which is widespread in Brazil, remains poorly understood. In the present work, the RNA sequencing (RNA-Seq - Next Generation sequencing - NGS) of the L. similis venom gland was performed to identify and analyze the sequences of the key component phospholipase D. The sequences were aligned based on their classical domains, and a phylogenetic tree was constructed. In the bioinformatics analysis, 23 complete sequences of phospholipase D proteins were found and classified as Loxtox proteins, as they contained the characteristic domains of phospholipase D: the active site, the Mg(2+)-binding domain, and the catalytic loop. Three phospholipase D sequences with non-canonical domains were also found in this work. They were analyzed separately and named PLDs from L. similis (PLD-Ls). This study is the first to characterize phospholipase D sequences from Loxosceles spiders by RNA-Seq. These results contribute new knowledge about the composition of L. similis venom, revealing novel tools that could be used for pharmacological, immunological, and biotechnological applications. PMID:27496061

  11. Comparison of the Effects between Sweet Bee Venom Pharmacopuncture and Scolopendrid Pharmacopuncture on Carpal Tunnel Syndrome (Randomized, Controlled Clinical Trial)

    OpenAIRE

    Ji-young Ku; Kyoung-hee Lee; Sung-Woo Cho; Sang-Chan Lee; Hyoun-min Youn; Kyung-jeon Jang; Choon-ho Song; Chang-beohm Ahn; Cheol-hong Kim

    2010-01-01

    Objectives : The purpose of this study is to compare the effects of Sweet Bee Venom Pharmacopuncture and Scolopendrid Pharmacopuncture on Carpal Tunnel Syndrome. Methods : From February to September 2010, the number of patients with Carpal Tunnel Syndrome who volunteered for this clinical study was 16 and 7 out of 16 patients complained both hands. Total 23 cases of hands were randomly divided by 2 groups. We injected Sweet Bee Venom Pharmacopuncture on PC7(Daereung) twice a week for 4week...

  12. Snake venom phospholipases A2: a new class of antitumor agents.

    Science.gov (United States)

    Rodrigues, Renata S; Izidoro, Luiz Fernando M; de Oliveira, Robson J; Sampaio, Suely V; Soares, Andreimar M; Rodrigues, Veridiana M

    2009-01-01

    Phospholipases A(2) (PLA(2)) are enzymes of high medical scientific interest due to their involvement in a large number of human inflammatory diseases. PLA(2) constitute a diverse family of enzymes which catalyses the hydrolysis of the sn-2 ester bond in glycerophospholipids and exhibit a wide range of physiological and pathological effects. The ubiquitous nature of PLA(2) highlights the important role they play in many biological processes, as cell signaling and cell growth, including the generation of proinflammatory lipid mediators such as prostaglandin and leukotrienes, regulation of lipid mediators. The activity and expression of several PLA(2) isoforms are increased in several human cancers, suggesting that these enzymes have a central role in both tumor development and progression and can be targets for anti-cancer drugs. On the other hand, some PLA(2) isolated from Viperidae venoms are capable to induce antitumoral activity. In summary PLA(2) from snake venoms can be a new class of anticancer agents and provide new molecular and biological insights of cancer development. PMID:19689415

  13. Inhibition of toxic actions of phospholipase A2 isolated & characterized from the Indian Banded Krait (Bungarus fasciatus) venom by synthetic herbal compounds

    OpenAIRE

    Gomes, Antony; Bhattacharya, Shamik; Mukherjee, Sanghamitra; Inn-ho-Tsai,; Gomes, Aparna

    2012-01-01

    Background & objectives: Phospholipase A2 (PLA2) is one of the major constituents of krait venom associated with several pathophysiological actions like myotoxicity, cardiotoxicity, neurotoxicity, etc. As there was no specific antiserum available against Bungarus fasciatus venom, this study was done with synthetic herbal compounds, anti PLA2 rabbit antiserum and commercial polyvalent snake venom antiserum to neutralize the PLA2 induced toxicities in experimental models. Methods: B. fasciatus ...

  14. Purification of Peptide Components including Melittin from Bee Venom using gel filtration chromatography and propionic acid/urea polyacrylamide gel electrophoresis

    OpenAIRE

    Young Chon Choi; Ki Rok, Kwon; Suk Ho, Choi

    2006-01-01

    Objectives : This study was conducted to carry out Purification of Melittin and other peptide components from Bee Venom using gel filtration chromatography and propionic acid/urea polyacrylamide gel electrophoresis Methods : Melittin and other peptide components were separated from bee venom by using gel filtration chromatography on Sephadex G-50 column in 0.05M ammonium acetate buffer. Results : Melittin and other peptide components were separated from bee venom by using gel filtration...

  15. Bee Venom Alleviates Motor Deficits and Modulates the Transfer of Cortical Information through the Basal Ganglia in Rat Models of Parkinson’s Disease

    OpenAIRE

    Maurice, Nicolas; Deltheil, Thierry; Melon, Christophe; Degos, Bertrand; Mourre, Christiane; Amalric, Marianne; Kerkerian-Le Goff, Lydia

    2015-01-01

    Recent evidence points to a neuroprotective action of bee venom on nigral dopamine neurons in animal models of Parkinson’s disease (PD). Here we examined whether bee venom also displays a symptomatic action by acting on the pathological functioning of the basal ganglia in rat PD models. Bee venom effects were assessed by combining motor behavior analyses and in vivo electrophysiological recordings in the substantia nigra pars reticulata (SNr, basal ganglia output structure) in pharmacological...

  16. Synergistic Effects of Secretory Phospholipase A2 from the Venom of Agkistrodon piscivorus piscivorus with Cancer Chemotherapeutic Agents

    OpenAIRE

    Jennifer Nelson; Kristen Barlow; D. Olin Beck; Amanda Berbert; Nathan Eshenroder; Lyndee Francom; Mark Pruitt; Kina Thompson; Kyle Thompson; Brian Thurber; Celestine H.-Y. Yeung; Allan M. Judd; Bell, John D.

    2013-01-01

    Healthy cells typically resist hydrolysis catalyzed by snake venom secretory phospholipase A2. However, during various forms of programmed cell death, they become vulnerable to attack by the enzyme. This observation raises the question of whether the specificity of the enzyme for dying cells could be used as a strategy to eliminate tumor cells that have been intoxicated but not directly killed by chemotherapeutic agents. This idea was tested with S49 lymphoma cells and a broad range of antine...

  17. The electrical response of bilayers to the bee venom toxin melittin: Evidence for transient bilayer permeabilization

    OpenAIRE

    Wiedman, Gregory; Herman, Katherine; Searson, Peter; Wimley, William C.; Hristova, Kalina

    2013-01-01

    Melittin is a 26-residue bee venom peptide that folds into amphipathic α-helix and causes membrane permeabilization via a mechanism that is still disputed. While an equilibrium transmembrane pore model has been a central part of the mechanistic dialogue for decades, there is growing evidence that a transmembrane pore is not required for melittin’s activity. In part, the controversy is due to limited experimental tools to probe the bilayer’s response to melittin. Electrochemical impedance spec...

  18. Combined Effects of Bee Venom Acupuncture and Morphine on Oxaliplatin-Induced Neuropathic Pain in Mice

    OpenAIRE

    Woojin Kim; Min Joon Kim; Donghyun Go; Byung-Il Min; Heung Sik Na; Sun Kwang Kim

    2016-01-01

    Oxaliplatin, a chemotherapeutic drug for colorectal cancer, induces severe peripheral neuropathy. Bee venom acupuncture (BVA) has been used to attenuate pain, and its effect is known to be mediated by spinal noradrenergic and serotonergic receptors. Morphine is a well-known opioid used to treat different types of pain. Here, we investigated whether treatment with a combination of these two agents has an additive effect on oxaliplatin-induced neuropathic pain in mice. To assess cold and mechan...

  19. Lasiocepsin, a novel cyclic antimicrobial peptide from the venom of eusocial bee Lasioglossum laticeps (Hymenoptera: Halictidae)

    Czech Academy of Sciences Publication Activity Database

    Monincová, Lenka; Slaninová, Jiřina; Fučík, Vladimír; Hovorka, Oldřich; Voburka, Zdeněk; Bednárová, Lucie; Maloň, Petr; Štokrová, Jitka; Čeřovský, Václav

    2012-01-01

    Roč. 43, č. 2 (2012), s. 751-761. ISSN 0939-4451 R&D Projects: GA ČR GA203/08/0536; GA ČR GAP205/10/1276 Grant ostatní: GAUK(CZ) 33779266 Keywords : antimicrobial peptides * disulfide bridge * analogs * peptide synthesis * wild-bee venom * CD spectroscopy Subject RIV: CE - Biochemistry Impact factor: 3.914, year: 2012

  20. Effects of Bee Venom on Glutamate-Induced Toxicity in Neuronal and Glial Cells

    OpenAIRE

    Sang Min Lee; Eun Jin Yang; Sun-Mi Choi; Seon Hwy Kim; Myung Gi Baek; Jing Hua Jiang

    2012-01-01

    Bee venom (BV), which is extracted from honeybees, is used in traditional Korean medical therapy. Several groups have demonstrated the anti-inflammatory effects of BV in osteoarthritis both in vivo and in vitro. Glutamate is the predominant excitatory neurotransmitter in the central nervous system (CNS). Changes in glutamate release and uptake due to alterations in the activity of glutamate transporters have been reported in many neurodegenerative diseases, including Parkinson's disease, Alzh...

  1. THE CHARACTERISTICS OF BIOACTIVE PEPTIDES AND ANTIBACTERIAL ACTIVITY OF HONEY BEE (Apis nigrocincta SMITH VENOM, ENDEMIC TO SULAWESI

    Directory of Open Access Journals (Sweden)

    Mokosuli Yermia Semuel

    2015-11-01

    Full Text Available Apis nigrocincta Smith is a species of honey bee cavity nesting, endemic to Sulawesi. Research that aims to find the composition of the bioactive content of peptides and antibacterial activity of honey bee venom A. nigrocincta Smith has been conducted. Honey bee venom composition was analyzed using Sodium Dodecyl Sulphate Polyacrylamide Gel Electrophoresis (SDS-PAGE Method and Spectrophotometer UV-Vis Method. Analysis of antibacterial activity, was conducted using a modified agar diffusion method. The results showed that the venom of the honey bee Apis nigrocincta Smith has five bands of molecules with a molecular weight i.e. 33.54kDa; 21 kDa and 15.43 kDa. The peptide detected were hyaluronidase, fosfolipase A, mellitin, lysofosfolipase or antigen 5. Antibacterial activity was higher than the control ampisilin and antibiotic streptomycin.

  2. Bee poison

    Science.gov (United States)

    Bee poisoning is caused by a sting from a bee, wasp , or yellow jacket. This article is for ... Bee, wasp, and yellow jacket stings contain a substance called venom. Africanized bee colonies are very sensitive ...

  3. Brown recluse spider (Loxosceles reclusa) venom phospholipase D (PLD) generates lysophosphatidic acid (LPA).

    Science.gov (United States)

    Lee, Sangderk; Lynch, Kevin R

    2005-10-15

    Envenomation by the brown recluse spider (Loxosceles reclusa) may cause local dermonecrosis and, rarely, coagulopathies, kidney failure and death. A venom phospholipase, SMaseD (sphingomyelinase D), is responsible for the pathological manifestations of envenomation. Recently, the recombinant SMaseD from Loxosceles laeta was demonstrated to hydrolyse LPC (lysophosphatidylcholine) to produce LPA (lysophosphatidic acid) and choline. Therefore activation of LPA signalling pathways may be involved in some manifestations of Loxosceles envenomation. To begin investigating this idea, we cloned a full-length cDNA encoding L. reclusa SMaseD. The 305 amino acid sequence of the L. reclusa enzyme is 87, 85 and 60% identical with those of L. arizonica, L. intermedia and L. laeta respectively. The recombinant enzyme expressed in bacteria had broad substrate specificity. The lysophospholipids LPC, LPI (18:1-1-oleyol lysophosphatidylinositol), LPS, LPG (18:1-1-oleoyl-lysophosphatidylglycerol), LBPA (18:1-1-oleoyl-lysobisphosphatidic acid) (all with various acyl chains), lyso-platelet-activating factor (C16:0), cyclic phosphatidic acid and sphingomyelin were hydrolysed, whereas sphingosylphosphorylcholine, PC (phosphatidylcholine; C22:6, C20:4 and C6:0), oxidized PCs and PAF (platelet-activating factor; C16:0) were not hydrolysed. The PAF analogue, edelfosine, inhibited enzyme activity. Recombinant enzyme plus LPC (C18:1) induced the migration of A2058 melanoma cells, and this activity was blocked by the LPA receptor antagonist, VPC32183. The recombinant spider enzyme was haemolytic, but this activity was absent from catalytically inactive H37N (His37-->Asn) and H73N mutants. Our results demonstrate that Loxosceles phospholipase D hydrolyses a wider range of lysophospholipids than previously supposed, and thus the term 'SMaseD' is too limited in describing this enzyme. PMID:15926888

  4. Comparative study of Acupuncture, Bee Venom Acupuncture and Bee Venom Herbal Acupuncture on the treatment of Post-stroke Hemiplegic Shoulder Pain

    Directory of Open Access Journals (Sweden)

    Jae Yong Eom

    2006-02-01

    Full Text Available Objective : This experiment was conducted to evaluate the effectiveness of Acupuncture, Bee Venom Acupuncture (BVA and Bee Venom Herbal Acupuncture (BVHA on post-stroke hemiplegic shoulder pain. Methods : 30 patients were randomly allocated into Acupuncture group, BVA group and BVHA group and was monitored weekly for 4 weeks; initial(T0, 1 week(T1, 2 weeks(T2, 3 weeks(T3 and 4 weeks(T4. Results : Visual analogue scale of shoulder pain showed significant decrease in BVA and BVHA groups compared to the Acupuncture group at T4 evaluation. Painless passive ROM of shoulder external rotation and Fugl-Meyer Motor Assessment of Upper Limb motor function showed significant increase in all groups. Modified Ashworth scale of the spasticity of upper limb showed no differences between the three groups. Conclusion : BVA & BVHA appears to be an effective in treating post-stroke hemiplegic shoulder pain. Further clinical studies must be done to obtain more concrete findings.

  5. Novel antimicrobial peptides from the venom of solitary bees

    Czech Academy of Sciences Publication Activity Database

    Čeřovský, Václav; Cvačka, Josef; Voburka, Zdeněk; Hovorka, Oldřich; Slaninová, Jiřina; Fučík, Vladimír; Bednárová, Lucie

    2008-01-01

    Roč. 14, č. 8 (2008), s. 92-92. ISSN 1075-2617. [European Peptide Symposium /30./. 31.08.2008-05.09.2008, Helsinki] Institutional research plan: CEZ:AV0Z40550506 Keywords : antimicrobial peptides * solitary bees * melectin * isolation and characterization Subject RIV: CC - Organic Chemistry

  6. Anti-cancer effect of bee venom toxin and melittin in ovarian cancer cells through induction of death receptors and inhibition of JAK2/STAT3 pathway

    Energy Technology Data Exchange (ETDEWEB)

    Jo, Miran; Park, Mi Hee; Kollipara, Pushpa Saranya [College of Pharmacy and Medical Research Center, Chungbuk National University, 48, Gaeshin-dong, Heungduk-gu, Cheongju, Chungbuk, 361-763 (Korea, Republic of); An, Byeong Jun; Song, Ho Sueb [College of Oriental Medicine, Kyungwon University, San 65, Bokjeong-dong, Sujeong-gu, Seongnam, Gyeonggii 461-701 (Korea, Republic of); Han, Sang Bae [College of Pharmacy and Medical Research Center, Chungbuk National University, 48, Gaeshin-dong, Heungduk-gu, Cheongju, Chungbuk, 361-763 (Korea, Republic of); Kim, Jang Heub [Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, 505, Banpo-dong, Seocho-gu, Seoul 137-040 (Korea, Republic of); Song, Min Jong, E-mail: bitsugar@catholic.ac.kr [Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, 505, Banpo-dong, Seocho-gu, Seoul 137-040 (Korea, Republic of); Hong, Jin Tae, E-mail: jinthong@chungbuk.ac.kr [College of Pharmacy and Medical Research Center, Chungbuk National University, 48, Gaeshin-dong, Heungduk-gu, Cheongju, Chungbuk, 361-763 (Korea, Republic of)

    2012-01-01

    We investigated whether bee venom and melittin, a major component of bee venom, inhibit cell growth through enhancement of death receptor expressions in the human ovarian cancer cells, SKOV3 and PA-1. Bee venom (1–5 μg/ml) and melittin (0.5–2 μg/ml) inhibited the growth of SKOV3 and PA-1 ovarian cancer cells by the induction of apoptotic cell death in a dose dependent manner. Consistent with apoptotic cell death, expression of death receptor (DR) 3 and DR6 was increased in both cancer cells, but expression of DR4 was increased only in PA-1 cells. Expression of DR downstream pro-apoptotic proteins including caspase-3, 8, and Bax was concomitantly increased, but the phosphorylation of JAK2 and STAT3 and the expression of Bcl-2 were inhibited by treatment with bee venom and melittin in SKOV3 and PA-1 cells. Expression of cleaved caspase-3 was increased in SKOV3, but cleaved caspase-8 was increased in PA-1 cells. Moreover, deletion of DR3, DR4, and DR6 by small interfering RNA significantly reversed bee venom and melittin-induced cell growth inhibitory effect as well as down regulation of STAT3 by bee venom and melittin in SKOV3 and PA-1 ovarian cancer cell. These results suggest that bee venom and melittin induce apoptotic cell death in ovarian cancer cells through enhancement of DR3, DR4, and DR6 expression and inhibition of STAT3 pathway. -- Highlights: ► Some studies have showed that bee venom and/or melittin have anti-cancer effects. ► We found that bee venom and melittin inhibited cell growth in ovarian cancer cells. ► Bee venom and melittin induce apoptosis in SKOV3 and PA-1.

  7. Anti-cancer effect of bee venom toxin and melittin in ovarian cancer cells through induction of death receptors and inhibition of JAK2/STAT3 pathway

    International Nuclear Information System (INIS)

    We investigated whether bee venom and melittin, a major component of bee venom, inhibit cell growth through enhancement of death receptor expressions in the human ovarian cancer cells, SKOV3 and PA-1. Bee venom (1–5 μg/ml) and melittin (0.5–2 μg/ml) inhibited the growth of SKOV3 and PA-1 ovarian cancer cells by the induction of apoptotic cell death in a dose dependent manner. Consistent with apoptotic cell death, expression of death receptor (DR) 3 and DR6 was increased in both cancer cells, but expression of DR4 was increased only in PA-1 cells. Expression of DR downstream pro-apoptotic proteins including caspase-3, 8, and Bax was concomitantly increased, but the phosphorylation of JAK2 and STAT3 and the expression of Bcl-2 were inhibited by treatment with bee venom and melittin in SKOV3 and PA-1 cells. Expression of cleaved caspase-3 was increased in SKOV3, but cleaved caspase-8 was increased in PA-1 cells. Moreover, deletion of DR3, DR4, and DR6 by small interfering RNA significantly reversed bee venom and melittin-induced cell growth inhibitory effect as well as down regulation of STAT3 by bee venom and melittin in SKOV3 and PA-1 ovarian cancer cell. These results suggest that bee venom and melittin induce apoptotic cell death in ovarian cancer cells through enhancement of DR3, DR4, and DR6 expression and inhibition of STAT3 pathway. -- Highlights: ► Some studies have showed that bee venom and/or melittin have anti-cancer effects. ► We found that bee venom and melittin inhibited cell growth in ovarian cancer cells. ► Bee venom and melittin induce apoptosis in SKOV3 and PA-1.

  8. Radioprotection of Wistar Rat Lymphocytes Against Microwave Radiation Mediated by Bee Venom

    International Nuclear Information System (INIS)

    Microwave radiation is a type of non-ionising electromagnetic radiation present in the environment, and is a potential threat to human health. Cytogenetic studies of microwave radiation conducted in vitro and in vivo, yielded contradictory and often intriguing experimental results. Some reports suggest that exposure of human cells to radiofrequency radiation does not result in increased cytogenetic damage. On the other hand, there is a range of studies showing that radiofrequency radiation can indeed induce genetic alteration after exposure to electric field. Bee venom is used in traditional medicine to treat variety of conditions, such as arthritis, rheumatism, back pain and skin disease. In recent years it has been reported that bee venom possesses antimutagenic, proinflammatory, anti-inflammatory, antinociceptive, and anticancer effects. In addition to the wide range of the bee venom's activities, it also possesses a radioprotective capacity that was noted against X-ray and gamma radiation in various test systems. The aim of the present study was assessment of the radioprotective effect of bee venom against 915 MHz microwave radiation-induced DNA damage in the Wistar rat's lymphocytes in vitro. The possible genotoxic effect of bee venom alone was also assessed on non-irradiated lymphocytes. The alkaline comet assay was used as a sensitive tool in The assessment of DNA damage was performed using the alkaline comet assay and the Fpg-modified comet assay that is more specific technique in detection of DNA strand breaks and oxidative stress. Whole blood was collected from adult male Wistar rats (11 weeks old, approximate body weight 350 g)by cardiac puncture under sterile conditions in heparinized vacutainer tubes. After collection, blood was divided into 1 ml aliquots and placed into 24-well culture plates according to the exposure conditions. Bee venom was added to lymphocyte cultures in final concentration of 1 μg/ml, 4 h prior to irradiation and immediately

  9. MVL-PLA2, a Snake Venom Phospholipase A2, Inhibits Angiogenesis through an Increase in Microtubule Dynamics and Disorganization of Focal Adhesions

    OpenAIRE

    Bazaa, Amine,; Pasquier, Eddy; Defilles, Céline; Limam, Ines; Kessentini-Zouari, Raoudha; Kallech-Ziri, Olfa; Battari, Assou El; Braguer, Diane; Ayeb, Mohamed El; Marrakchi, Naziha; Luis, José

    2010-01-01

    Integrins are essential protagonists of the complex multi-step process of angiogenesis that has now become a major target for the development of anticancer therapies. We recently reported and characterized that MVL-PLA2, a novel phospholipase A2 from Macrovipera lebetina venom, exhibited anti-integrin activity. In this study, we show that MVL-PLA2 also displays potent anti-angiogenic properties. This phospholipase A2 inhibited adhesion and migration of human microvascular-endothelial cells (H...

  10. Isolation of melittin from bee venom and evaluation of its effect on proliferation of gastric cancer cells

    OpenAIRE

    Mahmoodzadeh A; Morady A; Zarrinnahad H; Pooshang Bagheri K; Ghasemi-Dehkordi P; Mahdavi M; Shahbazzadeh D; Shahmorady H

    2013-01-01

    Background: Gastric cancer (GC) is one of the most common cancers worldwide and in Iran. Conventional therapies are surgery and chemotherapy. Current studies are evaluating natural compounds in inhibiting growth of cancer cell. In this study isolated peptide melittin with 26 amino acids from bee venom and its impact on the viability and proliferation of gastric cancer cells was investigated. Methods: At first melittin was purified from honeybee venom using a reversed-phase high performance li...

  11. Skin Sensitization Study of Bee Venom (Apis mellifera L.) in Guinea Pigs

    OpenAIRE

    Han, Sang Mi; Lee, Gwang Gill; Park, Kyun Kyu

    2012-01-01

    Bee venom (Apis mellifera L., BV) has been used as a cosmetic ingredient for antiaging, anti-inflammatory and antibacterial functions. The aim of this study was to access the skin sensitization of BV, a Buehler test was conducted fifty healthy male Hartley guinea pigs with three groups; Group G1 (BVsensitization group, 20 animals), group G2 (the positive control-sensitization group, 20 animals), and group G3 (the ethyl alcohol-sensitization group, 10 animals). The exposure on the left flank f...

  12. The Effects of Bee Venom on iNOS, TNF-α and NF-kB in RAW 264.7 Cells

    Directory of Open Access Journals (Sweden)

    Goon-Joong Kim

    2003-06-01

    Full Text Available Objectives : The purpose of this study was to investigate the effects of Bee Venom on the lipopolysaccharide(LPS, sodium nitroprusside(SNP, hydrogen peroxide(H2O2-induced expression inducilble nitric oxide synthetase(iNOS, tumor necrosis factor-α(TNF-α and nuclear factor kappa B(NF-kB in RAW 264.7 cells, a murine macrophage cell line. Methods : The expressions of expression iNOS and TNF-α were determined by western blotting with corresponding antibodies. The expressions of expression NF-kB was assayed by EMSA method. Results : 1. The 0.5, 1 and 5 ㎍/㎖ of bee venom on LPS-induced expression of iNOS, the 5 ㎍/㎖ of bee venom on SNP-induced expression of iNOS and the 1 ㎍/㎖ of bee venom on H2O2-induced expression of iNOS compared with control were inhibited significantly. 2. The 0.5, 1 and 5 ㎍/㎖ of bee venom inhibited significantly LPS and H2O2-induced expression of TNF-α compared with control, respectively. The 0.5 ㎍/㎖ of bee venom increased significantly SNP-induced expression of TNF-α compared with control. 3. The 5 ㎍/㎖ of bee venom on LPS-induced expression of NF-kB, the 0.5 ㎍/㎖ of bee venom on SNP-induced expression of NF-kB and the 0.5, 5 ㎍/㎖ of bee venom on H2O2-induced expression of NF-kB were inhibited significantly compared with control, respectively.

  13. Structures of Azemiops feae venom phospholipases and cys-rich-secretory protein and implications for taxonomy and toxinology.

    Science.gov (United States)

    Tsai, Inn-Ho; Wang, Ying-Ming; Huang, Kai-Fa

    2016-05-01

    The Azemiops snakes are pit-less and phylogenetically located at the Crotalinae and Viperinae divergence. cDNAs encoding five Azemiops venom phospholipase (sPLA2) molecules were cloned and sequenced; their signal-peptides were similar to those of crotalid sPLA2s. Based on their calculated pI-values and residue-49 substitutions, they were designated as Af-E6, Af-N49a, Af-N49a1, Af-N49a2, and Af-N49b, respectively. The first three isoforms, comprising 3-4% of the venom proteins, were purified by reversed-phase HPLC. Af-E6 is catalytically active and has >80% sequence-similarity to other Glu(6)-PLA2 (a pitviper venom-marker). Results of phylogenetic analyses reveal that acidic Af-N49a and Af-N49a1 are rather unique and loosely linked with crotalid PLA2s, while Af-N49b is related to the viperid PLA2s with Ser(1) substitution. Notably, the Asn(49)-substitutions in these molecules imply catalytic-independent mechanisms. The 3D-models of Af-E6 and Af-N49a have surface electropotential maps similar to each other and to those of antiplatelet PLA2s, while the Af-N49b model is similar to basic and myotoxic sPLA2 molecules. From Azemiops feae and four other Viperidae, we cloned five novel Cys-rich secretory proteins (CRISPs). Azemiops CRISP and natriuretic-peptide precursors share more sequence similarities with those of crotalid venoms than with viperid venoms, further supporting the theory that Azemiops are sister taxons to pit vipers, especially Tropedolaemus. PMID:26908291

  14. Structure-activity study of macropin, a novel antimicrobial peptide from the venom of solitary bee Macropis fulvipes (Hymenoptera: Melittidae)

    Czech Academy of Sciences Publication Activity Database

    Monincová, Lenka; Veverka, Václav; Slaninová, Jiřina; Buděšínský, Miloš; Fučík, Vladimír; Bednárová, Lucie; Straka, J.; Čeřovský, Václav

    2014-01-01

    Roč. 20, č. 6 (2014), s. 375-384. ISSN 1075-2617 R&D Projects: GA ČR GA203/08/0536 Institutional support: RVO:61388963 Keywords : antimicrobial peptide * analog * wild bee venom * NMR spectroscopy * CD spectroscopy Subject RIV: CE - Biochemistry Impact factor: 1.546, year: 2014

  15. Effects of Sweet Bee Venom on the respiratory system in Rats

    Directory of Open Access Journals (Sweden)

    Jong Young Lee

    2011-09-01

    Full Text Available Objectives: This study was performed to analyse the effects of Sweet Bee Venom(SBV-purified melittin supported by G&V Co., the major component of honey bee venom on the respiratory system in rats. Methods: All experiments were conducted at Biotoxtech Company, a non-clinical studies authorized institution, under the regulations of Good Laboratory Practice(GLP. Male rats of 5 weeks old were chosen for this study and after confirming condition of rats was stable, SBV was administered in thigh muscle of rats in 0.175, 0.35 and 0.7 mg/kg dosage. And checked the effects of SBV on the respiratory system using the whole body plethysmography. And respiratory rate, tidal volume and minute volume of rats were checked after administered SBV (melittin. Results: 1. In the measurement of respiratory rate, there were not observed any significant differences compared with control group. 2. In the measurement of tidal volume, there was not observed any significant differences compared with control group. 3. In the measurement of minute volume, 0.35 dosage group showed significant differences compared with control group. But we estimated that this result was caused by individual differences. Conclusions: Above findings suggest that SBV seems to be safe treatment in the respiratory system of rats. And further studies on the subject should be conducted to yield more concrete evidences.

  16. Experimental study of antigenicity test of Sweet Bee Venom in Guinea Pigs

    Directory of Open Access Journals (Sweden)

    Byung Jun Cho

    2011-12-01

    Full Text Available Objectives: This study was performed to examine the antigenic potential of pure melittin (Sweet Bee Venom - SBV extracted from the bee venom by utilizing protein isolation method of gel filtration. Methods: All experiments were conducted at Biotoxtech (Chungwon, Korea, authorized a non-clinical studies institution, under the regulations of Good Laboratory Practice (GLP. Antigenic potential of SBV was examined by active systemic anaphylaxis (ASA and passive cutaneous anaphylaxis (PCA in guinea pigs. SBV was subcutaneously administered at 0.07 and 0.28㎎/㎏and also as a suspension with adjuvant (Freund's complete adjuvant: FCA. Ovalbumin (OVA as a suspension with adjuvant was used to induce positive control response (5㎎/㎖- FCA. Results: 1. In the ASA test, experimental groups showed some symptoms of anaphylaxis like piloerection, hyperpnea and staggering gait. 2. In the PCA test, low dosage group did not show any antibody responses, whereas high dosage group showed positive responses. 3. In the weight measurement and clinical observation, experimental groups didn't show any significant changes compared with control group. 4. In the autopsy of body, the abnormalities of lung were detected in the corpse. This means that the cause of death may induced anaphylactic shock. Conclusions: Above findings suggested that SBV had antigenic potential in guinea pig. Further studies on the subject should be conducted to yield more concrete evidences.

  17. Bee Venom Pharmacopuncture: An Effective Treatment for Complex Regional Pain Syndrome

    Directory of Open Access Journals (Sweden)

    Jong-Min Kim

    2014-12-01

    Full Text Available Objectives: Treating complex regional pain syndrome (CRPS is difficult because it still does not have a recommended therapy. A 29-year-old man was diagnosed with CRPS after surgery on his 4th and 5th left toes 7 years ago. Though he had undergone diverse pain treatment, the symptoms persisted, so he visited Dunsan Korean Medicine Hospital of Daejeon University. This case report presents results on the effect of bee venom pharmacopuncture in treating patient with CRPS. Methods: Bee venom pharmacopuncture (BVP, 0.15 to 0.4 mL dosage, was administered at GB43. The treatment was applied each week for a total 14 times. The symptoms were evaluated using a numeric rating scale (NRS and the dosage of pain medicine. Results: On the first visit, he was taking an anticonvulsant, a trycyclic antidepressant, and an analgesic. On the NRS the worst pain in the toes received a score of 8. He also complained of severe pain and hypersensitivity when the 4th and the 5th toes were touched just slightly. Other complaint included dyspepsia, rash, and depression. After treatment, on the NRS, the score for toe pain was 0, and he no longer needed to take pain medication. During the 4-months follow-up period, he has remained without pain; neither have additional symptoms appeared nor adverse events occurred. Conclusion: BVP may have potential benefits for treating patients with CRPS.

  18. Pharmacological Alternatives for the Treatment of Neurodegenerative Disorders: Wasp and Bee Venoms and Their Components as New Neuroactive Tools

    Directory of Open Access Journals (Sweden)

    Juliana Silva

    2015-08-01

    Full Text Available Neurodegenerative diseases are relentlessly progressive, severely impacting affected patients, families and society as a whole. Increased life expectancy has made these diseases more common worldwide. Unfortunately, available drugs have insufficient therapeutic effects on many subtypes of these intractable diseases, and adverse effects hamper continued treatment. Wasp and bee venoms and their components are potential means of managing or reducing these effects and provide new alternatives for the control of neurodegenerative diseases. These venoms and their components are well-known and irrefutable sources of neuroprotectors or neuromodulators. In this respect, the present study reviews our current understanding of the mechanisms of action and future prospects regarding the use of new drugs derived from wasp and bee venom in the treatment of major neurodegenerative disorders, including Alzheimer’s Disease, Parkinson’s Disease, Epilepsy, Multiple Sclerosis and Amyotrophic Lateral Sclerosis.

  19. Three Valuable Peptides from Bee and Wasp Venoms for Therapeutic and Biotechnological Use: Melittin, Apamin and Mastoparan

    Directory of Open Access Journals (Sweden)

    Miguel Moreno

    2015-04-01

    Full Text Available While knowledge of the composition and mode of action of bee and wasp venoms dates back 50 years, the therapeutic value of these toxins remains relatively unexploded. The properties of these venoms are now being studied with the aim to design and develop new therapeutic drugs. Far from evaluating the extensive number of monographs, journals and books related to bee and wasp venoms and the therapeutic effect of these toxins in numerous diseases, the following review focuses on the three most characterized peptides, namely melittin, apamin, and mastoparan. Here, we update information related to these compounds from the perspective of applied science and discuss their potential therapeutic and biotechnological applications in biomedicine.

  20. Three valuable peptides from bee and wasp venoms for therapeutic and biotechnological use: melittin, apamin and mastoparan.

    Science.gov (United States)

    Moreno, Miguel; Giralt, Ernest

    2015-04-01

    While knowledge of the composition and mode of action of bee and wasp venoms dates back 50 years, the therapeutic value of these toxins remains relatively unexploded. The properties of these venoms are now being studied with the aim to design and develop new therapeutic drugs. Far from evaluating the extensive number of monographs, journals and books related to bee and wasp venoms and the therapeutic effect of these toxins in numerous diseases, the following review focuses on the three most characterized peptides, namely melittin, apamin, and mastoparan. Here, we update information related to these compounds from the perspective of applied science and discuss their potential therapeutic and biotechnological applications in biomedicine. PMID:25835385

  1. Pharmacological Alternatives for the Treatment of Neurodegenerative Disorders: Wasp and Bee Venoms and Their Components as New Neuroactive Tools

    Science.gov (United States)

    Silva, Juliana; Monge-Fuentes, Victoria; Gomes, Flávia; Lopes, Kamila; dos Anjos, Lilian; Campos, Gabriel; Arenas, Claudia; Biolchi, Andréia; Gonçalves, Jacqueline; Galante, Priscilla; Campos, Leandro; Mortari, Márcia

    2015-01-01

    Neurodegenerative diseases are relentlessly progressive, severely impacting affected patients, families and society as a whole. Increased life expectancy has made these diseases more common worldwide. Unfortunately, available drugs have insufficient therapeutic effects on many subtypes of these intractable diseases, and adverse effects hamper continued treatment. Wasp and bee venoms and their components are potential means of managing or reducing these effects and provide new alternatives for the control of neurodegenerative diseases. These venoms and their components are well-known and irrefutable sources of neuroprotectors or neuromodulators. In this respect, the present study reviews our current understanding of the mechanisms of action and future prospects regarding the use of new drugs derived from wasp and bee venom in the treatment of major neurodegenerative disorders, including Alzheimer’s Disease, Parkinson’s Disease, Epilepsy, Multiple Sclerosis and Amyotrophic Lateral Sclerosis. PMID:26295258

  2. Anti-Inflammatory Activity of Bee Venom in BV2 Microglial Cells: Mediation of MyD88-Dependent NF-κB Signaling Pathway

    OpenAIRE

    Im, Eun Ju; Kim, Su Jung; Hong, Seung Bok; PARK, Jin-Kyu; Rhee, Man Hee

    2016-01-01

    Bee venom has long been used as a traditional folk medicine in Korea. It has been reportedly used for the treatment of arthritis, cancer, and inflammation. Although its anti-inflammatory activity in lipopolysaccharide- (LPS-) stimulated inflammatory cells has been reported, the exact mechanism of its anti-inflammatory action has not been fully elucidated. Therefore, the aim of this study was to investigate the anti-inflammatory mechanism of bee venom in BV2 microglial cells. We first investig...

  3. Bee Venom Alleviates Motor Deficits and Modulates the Transfer of Cortical Information through the Basal Ganglia in Rat Models of Parkinson's Disease.

    Directory of Open Access Journals (Sweden)

    Nicolas Maurice

    Full Text Available Recent evidence points to a neuroprotective action of bee venom on nigral dopamine neurons in animal models of Parkinson's disease (PD. Here we examined whether bee venom also displays a symptomatic action by acting on the pathological functioning of the basal ganglia in rat PD models. Bee venom effects were assessed by combining motor behavior analyses and in vivo electrophysiological recordings in the substantia nigra pars reticulata (SNr, basal ganglia output structure in pharmacological (neuroleptic treatment and lesional (unilateral intranigral 6-hydroxydopamine injection PD models. In the hemi-parkinsonian 6-hydroxydopamine lesion model, subchronic bee venom treatment significantly alleviates contralateral forelimb akinesia and apomorphine-induced rotations. Moreover, a single injection of bee venom reverses haloperidol-induced catalepsy, a pharmacological model reminiscent of parkinsonian akinetic deficit. This effect is mimicked by apamin, a blocker of small conductance Ca2+-activated K+ (SK channels, and blocked by CyPPA, a positive modulator of these channels, suggesting the involvement of SK channels in the bee venom antiparkinsonian action. In vivo electrophysiological recordings in the substantia nigra pars reticulata (basal ganglia output structure showed no significant effect of BV on the mean neuronal discharge frequency or pathological bursting activity. In contrast, analyses of the neuronal responses evoked by motor cortex stimulation show that bee venom reverses the 6-OHDA- and neuroleptic-induced biases in the influence exerted by the direct inhibitory and indirect excitatory striatonigral circuits. These data provide the first evidence for a beneficial action of bee venom on the pathological functioning of the cortico-basal ganglia circuits underlying motor PD symptoms with potential relevance to the symptomatic treatment of this disease.

  4. Bee Venom Alleviates Motor Deficits and Modulates the Transfer of Cortical Information through the Basal Ganglia in Rat Models of Parkinson's Disease.

    Science.gov (United States)

    Maurice, Nicolas; Deltheil, Thierry; Melon, Christophe; Degos, Bertrand; Mourre, Christiane; Amalric, Marianne; Kerkerian-Le Goff, Lydia

    2015-01-01

    Recent evidence points to a neuroprotective action of bee venom on nigral dopamine neurons in animal models of Parkinson's disease (PD). Here we examined whether bee venom also displays a symptomatic action by acting on the pathological functioning of the basal ganglia in rat PD models. Bee venom effects were assessed by combining motor behavior analyses and in vivo electrophysiological recordings in the substantia nigra pars reticulata (SNr, basal ganglia output structure) in pharmacological (neuroleptic treatment) and lesional (unilateral intranigral 6-hydroxydopamine injection) PD models. In the hemi-parkinsonian 6-hydroxydopamine lesion model, subchronic bee venom treatment significantly alleviates contralateral forelimb akinesia and apomorphine-induced rotations. Moreover, a single injection of bee venom reverses haloperidol-induced catalepsy, a pharmacological model reminiscent of parkinsonian akinetic deficit. This effect is mimicked by apamin, a blocker of small conductance Ca2+-activated K+ (SK) channels, and blocked by CyPPA, a positive modulator of these channels, suggesting the involvement of SK channels in the bee venom antiparkinsonian action. In vivo electrophysiological recordings in the substantia nigra pars reticulata (basal ganglia output structure) showed no significant effect of BV on the mean neuronal discharge frequency or pathological bursting activity. In contrast, analyses of the neuronal responses evoked by motor cortex stimulation show that bee venom reverses the 6-OHDA- and neuroleptic-induced biases in the influence exerted by the direct inhibitory and indirect excitatory striatonigral circuits. These data provide the first evidence for a beneficial action of bee venom on the pathological functioning of the cortico-basal ganglia circuits underlying motor PD symptoms with potential relevance to the symptomatic treatment of this disease. PMID:26571268

  5. Bee Venom Alleviates Motor Deficits and Modulates the Transfer of Cortical Information through the Basal Ganglia in Rat Models of Parkinson’s Disease

    Science.gov (United States)

    Maurice, Nicolas; Deltheil, Thierry; Melon, Christophe; Degos, Bertrand; Mourre, Christiane

    2015-01-01

    Recent evidence points to a neuroprotective action of bee venom on nigral dopamine neurons in animal models of Parkinson’s disease (PD). Here we examined whether bee venom also displays a symptomatic action by acting on the pathological functioning of the basal ganglia in rat PD models. Bee venom effects were assessed by combining motor behavior analyses and in vivo electrophysiological recordings in the substantia nigra pars reticulata (SNr, basal ganglia output structure) in pharmacological (neuroleptic treatment) and lesional (unilateral intranigral 6-hydroxydopamine injection) PD models. In the hemi-parkinsonian 6-hydroxydopamine lesion model, subchronic bee venom treatment significantly alleviates contralateral forelimb akinesia and apomorphine-induced rotations. Moreover, a single injection of bee venom reverses haloperidol-induced catalepsy, a pharmacological model reminiscent of parkinsonian akinetic deficit. This effect is mimicked by apamin, a blocker of small conductance Ca2+-activated K+ (SK) channels, and blocked by CyPPA, a positive modulator of these channels, suggesting the involvement of SK channels in the bee venom antiparkinsonian action. In vivo electrophysiological recordings in the substantia nigra pars reticulata (basal ganglia output structure) showed no significant effect of BV on the mean neuronal discharge frequency or pathological bursting activity. In contrast, analyses of the neuronal responses evoked by motor cortex stimulation show that bee venom reverses the 6-OHDA- and neuroleptic-induced biases in the influence exerted by the direct inhibitory and indirect excitatory striatonigral circuits. These data provide the first evidence for a beneficial action of bee venom on the pathological functioning of the cortico-basal ganglia circuits underlying motor PD symptoms with potential relevance to the symptomatic treatment of this disease. PMID:26571268

  6. Secapin, a bee venom peptide, exhibits anti-fibrinolytic, anti-elastolytic, and anti-microbial activities.

    Science.gov (United States)

    Lee, Kwang Sik; Kim, Bo Yeon; Yoon, Hyung Joo; Choi, Yong Soo; Jin, Byung Rae

    2016-10-01

    Bee venom contains a variety of peptide constituents that have various biological, toxicological, and pharmacological actions. However, the biological actions of secapin, a venom peptide in bee venom, remain largely unknown. Here, we provide the evidence that Asiatic honeybee (Apis cerana) secapin (AcSecapin-1) exhibits anti-fibrinolytic, anti-elastolytic, and anti-microbial activities. The recombinant mature AcSecapin-1 peptide was expressed in baculovirus-infected insect cells. AcSecapin-1 functions as a serine protease inhibitor-like peptide that has inhibitory effects against plasmin, elastases, microbial serine proteases, trypsin, and chymotrypsin. Consistent with these functions, AcSecapin-1 inhibited the plasmin-mediated degradation of fibrin to fibrin degradation products, thus indicating the role of AcSecapin-1 as an anti-fibrinolytic agent. AcSecapin-1 also inhibited both human neutrophil and porcine pancreatic elastases. Furthermore, AcSecapin-1 bound to bacterial and fungal surfaces and exhibited anti-microbial activity against fungi and gram-positive and gram-negative bacteria. Taken together, our data demonstrated that the bee venom peptide secapin has multifunctional roles as an anti-fibrinolytic agent during fibrinolysis and an anti-microbial agent in the innate immune response. PMID:27208884

  7. Immunochemistry of apamin-bee venom neurotoxin - 1. Radioimmunoassay with apamin and its derivatives

    International Nuclear Information System (INIS)

    Antibodies against apamin, a neurotoxic polypeptide from bee venom were raised in rabbits by immunization with apamin or apamin-BSA conjugates. 3H-apamin or 125I-apamin were used in radioimmunoassay with anti-apamin for the detection of the apamin antigenic site. The inhibitory activity toward the labelled apamin-anti-apamin binding was maximal with unlabelled apamin and decreased in the range: apamin > Cys1,Lys4-disuccinilated apamin > Cys1, Lys4-diacetylated apamin > Cys1, Lys4-diacetylated apamin with carboxymethylated His18. Dipyrimidyl-Orn13, Orn14-apamin derivative almost had no inhibitory activity on labelled apamin binding emphasizing that Arg13,Arg14 are the most essential for the apamin topographic antigenic site. (author)

  8. Study of single dose test of Sweet Bee Venom in rats

    Directory of Open Access Journals (Sweden)

    Young Jin Kim

    2009-12-01

    Full Text Available Objectives: This study was performed to analyse single dose toxicity of pure melittin(Sweet Bee Venom-Sweet BV extracted from the bee venom by utilizing protein isolation method of gel filtration. Methods: All experiments were conducted at Biotoxtech, a non-clinical studies authorized institution, under the regulations of Good Laboratory Practice (GLP. Six weeks old female Sprague-Dawley rats were chosen for the pilot study and determined 30㎎/㎏ which is 4285 times higher than the clinical application dosage as the high dosage, followed by 15 and 7.5㎎/㎏ as mid and lose dosage, respectively. Equal amount of excipient to the Sweet BV experiment groups was administered as the control group. Results: 1. No mortality was witnessed in all of the experiment groups. 2. Hyperemia and movement disorder were observed around the area of administration in all groups, and higher occurrence in the higher dosage groups. Hyperemia and movement disorder diminished with elapsed time. 3. For the weight measurement, male groups showed larger reduction in weight in accordance with higher dosage. Female groups didn't s how significant changes. 4. To verify abnormalities of organs and tissues, cerebellum, cerebrum, liver, lung, kidney, and spinal nerves were removed and conducted histological observation with H-E staining. No abnormalities were detected in any of organs and tissues. 5. One female rat in the 30㎎/㎏ group had amputated toe near the administered area and histopathological finding was hemorrhage with inflammation. This is presumed as a secondary infection after the administration of Sweet BV. Conclusion: Above findings suggest Sweet BV is relatively s safe treatment medium. Further studies on the subject should be conducted to yield more concrete evidences.

  9. Study of single dose toxic test of Sweet Bee Venom in Beagle Dogs

    Directory of Open Access Journals (Sweden)

    Hye-Chul, Yoon

    2010-12-01

    Full Text Available Objectives : This study was performed to analyse single dose toxicity of Sweet Bee Venom(Sweet BV extracted from the bee venom in Beagle dogs. Methods : All experiments were conducted under the regulations of Good Laboratory Practice (GLP at Biotoxtech Company, a non-clinical study authorized institution. Male and female Beagle dogs of 5-6 months old were chosen for the pilot study of single dose toxicity of Sweet BV which was administered at the level of 9.0 ㎎/㎏ body weight which is 1300 times higher than the clinical application dosage as the high dosage, followed by 3.0 and 1.0 ㎎/㎏ as midium and low dosage, respectively. Equal amount of excipient(normal saline to the Sweet BV experiment groups was administered as the control group. Results : 1. No mortality was witnessed in all of the experiment groups. 2. Hyperemia and movement disorder were observed around the area of administration in all the experiment groups, and higher occurrence in the higher dosage treatment. 3. For weight measurement, Neither male nor female groups showed significant changes. 4. To verify abnormalities of organs and tissues, thigh muscle which treated with Sweet BV, brain, liver, lung, kidney, and spinal cords were removed and histologocal observation using H-E staining was conducted. In the histologocal observation of thigh muscle, cell infiltration, inflammation, degeneration, necrosis of muscle fiber, and fibrosis were found in both thigh tissue. And the changes depend on the dose of Sweet BV. But the other organs did not showed in any abnormality. 5. The maximum dose of Sweet BV in Beagle dogs were over 9 ㎎/㎏ in this study. Conclusions : The above findings of this study suggest that Sweet BV is a relatively safe treatment medium. Further studies on the toxicity of Sweet BV should be conducted to yield more concrete evidences.

  10. Experimental studies of validation and stability of Sweet Bee Venom using HPLC

    Directory of Open Access Journals (Sweden)

    Kye Sung, Kang

    2009-12-01

    Full Text Available Objectives : This study was conducted to confirm validation and stability of concentration analysis method of pure melittin (Sweet Bee Venom-Sweet BV extracted from the bee venom by utilizing protein isolation method of gel filtration. Methods : All experiments were conducted at Biotoxtech, a non-clinical studies authorized institution, under the regulations of Good Laboratory Practice (GLP. Standard solutions of melittin (SIGMA, USA and test substances were dispensed and were analyzed with HPLC for Sweet BV to secure the validation of analysis. Results : 1. Measurement of system suitability of Sweet BV satisfied criterion of below 3%. 2. Confirming Linearity of Sweet BV in 10-200㎍/㎖ solution yielded correlation coefficient (r of 0.995 and accuracy of 85-115% which satisfy criterion. 3. Measurement of Specificity of Sweet BV didn't yield any substance affecting the peak of test substances, but detected at 21.22min verified as the test substance. 4. Confirming Intra-day of Sweet BV, accuracy and precision of 0.1, 100㎍/㎖ were 105.70, 95.81 and 0.66, 0.73, respectively, satisfying both criteria of accuracy (85-115% and precision (within 10%. 5. To measure Stability in autosampler, all samples used in Intra-day reproducibility sat in the autosampler for five hours and were re-analyzed. Both variability and precision satisfied the criteria. 6. Homogeneity of Sweet BV (0.1, 100㎍/㎖ at upper, middle, and lower layers all satisfied the accuracy and precision criteria. 7. Stability of Sweet BV (0.1, 100㎍/㎖ at room temperature for four hours and refrigerated for 7 days all satisfied the criterion. 8. For the measurement of Quality control, QC samples measured on the first and eighth day all satisfied accuracy and precision criteria. Conclusion : Above experiment data satisfies validation and stability of concentration analysis method of Sweet BV.

  11. Intravenous Single Dose Toxicity of Sweet Bee Venom in Sprague-Dawley Rats

    Directory of Open Access Journals (Sweden)

    Kwang-Ho Lee

    2015-09-01

    Full Text Available Objectives: Anaphylactic shock can be fatal to people who become hypersensitive when bee venom pharmacopuncture (BVP is used. Thus, sweet bee venom (SBV was developed to reduce these allergic responses. SBV is almost pure melittin, and SBV has been reported to have fewer allergic responses than BVP. BVP has been administered only into acupoints or intramuscularly, but we thought that intravenous injection might be possible if SBV were shown to be a safe medium. The aim of this study is to evaluate the intravenous injection toxicity of SBV through a single-dose test in Sprague-Dawley (SD rats. Methods: Male and female 6-week-old SD rats were injected intravenously with SBV (high dosage: 1.0 mL/animal; medium dosage: 0.5 mL/animal; low dosage: 0.1 mL/animal. Normal saline was injected into the control group in a similar method. We conducted clinical observations, body weight measurements, and hematology, biochemistry, and histological observations. Results: No death was observed in any of the experimental groups. Hyperemia was observed in the high and the medium dosage groups on the injection day, but from next day, no general symptoms were observed in any of the experimental groups. No significant changes due to intravenous SBV injection were observed in the weights, in the hematology, biochemistry, and histological observations, and in the local tolerance tests. Conclusion: The results of this study confirm that the lethal dose of SBV is over 1.0 mL/animal in SD rats and that the intravenous injection of SBV is safe in SD rats.

  12. Sweet Bee Venom Pharmacopuncture May be Effective for Treating Sexual Dysfunction

    Directory of Open Access Journals (Sweden)

    Pavel Lee

    2014-09-01

    Full Text Available Sexual dysfunction (SD is a health problem which occurs during any phase of the sexual response cycle that keeps the individual or couple from experiencing satisfaction from the sexual activity. SD covers a wide variety of symptoms like in men, erectile dysfunction and premature or delayed ejaculation, in women, spasms of the vagina and pain with sexual intercourse, in both sexes, sexual desire and response. And pharmacopuncture, i.e. injection of subclinical doses of drugs, mostly herb medicine, in acupoints, has been adopted with successful results. This case report showed the effect of bee venom on SD. A 51-year-old male patient with SD, who had a past history of taking Western medication to treat his SD and who had previously undergone surgery on his lower back due to a herniated disc, received treatments using pharmacopuncture of sweet bee venom (SBV at Gwanwon (CV4, Hoeeum (CV1, Sinsu (BL23, and Gihaesu (BL24 for 20 days. Objectively, the patient showed improvement on most items on the International Index for Erectile Dysfunction (IIEF like 28 to 29 out of perfect score 30 for erectile function, 10 to 10 out of perfect score 10 for orgasmic function, 6 to 8 out of perfect score 10 for sexual desire, 10 to 13 out of perfect score 15 for satisfaction with intercourse, and 6 to 8 out of perfect score 10 for overall satisfaction; subjectively, his words, the tone of his voice and the look of confidence in his eyes all indicated improvement. Among the variety of effects of SBV pharmacopuncture, urogenital problems such as SD may be health problems that pharmacopuncture can treat effectively.

  13. Neuroprotective effects of bee venom acupuncture therapy against rotenone-induced oxidative stress and apoptosis.

    Science.gov (United States)

    Khalil, Wagdy K B; Assaf, Naglaa; ElShebiney, Shaimaa A; Salem, Neveen A

    2015-01-01

    Parkinson's disease (PD), the most common neurodegenerative movement disorder, is characterized by dopaminergic neurodegeneration, mitochondrial impairment, and oxidative stress. Exposure of animals to rotenone induces a range of responses characteristic of PD, including reactive oxygen species production and dopaminergic cell death. Although l-dopa is the drug of choice for improving core symptoms of PD, it is associated with involuntary movements. The current study was directed to evaluate the neuroprotective effect of bee venom acupuncture therapy (BVA) against rotenone-induced oxidative stress, neuroinflammation, and apoptosis in PD mouse model. Forty male Swiss mice were divided into four groups: (1) received saline solution orally and served as normal control, (2) received rotenone (1.5 mg/kg, s.c. every other day for 6 doses), (3) received rotenone concomitantly with l-dopa (25 mg/kg, daily, p.o. for 6 days), and finally (4) received rotenone concomitantly with BVA (0.02 ml once every 3 days for two weeks). Rotenone-treated mice showed impairment in locomotor behavior and a significant reduction in brain dopamine, serotonin, norepinephrine, GSH levels, and paraoxonase activity, whereas a significant increase was observed in brain malondialdehyde, tumor necrosis factor-α, interleukin-β levels besides DNA damage, and over-expression of caspase-3, Bax, and Bcl-2 genes. Significant improvement of the aforementioned parameters was demonstrated after BVA compared to l-dopa therapy. In conclusion, bee venom normalized all the neuroinflammatory and apoptotic markers and restored brain neurochemistry after rotenone injury. Therefore, BVA is a promising neuroprotective therapy for PD. PMID:25481089

  14. Synergistic Effects of Secretory Phospholipase A2 from the Venom of Agkistrodon piscivorus piscivorus with Cancer Chemotherapeutic Agents

    Directory of Open Access Journals (Sweden)

    Jennifer Nelson

    2013-01-01

    Full Text Available Healthy cells typically resist hydrolysis catalyzed by snake venom secretory phospholipase A2. However, during various forms of programmed cell death, they become vulnerable to attack by the enzyme. This observation raises the question of whether the specificity of the enzyme for dying cells could be used as a strategy to eliminate tumor cells that have been intoxicated but not directly killed by chemotherapeutic agents. This idea was tested with S49 lymphoma cells and a broad range of antineoplastic drugs: methotrexate, daunorubicin, actinomycin D, and paclitaxel. In each case, a substantial population of treated cells was still alive yet vulnerable to attack by the enzyme. Induction of cell death by these agents also perturbed the biophysical properties of the membrane as detected by merocyanine 540 and trimethylammonium-diphenylhexatriene. These results suggest that exposure of lymphoma cells to these drugs universally causes changes to the cell membrane that render it susceptible to enzymatic attack. The data also argue that the snake venom enzyme is not only capable of clearing cell corpses but can aid in the demise of tumor cells that have initiated but not yet completed the death process.

  15. Activation of phospholipase A2 by temporin B: Formation of antimicrobial peptide-enzyme amyloid-type cofibrils

    NARCIS (Netherlands)

    Code, Christian; Domanov, Y.A.; Killian, J.A.; Kinnunen, P.K.J.

    2009-01-01

    Phospholipases A2 have been shown to be activated in a concentration dependent manner by a number of antimicrobial peptides, including melittin, magainin 2, indolicidin, and temporins B and L. Here we used fluorescently labelled bee venom PLA2 (PLA2D) and the saturated phospholipid substrate 1,2-dip

  16. Isolation of melittin from bee venom and evaluation of its effect on proliferation of gastric cancer cells

    Directory of Open Access Journals (Sweden)

    Mahmoodzadeh A

    2013-03-01

    Full Text Available Background: Gastric cancer (GC is one of the most common cancers worldwide and in Iran. Conventional therapies are surgery and chemotherapy. Current studies are evaluating natural compounds in inhibiting growth of cancer cell. In this study isolated peptide melittin with 26 amino acids from bee venom and its impact on the viability and proliferation of gastric cancer cells was investigated. Methods: At first melittin was purified from honeybee venom using a reversed-phase high performance liquid chromatography (RP- HPLC and C18 column. In order to investigate whether melittin, a 26 amino acids peptide which is the main components of honeybee venom, inhibits proliferation of human gastric adenocarcinoma cell line (AGS cells, MTT ((3-(4, 5-dimethylthiazol-2-yl-2, 5- diphenyltetrazolium bromide assay was performed. Hemolytic assay carried out in order to confirm the biologic activity of the isolated melittin. AGS cells were plated in a 96-well plate and treated with serially diluted concentrations of melittin for 6 and 12 hours. The mortality of the cells was measured via MTT assay at 540 nm.Results: The obtained chromatogram from RP-HPLC showed that melittin comprises 50% of the studied bee venom. SDS-PAGE analysis of melittin fraction confirmed purity of isolated melittin. Hemolytic activity assay indicates that isolated melittin shows a strong hemolytic activity (HD50=0.5. MTT assay showed that melittin strongly inhibits proliferation of gastric cancer cells at concentrations more than 2µg/ml. This inhibitory effect is dependent to melittin concentration and incubation time.Conclusion: This study provides evidence that melittin inhibits proliferation of the gastric cancer cells. Results showed that isolated melittin from honey bee venom have cytotoxic effect on AGS cell line with a trend of increasing cytotoxicity with increasing concentration and incubation time.

  17. Interaction of bee venom melittin with zwitterionic and negatively charged phospholipid bilayers : a spin-label electron spin resonance study

    OpenAIRE

    Kleinschmidt, Jörg H.; Mahaney, James E.; Thomas, David D.; Marsh, Derek

    1997-01-01

    Electron spin resonance (ESR) spectroscopy was used to study the penetration and interaction of bee venom melittin with dimyristoylphosphatidylcholine (DMPC) and ditetradecylphosphatidylglycerol (DTPG) bilayer membranes. Melittin is a surface-active, amphipathic peptide and serves as a useful model for a variety of membrane interactions, including those of presequences and signal peptides, as well as the charged subdomain of the cardiac regulatory protein phospholamban. Derivatives of phospha...

  18. Pharmacological Alternatives for the Treatment of Neurodegenerative Disorders: Wasp and Bee Venoms and Their Components as New Neuroactive Tools

    OpenAIRE

    Juliana Silva; Victoria Monge-Fuentes; Flávia Gomes; Kamila Lopes; Lilian dos Anjos; Gabriel Campos; Claudia Arenas; Andréia Biolchi; Jacqueline Gonçalves; Priscilla Galante; Leandro Campos; Márcia Mortari

    2015-01-01

    Neurodegenerative diseases are relentlessly progressive, severely impacting affected patients, families and society as a whole. Increased life expectancy has made these diseases more common worldwide. Unfortunately, available drugs have insufficient therapeutic effects on many subtypes of these intractable diseases, and adverse effects hamper continued treatment. Wasp and bee venoms and their components are potential means of managing or reducing these effects and provide new alternatives for...

  19. Anti-Inflammatory Activity of Bee Venom in BV2 Microglial Cells: Mediation of MyD88-Dependent NF-κB Signaling Pathway.

    Science.gov (United States)

    Im, Eun Ju; Kim, Su Jung; Hong, Seung Bok; Park, Jin-Kyu; Rhee, Man Hee

    2016-01-01

    Bee venom has long been used as a traditional folk medicine in Korea. It has been reportedly used for the treatment of arthritis, cancer, and inflammation. Although its anti-inflammatory activity in lipopolysaccharide- (LPS-) stimulated inflammatory cells has been reported, the exact mechanism of its anti-inflammatory action has not been fully elucidated. Therefore, the aim of this study was to investigate the anti-inflammatory mechanism of bee venom in BV2 microglial cells. We first investigated whether NO production in LPS-activated BV2 cells was inhibited by bee venom, and further iNOS mRNA and protein expressions were determined. The mRNA and protein levels of proinflammatory cytokines were examined using semiquantitative RT-PCR and immunoblotting, respectively. Moreover, modulation of the transcription factor NF-κB by bee venom was also investigated using a luciferase assay. LPS-induced NO production in BV2 microglial cells was significantly inhibited in a concentration-dependent manner upon pretreatment with bee venom. Bee venom markedly reduced the mRNA expression of COX-2, TNF-α, IL-1β, and IL-6 and suppressed LPS-induced activation of MyD88 and IRAK1 and phosphorylation of TAK1. Moreover, NF-κB translocation by IKKα/β phosphorylation and subsequent IκB-α degradation were also attenuated. Thus, collectively, these results indicate that bee venom exerts its anti-inflammatory activity via the IRAK1/TAK1/NF-κB signaling pathway. PMID:27563334

  20. Effect of pretreatment with venom of Apis mellifera bees on the yield of gamma-ray induced chromosome aberrations in human blood lymphocytes

    International Nuclear Information System (INIS)

    Venom of the honey bee Apis mellifera induced a protective effect against the induction of dicentric chromosomes by gamma radiation (2.0 Gy) in human peripheral blood lymphocytes when the cultures were treated with 0.00015 μl venom/1 ml medium 6 h before irradiation. In cultures to which the venom was added immediately before irradiation with 0.25, 1.0 and 2.0 Gy, no significant differences in number of dicentric chromosomes induced was observed when compared to cultures submitted to irradiation only. The venom did not induce clastogenic effects nor did it increase the frequency of sister chromatid exchanges. (author)

  1. Biochemical Characterization, Action on Macrophages, and Superoxide Anion Production of Four Basic Phospholipases A2 from Panamanian Bothrops asper Snake Venom

    Directory of Open Access Journals (Sweden)

    Aristides Quintero Rueda

    2013-01-01

    Full Text Available Bothrops asper (Squamata: Viperidae is the most important venomous snake in Central America, being responsible for the majority of snakebite accidents. Four basic PLA2s (pMTX-I to -IV were purified from crude venom by a single-step chromatography using a CM-Sepharose ion-exchange column (1.5 × 15 cm. Analysis of the N-terminal sequence demonstrated that pMTX-I and III belong to the catalytically active Asp49 phospholipase A2 subclass, whereas pMTX-II and IV belong to the enzymatically inactive Lys49 PLA2s-like subclass. The PLA2s isolated from Panama Bothrops asper venom (pMTX-I, II, III, and IV are able to induce myotoxic activity, inflammatory reaction mainly leukocyte migration to the muscle, and induce J774A.1 macrophages activation to start phagocytic activity and superoxide production.

  2. Biochemical characterization, action on macrophages, and superoxide anion production of four basic phospholipases A2 from Panamanian Bothrops asper snake venom.

    Science.gov (United States)

    Rueda, Aristides Quintero; Rodríguez, Isela González; Arantes, Eliane C; Setúbal, Sulamita S; Calderon, Leonardo de A; Zuliani, Juliana P; Stábeli, Rodrigo G; Soares, Andreimar M

    2013-01-01

    Bothrops asper (Squamata: Viperidae) is the most important venomous snake in Central America, being responsible for the majority of snakebite accidents. Four basic PLA2s (pMTX-I to -IV) were purified from crude venom by a single-step chromatography using a CM-Sepharose ion-exchange column (1.5 × 15 cm). Analysis of the N-terminal sequence demonstrated that pMTX-I and III belong to the catalytically active Asp49 phospholipase A2 subclass, whereas pMTX-II and IV belong to the enzymatically inactive Lys49 PLA2s-like subclass. The PLA2s isolated from Panama Bothrops asper venom (pMTX-I, II, III, and IV) are able to induce myotoxic activity, inflammatory reaction mainly leukocyte migration to the muscle, and induce J774A.1 macrophages activation to start phagocytic activity and superoxide production. PMID:23509779

  3. Molecular modeling and snake venom phospholipase A2 inhibition by phenolic compounds: Structure-activity relationship.

    Science.gov (United States)

    Alam, Md Iqbal; Alam, Mohammed A; Alam, Ozair; Nargotra, Amit; Taneja, Subhash Chandra; Koul, Surrinder

    2016-05-23

    In our earlier study, we have reported that a phenolic compound 2-hydroxy-4-methoxybenzaldehyde from Janakia arayalpatra root extract was active against Viper and Cobra envenomations. Based on the structure of this natural product, libraries of synthetic structurally variant phenolic compounds were studied through molecular docking on the venom protein. To validate the activity of eight selected compounds, we have tested them in in vivo and in vitro models. The compound 21 (2-hydroxy-3-methoxy benzaldehyde), 22 (2-hydroxy-4-methoxybenzaldehyde) and 35 (2-hydroxy-3-methoxybenzylalcohol) were found to be active against venom-induced pathophysiological changes. The compounds 20, 15 and 35 displayed maximum anti-hemorrhagic, anti-lethal and PLA2 inhibitory activity respectively. In terms of SAR, the presence of a formyl group in conjunction with a phenolic group was seen as a significant contributor towards increasing the antivenom activity. The above observations confirmed the anti-venom activity of the phenolic compounds which needs to be further investigated for the development of new anti-snake venom leads. PMID:26986086

  4. Study of four week repeated dose toxic test of Sweet Bee Venom in Beagle Dogs

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    Jae-Seuk Park

    2010-12-01

    Full Text Available Objectives: This study was performed to analyse four week repeated dose toxicity of Sweet Bee Venom(Sweet BV extracted from the bee venom in Beagle dogs. Methods: All experiments were conducted under the regulations of Good Laboratory Practice (GLP at Biotoxtech Company, a non-clinical study authorized institution. Male and female Beagle dogs of 5-6 months old were chosen for the pilot study of four week repeated dose toxicity of Sweet BV which was administered at the level of 0.56㎎/㎏ body weight which is eighty times higher than the clinical application dosage as the high dosage, followed by 0.28 and 0.14㎎/㎏ as midium and low dosage, respectively. Equal amount of excipient(normal saline to the Sweet BV experiment groups was administered as the control group every day for four weeks. Results: 1. No mortality was witnessed in all of the experiment groups. 2. All experiment groups were appealed pain sense in the treating time compared to the control group, and hyperemia and movement disorder were observed around the area of administration in all experiment groups, and higher occurrence in the higher dosage treatment. 3. For weight measurement, Neither male nor female groups showed significant changes. 4. In the urine analysis, CBC and biochemistry didn't show any significant changes in the experiment groups compared with control group. 5. For weight measurement of organs, experiment groups didn't show any significant changes compared with control group. 6. To verify abnormalities of organs and tissues, thigh muscle which treated with Sweet BV, cerebrum, liver, lung, kidney, and spinal cords were removed and conducted histologocal observation with H-E staining. In the histologocal observation of thigh muscle, cell infiltration, inflammatory, degeneration, necrosis of muscle fiber, and fibrosis were found in both thigh tissue. And the changes were depend on the dose of Sweet BV. But another organs were not detected in any abnormalities. 7

  5. Systemic Immediate Hypersensitive Reactions after Treatment with Sweet Bee Venom: A Case Report

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    NaYoung Jo

    2015-12-01

    Full Text Available Objectives: A previous study showed that bee venom (BV could cause anaphylaxis or other hypersensitivity reactions. Although hypersensitivity reactions due to sweet bee venom (SBV have been reported, SBV has been reported to be associated with significantly reduced sensitization compared to BV. Although no systemic immediate hypersensitive response accompanied by abnormal vital signs has been reported with respect to SBV, we report a systemic immediate hypersensitive response that we experienced while trying to use SBV clinically. Methods: The patient had undergone BV treatment several times at other Oriental medicine clinics and had experienced no adverse reactions. She came to acupuncture & moxibustion department at Semyung university hospital of Oriental medicine (Je-cheon, Korea complaining of facial hypoesthesia and was treated using SBV injections, her first SBV treatment. SBV, 0.05 cc, was injected at each of 8 acupoints, for a total of 0.40 cc: Jichang (ST4, Daeyeong (ST5, Hyeopgeo (ST6, Hagwan (ST7, Yepung (TE17, Imun (TE21, Cheonghoe (GB2, and Gwallyeo (SI18. Results: The patient showed systemic immediate hypersensitive reactions. The main symptoms were abdominal pain, nausea and perspiration, but common symptoms associated with hypersensitivity, such as edema, were mild. Abdominal pain was the most long-lasting symptom and was accompanied by nausea. Her body temperature decreased due to sweating. Her diastolic blood pressure could not be measured on three occasions. She remained alert, though the symptoms persisted. The following treatments were conducted in sequence; intramuscular epinephrine, 1 mg/mL, injection, intramuscular dexamethasone, 5 mg/mL, injection, intramuscular buscopan, 20 mg/mL, injection, oxygen (O2 inhalation therapy, 1 L/minutes, via a nasal prong, and intravascular injection of normal saline, 1 L. After 12 hours of treatment, the symptoms had completely disappeared. Conclusion: This case shows that the use of SBV

  6. Honeybee venom proteome profile of queens and winter bees as determined by a mass spectrometric approach

    OpenAIRE

    Danneels, Ellen L.; Matthias Van Vaerenbergh; Griet Debyser; Bart Devreese; Dirk C de Graaf

    2015-01-01

    Venoms of invertebrates contain an enormous diversity of proteins, peptides, and other classes of substances. Insect venoms are characterized by a large interspecific variation resulting in extended lists of venom compounds. The venom composition of several hymenopterans also shows different intraspecific variation. For instance, venom from different honeybee castes, more specifically queens and workers, shows quantitative and qualitative variation, while the environment, like seasonal change...

  7. Evaluation of snake venom phospholipase A{sub 2}: hydrolysis of non-natural esters

    Energy Technology Data Exchange (ETDEWEB)

    Pirolla, Renan A.S.; Baldasso, Paulo A.; Marangoni, Sergio; Moran, Paulo J.S.; Rodrigues, Jose Augusto R., E-mail: jaugusto@iqm.unicamp.b [University of Campinas (UNICAMP), SP (Brazil). Inst. of Chemistry. Dept. of Organic Chemistry

    2011-07-01

    Phospholipase A2 from the rattlesnake Crotalus durissus terrificus was employed for the first time to test its enantioselectivity on the hydrolysis of different non-natural esters. It was observed that the structure of this small enzyme is restrictive in the choice of its lipase action with non-natural substrates. Two forms of the enzyme were used; free and as its cross-linked enzyme aggregate (CLEA). With all substrates, the free enzyme showed activity similar to the CLEA preparation. The advantage of the CLEA phospholipase is the possibility to reuse it in several consecutive reactions without a decrease of activity and selectivity with good but higher yields and ee than with the free enzyme. (author)

  8. Evaluation of snake venom phospholipase A2: hydrolysis of non-natural esters

    International Nuclear Information System (INIS)

    Phospholipase A2 from the rattlesnake Crotalus durissus terrificus was employed for the first time to test its enantioselectivity on the hydrolysis of different non-natural esters. It was observed that the structure of this small enzyme is restrictive in the choice of its lipase action with non-natural substrates. Two forms of the enzyme were used; free and as its cross-linked enzyme aggregate (CLEA). With all substrates, the free enzyme showed activity similar to the CLEA preparation. The advantage of the CLEA phospholipase is the possibility to reuse it in several consecutive reactions without a decrease of activity and selectivity with good but higher yields and ee than with the free enzyme. (author)

  9. Crystal structure of myotoxin-II: a myotoxic phospholipase A2 - homologue from Bothrops moojeni venom

    International Nuclear Information System (INIS)

    Full text. Phospho lipases A2 (PLA2; E C 3.1.1.4, phosphatides s n-2 acyl hydrolases) hydrolysis the s n-2 ester bond of phospholipids showing enhanced activity at lamellar or membrane surfaces. Intracellular PLA2 s are involved at phospholipid metabolism and signal transduction, whereas extracellular PLA2 s are found in mammalian pancreatic juices, the venoms of snakes, lizards and insects. Based on their high primary sequence similarity, extracellular PLA2 s are separated into Classes I, II and III. Class II PLA2 s are found in snake venoms of Crotalidae an Viperidae species, and include the sub-family of Lys PLA2 s homologue. he coordination of the Ca2+ ion in the PLA2 calcium-binding loop includes and aspartate at position 49. In the catalytically active PLA2 s, this calcium ion plays a critical role in the stabilization of the tetrahedral transition state intermediate in the catalytic mechanism. The conservative substitution Asp49-Lys results in a decreased calcium affinity with a concomitant loss of catalytic activity, and naturally occurring PLA2 s-homologues showing the same substitution are catalytically inactive. However, the Lys PLA2 s possess cytolytic and myotoxic activities and furthermore retain the ability to disrupt the integrity of both plasma membranes and model lipid layers by a ca2+-independent mechanism for which there is no evidence of lipid hydrolysis. Lys 49 PLA2 homologues have been isolated from several Bothrops spp. venoms including B. moojeni. Therefore, in order to improve our understanding of the molecular basis of the myotoxic and Ca2+ independent membrane damaging activities we have determined the crystal structure of MjTX-II, a Lys 49 homologue from the venom of B. moojeni. The model presented has been determined at 2.0 A resolution and refined to a crystallographic residual of 19.7% (Rfree=28.1%). (author)

  10. Varespladib (LY315920) Appears to Be a Potent, Broad-Spectrum, Inhibitor of Snake Venom Phospholipase A2 and a Possible Pre-Referral Treatment for Envenomation.

    Science.gov (United States)

    Lewin, Matthew; Samuel, Stephen; Merkel, Janie; Bickler, Philip

    2016-01-01

    Snakebite remains a neglected medical problem of the developing world with up to 125,000 deaths each year despite more than a century of calls to improve snakebite prevention and care. An estimated 75% of fatalities from snakebite occur outside the hospital setting. Because phospholipase A2 (PLA2) activity is an important component of venom toxicity, we sought candidate PLA2 inhibitors by directly testing drugs. Surprisingly, varespladib and its orally bioavailable prodrug, methyl-varespladib showed high-level secretory PLA2 (sPLA2) inhibition at nanomolar and picomolar concentrations against 28 medically important snake venoms from six continents. In vivo proof-of-concept studies with varespladib had striking survival benefit against lethal doses of Micrurus fulvius and Vipera berus venom, and suppressed venom-induced sPLA2 activity in rats challenged with 100% lethal doses of M. fulvius venom. Rapid development and deployment of a broad-spectrum PLA2 inhibitor alone or in combination with other small molecule inhibitors of snake toxins (e.g., metalloproteases) could fill the critical therapeutic gap spanning pre-referral and hospital setting. Lower barriers for clinical testing of safety tested, repurposed small molecule therapeutics are a potentially economical and effective path forward to fill the pre-referral gap in the setting of snakebite. PMID:27571102

  11. Varespladib (LY315920 Appears to Be a Potent, Broad-Spectrum, Inhibitor of Snake Venom Phospholipase A2 and a Possible Pre-Referral Treatment for Envenomation

    Directory of Open Access Journals (Sweden)

    Matthew Lewin

    2016-08-01

    Full Text Available Snakebite remains a neglected medical problem of the developing world with up to 125,000 deaths each year despite more than a century of calls to improve snakebite prevention and care. An estimated 75% of fatalities from snakebite occur outside the hospital setting. Because phospholipase A2 (PLA2 activity is an important component of venom toxicity, we sought candidate PLA2 inhibitors by directly testing drugs. Surprisingly, varespladib and its orally bioavailable prodrug, methyl-varespladib showed high-level secretory PLA2 (sPLA2 inhibition at nanomolar and picomolar concentrations against 28 medically important snake venoms from six continents. In vivo proof-of-concept studies with varespladib had striking survival benefit against lethal doses of Micrurus fulvius and Vipera berus venom, and suppressed venom-induced sPLA2 activity in rats challenged with 100% lethal doses of M. fulvius venom. Rapid development and deployment of a broad-spectrum PLA2 inhibitor alone or in combination with other small molecule inhibitors of snake toxins (e.g., metalloproteases could fill the critical therapeutic gap spanning pre-referral and hospital setting. Lower barriers for clinical testing of safety tested, repurposed small molecule therapeutics are a potentially economical and effective path forward to fill the pre-referral gap in the setting of snakebite.

  12. A phospholipase A₂ isolated from Lachesis muta snake venom increases the survival of retinal ganglion cells in vitro.

    Science.gov (United States)

    da Silva Cunha, Karinne Cristinne; Fuly, André Lopes; de Araujo, Elizabeth Giestal

    2011-03-15

    We have previously showed that a phospholipase A₂ isolated from Lachesis muta snake venom and named LM-PLA₂-I displayed particular biological activities, as hemolysis, inhibition on platelet aggregation, edema induction and myotoxicity. In the present work, we evaluated the effect of LM-PLA₂-I on the survival of axotomized rat retinal ganglion cells kept in vitro, as well as its mechanism of action. Our results clearly showed that treatment with LM-PLA₂-I increased the survival of ganglion cells (100% when compared to control cultures) and the treatment of LM-PLA₂-I with p-bromophenacyl bromide abolished this effect. This result indicates that the effect of LM-PLA₂-I on ganglion cell survival is entirely dependent on its enzymatic activity and the generation of lysophosphatidylcholine (LPC) may be a prerequisite to the observed survival. In fact, commercial LPC mimicked the effect of LM-PLA₂-I upon ganglion cell survival. To investigate the mechanism of action of LM-PLA₂-I, cultures were treated with chelerythrine chloride, BAPTA-AM, rottlerin and also with an inhibitor of c-junc kinase (JNKi). Our results showed that rottlerin and JNK inhibitor abolished the LM-PLA₂-I on ganglion cell survival. Taken together, our results showed that LM-PLA₂-I and its enzymatic product, LPC promoted survival of retinal ganglion cells through the protein kinase C pathway and strongly suggest a possible role of the PLA₂ enzyme and LPC in controlling the survival of axotomized neuronal cells. PMID:21223976

  13. Combined Effects of Bee Venom Acupuncture and Morphine on Oxaliplatin-Induced Neuropathic Pain in Mice

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    Woojin Kim

    2016-01-01

    Full Text Available Oxaliplatin, a chemotherapeutic drug for colorectal cancer, induces severe peripheral neuropathy. Bee venom acupuncture (BVA has been used to attenuate pain, and its effect is known to be mediated by spinal noradrenergic and serotonergic receptors. Morphine is a well-known opioid used to treat different types of pain. Here, we investigated whether treatment with a combination of these two agents has an additive effect on oxaliplatin-induced neuropathic pain in mice. To assess cold and mechanical allodynia, acetone and von Frey filament tests were used, respectively. Significant allodynia signs were observed three days after an oxaliplatin injection (6 mg/kg, i.p.. BVA (0.25, 1, and 2.5 mg/kg, s.c., ST36 or morphine (0.5, 2, and 5 mg/kg, i.p. alone showed dose-dependent anti-allodynic effects. The combination of BVA and morphine at intermediate doses showed a greater and longer effect than either BVA or morphine alone at the highest dose. Intrathecal pretreatment with the opioidergic (naloxone, 20 μg or 5-HT3 (MDL-72222, 15 μg receptor antagonist, but not with α2-adrenergic (idazoxan, 10 μg receptor antagonist, blocked this additive effect. Therefore, we suggest that the combination effect of BVA and morphine is mediated by spinal opioidergic and 5-HT3 receptors and this combination has a robust and enduring analgesic action against oxaliplatin-induced neuropathic pain.

  14. Effects of Bee Venom on Glutamate-Induced Toxicity in Neuronal and Glial Cells

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    Sang Min Lee

    2012-01-01

    Full Text Available Bee venom (BV, which is extracted from honeybees, is used in traditional Korean medical therapy. Several groups have demonstrated the anti-inflammatory effects of BV in osteoarthritis both in vivo and in vitro. Glutamate is the predominant excitatory neurotransmitter in the central nervous system (CNS. Changes in glutamate release and uptake due to alterations in the activity of glutamate transporters have been reported in many neurodegenerative diseases, including Parkinson's disease, Alzheimer's disease, and amyotrophic lateral sclerosis. To assess if BV can prevent glutamate-mediated neurotoxicity, we examined cell viability and signal transduction in glutamate-treated neuronal and microglial cells in the presence and absence of BV. We induced glutamatergic toxicity in neuronal cells and microglial cells and found that BV protected against cell death. Furthermore, BV significantly inhibited the cellular toxicity of glutamate, and pretreatment with BV altered MAP kinase activation (e.g., JNK, ERK, and p38 following exposure to glutamate. These findings suggest that treatment with BV may be helpful in reducing glutamatergic cell toxicity in neurodegenerative diseases.

  15. Effects of Bee Venom Acupuncture on the Rehabilitation and Quality of Life in Rheumatoid Arthritis Patients

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    Lee Sang-Hoon

    2002-12-01

    Full Text Available Objective: To evaluate the effects of bee venom acupuncture(BVA on the rehabilitation and quality of life in rheumatoid arthritis(RA patients Methods: Patients with RA were treated with the BVA therapy twice a week for 3 months. Tender joint counts, swollen joint counts, morning stiffness, Erythrocyte Sedimentation Rate(ESR, C-reactive protein(CRP, patient global assessment, physician global assessment, Korean health assessment questionnaire(KHAQ were estimated and analyzed before and after BVA therapy. Results: Tender joint counts, swollen joint counts, morning stiffness showed significant decrease after BVA therapy. But, as acute inflammatory reactants, ESR showed no significant difference and CRP showed significant increase after BVA therapy. Patient global assessment, physician global assessment, and KHAQ index showed significant improvement after BVA therapy. Conclusions: BVA therapy can improve rehabilitation and health-related quality of life in RA patients as well as clinical symptoms and signs. Further study is required in more population with large scale including acute inflammatory reaction of BVA therapy.

  16. Combined Cytogenotoxic Effects of Bee Venom and Bleomycin on Rat Lymphocytes: An In Vitro Study

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    Yasmina M. Abd-Elhakim

    2014-01-01

    Full Text Available This study was carried out to determine the cytotoxic and genotoxic effects of bee venom (BV and/or the chemotherapeutic agent bleomycin (BLM on healthy isolated rat lymphocytes utilizing morphometric and molecular techniques. Using the Ficoll-Histopaque density gradient centrifugation technique, lymphocytes were isolated, divided into groups, and subjected to BV and/or BLM at incubation medium concentrations of 10 or 20 μg/mL respectively for 24 and 72 hrs. An MTT assay and fluorescent microscopy examinations were used to assess the cytotoxic effects. To determine the predominant type of BV and/or BLM-induced cell death, LDH release assay was employed beside quantitative expression analyses of the apoptosis-related genes (Caspase-3 and Bcl-2. The genotoxic effects of the tested compounds were evaluated via DNA fragmentation assay. The results of these assays demonstrated that BV potentiates BLM-induced cytotoxicity through increased LDH release and diminished cell viability. Nevertheless, BV significantly inhibited the BLM-induced DNA damage. The results verify that BV significantly attenuates the genotoxic effects of BLM on noncancerous isolated rat lymphocytes but does not diminish BLM cytotoxicity.

  17. Effects of Bee Venom Acupuncture on Surgically Induced Endometriosis in Rats

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    Yong-Hyun Lee

    2006-02-01

    Full Text Available Purpose : Bee Venom Acupuncture(BVA is known to affect inflammation and immune system. This study examined the macroscopic, hormonal and immunological effects of BVA on rats with surgically induced endometriosis. Method : Endometrial tissue was implanted in the serosal wall of the small intestine in rats. The rats were divided randomly into an experimental and control group. The experimental group was treated with BVA injection on kwanwon(CV4 three times per week, and the control group was given an oral dose of normal saline every day. 6 weeks later, the size of the ectopic uterine tissue was estimated, and the serum progesterone, estradiol and cytokine(TNF-α, IL-2, IL-4, IL-6, IL-10 concentrations were analyzed. Result : The size of the ectopic uterine implants in the experimental group was much smaller than that in the control group. The estradiol, IL-2 concentrations were significantly lower and the IL-6, IL-10 concentrations were significantly higher in the serum of the experimental group than in the control group. there was no significant difference in the concentration of the other cytokine. Conclusion : These results suggest that BVA is an effective treatment for endometriosis.

  18. Combined Effects of Bee Venom Acupuncture and Morphine on Oxaliplatin-Induced Neuropathic Pain in Mice.

    Science.gov (United States)

    Kim, Woojin; Kim, Min Joon; Go, Donghyun; Min, Byung-Il; Na, Heung Sik; Kim, Sun Kwang

    2016-02-01

    Oxaliplatin, a chemotherapeutic drug for colorectal cancer, induces severe peripheral neuropathy. Bee venom acupuncture (BVA) has been used to attenuate pain, and its effect is known to be mediated by spinal noradrenergic and serotonergic receptors. Morphine is a well-known opioid used to treat different types of pain. Here, we investigated whether treatment with a combination of these two agents has an additive effect on oxaliplatin-induced neuropathic pain in mice. To assess cold and mechanical allodynia, acetone and von Frey filament tests were used, respectively. Significant allodynia signs were observed three days after an oxaliplatin injection (6 mg/kg, i.p.). BVA (0.25, 1, and 2.5 mg/kg, s.c., ST36) or morphine (0.5, 2, and 5 mg/kg, i.p.) alone showed dose-dependent anti-allodynic effects. The combination of BVA and morphine at intermediate doses showed a greater and longer effect than either BVA or morphine alone at the highest dose. Intrathecal pretreatment with the opioidergic (naloxone, 20 μg) or 5-HT3 (MDL-72222, 15 μg) receptor antagonist, but not with α2 adrenergic (idazoxan, 10 μg) receptor antagonist, blocked this additive effect. Therefore, we suggest that the combination effect of BVA and morphine is mediated by spinal opioidergic and 5-HT3 receptors and this combination has a robust and enduring analgesic action against oxaliplatin-induced neuropathic pain. PMID:26805884

  19. Anti-Fibrotic Effect of Natural Toxin Bee Venom on Animal Model of Unilateral Ureteral Obstruction

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    Hyun Jin An

    2015-05-01

    Full Text Available Progressive renal fibrosis is the final common pathway for all kidney diseases leading to chronic renal failure. Bee venom (BV has been widely used as a traditional medicine for various diseases. However, the precise mechanism of BV in ameliorating the renal fibrosis is not fully understood. To investigate the therapeutic effects of BV against unilateral ureteral obstruction (UUO-induced renal fibrosis, BV was given intraperitoneally after ureteral ligation. At seven days after UUO surgery, the kidney tissues were collected for protein analysis and histologic examination. Histological observation revealed that UUO induced a considerable increase in the number of infiltrated inflammatory cells. However, BV treatment markedly reduced these reactions compared with untreated UUO mice. The expression levels of TNF-α and IL-1β were significantly reduced in BV treated mice compared with UUO mice. In addition, treatment with BV significantly inhibited TGF-β1 and fibronectin expression in UUO mice. Moreover, the expression of α-SMA was markedly withdrawn after treatment with BV. These findings suggest that BV attenuates renal fibrosis and reduces inflammatory responses by suppression of multiple growth factor-mediated pro-fibrotic genes. In conclusion, BV may be a useful therapeutic agent for the prevention of fibrosis that characterizes progression of chronic kidney disease.

  20. A Case Report of Intra-articular Bee Venom Pharmacopuncture combining with oriental medical treatment for Acute Traumatic Partial Tear of Meniscus.

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    Lee Jae-Hoon

    2010-12-01

    Full Text Available This case was report of intra-articular bee venom pharmacopuncture injection on the patient with Acute Traumatic Partial tear of meniscus. We used intra-articular bee venom pharmacopuncture injection to Acute Traumatic Partial tear of meniscus diagnosed by symptoms and MR imaging. Be under treatment if necessary we prescribed herbal medication and physiotherapy. The state of patient was measured by Visual Analog Scale(VAS and Walking time and Western Ontario and McMaster Universities(WOMAC Index score. After several times of treatments, noticeable reduction of pain was measured and increased time of walking on floor and decreased WOMAC score. This results suggest that intra-articular bee venom pharmacopuncture injection are effective to treatments of Acute Traumatic Partial tear of meniscus.

  1. Crystallization and preliminary X-ray crystallographic studies of a Lys49-phospholipase A2 homologue from Bothrops pirajai venom complexed with rosmarinic acid

    International Nuclear Information System (INIS)

    PrTX-I, a noncatalytic and myotoxic Lys49-phospholipase A2 from B. pirajai venom, was cocrystallized with the inhibitor rosmarinic acid from C. verbenacea. The crystals diffracted X-rays to 1.8 Å resolution and the structure was solved, indicating a remarkable electronic density for the ligand at the entrance to the hydrophobic channel. PrTX-I, a noncatalytic and myotoxic Lys49-phospholipase A2 from Bothrops pirajai venom, was crystallized in the presence of the inhibitor rosmarinic acid (RA). This is the active compound in the methanolic extract of Cordia verbenacea, a plant that is largely used in Brazilian folk medicine. The crystals diffracted X-rays to 1.8 Å resolution and the structure was solved by molecular-replacement techniques, showing electron density that corresponds to RA molecules at the entrance to the hydrophobic channel. The crystals belong to space group P212121, indicating conformational changes in the structure after ligand binding: the crystals of all apo Lys49-phospholipase A2 structures belong to space group P3121, while the crystals of complexed structures belong to space groups P21 or P212121

  2. Crystallization and preliminary X-ray diffraction analysis of a Lys49-phospholipase A2 complexed with caffeic acid, a molecule with inhibitory properties against snake venoms

    International Nuclear Information System (INIS)

    Piratoxin I, a noncatalytic and myotoxic Lys49-phospholipase A2 from B. pirajai venom, was cocrystallized with the inhibitor caffeic acid and a data set was collected to a resolution of 1.65 Å. The electron-density map unambiguously indicated that three inhibitor molecules interact with the C-terminus of the protein. Phospholipases A2 (PLA2s) are one of the main components of bothropic venoms; in addition to their phospholipid hydrolysis action, they are involved in a wide spectrum of pharmacological activities, including neurotoxicity, myotoxicity and cardiotoxicity. Caffeic acid is an inhibitor that is present in several plants and is employed for the treatment of ophidian envenomations in the folk medicine of many developing countries; as bothropic snake bites are not efficiently neutralized by conventional serum therapy, it may be useful as an antivenom. In this work, the cocrystallization and preliminary X-ray diffraction analysis of the Lys49-PLA2 piratoxin I from Bothrops pirajai venom in the presence of the inhibitor caffeic acid (CA) are reported. The crystals diffracted X-rays to 1.65 Å resolution and the structure was solved by molecular-replacement techniques. The electron-density map unambiguously indicated the presence of three CA molecules that interact with the C-terminus of the protein. This is the first time a ligand has been observed bound to this region and is in agreement with various experiments previously reported in the literature

  3. Accelerated wound healing and anti-inflammatory effects of physically cross linked polyvinyl alcohol-chitosan hydrogel containing honey bee venom in diabetic rats.

    Science.gov (United States)

    Amin, Mohamed A; Abdel-Raheem, Ihab T

    2014-08-01

    Diabetes is one of the leading causes of impaired wound healing. The objective of this study was to develop a bee venom-loaded wound dressing with an enhanced healing and anti-inflammatory effects to be examined in diabetic rats. Different preparations of polyvinyl alcohol (PVA), chitosan (Chit) hydrogel matrix-based wound dressing containing bee venom (BV) were developed using freeze-thawing method. The mechanical properties such as gel fraction, swelling ratio, tensile strength, percentage of elongation and surface pH were determined. The pharmacological activities including wound healing and anti-inflammatory effects in addition to primary skin irritation and microbial penetration tests were evaluated. Moreover, hydroxyproline, glutathione and IL-6 levels were measured in the wound tissues of diabetic rats. The bee venom-loaded wound dressing composed of 10 % PVA, 0.6 % Chit and 4 % BV was more swellable, flexible and elastic than other formulations. Pharmacologically, the bee venom-loaded wound dressing that has the same previous composition showed accelerated healing of wounds made in diabetic rats compared to the control. Moreover, this bee venom-loaded wound dressing exhibited anti-inflammatory effect that is comparable to that of diclofenac gel, the standard anti-inflammatory drug. Simultaneously, wound tissues covered with this preparation displayed higher hydroxyproline and glutathione levels and lower IL-6 levels compared to control. Thus, the bee venom-loaded hydrogel composed of 10 % PVA, 0.6 % Chit and 4 % BV is a promising wound dressing with excellent forming and enhanced wound healing as well as anti-inflammatory activities. PMID:24293065

  4. Anti-Inflammatory Applications of Melittin, a Major Component of Bee Venom: Detailed Mechanism of Action and Adverse Effects.

    Science.gov (United States)

    Lee, Gihyun; Bae, Hyunsu

    2016-01-01

    Inflammation is a pervasive phenomenon triggered by the innate and adaptive immune systems to maintain homeostasis. The phenomenon normally leads to recovery from infection and healing, but when not properly phased, inflammation may cause immune disorders. Bee venom is a toxin that bees use for their protection from enemies. However, for centuries it has been used in the Orient as an anti-inflammatory medicine for the treatment of chronic inflammatory diseases. Bee venom and its major component, melittin, are potential means of reducing excessive immune responses and provide new alternatives for the control of inflammatory diseases. Recent experimental studies show that the biological functions of melittin could be applied for therapeutic use in vitro and in vivo. Reports verifying the therapeutic effects of melittin are accumulating in the literature, but the cellular mechanism(s) of the anti-inflammatory effects of melittin are not fully elucidated. In the present study, we review the current knowledge on the therapeutic effects of melittin and its detailed mechanisms of action against several inflammatory diseases including skin inflammation, neuroinflammation, atherosclerosis, arthritis and liver inflammation, its adverse effects as well as future prospects regarding the use of melittin. PMID:27187328

  5. Anti-Inflammatory Applications of Melittin, a Major Component of Bee Venom: Detailed Mechanism of Action and Adverse Effects

    Directory of Open Access Journals (Sweden)

    Gihyun Lee

    2016-05-01

    Full Text Available Inflammation is a pervasive phenomenon triggered by the innate and adaptive immune systems to maintain homeostasis. The phenomenon normally leads to recovery from infection and healing, but when not properly phased, inflammation may cause immune disorders. Bee venom is a toxin that bees use for their protection from enemies. However, for centuries it has been used in the Orient as an anti-inflammatory medicine for the treatment of chronic inflammatory diseases. Bee venom and its major component, melittin, are potential means of reducing excessive immune responses and provide new alternatives for the control of inflammatory diseases. Recent experimental studies show that the biological functions of melittin could be applied for therapeutic use in vitro and in vivo. Reports verifying the therapeutic effects of melittin are accumulating in the literature, but the cellular mechanism(s of the anti-inflammatory effects of melittin are not fully elucidated. In the present study, we review the current knowledge on the therapeutic effects of melittin and its detailed mechanisms of action against several inflammatory diseases including skin inflammation, neuroinflammation, atherosclerosis, arthritis and liver inflammation, its adverse effects as well as future prospects regarding the use of melittin.

  6. Effect of Bee Venom and Its Fractions on the Release of Pro-Inflammatory Cytokines in PMA-Differentiated U937 Cells Co-Stimulated with LPS

    OpenAIRE

    Jonans Tusiimire; Jennifer Wallace; Nicola Woods; Dufton, Mark J.; Parkinson, John A.; Grainne Abbott; Clements, Carol J.; Louise Young; Jin Kyu Park; Jong Woon Jeon; Ferro, Valerie A.; Watson, David G.

    2016-01-01

    The venom of Apis mellifera (honey bee) has been reported to play a role in immunotherapy, but existing evidence to support its immuno-modulatory claims is insufficient. Four fractions from whole bee venom (BV) were separated using medium pressure liquid chromatography. Their ability to induce the production of cytokines TNFα, IL-1β and IL-6 in phorbol-12-myristate-13-acetate (PMA)-treated U937 cells was assessed. The levels of the three cytokines produced by stimulation with the four fractio...

  7. Correlation of the inhibitory activity of phospholipase A2 snake venom and the antioxidant activity of Colombian plant extracts

    Directory of Open Access Journals (Sweden)

    Jaime A. Pereañez

    2010-12-01

    Full Text Available Snakebite continues to be a significant health problem in many countries of Latin America. Even though, there has been an improvement in the antivenom therapy, the local effects caused by myotoxic phospholipases A2 (PLA2 present in the venoms, still persist. In search for alternatives to antagonize the PLA2 activity of Bothrops asper's venom, 36 extracts belonging to seventeen families of vascular plants and bryophytes were screened. A significant inhibition of the enzymatic activity of PLA2 present in B. asper's whole venom was seen in eleven of these extracts. In addition, the antioxidant activity of all the extracts was evaluated. The results evidenced a significant statistical correlation between extracts with an inhibitory effect against PLA2 and those with an antioxidant activity. Moreover, the amount of phenols was quantified finding a relationship between the bioactivity and the presence of these compounds. Nine extracts were screened against a fraction of the venom rich in basic PLA2 (Fx-V B. asper, exhibiting an inhibitory effect on PLA2 activity of this fraction in a range from 30-80%. This activity was supported by the inhibition that these extracts presented on the cytotoxicity caused by Fx-V B. asper on murine skeletal muscle C2C12 myoblasts. The results obtained, could point to minimize efforts in the search of PLA2 inhibitors by focusing in samples with known antioxidant properties.Veneno de cobra continua a ser um problema importante de saúde em muitos países da América Latina. Apesar dos avanços na terapia antiveneno, os efeitos locais causados por fosfolipases A2 miotóxica (PLA2 presentes no veneno, ainda persistem. Em busca de alternativas para antagonizar a atividade da PLA2 do veneno de Bothrops asper, foram selecionados 36 extratos pertencentes a dezessete famílias de plantas vasculares e briófitas. Uma inibição significativa da atividade enzimática de PLA2 presente no veneno de B. asper foi observada em onze

  8. Clinical investigation compared with the effects of the bee-venom Acupuncture on knee joint with osteoarthritis

    Directory of Open Access Journals (Sweden)

    Wang Wu-Hao

    2001-12-01

    Full Text Available Objective: This study is designed to find out the effects of the Bee-Venom Acupuncture on knee joint with osteoarthritis. Methods: We are investigated that outpatients suffer from knee joint pain deciphered at the division of Acupuncture in Jaseng oriental medicine hospital from the 13, July 1999 to unti111, November 2000. We make an estimated of the score from both before or after its treatment about 70 cases of diagnostic patient with the osteoarthritis of knee joints by biochemical method and X-RAY analysis, we observed in the progress of symptoms. Results: These results found that sex distinction with a disease caused much more female than male at the ratio of I to 5.36 in the proportion of males to females, jobs is mainly ranked with a housewife and approximately 82.9% of cases before our hospital have ever treated at the other clinics or hospitals. On the hand, the distribution interval of a case history is mainly followed by disease in below 6 month, interval of the period-treatment is mainly gone within 3 month and frequency of treatment is examined into II to 15 times, more than 16 times and below 10 times, respectively. We are estimated with the score of functional barrier from both before or after its treatment against osteoarthritis' patients and produced in the usefulness from the totally point of fields except the aid-device after its treatment In summary, these results demonstrated that Bee Venom, Acupuncture enhanced more than 82.9% to the improvement of treatment and p<0.05 considered to be statistically significant. Conclusion: These results suggest that Bee-venom Acupuncture may be playa role in the significant usefulness and have need of actively application for the clinical trials against osteoarthritis' patients.

  9. Comparison of the Effects between Sweet Bee Venom Pharmacopuncture and Scolopendrid Pharmacopuncture on Carpal Tunnel Syndrome (Randomized, Controlled Clinical Trial

    Directory of Open Access Journals (Sweden)

    Ji-young Ku

    2010-12-01

    Full Text Available Objectives : The purpose of this study is to compare the effects of Sweet Bee Venom Pharmacopuncture and Scolopendrid Pharmacopuncture on Carpal Tunnel Syndrome. Methods : From February to September 2010, the number of patients with Carpal Tunnel Syndrome who volunteered for this clinical study was 16 and 7 out of 16 patients complained both hands. Total 23 cases of hands were randomly divided by 2 groups. We injected Sweet Bee Venom Pharmacopuncture on PC7(Daereung twice a week for 4weeks for experimental group(n=11, and Scolopendrid Pharmacopuncture with the same methods for control group(n=12. One case was dropped out due to itchiness of allergic response in the experimental group. Improvement of the symptoms was evaluated by Visual Analogue Scale, Pain Rating Scale, Tinel’s sign, Phalen’s sign and Nerve Conduction Velocity. Nerve Conduction Velocity was checked at baseline and the end of the trial and others were checked at baseline, after 2 and 4 weeks. Results : Both groups showed significant improvement in Visual Analogue Scale, Pain Rating Scale, but no significant difference between two groups. Only the control group showed significant reduction of the‘ poitive response’in the Tinel’s sign and Phalen’s sign. However, no groups improved in Nerve Conduction Velocity. Conclusions : These results showed that Sweet Bee Venom Pharmacopuncture and Scolopendrid Pharmacopuncture could decrease the symptoms of Carpal Tunnel Syndrome. Further studies will be required to examine more cases for the long period and use more various concentration and amount pharmacopuncture for the effect on Carpal Tunnel Syndrome.

  10. Purification of a basic phospholipase A2 from Indian saw-scaled viper (Echis carinatus) venom: characterization of antigenic, catalytic and pharmacological properties.

    Science.gov (United States)

    Kemparaju, K; Prasad, B N; Gowda, V T

    1994-10-01

    A major basic phospholipase A2 was purified from the Indian saw-scaled viper (Echis carinatus) venom by the combination of column chromatography and electrophoresis. The purified phospholipase A2 (EC-IV-PLA2) has a mol. wt of 14,000 by SDS-PAGE. It is a basic protein with a pI value between 7.2 and 7.6, and has a fluorescence emission maxima at 340 nm. It induces neurotoxicity and oedema in mice with an i.p. LD50 of 5 mg/kg body weight. It is devoid of direct haemolytic, myotoxic, cytotoxic and anticoagulant activities. Rabbit polyclonal antibodies prepared against EC-IV-PLA2 inhibited the in vitro enzymatic activity dose dependently, but did not neutralize the toxic effects of EC-IV-PLA2 in experimental animals. PMID:7846689

  11. Antitumour action on human glioblastoma A1235 cells through cooperation of bee venom and cisplatin.

    Science.gov (United States)

    Gajski, Goran; Čimbora-Zovko, Tamara; Rak, Sanjica; Osmak, Maja; Garaj-Vrhovac, Vera

    2016-08-01

    Cisplatin (cDDP) is one of the most widely used anticancer-drugs in both therapy and research. However, cDDP-resistance is the greatest obstacle for the successful treatment of cancer patients. In the present study, the possible joint anticancer effect of bee venom (BV), as a natural toxin, and cDDP towards human glioblastoma A1235 cells was evaluated. Treatment with BV alone in concentrations of 2.5-30 μg/ml displayed dose-dependent cytotoxicity towards A1235 cells, as evaluated with different cytotoxicity assays (MTT, Cristal violet and Trypan blue exclusion assay), with an IC50 value of 22.57 μg/ml based on the MTT results. Furthermore, BV treatment induced necrosis, which was confirmed by typical morphological features and fast staining with ethidium-bromide dye. Pre-treatment with BV induced cell sensitization to cDDP, indicating that BV could improve the killing effect of selected cells when combined with cDDP. The isobologram method used to determine the extent of synergism in combining two agents to examine their possible therapeutic effect showed that combined treatment induced an additive and/or synergistic effect towards selected cells depending on the concentration of both. Hence, a greater anticancer effect could be triggered if BV was used in the course of chemotherapy. The obtained results indicate that joint treatment with BV could be useful from the point of minimizing the cDDP concentration during chemotherapy, thus reducing and/or postponing the development of drug resistance. Our data, in accordance with previously reported results, suggests that BV could be used in the development of a new strategy for cancer treatment. PMID:25916941

  12. Snake Venom Cytotoxins, Phospholipase A2s, and Zn2+-dependent Metalloproteinases: Mechanisms of Action and Pharmacological Relevance

    OpenAIRE

    Gasanov, Sardar E.; Dagda, Ruben K.; Rael, Eppie D.

    2014-01-01

    Snake venom toxins are responsible for causing severe pathology and toxicity following envenomation including necrosis, apoptosis, neurotoxicity, myotoxicity, cardiotoxicity, profuse hemorrhage, and disruption of blood homeostasis. Clinically, snake venom toxins therefore represent a significant hazard to snakebite victims which underscores the need to produce more efficient anti-venom. Some snake venom toxins, however, have great potential as drugs for treating human diseases. In this review...

  13. The crystal structure of a phospholipase-like from Bothrops godmani venom

    International Nuclear Information System (INIS)

    Full text. Phospho lipases A2 are common components of bothropic venoms responsible for disruption of the cell membrane integrity via hydrolysis of its phospholipids, culminating with cell death. These enzymes have an Asp at position 49 (D49) which is a part of the Ca++ loop which promotes the catalytic activity on phosphatidylcholine (lecithin) from egg yolk. More recently however, a new class of PLA2-like proteins has been described which, although devoid of PLA2 activity on phosphatidylcholine, due to a mutation D49K, are still highly myonecrotic, their effect being Ca++ independent and still not completely understood. In this work we show the X-ray structure determination and refinement process of this toxin. The crystals were obtained by hanging drop, a vapour diffusion method. The data collection was made using a image plate detector R-AXIS IIC from RIGAKU (IFSC/USP), Cu Kα radiation at room temperature. Data was collected up to 2.8 A resolution and the merging of all equivalent reflections resulted in a dataset which is about 80 % complete. The crystals belong to the space group P43212 with cell constants a= b=60.56 A and c=84.72 A. The structure was solved by Molecular Replacement method using AMORE program. The structure refinement process have been made using he X-PLOR program; the final R-factor was 17.9 % and free R-factor is 25.8 % including 69 water molecules. (author)

  14. Interaction of a novel antimicrobial peptide isolated from the venom of solitary bee Colletes daviesanus with phospholipid vesicles and Escherichia coli cells

    Czech Academy of Sciences Publication Activity Database

    Čujová, Sabína; Bednárová, Lucie; Slaninová, Jiřina; Straka, J.; Čeřovský, Václav

    2014-01-01

    Roč. 20, č. 11 (2014), s. 885-895. ISSN 1075-2617 Institutional support: RVO:61388963 Keywords : antimicrobial peptides * wild-bee venom * CD spectroscopy * large unilamellar vesicles * membrane permeabilization * electron microscopy Subject RIV: CE - Biochemistry Impact factor: 1.546, year: 2014

  15. Effects of bee venom acupuncture on heart rate variability, pulse wave, and cerebral blood flow for types of Sasang Constitution

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    Lee Sang-min

    2009-03-01

    Full Text Available 1. Objectives: To evaluate effects of bee venom acupuncture on cardiovascular system and differences according to each constitution. 2. Methods: Heart rate variability, pulse wave and the velocity of cerebral blood flow were measured before bee venom acupuncture(BVA, right after and after 30 minuets, had been applied to 20 subjects. 3. Results: 1. BVA did not have effects on measurement variables of heart rate variability. 2. BVA had effects on pulse wave, showing total time, radial augmentation index up and height of percussion wave, time to percussion wave, sum of pulse pressure down. 3. BVA did not have effects on the cerebral blood flow velocity when considering not Sasang Constitution 4. Considering Sasang Constitution, BVA demonstrates different responses in time to preincisura wave, mean blood flow velocity, peak systolic velocity and end diastolic velocity. 4.Conclusion: From those results, the following conclusions are obtained. Cause BVA alters pulse wave and makes differences in the cerebral blood flow velocity according to Sasang Constitution. Various methods of BVA treatment are needed considering Sasang Constitution.

  16. Correlation between the Constitution of Sasang and Sexual Difference in the Hypersensitive Reaction of Sweet Bee Venom

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    Lee Kwangho

    2012-09-01

    Full Text Available Objectives: The aim of this study is to investigate the correlation between the constitution of Sasang and the bee venom hypersensitive reaction, as well as the hypersensitive reaction occurrence ratio between males and females, for patients treated with sweet bee venom (SBV and who had undergone an examination of the constitution of the Sasang. Methods: All 81 patients enrolled in the study were treated with SBV and underwent an examination of the constitution of Sasang from January 2010 to July 2012. We divided them into two groups for the hypersensitive reaction and no response and compared the distributions of the Sasang-constitution types for the two groups as well as the hypersensitive reaction occurrence ratio between males and females. Results: No significant differences were found between the hypersensitive-reaction group and the no-response group (p = 0.390, but the hypersensitive-reaction occurrence ratio was statistically higher in females than in males (p = 0.001. Conclusions: Hypersensitive reactions do not seem to be related to the Sasang-constitution types, but the possibility of hypersensitive reactions among females seems to be higher than it is among males.

  17. Secreted Phospholipases A2 of Snake Venoms: Effects on the Peripheral Neuromuscular System with Comments on the Role of Phospholipases A2 in Disorders of the CNS and Their Uses in Industry

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    John B. Harris

    2013-12-01

    Full Text Available Neuro- and myotoxicological signs and symptoms are significant clinical features of envenoming snakebites in many parts of the world. The toxins primarily responsible for the neuro and myotoxicity fall into one of two categories—those that bind to and block the post-synaptic acetylcholine receptors (AChR at the neuromuscular junction and neurotoxic phospholipases A2 (PLAs that bind to and hydrolyse membrane phospholipids of the motor nerve terminal (and, in most cases, the plasma membrane of skeletal muscle to cause degeneration of the nerve terminal and skeletal muscle. This review provides an introduction to the biochemical properties of secreted sPLA2s in the venoms of many dangerous snakes and a detailed discussion of their role in the initiation of the neurologically important consequences of snakebite. The rationale behind the experimental studies on the pharmacology and toxicology of the venoms and isolated PLAs in the venoms is discussed, with particular reference to the way these studies allow one to understand the biological basis of the clinical syndrome. The review also introduces the involvement of PLAs in inflammatory and degenerative disorders of the central nervous system (CNS and their commercial use in the food industry. It concludes with an introduction to the problems associated with the use of antivenoms in the treatment of neuro-myotoxic snakebite and the search for alternative treatments.

  18. Hymenoptera venom review focusing on Apis mellifera

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    P. R. de Lima

    2003-01-01

    Full Text Available Hymenoptera venoms are complex mixtures containing simple organic molecules, proteins, peptides, and other bioactive elements. Several of these components have been isolated and characterized, and their primary structures determined by biochemical techniques. These compounds are responsible for many toxic or allergic reactions in different organisms, such as local pain, inflammation, itching, irritation, and moderate or severe allergic reactions. The most extensively characterized Hymenoptera venoms are bee venoms, mainly from the Apis genus and also from social wasps and ant species. However, there is little information about other Hymenoptera groups. The Apis venom presents high molecular weight molecules - enzymes with a molecular weight higher than 10.0 kDa - and peptides. The best studied enzymes are phospholipase A2, responsible for cleaving the membrane phospholipids, hyaluronidase, which degrades the matrix component hyaluronic acid into non-viscous segments and acid phosphatase acting on organic phosphates. The main peptide compounds of bee venom are lytic peptide melittin, apamin (neurotoxic, and mastocyte degranulating peptide (MCD.

  19. Inhibition of the Myotoxicity Induced by Bothrops jararacussu Venom and Isolated Phospholipases A2 by Specific Camelid Single-Domain Antibody Fragments

    Science.gov (United States)

    Prado, Nidiane D. R.; Pereira, Soraya S.; da Silva, Michele P.; Morais, Michelle S. S.; Kayano, Anderson M.; Moreira-Dill, Leandro S.; Luiz, Marcos B.; Zanchi, Fernando B.; Fuly, André L.; E. F. Huacca, Maribel; Fernandes, Cleberson F.; Calderon, Leonardo A.; Zuliani, Juliana P.; Soares, Andreimar M.; Stabeli, Rodrigo G.; F. C. Fernandes, Carla

    2016-01-01

    Antivenoms, produced using animal hyperimmune plasma, remains the standard therapy for snakebites. Although effective against systemic damages, conventional antivenoms have limited efficacy against local tissue damage. Additionally, the hypersensitivity reactions, often elicited by antivenoms, the high costs for animal maintenance, the difficulty of producing homogeneous lots, and the instability of biological products instigate the search for innovative products for antivenom therapy. In this study, camelid antibody fragments (VHH) with specificity to Bothropstoxin I and II (BthTX-I and BthTX-II), two myotoxic phospholipases from Bothrops jararacussu venom, were selected from an immune VHH phage display library. After biopanning, 28 and 6 clones recognized BthTX-I and BthTX-II by ELISA, respectively. Complementarity determining regions (CDRs) and immunoglobulin frameworks (FRs) of 13 VHH-deduced amino acid sequences were identified, as well as the camelid hallmark amino acid substitutions in FR2. Three VHH clones (KF498607, KF498608, and KC329718) were capable of recognizing BthTX-I by Western blot and showed affinity constants in the nanomolar range against both toxins. VHHs inhibited the BthTX-II phospholipase A2 activity, and when tested for cross-reactivity, presented specificity to the Bothrops genus in ELISA. Furthermore, two clones (KC329718 and KF498607) neutralized the myotoxic effects induced by B. jararacussu venom, BthTX-I, BthTX-II, and by a myotoxin from Bothrops brazili venom (MTX-I) in mice. Molecular docking revealed that VHH CDRs are expected to bind the C-terminal of both toxins, essential for myotoxic activity, and to epitopes in the BthTX-II enzymatic cleft. Identified VHHs could be a biotechnological tool to improve the treatment for snake envenomation, an important and neglected world public health problem. PMID:27028872

  20. Crystallization and preliminary X-ray diffraction studies of BmooPLA2-I, a platelet-aggregation inhibitor and hypotensive phospholipase A2 from Bothrops moojeni venom

    International Nuclear Information System (INIS)

    BmooPLA2-I, an acidic, catalytic and nontoxic phospholipase A2 from B. moojeni venom that is able to inhibit platelet aggregation and induce a hypotensive effect, has been crystallized. An X-ray diffraction data set was collected to 1.6 Å resolution and a molecular-replacement solution was obtained. Phospholipases A2 (PLA2s) are enzymes that cause the liberation of fatty acids and lysophospholipids by the hydrolysis of membrane phospholipids. In addition to their catalytic action, a wide variety of pharmacological activities have been described for snake-venom PLA2s. BmooPLA2-I is an acidic, nontoxic and catalytic PLA2 isolated from Bothrops moojeni snake venom which exhibits an inhibitory effect on platelet aggregation, an immediate decrease in blood pressure, inducing oedema at a low concentration, and an effective bactericidal effect. BmooPLA2-I has been crystallized and X-ray diffraction data have been collected to 1.6 Å resolution using a synchrotron-radiation source. The crystals belonged to space group C2221, with unit-cell parameters a = 39.7, b = 53.2, c = 89.2 Å. The molecular-replacement solution of BmooPLA2-I indicated a monomeric conformation, which is in agreement with nondenaturing electrophoresis and dynamic light-scattering experiments. A comparative study of this enzyme with the acidic PLA2 from B. jararacussu (BthA-I) and other toxic and nontoxic PLA2s may provide important insights into the functional aspects of this class of proteins

  1. Inhibition of the Myotoxicity Induced by Bothrops jararacussu Venom and Isolated Phospholipases A2 by Specific Camelid Single-Domain Antibody Fragments.

    Science.gov (United States)

    Prado, Nidiane D R; Pereira, Soraya S; da Silva, Michele P; Morais, Michelle S S; Kayano, Anderson M; Moreira-Dill, Leandro S; Luiz, Marcos B; Zanchi, Fernando B; Fuly, André L; E F Huacca, Maribel; Fernandes, Cleberson F; Calderon, Leonardo A; Zuliani, Juliana P; Pereira da Silva, Luiz H; Soares, Andreimar M; Stabeli, Rodrigo G; F C Fernandes, Carla

    2016-01-01

    Antivenoms, produced using animal hyperimmune plasma, remains the standard therapy for snakebites. Although effective against systemic damages, conventional antivenoms have limited efficacy against local tissue damage. Additionally, the hypersensitivity reactions, often elicited by antivenoms, the high costs for animal maintenance, the difficulty of producing homogeneous lots, and the instability of biological products instigate the search for innovative products for antivenom therapy. In this study, camelid antibody fragments (VHH) with specificity to Bothropstoxin I and II (BthTX-I and BthTX-II), two myotoxic phospholipases from Bothrops jararacussu venom, were selected from an immune VHH phage display library. After biopanning, 28 and 6 clones recognized BthTX-I and BthTX-II by ELISA, respectively. Complementarity determining regions (CDRs) and immunoglobulin frameworks (FRs) of 13 VHH-deduced amino acid sequences were identified, as well as the camelid hallmark amino acid substitutions in FR2. Three VHH clones (KF498607, KF498608, and KC329718) were capable of recognizing BthTX-I by Western blot and showed affinity constants in the nanomolar range against both toxins. VHHs inhibited the BthTX-II phospholipase A2 activity, and when tested for cross-reactivity, presented specificity to the Bothrops genus in ELISA. Furthermore, two clones (KC329718 and KF498607) neutralized the myotoxic effects induced by B. jararacussu venom, BthTX-I, BthTX-II, and by a myotoxin from Bothrops brazili venom (MTX-I) in mice. Molecular docking revealed that VHH CDRs are expected to bind the C-terminal of both toxins, essential for myotoxic activity, and to epitopes in the BthTX-II enzymatic cleft. Identified VHHs could be a biotechnological tool to improve the treatment for snake envenomation, an important and neglected world public health problem. PMID:27028872

  2. Inhibition of the Myotoxicity Induced by Bothrops jararacussu Venom and Isolated Phospholipases A2 by Specific Camelid Single-Domain Antibody Fragments.

    Directory of Open Access Journals (Sweden)

    Nidiane D R Prado

    Full Text Available Antivenoms, produced using animal hyperimmune plasma, remains the standard therapy for snakebites. Although effective against systemic damages, conventional antivenoms have limited efficacy against local tissue damage. Additionally, the hypersensitivity reactions, often elicited by antivenoms, the high costs for animal maintenance, the difficulty of producing homogeneous lots, and the instability of biological products instigate the search for innovative products for antivenom therapy. In this study, camelid antibody fragments (VHH with specificity to Bothropstoxin I and II (BthTX-I and BthTX-II, two myotoxic phospholipases from Bothrops jararacussu venom, were selected from an immune VHH phage display library. After biopanning, 28 and 6 clones recognized BthTX-I and BthTX-II by ELISA, respectively. Complementarity determining regions (CDRs and immunoglobulin frameworks (FRs of 13 VHH-deduced amino acid sequences were identified, as well as the camelid hallmark amino acid substitutions in FR2. Three VHH clones (KF498607, KF498608, and KC329718 were capable of recognizing BthTX-I by Western blot and showed affinity constants in the nanomolar range against both toxins. VHHs inhibited the BthTX-II phospholipase A2 activity, and when tested for cross-reactivity, presented specificity to the Bothrops genus in ELISA. Furthermore, two clones (KC329718 and KF498607 neutralized the myotoxic effects induced by B. jararacussu venom, BthTX-I, BthTX-II, and by a myotoxin from Bothrops brazili venom (MTX-I in mice. Molecular docking revealed that VHH CDRs are expected to bind the C-terminal of both toxins, essential for myotoxic activity, and to epitopes in the BthTX-II enzymatic cleft. Identified VHHs could be a biotechnological tool to improve the treatment for snake envenomation, an important and neglected world public health problem.

  3. cDNA and deduced primary structure of basic phospholipase A2 with neurotoxic activity from the venom secretion of the Crotalus durissus collilineatus rattlesnake

    Directory of Open Access Journals (Sweden)

    F.H.R. Fagundes

    2010-03-01

    Full Text Available To illustrate the construction of precursor complementary DNAs, we isolated mRNAs from whole venom samples. After reverse transcription polymerase chain reaction (RT-PCR, we amplified the cDNA coding for a neurotoxic protein, phospholipase A2 D49 (PLA2 D49, from the venom of Crotalus durissus collilineatus (Cdc PLA2. The cDNA encoding Cdc PLA2 from whole venom was sequenced. The deduced amino acid sequence of this cDNA has high overall sequence identity with the group II PLA2 protein family. Cdc PLA2 has 14 cysteine residues capable of forming seven disulfide bonds that characterize this group of PLA2 enzymes. Cdc PLA2 was isolated using conventional Sephadex G75 column chromatography and reverse-phase high performance liquid chromatography (RP-HPLC. The molecular mass was estimated using matrix-assisted laser desorption ionization-time-of-flight (MALDI-TOF mass spectrometry. We tested the neuromuscular blocking activities on chick biventer cervicis neuromuscular tissue. Phylogenetic analysis of Cdc PLA2 showed the existence of two lines of N6-PLA2, denominated F24 and S24. Apparently, the sequences of the New World’s N6-F24-PLA2 are similar to those of the agkistrodotoxin from the Asian genus Gloydius. The sequences of N6-S24-PLA2 are similar to the sequence of trimucrotoxin from the genus Protobothrops, found in the Old World.

  4. Effects of Sweet Bee Venom on cardiovascular system in the conscious telemetered Beagle Dogs

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    Lim Chung-San

    2010-09-01

    Full Text Available Objectives:This study was performed to analyse the effects of Sweet Bee Venom(Sweet BV on cardiovascular system in the conscious telemetered Beagle Dogs. Methods:All experiments were conducted at Biotoxtech Company, a non-clinical studies authorized institution, under the regulations of Good Laboratory Practice (GLP. Male Beagle dogs of 13-19 months old were chosen for the pilot study and surgical implantation was performed for conscious telemetered Beagle dogs. And after confirming condition of Beagle dogs was stable, Sweet BV was administered 4 times(first: 0.0 ㎎/㎏, 2nd: 0.01 ㎎/㎏, 3rd: 0.1 ㎎/㎏, and forth: 0.5 ㎎/㎏, one time/week in thigh muscle of Beagle dogs. And blood pressure, heart rate, electrocardiography and clinical responses were measured. Equal amount of normal saline to the Sweet BV experiment groups was administered to the control group. 1. In the analysis of body weight and taking amount, Beagle dogs did not show significant changes. 2. In the clinical observation, responses of pain and edema were showed depend on dosage of Sweet BV. 3. In the analysis of blood pressure, treatment with Sweet BV did not show significant changes in the dosage of 0.01 ㎎/㎏, but in the dosage of 0.1 ㎎/㎏ and 0.5 ㎎/㎏, treatment with Sweet BV increased blood pressure significantly. 4. In the analysis of heart rate, treatment of Sweet BV did not show significant changes in all dosage and period. 5. In the analysis of electrocardiography, treatment of Sweet BV was not showed significant changes in all dosage and period. Conclusion:Above findings suggest that Sweet BV is relatively safe treatment in the cardiovascular system. But in the using of over dosage, Sweet BV may the cause of increasing blood pressure. Further studies on the subject should be conducted to yield more concrete evidences.

  5. A SENSITIVE AND SPECIFIC IMMUNOASSAY FOR THE MEASUREMENT OF THE ANTIBODIES PRESENT IN HORSE ANTIVENOMS ENDOWED WITH THE CAPACITY TO BLOCK THE PHOSPHOLIPASE A2-DEPENDENT HEMOLYSIS INDUCED BY SNAKE VENOMS

    Directory of Open Access Journals (Sweden)

    A. C. M. ROCHA CAMPOS

    1996-01-01

    Full Text Available Phospholipase A2 (PLA2, a component of most snake venom toxins, cleaves 3-sn-phosphoglycerides releasing lysophosphatidyl-choline. The indirect quantitative assay method for PLA2 was standardized for specific antivenom titration in a fast and sensitive assay by the similarity with the hemolysis induced by PLA2 and by complement system in sheep erythrocytes. The curves obtained by plotting the degree of hemolysis against the doses of snake venom are concave to the abscissa axis following an equation similar to that previously described for the hemolysis induced by the C system. We observed that venoms of some Bothrops, Crotalus and Micrurus species contained around 1 x 10 to 10 Z/mg of venom, while the venom of Naja contained over one million Z/mg. Antibodies against PLA2 were titrated by incubating amounts of venom predetermined to give 1 to 5 Z with various dilutions of the antivenoms, and the remaining active PLA2 was determined in the hemolytic assay. We observed the following: a the antivenoms contained specific antibodies against the PLA2 present in the corresponding venoms; b cross-reactivity was not detected among PLA2 epitopes from venoms and nonspecific antivenoms; and c the assay quantitatively performed determined the specific antibodies directed to epitopes on the molecule of PLA2. The method described in this paper is highly specific, sensitive and reproducible, besides being fast and inexpensive.

  6. Bee venom acupuncture for the treatment of chronic low back pain: study protocol for a randomized, double-blinded, sham-controlled trial

    Directory of Open Access Journals (Sweden)

    Seo Byung-Kwan

    2013-01-01

    Full Text Available Abstract Background Chronic non-specific low back pain is the most common medical problem for which patients seek complementary and alternative medical treatment, including bee venom acupuncture. However, the effectiveness and safety of such treatments have not been fully established by randomized clinical trials. The aim of this study is to determine whether bee venom acupuncture is effective for improving pain intensity, functional status and quality of life of patients with chronic non-specific low back pain. Methods/design This study is a randomized, double-blinded, sham-controlled clinical trial with two parallel arms. Fifty-four patients between 18 and 65 years of age with non-radicular chronic low back pain experiencing low back pain lasting for at least the previous three months and ≥4 points on a 10-cm visual analog scale for bothersomeness at the time of screening will be included in the study. Participants will be randomly allocated into the real or sham bee venom acupuncture groups and treated by the same protocol to minimize non-specific and placebo effects. Patients, assessors, acupuncturists and researchers who prepare the real or sham bee venom acupuncture experiments will be blinded to group allocation. All procedures, including the bee venom acupuncture increment protocol administered into predefined acupoints, are designed by a process of consensus with experts and previous researchers according to the Standards for Reporting Interventions in Clinical Trials of Acupuncture. Bothersomeness measured using a visual analogue scale will be the primary outcome. Back pain-related dysfunction, pain, quality of life, depressive symptoms and adverse experiences will be measured using the visual analogue scale for pain intensity, the Oswestry Disability Index, the EuroQol 5-Dimension, and the Beck’s Depression Inventory. These measures will be recorded at baseline and 1, 2, 3, 4, 8 and 12 weeks. Discussion The results from this study

  7. Bee Stings & Their Consequences.

    Science.gov (United States)

    Rupp, Robert M.

    1991-01-01

    Relevant information concerning bee stings is provided. Possible reactions to a bee sting and their symptoms, components of bee venom, diagnosis of hypersensitivity, and bee sting prevention and treatment are topics of discussion. The possibility of bee stings occurring during field trips and the required precautions are discussed. (KR)

  8. Effects of Sweet Bee Venom on the Central Nervous System in Rats -using the Functional Observational Battery-

    Directory of Open Access Journals (Sweden)

    Joong Chul An

    2011-09-01

    Full Text Available Objectives: This study was performed to analyse the effects of Sweet Bee Venom(Sweet BV-pure melittin, the major component of honey bee venom on the central nervous system in rats. Methods: All experiments were conducted at Biotoxtech Company, a non-clinical studies authorized institution, under the regulations of Good Laboratory Practice (GLP. Male rats of 5 weeks old were chosen for this study and after confirming condition of rats was stable, Sweet BV was administered in thigh muscle of rats. And checked the effects of Sweet BV on the central nervous system using the functional observational battery (FOB, which is a neuro-toxicity screening assay composed of 30 descriptive, scalar, binary, and continuous endpoints. And home cage observations, home cage removal and handling, open field activity, sensorimotor reflex test/physiological measurements were conducted. Results: 1. In the home cage observation, there was not observed any abnormal signs in rats. 2. In the observation of open field activity, the reduction of number of unit areas crossed and rearing count was observed caused by Sweet BV treatment. 3. In the observation of handling reactivity, there was not observed any abnormal signs in rats. 4. In the observation of sensorimotor reflex tests/physiological measurements, there was not observed any neurotoxic signs in rats. 5. In the measurement of rectal temperature, treatment of Sweet BV did not showed great influences in the body temperature of rats. Conclusions: Above findings suggest that Sweet BV is relatively safe treatment in the central nervous system. But in the using of over dose, Sweet BV may the cause of local pain and disturbance of movement. Further studies on the subject should be conducted to yield more concrete evidences.

  9. Purification and characterization of a platelet aggregation inhibitor acidic phospholipase A2 from Indian saw-scaled viper (Echis carinatus) venom.

    Science.gov (United States)

    Kemparaju, K; Krishnakanth, T P; Veerabasappa Gowda, T

    1999-12-01

    An acidic phospholipase A2 (EC-I-PLA2) has been purified from the Indian saw-scaled viper (Echis carinatus) venom through a combination of column chromatography and electrophoresis. EC-I-PLA2 has a molecular weight of 16000 by SDS-PAGE. It was focussed between pH 4.2 and 4.8 by isoelectro focussing. EC-I-PLA2 was non-lethal to mice and devoid of neurotoxicity, myotoxicity, anticoagulant activity and cytotoxicity. It induced mild oedema in the foot pads of mice. The purified PLA2 inhibited ADP, collagen and epinephrine induced human platelet aggregation and the inhibition was both dose and time dependent. PMID:10519645

  10. A Case of The Reduction of Symptoms, But No Change on The CT Scanning in HNP by Oriental Medical Treatment Added Mori cortex-Bee Venom Acupuncture

    Directory of Open Access Journals (Sweden)

    Lee, Byung-Hoon

    2001-06-01

    Full Text Available By process of treatment for a case which diagnosed as HNP of left posterolateral aspect of L4/5 disc and treated from the 10th, May 2001 to the 23rd, Jun 2001, the results are as follows. Method & Results : This patient was medicated Hwallaktang-gami, taken acupuncture, phototherapy, TENS, electric acupuncture, exercises, Mori Cortex-bee venom acupuncture. As a result, the patient's clinical symptom were improved but a computed tomagraphy confirmed L4/5 and L5/S1 HNP was not changed as seen on repeated CT scanning. Conclusion : These results suggest that among conservative therapies the oriental medical treatments including Mori Cortex-bee venom acupuncture improve clinical symptom effectively. But in this case, the structure of herniated disc was not changed.

  11. Evaluation of different glycoforms of honeybee venom major allergen phospholipase A2 (Api m 1) produced in insect cells

    DEFF Research Database (Denmark)

    Blank, Simon; Seismann, Henning; Plum, Melanie;

    2011-01-01

    were analyzed for their glycosylation and proved to show advantageous properties regarding cross-reactivity in sIgE-based assays. Additionally, in contrast to the enzymatically active native protein the inactivated allergen did not induce IgE-independent effector cell activation. Thus, insect cell......-derived recombinant Api m 1 with defined CCD phenotypes might provide further insights into hymenoptera venom IgE reactivities and contribute to an improved diagnosis of hymenoptera venom allergy....

  12. Isolation of Melittin from Iranian Honey Bee Venom and Investigation of Its Effect on Proliferation of Cervical Cancer- HeLa Cell Line

    OpenAIRE

    K Pooshang Bagheri; A Mahmoodzadeh; H Zarinnahad; M. Mahdavi; Shahbazzadeh, D.; A Moradi

    2013-01-01

    Introduction: Cervical cancer is the second prevalent cancer in developing countries and the sixth prevalent cancer in USA. Since conventional treatment methods are associated with detrimental side effects, searching for new drugs using natural ingredients is very important. Previous studies have shown that melittin (main component of honey bee venom) has anticancer properties along with the effect on cell membrane and activation of apoptosis. In this study, inhibitory effects of melittin on ...

  13. Inhibitory effects of microinjection of morphine into thalamic nucleus submedius on ipsilateral paw bee venom-induced inflammatory pain in the rat

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    Objective To examine whether microinjection of morphine into the rat thalamic nucleus submedius (Sm) could depress the bee venom (BV)-induced nociceptive behaviours. Methods In inflammatory pain model induced by BV subcutaneous injection into rat unilateral hind paw,the inhibitory effects of morphine microinjection into thalamic nucleus submedius (Sm) on the spontaneous nociceptive behavior,heat hyperalgesia and tactile allodynia,and the influence of naloxone on the morphine effects were observed in the rat...

  14. Nationwide Survey of Patient Knowledge and Attitudes towards Human Experimentation Using Stem Cells or Bee Venom Acupuncture for Parkinson’s Disease

    OpenAIRE

    ,; Chung, Sun Ju; Koh, Seong Beom; Ju, Young-Su; Kim, Jae Woo

    2014-01-01

    Objective Stem cell treatment is a well-recognized experimental treatment among patients with Parkinson’s disease (PD), for which there are high expectations of a positive impact. Acupuncture with bee venom is one of the most popular complementary and alternative treatments for PD. Patient knowledge and attitudes towards these experimental treatments are unknown. Methods Using a 12-item questionnaire, a nationwide survey was conducted of 963 PD patients and 267 caregivers in 44 Korean Movemen...

  15. Substituted thiobenzoic acid S-benzyl esters as potential inhibitors of a snake venom phospholipase A2: Synthesis, spectroscopic and computational studies

    Science.gov (United States)

    Henao Castañeda, I. C.; Pereañez, J. A.; Jios, J. L.

    2012-11-01

    4-Chlorothiobenzoic acid S-benzyl ester (I), 3-nitrothiobenzoic acid S-benzyl ester (II), 4-nitrothiobenzoic acid S-benzyl ester (III) and 4-methylthiobenzoic acid S-benzyl ester (IV) were prepared and characterized by 1H and 13C NMR, Mass spectrometry and IR spectroscopy. Quantum chemical calculations were performed with Gaussian 09 to calculate the geometric parameters and vibrational spectra. Phospholipase A2 (PLA2) was purified from Crotalus durissus cumanensis venom by molecular exclusion chromatography, followed by reverse phase-high performance liquid chromatography. Two studies of the inhibition of phospholipase A2 activity were performed using phosphatidilcholine and 4-nitro-3-octanoyloxybenzoic acid as substrates, in both cases compound II showed the best inhibitory ability, with 74.89% and 69.91% of inhibition, respectively. Average percentage of inhibition was 52.49%. Molecular docking was carried out with Autodock Vina using as ligands the minimized structures of compounds (I-IV) and as protein PLA2 (PDB code 2QOG). The results suggest that compounds I-IV could interact with His48 at the active site of PLA2. In addition, all compounds showed Van der Waals interactions with residues from hydrophobic channel of the enzyme. This interaction would impede normal catalysis cycle of the PLA2.

  16. MVL-PLA2, a snake venom phospholipase A2, inhibits angiogenesis through an increase in microtubule dynamics and disorganization of focal adhesions.

    Science.gov (United States)

    Bazaa, Amine; Pasquier, Eddy; Defilles, Céline; Limam, Ines; Kessentini-Zouari, Raoudha; Kallech-Ziri, Olfa; El Battari, Assou; Braguer, Diane; El Ayeb, Mohamed; Marrakchi, Naziha; Luis, José

    2010-01-01

    Integrins are essential protagonists of the complex multi-step process of angiogenesis that has now become a major target for the development of anticancer therapies. We recently reported and characterized that MVL-PLA2, a novel phospholipase A2 from Macrovipera lebetina venom, exhibited anti-integrin activity. In this study, we show that MVL-PLA2 also displays potent anti-angiogenic properties. This phospholipase A2 inhibited adhesion and migration of human microvascular-endothelial cells (HMEC-1) in a dose-dependent manner without being cytotoxic. Using Matrigel and chick chorioallantoic membrane assays, we demonstrated that MVL-PLA2, as well as its catalytically inactivated form, significantly inhibited angiogenesis both in vitro and in vivo. We have also found that the actin cytoskeleton and the distribution of alphav beta3 integrin, a critical regulator of angiogenesis and a major component of focal adhesions, were disturbed after MVL-PLA2 treatment. In order to further investigate the mechanism of action of this protein on endothelial cells, we analyzed the dynamic instability behavior of microtubules in living endothelial cells. Interestingly, we showed that MVL-PLA2 significantly increased microtubule dynamicity in HMEC-1 cells by 40%. We propose that the enhancement of microtubule dynamics may explain the alterations in the formation of focal adhesions, leading to inhibition of cell adhesion and migration. PMID:20405031

  17. Structural and biophysical studies with the MjTX-I, a Lys49-phospholipase A{sub 2} homologue from Bothrops moojeni venom

    Energy Technology Data Exchange (ETDEWEB)

    Salvador, G.H.M.; Fernandes, C.A.H.; Fernandez, R.M.; Fontes, M.R.M. [UNESP, Universidade Estadual Paulista, Botucatu, SP (Brazil); Marchi-Salvador, D.P. [Universidade Federal da Paraiba (UFPB), Joao Pessoa, PB (Brazil); Soares, A.M. [Universidade de Sao Paulo (USP-RP), Ribeirao Preto, SP (Brazil); Oliveira, C.L.P [Universidade de Sao Paulo (USP), SP (Brazil)

    2012-07-01

    Full text: Phospholipases A{sub 2} (PLA{sub 2}) are small proteins found in a great diversity of organisms and belong to a superfamily of proteins involved in many important pharmacological processes, such as neurotoxicity, myotoxicity, platelet aggregation, and anticoagulant activity. Ophidic accidents caused by snakes from Bothrops genus are not efficiently neutralized by conventional serum therapy, and then detailed studies with this class of proteins may be very important to supplement this conventional therapy. Miotoxin-I (MjTX-I) is a basic Lys49-PLA{sub 2}, isolated from Bothrops moojeni snake venom, which induces a drastic local myonecrosis. Crystal structure of MjTX-I shows four molecules in the asymmetric unit, an unusually oligomeric conformation for snake venom Lys49-PLA{sub 2}s. However, bioinformatics techniques indicate a dimer as the biological oligomeric conformation. To get additional information of its biological conformation, we also performed Dynamic Light Scattering, Size Exclusion Chromatography and Small Angle X-ray Scattering experiments. These techniques showed a monomer as the most probable biological conformation in water; however small changes in pH and ionic strength result in different oligomeric assemblies. These novel information for Lys49-PLA{sub 2}s may result in important conclusions for this intriguing class of toxins. (author)

  18. Binding and inhibition studies on lipocortins using phosphatidylcholine vesicles and phospholipase A2 from snake venom, pancreas, and a macrophage-like cell line.

    Science.gov (United States)

    Davidson, F F; Lister, M D; Dennis, E A

    1990-04-01

    Studies are reported on the inhibition of phospholipase A2 (PLA2) from porcine pancreas, cobra (Naja naja) venom, and the P388D1 macrophage-like cell line by human recombinant lipocortin I and bovine lung calpactin I. Membrane vesicles prepared from 1-stearoyl,2-arachidonoyl phosphatidylcholine (PC) and other PCs were utilized as substrate. Binding studies using sucrose flotation gradients showed that both lipocortin I and calpactin I bind to these vesicles although less tightly than to vesicles prepared from anionic phospholipids or fatty acids. Binding to PC was somewhat enhanced by Ca2+. Inhibition of cobra venom PLA2 was not observed when PC vesicles were used as substrate but was when dipalmitoyl phosphatidylethanolamine was used. Both the pancreatic and macrophage enzymes were inhibited when acting on PC. Interestingly, the inhibition of the macrophage enzyme toward PC depended on the fatty acid attached to the sn-2 position of PC with arachidonate greater than oleate greater than palmitate. Inhibition was also highest at low [PC]; these inhibition results can be explained by the "substrate depletion model" (Davidson, F. F., Dennis, E. A., Powell, M., and Glenney, J. (1987) J. Biol. Chem. 262, 1698-1705). Experimental and theoretical considerations suggest that the in vitro inhibition by lipocortins of this macrophage PLA2 from a cell that makes lipocortin and is active in prostaglandin production is due to effects on substrate availability rather than direct inhibition. PMID:2138608

  19. PhTX-II a Basic Myotoxic Phospholipase A2 from Porthidium hyoprora Snake Venom, Pharmacological Characterization and Amino Acid Sequence by Mass Spectrometry

    Directory of Open Access Journals (Sweden)

    Salomón Huancahuire-Vega

    2014-10-01

    Full Text Available A monomeric basic PLA2 (PhTX-II of 14149.08 Da molecular weight was purified to homogeneity from Porthidium hyoprora venom. Amino acid sequence by in tandem mass spectrometry revealed that PhTX-II belongs to Asp49 PLA2 enzyme class and displays conserved domains as the catalytic network, Ca2+-binding loop and the hydrophobic channel of access to the catalytic site, reflected in the high catalytic activity displayed by the enzyme. Moreover, PhTX-II PLA2 showed an allosteric behavior and its enzymatic activity was dependent on Ca2+. Examination of PhTX-II PLA2 by CD spectroscopy indicated a high content of alpha-helical structures, similar to the known structure of secreted phospholipase IIA group suggesting a similar folding. PhTX-II PLA2 causes neuromuscular blockade in avian neuromuscular preparations with a significant direct action on skeletal muscle function, as well as, induced local edema and myotoxicity, in mice. The treatment of PhTX-II by BPB resulted in complete loss of their catalytic activity that was accompanied by loss of their edematogenic effect. On the other hand, enzymatic activity of PhTX-II contributes to this neuromuscular blockade and local myotoxicity is dependent not only on enzymatic activity. These results show that PhTX-II is a myotoxic Asp49 PLA2 that contributes with toxic actions caused by P. hyoprora venom.

  20. Structural and biophysical studies with the MjTX-I, a Lys49-phospholipase A2 homologue from Bothrops moojeni venom

    International Nuclear Information System (INIS)

    Full text: Phospholipases A2 (PLA2) are small proteins found in a great diversity of organisms and belong to a superfamily of proteins involved in many important pharmacological processes, such as neurotoxicity, myotoxicity, platelet aggregation, and anticoagulant activity. Ophidic accidents caused by snakes from Bothrops genus are not efficiently neutralized by conventional serum therapy, and then detailed studies with this class of proteins may be very important to supplement this conventional therapy. Miotoxin-I (MjTX-I) is a basic Lys49-PLA2, isolated from Bothrops moojeni snake venom, which induces a drastic local myonecrosis. Crystal structure of MjTX-I shows four molecules in the asymmetric unit, an unusually oligomeric conformation for snake venom Lys49-PLA2s. However, bioinformatics techniques indicate a dimer as the biological oligomeric conformation. To get additional information of its biological conformation, we also performed Dynamic Light Scattering, Size Exclusion Chromatography and Small Angle X-ray Scattering experiments. These techniques showed a monomer as the most probable biological conformation in water; however small changes in pH and ionic strength result in different oligomeric assemblies. These novel information for Lys49-PLA2s may result in important conclusions for this intriguing class of toxins. (author)

  1. Cytotoxic activities of [Ser⁴⁹]phospholipase A₂ from the venom of the saw-scaled vipers Echis ocellatus, Echis pyramidum leakeyi, Echis carinatus sochureki, and Echis coloratus.

    Science.gov (United States)

    Conlon, J Michael; Attoub, Samir; Arafat, Hama; Mechkarska, Milena; Casewell, Nicholas R; Harrison, Robert A; Calvete, Juan J

    2013-09-01

    Fractionation by reversed-phase HPLC of venom from four species of saw-scaled viper: Echis ocellatus, Echis pyramidum leakeyi, Echis carinatus sochureki, and Echis coloratus led to identification in each sample of an abundant protein with cytotoxic activity against human non-small cell lung adenocarcinoma A549 cells. The active component in each case was identified by MALDI-TOF mass fingerprinting of tryptic digests as [Ser⁴⁹]phospholipase A₂ ([Ser⁴⁹]PLA₂). An isoform of [Ser⁴⁹]PLA₂ containing the single Ala¹⁸→ Val substitution and a partially characterized [Asp⁴⁹]PLA₂ were also present in the E. coloratus venom. LC₅₀ values against A549 cells for the purified [Ser⁴⁹]PLA₂ proteins from the four species are in the range 2.9-8.5 μM. This range is not significantly different from the range of LC₅₀ values against human umbilical vein endothelial HUVEC cells (2.5-12.2 μM) indicating that the [Ser⁴⁹]PLA₂ proteins show no differential anti-tumor activity. The LC₅₀ value for [Ser⁴⁹]PLA₂ from E. ocellatus against human erythrocytes is >100 μM and the MIC values against Escherichia coli and Staphylococcus aureus are >100 μM. It is suggested that the [Ser⁴⁹]PLA₂ proteins play a major role in producing local tissue necrosis and hemorrhage at the site of envenomation. PMID:23747272

  2. 蜂毒的主要成分及药理作用的研究进展%Advances in main compositions and pharmacological effects of bee venom

    Institute of Scientific and Technical Information of China (English)

    张冰清; 刘晓波

    2016-01-01

    Bee venom is a kind of active compounds secreted by the gland,which have many active ingredients like anti-inflammatory,anti -tumor,analgesic,anti -hypertensive and so on.In recent years,many scientists had been made im-portant progress in research of the active ingredient analysis,genetic structure,pharmacological action mechanism and mo-lecular biology of bee venom.The purpose of this article was to summarize main active ingredients of bee venom and the main pharmacological actions and provide theoretical basis for the clinical used.%蜂毒是由蜜蜂毒腺分泌的活性物质,其中很多活性成分具有抗炎、抗肿瘤、镇痛、降压的作用。近年来,国内外很多科学家对蜂毒的活性成分及其基因结构、药理作用机制、分子生物学等方面进行了研究,并且取得了重要的研究进展。本文总结了蜂毒的主要活性成分以及主要的药理作用,为蜂毒的临床应用提供理论基础。

  3. The characterization of high-affinity binding sites in rat brain for the mast cell-degranulating peptide from bee venom using the purified monoiodinated peptide.

    Science.gov (United States)

    Taylor, J W; Bidard, J N; Lazdunski, M

    1984-11-25

    The preparation of a pure, monoiodinated derivative of mast cell-degranulating peptide (MCD peptide), the mast cell-degranulating peptide from bee venom, has enabled us to identify binding sites in rat brain membranes that have a high affinity and specificity for this peptide. These binding sites are evenly distributed throughout the brain and copurify with synaptic membranes. Saturation-binding curves, determined by rapid centrifugation or filtration assays, indicate a single population of sites with a concentration of 200 fmol/mg membrane protein in partially fractionated, lysed brain membranes. Dissociation constants of 150 and 140 pM were calculated for the iodinated and native peptides, respectively. These binding sites are probably associated with the neurotoxic action of MCD peptide in the central nervous system. No similar binding sites have been identified in peripheral tissue preparations, and other polycationic mast cell-degranulating agents including compound 48/80 show no such specificity. Specific modification of the primary amines, arginine residues, or disulfide bridges of MCD peptide results in a complete loss of binding activity. Other components of bee venom show specificity for the MCD peptide-binding site, suggesting that a class of neurotoxins in bee venom (possibly including secapin and tertiapin, but not apamin) share the specific action of MCD peptide on the central nervous system. PMID:6501283

  4. Synergism between basic Asp49 and Lys49 phospholipase A2 myotoxins of viperid snake venom in vitro and in vivo.

    Directory of Open Access Journals (Sweden)

    Diana Mora-Obando

    Full Text Available Two subtypes of phospholipases A2 (PLA2s with the ability to induce myonecrosis, 'Asp49' and 'Lys49' myotoxins, often coexist in viperid snake venoms. Since the latter lack catalytic activity, two different mechanisms are involved in their myotoxicity. A synergism between Asp49 and Lys49 myotoxins from Bothrops asper was previously observed in vitro, enhancing Ca2+ entry and cell death when acting together upon C2C12 myotubes. These observations are extended for the first time in vivo, by demonstrating a clear enhancement of myonecrosis by the combined action of these two toxins in mice. In addition, novel aspects of their synergism were revealed using myotubes. Proportions of Asp49 myotoxin as low as 0.1% of the Lys49 myotoxin are sufficient to enhance cytotoxicity of the latter, but not the opposite. Sublytic amounts of Asp49 myotoxin also enhanced cytotoxicity of a synthetic peptide encompassing the toxic region of Lys49 myotoxin. Asp49 myotoxin rendered myotubes more susceptible to osmotic lysis, whereas Lys49 myotoxin did not. In contrast to myotoxic Asp49 PLA2, an acidic non-toxic PLA2 from the same venom did not markedly synergize with Lys49 myotoxin, revealing a functional difference between basic and acidic PLA2 enzymes. It is suggested that Asp49 myotoxins synergize with Lys49 myotoxins by virtue of their PLA2 activity. In addition to the membrane-destabilizing effect of this activity, Asp49 myotoxins may generate anionic patches of hydrolytic reaction products, facilitating electrostatic interactions with Lys49 myotoxins. These data provide new evidence for the evolutionary adaptive value of the two subtypes of PLA2 myotoxins acting synergistically in viperid venoms.

  5. Daboxin P, a Major Phospholipase A2 Enzyme from the Indian Daboia russelii russelii Venom Targets Factor X and Factor Xa for Its Anticoagulant Activity

    Science.gov (United States)

    Iyer, Janaki Krishnamurthy; Shih, Norrapat; Majumder, Munmi; Mattaparthi, Venkata Satish Kumar; Mukhopadhyay, Rupak; Doley, Robin

    2016-01-01

    In the present study a major protein has been purified from the venom of Indian Daboia russelii russelii using gel filtration, ion exchange and Rp-HPLC techniques. The purified protein, named daboxin P accounts for ~24% of the total protein of the crude venom and has a molecular mass of 13.597 kDa. It exhibits strong anticoagulant and phospholipase A2 activity but is devoid of any cytotoxic effect on the tested normal or cancerous cell lines. Its primary structure was deduced by N-terminal sequencing and chemical cleavage using Edman degradation and tandem mass spectrometry. It is composed of 121 amino acids with 14 cysteine residues and catalytically active His48 -Asp49 pair. The secondary structure of daboxin P constitutes 42.73% of α-helix and 12.36% of β-sheet. It is found to be stable at acidic (pH 3.0) and neutral pH (pH 7.0) and has a Tm value of 71.59 ± 0.46°C. Daboxin P exhibits anticoagulant effect under in-vitro and in-vivo conditions. It does not inhibit the catalytic activity of the serine proteases but inhibits the activation of factor X to factor Xa by the tenase complexes both in the presence and absence of phospholipids. It also inhibits the tenase complexes when active site residue (His48) was alkylated suggesting its non-enzymatic mode of anticoagulant activity. Moreover, it also inhibits prothrombinase complex when pre-incubated with factor Xa prior to factor Va addition. Fluorescence emission spectroscopy and affinity chromatography suggest the probable interaction of daboxin P with factor X and factor Xa. Molecular docking analysis reveals the interaction of the Ca+2 binding loop; helix C; anticoagulant region and C-terminal region of daboxin P with the heavy chain of factor Xa. This is the first report of a phospholipase A2 enzyme from Indian viper venom which targets both factor X and factor Xa for its anticoagulant activity. PMID:27089306

  6. Daboxin P, a Major Phospholipase A2 Enzyme from the Indian Daboia russelii russelii Venom Targets Factor X and Factor Xa for Its Anticoagulant Activity.

    Directory of Open Access Journals (Sweden)

    Maitreyee Sharma

    Full Text Available In the present study a major protein has been purified from the venom of Indian Daboia russelii russelii using gel filtration, ion exchange and Rp-HPLC techniques. The purified protein, named daboxin P accounts for ~24% of the total protein of the crude venom and has a molecular mass of 13.597 kDa. It exhibits strong anticoagulant and phospholipase A2 activity but is devoid of any cytotoxic effect on the tested normal or cancerous cell lines. Its primary structure was deduced by N-terminal sequencing and chemical cleavage using Edman degradation and tandem mass spectrometry. It is composed of 121 amino acids with 14 cysteine residues and catalytically active His48 -Asp49 pair. The secondary structure of daboxin P constitutes 42.73% of α-helix and 12.36% of β-sheet. It is found to be stable at acidic (pH 3.0 and neutral pH (pH 7.0 and has a Tm value of 71.59 ± 0.46°C. Daboxin P exhibits anticoagulant effect under in-vitro and in-vivo conditions. It does not inhibit the catalytic activity of the serine proteases but inhibits the activation of factor X to factor Xa by the tenase complexes both in the presence and absence of phospholipids. It also inhibits the tenase complexes when active site residue (His48 was alkylated suggesting its non-enzymatic mode of anticoagulant activity. Moreover, it also inhibits prothrombinase complex when pre-incubated with factor Xa prior to factor Va addition. Fluorescence emission spectroscopy and affinity chromatography suggest the probable interaction of daboxin P with factor X and factor Xa. Molecular docking analysis reveals the interaction of the Ca+2 binding loop; helix C; anticoagulant region and C-terminal region of daboxin P with the heavy chain of factor Xa. This is the first report of a phospholipase A2 enzyme from Indian viper venom which targets both factor X and factor Xa for its anticoagulant activity.

  7. Identification and characterization of a phospholipase A2 from the venom of the Saw-scaled viper: Novel bactericidal and membrane damaging activities.

    Science.gov (United States)

    Perumal Samy, Ramar; Gopalakrishnakone, P; Bow, Ho; Puspharaj, Peter N; Chow, Vincent T K

    2010-12-01

    Phospholipase A(2) (PLA(2)), a common toxic component of snake venom, has been implicated in various pharmacological effects. In this study, a basic myotoxic PLA(2), named EcTx-I was isolated from Echis carinatus snake venom by using gel filtration on Superdex G-75, and reverse phase HPLC on C18 and C8 Sepharose columns. PLA(2), EcTx-I was 13,861.72 molecular weight as estimated by MALDI-TOF (15 kD by SDS-PAGE), and consisted of 121 amino acid residues cross-linked by seven disulfide bonds. The N-terminal sequences revealed significant homology with basic myotoxic PLA(2)s from other snake venoms. The purified PLA(2) EcTx-I was evaluated (250 μg/ml) for bactericidal activity of a wide variety of human pathogens against Burkholderia pseudomallei (KHW&TES), Enterobacter aerogenes, Escherichia coli, Proteus vulgaris, Proteus mirabilis, Pseudomonas aeruginosa and Staphylococcus aureus. EcTx-I showed strong antibacterial activity against B. pseudomallei (KHW) and E. aerogenes among the tested bacteria. Other Gram-negative and Gram-positive bacteria showed only a moderate effect. However, the Gram-positive bacterium E. aerogenes failed to show any effect on EcTx-I protein at tested doses. The most significant bacteriostatic and bactericidal effect of EcTx-I was observed at MICs of >15 μg/ml against (B. pseudomallei, KHW) and MICs >30 μg/ml against E. aerogenes. Mechanisms of bactericidal and membrane damaging effects were proved by ultra-structural analysis. EcTx-I was able to induce cytotoxicity on THP-1 cells in vitro as well as lethality in BALB/c mice. EcTx-I also induced mild myotoxic effects on mouse skin, but was devoid of hemolytic effects on human erythrocytes up to 500 μg/ml. It is shown that the toxic effect induced by E. carinatus venom is due to the presence of myotoxic PLA(2) (EcTx-I). The result also corroborates the hypothesis of an association between toxic and enzymatic domains. In conclusion, EcTx-I displays a heparin binding C-terminal region

  8. Study of four weeks repeated-dose toxic test of Sweet Bee Venom in rats Original Articles

    Directory of Open Access Journals (Sweden)

    Kwon Hae-Yon

    2011-03-01

    Full Text Available Objectives: This study was performed to analyse four weeks repeated -dose toxicity of Sweet Bee Venom (SBV-pure melittin, the major component of honey bee venom in rats. Methods: All experiments were conducted under the regulations of Good Laboratory Practice (GLPat Biotoxtech Company, a non-clinical study authorized institution. Male and female rats of 5 weeks old were chosen for the pilot study of four weeks repeated-dose toxicity and was injected at the level of 0.56 mg/kg body weight (eighty times higher than the clinical application dosage as the high dosage, followed by 0.28 and 0.14 mg/kg as midium and low dosage, respectively. Equal amount of normal saline was injected as the control group every day for four weeks. Results: 1. No mortality was witnessed in all of the experiment groups. 2. All experiment groups appealed pain sense in the treating time compared to the control group, and side effects such as hyperemia and movement disorder were observed around the area of injection in all experiment groups, and the higher dosage in treatment, the higher occurrence in side effects. 3. Concerning weight measurement, neither male nor female groups showed significant changes compared to the control group. 4. Concerning to the CBC and biochemistry, all experiment groups didn't show any significant changes compared to the control group. 5. Concerning weight measurement of organs, experiment groups didn't show any significant changes compared to the control group. 6. To verify abnormalities of organs and tissues, those such as cerebellum, cerebrum, liver, lung, kidney,and spinal cords were removed and we conducted histologocal observation with H-E staining.Concerning the histologocal observation of liver tissues, some fatty changes were observed around portal vein in 0.56 mg/kg experiment group. But another organs were not detected in any abnormalities. 7. The proper high dosage of SBV for the thirteen weeks repeated test in rats may be 0.28 mg

  9. Study of a 13-weeks, Repeated, Intramuscular Dose, Toxicity Test of Sweet Bee Venom in Sprague-Dawley Rats

    Directory of Open Access Journals (Sweden)

    Hyunmin Kang

    2014-06-01

    Full Text Available Objectives:This study was performed to analyze a 13-week repeated dose toxicity test of Sweet Bee Venom (SBV extracted from bee venom and administered in Sprague-Dawley (SD rats. Methods:Male and female 5-week-old SD rats were treated once daily with SBV (high-dosage group: 0.28 mg/kg; medium-dosage group: 0.14 mg/kg; or low-dosage group: 0.07 mg/kg for 13 weeks. Normal saline was administered to the control group in a similar manner (0.2 mL/kg. We conducted clinical observations, body weight measurements, ophthalmic examinations, urinalyses, hematology and biochemistry tests, and histological observations using hematoxylin and eosin (H&E staining to identify any abnormalities caused by the SBV treatment. Results:During this study, no mortality was observed in any of the experimental groups. Hyperemia and a movement disorder were observed around the area of in all groups that received SBV treatment, with a higher occurrence in rats treated with a higher dosage. Male rats receiving in the high-dosage group showed a significant decrease in weight during the treatment period. Compared to the control group, no significant changes in the ophthalmic parameters, the urine analyses, the complete blood cell count (CBC, and the biochemistry in the groups treated with SBV. Compared to the control group, some changes in organ weights were observed in the medium-and the high-dosage groups, but the low-dosage group showed no significant changes. Histological examination of thigh muscle indicated cell infiltration, inflammation, degeneration, and necrosis of muscle fiber, as well as fibrosis, in both the medium- and the high-dosage groups. Fatty liver change was observed in the periportal area of rats receiving medium and high dosages of SBV. No other organ abnormalities were observed. Conclusion:Our findings suggest that the No Observed Adverse Effect Level (NOAEL of SBV is approximately 0.07 mg/kg in male and female SD rats.

  10. Clinical features and treatment of ocular trauma caused by bee venom%蜂毒性眼外伤的临床特征与治疗

    Institute of Scientific and Technical Information of China (English)

    张红; 王雨生

    2014-01-01

    Objective To investigate the pathogenesis,clinical features and treatment methods of ocular trauma caused by bee venom.Methods Data of 49 eyes of 43 patients with ocular trauma caused by bee venom were retrospectively analyzed.The clinical features,complications,treatment of ocular trauma caused by different species of bee and visual acuity after treatment were analyzed.Results The severity of injury was related to the location of bee sting.The stings on or around the eyelid were mild,but the corneal or conjunctival stings were severe with long treatment time and poor visual prognosis.The main type of bee was honey bee,followed by the wasps,hornets and other bee species; The honey bee sting was mild,the sting by wasp and hornet was relatively severe,and the sting by other bees was mild or severe.Conclusion The severity and prognosis of ocular trauma are closely related to wasp species and stings location ; Timely and correct treatments are essential for vision improvement.%目的 探讨蜂毒性眼外伤的发病机制、临床特征和治疗方法.方法 回顾2007年6月至2013年10月诊治的蜂毒性眼外伤43例(49眼).分析不同蜂种所致眼外伤的临床特点、并发症、治疗方法及治疗后视力.结果 患者受伤的严重程度与毒蜂蜇伤的部位有关,眼睑及周围组织蜇伤病情较轻,而角膜、结膜蜇伤则病情较重,治疗时间较长,视力结果较差.毒蜂种类以蜜蜂最为多见,其次是虎头蜂、黄蜂及其他蜂种;其中蜜蜂蜇伤病情较轻,虎头蜂和黄蜂相对较重,其他蜂种蜇伤有轻有重.结论 该类眼外伤的严重程度及预后与毒蜂种类和蜇伤部位密切相关;受伤后及时就诊和正确治疗对视力改善及预后至关重要.

  11. Activation of Spinal α2-Adrenoceptors Using Diluted Bee Venom Stimulation Reduces Cold Allodynia in Neuropathic Pain Rats

    Directory of Open Access Journals (Sweden)

    Suk-Yun Kang

    2012-01-01

    Full Text Available Cold allodynia is an important distinctive feature of neuropathic pain. The present study examined whether single or repetitive treatment of diluted bee venom (DBV reduced cold allodynia in sciatic nerve chronic constriction injury (CCI rats and whether these effects were mediated by spinal adrenergic receptors. Single injection of DBV (0.25 or 2.5 mg/kg was performed into Zusanli acupoint 2 weeks post CCI, and repetitive DBV (0.25 mg/kg was injected for 2 weeks beginning on day 15 after CCI surgery. Single treatment of DBV at a low dose (0.25 mg/kg did not produce any anticold allodynic effect, while a high dose of DBV (2.5 mg/kg significantly reduced cold allodynia. Moreover, this effect of high-dose DBV was completely blocked by intrathecal pretreatment of idazoxan (α2-adrenoceptor antagonist, but not prazosin (α1-adrenoceptor antagonist or propranolol (nonselective β-adrenoceptor antagonist. In addition, coadministration of low-dose DBV (0.25 mg/kg and intrathecal clonidine (α2-adrenoceptor agonist synergically reduced cold allodynia. On the other hand, repetitive treatments of low-dose DBV showing no motor deficit remarkably suppressed cold allodynia from 7 days after DBV treatment. This effect was also reversed by intrathecal idazoxan injection. These findings demonstrated that single or repetitive stimulation of DBV could alleviate CCI-induced cold allodynia via activation of spinal α2-adrenoceptor.

  12. Distinct contributions of reactive oxygen species in amygdala to bee venom-induced spontaneous pain-related behaviors.

    Science.gov (United States)

    Lu, Yun-Fei; Neugebauer, Volker; Chen, Jun; Li, Zhen

    2016-04-21

    Reactive oxygen species (ROS), such as superoxide and hydrogen peroxide, play essential roles in physiological plasticity and are also involved in the pathogenesis of persistent pain. Roles of peripheral and spinal ROS in pain have been well established, but much less is known about ROS in the amygdala, a brain region that plays an important role in pain modulation. The present study explored the contribution of ROS in the amygdala to bee venom (BV)-induced pain behaviors. Our data show that the amygdala is activated following subcutaneous BV injection into the left hindpaw, which is reflected in the increased number of c-Fos positive cells in the central and basolateral amygdala nuclei in the right hemisphere. Stereotaxic administration of a ROS scavenger (tempol, 10mM), NADPH oxidase inhibitor (baicalein, 5mM) or lipoxygenase inhibitor (apocynin, 10mM) into the right amygdala attenuated the BV-induced spontaneous licking and lifting behaviors, but had no effect on BV-induced paw flinch reflexes. Our study provides further evidence for the involvement of the amygdala in nociceptive processing and pain behaviors, and that ROS in amygdala may be a potential target for treatment strategies to inhibit pain. PMID:26971700

  13. [Allergy and neurotoxicity induced by bee sting. Case report and literature review].

    Science.gov (United States)

    Valencia Zavala, Martha Patricia; Sánchez Olivas, Jesús Alberto; Sánchez Olivas, Manuel Anastasio; Montes Montes, José; Duarte Díaz, Rosa Janet; León Oviedo, Cristóbal

    2007-01-01

    Under the heading of this subject we deal with stings by arthropods, making of bees, commenting on the composition of the poisons and the different local and general reactions that are differences that exist between the stings The venom contains many biologically active components such as melitin, phospholipase A2, apamin, mast cell degranulation peptide, hyaluronidase, histamine, and dopamine. That neurotoxic venom secretory phospholipases A2 (sPLA2) have specific receptors in brain membranes called N-type receptors that are likely to play a role in the molecular events leading to neurotoxicity of these proteins. The sPLA2 found in honeybee venom is neurotoxic and binds to this receptor with high affinity. Poneratoxin is small neuropeptide found in the venom of arthropod (bee). It is stored in the venom reservoir as a inactive 25 residue peptide. Here we describe both chemically synthesized poneratoxin, insect larvae were paralyzed by injection of either of the purified toxins. These toxins are used in research as molecular probes, targeting with high affinity selected ion channel subtypes. As such, they are very useful for understanding the mechanism of synaptic transmission. Poneratoxin affects the voltage-dependent sodium channels and blocks the synaptic transmission in the insect central nervous system in a concentration-dependent manner; we think that in the human this is same. PMID:18693540

  14. Analyses of Group III Secreted Phospholipase A2 Transgenic Mice Reveal Potential Participation of This Enzyme in Plasma Lipoprotein Modification, Macrophage Foam Cell Formation, and Atherosclerosis*S⃞

    OpenAIRE

    Sato, Hiroyasu; Kato, Rina; Isogai, Yuki; Saka, Go-ichi; Ohtsuki, Mitsuhiro; Taketomi, Yoshitaka; Yamamoto, Kei(Department of Physics, Niigata University, Niigata 950-2181, Japan); Tsutsumi, Kae; Yamada, Joe; Masuda, Seiko; Ishikawa, Yukio; Ishii, Toshiharu; Kobayashi, Tetsuyuki; Ikeda, Kazutaka; Taguchi, Ryo

    2008-01-01

    Among the many mammalian secreted phospholipase A2 (sPLA2) enzymes, PLA2G3 (group III secreted phospholipase A2) is unique in that it possesses unusual N- and C-terminal domains and in that its central sPLA2 domain is homologous to bee venom PLA2 rather than to other mammalian sPLA2s. To elucidate the in vivo actions of this atypical sPLA2, we generated transgenic (Tg) mice overexpressing human PLA2G3. Despite marked increases in PLA2 activity and mature 18-kDa PLA...

  15. Purification and partial characterization of phospholipases A2 from Bothrops asper (barba amarilla snake venom from Chiriguaná (Cesar, Colombia

    Directory of Open Access Journals (Sweden)

    J. Ramírez-Avila

    2004-01-01

    Full Text Available Components with phospholipase A2 activity were isolated by gel filtration and cationic exchange chromatography from the venom of Bothrops asper snakes from Chiriguaná, Colombia (9°22´N; 73°37´W. Five fractions were obtained by the gel filtration, and PLA2 activity was found in fraction 3 (F3. In the cationic exchange chromatography, F3 showed eight components with PLA2 activity. Six of these components appeared as one band in polyacrylamide gel electrophoresis (SDS-PAGE. Fractions II and VII exhibited an optimal activity at pH 9 and 52ºC. The optimum calcium concentration for fraction II was 48 mM and for fraction VII, 384 mM. Both fractions showed thermal stability. Fraction II was stable at pH values between 2.5 and 9, and fraction VII, between 2.5 and 8. The Michaelis Menten constant (K M was 3.5x10-3 M for fraction II and 1.6x10-3 M for fraction VII. The molecular weight was 16,000 Dalton for fraction II and 17,000 Dalton for fraction VII. Both isoenzymes did not show any toxic activity (DL50 at 5.3 and 4 µg/g. The two fractions showed different kinetic constant (K M, calcium requirement, and substrate specificity for haemolytic activity.

  16. Nationwide Survey of Patient Knowledge and Attitudes towards Human Experimentation Using Stem Cells or Bee Venom Acupuncture for Parkinson’s Disease

    Directory of Open Access Journals (Sweden)

    2014-10-01

    Full Text Available ObjectiveStem cell treatment is a well-recognized experimental treatment among patients with Parkinson’s disease (PD, for which there are high expectations of a positive impact. Acupuncture with bee venom is one of the most popular complementary and alternative treatments for PD. Patient knowledge and attitudes towards these experimental treatments are unknown. MethodsUsing a 12-item questionnaire, a nationwide survey was conducted of 963 PD patients and 267 caregivers in 44 Korean Movement Disorders Society member hospitals from April 2013 to June 2013. The survey was performed by trained interviewers using conventional methods. ResultsRegarding questions on experimental treatments using stem cells or bee venom acupuncture, 5.1–17.7% of PD patients answered questions on safety, efficacy, and evidence-based practice incorrectly; however, more than half responded that they did not know the correct answer. Although safety and efficacy have not been established, 55.5% of PD patients responded that they were willing to receive stem cell treatment. With regard to participating in experimental treatments, there was a strong correlation between stem cell treatment and bee venom acupuncture (p < 0.0001, odds ratio = 5.226, 95% confidence interval 3.919–6.969. Younger age, higher education, and a longer duration of PD were all associated with a correct understanding of experimental treatments. ConclusionsOur data suggest that relatively few PD patients correctly understand the safety and efficacy of experimental treatments and that PD patients are greatly interested in new treatments. We hope that our data will be used to educate or to plan educational programs for PD patients and caregivers.

  17. Nationwide Survey of Patient Knowledge and Attitudes towards Human Experimentation Using Stem Cells or Bee Venom Acupuncture for Parkinson’s Disease

    Science.gov (United States)

    Chung, Sun Ju; Koh, Seong Beom; Ju, Young-Su; Kim, Jae Woo

    2014-01-01

    Objective Stem cell treatment is a well-recognized experimental treatment among patients with Parkinson’s disease (PD), for which there are high expectations of a positive impact. Acupuncture with bee venom is one of the most popular complementary and alternative treatments for PD. Patient knowledge and attitudes towards these experimental treatments are unknown. Methods Using a 12-item questionnaire, a nationwide survey was conducted of 963 PD patients and 267 caregivers in 44 Korean Movement Disorders Society member hospitals from April 2013 to June 2013. The survey was performed by trained interviewers using conventional methods. Results Regarding questions on experimental treatments using stem cells or bee venom acupuncture, 5.1–17.7% of PD patients answered questions on safety, efficacy, and evidence-based practice incorrectly; however, more than half responded that they did not know the correct answer. Although safety and efficacy have not been established, 55.5% of PD patients responded that they were willing to receive stem cell treatment. With regard to participating in experimental treatments, there was a strong correlation between stem cell treatment and bee venom acupuncture (p < 0.0001, odds ratio = 5.226, 95% confidence interval 3.919–6.969). Younger age, higher education, and a longer duration of PD were all associated with a correct understanding of experimental treatments. Conclusions Our data suggest that relatively few PD patients correctly understand the safety and efficacy of experimental treatments and that PD patients are greatly interested in new treatments. We hope that our data will be used to educate or to plan educational programs for PD patients and caregivers. PMID:25360232

  18. The Research Progress of Venom Immunotherapy for Bee Stings%蜂蜇伤蜂毒免疫治疗的研究进展

    Institute of Scientific and Technical Information of China (English)

    赵燕(综述); 张帆; 曹灵红(审校)

    2016-01-01

    Bee sting symptoms are different according to the injury level,which even include multiple organ dysfunction syndrome or death in serious cases.Symptomatic treatments are mainly adopted in China:the mild ones may only need traditional Chinese medicine ,but the serious ones combined with multiple organ dysfunction syndrome,need to be treated in the intensive care unit.The venom immunotherapy following bee stings can reduce the early anaphylactic reaction,obtain active immunization of bee stings,prevent more seri-ous or even fatal allergic reactions,and reduce the death caused by severe allergic reactions in clinical prac-tice.However, the venom immunotherapy,which is prevalent overseas,is not generalized in China.It has been widely used in the treatment of bee stings and plays an important role in reducing the serious complica-tions,as many clinical practices have proved ,the venom immunotherapy is worthy of being promoted in pre-venting and treating bee sting injuries in China .%蜂蜇伤后根据其损伤的程度出现不同的症状,有的甚至出现多器官功能障碍综合征而死亡。目前国内关于蜂蜇伤的治疗主要是对症处理,轻症者用蛇药等中药解毒对症处理,重症蜂蜇伤并发多器官功能衰竭,常见的处理方式即是重症监护病房综合治疗。而蜂蜇伤的蜂毒免疫治疗,可以减轻早期的过敏反应,获得对蜂毒的主动免疫,防止更为严重的甚至致死性的过敏反应,在临床上可以减少因严重过敏反应引起的死亡。目前在国内尚未开展,而在国外运用较多,已广泛应用于蜂蛰伤的治疗,对于减轻蜂蛰伤后严重并发症有重要作用,众多临床实践证明,蜂毒免疫治疗在我国防治蜂蜇伤方面具有极大的推广价值。

  19. Crystal structure of pira toxin-I: a calcium-independent, myotoxic phospholipase A2 - homologue from Bothrops pirajai venom

    International Nuclear Information System (INIS)

    Full text. Phospho lipases A2 (PLA2) are small enzymes that specifically hydrolysed the sn-2 ester bond of phospholipids, preferentially in lamellar or micellar aggregates at membrane surfaces. These enzymes are widely distributed in nature and have been extensively studied. Toxic proteins from venoms from Bothrops species include catalytically active PLA2s and calcium independent PLA2Lys 49 homologues. The substitution of Asp49 by Lys greatly diminishes the ability of these PLA2 to bind calcium, an ion that plays a critical role in the stabilization of the tetrahedral transition state intermediate in the catalytic mechanism. The Lys 49 PLA2 homologues and therefore catalytically inactive yet maintain cytolytic and myotoxic activities and furthermore retain the ability to disrupt the integrity of both plasma membranes and model lipid bilayers by a poorly understood Ca 2+ independente mechanism. Lys49 PLA2 homologues demonstrate a specific toxic activity against skeletal muscle, affecting only muscle fibers and leaving other tissue structure such as connective tissue, nerves and vessels essentially unharmed. In order to improve our understanding of the molecular basis of the myotoxic and Ca 2+ -independent membrane damaging activities, we have determined the crystal structure of Pr TX-I, a Lys49 variant from the venom of B. pirajai. The model presented has been determined at 2.8 angstrom resolution and refined to a crystallographic residual of 19.7% (Rfree=29.7%). (author)

  20. Effectiveness of bee venom acupuncture in alleviating post-stroke shoulder pain:a systematic review and meta-analysis

    Institute of Scientific and Technical Information of China (English)

    Sung Min Lim; Sook-Hyun Lee

    2015-01-01

    BACKGROUND:Shoulder pain is a common complication of stroke. Bee venom acupuncture (BVA) is increasingly used in the treatment of post-stroke shoulder pain. OBJECTIVE: To summarize and evaluate evidence on the effectiveness of BVA in relieving shoulder pain after stroke. SEARCH STRATEGY: Nine databases, namely MEDLINE, EMBASE, the Cochrane Library, the China National Knowledge Infrastructure (CNKI), the Japan Science and Technology Information Aggregator, Electronic (J-STAGE), and four Korean medical databases, namely, the National Assembly Library, the Research Information Service System, the National Discovery for Science Leaders, and OASIS, were searched from their inception through August 2014 without language restrictions. INCLUSION CRITERIA: Randomized controled trials (RCTs) were included if BVA was used at acupoints as the sole treatment, or as an adjunct to other treatments, for shoulder pain after stroke. DATA EXTRACTION AND ANALYSIS:Two review authors independently selected trials for inclusion, assessed methodological quality and extracted data. RESULTS: A total of 138 potentialy relevant articles were identiifed, 4 of which were RCTs that met our inclusion criteria. The quality of studies included was generaly low, and a preponderance of positive results was demonstrated. Al four trials reported favorable effects of BVA on shoulder pain after stroke. Two RCTs assessing the effects of BVA on post-stroke shoulder pain, as opposed to saline injections, were included in the meta-analysis. Pain was signiifcantly lower for BVA than for saline injections (standardized mean difference on 10-cm visual analog scale: 1.46 cm, 95% CI = 0.30–2.62,P = 0.02, n = 86) CONCLUSION: This review provided evidence suggesting that BVA is effective in relieving shoulder pain after stroke. However, further studies are needed to conifrm the role of BVA in aleviating post-stroke shoulder pain. Future studies should be conducted with large samples and rigorous study designs.

  1. Evidence for α-helices in the gas phase: a case study using Melittin from honey bee venom.

    Science.gov (United States)

    Florance, Hannah V; Stopford, Andrew P; Kalapothakis, Jason M; McCullough, Bryan J; Bretherick, Andrew; Barran, Perdita E

    2011-09-01

    Gas phase methodologies are increasingly used to study the structure of proteins and peptides. A challenge to the mass spectrometrist is to preserve the structure of the system of interest intact and unaltered from solution into the gas phase. Small peptides are very flexible and can present a number of conformations in solution. In this work we examine Melittin a 26 amino acid peptide that forms the active component of honey bee venom. Melittin is haemolytic and has been shown to form an α-helical tetrameric structure by X-ray crystallography [M. Gribskov et al., The RCSB Protein Data Bank, 1990] and to be helical in high concentrations of methanol. Here we use ion mobility mass spectrometry, molecular dynamics and gas-phase HDX to probe its structure in the gas phase and specifically interrogate whether the helical form can be preserved. All low energy calculated structures possess some helicity. In our experiments we examine the peptide following nano-ESI from solutions with varying methanol content. Ion mobility gives collision cross sections (CCS) that compare well with values found from molecular modelling and from other reported structures, but with inconclusive results regarding the effect of solvent. There is only a slight increase in CCS with charge, showing minimal coloumbically driven unfolding. HDX supports preservation of some helical content into the gas phase and again shows little difference in the exchange rates of species sprayed from different solvents. The [M + 3H](3+) species has two exchanging populations both of which exhibit faster exchange rates than observed for the [M + 2H](2+) species. One interpretation for these results is that the time spent being analysed is sufficient for this peptide to form a helix in the 'ultimate' hydrophobic environment of a vacuum. PMID:21701716

  2. Expression pattern of three-finger toxin and phospholipase A2 genes in the venom glands of two sea snakes, Lapemis curtus and Acalyptophis peronii: comparison of evolution of these toxins in land snakes, sea kraits and sea snakes

    Directory of Open Access Journals (Sweden)

    Fry Bryan G

    2007-09-01

    Full Text Available Abstract Background Snake venom composition varies widely both among closely related species and within the same species, based on ecological variables. In terrestrial snakes, such variation has been proposed to be due to snakes' diet. Land snakes target various prey species including insects (arthropods, lizards (reptiles, frogs and toads (amphibians, birds (aves, and rodents (mammals, whereas sea snakes target a single vertebrate class (fishes and often specialize on specific types of fish. It is therefore interesting to examine the evolution of toxins in sea snake venoms compared to that of land snakes. Results Here we describe the expression of toxin genes in the venom glands of two sea snakes, Lapemis curtus (Spine-bellied Sea Snake and Acalyptophis peronii (Horned Sea Snake, two members of a large adaptive radiation which occupy very different ecological niches. We constructed cDNA libraries from their venom glands and sequenced 214 and 192 clones, respectively. Our data show that despite their explosive evolutionary radiation, there is very little variability in the three-finger toxin (3FTx as well as the phospholipase A2 (PLA2 enzymes, the two main constituents of Lapemis curtus and Acalyptophis peronii venom. To understand the evolutionary trends among land snakes, sea snakes and sea kraits, pairwise genetic distances (intraspecific and interspecific of 3FTx and PLA2 sequences were calculated. Results show that these proteins appear to be highly conserved in sea snakes in contrast to land snakes or sea kraits, despite their extremely divergent and adaptive ecological radiation. Conclusion Based on these results, we suggest that streamlining in habitat and diet in sea snakes has possibly kept their toxin genes conserved, suggesting the idea that prey composition and diet breadth may contribute to the diversity and evolution of venom components.

  3. Structural identification by mass spectrometry of a novel antimicrobial peptide from the venom of the solitary bee Osmia rufa (Hymenoptera: Megachilidae).

    Science.gov (United States)

    Stöcklin, Reto; Favreau, Philippe; Thai, Robert; Pflugfelder, Jochen; Bulet, Philippe; Mebs, Dietrich

    2010-01-01

    The venom from the solitary bee Osmia rufa (Hymenoptera: Megachilidae) was analyzed using mass spectrometry (MS)-based techniques. Sensitive proteomic methods such as on-line LC-ESI-MS and nanoESI-MS analyses revealed more than 50 different compounds with molecular masses ranging from 400 to 4000Da. The major component has a monoisotopic molecular mass of 1924.20Da and its amino acid sequence was elucidated by de novo sequencing using tandem mass spectrometry and Edman degradation. This 17-residue cysteine-free peptide, named osmin, shows some similarities with the mast cell degranulation (MCD) peptide family. Free acid and C-terminally amidated osmins were chemically synthesized and tested for antimicrobial and haemolytic activities. The synthetic C-amidated peptide (native osmin) was found to be about three times more haemolytic than its free acid counterpart, but both peptides are much less lytic than melittin from social bee venom. Preliminary antimicrobial and antifungal tests indicate that both peptides are able to inhibit bacterial and fungal growth at micromolar concentrations. PMID:19109988

  4. Anti-parasitic effect on Toxoplasma gondii induced by BnSP-7, a Lys49-phospholipase A2 homologue from Bothrops pauloensis venom.

    Science.gov (United States)

    Borges, Isabela Pacheco; Castanheira, Letícia Eulalio; Barbosa, Bellisa Freitas; de Souza, Dayane Lorena Naves; da Silva, Rafaela José; Mineo, José Roberto; Tudini, Kelly Aparecida Yoneyama; Rodrigues, Renata Santos; Ferro, Eloísa Amália Vieira; de Melo Rodrigues, Veridiana

    2016-09-01

    Toxoplasmosis affects a third of the global population and presents high incidence in tropical areas. Its great relevance in public health has led to a search for new therapeutic approaches. Herein, we report the antiparasitic effects of BnSP-7 toxin, a Lys49 phospholipase A2 (PLA2) homologue from Bothrops pauloensis snake venom, on Toxoplasma gondii. In an MTT assay, BnSP-7 presented significant cytotoxicity against host HeLa cells at higher doses (200 μg/mL to 50 μg/mL), whereas lower doses (25 μg/mL to 1.56 μg/mL) produced low cytotoxicity. Furthermore, the toxin showed no effect on T. gondii tachyzoite viability when evaluated by trypan blue exclusion, but decreased both adhesion and parasite proliferation when tachyzoites were treated before infection. We also measured cytokines in supernatants collected from HeLa cells infected with T. gondii tachyzoites previously treated with RPMI or BnSP-7, which revealed enhancement of only MIF and IL-6 cytokines levels in supernatants of HeLa cells after BnSP-7 treatment. Our results showed that the BnSP-7 PLA2 exerts an anti-Toxoplasma effect at a lower dose than that required to induce cytotoxicity in HeLa cells, and also modulates the immune response of host cells. In this sense, the anti-parasitic effect of BnSP-7 PLA2 demonstrated in the present study opens perspectives for use of this toxin as a tool for future studies on toxoplasmosis. PMID:27212627

  5. IgG antibodies against phospholipase A2 from Crotalus durissus terrificus: cross-reaction with venoms from Bothrops species from Argentina

    OpenAIRE

    JP Rodríguez; MC De Marzi; S Maruñak; P Teibler; O Acosta; EL Malchiodi; LC Leiva

    2009-01-01

    We examined the ability of IgG anti-crotalic PLA2 to cross-react with Bothrops spp. venoms, from snakes found in the northeast of Argentina. Immunoblotting and ELISA tests showed that IgG anti-crotalic PLA2 recognize antigens of bothropic venoms. Indirect hemolytic activity tests showed that the quantity of antibodies that neutralized 50% of Crotalus durissus terrificus venom (ED50: 2.1 mg IgG anti-crotalic PLA2/100 µg of venom) were also able to neutralize venom from other snakes in the foll...

  6. Bee Venom Acupuncture Alleviates Experimental Autoimmune Encephalomyelitis by Upregulating Regulatory T Cells and Suppressing Th1 and Th17 Responses.

    Science.gov (United States)

    Lee, Min Jung; Jang, Minhee; Choi, Jonghee; Lee, Gihyun; Min, Hyun Jung; Chung, Won-Seok; Kim, Jong-In; Jee, Youngheun; Chae, Younbyoung; Kim, Sung-Hoon; Lee, Sung Joong; Cho, Ik-Hyun

    2016-04-01

    The protective and therapeutic mechanism of bee venom acupuncture (BVA) in neurodegenerative disorders is not clear. We investigated whether treatment with BVA (0.25 and 0.8 mg/kg) at the Zusanli (ST36) acupoints, located lateral from the anterior border of the tibia, has a beneficial effect in a myelin basic protein (MBP)(68-82)-induced acute experimental autoimmune encephalomyelitis (EAE) rat model. Pretreatment (every 3 days from 1 h before immunization) with BVA was more effective than posttreatment (daily after immunization) with BVA with respect to clinical signs (neurological impairment and loss of body weight) of acute EAE rats. Treatment with BVA at the ST36 acupoint in normal rats did not induce the clinical signs. Pretreatment with BVA suppressed demyelination, glial activation, expression of cytokines [interferon (IFN)-γ, IL-17, IL-17A, tumor necrosis factor-alpha (TNF-α), and IL-1β], chemokines [RANTES, monocyte chemotactic protein-1 (MCP-1), and macrophage inflammatory protein (MIP)-1α], and inducible nitric oxide synthase (iNOS), and activation of p38 mitogen-activated protein kinase (MAPK) and nuclear factor (NF)-κB (p65 and phospho-IκBα) signaling pathways in the spinal cord of acute EAE rats. Pretreatment with BVA decreased the number of CD4(+), CD4(+)/IFN-γ(+), and CD4(+)/IL-17(+) T cells, but increased the number of CD4(+)/Foxp3(+) T cells in the spinal cord and lymph nodes of acute EAE rats. Treatment with BVA at six placebo acupoints (SP9, GB39, and four non-acupoints) did not have a positive effect in acute EAE rats. Interestingly, onset and posttreatment with BVA at the ST36 acupoint markedly attenuated neurological impairment in myelin oligodendrocyte glycoprotein (MOG)(35-55)-induced chronic EAE mice compared to treatment with BVA at six placebo acupoints. Our findings strongly suggest that treatment with BVA with ST36 acupoint could delay or attenuate the development and progression of EAE by upregulating regulatory T cells and

  7. A case report of monitoring PSA level changes in two prostate cancer patients treated with Mountain Ginseng Pharmacopuncture and Sweet Bee Venom along with western anticancer therapy

    Directory of Open Access Journals (Sweden)

    Yeonhee Lee

    2011-12-01

    Full Text Available Objectives: The purpose of this report is to find out how Mountain Ginseng Pharmacopuncture(MGP and Sweet Bee Venom(SBV treatments are effective on prostate cancer patients by monitoring Prostate specific antigen(PSA values. Methods: We treated two prostate cancer patients with MGP and SBV from October 2008 to April 2011. One patient had localized prostate cancer, the other was in the terminal stage of prostate cancer with lung and bone metastasis and both had been receiving western anticancer therapy. We had monitored the changes of PSA value. Results: In case 1, MGP and SBV treatments seemed to be helpful in preventing the recurrence of localized prostate cancer. In case 2, PSA value was decreased by MGP treatment. Conclusions: It is conceivable that MGP and SBV are effective treatments for patients with prostate cancer.

  8. Neuro-protective effects of bee venom by suppression of neuroinflammatory responses in a mouse model of Parkinson's disease: role of regulatory T cells.

    Science.gov (United States)

    Chung, Eun Sook; Kim, Himchan; Lee, Gihyun; Park, Soojin; Kim, Hyunseong; Bae, Hyunsu

    2012-11-01

    In the present study, we sought to determine whether bee venom (BV) promotes the survival of dopaminergic (DA) neurons in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) mouse model of Parkinson's disease (PD). Treatment with BV prevented degeneration of DA neurons in the substantia nigra (SN). This neuro-protective effect of BV was associated with microglial deactivation and reduction of CD4 T cell infiltration. Additionally, BV treatment significantly increased the proportion of CD4(+)CD25(+)Foxp3(+) Tregs in vivo and in vitro. The increased proportion of Tregs by BV treatment remained suppressive ex vivo. Interestingly, BV treatment did not prevent MPTP neurotoxicity in mice depleted of Tregs by anti-CD25 antibody injection. Therefore, our present studies suggest that modulation of peripheral immune tolerance by Treg may contribute to the neuroprotective effect of BV in the MPTP model of Parkinson's disease. PMID:22974722

  9. Effect of Bee Venom and Its Fractions on the Release of Pro-Inflammatory Cytokines in PMA-Differentiated U937 Cells Co-Stimulated with LPS.

    Science.gov (United States)

    Tusiimire, Jonans; Wallace, Jennifer; Woods, Nicola; Dufton, Mark J; Parkinson, John A; Abbott, Grainne; Clements, Carol J; Young, Louise; Park, Jin Kyu; Jeon, Jong Woon; Ferro, Valerie A; Watson, David G

    2016-01-01

    The venom of Apis mellifera (honey bee) has been reported to play a role in immunotherapy, but existing evidence to support its immuno-modulatory claims is insufficient. Four fractions from whole bee venom (BV) were separated using medium pressure liquid chromatography. Their ability to induce the production of cytokines TNFα, IL-1β and IL-6 in phorbol-12-myristate-13-acetate (PMA)-treated U937 cells was assessed. The levels of the three cytokines produced by stimulation with the four fractions and crude BV without LPS were not significantly different from negative control values. However, co-stimulation of the cells with LPS and Fraction 4 (F-4) induced a 1.6-fold increase in TNF-α level (p < 0.05) compared to LPS alone. Likewise, LPS-induced IL-1β production was significantly synergised in the presence of F-1 (nine-fold), F-2 (six-fold), F-3 (four-fold) and F-4 (two-fold) fractions, but was only slightly enhanced with crude BV (1.5-fold) relative to LPS. Furthermore, the LPS-stimulated production of IL-6 was not significantly increased in cells co-treated with F-2 and F-3, but the organic fraction (F-4) showed an inhibitory effect (p < 0.05) on IL-6 production. The latter was elucidated by NMR spectroscopy and found to contain(Z)-9-eicosen-1-ol. The effects observed with the purified BV fractions were more marked than those obtained with the crude sample. PMID:27104574

  10. Effect of Bumble Bee Venom in the Treatment of Polycystic Ovary Syndrome, the Relationship Between Tissue Factor Affecting the Level of TNFα in the Wistar Rat Model

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    M Nabiuni

    2013-04-01

    Full Text Available Abstract Background & aim: Polycystic ovary syndrome (PCOS is an endocrine failure leading to anovulation. TNFα is an effective factor in the regulation of normal functioning of the ovaries. High levels of TNFα causes PCOS is further. In this study, the effects of bumble bee venom (HBV on TNFα and other symptoms of ovarian PCOS were studied. Methods: In this experimental study, 60 female Wistar rats were divided into three groups: control, sham and experimental groups. The experimental group was injected with estradiol valerate-induced PCOS direction. Induced rats (PCOS were divided into two groups and treated with HBV. The treatment Group received 0.2mg of HBV for 10 consecutive days. Serum and ovarian tissue was collected from each of the four groups to compare the histological and changes in blood sugar levels. Results: A significant increase in ovarian PCOS weight was observed in the control group , whereas in the treated group with HBV rate fell (15.5 mg Glucose levels in PCOS was 256.5, the control group138, and the treatment group 158. Thickness of the theca layer of antral follicles in the treated group compared with PCOS showed a significant decrease (110 μm and 150 μm respectively. Immunohistochemical results showed increased TNFα factor in PCOS group than in the control group, whereas these levels in samples treated with HBV Reduced. Conclusion: The results of this study revealed that the beneficial effects of HBV in PCOS may be due to the inhibitory effect on factor TNFα. Key words: Polycystic ovary syndrome, Bumble bee venom, Tumor necrosis factor, Immunohistochemistry

  11. Antimicrobial Peptide from the Wild Bee Hylaeus signatus Venom and Its Analogues: Structure-Activity Study and Synergistic Effect with Antibiotics.

    Science.gov (United States)

    Nešuta, Ondřej; Hexnerová, Rozálie; Buděšínský, Miloš; Slaninová, Jiřina; Bednárová, Lucie; Hadravová, Romana; Straka, Jakub; Veverka, Václav; Čeřovský, Václav

    2016-04-22

    Venoms of hymenopteran insects have attracted considerable interest as a source of cationic antimicrobial peptides (AMPs). In the venom of the solitary bee Hylaeus signatus (Hymenoptera: Colletidae), we identified a new hexadecapeptide of sequence Gly-Ile-Met-Ser-Ser-Leu-Met-Lys-Lys-Leu-Ala-Ala-His-Ile-Ala-Lys-NH2. Named HYL, it belongs to the category of α-helical amphipathic AMPs. HYL exhibited weak antimicrobial activity against several strains of pathogenic bacteria and moderate activity against Candida albicans, but its hemolytic activity against human red blood cells was low. We prepared a set of HYL analogues to evaluate the effects of structural modifications on its biological activity and to increase its potency against pathogenic bacteria. This produced several analogues exhibiting significantly greater activity compared to HYL against strains of both Staphylococcus aureus and Pseudomonas aeruginosa even as their hemolytic activity remained low. Studying synergism of HYL peptides and conventional antibiotics showed the peptides act synergistically and preferentially in combination with rifampicin. Fluorescent dye propidium iodide uptake showed the tested peptides were able to facilitate entrance of antibiotics into the cytoplasm by permeabilization of the outer and inner bacterial cell membrane of P. aeruginosa. Transmission electron microscopy revealed that treatment of P. aeruginosa with one of the HYL analogues caused total disintegration of bacterial cells. NMR spectroscopy was used to elucidate the structure-activity relationship for the effect of amino acid residue substitution in HYL. PMID:26998557

  12. Progress in physiological actions of bee venom and it's components-noeieeption or antinociception%蜂毒及其组成成分的生理作用机制及进展一致痛或镇痛

    Institute of Scientific and Technical Information of China (English)

    柳涛; 藤田亚美; 熊本荣一

    2009-01-01

    @@ 蜂疗(apitherapy或bee therapy)的确切起源不明,但可以追溯到数千年前的古埃及,希腊和中国,在印度的吠陀经,圣经和古兰经中均有蜂产品包括蜂蜜、花粉、蜂胶、蜂王浆和蜂毒(bee venom,BV)应用的记载.在这些记载中,主要记录的是蜂产品的营养成分而不是蜂毒.

  13. Effect of Apis mellifera bee venom and gamma radiation on bone marrow cells of wistar rats treated in vivo

    International Nuclear Information System (INIS)

    To determine whether the venom of Apis mellifera can exert a radioprotective effect, by reducing the frequency of chromosomal aberrations induced by radiation, five different experiments were performed on bone marrow cells of Wistar rats. Animals weighing about 100 g were injected intraperitoneally with different venom concentrations (1.0 or 0.5 μ1) 1 or 24 h before, or 30 min after being submitted to three or four Gy of gamma radiation, and sacrificed 24 h after the last treatment. (author)

  14. Toxicity study of antimicrobial peptides from wild bee venom and their analogs toward mammalian normal and cancer cells

    Czech Academy of Sciences Publication Activity Database

    Slaninová, Jiřina; Mlsová, V.; Kroupová, H.; Alán, Lukáš; Tůmová, Tereza; Monincová, Lenka; Borovičková, Lenka; Fučík, Vladimír; Čeřovský, Václav

    2012-01-01

    Roč. 33, č. 1 (2012), s. 18-26. ISSN 0196-9781 R&D Projects: GA ČR GA203/08/0536 Institutional research plan: CEZ:AV0Z40550506; CEZ:AV0Z50110509 Keywords : antimicrobial peptides * venom * hymenoptera * cancer cells * toxicity * confocal microscopy Subject RIV: CE - Biochemistry Impact factor: 2.522, year: 2012

  15. Prevention of Muscle Necrosis Induced in Rats after Envenomation of Trimeresurus flavoviridis (Amami-Oshima Island) Venom and Its Components, Phospholipase A_2 Isozymes

    OpenAIRE

    KITANO, Motoo; YOSHIDA, Aichi; HATTORI, Shosaku; OHNO, Motonori

    2003-01-01

    The lesions caused by sublethal doses of Trimeresurus flavoviridis (Tf) venom injected into the anterior thigh muscle (quadriceps femoris muscle; QFM) of rats were studied using paraffin sections. A dose of 50 f*g of Tf venom produced a large area of necrosis in the QFM together with the neighboring muscles. Phagocytosis of necrotic remnants was followed by marked regeneration of muscle fibers. Myonecrosis was microscopically evident 30 minutes after injection, and over the following 72 hours...

  16. Isolation of Melittin from Iranian Honey Bee Venom and Investigation of Its Effect on Proliferation of Cervical Cancer- HeLa Cell Line

    Directory of Open Access Journals (Sweden)

    K Pooshang Bagheri

    2013-06-01

    Full Text Available Introduction: Cervical cancer is the second prevalent cancer in developing countries and the sixth prevalent cancer in USA. Since conventional treatment methods are associated with detrimental side effects, searching for new drugs using natural ingredients is very important. Previous studies have shown that melittin (main component of honey bee venom has anticancer properties along with the effect on cell membrane and activation of apoptosis. In this study, inhibitory effects of melittin on the viability and proliferation of cervical cancer cell line (HeLa was investigated. Methods: Melittin was purified from honeybee venom using reversed-phase HPLC method. Then, biological activity of melittin was examined by hemolytic activity analysis on the red blood cells. In order to investigate whether melittin inhibits proliferation of HeLa cell, MTT assay was performed. HeLa cells were plated in a 96-well plate and treated with serially diluted concentrations of melittin for 12 and 24 hours. The viability of the cells was measured via MTT assay at 540nm. Results: Melittin showed a strong hemolytic activity (HD50=0.5 µg/ml which can be reduced by FBS(HD50=2 µg/ml. Results of MTT assay indicated that melittin shows cytotoxic effect on cervical cancer cells with IC50 = 1.2 ug/ml at 12h incubation period. Conclusion: In this study, biological activity of melittin and inhibitory effect of FBS on hemolysis were determined via hemolytic activity analysis. MTT assay indicated that melittin induced cytotoxic effects in a dose dependent manner on cervical cancer cells and it also revealed dependence on incubation time as well.

  17. [Poisoning by bee sting].

    Science.gov (United States)

    de Roodt, Adolfo R; Salomón, Oscar D; Orduna, Tomás A; Robles Ortiz, Luis E; Paniagua Solís, Jorge F; Alagón Cano, Alejandro

    2005-01-01

    Among the human pathologies produced by venomous animals, bee stings constitute the largest number of accidents in several countries, exceeding the mortality rate caused by other venomous animals such as snakes, spiders or scorpions. The clinical picture after the bee sting may include anaphylaxis or poisoning. The latter is produced by massive attacks and is a serious problem that may put the patient's life at risk. People that are poisoned display hemolysis, rhabdomiolysis and acute renal failure that together with other systemic failures can bring about death. The knowledge of the physiopathological mechanisms involved in the massive attack of bees is crucial for health care professionals as to date we do not have antivenoms with proven clinical efficacy. In this review we include the bee's biological aspects, venom composition and its relation with the occurrence and severity of accidents as well as epidemiological data that can be useful for this type of accidents. PMID:16025987

  18. Genetically Engineered Yeast Expressing a Lytic Peptide from Bee Venom (Melittin Kills Symbiotic Protozoa in the Gut of Formosan Subterranean Termites.

    Directory of Open Access Journals (Sweden)

    Claudia Husseneder

    Full Text Available The Formosan subterranean termite, Coptotermes formosanus Shiraki, is a costly invasive urban pest in warm and humid regions around the world. Feeding workers of the Formosan subterranean termite genetically engineered yeast strains that express synthetic protozoacidal lytic peptides has been shown to kill the cellulose digesting termite gut protozoa, which results in death of the termite colony. In this study, we tested if Melittin, a natural lytic peptide from bee venom, could be delivered into the termite gut via genetically engineered yeast and if the expressed Melittin killed termites via lysis of symbiotic protozoa in the gut of termite workers and/or destruction of the gut tissue itself. Melittin expressing yeast did kill protozoa in the termite gut within 56 days of exposure. The expressed Melittin weakened the gut but did not add a synergistic effect to the protozoacidal action by gut necrosis. While Melittin could be applied for termite control via killing the cellulose-digesting protozoa in the termite gut, it is unlikely to be useful as a standalone product to control insects that do not rely on symbiotic protozoa for survival.

  19. Clinical Analysis about Treatment of Myofascial Pain Syndrome(MPS with Sweet Bee Venom on Hand Paresthesia based on Thoracic Outlet Syndrome

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    Sung-Won Oh

    2010-06-01

    Full Text Available Objectives: The objective of this study was to compare the effects of Sweet Bee Venom(Sweet BV Therapy between the hand paresthesia patients with Osteoporosis and without Osteoporosis. Methods: This study was carried out to established the clinical criteria of hand parethesia. The patients who had past history of diabeics, neuropathy induced by alcohol or drug and was positive on Myofacial Pain Syndrome Theory were excluded. 32 patients who had hand paresthesia related with unknown-reason was selected by the interview process. And the effects of treatment were analyzed using VAS score before treatment, after treatment, after 1 month and after 3 months. Results and conclusion: After treatment, While Osteoporosis group decrease from 64.81±17.81 to 27.21±17.32, Non-Osteoporosis group decrease from 58.76±11.43 to 24.74±13.81 by VAS scores. and After 3 months, While Osteoporosis group increase from 27.21±17.32 to 54.96±19.40, Non-Osteoporosis group increase from 24.74±13.81 to 32.43±15.57. Non-Osteoporosis group was accordingly more effective than Osteoporosis group after 3 months. So Sweet BV therapy for hand numbness patients without Osteoporosis was effective than patients with Osteoporosis.

  20. Cancer Cell Growth Inhibitory Effect of Bee Venom via Increase of Death Receptor 3 Expression and Inactivation of NF-kappa B in NSCLC Cells

    Directory of Open Access Journals (Sweden)

    Kyung Eun Choi

    2014-07-01

    Full Text Available Our previous findings have demonstrated that bee venom (BV has anti-cancer activity in several cancer cells. However, the effects of BV on lung cancer cell growth have not been reported. Cell viability was determined with trypan blue uptake, soft agar formation as well as DAPI and TUNEL assay. Cell death related protein expression was determined with Western blotting. An EMSA was used for nuclear factor kappaB (NF-κB activity assay. BV (1–5 μg/mL inhibited growth of lung cancer cells by induction of apoptosis in a dose dependent manner in lung cancer cell lines A549 and NCI-H460. Consistent with apoptotic cell death, expression of DR3 and DR6 was significantly increased. However, deletion of DRs by small interfering RNA significantly reversed BV induced cell growth inhibitory effects. Expression of pro-apoptotic proteins (caspase-3 and Bax was concomitantly increased, but the NF-κB activity and expression of Bcl-2 were inhibited. A combination treatment of tumor necrosis factor (TNF-like weak inducer of apoptosis, TNF-related apoptosis-inducing ligand, docetaxel and cisplatin, with BV synergistically inhibited both A549 and NCI-H460 lung cancer cell growth with further down regulation of NF-κB activity. These results show that BV induces apoptotic cell death in lung cancer cells through the enhancement of DR3 expression and inhibition of NF-κB pathway.

  1. Genetically Engineered Yeast Expressing a Lytic Peptide from Bee Venom (Melittin) Kills Symbiotic Protozoa in the Gut of Formosan Subterranean Termites.

    Science.gov (United States)

    Husseneder, Claudia; Donaldson, Jennifer R; Foil, Lane D

    2016-01-01

    The Formosan subterranean termite, Coptotermes formosanus Shiraki, is a costly invasive urban pest in warm and humid regions around the world. Feeding workers of the Formosan subterranean termite genetically engineered yeast strains that express synthetic protozoacidal lytic peptides has been shown to kill the cellulose digesting termite gut protozoa, which results in death of the termite colony. In this study, we tested if Melittin, a natural lytic peptide from bee venom, could be delivered into the termite gut via genetically engineered yeast and if the expressed Melittin killed termites via lysis of symbiotic protozoa in the gut of termite workers and/or destruction of the gut tissue itself. Melittin expressing yeast did kill protozoa in the termite gut within 56 days of exposure. The expressed Melittin weakened the gut but did not add a synergistic effect to the protozoacidal action by gut necrosis. While Melittin could be applied for termite control via killing the cellulose-digesting protozoa in the termite gut, it is unlikely to be useful as a standalone product to control insects that do not rely on symbiotic protozoa for survival. PMID:26985663

  2. Blockade of Adrenal Medulla-Derived Epinephrine Potentiates Bee Venom-Induced Antinociception in the Mouse Formalin Test: Involvement of Peripheral β-Adrenoceptors

    Directory of Open Access Journals (Sweden)

    Suk-Yun Kang

    2013-01-01

    Full Text Available The injection of diluted bee venom (DBV into an acupoint has been used traditionally in eastern medicine to treat a variety of inflammatory chronic pain conditions. We have previously shown that DBV had a potent antinociceptive efficacy in several rodent pain models. However, the peripheral mechanisms underlying DBV-induced antinociception remain unclear. The present study was designed to investigate the role of peripheral epinephrine on the DBV-induced antinociceptive effect in the mouse formalin assay. Adrenalectomy significantly enhanced the antinociceptive effect of DBV during the late phase of the formalin test, while chemical sympathectomy had no effect. Intraperitoneal injection of epinephrine blocked this adrenalectomy-induced enhancement of the DBV-induced antinociceptive effect. Moreover, injection of a phenylethanolamine N-methyltransferase (PNMT inhibitor enhanced the DBV-induced antinociceptive effect. Administration of nonselective β-adrenergic antagonists also significantly potentiated this DBV-induced antinociception, in a manner similar to adrenalectomy. These results demonstrate that the antinociceptive effect of DBV treatment can be significantly enhanced by modulation of adrenal medulla-derived epinephrine and this effect is mediated by peripheral β-adrenoceptors. Thus, DBV acupoint stimulation in combination with inhibition of peripheral β-adrenoceptors could be a potentially novel strategy for the management of inflammatory pain.

  3. The Effects of Bee Venom Acupuncture on the Central Nervous System and Muscle in an Animal hSOD1G93A Mutant

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    MuDan Cai

    2015-03-01

    Full Text Available Amyotrophic lateral sclerosis (ALS is caused by the degeneration of lower and upper motor neurons, leading to muscle paralysis and respiratory failure. However, there is no effective drug or therapy to treat ALS. Complementary and alternative medicine (CAM, including acupuncture, pharmacopuncture, herbal medicine, and massage is popular due to the significant limitations of conventional therapy. Bee venom acupuncture (BVA, also known as one of pharmacopunctures, has been used in Oriental medicine to treat inflammatory diseases. The purpose of this study is to investigate the effect of BVA on the central nervous system (CNS and muscle in symptomatic hSOD1G93A transgenic mice, an animal model of ALS. Our findings show that BVA at ST36 enhanced motor function and decreased motor neuron death in the spinal cord compared to that observed in hSOD1G93A transgenic mice injected intraperitoneally (i.p. with BV. Furthermore, BV treatment at ST36 eliminated signaling downstream of inflammatory proteins such as TLR4 in the spinal cords of symptomatic hSOD1G93A transgenic mice. However, i.p. treatment with BV reduced the levels of TNF-α and Bcl-2 expression in the muscle hSOD1G93A transgenic mice. Taken together, our findings suggest that BV pharmacopuncture into certain acupoints may act as a chemical stimulant to activate those acupoints and subsequently engage the endogenous immune modulatory system in the CNS in an animal model of ALS.

  4. A Clinical Pilot Study Comparing Sweet Bee Venom parallel treatment with only Acupuncture Treatment in patient diagnosed with lumbar spine sprain

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    Shin Yong-jeen

    2011-06-01

    Full Text Available Objectives: This study was carried out to compare the Sweet Bee Venom (referred to as Sweet BV hereafter acupuncture parallel treatment to treatment with acupuncture only for the patient diagnosed with lumbar spine sprain and find a better treatment. Methods: The subjects were patients diagnosed with lumbar spine sprain and hospitalized at Suncheon oriental medical hospital, which was randomly divided into sweet BV parallel treatment group and acupuncture-only group, and other treatment conditions were maintained the same. Then,VAS (Visual Analogue Scale was used to compare the difference in the treatment period between the two groups from VAS 10 to VAS 0, from VAS 10 to VAS 5, and from VAS 5 to VAS 0. Result & Conclusion: Sweet BV parallel treatment group and acupuncture-only treatment group were compared regarding the respective treatment period, and as the result, the treatment period from VAS 10 to VAS 5 was significantly reduced in sweet BV parallel treatment group compared to the acupuncture-only treatment group, but the treatment period from VAS 5 to VAS 0 did not show a significant difference. Therefore, it can be said that sweet BV parallel treatment is effective in shortening the treatment period and controlling early pain compared to acupuncture-only treatment.

  5. Neuroprotective effect of bee venom is mediated by reduced astrocyte activation in a subchronic MPTP-induced model of Parkinson's disease.

    Science.gov (United States)

    Kim, Mi Eun; Lee, Joo Yeon; Lee, Kyung Moon; Park, Hee Ra; Lee, Eunjin; Lee, Yujeong; Lee, Jun Sik; Lee, Jaewon

    2016-08-01

    Bee venom (BV), also known as apitoxin, is widely used in traditional oriental medicine to treat immune-related diseases. Recent studies suggest that BV could be beneficial for the treatment of neurodegenerative diseases. Parkinson's disease (PD) is the second most common neurodegenerative disease next to Alzheimer's disease, and PD pathologies are closely associated with neuroinflammation. Previous studies have suggested the neuroprotective effects of BV in animal models of PD are due to the modulation of inflammation. However, the molecular mechanisms responsible for the anti-neuroinflammatory effect of BV have not been elucidated in astrocytes. Here, the authors investigated the neuroprotective effects of BV and pramipexole (PPX; a positive control) in a subchronic MPTP-induced murine PD model. Both BV and PPX prevented MPTP-induced impairments in motor performance and reduced dopaminergic neuron loss, and furthermore, these neuroprotective effects of BV and PPX were found to be associated with reduced astroglial activation in vivo PD model. However, in MPP(+) treated primary cultured astrocytes, BV modulated astrocyte activation, whereas PPX did not, indicating that the neuroprotective effects of PPX were not mediated by neuroinflammation. These findings suggest that BV should be considered a potential therapeutic or preventive agent for PD and other neuroinflammatory associated disorders. PMID:27469335

  6. Effect of bee venom peptide on the proliferation of bladder cancer cells T24%蜂毒多肽对人膀胱癌 T24细胞增殖的抑制作用

    Institute of Scientific and Technical Information of China (English)

    王强; 刘艳如; 陈宇东; 史建国; 刘同伟; 李春吾; 苑海波

    2014-01-01

    Objective To investigate the effect of bee venom peptide on the proliferation and cell cycle of bladder cancer . Methods 0.1,1.0,10.0,100.0 μg/ml concentrations of bee venom peptide were used to act on the cultivated bladder cancers T 24. The propagation supressing measuring method with methyl thiazol tetrazolium (MTT)was applied.Flow cytometry was used to assess the effects of bee venom peptide on the expression of proliferating cell nuclear antigen (PCNA)and cell cycle of T24 bladder cancer cells. Results Bee venom peptide could inhibit proliferation of T 24 bladder cancer cells in vitro and inhibit the expression of proliferating cell nuclear antigen dose-dependently( P <0.05 or P <0.01).Bee venom peptide could interfere with cell cycle of T 24 bladder canc-er cells, decrease G2/M phase cells and increase S phase cells .During interference cell cycle , G0/G1 of each group was lower than that of the control group( P <0.05 or P <0.01),but S phase cells were higher than that of the control group ( P <0.05 or P <0.01), G2M phase of 10μg/ml and 100μg /ml group was higher than that of the control group ( P <0.01).Conlc usoi n Bee venom peptide can inhibite proliferation of T 24 bladder cancer cells .The mechanism may be related to inhibition of PCNA expression and interference with cell cycle .%目的:探讨蜂毒多肽对人膀胱癌T24细胞的增殖及细胞周期的影响。方法以浓度为0.1、1.0、10.0、100.0μg/ml的蜂毒多肽作用于体外培养的人膀胱癌T24细胞,应用四甲基偶氮唑盐( MTT)的培养增殖抑制作用,用流式细胞仪检测蜂毒多肽对细胞增殖核抗原( PCNA)表达及对该细胞周期的影响。结果蜂毒多肽能够在体外抑制人膀胱癌T24细胞的增殖活性;抑制PCNA的表达,呈剂量依赖性,各浓度组PCNA量均较对照组降低( P <0.05或P <0.01);干扰细胞周期,各浓度组G0/G1期均低于对照组( P <0.05或P <0.01

  7. Clinical Features of 44 Cases of Honey Bee Venom Allergy%44例蜜蜂蜂毒过敏的临床特点

    Institute of Scientific and Technical Information of China (English)

    关凯; 孔瑞; 尹佳

    2013-01-01

    Objective To investigate the clinical characteristics of honey bee venom allergy. Methods Clinical data were collected and summarized from patients who were diagnosed as honeybee venom allergy or other allergic diseases without relevant clinical history of honeybee venom sting reaction but whose honeybee venom (il) sIgE results were positive from Department of Allergy, PUMC hospital since June 2002 to February 2012. Based on honeybee sting reactions, patients were divided into three groups: local reactions, large local reactions and systemic reactions. Habitual residence and exposure types of the patients were analyzed. The sIgE/T-IgE was compared between allergy and control group. Results 44 patients were enrolled into allergy group, male versus female was 31: 13 ; average age was 37 (between 29 and 48 years old). 48% (21/44) of them lived in urban areas and 52% (23/44) lived in the rural areas. 30/44 of the cases were suffering from local reactions, 6/44 of the cases from large local reactions and 8/44 of the cases from systemic reactions. 1/8 of the case was graded as type Ⅱ and 7 /8 of the cases as type Ⅲ in systemic reaction group. The differences were statistically significant (P = 0.0085) among three groups on exposure types. 50% (4/8) of patients were beekeepers in systemic reaction group. There is statistically significant difference (P=0.001) among allergy and control groups on sIgE/T-IgE. The differences were statistically significant between systemic reaction and control group on slgE/T-IgE [ 3. 51% ( 1. 19% , 8. 84% ) vs. 0.16% (0.09%, 0.49%), P = 0.001]. One patient in systemic reaction group was suffering from local months later. Conclusions Occupational exposure was the most common cause of honeybee venom systemic reaction. slgE/T-IgE could be a helpful tool for the diagnosis of honeybee venom allergy.%目的 探讨蜜蜂蜂毒过敏的临床特点.方法 回顾2002年6月至2012年2月到北京协和医院就诊并确诊的蜜蜂蜂毒过敏

  8. Inhibitory effects of microinjection of morphine into thalamic nucleus submedius on ipsilateral paw bee venom-induced inflammatory pain in the rat

    Institute of Scientific and Technical Information of China (English)

    Jie Feng; Ning Jia; Jun-yang Wang; Xin-ai Song; Xiao-ying Li; Jing-shi Tang

    2009-01-01

    Objective To examine whether microinjectlon of morphine into the rat thaiamle nucleus submedlus (Sin) could depress the bee venom (BV)-induced nociceptive behaviours. Methods In inflammatory pain model induced by BV subcutaneous injection into rat unilateral hind paw, the inhibitory effects of morphine microinjection into thalamic nucleus suhmedius (Sin) on the spontaneous nociecptlve behavior, heat hyperalgesia and tactile ailodynia, and the influence of naioxone on the morphine effects were observed in the rat. Results A single dose of morphine (5.0 μg, 0. 5μL) applied into the Sm ipsilaterni to the BV injected paw significantly depressed the spontaneous paw flinching response. Morphine also significantly increased the heat paw withdrawal iateneies in the bilateral hind paw and the tactile paw withdrawal threshold in the ipsilnteral hind paw 2 hours after BV injection. All these depressive effects could be effectively antagonized by pre-treatment with the opiuld receptor antagonist naloxone (1.0μg, 0. 5μL) in the Sm 5rain prior to morphine administration. Naloxone alone injected to the Sm had no effect on the BV-induecd nociceptive behavior. Conclusion These results suggest that Sm is involved in opioid receptor-mediated antt-nociception in the rat with the BV-induced inflammatory pain. Together with results from previous studies, it is likely that this effect is produced by activation of the Sm-ventrolateral orbital cortex-periaqueductal gray pathway, leading to activation of the brainstem descending inhibitory system and depression of the nodceptive inputs at the spinal cord level.

  9. Study on a 4-Week Recovery Test of Sweet Bee Venom after a 13-Week, Repeated, Intramuscular Dose Toxicity Test in Sprague-Dawley Rats

    Directory of Open Access Journals (Sweden)

    Chungsan Lim

    2014-06-01

    Full Text Available Objectives:This study was performed to check for reversibility in the changes induced by a 13-week, repeated, dose toxicity test of Sweet Bee Venom (SBV in Sprague-Dawley (SD rats. Methods:Fifteen male and 15 female SD rats were treated with 0.28 mg/kg of SBV (high-dosage group and the same numbers of male and female SD rats were treated with 0.2 mL/kg of normal saline (control group for 13 weeks. We selected five male and five female SD rats from the high-dosage group and the same numbers of male and female SD rats from the control group, and we observed these rats for four weeks. We conducted body-weight measurements, ophthalmic examinations, urinalyses and hematology, biochemistry, histology tests. Results:(1 Hyperemia and movement disorder were observed in the 13-week, repeated, dose toxicity test, but these symptoms were not observed during the recovery period. (2 The rats in the high-dose group showed no significant changes in weight compared to the control group. (3 No significant differences in the ophthalmic parameters, urine analyses, complete blood cell counts (CBCs, and biochemistry were observed among the recovery groups. (4 No changes in organ weights were observed during the recovery period. (5 Histological examination of the thigh muscle indicated cell infiltration, inflammation, degeneration, necrosis of muscle fiber, and fibrosis during the treatment period, but these changes were not observed during the recovery period. The fatty liver change that was observed during the toxicity test was not observed during the recovery period. No other organ abnormalities were observed. Conclusion:The changes that occurred during the 13-week, repeated, dose toxicity test are reversible, and SBV can be safely used as a treatment modality.

  10. The assessment of bee venom responses in an experimental model of mono-arthritis using Tc-99m DPD bone scintigraphy

    International Nuclear Information System (INIS)

    Several recent studies have shown that bee venom (BV) has an anti-nociceptive and anti-inflammatory effect on arthritis. However, objective methods for evaluation of the therapeutic effect of BV is insufficient in animal studies and clinical trials. Our purpose was to determine the usefulness of bone scintigraphy using Tc-99m DPD (3,3-diphosphono-1,2-propan-dicarbonacid) about effects of BV applied to carrageenan-induced mono-arthritis (CIA) model. Mono-arthritis was induced by an intra-articular injection of carrageenan in Sprague-Dawley rats. Administration of BV (0.8 mg/kg) was performed at 30 min before and at 4 h after the induction of mono-arthritis. We assigned rats to BV-before, BV-after, control-before and control-after groups and compared the results of each group by the weight-loading test and bone scintigraphy. The rats received an intravenous injection of 37 MBq of Tc-99m DPD by the tail vein and then scanning was performed at 4 and 24 h after the injection. Visual assessment and quantitative analysis were performed for both knees. The BV-before and BV-after groups were more improved than the control groups on the weight load test (p<0.05). Bone scintigraphy showed lower activity in the BV-before group than in the control-before group (p<0.05) on the 4 h imaging. However, a significant difference in the BV-before and BV-after groups was not observed on the 24 h imaging. BV had therapeutic effects by anti-nociceptive and anti-inflammatory activity in the CIA and bone scintigraphy performed on 4 h imaging provided visual and quantitative information for the assessment of the therapeutic response to BV as an objective method in mono arthritis model. (author)

  11. Differential activation of p38 and extracellular signal-regulated kinase in spinal cord in a model of bee venom-induced inflammation and hyperalgesia

    Directory of Open Access Journals (Sweden)

    Kobayashi Kimiko

    2008-04-01

    Full Text Available Abstract Background Honeybee's sting on human skin can induce ongoing pain, hyperalgesia and inflammation. Injection of bee venom (BV into the intraplantar surface of the rat hindpaw induces an early onset of spontaneous pain followed by a lasting thermal and mechanical hypersensitivity in the affected paw. The underlying mechanisms of BV-induced thermal and mechanical hypersensitivity are, however, poorly understood. In the present study, we investigated the role of mitogen-activated protein kinase (MAPK in the generation of BV-induced pain hypersensitivity. Results We found that BV injection resulted in a quick activation of p38, predominantly in the L4/L5 spinal dorsal horn ipsilateral to the inflammation from 1 hr to 7 d post-injection. Phosphorylated p38 (p-p38 was expressed in both neurons and microglia, but not in astrocytes. Intrathecal administration of the p38 inhibitor, SB203580, prevented BV-induced thermal hypersensitivity from 1 hr to 3 d, but had no effect on mechanical hypersensitivity. Activated ERK1/2 was observed exclusively in neurons in the L4/L5 dorsal horn from 2 min to 1 d, peaking at 2 min after BV injection. Intrathecal administration of the MEK inhibitor, U0126, prevented both mechanical and thermal hypersensitivity from 1 hr to 2 d. p-ERK1/2 and p-p38 were expressed in neurons in distinct regions of the L4/L5 dorsal horn; p-ERK1/2 was mainly in lamina I, while p-p38 was mainly in lamina II of the dorsal horn. Conclusion The results indicate that differential activation of p38 and ERK1/2 in the dorsal horn may contribute to the generation and development of BV-induced pain hypersensitivity by different mechanisms.

  12. An Asp49 Phospholipase A2 from Snake Venom Induces Cyclooxygenase-2 Expression and Prostaglandin E2 Production via Activation of NF-κB, p38MAPK, and PKC in Macrophages

    Directory of Open Access Journals (Sweden)

    Vanessa Moreira

    2014-01-01

    Full Text Available Phospholipases A2 (PLA2 are key enzymes for production of lipid mediators. We previously demonstrated that a snake venom sPLA2 named MT-III leads to prostaglandin (PGE2 biosynthesis in macrophages by inducing the expression of cyclooxygenase-2 (COX-2. Herein, we explored the molecular mechanisms and signaling pathways leading to these MT-III-induced effects. Results demonstrated that MT-III induced activation of the transcription factor NF-κB in isolated macrophages. By using NF-κB selective inhibitors, the involvement of this factor in MT-III-induced COX-2 expression and PGE2 production was demonstrated. Moreover, MT-III-induced COX-2 protein expression and PGE2 release were attenuated by pretreatment of macrophages with SB202190, and Ly294002, and H-7-dihydro compounds, indicating the involvement of p38MAPK, PI3K, and PKC pathways, respectively. Consistent with this, MT-III triggered early phosphorylation of p38MAPK, PI3K, and PKC. Furthermore, SB202190, H-7-dihydro, but not Ly294002 treatment, abrogated activation of NF-κB induced by MT-III. Altogether, these results show for the first time that the induction of COX-2 protein expression and PGE2 release, which occur via NF-κB activation induced by the sPLA2-MT-III in macrophages, are modulated by p38MAPK and PKC, but not by PI3K signaling proteins.

  13. Modulation of the Activity of Secretory Phospholipase A2 by Antimicrobial Peptides

    Science.gov (United States)

    Zhao, Hongxia; Kinnunen, Paavo K. J.

    2003-01-01

    The antimicrobial peptides magainin 2, indolicidin, and temporins B and L were found to modulate the hydrolytic activity of secretory phospholipase A2 (sPLA2) from bee venom and in human lacrimal fluid. More specifically, hydrolysis of phosphatidylcholine (PC) liposomes by bee venom sPLA2 at 10 μM Ca2+ was attenuated by these peptides while augmented product formation was observed in the presence of 5 mM Ca2+. The activity of sPLA2 towards anionic liposomes was significantly enhanced by the antimicrobial peptides at low [Ca2+] and was further enhanced in the presence of 5 mM Ca2+. Similarly, with 5 mM Ca2+ the hydrolysis of anionic liposomes was enhanced significantly by human lacrimal fluid sPLA2, while that of PC liposomes was attenuated. These results indicate that concerted action of antimicrobial peptides and sPLA2 could improve the efficiency of the innate response to infections. Interestingly, inclusion of a cationic gemini surfactant in the vesicles showed an essentially similar pattern on sPLA2 activity, suggesting that the modulation of the enzyme activity by the antimicrobial peptides may involve also charge properties of the substrate surface. PMID:12604528

  14. Characterization of the N-glycans of recombinant bee venom hyaluronidase (Api m 2) expressed in insect cells.

    Science.gov (United States)

    Soldatova, Lyudmila N; Tsai, Chaoming; Dobrovolskaia, Ekaterina; Marković-Housley, Zora; Slater, Jay E

    2007-01-01

    Honeybee venom hyaluronidase (Api m 2) is a major glycoprotein allergen. Previous studies have indicated that recombinant Api m 2 expressed in insect cells has enzyme activity and IgE binding comparable with that of native Api m 2. In contrast, Api m 2 expressed in Escherichia coli does not. In this study, we characterized the carbohydrate side chains of Api m 2 expressed in insect cells, and compared our data with the established carbohydrate structure of native Api m 2. We assessed both the monosaccharide and the oligosaccharide content of recombinant Api m 2 using fluorophore-assisted carbohydrate electrophoresis and HPLC. To identify the amino acid residues at which glycosylation occurs, we digested recombinant Api m 2 with endoproteinase Glu-C and identified the fragments that contained carbohydrate by specific staining. Recombinant Api m 2 expressed in insect cells contains N-acetylglucosamine, mannose, and fucose, as well as trace amounts of glucose and galactose, and the oligosaccharide analysis is consistent with heterogeneous oligosaccharide chains consisting of two to seven monosaccharides. No sialic acid or N-acetylgalactosamine were detected. These results are similar to published data for native Api m 2, although some monosaccharide components appear to be absent in the recombinant protein. Analysis of proteolytic digests indicates that of the four candidate N-glycosylation sites, carbohydrate chains are attached at asparagines 115 and 263. Recombinant Api m 2 expressed in insect cells has enzymic activity and IgE binding comparable with the native protein, and its carbohydrate composition is very similar. PMID:17479607

  15. Proteinaceous inhibitors of phospholipase A2 purified from inflammatory sites in rats.

    OpenAIRE

    Suwa, Y; Kudo, I; Imaizumi, A; Okada, M; Kamimura, T.; Suzuki, Y.; Chang, H. W.; HARA, S.; Inoue, K.

    1990-01-01

    We have purified two phospholipase A2 inhibitory proteins (37 and 33 kDa) from peritoneal fluid of dexamethasone-treated rats. The extracellular phospholipase A2 found in inflammatory sites differed from the exocrine phospholipase A2 in susceptibility to these endogenous inhibitors; both proteins inhibited the activity of the extracellular phospholipase A2 purified from sites of inflammation but did not affect appreciably the activity of either porcine pancreatic or Naja naja venom phospholip...

  16. 血浆置换术抢救25例蜂毒致急性重度溶血性贫血临床观察%The clinical abservation of TPE rescue acute severe hemolysis caused by bee venom

    Institute of Scientific and Technical Information of China (English)

    陈劲松; 吴华新; 范萍

    2009-01-01

    目的:观察血浆置换术(TPE)治疗蜂毒致急性重度溶血性贫血的疗效.方法:对25例已被确诊为蜂毒致急性重度溶血性贫血患者,在应用糖皮质激素的基础上进行TPE治疗,并观察其治疗效果.结果:25例患者中,22例患者经1~2次TPE治疗后,中毒症状很快缓解,血氧饱和度上升到90%~99%,溶血基本控制,血红蛋白尿、高胆红素血症消失,降低了多脏器功能衰竭的发生率,有效率为88%,平均住院12.5 d.结论:TPE能快速有效地清除蜂毒及红细胞溶解产物,可阻断因溶血及蜂毒导致的脏器功能衰竭,是抢救蜂毒危重者的有效方法.%Objective:To observe the effect of the rapeutic plasma exchange in acute severe hemolysis which was caused by bee venom.Methods:25 patients were made a definite diagnosis to acute severe hemolysis which was caused by bee venom.Corticosteroid and plasma exchange were given to them.Results:Among 25 patients,22 patients who have undergone 1 to 2 times TPE.During the operation and end of TPE, the symptom of toxicosis remitted at once.The SaO2 rised to 90%- 99%.Hospitalization time was 12.5 days,hemolysis were controlled,hemoglobinnria and hyperbilirubinemia disappeared, the incidence of organ function failure decreased,effective rate was 88%.Conclusion:Plasma exchange can quickly remove the apitoxin and product of crythrolysis,TPE can bolck the organ function failure caused by hemolysis and apitoxin and is an effective method for rescue severe patients by bee venom.

  17. Asp-49 is not an absolute prerequisite for the enzymic activity of low-M(r) phospholipases A2: purification, characterization and computer modelling of an enzymically active Ser-49 phospholipase A2, ecarpholin S, from the venom of Echis carinatus sochureki (saw-scaled viper).

    Science.gov (United States)

    Polgár, J; Magnenat, E M; Peitsch, M C; Wells, T N; Clemetson, K J

    1996-11-01

    Several studies have shown that Asp-49 is the residue that controls calcium binding in, and so plays a critical role in the calcium-mediated activation of, low-M(r) group I-III phospholipases A2 (PLA2s). The present paper provides experimental evidence that Asp-49 is not an absolute prerequisite for the enzymic activity of PLA2s, and that proteins with amino acid(s) other than Asp at position 49 can exhibit significant phospholipase activity. The purification, complete amino acid sequence and characterization of ecarpholin S, a PLA2 from Echis carinatus sochureki (saw-scaled viper) venom, is described. This single-chain, 122-amino-acid, basic (pI 7.9) protein is a group II PLA2. Although Asp-49 is replaced by Ser and Tyr-28 by Phe (both of these positions being involved in the Ca(2+)-binding site of PLA2s), the lipolysis of soybean phosphatidylcholine and egg yolk in the presence of 10 mM CaCl2 was 1.5 times and 2.9 times greater respectively with ecarpholin S than with recombinant human group II PLA2. The Ca(2+)-dependencies of the enzymic activities of ecarpholin S and rPLA2 were found to be similar. Ecarpholin S added to washed platelets induced aggregation; the presence of Ca2+ was a prerequisite for this platelet-aggregating effect. Computer modelling of the Ca(2+)-binding site of Ser-49 PLA2 compared with the Asp-49 and Lys-49 forms, for which crystallographic data exist, shows that the Ca(2+)-binding site is sterically blocked by Lys-49 but not by Ser-49; in the latter, the Ser hydroxy group may replace the Asp carboxylate in stabilization of Ca2+ binding. Sequence comparisons of ecarpholin S and other low-M(r) PLA2s predicts the presence of a Ser-49 group in the protein family of low-M(r) PLA2s that is distinct from the Asp-49 and Lys-49 groups. PMID:8921006

  18. Venomous Spiders

    Science.gov (United States)

    ... and Scorpions Poisonous Plants Venomous Spiders Venomous Snakes Vector-Borne Diseases Mosquito-Borne Diseases Tick-Borne Diseases Lyme Disease ... and Scorpions Poisonous Plants Venomous Spiders Venomous Snakes Vector-Borne Diseases Mosquito-Borne Diseases Tick-Borne Diseases Lyme Disease ...

  19. An Application of Tripterygium Wilfordii Aconitum Carmichaeli Root and Bee Venom in Rheumatic Disease Treatment%雷公藤、附子、蜂毒在风湿病中的应用

    Institute of Scientific and Technical Information of China (English)

    黄胜光; 谭宁; 朱辉军

    2011-01-01

    雷公藤、附子、蜂毒在中医治疗风湿病的领域中历史悠久且应用广泛.作者回顾了历代医家对其的认识,并阐述了其现代研究热点,并在长期临床实践的基础上,总结其应用的特点及需要注意的问题.%Tripterygium wilfordii, Aeonitum carmichaeli root and Bee venom have been widely used to treat rheumatic disease for centuries.The author summarizes the experiences and opinions of ancient Chinese medicine doctors about the three traditional Chinese medicines, the focus of current research, the application features and the important facts based on years of clinical experience.

  20. Fibrin(ogen)olytic activity of bumblebee venom serine protease

    International Nuclear Information System (INIS)

    Bee venom is a rich source of pharmacologically active components; it has been used as an immunotherapy to treat bee venom hypersensitivity, and venom therapy has been applied as an alternative medicine. Here, we present evidence that the serine protease found in bumblebee venom exhibits fibrin(ogen)olytic activity. Compared to honeybee venom, bumblebee venom contains a higher content of serine protease, which is one of its major components. Venom serine proteases from bumblebees did not cross-react with antibodies against the honeybee venom serine protease. We provide functional evidence indicating that bumblebee (Bombus terrestris) venom serine protease (Bt-VSP) acts as a fibrin(ogen)olytic enzyme. Bt-VSP activates prothrombin and directly degrades fibrinogen into fibrin degradation products. However, Bt-VSP is not a plasminogen activator, and its fibrinolytic activity is less than that of plasmin. Taken together, our results define roles for Bt-VSP as a prothrombin activator, a thrombin-like protease, and a plasmin-like protease. These findings offer significant insight into the allergic reaction sequence that is initiated by bee venom serine protease and its potential usefulness as a clinical agent in the field of hemostasis and thrombosis. - Graphical abstract: Display Omitted Highlights: → Bumblebee venom serine protease (Bt-VSP) is a fibrin(ogen)olytic enzyme. → Bt-VSP activates prothrombin. → Bt-VSP directly degrades fibrinogen into fibrin degradation products. → Bt-VSP is a hemostatically active protein that is a potent clinical agent.

  1. In vitro hemolytic activity of Bothrops lanceolatus (fer-de-lance) venom

    OpenAIRE

    LJ Martins; PMF de Araújo; Bon, C.; S. HYSLOP; AL de Araújo

    2009-01-01

    Bothrops lanceolatus venom contains a variety of enzymatic and biological activities. The present work investigated the hemolytic activity of this venom and its phospholipase A2 (PLA2). Bothrops lanceolatus venom (6.7 µg/mL) caused indirect hemolysis of cow, horse, rat and sheep erythrocytes, with horse erythrocytes being the most sensitive; no direct hemolysis was observed. Hemolysis in sheep erythrocytes was concentration-dependent (5-11.7 µg/mL) and markedly attenuated by heating the venom...

  2. A continuous spectrophotometric assay that distinguishes between phospholipase A1 and A2 activities.

    Science.gov (United States)

    El Alaoui, Meddy; Soulère, Laurent; Noiriel, Alexandre; Popowycz, Florence; Khatib, Abdallah; Queneau, Yves; Abousalham, Abdelkarim

    2016-08-01

    A new spectrophotometric assay was developed to measure, continuously and specifically, phospholipase A1 (PLA1) or phospholipase A2 (PLA2) activities using synthetic glycerophosphatidylcholines (PCs) containing α-eleostearic acid, either at the sn-1 position [1-α-eleostearoyl-2-octadecyl-rac-glycero-3-phosphocholine (EOPC)] or at the sn-2 position [1-octadecyl-2-α-eleostearoyl-rac-glycero-3-phosphocholine (OEPC)]. The substrates were coated onto the wells of microtiter plates. A nonhydrolyzable ether bond, with a non-UV-absorbing alkyl chain, was introduced at the other sn position to prevent acyl chain migration during lipolysis. Upon enzyme action, α-eleostearic acid is liberated and then solubilized into the micellar phase. The PLA1 or PLA2 activity was measured by the increase in absorbance at 272 nm due to the transition of α-eleostearic acid from the adsorbed to the soluble state. EOPC and OEPC differentiate, with excellent accuracy, between PLA1 and PLA2 activity. Lecitase(®), guinea pig pancreatic lipase-related protein 2 (known to be a PLA1 enzyme), bee venom PLA2, and porcine pancreatic PLA2 were all used to validate the assay. Compared with current assays used for continuously measuring PLA1 or PLA2 activities and/or their inhibitors, the development of this sensitive enzymatic method, using coated PC substrate analogs to natural lipids and based on the UV spectroscopic properties of α-eleostearic acid, is a significant improvement. PMID:27194811

  3. Bioactive peptide from bee venom for adjuvant-induced arthritis in rats%蜂毒活性肽对大鼠佐剂性关节炎的作用

    Institute of Scientific and Technical Information of China (English)

    余晓东; 李博

    2005-01-01

    BACKGROUND: Traditionally, bee venom can treat rheumatic arthritis,rheumatoid arthritis(RA) and so on, but it has strong side effects. So it has been hoped for a long time that the effective angle component could be screened from bee venom, which can be used for the treatment of arthritis perfectly than bee venom.OBJECTIVE: To investigate whether bioactive peptide from bee venom could inhibit infection of arthritis by regulating immunological function so as to probe into a new treatment for RADESIGN: Completely randomized controlled experimental trial based on experimental animalsMETHODS: A municipal key laboratory of animal biology.MATERIALS: The experiment was carried out in the Chongqing Key Laboratory of animal biology from January 2001 to May 2002. Totally 80 rats of clean grade aged 2 to 3 months old with the body mass of 180 to 200 g were provided by Animal Experiment Center of Third Military Medical University of Chinese PLA. The experimental animal certification number was SYXK1 (army) 2002 -007. The animals were divided into 3 groups: normal control group( 10 cases), arthritis group( 10 cases), bioactive peptide group(30 cases).METHODS: Adjuvant-induced arthritis animal models were used and bioactive peptide were given to the animals by muscle injection to observe the knuckle volume and knuckle index changes.MAIN OUTCOME MEASURES: The effect of bioactive peptide from bee venom on the change of knuckle volume and knuckle index in adjuvant-induced arthritis ratsRESULTS: Ten days after injection of 0. 15 mg for each rat, the volume of the paw was (4.72 ±0. 58) mL and the knuckle index was (4.47 ±0.46) mL,which there was significant difference compared with the control group (P< 0. 05).CONCLUSION: P-peptide possibly has certain inhibitory effect on the development of the adjuvant-induced arthritis in Wistar rat, and will possibly be a potential therapeutic drug.%背景:传统上用蜜蜂粗毒治疗风湿性关节炎、类风湿性关节炎等,但有很

  4. Diagnosis of snake envenomation using a simple phospholipase A2 assay

    OpenAIRE

    Kalana Maduwage; Margaret A. O'Leary; Isbister, Geoffrey K.

    2014-01-01

    Diagnosis of snake envenomation is challenging but critical for deciding on antivenom use. Phospholipase A2 enzymes occur commonly in snake venoms and we hypothesized that phospholipase activity detected in human blood post-bite may be indicative of envenomation. Using a simple assay, potentially a bedside test, we detected high phospholipase activity in sera of patients with viper and elapid envenomation compared to minimal activity in non-envenomed patients.

  5. Anti-necrosis potential of polyphenols against snake venoms.

    Science.gov (United States)

    Leanpolchareanchai, Jiraporn; Pithayanukul, Pimolpan; Bavovada, Rapepol

    2009-01-01

    Polyphenols from the extracts of Areca catechu L. and Quercus infectoria Oliv. inhibited phospholipase A(2), proteases, hyaluronidase and L-amino acid oxidase of Naja naja kaouthia Lesson (NK) and Calloselasma rhodostoma Kuhl (CR) venoms by in vitro tests. Both extracts inhibited the hemorrhagic activity of CR venom and the dermonecrotic activity of NK venom by in vivo tests. The inhibitory activity of plant polyphenols against local tissue necrosis induced by snake venoms may be caused by inhibition of inflammatory reactions, hemorrhage, and necrosis. The result implies the therapeutic potential of plant polyphenols against necrosis in snakebite victims. PMID:19874222

  6. Characterization of venom (Duvernoy's secretion) from twelve species of colubrid snakes and partial sequence of four venom proteins.

    Science.gov (United States)

    Hill, R E; Mackessy, S P

    2000-12-01

    R.E. Hill and S.P. Mackessy. Characterization of venom (Duvernoy's secretion) from twelve species of colubrid snakes and partial sequence of four venom proteins. Toxicon XX, xx-yy, 2000. - Venomous colubrids, which include more than 700 snake species worldwide, represent a vast potential source of novel biological compounds. The present study characterized venom (Duvernoy's gland secretion) collected from twelve species of opisthoglyphous (rear-fanged) colubrid snakes, an extremely diverse assemblage of non-venomous to highly venomous snakes. Most venoms displayed proteolytic activity (casein), though activity levels varied considerably. Low phosphodiesterase activity was detected in several venoms (Amphiesma stolata, Diadophis punctatus, Heterodon nasicus kennerlyi, H. n. nasicus and Thamnophis elegans vagrans), and acetylcholinesterase was found in Boiga irregularis saliva and venom, but no venoms displayed hyaluronidase, thrombin-like or kallikrein-like activities. High phospholipase A(2) (PLA(2)) activity was found in Trimorphodon biscutatus lambda venom, and moderate levels were detected in Boiga dendrophila and D. p. regalis venoms as well as B. dendrophila and H. n. nasicus salivas. Non-reducing SDS-PAGE revealed 7-20 protein bands (3.5 to over 200 kD, depending on species) for all venoms analyzed, and electrophoretic profiles of venoms were typically quite distinct from saliva profiles. Components from A. stolata, Hydrodynastes gigas, Tantilla nigriceps and T. e. vagrans venoms showed protease activity when run on gelatin zymogram gels. N-terminal protein sequences for three 26 kD venom components of three species (H. gigas, H. torquata, T. biscutatus) and one 3.5 kD component (T. nigriceps) were also obtained, and the 3.5 kD peptide showed apparent sequence homology with human vascular endothelial growth factor; these data represent the first sequences of colubrid venom components. Protease, phosphodiesterase and PLA(2) activities are also common to elapid

  7. Bee venom treatment reduced C-reactive protein and improved follicle quality in a rat model of estradiol valerate-induced polycystic ovarian syndrome

    OpenAIRE

    Karimzadeh, L; M Nabiuni; Sheikholeslami, A.; S Irian

    2012-01-01

    Polycystic ovarian syndrome (PCOS) is a low grade inflammatory disease characterized by hyperandrogenemia and chronic anovulation. C-reactive protein (CRP), released by adipocytes, plays a key role in PCOS. Apis mellifera honeybee venom (HBV) contains a variety of biologically active components with various pharmaceutical properties. This study was designed to assess the possibility of HBV application as an anti-inflammatory therapeutic agent. To induce PCOS, 1 mg/100 g body weight estradiol ...

  8. Rabbit IgG antibodies against Phospholipase A2 from Crotalus durissus terrificus neutralize the lethal activity of the venom Los anticuerpos IgG de conejos anti-fosfolipasa A2 de Crotalus durissus terrificus neutralizan la actividad letal del veneno

    Directory of Open Access Journals (Sweden)

    Juan P. Rodríguez

    2006-12-01

    Full Text Available Crotalus durissus terrificus (C.d.t. (South American rattlesnake venom possesses myotoxic and neurotoxic activities, both of which are also expressed by crotoxin, the principal toxin of this venom. Crotoxin contains a basic phospholipase A2 (PLA2 and a non toxic acidic protein, crotapotin. We have produced and investigated the ability of IgG antibodies raised in rabbits against PLA2 to neutralize the lethality of the whole venom. PLA2 was isolated by gel filtration chromatography (Sephadex G-75. Specific antibodies were obtained by subcutaneous and intramuscular inoculation of PLA2 (700 µg with Freund adjuvant. Groups of six mice (20 + 2 g were inoculated with 0.5 ml i.p. of C. d. t. venom (4 µg or a mixture of venom that had been preincubated with the desired volume of IgG antibodies. Mortality, recorded 24 and 48 h after inoculation, showed that IgG anti-PLA2 were more effective than anticrotalic serum in neutralizing the lethal activity. These results demonstrate that it could be possible to obtain an anti-venom made by specific antibodies with a high level of protection against the lethal component of C.d.t. venom, and/or the inclusion of these antibodies as a supplement in heterologous anti-venoms.El veneno de Crotalus durissus terrificus (C.d.t. (Cascabel de Sud América posee actividad miotóxica y neurotóxica, actividades que también exhibe el complejo crotoxina, principal componente tóxico de este veneno. El complejo crotoxina está constituido por una fosfolipasa A2 básica (PLA2 y una proteína acídica no tóxica, el crotapotín. En este trabajo se estudió la capacidad neutralizante de anticuerpos IgG anti-PLA2 sobre la letalidad inducida por el veneno entero. El antígeno PLA2, fue aislado por cromatografía de filtración en gel (Sephadex G-75. Se inocularon conejos machos por vía subcutánea e intramuscular, con 700 µg de PLA2 y adyuvante para la obtención de anticuerpos específicos. La capacidad neutralizante del

  9. Differential Properties of Venom Peptides and Proteins in Solitary vs. Social Hunting Wasps

    Directory of Open Access Journals (Sweden)

    Si Hyeock Lee

    2016-01-01

    Full Text Available The primary functions of venoms from solitary and social wasps are different. Whereas most solitary wasps sting their prey to paralyze and preserve it, without killing, as the provisions for their progeny, social wasps usually sting to defend their colonies from vertebrate predators. Such distinctive venom properties of solitary and social wasps suggest that the main venom components are likely to be different depending on the wasps’ sociality. The present paper reviews venom components and properties of the Aculeata hunting wasps, with a particular emphasis on the comparative aspects of venom compositions and properties between solitary and social wasps. Common components in both solitary and social wasp venoms include hyaluronidase, phospholipase A2, metalloendopeptidase, etc. Although it has been expected that more diverse bioactive components with the functions of prey inactivation and physiology manipulation are present in solitary wasps, available studies on venom compositions of solitary wasps are simply too scarce to generalize this notion. Nevertheless, some neurotoxic peptides (e.g., pompilidotoxin and dendrotoxin-like peptide and proteins (e.g., insulin-like peptide binding protein appear to be specific to solitary wasp venom. In contrast, several proteins, such as venom allergen 5 protein, venom acid phosphatase, and various phospholipases, appear to be relatively more specific to social wasp venom. Finally, putative functions of main venom components and their application are also discussed.

  10. Intraspecific Variation of Centruroides Edwardsii Venom from Two Regions of Colombia

    Directory of Open Access Journals (Sweden)

    Sebastián Estrada-Gómez

    2014-07-01

    Full Text Available We report the first description studies, partial characterization, and intraspecific difference of Centruroides edwardsii, Gervais 1843, venom. C. edwardsii from two Colombian regions (Antioquia and Tolima were evaluated. Both venoms showed hemolytic activity, possibly dependent of enzymatic active phospholipases, and neither coagulant nor proteolytic activities were observed. Venom electrophoretic profile showed significant differences between C. edwardsii venom from both regions. A high concentration of proteins with molecular masses between 31 kDa and 97.4 kDa, and an important concentration close or below 14.4 kDa were detected. RP-HPLC retention times between 38.2 min and 42.1 min, showed bands close to 14.4 kDa, which may correspond to phospholipases. RP-HPLC venom profile showed a well conserved region in both venoms between 7 and 17 min, after this, significant differences were detected. From Tolima region venom, 50 well-defined peaks were detected, while in the Antioquia region venom, 55 well-defined peaks were detected. Larvicidal activity was only detected in the C. edwardsii venom from Antioquia. No antimicrobial activity was observed using complete venom or RP-HPLC collected fractions of both venoms. Lethally activity (carried out on female albino swiss mice was detected at doses over 19.2 mg/kg of crude venom. Toxic effects included distress, excitability, eye irritation and secretions, hyperventilation, ataxia, paralysis, and salivation.

  11. Advance on the Main Compositions and the Functions of Honeybee Venom%蜜蜂蜂毒主要成分与功能研究进展

    Institute of Scientific and Technical Information of China (English)

    高丽娇; 吴杰

    2013-01-01

      蜜蜂蜂毒(honeybee venom)作为重要的蜂产品之一,其中的很多蛋白在抗炎、抗癌、抗菌、抗辐射和杀虫等方面具有很好的效果.20世纪40年代以来,国内外在蜂毒活性成分分析、作用机理、重要基因克隆和毒蛋白功能等方面进行广泛地研究,取得了重要的进展.本文的目的是总结蜜蜂蜂毒主要成分磷脂酶A2、透明质酸酶、蜂毒肽、蜂毒明肽、肥大细胞脱粒肽和镇静肽等毒蛋白的基因结构、生化特性及功能等方面的研究进展,为蜂毒基因的研究和利用提供一定的理论基础.%Honeybee venom is one of important bee products, of which many proteins were identified to play a role in anti-inflammatory, anti-cancer, antimicrobial, anti-radiation, insect disinfestation, and so on. Since 1940s, there had made many significant advances in component analysis, action mechanisms, gene cloning, and protein function analysis of honeybee's venom. The aim of present review was to summarize the gene structure, biochemical characteristics and function of the main components in honeybee venom, such as phospholipase A2, hyaluronidase, melittin, apamin, mast cell degranulating peptides and secapin. It would will provide the theoretical basis for the research and utilization of honeybee venom.

  12. Glutamate signalling and secretory phospholipase A2 modulate the release of arachidonic acid from neuronal membranes

    DEFF Research Database (Denmark)

    Rodriguez De Turco, Elena B; Jackson, Fannie R; DeCoster, Mark A;

    2002-01-01

    secretory PLA(2) (sPLA(2)) from bee venom (bv sPLA(2)) and Taipan snake venom (OS2) elicit synergy in inducing neuronal cell death. Low concentrations of sPLA(2) are selective ligands of cell-surface sPLA(2) receptors. We investigated which neuronal arachidonoyl phospholipids are targeted by glutamate...

  13. General biochemical and immunological characteristics of the venom from Peruvian scorpion Hadruroides lunatus.

    Science.gov (United States)

    Costal-Oliveira, F; Duarte, C G; Machado de Avila, R A; Melo, M M; Bordon, K C F; Arantes, E C; Paredes, N C; Tintaya, B; Bonilla, C; Bonilla, R E; Suarez, W S; Yarleque, A; Fernandez, J M; Kalapothakis, E; Chávez-Olórtegui, Carlos

    2012-10-01

    This communication describes the general biochemical properties and some immunological characteristics of the venom from the Peruvian scorpion Hadruroides lunatus, which is the most medically relevant species in Peru. The soluble venom of this scorpion is toxic to mice, the LD₅₀ determined was 0.1 mg/kg and 21.55 mg/kg when the venom was injected intracranial or intraperitoneally, respectively. The soluble venom displayed proteolytic, hyaluronidasic, phospholipasic and cardiotoxic activities. High performance liquid chromatography of the soluble venom resulted in the separation of 20 fractions. Two peptides with phospholipasic activity were isolated to homogeneity and their molecular masses determined by mass spectrometry (MALDI TOF). Anti-H. lunatus venom sera were produced in rabbits. Western blotting analysis showed that most of the protein content of this venom is immunogenic. H. lunatus anti-venom displayed consistent cross-reactivity with venom antigens from the new World-scorpions Tityus serrulatus and Centruroides sculpturatus venoms; however, a weaker reactivity was observed against the venom antigens from the old World-scorpion Androctonus australis Hector. PMID:22750532

  14. A simple non-invasive technique for venom milking from a solitary wasp Delta conoideum Gmelin (Hymenoptera: Vespidae).

    Science.gov (United States)

    Bhagavathula, Naga Chaitanya; Kumar, Mukesh; Krishnappa, Chandrashekra

    2016-01-01

    Prospecting wasp, ant and bee venom for active bio-molecules has gained considerable interest among researchers in recent years. Collecting sufficient quantity of venom from solitary wasps without sacrificing them is often difficult. Here we describe a non-invasive technique for collecting venom from a solitary wasp Delta conoideum Gmelin (Red-backed potter wasp). Venom was milked by presenting an agar block to a single female wasp for stinging. The venom was extracted from the agar block using ACN: water solvent system. The total protein in venom was estimated quantitatively and the presence of peptides in the venom was confirmed by MALDI-TOF analysis. The proposed technique is non-invasive and pure venom can be repeatedly 'milked' using this method from other wasps and also bees without the need for sacrificing a large number of individuals. PMID:26556656

  15. Linear B-cell epitopes in BthTX-1, BthTX-II and BthA-1, phospholipase A₂'s from Bothrops jararacussu snake venom, recognized by therapeutically neutralizing commercial horse antivenom.

    Science.gov (United States)

    De-Simone, Salvatore G; Napoleão-Pego, Paloma; Teixeira-Pinto, Luiz A L; Santos, Jonathas D L; De-Simone, Thatiane S; Melgarejo, Anibal R; Aguiar, Aniesse S; Marchi-Salvador, Daniela P

    2013-09-01

    The benefits from treatment with antivenom sera are indubitable. However, the mechanism for toxin neutralization has not been completely elucidated. A mixture of anti-bothropic and anti-crotalic horse antivenom has been reported to be more effective in neutralizing the effects of Bothrops jararacussu snake venom than anti-bothropic antivenom alone. This study determined which regions in the three PLA₂s from B. jararacussu snake venom are bound by antibodies in tetravalent anti-bothropic and monovalent anti-crotalic commercial horse antivenom. Mapping experiments of BthTX-I, BthTX-II and BthA-I using two small libraries of 69 peptides each revealed six major IgG-binding epitopes that were recognized by both anti-bothropic and anti-crotalic horse antivenom. Two epitopes in BthTX-I were only recognized by the anti-bothropic horse antivenom, while anti-crotalic horse antivenom recognized four unique epitopes across the three PLA₂s. Our studies suggest that the harmful activities of the PLA₂s present in the venom of B. jararacussu are neutralized by the combinatorial treatment with both antivenom sera through their complementary binding sites, which provides a wide coverage on the PLA₂s. This is the first peptide microarray of PLA₂s from B. jararacussu snake venom to survey the performance of commercial horse antiophidic antivenom. Regions recognized by the protective antivenom sera are prime candidates for improved venom cocktails or a chimeric protein encoding the multiple epitopes to immunize animals as well as for designing future synthetic vaccines. PMID:23792452

  16. Bee Venom Accelerates Wound Healing in Diabetic Mice by Suppressing Activating Transcription Factor-3 (ATF-3) and Inducible Nitric Oxide Synthase (iNOS)-Mediated Oxidative Stress and Recruiting Bone Marrow-Derived Endothelial Progenitor Cells.

    Science.gov (United States)

    Badr, Gamal; Hozzein, Wael N; Badr, Badr M; Al Ghamdi, Ahmad; Saad Eldien, Heba M; Garraud, Olivier

    2016-10-01

    Multiple mechanisms contribute to impaired diabetic wound healing including impaired neovascularization and deficient endothelial progenitor cell (EPC) recruitment. Bee venom (BV) has been used as an anti-inflammatory agent for the treatment of several diseases. Nevertheless, the effect of BV on the healing of diabetic wounds has not been studied. Therefore, in this study, we investigated the impact of BV on diabetic wound closure in a type I diabetic mouse model. Three experimental groups were used: group 1, non-diabetic control mice; group 2, diabetic mice; and group 3, diabetic mice treated with BV. We found that the diabetic mice exhibited delayed wound closure characterized by a significant decrease in collagen production and prolonged elevation of inflammatory cytokines levels in wounded tissue compared to control non-diabetic mice. Additionally, wounded tissue in diabetic mice revealed aberrantly up-regulated expression of ATF-3 and iNOS followed by a marked elevation in free radical levels. Impaired diabetic wound healing was also characterized by a significant elevation in caspase-3, -8, and -9 activity and a marked reduction in the expression of TGF-β and VEGF, which led to decreased neovascularization and angiogenesis of the injured tissue by impairing EPC mobilization. Interestingly, BV treatment significantly enhanced wound closure in diabetic mice by increasing collagen production and restoring the levels of inflammatory cytokines, free radical, TGF-β, and VEGF. Most importantly, BV-treated diabetic mice exhibited mobilized long-lived EPCs by inhibiting caspase activity in the wounded tissue. Our findings reveal the molecular mechanisms underlying improved diabetic wound healing and closure following BV treatment. J. Cell. Physiol. 231: 2159-2171, 2016. © 2016 Wiley Periodicals, Inc. PMID:26825453

  17. Is Hybridization a Source of Adaptive Venom Variation in Rattlesnakes? A Test, Using a Crotalus scutulatus × viridis Hybrid Zone in Southwestern New Mexico

    OpenAIRE

    Giulia Zancolli; Timothy G. Baker; Axel Barlow; Rebecca K. Bradley; Calvete, Juan J.; Kimberley C. Carter; Kaylah de Jager; John Benjamin Owens; Jenny Forrester Price; Libia Sanz; Amy Scholes-Higham; Liam Shier; Liam Wood; Catharine E. Wüster; Wolfgang Wüster

    2016-01-01

    Venomous snakes often display extensive variation in venom composition both between and within species. However, the mechanisms underlying the distribution of different toxins and venom types among populations and taxa remain insufficiently known. Rattlesnakes (Crotalus, Sistrurus) display extreme inter- and intraspecific variation in venom composition, centered particularly on the presence or absence of presynaptically neurotoxic phospholipases A2 such as Mojave toxin (MTX). Interspecific hy...

  18. Bee venom treatment reduced C-reactive protein and improved follicle quality in a rat model of estradiol valerate-induced polycystic ovarian syndrome

    Directory of Open Access Journals (Sweden)

    L Karimzadeh

    2012-01-01

    Full Text Available Polycystic ovarian syndrome (PCOS is a low grade inflammatory disease characterized by hyperandrogenemia and chronic anovulation. C-reactive protein (CRP, released by adipocytes, plays a key role in PCOS. Apis mellifera honeybee venom (HBV contains a variety of biologically active components with various pharmaceutical properties. This study was designed to assess the possibility of HBV application as an anti-inflammatory therapeutic agent. To induce PCOS, 1 mg/100 g body weight estradiol valerate (EV was subcutaneously (SC injected into eight-week-old rats. After 60 days, 0.5 mg/kg HBV was administered SC for 14 consecutive days, and the results of PCOS treatment were investigated. Rats were then anesthetized with chloroform, and their ovaries and livers were surgically removed to determine histomorphometrical changes. Testosterone and 17-β-estradiol were detected by chemiluminescence immunoassay. In order to detect serum CRP, ELISA kit was used in three groups of EV-induced PCOS, HBV-treated PCOS and control animals. Thickness of the theca layer, number of cysts and the level of serum CRP significantly decreased in HBV group in comparison with PCOS group. Moreover, corpus luteum, as a sign of ovulation, was observed in HBV-treated ovaries which were absent in PCOS group. Our results suggest that the beneficial effect of HBV may be mediated through its inhibitory effect on serum CRP levels.

  19. 皮下蜜蜂毒致持续性自发痛反应的两种定量方法及吗啡抑制效果%Two methods of quantitating the bee venom-induced spontaneous pain- related responses and the analgesic effect of morphine

    Institute of Scientific and Technical Information of China (English)

    孙焱芫; 熊利泽; 陈军; 李会莉; 王丽芸

    2001-01-01

    AIM To compare two methods of quantitating spontaneou s pain-related re sponses on evaluating the analgesic effect of morphine. METHODS After subcutaneo us injection of bee venom into the plantar of one hindpaw in rats, the nocicepti ve responses were evaluated by two different methods: by counting the number of flinching reflex and by the four grade weight scoring. RESULTS  The suppressive e ffect of pretreatment with morphine i.v. was found. Pretreatment with 0.015, 0. 15, 0.3, 0.47, 1.5, 3.0 mg*kg-1 morpine i.v. significantly produced a dos e-dependent suppress ion of the bee venom-induced spontaneous pain-related responses (P<0.05). The inhibitory rates were 17, 39, 48, 52, 62 and 89 per cent. The ED50 of morphine was 0.29 mg*kg-1 . Pretreatment with 1.5 mg*kg-1 morphine i.v. produced significant sup pression on the bee venom-induced lifting/ licking nociceptive score. CONCLUSION Pretreatment with morphin e i.v. can produce a dose-dependent suppression on the bee venom-induced spontaneous flinching ref le x. In the bee venom test, the spontaneous flinching reflex as quantitative measu re of spontaneous pain-related responses is more simple, stable and objective t han lifting/licking nociceptive score.%目的 比较两种定量检测皮下蜜蜂毒所致自发痛反应的方法及吗 啡的镇痛效果. 方法 采用大鼠足底皮下注入蜜蜂毒致痛模型,分别以自 发缩足反射次数和四级负重记分两 种定量方法观察记录伤害性反应. 结果 静脉吗啡预处理对大鼠足底注入 蜜蜂毒致自发痛 反应具有一定抑制作用;以自发缩足反射次数定量,6种剂量(0.015, 0.15, 0.3, 0.47, 1 .5和3.0 mg*kg-1)吗啡呈剂量依赖性抑制效应,抑制率分别为:17, 39, 48, 52, 62和89 %,与对照组比较均具有统计学差异(P<0.05),其半数抑制有效量(ED50)为0 .29 mg *kg-1;而采用四级负重记分法定量,仅吗啡1.5 mg*kg-1实验组的抑制具有

  20. Coral snake venoms: mode of action and pathophysiology of experimental envenomation

    Directory of Open Access Journals (Sweden)

    Oswald Vital Brazil

    1987-06-01

    Full Text Available Coral snakes, the New World Elapidae, are included in the genera Micniroides and Micrurus. The genus Mlcrurus comprises nearly all coral snake species and those which are responsible for human snake-bite accidents. The following generalizations concerning the effects induced by their venoms, and their venom-properties can be made. Coral snake venoms are neurotoxic, producing loss of muscle strenght and death by respiratory paralysis. Local edema and necrosis are not induced nor blood coagulation or hemorrhages. Proteolysis activity is absent or of very low grade. They display phospholipase A2 activity. Nephrotoxic effects are not evoked. The main toxins from elapid venoms are postsynaptic and presynaptic neurotoxins and cardiotoxins. Phospholipases A2 endowed with myonecrotic or cardiotoxin-like properties are important toxic components from some elapid venoms. The mode of action of Micrurus frontalis, M. lemniscatus, M. corallinus and M. fulvius venoms has been investigated in isolated muscle preparations and is here discussed. It is shown that while M. frontalis and M. lemniscatus venoms must contain only neurotoxins that act at the cholinergic end-plate receptor (postsynaptic neurotoxins, M. corallinus venom also inhibits evoked acetylcholine release by the motor nerve endings (presynaptic neurotoxin-like effect and M. fulvius induces muscle fiber membrane depolarization (cardiotoxin-like effect. The effects produced by M. corallinus and M. fulvius venoms in vivo in dogs and M. frontalis venom in dogs and monkeys are also reported.

  1. Coagulant and anticoagulant activities of Bothrops lanceolatus (Fer de lance) venom.

    Science.gov (United States)

    Lôbo de Araújo, A; Kamiguti, A; Bon, C

    2001-01-01

    Bothrops lanceolatus venom contains caseinolytic, phospholipase, esterase and haemorrhagic activities. We have investigated the coagulant and anticoagulant actions of B. lanceolatus venom on human citrated plasma and on purified plasma components. Although B. lanceolatus venom up to 50 microg/ml was unable to clot citrated plasma, at concentrations > or = 5 microg/ml the venom dose-dependently clotted purified human fibrinogen, indicating the presence of a thrombin-like enzyme. Human plasma (final concentration > or = 12.5%) dose-dependently inhibited the venom-induced fibrinogen clotting. This finding suggested that endogenous plasma protease inhibitors can affect the venom's action on fibrinogen. To investigate this possibility, B. lanceolatus venom was incubated with different plasma protease inhibitors and the activity on fibrinogen tested. alpha(2)-Macroglobulin and alpha(1)-antitrypsin did not interfere with the coagulant activity of the venom whereas the antithrombin-III/heparin complex partially inhibited this activity. A non-toxic, acidic phospholipase A(2) purified from B. lanceolatus venom prolonged the activated partial thromboplastin time in human plasma from 39.7+/-0.5 s (control with saline) to 60.2+/-0.9 s with 50 microg of PLA(2) (p<0.001), suggesting an anticoagulant activity associated with this enzyme. This anticoagulant activity may account for some of the effects of the venom on blood coagulation. PMID:10978756

  2. Mass envenomations by honey bees and wasps.

    OpenAIRE

    Vetter, R S; Visscher, P.K.; Camazine, S

    1999-01-01

    Stinging events involving honey bees and wasps are rare; most deaths or clinically important incidents involve very few stings (< 10) and anaphylactic shock. However, mass stinging events can prove life-threatening via the toxic action of the venom when injected in large amounts. With the advent of the Africanized honey bee in the southwestern United States and its potential for further spread, mass envenomation incidents will increase. Here we review the literature on mass stinging events in...

  3. CNS myelin structural modification induced in vitro by phospholipases A2.

    Science.gov (United States)

    Yunes Quartino, Pablo J; Pusterla, Julio M; Galván Josa, Victor M; Fidelio, Gerardo D; Oliveira, Rafael G

    2016-01-01

    Myelin is the self-stacked membrane surrounding axons; it is also the target of several pathological and/or neurodegenerative processes like multiple sclerosis. These processes involve, among others, the hydrolytic attack by phospholipases. In this work we describe the changes in isolated myelin structure after treatment with several secreted PLA2 (sPLA2), by using small angle x-ray scattering (SAXS) measurements. It was observed that myelin treated with all the tested sPLA2s (from cobra and bee venoms and from pig pancreas) preserved the lamellar structure but displayed an enlarged separation between membranes in certain zones. Additionally, the peak due to membrane asymmetry was clearly enhanced. The coherence length was also lower than the non-treated myelin, indicating increased disorder. These SAXS results were complemented by Langmuir film experiments to follow myelin monolayer hydrolysis at the air/water interface by a decrease in electric surface potential at different surface pressures. All enzymes produced hydrolysis with no major qualitative difference between the isoforms tested. PMID:26514604

  4. Study of gamma radiation from 60Co effects on Apis mellifera venom: biochemical, pharmacological and immunological aspects

    International Nuclear Information System (INIS)

    Africanized honeybees are very common insects in Brazil and frequently cause accidents followed by important immunological reactions and even deaths. Their venoms are composed of a complex mixture of substances of general biological actions. Ionizing radiation is able to modify molecular structures affecting the biological properties of proteins. It decreases toxic and enzymatic activities and so, it appears promising as a venom detoxification tool. The main objective of this work was to study the effects of gamma radiation on bee venom, regarding biochemical, pharmacological and immunological aspects. Africanized Apis mellifera whole venom (2 mg/ml) in 0.15 M NaCl solution was irradiated with 2 kGy in a 60Co source. Native and irradiated bee venoms were submitted to high performance size exclusion chromatography (Tosohaas G2000SW column), high performance reversed phase chromatography in a C-18 column under water/acetonitrile gradient, SDS-PAGE. For both venoms studies have been carried out in UV absorption spectrum, protein concentration, hemolytic activity, and PLA2 activity analysis, lethality assay (LD50). Biodistribution studies was carried out after labelling native and irradiated bee venom with 99mTc. The results showed that gamma radiation did not change the protein concentration nor its immunogenicity, although it could be observed that irradiated bee venom UV spectrum and SDS-PAGE profile presented differences when compared to native bee venom. This suggests that some structural alterations in bee venom components could have occurred after irradiation. HPLC-RP profiles showed that gamma radiation could have caused conformational changes, such as unfolding of molecule chains, changing their hydrophobic groups exposuring. The hemolytic and the PLA2 activities of irradiated bee venom were smaller than the native ones. The gamma radiation diminished the toxicity of bee venom, but did not abolish its bioactivity, like hemolysis. Biodistribution studies showed

  5. Crystallization and preliminary X-ray crystallographic analysis of the heterodimeric crotoxin complex and the isolated subunits crotapotin and phospholipase A2

    OpenAIRE

    Santos, K. F.; Murakami, M T; Cintra, A. C. O.; Toyama, M. H.; Marangoni, S.; Forrer, V. P.; Brandão Neto, J. R.; Polikarpov, I.; Arni, R. K.

    2007-01-01

    Crotoxin, a potent neurotoxin from the venom of the South American rattlesnake Crotalus durissus terrificus, exists as a heterodimer formed between a phospholipase A2 and a catalytically inactive acidic phospholipase A2 analogue (crotapotin). Large single crystals of the crotoxin complex and of the isolated subunits have been obtained.

  6. Melittin, a honeybee venom-derived antimicrobial peptide, may target methicillin-resistant Staphylococcus aureus

    OpenAIRE

    Choi, Ji Hae; JANG, A YEUNG; Lin, Shunmei; Lim, Sangyong; Kim, Dongho; Park, Kyungho; Han, Sang-Mi; YEO, JOO-HONG; Seo, Ho Seong

    2015-01-01

    Methicillin-resistant Staphylococcus aureus (MRSA) is difficult to treat using available antibiotic agents. Honeybee venom has been widely used as an oriental treatment for several inflammatory diseases and bacterial infections. The venom contains predominantly biologically active compounds, however, the therapeutic effects of such materials when used to treat MRSA infections have not been investigated extensively. The present study evaluated bee venom and its principal active component, meli...

  7. HYMENOPTERA ALLERGENS: FROM VENOM TO VENOME

    OpenAIRE

    Edzard eSpillner; Simon eBlank; Thilo eJakob

    2014-01-01

    In Western Europe hymenoptera venom allergy primarily relates to venoms of the honeybee and the common yellow jacket. In contrast to other allergen sources, only a few major components of hymenoptera venoms had been characterized until recently. Improved expression systems and proteomic detection strategies have allowed the identification and characterization of a wide range of additional allergens. The field of hymenoptera venom allergy research has moved rapidly from focusing on venom extr...

  8. Allergies to Insect Venom

    Science.gov (United States)

    ... attracts these insects.  Use insect repellents and keep insecticide available. Treatment tips:  Venom immunotherapy (allergy shots to insect venom(s) is highly effective in preventing subsequent sting ...

  9. Snake venoms components with antitumor activity in murine melanoma cells

    International Nuclear Information System (INIS)

    Despite the constant advances in the treatment of cancer, this disease remains one of the main causes of mortality worldwide. So, the development of new treatment modalities is imperative. Snake venom causes a variety of biological effects because they constitute a complex mixture of substances as disintegrins, proteases (serine and metalo), phospholipases A2, L-amino acid oxidases and others. The goal of the present work is to evaluate a anti-tumor activity of some snake venoms fractions. There are several studies of components derived from snake venoms with this kind of activity. After fractionation of snake venoms of the families Viperidae and Elapidae, the fractions were assayed towards murine melanoma cell line B16-F10 and fibroblasts L929. The results showed that the fractions of venom of the snake Notechis ater niger had higher specificity and potential antitumor activity on B16-F10 cell line than the other studied venoms. Since the components of this venom are not explored yet coupled with the potential activity showed in this work, we decided to choose this venom to develop further studies. The cytotoxic fractions were evaluated to identify and characterize the components that showed antitumoral activity. Western blot assays and zymography suggests that these proteins do not belong to the class of metallo and serine proteinases. (author)

  10. Studies on Antivenom Activity of Ceiba pentandra Leaves’ Aqueous Methanol Extract Against Echis ocellatus’ Snake Venom

    Directory of Open Access Journals (Sweden)

    sarkiyayi shehu

    2010-10-01

    Full Text Available Aqueous methanol of Ceiba pentandra leaves extract was tested for antivenom activity against Echis ocellatus snake venom. Among parameters investigated include: LD50 of the Echis ocellatus snake venom, phospholipase A2 activity, percentage hemolysis. In vivo analysis of total protein content, white blood cells, pack cell volume and haemoglobin contents were also investigated. The result reveals that Echis ocellatus has an LD50 of 0.280mg/kg ± 0.065. Haemolysis due to venom has drastically reduced by the extract from 66% to 27.4%. suggesting that the extract is effective in reducing haemolysis in mice. The in vivo studies reveals that there were significant (p<0.05 decrease in packed cell volume, total protein and haemoglobin contents for the venom group and there was only slight changes in the venom/extract and control groups suggesting that the extract has some inhibitory effect on the venom activity. The purified phospholipase incubated with the extract demonstrated neutralization effect against the phospholipase A2 activity. The result has shown that Ceiba pentandra leaves extract possess potent snake venom-neutralizing capacity. The plant leaves extract could be use as an antidote for snakebite envenomation.

  11. Effect of bee venom injection on TrkA and TRPV1 expression in the dorsal root ganglion of rats with collagen-induced arthritis%蜂毒对胶原诱导性关节炎炎性痛大鼠背根神经节TrkA、TRPV1的影响

    Institute of Scientific and Technical Information of China (English)

    冼培凤; 陈莹; 杨路; 刘国涛; 彭澎; 王升旭

    2016-01-01

    Objective To investigate the therapeutic effect of acupoint injection of bee venom on collagen-induced arthritis (CIA) in rats and explore the mechanism of bee venom therapy in the treatment of rheumatoid arthritis. Methods Fifteen male Wistar rats were randomly divided into bee venom treatment group (BV group), CIA model group, and control group. In the former two groups, CIA was induced by injections of collagen II+IFA (0.2 mL) via the tail vein, and in the control group, normal saline was injected instead. The rats in BV group received daily injection of 0.1 mL (3 mg/mL) bee venom for 7 consecutive days. All the rats were assessed for paw thickness and arthritis index from days 14 to 21, and the pain threshold was determined on day 21. The expressions of TRPV1 and TrkA in the dorsal root ganglion at the level of L4-6 were detected using immunohistochemistry and Western blotting, respectively. Results The rats in CIA model group started to show paw swelling on day 10, and by day 14, all the rats in this group showed typical signs of CIA. In BV group, the rats receiving been venom therapy for 7 days showed a significantly smaller paw thickness and a low arthritis index than those in the model group. The pain threshold was the highest in the control group and the lowest in the model group. TRPV1-positive cells and TrkA expression in the dorsal root ganglion was significantly reduced in BV group as compared with that in the model group. Conclusions Injection of bee venom can decrease expression of TRPV1 and TrkA in the dorsal root ganglion to produce anti-inflammatory and analgesic effects, suggesting the potential value of bee venom in the treatment of rheumatoid arthritis.%目的:探讨蜂毒对胶原诱导性关节炎(collagen-induced arthritis, CIA)大鼠TrkA、TRPV1疼痛信号分子的影响。方法分为正常对照组、模型组、蜂毒组(BV,3 mg/mL)。采用Wistar雄性成年大鼠,CollagenⅡ+IFA 0.2 mL造模。BV组于造模14 d

  12. Pro and antiinflammatory properties of toxins from animal venoms.

    Science.gov (United States)

    Farsky, Sandra H P; Antunes, Edson; Mello, Suzana B V

    2005-06-01

    Accidents evoked by venomous animals are common in tropical regions. In Brazil, envenomation evoked by snakes, spiders and scorpions are an important public health problem. Their venoms are composed of a great number of toxins, which are capable of acting on tissue and plasma components with consequent toxic and pharmacological effects. On the other hand, the diversity of venom composition makes them important source of toxins that can be employed as scientific tools. Here we describe the mechanisms of anti and pro-inflammatory properties of toxins of Bothrops and Crotalus genus snakes and Loxosceles and Phoneutria genus spider venoms. The emphasis was to summarise, both in vivo and in vitro, studies that focused on the action of phospholipases, metalloproteinases and sphingomyelinase D on vascular and cellular aspects of the process as well as the complex network of chemical mediators involved. PMID:16101549

  13. Analysis of Protein Composition and Bioactivity of Neoponera villosa Venom (Hymenoptera: Formicidae)

    Science.gov (United States)

    Pessoa, Wallace Felipe Blohem; Silva, Ludimilla Carvalho Cerqueira; de Oliveira Dias, Leila; Delabie, Jacques Hubert Charles; Costa, Helena; Romano, Carla Cristina

    2016-01-01

    Ants cause a series of accidents involving humans. Such accidents generate different reactions in the body, ranging from a mild irritation at the bite site to anaphylactic shock, and these reactions depend on the mechanism of action of the venom. The study of animal venom is a science known as venomics. Through venomics, the composition of the venom of several ant species has already been characterized and their biological activities described. Thus, the aim of this study was to evaluate the protein composition and biological activities (hemolytic and immunostimulatory) of the venom of Neoponera villosa (N. villosa), an ant widely distributed in South America. The protein composition was evaluated by proteomic techniques, such as two-dimensional electrophoresis. To assess the biological activity, hemolysis assay was carried out and cytokines were quantified after exposure of macrophages to the venom. The venom of N. villosa has a profile composed of 145 proteins, including structural and metabolic components (e.g., tubulin and ATPase), allergenic and immunomodulatory proteins (arginine kinase and heat shock proteins (HSPs)), protective proteins of venom (superoxide dismutase (SOD) and catalase) and tissue degradation proteins (hyaluronidase and phospholipase A2). The venom was able to induce hemolysis in human erythrocytes and also induced release of both pro-inflammatory cytokines, as the anti-inflammatory cytokine release by murine macrophages. These results allow better understanding of the composition and complexity of N. villosa venom in the human body, as well as the possible mechanisms of action after the bite. PMID:27110765

  14. Analysis of Protein Composition and Bioactivity of Neoponera villosa Venom (Hymenoptera: Formicidae).

    Science.gov (United States)

    Pessoa, Wallace Felipe Blohem; Silva, Ludimilla Carvalho Cerqueira; de Oliveira Dias, Leila; Delabie, Jacques Hubert Charles; Costa, Helena; Romano, Carla Cristina

    2016-01-01

    Ants cause a series of accidents involving humans. Such accidents generate different reactions in the body, ranging from a mild irritation at the bite site to anaphylactic shock, and these reactions depend on the mechanism of action of the venom. The study of animal venom is a science known as venomics. Through venomics, the composition of the venom of several ant species has already been characterized and their biological activities described. Thus, the aim of this study was to evaluate the protein composition and biological activities (hemolytic and immunostimulatory) of the venom of Neoponera villosa (N. villosa), an ant widely distributed in South America. The protein composition was evaluated by proteomic techniques, such as two-dimensional electrophoresis. To assess the biological activity, hemolysis assay was carried out and cytokines were quantified after exposure of macrophages to the venom. The venom of N. villosa has a profile composed of 145 proteins, including structural and metabolic components (e.g., tubulin and ATPase), allergenic and immunomodulatory proteins (arginine kinase and heat shock proteins (HSPs)), protective proteins of venom (superoxide dismutase (SOD) and catalase) and tissue degradation proteins (hyaluronidase and phospholipase A2). The venom was able to induce hemolysis in human erythrocytes and also induced release of both pro-inflammatory cytokines, as the anti-inflammatory cytokine release by murine macrophages. These results allow better understanding of the composition and complexity of N. villosa venom in the human body, as well as the possible mechanisms of action after the bite. PMID:27110765

  15. Partial in vitro analysis of toxic and antigenic activities of eleven Peruvian pitviper snake venoms.

    Science.gov (United States)

    Guerra-Duarte, C; Lopes-Peixoto, J; Fonseca-de-Souza, B R; Stransky, S; Oliveira, D; Schneider, F S; Lopes-de-Souza, L; Bonilla, C; Silva, W; Tintaya, B; Yarleque, A; Chávez-Olórtegui, C

    2015-12-15

    This work used eleven Peruvian snake venoms (Bothrops andianus, Bothrops atrox, Bothrops barnetti, Bothrops castelnaudi, Bothriopsis chloromelas, Bothrocophias microphthalmus, Bothrops neuwiedi, Bothriopsis oligolepis, Bothriopsis peruviana, Bothrops pictus and Bothriopsis taeniata) to perform in vitro experimentation and determine its main characteristics. Hyaluronidase (HYAL), phospholipase A2 (PLA2), snake venom metalloproteinase (SVMP), snake venom serine protease (SVSP) and L-amino acid oxidase (LAAO) activities; toxicity by cell viability assays using MGSO3, VERO and HeLa cell lineages; and crossed immunoreactivity with Peruvian (PAV) and Brazilian (BAV) antibothropic polyvalent antivenoms, through ELISA and Western Blotting assays, were determined. Results show that the activities tested in this study were not similar amongst the venoms and each species present their own peculiarities, highlighting the diversity within Bothrops complex. All venoms were capable of reducing cell viability of all tested lineages. It was also demonstrated the crossed recognition of all tested venoms by both antivenoms. PMID:26365916

  16. Anti-snake venom effect of secodolastane diterpenes isolated from Brazilian marine brown alga Canistrocarpus cervicornis against Lachesis muta venom

    Directory of Open Access Journals (Sweden)

    Thaisa Francielle S. Domingos

    2011-04-01

    Full Text Available The effect of a Brazilian algae extract and also a mixture of two secodolastane diterpenes (linearol/isolinearol that were isolated from the marine brown alga Canistrocarpus cervicornis were evaluated against biological activities of Lachesis muta snake venom. In vitro assays showed that the crude extract and the diterpenes were able to inhibit the clotting and proteolytic activity induced by L. muta crude venom, but not the hemolytic activity. However, only the diterpenes inhibited the hemolysis caused by a purified phospholipase A2 previously isolated from L. muta venom, denoted LM-PLA2-I. Interestingly, the crude algal extract and the diterpenes were able to protect mice from hemorrhage induced by L. muta venom. Thus, we may conclude that marine algae are rich and powerful sources of molecules that may be used against L. muta accidents in order to improve treatment of envenomation by this snake.

  17. Secretory phospholipase A2 potentiates glutamate-induced rat striatal neuronal cell death in vivo

    DEFF Research Database (Denmark)

    Kolko, M; Bruhn, T; Christensen, Thomas; Lazdunski, M; Lambeau, G; Bazan, N G; Diemer, Nils Henrik

    1999-01-01

    The secretory phospholipases A2 (sPLA2) OS2 (10, 20 and 50 pmol) or OS1, (50 pmol) purified from taipan snake Oxyuranus scutellatus scutellatus venom, and the excitatory amino acid glutamate (Glu) (2.5 and 5.0 micromol) were injected into the right striatum of male Wistar rats. Injection of 10 an...

  18. Combined snake venomics and venom gland transcriptomic analysis of the ocellated carpet viper, Echis ocellatus.

    Science.gov (United States)

    Wagstaff, Simon C; Sanz, Libia; Juárez, Paula; Harrison, Robert A; Calvete, Juan J

    2009-01-30

    Snakebite in Africa causes thousands of deaths annually and considerable permanent physical disability. The saw-scaled viper, Echis ocellatus, represents the single most medically important snake species in West Africa. To provide a detailed compositional analysis of the venom of E. ocellatus for designing novel toxin-specific immunotherapy and to delineate sequence structure-function relationships of individual toxins, we characterised the venom proteome and the venom gland transcriptome. Whole E. ocellatus venom was fractionated by reverse-phase HPLC, followed by analysis of each chromatographic fraction using a combination of SDS-PAGE, N-terminal sequencing, MALDI-TOF mass fingerprinting, and CID-MS/MS of tryptic peptides. This analysis identified around 35 distinct proteins of molecular masses in the range of 5.5-110 kDa belonging to 8 different toxin families (disintegrin, DC-fragment, phospholipase A(2), cysteine-rich secretory protein, serine proteinase, C-type lectin, l-amino acid oxidase, and Zn(2+)-dependent metalloprotease). Comparison of the toxin composition of E. ocellatus venom determined using a proteomic approach, with the predicted proteome derived from assembly of 1000 EST sequences from a E. ocellatus venom gland cDNA library, shows some differences. Most notably, peptides derived from 26% of the venom proteins could not be ascribed an exact match in the transcriptome. Similarly, 64 (67%) out of the 95 putative toxin clusters reported in the transcriptome did not match to peptides detected in the venom proteome. These data suggest that the final composition of venom is influenced by transcriptional and post-translational mechanisms that may be more complex than previously appreciated. This, in turn, emphasises the value of combining proteomic and transcriptomic approaches to acquire a more complete understanding of the precise composition of snake venom, than would be gleaned from using one analysis alone. From a clinical perspective, the large

  19. 468 Urticarial Vasculitis After Bee-sting Therapy

    OpenAIRE

    Lee, June-Hyuk; Park, Sung Woo; Jang, An-Soo; Kim, DoJin; Park, Choon-Sik

    2012-01-01

    Background Bee-sting therapy is one of the oriental traditional medical therapies. Some chemical components of bee venom have been known to have anti-inflammatory effects. Recently, traditional therapists use one chemical component (e.g. Apitoxin) for injection therapy using a syringe, instead of sting method with bee itself as to be known traditional method. 31-year-old woman had a lower back pain because of mild HIVD in lumbar spine for 5 months. She had bee-sting therapies for several time...

  20. 鞘内注射孤啡肽对大鼠足底注入蜜蜂毒诱致长时程自发痛、痛敏和炎症的不同效果%Differential actions of intrathecal nociceptin on persistent spontaneous nociception, hyperalgesia and inflammation produced by subcutaneous bee venom injection in conscious rats

    Institute of Scientific and Technical Information of China (English)

    孙焱芫; 罗层; 李震; 陈军

    2004-01-01

    为进一步了解孤啡肽在脊髓水平是否具有抗伤害及抗炎作用,本实验在具有多种痛行为表现的蜜蜂毒模型上观察了鞘内注射孤啡肽对大鼠一侧后足底注入蜜蜂毒所诱致的同侧自发缩足反射、原发热和机械性痛敏以及注射部位炎症反应的影响,同时观察了新的高选择性孤啡肽受体拮抗剂CompB的作用.结果表明:与生理盐水对照组比较,鞘内注射孤啡肽(3、10、30 nmol/10μl)对蜜蜂毒诱发的自发缩足反射次数的抑制作用随剂量提高而增大,抑制率分别为37±7,43±6and57±11%(三个剂量vs对照,P<0.05);而对蜜蜂毒诱发的注射部位炎症反应(爪体积、爪背腹厚度和蛋白渗出的增加)无显著影响.CompB(30 nmo1)可完全翻转10 nmol孤啡肽对自发缩足反射的抑制作用.鞘内单次或重复注射孤啡肽(10 nmol/10μl)对蜜蜂毒诱致的原发性热和机械性痛敏的发生和维持均无作用.本实验结果提示,外源性孤啡肽在脊髓通过孤啡肽受体的介导产生一定的镇痛作用,但是它可能仅对持续性自发痛有抑制作用,而对热和机械性痛敏及炎症反应均无影响.%Nociceptin is an endogenous ligand for the opioid receptor-like 1 (ORL1) receptor. The present study was designed to investigate spinal actions of nociceptin on the spontaneous nociception, hyperalgesia and inflammation induced by subcutaneous bee venom injection.Subcutaneous injection of bee venom into one hindpaw of conscious rat produced a persistent spontaneous nociception followed by a longlasting primary heat and mechanical hyperalgesia as well as local inflammation. Compared with the pre-saline group, pretreatment with intrathecal injection of three doses (3, 10 and 30 nmol) of nociceptin produced significant suppression on the spontaneous paw flinching reflex.The inhibitory rates were 37 ± 7, 43±6 and 57 ± 11%, respectively, which were enhanced with an increase in the concentration of nociceptin

  1. Comparative proteomic analysis of two wasps venom, Vespa tropica and Vespa affinis.

    Science.gov (United States)

    Rungsa, Prapenpuksiri; Incamnoi, Paroonkorn; Sukprasert, Sophida; Uawonggul, Nunthawun; Klaynongsruang, Sompong; Daduang, Jureerut; Patramanon, Rina; Roytrakul, Sittiruk; Daduang, Sakda

    2016-09-01

    Vespid venom is composed of many bioactive compounds. The venom of the banded tiger wasp (Vespa affinis, or VA) and the great banded wasp (Vespa tropica, or VT)-which are locally found in the northeastern part of Thailand and are well known for their life-threatening venom potency-were comparatively studied in terms of potency, composition and biological activity. Clinical studies that included word-of-mouth information shared by traditional healers in local areas noted that the venom of VT is more potent than that of VA. Our previous study showed that the venom of VA is lower in potency (PD50 = 12.5 μg/g body weight) than that of VT (PD50 = 3 μg/g body weight). Analysis with the PAGE technique showed that these two venoms showed similar patterns of active proteins. Most protein spots were basic proteins at an isoelectric point (pI) ranging from 5 to 10, with molecular weights between 27 and 50 kDa. These spots were identified as hyaluronidase, phospholipase, antigen 5, dipeptidyl peptidase and albumin-like protein. The proportion of hyaluronidase was 2.5 times higher in VT than in VA. VT also showed higher hyaluronidase, phospholipase and dipeptidyl peptidase activities, suggesting that these components made VT venom more potent than VA venom. PMID:27288895

  2. A Lys49 Phospholipase A2, Isolated from Bothrops asper Snake Venom, Induces Lipid Droplet Formation in Macrophages Which Depends on Distinct Signaling Pathways and the C-Terminal Region

    Directory of Open Access Journals (Sweden)

    Karina Cristina Giannotti

    2013-01-01

    Full Text Available MT-II, a Lys49PLA2 homologue devoid of catalytic activity from B. asper venom, stimulates inflammatory events in macrophages. We investigated the ability of MT-II to induce formation of lipid droplets (LDs, key elements of inflammatory responses, in isolated macrophages and participation of protein kinases and intracellular PLA2s in this effect. Influence of MT-II on PLIN2 recruitment and expression was assessed, and the effects of some synthetic peptides on LD formation were further evaluated. At noncytotoxic concentrations, MT-II directly activated macrophages to form LDs. This effect was reproduced by a synthetic peptide corresponding to the C-terminal sequence 115–129 of MT-II, evidencing the critical role of C-terminus for MT-II-induced effect. Moreover, MT-II induced expression and recruitment of PLIN2. Pharmacological interventions with specific inhibitors showed that PKC, PI3K, ERK1/2, and iPLA2, but not P38MAPK or cPLA2, signaling pathways are involved in LD formation induced by MT-II. This sPLA2 homologue also induced synthesis of PGE2 that colocalized to LDs. In conclusion, MT-II is able to induce formation of LDs committed to PGE2 formation in a process dependent on C-terminal loop engagement and regulated by distinct protein kinases and iPLA2. LDs may constitute an important inflammatory mechanism triggered by MT-II in macrophages.

  3. Use of snake venom fractions in the coagulation laboratory.

    Science.gov (United States)

    Marsh, N A

    1998-07-01

    Snake venom toxins are now regularly used in the coagulation laboratory for assaying haemostatic parameters and as coagulation reagents. Snake venom thrombin-like enzymes (SVTLE) are used for fibrinogen and fibrinogen breakdown product assay as well as detecting dysfibrinogenaemias. Significantly, because SVTLE are not inhibited by heparin, they can be used for defibrinating samples that contain the anticoagulant before assay of haemostatic variables. Prothrombin activators are found in many snake venoms and are used in prothrombin assays, for studying dysprothrombinaemias and preparing meizothrombin and non-enzymic prothrombin. Russell's viper (Daboia russelli) venom (RVV) contains a number of compounds useful in the assay of factors V, VII, X, platelet factor 3 and lupus anticoagulants. Activators from the taipan, Australian brown snake and saw-scaled viper have been used to assay lupus anticoagulants. Protein C and activated protein C resistance can be measured by means of RVV and Protac, a fast acting inhibitor from Southern copperhead snake venom and von Willebrand factor can be studied with Botrocetin from Bothrops jararaca venom. Finally, phospholipase A2 enzymes and the disintegrins, a family of Arg-Gly-Asp (RGD)-containing proteins found in snake venoms, show great potential for the study of haemostasis including, notably, platelet glycoprotein receptors GPIIb/IIIa and Ib. PMID:9712287

  4. Toxins from Crotalus durissus terrificus venom

    International Nuclear Information System (INIS)

    Phospholipase A, crotapotin and crotamine were purified from the venom of crotalus durissus terrificus. Molecular weigths were respectively estimated in 13400, 8300 and 4880. By sephadex gel filtration, stable complex is formed by interaction (1:1 molar ratio) of Phospholipase A (LD=0,55mg/Kg, in mice) and crotapotin, obtaining an increase in the toxicity of Phospholipase A in 10 fold to LD50=0,05mg/Kg. These facts indicate crotoxin as a product of 1:1 molar ratio interaction of crotapotin and Phospholipase A. By sephadex gel filtration an unstable complex is formed by interaction of crotapotin and crotamine (LD50=0,8mg/Kg, in mice), increasing the toxicity of crotamine approximately 4 fold to LD50=0,2mg/Kg. In tritium-hydrogen exchange experiments, the back exchange kinetic of these tritium labelled proteins were measured in gel filtration columns of sephadex G 25 'coarse' showing for Phospholipase A two clearly distinguishable kinetic classes of exchangeable hydrogens. From the exchangeable hydrogens only 68% were rapidly exchanged and the occurrence of hydrogens envolved in alpha-helix was practically absent. Crotapotin has no hydrogens of alpha-helix and 83% of exchangeable hydrogens were rapidly exchanged with solvent. Crotamine, after a initial heating in tritiated water showed that 31% of exchangeable hydrogens were slowly exchanged with solvent. After 18 hours of heating, that number diminished for 11%. Crotoxin showed three exponential classes of exchangeable hydrogens and about 26 protons have alpha-helix characteristic exchange rate. A possible conformational change after Phospholipase A - crotapotin interaction is suggested. (Author)

  5. Neuromuscular action of venom from the South American colubrid snake Philodryas patagoniensis.

    Science.gov (United States)

    Carreiro da Costa, Roberta S; Prudêncio, Luiz; Ferrari, Erika Fonseca; Souza, Gustavo H M F; de Mello, Sueli Moreira; Prianti Júnior, Antonio Carlos Guimarães; Ribeiro, Wellington; Zamunér, Stella Regina; Hyslop, Stephen; Cogo, José Carlos

    2008-07-01

    Snakes of the opisthoglyphous genus Philodryas are widespread in South America and cause most bites by colubrids in this region. In this study, we examined the neurotoxic and myotoxic effects of venom from Philodryas patagoniensis in biventer cervicis and phrenic nerve-diaphragm preparations and we compared the biochemical activities of venoms from P. patagoniensis and Philodryas olfersii. Philodryas patagoniensis venom (40 microg/mL) had no effect on mouse phrenic nerve-diaphragm preparations but caused time-dependent neuromuscular blockade of chick biventer cervicis preparations. This blockade was not reversed by washing. The highest concentration of venom tested (40 microg/mL) significantly reduced (pPhilodryas venoms had low esterase and phospholipase A(2) but high proteolytic activities compared to the pitviper Bothrops jararaca. SDS-PAGE showed that the Philodryas venoms had similar electrophoretic profiles, with most proteins having a molecular mass of 25-80 kDa. Both of the Philodryas venoms cross-reacted with bothropic antivenom in ELISA, indicating the presence of proteins immunologically related to Bothrops venoms. RP-HPLC of P. patagoniensis venom yielded four major peaks, each of which contained several proteins, as shown by SDS-PAGE. These results indicate that P. patagoniensis venom has neurotoxic and myotoxic components that may contribute to the effects of envenoming by this species. PMID:18455482

  6. Clonaje y caracterización molecular in silico de un transcrito de fosfolipasa A2 aislado del veneno de la serpiente peruana Lachesis muta Molecular cloning and characterization in silico of phospholipase A2 transcripto isolated from Lachesis muta peruvian snake venom

    Directory of Open Access Journals (Sweden)

    Karim L. Jimenez

    2010-12-01

    Full Text Available Objetivo. Aislar y caracterizar in silico un transcrito del gen de fosfolipasa A2 (PLA2 aislado del veneno de Lachesis muta de la Amazonía peruana. Materiales y métodos. Se amplificó el transcrito del gen sPLA2 mediante la técnica de RT-PCR a partir de RNA total utilizando cebadores específicos, el producto de DNA amplificado se insertó en el vector pGEM para su posterior secuenciación. Mediante análisis bioinformático de la secuencia nucleotídica se determinó un marco de lectura abierta de 414 nucleótidos que codifica 138 aminoácidos, incluyendo16 aminoácidos del péptido señal, el peso molecular y el pI fueron de 13 976 kDa y 5,66 respectivamente. Resultados. La secuencia aminoacídica denominada Lm-PLA2- Perú, contiene Asp49, así como Tyr-28, Gly-30, Gly-32, His-48, Tyr52, Asp99 importantes para la actividad enzimática. La comparación de Lm-PLA2-Perú con las secuencias aminoacídicas de los bancos de datos mostró 93% de similitud con las sPLA2 de Lachesis stenophrys y más del 80% con otras sPLA2 de venenos de la familia Viperidae. El análisis filogenético de la secuencia nucleotídica del transcrito del gen sPLA2 indica que Lm-PLA2-Perú se agrupa con otras sPLA2 [Asp49] ácidas previamente aisladas del veneno de Bothriechis schlegelii con un 89% de identidad. El modelaje tridimensional de Lm-PLA2-Perú, presenta una estructura característica de sPLA2 del Grupo II formada por tres hélices-α, una lámina-β, una hélice corta y un lazo de unión con calcio. Conclusión. La secuencia nucleotídica corresponde al primer transcripto del gen de PLA2 clonado a partir del veneno de la serpiente Lachesis muta, que habita en la selva del Perú.Objective. Isolate and characterize in silico gene phospholipase A2 (PLA2 isolated from Lachesis muta venom of the Peruvian Amazon. Material and methods. Technique RT-PCR from total RNA was using specific primers, the amplified DNA product was inserted into the pGEM vector for

  7. Hymenoptera allergens: from venom to "venome".

    Science.gov (United States)

    Spillner, Edzard; Blank, Simon; Jakob, Thilo

    2014-01-01

    In Western Europe, Hymenoptera venom allergy (HVA) primarily relates to venoms of the honeybee and the common yellow jacket. In contrast to other allergen sources, only a few major components of Hymenoptera venoms had been characterized until recently. Improved expression systems and proteomic detection strategies have allowed the identification and characterization of a wide range of additional allergens. The field of HVA research has moved rapidly from focusing on venom extract and single major allergens to a molecular understanding of the entire "venome" as a system of unique and characteristic components. An increasing number of such components has been identified, characterized regarding function, and assessed for allergenic potential. Moreover, advanced expression strategies for recombinant production of venom allergens allow selective modification of molecules and provide insight into different types of immunoglobulin E reactivities and sensitization patterns. The obtained information contributes to an increased diagnostic precision in HVA and may serve for monitoring, re-evaluation, and improvement of current therapeutic strategies. PMID:24616722

  8. ELISA for the detection of toxic antigens in experimental and clinical envenoming by Tityus serrulatus scorpion venom.

    Science.gov (United States)

    Chávez-Olórtegui, C; Fonseca, S C; Campolina, D; Amaral, C F; Diniz, C R

    1994-12-01

    An ELISA was developed for identification of circulating toxic antigens from Tityus serrulatus scorpion venom. The toxic fraction from the scorpion venom was purified by Sephadex G-50 chromatography and immunoaffinity techniques were used for identifying antibodies that reacted with this fraction. These antibodies were used to develop a sandwich-type ELISA. The specificity of the assay was demonstrated by its capacity for identifying mice that were experimentally inoculated with T. serrulatus venom from those inoculated with Phoneutria nigriventer spider venom, Apis mellifera bee venom and Bothrops atrox, Crotalus durissus terrificus, Lachesis muta muta and Micrurus frontalis snake venoms. Measurable absorbance signals were obtained with 0.1 ng of venom per assay. The ELISA also detected antigens in the sera of patients systemically envenomed by T. serrulatus. Therefore, this ELISA could be a valuable tool for clinicians and epidemiologists, owing to its sensitivity and specificity. PMID:7725332

  9. Age-related biological activity of South American rattlesnake (Crotalus durissus terrificus venom

    Directory of Open Access Journals (Sweden)

    M. F. D. Furtado

    2003-01-01

    Full Text Available An in vitro and in vivo comparative study was performed on the effects of Crotalus durissus terrificus venoms from a mother and its 15 newborns. The venoms were tested for protein content, lethality, proteolytic, myotoxic, hemorrhagic, and phospholipase A2 activity. The minimum coagulant dose in plasma and human fibrinogen, protrhombin, and Factor II activations were analyzed. The venoms were also analyzed by polyacrylamide gel electrophoresis (PAGE. This showed that despite similar total protein content, the biological effects of the venoms were different. Venom from young snakes exhibited higher enzymatic and coagulant activities and higher myotoxicity compared to the mother’s. In addition, the PLA2 content paralleled myotoxicity. However, no difference could be detected in their toxicity (LD50 0.08 mg/Kg. High incidence of blood coagulation disorders and elevated circulating myoglobin may characterize systemic envenoming by young C. d. terrificus.

  10. Effects of Animal Venoms and Toxins on Hallmarks of Cancer

    Science.gov (United States)

    Chaisakul, Janeyuth; Hodgson, Wayne C.; Kuruppu, Sanjaya; Prasongsook, Naiyarat

    2016-01-01

    Animal venoms are a cocktail of proteins and peptides, targeting vital physiological processes. Venoms have evolved to assist in the capture and digestion of prey. Key venom components often include neurotoxins, myotoxins, cardiotoxins, hematoxins and catalytic enzymes. The pharmacological activities of venom components have been investigated as a source of potential therapeutic agents. Interestingly, a number of animal toxins display profound anticancer effects. These include toxins purified from snake, bee and scorpion venoms effecting cancer cell proliferation, migration, invasion, apoptotic activity and neovascularization. Indeed, the mechanism behind the anticancer effect of certain toxins is similar to that of agents currently used in chemotherapy. For example, Lebein is a snake venom disintegrin which generates anti-angiogenic effects by inhibiting vascular endothelial growth factors (VEGF). In this review article, we highlight the biological activities of animal toxins on the multiple steps of tumour formation or hallmarks of cancer. We also discuss recent progress in the discovery of lead compounds for anticancer drug development from venom components. PMID:27471574

  11. Effects of Animal Venoms and Toxins on Hallmarks of Cancer.

    Science.gov (United States)

    Chaisakul, Janeyuth; Hodgson, Wayne C; Kuruppu, Sanjaya; Prasongsook, Naiyarat

    2016-01-01

    Animal venoms are a cocktail of proteins and peptides, targeting vital physiological processes. Venoms have evolved to assist in the capture and digestion of prey. Key venom components often include neurotoxins, myotoxins, cardiotoxins, hematoxins and catalytic enzymes. The pharmacological activities of venom components have been investigated as a source of potential therapeutic agents. Interestingly, a number of animal toxins display profound anticancer effects. These include toxins purified from snake, bee and scorpion venoms effecting cancer cell proliferation, migration, invasion, apoptotic activity and neovascularization. Indeed, the mechanism behind the anticancer effect of certain toxins is similar to that of agents currently used in chemotherapy. For example, Lebein is a snake venom disintegrin which generates anti-angiogenic effects by inhibiting vascular endothelial growth factors (VEGF). In this review article, we highlight the biological activities of animal toxins on the multiple steps of tumour formation or hallmarks of cancer. We also discuss recent progress in the discovery of lead compounds for anticancer drug development from venom components. PMID:27471574

  12. A comparative study of venomics of Naja naja from India and Sri Lanka, clinical manifestations and antivenomics of an Indian polyspecific antivenom.

    Science.gov (United States)

    Sintiprungrat, Kitisak; Watcharatanyatip, Kamolwan; Senevirathne, W D S T; Chaisuriya, Papada; Chokchaichamnankit, Daranee; Srisomsap, Chantragan; Ratanabanangkoon, Kavi

    2016-01-30

    Naja naja (Indian cobra) from Sri Lanka and India is the WHO Category 1 medically important snakes in both countries. Some antivenom produced against Indian N. naja (NNi) were less effective against Sri Lankan N. naja (NNsl). Proteomes of NNi and NNsl venoms were studied by RP-HPLC, SDS-PAGE and LC/MS/MS. Six protein families were identified in both venoms with the most abundant were the 3 finger toxins (3FTs) where cytotoxins (CTX) subtype predominated, followed by phospholipase A2, cysteine-rich venom protein, snake venom metalloproteases, venom growth factors, and protease inhibitors. Qualitative and quantitative differences in the venomics profiles were observed. Some proteins were isolated from either NNi or NNsl venom. Postsynaptic neurotoxins (NTX) were identified for the first time in NNsl venom. Thus, there are geographic intra-specific variations of venom composition of the two N. naja. The relative abundance of CTX and NTX explained well the clinical manifestations of these venoms. Antivenomics study of an Indian antivenom (Vins) showed the antibodies effectively bound all venom toxins from both snakes but more avidly to the Indian venom proteins. The lower antibody affinity towards the 'heterologous' venom was the likely cause of poor efficacy of the Indian antivenom used to treat NNsl envenoming. PMID:26506536

  13. Lonomia obliqua venomous secretion induces human platelet adhesion and aggregation.

    Science.gov (United States)

    Berger, Markus; Reck, José; Terra, Renata M S; Beys da Silva, Walter O; Santi, Lucélia; Pinto, Antônio F M; Vainstein, Marilene H; Termignoni, Carlos; Guimarães, Jorge A

    2010-10-01

    The caterpillar Lonomia obliqua is a venomous animal that causes numerous accidents, especially in southern Brazil, where it is considered a public health problem. The clinical manifestations include several haemostatic disturbances that lead to a hemorrhagic syndrome. Considering that platelets play a central role in hemostasis, in this work we investigate the effects of L. obliqua venomous secretion upon blood platelets responses in vitro. Results obtained shows that L. obliqua venom directly induces aggregation and ATP secretion in human washed platelets in a dose-dependent manner. Electron microscopy studies clearly showed that the venomous bristle extract was also able to produce direct platelets shape change and adhesion as well as activation and formation of platelet aggregates. Differently from other enzyme inhibitors, the venom-induced platelet aggregation was significatively inhibited by p-bromophenacyl bromide, a specific inhibitor of phospholipases A2. Additional experiments with different pharmacological antagonists indicate that the aggregation response triggered by the venom active components occurs through a calcium-dependent mechanism involving arachidonic acid metabolite(s) of the cyclooxygenase pathway and activation of phosphodiesterase 3A, an enzyme that leads to the consumption of intracellular cAMP content. It was additionally found that L. obliqua-induced platelet aggregation was independent of ADP release. Altogether, these findings are in line with the need for a better understanding of the complex hemorrhagic syndrome resulting from the envenomation caused by L. obliqua caterpillars, and can also give new insights into the management of its clinical profile. PMID:20157842

  14. Synergy by secretory phospholipase A2 and glutamate on inducing cell death and sustained arachidonic acid metabolic changes in primary cortical neuronal cultures

    DEFF Research Database (Denmark)

    Kolko, M; DeCoster, M A; de Turco, E B;

    1996-01-01

    glutamate and sPLA2 from bee venom. sPLA2, at concentrations eliciting low neurotoxicity (venom. The NMDA receptor antagonist MK-801 blocked glutamate effects and partially inhibited sPLA2 OS2 but not sPLA2 from bee venom-induced arachidonic acid release. Thus, the synergy with glutamate and very low concentrations of exogenously added sPLA2 suggests a potential role for...

  15. 蜂毒蜜点涂佐治小儿急性细菌性扁桃体炎的疗效与安全性%The efficacy and safety of the adjuvant Treatment of the children with acute bacterial tonsillitis by pointing the Honey Bee Venom

    Institute of Scientific and Technical Information of China (English)

    杨俊莉; 成永明; 邓庭超; 朱锦妍; 洁珍; 黄晨娟

    2014-01-01

    目的:评价蜂毒蜜点涂佐治小儿急性细菌性扁桃体炎的临床疗效与安全性。方法:将符合本方案入选条件的患儿125例,随机分成治疗组和对照组,其中治疗组为64例,对照组为61例。治疗组在口服头孢克洛颗粒的基础上,用蜂毒蜜1ml点涂咽部两侧与双侧扁桃体,每天2次,疗程5d;对照组仅口服头孢克洛颗粒,不用蜂毒蜜点涂,疗程相同。结果:治疗组48小时退热率为73.4%,总有效率为100%,不良反应率为3.1%。对照组48小时退热率为55.7%,总有效率为90.2%,不良反应率为1.6%。经统计学处理:两组临床疗效有显著性差异(P0.05)。结论:蜂毒蜜点涂佐治小儿急性细菌性扁桃体炎安全、有效,易于被患儿接受。%Objective:To assess the efficacy and safety of the adjuvant treatment of the children with acute bacterial tonsillitis by pointing the honey bee Venom. Methods:To divide 125 patients into two groups randomly-the treatment group (sixty four) and the control group (sixty one). On the basis of oral cefaclor granules,the treatment group were pointed on the pharynx and bilateral amygdala with the one milliliter of the honey bee venom, twice a day for five days, and control group only with oral cefaclor particles for five days. Results: The treatment group showed antipyretic rate of 73.4% within 48 hours and the total effective rate was 100% with the rate of adverse events of 3.1%. The control group showed antipyretic rate of 55.7% within 48 hours, the total effective rate was 90.2%, the incidence rate of adverse events of 1.6%; After the statistics treatment, the significant difference was seen between the two groups in the antipyretic rate within 48 hours and clinical curative effect (P0.05).Conclusion: The adjuvant treatment with pointing honey bee venom was safe, effective, and easily acceptant in the children with acute bacterial tonsillitis.

  16. Effects of Bee Venom Acupuncture on the Grades of Syndromes and Hemorheology on Joint Pain Identified as Wind-cold Pattern%蜂针疗法对风湿寒性关节痛患者中医证候评分及血液流变学的影响

    Institute of Scientific and Technical Information of China (English)

    黄胜光; 陈辉; 周汝云; 于聪; 谭宁; 朱辉军; 廖康汉; 罗晓光

    2012-01-01

    Objective: To observe the clinical curative effect on rheumatism joint pain by bee venom acupuncture; to explore and evaluate the mechanism from the perspective of grade of TCM symptom and hemorheology. Methods: 60 cases of patients, consistent with inclusion criteria, were randomly divided into treatment group (n=30) and control group (n=30). Patients in the treatment group are treated by bee venom acupuncture and the patients in control group were treated by daphne capsules. The grades of TCM syndrome and hemorheology were observed before and after the treatment. Results: The total curative effects of treatment group and contrastive group are 100% and 87.0% respectively. There are marked differences between the two groups (P<0.05). In both two groups, compared with before, there were statistical difference in grades of TCM syndrome and hemorheology(P<0.01); and the improvement of the treatment was better than that of the control group(P<0.01). Conclusion: Bee venom acupuncture is a kind of effective and safe remedy for the patients with rheumatic joint pain to improve their index of TCM symptom and hemorheology; the effect is better than that of the daphne capsules.%目的:观察蜂钎疗法治疗风温寒性关节痛的临床疗效,从中医证候评分及血液流变学两方面进行评价并探讨其作用机理.方法:入选60例符合纳入标准的患者,随机分为治疗组和对照组各30例,分别予蜂针和口服祖师麻片治疗,观察治疗前后中医证候评分、血液流变学的变化.结果:总有效率治疗组为100%,对照组为86.7%,两组比较,差异有统计学意义(P<0.01);治疗后两组患者中医证候评分、血液流变学与治疗前比较,差异均有统计学意义(P<0.01);且治疗组明显优于对照组(P<0.01).结论:蜂针疗法可明显改善风湿寒性关节痛患者的中医证候评分和血液流变学指标,对风湿寒性关节痛疗效明显优于祖师麻片.

  17. Venoms of Heteropteran Insects: A Treasure Trove of Diverse Pharmacological Toolkits.

    Science.gov (United States)

    Walker, Andrew A; Weirauch, Christiane; Fry, Bryan G; King, Glenn F

    2016-02-01

    The piercing-sucking mouthparts of the true bugs (Insecta: Hemiptera: Heteroptera) have allowed diversification from a plant-feeding ancestor into a wide range of trophic strategies that include predation and blood-feeding. Crucial to the success of each of these strategies is the injection of venom. Here we review the current state of knowledge with regard to heteropteran venoms. Predaceous species produce venoms that induce rapid paralysis and liquefaction. These venoms are powerfully insecticidal, and may cause paralysis or death when injected into vertebrates. Disulfide-rich peptides, bioactive phospholipids, small molecules such as N,N-dimethylaniline and 1,2,5-trithiepane, and toxic enzymes such as phospholipase A2, have been reported in predatory venoms. However, the detailed composition and molecular targets of predatory venoms are largely unknown. In contrast, recent research into blood-feeding heteropterans has revealed the structure and function of many protein and non-protein components that facilitate acquisition of blood meals. Blood-feeding venoms lack paralytic or liquefying activity but instead are cocktails of pharmacological modulators that disable the host haemostatic systems simultaneously at multiple points. The multiple ways venom is used by heteropterans suggests that further study will reveal heteropteran venom components with a wide range of bioactivities that may be recruited for use as bioinsecticides, human therapeutics, and pharmacological tools. PMID:26907342

  18. Venoms of Heteropteran Insects: A Treasure Trove of Diverse Pharmacological Toolkits

    Directory of Open Access Journals (Sweden)

    Andrew A. Walker

    2016-02-01

    Full Text Available The piercing-sucking mouthparts of the true bugs (Insecta: Hemiptera: Heteroptera have allowed diversification from a plant-feeding ancestor into a wide range of trophic strategies that include predation and blood-feeding. Crucial to the success of each of these strategies is the injection of venom. Here we review the current state of knowledge with regard to heteropteran venoms. Predaceous species produce venoms that induce rapid paralysis and liquefaction. These venoms are powerfully insecticidal, and may cause paralysis or death when injected into vertebrates. Disulfide-rich peptides, bioactive phospholipids, small molecules such as N,N-dimethylaniline and 1,2,5-trithiepane, and toxic enzymes such as phospholipase A2, have been reported in predatory venoms. However, the detailed composition and molecular targets of predatory venoms are largely unknown. In contrast, recent research into blood-feeding heteropterans has revealed the structure and function of many protein and non-protein components that facilitate acquisition of blood meals. Blood-feeding venoms lack paralytic or liquefying activity but instead are cocktails of pharmacological modulators that disable the host haemostatic systems simultaneously at multiple points. The multiple ways venom is used by heteropterans suggests that further study will reveal heteropteran venom components with a wide range of bioactivities that may be recruited for use as bioinsecticides, human therapeutics, and pharmacological tools.

  19. THERAPEUTIC ACTIVITY OF BEE-STINGS THERAPY IN RHEUMATOID ARTHRITIS CAUSES INFLAMMATION AND OXIDATIVE STRESS IN FEMALE PATIENTS

    Directory of Open Access Journals (Sweden)

    Abdel-Rahman M.

    2013-06-01

    Full Text Available Here the present study aimed to evaluate the therapeutic activity of bee venom acupuncture in rheumatoid arthritis (RA which causes inflammation and oxidative stress in female patients. 75 female patients were divided into 5 groups as control, bee venom acupuncture, rheumatoid arthritis, treated rheumatoid arthritis and rheumatoid arthritis stung with bee venom groups. Serum rheumatoid factor, erythrocyte sedimentation rate, C-reactive protein, prostaglandins E2 and F2α, lipid peroxidation, nitric oxide, glutathione and total antioxidant capacity levels were determined in all groups. Rheumatoid arthritis in female patients was resulted in a significant elevation in serum rheumatoid factor, erythrocyte sedimentation rate, C-reactive protein, prostaglandins E2 and F2α, lipid peroxidation and nitric oxide levels (p < 0.05 compared to control group. In addition, rheumatoid arthritis caused a significant reduction in serum glutathione and total antioxidant capacity levels. On the other hand, bee venom stings alleviated rheumatoid arthritis inflammation and oxidative stress effects, where all investigated parameters were statistically significant compared to rheumatoid arthritis group. Moreover, bee venom therapy was more potent than the routine treatment of rheumatoid arthritis in patients treated group. Bee venom acupuncture in RA patient may have therapeutic, anti-inflammatory and antioxidant activities.

  20. Venomics of the Australian eastern brown snake (Pseudonaja textilis): Detection of new venom proteins and splicing variants.

    Science.gov (United States)

    Viala, Vincent Louis; Hildebrand, Diana; Trusch, Maria; Fucase, Tamara Mieco; Sciani, Juliana Mozer; Pimenta, Daniel Carvalho; Arni, Raghuvir K; Schlüter, Hartmut; Betzel, Christian; Mirtschin, Peter; Dunstan, Nathan; Spencer, Patrick Jack

    2015-12-01

    The eastern brown snake is the predominant cause of snakebites in mainland Australia. Its venom induces defibrination coagulopathy, renal failure and microangiopathic hemolytic anemia. Cardiovascular collapse has been described as an early cause of death in patients, but, so far, the mechanisms involved have not been fully identified. In the present work, we analysed the venome of Pseudonaja textilis by combining high throughput proteomics and transcriptomics, aiming to further characterize the components of this venom. The combination of these techniques in the analysis and identification of toxins, venom proteins and putative toxins allowed the sequence description and the identification of the following: prothrombinase coagulation factors, neurotoxic textilotoxin phospholipase A2 (PLA2) subunits and "acidic PLA2", three-finger toxins (3FTx) and the Kunitz-type protease inhibitor textilinin, venom metalloproteinase, C-type lectins, cysteine rich secretory proteins, calreticulin, dipeptidase 2, as well as evidences of Heloderma lizard peptides. Deep data-mining analysis revealed the secretion of a new transcript variant of venom coagulation factor 5a and the existence of a splicing variant of PLA2 modifying the UTR and signal peptide from a same mature protein. The transcriptome revealed the diversity of transcripts and mutations, and also indicates that splicing variants can be an important source of toxin variation. PMID:26079951

  1. Bee health

    DEFF Research Database (Denmark)

    Lecocq, Antoine

    with a queen bee, based on their health status. Some of the methodological novelty, set-backs and preliminary results are discussed. In the fourth part, the thesis concludes by zooming out of the confines of the inner hive in order to address recent concerns regarding the potential spill-over of honey bee...

  2. HYMENOPTERA ALLERGENS: FROM VENOM TO VENOME

    Directory of Open Access Journals (Sweden)

    Edzard eSpillner

    2014-02-01

    Full Text Available In Western Europe hymenoptera venom allergy primarily relates to venoms of the honeybee and the common yellow jacket. In contrast to other allergen sources, only a few major components of hymenoptera venoms had been characterized until recently. Improved expression systems and proteomic detection strategies have allowed the identification and characterization of a wide range of additional allergens. The field of hymenoptera venom allergy research has moved rapidly from focusing on venom extract and single major allergens to a molecular understanding of the entire venome as a system of unique and characteristic components. An increasing number of such components has been identified, characterized regarding function and assessed for allergenic potential. Moreover, advanced expression strategies for recombinant production of venom allergens allow selective modification of molecules and provide insight into different types of IgE reactivities and sensitization patterns. The obtained information contributes to an increased diagnostic precision in hymenoptera venom allergy and may serve for monitoring, reevaluation and improvement of current therapeutic strategies.

  3. Deaths From Bites and Stings of Venomous Animals

    OpenAIRE

    Ennik, Franklin

    1980-01-01

    Data abstracted from 34 death certificates indicate that the three venomous animal groups most often responsible for human deaths in California from 1960 through 1976 were Hymenoptera (bees, wasps, ants and the like) (56 percent), snakes (35 percent) and spiders (6 percent). An average incidence of 2.0 deaths per year occurred during these 17 years, or an average death rate of 0.01 per 100,000 population per year. Nearly three times more males than females died of venomous animal bites and st...

  4. Study of gamma radiation from {sup 60}Co effects on Apis mellifera venom: biochemical, pharmacological and immunological aspects; Estudo dos efeitos da radiacao gama de {sup 60}Co na peconha de Apis mellifera: aspectos bioquimicos, farmacologicos e imunologicos

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Helena

    2001-07-01

    Africanized honeybees are very common insects in Brazil and frequently cause accidents followed by important immunological reactions and even deaths. Their venoms are composed of a complex mixture of substances of general biological actions. Ionizing radiation is able to modify molecular structures affecting the biological properties of proteins. It decreases toxic and enzymatic activities and so, it appears promising as a venom detoxification tool. The main objective of this work was to study the effects of gamma radiation on bee venom, regarding biochemical, pharmacological and immunological aspects. Africanized Apis mellifera whole venom (2 mg/ml) in 0.15 M NaCl solution was irradiated with 2 kGy in a {sup 60}Co source. Native and irradiated bee venoms were submitted to high performance size exclusion chromatography (Tosohaas G2000SW column), high performance reversed phase chromatography in a C-18 column under water/acetonitrile gradient, SDS-PAGE. For both venoms studies have been carried out in UV absorption spectrum, protein concentration, hemolytic activity, and PLA{sub 2} activity analysis, lethality assay (LD{sub 50}). Biodistribution studies was carried out after labelling native and irradiated bee venom with {sup 99m}Tc. The results showed that gamma radiation did not change the protein concentration nor its immunogenicity, although it could be observed that irradiated bee venom UV spectrum and SDS-PAGE profile presented differences when compared to native bee venom. This suggests that some structural alterations in bee venom components could have occurred after irradiation. HPLC-RP profiles showed that gamma radiation could have caused conformational changes, such as unfolding of molecule chains, changing their hydrophobic groups exposuring. The hemolytic and the PLA{sub 2} activities of irradiated bee venom were smaller than the native ones. The gamma radiation diminished the toxicity of bee venom, but did not abolish its bioactivity, like hemolysis

  5. Venomous and Poisonous Australian Animals of Veterinary Importance: A Rich Source of Novel Therapeutics

    OpenAIRE

    Hardy, Margaret C.; Jonathon Cochrane; Allavena, Rachel E.

    2014-01-01

    Envenomation and poisoning by terrestrial animals (both vertebrate and invertebrate) are a significant economic problem and health risk for domestic animals in Australia. Australian snakes are some of the most venomous animals in the world and bees, wasps, ants, paralysis ticks, and cane toads are also present as part of the venomous and poisonous fauna. The diagnosis and treatment of envenomation or poisoning in animals is a challenge and can be a traumatic and expensive process for owners. ...

  6. Deuterium and phosphorus-31 nuclear magnetic resonance study of the interaction of melittin with dimyristoylphosphatidylcholine bilayers and the effects of contaminating phospholipase A2

    International Nuclear Information System (INIS)

    The interaction of bee venom melittin with dimyristoylphosphatidylcholine (DMPC) selectively deuteriated in the choline head group has been studied by deuterium and phosphorus-31 nuclear magnetic resonance (NMR) spectroscopy. The action of residual phospholipase A2 in melittin samples resulted in mixtures of DMPC and its hydrolytic products that underwent reversible transitions at temperatures between 30 and 350C from extended bilayers to micellar particles which gave narrow single-line deuterium and phosphorus-31 NMR spectra. Similar transitions were observed in DMPC-myristoyllysophosphatidylcholine (lysoPC)-myristic acid mixtures containing melittin but not in melittin-free mixtures, indicating that melittin is able to stabilize extended bilayers containing DMPC and its hydrolytic products in the liquid-crystalline phase. Melittin, free of phospholipase A2 activity, and at 3-5 mol % relative to DMPC, induced reversible transitions between extended bilayers and micellar particles on passing through the liquid-crystalline to gel phase transition temperature of the lipid, effects similar to those observed in melittin-acyl chain deuteriated dipalmitoylphosphatidylcholine (DPPC) mixtures. LysoPC at concentrations of 20 mol % or greater relative to DMPC induced transitions between extended bilayers and micellar particles with characteristics similar to those induced by melittin. It is proposed that these melittin- and lysoPC-induced transitions share similar mechanisms. The effects of melittin on the quadrupole splittings and T1 relaxation times of head-group-deuteriated DMPC in the liquid-crystalline phase share features similar to the effects of metal ions on DPPC head groups, indicating that the conformational properties of the choline head group in PC bilayers may be affected by melittin and by metal ions in a similar manner

  7. Lactadherin inhibits secretory phospholipase A2 activity on pre-apoptotic leukemia cells

    DEFF Research Database (Denmark)

    Nyegaard, Steffen; Novakovic, Valerie A.; Rasmussen, Jan Trige;

    2013-01-01

    Secretory phospholipase A2 (sPLA2) is a critical component of insect and snake venoms and is secreted by mammalian leukocytes during inflammation. Elevated secretory PLA2 concentrations are associated with autoimmune diseases and septic shock. Many sPLA2’s do not bind to plasma membranes of quies......% of human secretory phospholipase A2-V on the membranes of human NB4 leukemia cells treated with calcium ionophore A23187. The data indicate that lactadherin may decrease inflammation by inhibiting sPLA2...

  8. Biochemical and immunological alterations of 60 Co irradiated Bothrops jararacussu venom

    International Nuclear Information System (INIS)

    Proteins irradiation leads to structural alterations resulting in activity and function loss. This process has been useful to detoxify animal venoms and toxins, resulting in low toxicity products which increased immunogenicity. The Bothrops jararacussu venom behaves as a weak immunogen and its lethal activity in not neutralized by either autologous, heterologous or bothropic polyvalent antisera. This venom is markedly myotoxic and and the commercial bothropic antiserum does not neutralize this activity, because of this low immunogenicity of the myotoxins. This present work was done in order to evaluate the possibility of irradiating Bothrops jararacussu, intending to increase the immunogenicity of the myotoxic components, leading to productions of myotoxins neutralizing antibodies. Bothrops jararacussu venom samples were irradiated with 500, 1000 and 2000 Gy of 60 Co gamma rays. A 2.3 folds decrease of toxicity was observed for the 1000 Gy irradiated samples while the 2000 Gy irradiated sample was at least 3.7 folds attenuated. On the other hand, the 500 Gy did not promote any detoxification. Electrophoresis and HPLC data indicate that the irradiation lead to the formation of high molecular weight products (aggregates). The proteolytic and phospholipasic activities decreased in a dose dependent manner, the phospholipases being more resistant than the proteases. Both the animals (rabbit) immunized with either native or 2000 Gy irradiated venom produced native venom binding antibodies, a slightly higher titer being obtained in the serum of the rabbit immunized with the irradiated samples. Western blot data indicate that the anti-irradiated venom Ig Gs recognised a greater amount of either autologous or heterologous venom bands, both sera behaving as genus specific. The anti-native serum did not neutralize the myotoxic activity of native venom, while the anti-irradiated one was able to neutralize this activity. (author)

  9. In vivo analysis of effects of venom from the jellyfish Chrysaora sp. in zebrafish (Danio rerio).

    Science.gov (United States)

    Becerra-Amezcua, Mayra P; Guerrero-Legarreta, Isabel; González-Márquez, Humberto; Guzmán-García, Xochitl

    2016-04-01

    The jellyfishes of the genus Chrysaora are present in all of the world's oceans, but the toxicity of their venoms has not yet been thoroughly characterized. The zebrafish as a toxicology model can be used for general toxicity testing of drugs and the investigation of toxicological mechanisms. The aim of this study was to evaluate the effect of crude venom from jellyfish Chrysaora sp., a species of jellyfish observed in the tropical lagoons of the Gulf of Mexico, on the zebrafish Danio rerio. Juvenile zebrafish were injected with different concentrations of venom from Chrysaora sp. via intraperitoneal and subcutaneous injections. The effects of the venom were determined by histopathological analysis and through the measurement of hemolytic and phospholipase A2 activities. The crude venom was examined by SDS-PAGE. The effect of sublethal concentrations of crude venom from Chrysaora sp. on D. rerio was hemorrhaging in the eyes, while the histopathological analysis demonstrated that the primary organs targeted were the pseudobranch, which displayed hyperemia, and the gill, which displayed hyperplasia and hypertrophy. The blood analysis exhibited hemolysis, nuclear abnormalities, and echinocytes by the action of phospholipase A2, which was determined to have 596 units of activity/mg of protein in the venom. The crude venom has proteins with molecular weights ranging from 250 to 6 kDa, with more density in the bands corresponding to 70, 20 and 15 kDa. The venom of Chysaora sp. caused disturbances in circulation associated with vascular dilation due to the localized release of inflammatory mediators. The hemolysis of erythrocytes was caused by the action of phospholipase A2. These findings not only provide an excellent study model but also have a great pharmacological potential for designing new drugs and for the elucidation of the mechanisms of action of and treatment against stings. PMID:26876134

  10. Snake venomics of the Lesser Antillean pit vipers Bothrops caribbaeus and Bothrops lanceolatus: correlation with toxicological activities and immunoreactivity of a heterologous antivenom.

    Science.gov (United States)

    Gutiérrez, José María; Sanz, Libia; Escolano, José; Fernández, Julián; Lomonte, Bruno; Angulo, Yamileth; Rucavado, Alexandra; Warrell, David A; Calvete, Juan J

    2008-10-01

    The venom proteomes of the snakes Bothrops caribbaeus and Bothrops lanceolatus, endemic to the Lesser Antillean islands of Saint Lucia and Martinique, respectively, were characterized by reverse-phase HPLC fractionation, followed by analysis of each chromatographic fraction by SDS-PAGE, N-terminal sequencing, MALDI-TOF mass fingerprinting, and collision-induced dissociation tandem mass spectrometry of tryptic peptides. The venoms contain proteins belonging to seven ( B. caribbaeus) and five ( B. lanceolatus) types of toxins. B. caribbaeus and B. lanceolatus venoms contain phospholipases A 2, serine proteinases, l-amino acid oxidases and zinc-dependent metalloproteinases, whereas a long disintegrin, DC-fragments and a CRISP molecule were present only in the venom of B. caribbaeus, and a C-type lectin-like molecule was characterized in the venom of B. lanceolatus. Compositional differences between venoms among closely related species from different geographic regions may be due to evolutionary environmental pressure acting on isolated populations. The venoms of these two species differed in the composition and the relative abundance of their component toxins, but they exhibited similar toxicological and enzymatic profiles in mice, characterized by lethal, hemorrhagic, edema-forming, phospholipase A 2 and proteolytic activities. The venoms of B. caribbaeus and B. lanceolatus are devoid of coagulant and defibrinogenating effects and induce only mild local myotoxicity in mice. The characteristic thrombotic effect described in human envenomings by these species was not reproduced in the mouse model. The toxicological profile observed is consistent with the abundance of metalloproteinases, PLA 2s and serine proteinases in the venoms. A polyvalent (Crotalinae) antivenom produced in Costa Rica was able to immunodeplete approximately 80% of the proteins from both B. caribbaeus and B. lanceolatus venoms, and was effective in neutralizing the lethal, hemorrhagic, phospholipase

  11. 外周NMDA受体介导蜜蜂毒诱导的持续性伤害性反应的行为学研究%INVOLVEMENT OF PERIPHERAL NMDA RECEPTORS IN PERSISTENT NOCICEPTION INDUCED BY SUBCUTANEOUS BEE VENOM INJECTION: A BEHAVIORAL STUDY

    Institute of Scientific and Technical Information of China (English)

    罗层; 陈军

    2000-01-01

    The present study was to investigate whether peripheral NMDA receptors were involved in the persistent nociceptioninduced by subcutaneous (s. C. ) bee venom injection in the conscious rat by using quatitative pain scoring methods, a.c. Bee venom injection into one hindpaw resulted in a persistent, monophasic nociceptive response characterized by continuously flinching.lifting and licking the injected paw for more than I h. The non-competitive. NMDA receptor channel blockers, ketamine and ME-801, were administered s.c. 5 or 20 min after bee venom. Local ketamine injection produced a suppression of flinching reflex by 20. 90±2.88% and 45.76±13.9%, while that of lifting/bcking time by 39. 53±10. 05% and 59.94±5.53%, at doses of 25mmol/L and 50 mmol/L respectively without any motor disturbance, Local MK-801 resulted in an inhibition of flinching reflexby 22.84±3.12% and 49.53±5.35%. While that of lifting/licking time by 17. 49±5.67%and 53.49±3. 87%. At doses of 10μmol/L and 100 ,μmol/L respectively also with no motor disturbance. However, s. C. Administration of ketamine and MK-801 inior region symmetrical to the bee venom injection site on the contralateral hindpaw produced no change in the nociceptive behaviors, suggesting that the analgesic actions of keramme and MK-8Ol were not the result of systemic effects. The present resultsuggests that peripheral NMDA receptors are involved in the production of persistent pain.%为了探讨外周NMDA受体是否介导大鼠足底皮下注入蜜蜂毒诱导的持续伤害性行为反应,本研究应用动物痛行为学定量方法评价局部用药对持续伤害性行为反应的作用效果.大鼠足底皮下注入蜜蜂毒可以诱导动物产生长达1h以上的持续、单相性的自发痛反应,其表现为自发缩足反射、抬足、舔足甚至咬足行为.注入蜜蜂毒之前局部给予非竞争性的NMDA受体通道阻断剂氯胺酮和MK-801.局部注入25mmol/L和50mmol/L氯胺酮可剂量依赖性

  12. Inhibition of bee venom induced persistent pain by intrathecal propofol in rats%鞘内注射异丙酚对大鼠皮下注入蜜蜂毒诱致的持续性痛反应的抑制作用

    Institute of Scientific and Technical Information of China (English)

    王丽芸; 王国良; 孙焱芫; 张英民; 陈军

    2003-01-01

    目的探讨异丙酚是否具有镇痛作用.方法应用蜜蜂毒(bee venom,BV)致痛模型,对大鼠致痛前后鞘内(IT)注入异丙酚是否具有镇痛作用进行比较研究.结果 BV致痛前,IT注入异丙酚(9μg,90μg和900μg)对BV诱致的持续自发性缩足反应具有剂量依赖性抑制作用,持续时间为10~15 min;BV致痛后,IT注入异丙酚亦产生剂量依赖性镇痛作用,而且抑制作用较预先给药强.结论异丙酚在脊髓具有镇痛作用且呈剂量依赖性;异丙酚既可用于疼痛预防也可用于疼痛治疗,其治疗作用优于预防作用.

  13. Snake venomics of Bothrops punctatus, a semiarboreal pitviper species from Antioquia, Colombia

    Directory of Open Access Journals (Sweden)

    Maritza Fernández Culma

    2014-01-01

    Full Text Available Bothrops punctatus is an endangered, semi-arboreal pitviper species distributed in Panamá, Colombia, and Ecuador, whose venom is poorly characterized. In the present work, the protein composition of this venom was profiled using the ‘snake venomics’ analytical strategy. Decomplexation of the crude venom by RP-HPLC and SDS-PAGE, followed by tandem mass spectrometry of tryptic digests, showed that it consists of proteins assigned to at least nine snake toxin families. Metalloproteinases are predominant in this secretion (41.5% of the total proteins, followed by C-type lectin/lectin-like proteins (16.7%, bradykinin-potentiating peptides (10.7%, phospholipases A2 (93%, serine proteinases (5.4%, disintegrins (38%, L-amino acid oxidases (3.1%, vascular endothelial growth factors (17%, and cysteine-rich secretory proteins (1.2%. Altogether, 6.6% of the proteins were not identified. In vitro, the venom exhibited proteolytic, phospholipase A2, and L-amino acid oxidase activities, as well as angiotensin-converting enzyme (ACE-inhibitory activity, in agreement with the obtained proteomic profile. Cytotoxic activity on murine C2C12 myoblasts was negative, suggesting that the majority of venom phospholipases A2 likely belong to the acidic type, which often lack major toxic effects. The protein composition of B. punctatus venom shows a good correlation with toxic activities here and previously reported, and adds further data in support of the wide diversity of strategies that have evolved in snake venoms to subdue prey, as increasingly being revealed by proteomic analyses.

  14. Enzymatic and toxinological activities of Hypnale hypnale (hump-nosed pit viper venom and its fractionation by ion exchange high performance liquid chromatography

    Directory of Open Access Journals (Sweden)

    CH Tan

    2011-01-01

    Full Text Available Hypnale hypnale (hump-nosed pit viper has been recently identified as one of the medically important venomous snakes in Sri Lanka and on the southwestern coast of India. The characterization of its venom is essential for understanding the pathophysiology of envenomation and for optimizing its management. In the present study, the biological properties of Hypnale hypnale venom and venom fractions obtained using Resource Q ion exchange chromatography were determined. The venom exhibited toxic activities typical of pit viper venom, comparable to that of its sister taxon, the Malayan pit viper (Calloselasma rhodostoma. Particularly noteworthy were its high activities of thrombin-like enzyme, proteases, phospholipase A2, L-amino acid oxidase and hyaluronidase. The thrombin-like enzyme was mainly acidic and distributed over several chromatography fractions, indicating its existence in multiple isoforms. The hemorrhagic and necrotic activities of the venom were likely associated with the proteolytic enzyme found mainly in the basic fraction. Phospholipase A2 and phosphomonoesterase exist in both acidic and basic isoforms, while L-amino acid oxidase and hyaluronidase are highly acidic. The venom clotting activity on fibrinogens showed distinct species specificity in the following increasing order for clotting time: bovine < rabbit < goat < human < horse < < dog, and was comparable to that of C. rhodostoma venom. Its clot formation on human fibrinogen is gradual and prolonged, a phenomenon suggestive of consumptive coagulopathy as a complication observed clinically. At an intramuscular sublethal dose, the venom did not cause acute kidney injury in a rodent model, contrary to the positive control group treated with Daboia russelii venom. Nephrotoxicity may result from higher venom doses in the context of coagulopathy, as a complication provoked by venom hematoxicity.

  15. Characterization of honeybee venom by MALDI-TOF and nanoESI-QqTOF mass spectrometry.

    Science.gov (United States)

    Matysiak, Jan; Schmelzer, Christian E H; Neubert, Reinhard H H; Kokot, Zenon J

    2011-01-25

    The aim of the study was to comprehensively characterize different honeybee venom samples applying two complementary mass spectrometry methods. 41 honeybee venom samples of different bee strains, country of origin (Poland, Georgia, and Estonia), year and season of the venom collection were analyzed using MALDI-TOF and nanoESI-QqTOF-MS. It was possible to obtain semi-quantitative data for 12 different components in selected honeybee venom samples using MALDI-TOF method without further sophisticated and time consuming sample pretreatment. Statistical analysis (ANOVA) has shown that there are qualitative and quantitative differences in the composition between honeybee venom samples collected over different years. It has also been demonstrated that MALDI-TOF spectra can be used as a "protein fingerprint" of honeybee venom in order to confirm the identity of the product. NanoESI-QqTOF-MS was applied especially for identification purposes. Using this technique 16 peptide sequences were identified, including melittin (12 different breakdown products and precursors), apamine, mast cell degranulating peptide and secapin. Moreover, the significant achievement of this study is the fact that the new peptide (HTGAVLAGV+Amidated (C-term), M(r)=822.53Da) has been discovered in bee venom for the first time. PMID:20850943

  16. Bee Pollen

    Science.gov (United States)

    ... Pollen Extract, Buckwheat Pollen, Extrait de Pollen d’Abeille, Honeybee Pollen, Honey Bee Pollen, Maize Pollen, Pine Pollen, Polen de Abeja, Pollen, Pollen d'Abeille, Pollen d’Abeille de Miel, Pollen de Sarrasin.

  17. Mitochondria and sarcoplasmic reticulum as model targets for neurotoxic and myotoxic phospholipases A2

    OpenAIRE

    Ng, Ronald H.; Howard, Bruce D.

    1980-01-01

    Certain neurotoxins and myotoxins from snake venoms have phospholipase A2 activity (phosphatide 2-acylhydrolase, EC 3.1.1.4), which appears to be necessary for their toxicity. Several of these toxins inhibit the net uptake of Ca2+ into sarcoplasmic reticulum vesicles and brain mitochondria. We have obtained evidence that the ability to inhibit this Ca2+ uptake is a mechanistically relevant correlate of the toxicity of these proteins rather than being just a nonspecific consequence of their ph...

  18. Intraspecific variation of biological activities in venoms from wild and captive Bothrops jararaca.

    Science.gov (United States)

    Saad, Eduardo; Curtolo Barros, Luciana; Biscola, Natalia; Pimenta, Daniel C; Barraviera, Silvia R C S; Barraviera, Benedito; Seabra Ferreira, Rui

    2012-01-01

    The venom of Bothrops jararaca is composed of complex mixture of molecules, mainly lectins, metalloproteinases, serinoproteinases, desintegrins, phospholipases, and peptides. This composition may vary according to the snake's age, gender, and region of origin. The aim of the was to determine individual variation in Bothrops jararaca venom in the Botucatu region, Sao Paulo State, Brazil, by means of enzymatic, biochemical, and pharmacological characterization, utilizing in vitro tests and biological assays. The activities were compared with those of Brazilian Reference Venom (BRV). Protein concentration varied between adult and juvenile groups. The electrophoretic profiles were similar, with molecular masses ranging between 25 and 50 kD, but with intraspecific variations. Reverse-phase high-performance liquid chromatography (RP-HPLC) revealed protein concentration differences. Coagulant activity did not differ significantly among adult groups, but there was a large variation between juvenile venom and BRV, which coagulated more extensively. Venoms from adults displayed greater hemorrhagic activity, especially in males recently obtained from the wild. In contrast, juveniles kept in captivity and adult males showed higher values. Edematogenic activity displayed an increase in edema in all groups. At the mean lethal dose (LD₅₀), toxicity varied significantly between groups, with venom from captive females being threefold more toxic than juvenile venom. Data illustrate the intra- and interspecific complexity that occurs in snake venoms, which may be attributed to ontogenetic, sexual, and environmental factors that affect variability in Bothrops jararaca venom. Further, it is proposed that Brazilian public health authorities document the constitution of pooled venom employed in the immunization of serum-producing animals due to this variability in venom properties. Given the large Brazilian territory, this variability requires regional monitoring and evaluation of

  19. Are ticks venomous animals?

    OpenAIRE

    Cabezas-Cruz, Alejandro; James J Valdés

    2014-01-01

    Introduction As an ecological adaptation venoms have evolved independently in several species of Metazoa. As haematophagous arthropods ticks are mainly considered as ectoparasites due to directly feeding on the skin of animal hosts. Ticks are of major importance since they serve as vectors for several diseases affecting humans and livestock animals. Ticks are rarely considered as venomous animals despite that tick saliva contains several protein families present in venomous taxa and that many...

  20. A comparative study of the biological activities of venoms from snakes of the genus Agkistrodon (moccasins and copperheads).

    Science.gov (United States)

    Tan, N H; Ponnudurai, G

    1990-01-01

    1. The hemorrhagic, procoagulant, anticoagulant, phosphodiesterase, alkaline phosphomonoesterase, 5'-nucleotidase, hyaluronidase, arginine ester hydrolase, phospholipase A, L-amino acid oxidase and protease activities of 31 samples of venom from three species of Agkistrodon (A. bilineatus, A. contortrix and A. piscivorus) and 10 venom samples from five other related species belonging to the same tribe of Agkistrodontini were examined. 2. The results indicate that interspecific differences in certain biological activities of the Agkistrodon venoms are more marked than individual variations of the activities, and that these differences can be used for differentiation of the species. Particularly useful for this purpose are the phosphodiesterase, arginine ester hydrolase and anticoagulant activities of the venoms. 3. Venoms of the subspecies of A. contortrix and A. piscivorus do not differ significantly in their biological activities. PMID:2158874

  1. Effects and mechanism of bee-venom-acupuncture based on Midnight-Noon Ebb-Flow doctrine on ankylosing spondylitis%子午流注蜂针对强直性脊柱炎的疗效及机制研究

    Institute of Scientific and Technical Information of China (English)

    温伟强; 黄胜光; 陈辉; 谭宁; 周汝云; 朱辉军

    2012-01-01

    Objective To observe the effects and safety of bee-venom-acupuncture based on Midnight-Noon Ebb-Flow doctrine on ankylosing spondylitis (AS), and its impacts on IL-6, TNF-α and sex hormone levels, and to explore its mechanisms. Methods 120 AS patients were randomly divided into 3 groups: 40 patients in treatment group were treated with bee-venom-acupuncture based on Midnight -Noon Ebb -Flow doctrine and syndrome differentiation; 40 patients in control group A were treated with bee-acupuncture based on syndrome differentiation; and 40 patients in the control group B were treated with sulfasalazine(SSZ) and diclofenac sodium. A treat- ment course was 4 weeks. Before and after 3 courses, indexes were observed and recorded, such as Bath AS disease activity index (BAS-DAI), Bath AS functional index (BASFI), duration of morning stiffness, likert' 4-grade score of whole body pain and spinal pain, evaluation by doctors and patients, the erythrosedi mentation (ESR), C-reactive protein (CRP), and the levels of IL-6, TNF-α and sex hormones. Adverse effects of medicines were also observed. Results The total effective rate was 82.5%, 72.5% and 70.0% in treatment group, control group A and control group B respectively; the statistic differences were significant (P0.05). The incidence rate of adverse effects in treatment group was 10%, while that in the control group A and B was 12% and 30% respectively. Conclusion Bee-venom-acupuncture based on Midnight-Noon Ebb-Flow doctrine presents significant efficacy on AS with less adverse effects. The mechanism may be related to inhibition of IL-6, TNF-α and Testosterone production.%目的 观察子午流注蜂针时强直性脊柱炎(ankylosing spondylitis,AS)的疗效、安全性及对患者血清白细胞介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)、性激素水平的影响,探讨其产生疗效的机制.方法 将120例AS患者随机分为3组,治疗组40例采用子午流注加辨证取定蜂针治疗,对照1组40例用

  2. Anaphylaxis to Insect Venom Allergens

    DEFF Research Database (Denmark)

    Ollert, Markus; Blank, Simon

    2015-01-01

    by a lack of specificity and venom immunotherapy by severe side effects and incomplete protection. In recent years, the knowledge about the molecular composition of Hymenoptera venoms has significantly increased and more and more recombinant venom allergens with advanced characteristics have become......, and to contribute to the understanding of the immunological mechanisms elicited by insect venoms....

  3. The beneficial effects of honeybee-venom serum on facial wrinkles in humans

    Directory of Open Access Journals (Sweden)

    Han SM

    2015-10-01

    Full Text Available Sang Mi Han,1 In Phyo Hong,1 Soon Ok Woo,1 Sung Nam Chun,2 Kwan Kyu Park,3 Young Mee Nicholls,4 Sok Cheon Pak5 1Department of Agricultural Biology, National Academy of Agricultural Science, Wanju, 2Dong Sung Pharmaceuticals Co Ltd, Seoul, 3Department of Pathology, School of Medicine, Catholic University of Daegu, Daegu, South Korea; 4Manuka Doctor Ltd, Auckland, New Zealand; 5School of Biomedical Sciences, Charles Sturt University, Bathurst, NSW, Australia Abstract: Facial wrinkles are an undesirable outcome caused by extrinsic photodamage and intrinsic aging processes. Currently, no effective strategies are known to prevent facial wrinkles. We assessed the beneficial effects of bee-venom serum on the clinical signs of aging skin. Our results show that bee-venom serum treatment clinically improved facial wrinkles by decreasing total wrinkle area, total wrinkle count, and average wrinkle depth. Therefore, bee-venom serum may be effective for the improvement of skin wrinkles. Keywords: bee venom, wrinkle, area, count, depth

  4. Display of wasp venom allergens on the cell surface of Saccharomyces cerevisiae

    DEFF Research Database (Denmark)

    Borodina, Irina; Jensen, B. M.; Søndergaard, Ib;

    2010-01-01

    Saccharomyces cerevisiae preserve their native allergenic properties and whether the yeast native surface glycoproteins interfere with IgE binding. We chose to use the major allergens from the common wasp Vespula vulgaris venom: phospholipase A1, hyaluronidase and antigen 5 as the model. Results: The proteins...... were expressed on the surface as fusions with a-agglutinin complex protein AGA2. The expression was confirmed by fluorescent cytometry (FACS) after staining the cells with antibody against a C-tag attached to the C-terminal end of the allergens. Phospholipase A1 and hyaluronidase retained their...

  5. Increased incidence of stings in venom-sensitive patients.

    Science.gov (United States)

    Stone, B D; Hutcheson, P S; Evans, R G; Slavin, R G

    1992-11-01

    We compared the histories of 29 venom-sensitive and 28 control subjects who were selected from our venom referral and general allergy clinics respectively. The variables in the study included insect avoidance knowledge, the number of stings during the previous 2 years, insects involved, and time spent out of doors per week. There was no significant difference between the two groups with respect to age. All venom-sensitive patients were well versed in avoidance techniques while only 3 of 28 controls (11%) claimed such knowledge. Venom-sensitive subjects were stung almost ten times more frequently than control subjects. Wasp stings were the most common, followed by yellow jacket, honey bee, and hornet. The venom-sensitive patients also reported spending a greater amount of time outdoors (x 17.4 hours versus x 11.8, P < .05). An analysis of covariance showed that this difference in outdoor exposure was insufficient to account for the disparity in the number of stings. We conclude that other factors such as intrinsic attractants must be responsible for this phenomenon. PMID:1456488

  6. Brain Infarction: Rare Neurological Presentation of African Bee Stings

    Directory of Open Access Journals (Sweden)

    Hernando Raphael Alvis- Miranda

    2014-01-01

    Full Text Available Bee stings are commonly encountered worldwide. Various manifestations after bee sting have been described including local reactions which are common, systemic responses such as anaphylaxis, diffuse intravascular coagulation and hemolysis. We report a case of a 74-year-old man who developed neurologic deficit 5 hours after bee stings, which was confirmed to be left frontal infarction on brain CT-scan. The case does not follow the reported pattern of hypovolemic or anaphylactic shock, hemolysis and/or rhabdomyolysis, despite the potentially lethal amount of venom injected. Diverse mechanisms have been proposed to give an explanation to all the clinical manifestation of both toxic and allergic reactions secondary to bee stings. Currently, the most accepted one state that victims can develop severe syndrome characterized by the release of a large amount of cytokines.

  7. Brain Infarction: Rare Neurological Presentation of African Bee Stings.

    Science.gov (United States)

    Alvis-Miranda, Hernando Raphael; Duarte-Valdivieso, Nancy Carolina; Alcala-Cerra, Gabriel; Moscote-Salazar, Luis Rafael

    2014-01-01

    Bee stings are commonly encountered worldwide. Various manifestations after bee sting have been described including local reactions which are common, systemic responses such as anaphylaxis, diffuse intravascular coagulation and hemolysis. We report a case of a 74-year-old man who developed neurologic deficit 5 hours after bee stings, which was confirmed to be left frontal infarction on brain CT-scan. The case does not follow the reported  pattern  of hypovolemic or anaphylactic shock, hemolysis and/or  rhabdomyolysis, despite the potentially lethal amount of venom injected. Diverse mechanisms have been proposed to give an explanation to all the clinical manifestation of both toxic and allergic reactions secondary to bee stings. Currently, the most accepted one state that victims can develop severe syndrome characterized by the release of a large amount of cytokines. PMID:27162866

  8. The Effects of a Chactoid Scorpion Venom and Its Purified Toxins on Rat Blood Pressure and Mast Cells Histamine Release

    Directory of Open Access Journals (Sweden)

    Philip Lazarovici

    2013-07-01

    Full Text Available The effect of the venom of the Chactoid family of scorpions on blood pressure was scantly investigated and was addressed in the present study using the venom of the Israeli scorpion, Scorpio maurus palmatus. Blood pressure in rats was monitored via cannulated femoral artery, while venom and toxins were introduced into femoral vein. Venom injection elicited a biphasic effect, expressed first by a fast and transient hypotensive response, which lasted up to 10 min, followed by a hypertensive response, which lasted up to one hour. It was found that these effects resulted from different venom components. Phospholipase A2 produced the hypotensive effect, while a non-enzymatic neurotoxic polypeptide fraction produced the hypertensive effect. Surprisingly, the main neurotoxic polypeptide to mice had no effect on blood pressure. In vitro experiments indicated that the hypertensive factors caused histamine release from the peritoneal mast cells, but this effect is assumed to be not relevant to their in vivo effect. In spite of the cytotoxic activity of phospholipase A2, it did not release histamine. These findings suggest that the effects of venom and isolated fractions on blood pressure parameters are mediated by different mechanisms, which deserve further pharmacological investigation.

  9. Unraveling the venom proteome of the bumblebee (Bombus terrestris) by integrating a combinatorial peptide ligand library approach with FT-ICR MS.

    Science.gov (United States)

    Van Vaerenbergh, Matthias; Debyser, Griet; Smagghe, Guy; Devreese, Bart; de Graaf, Dirk C

    2015-08-01

    Within the Apidae, the largest family of bees with over 5600 described species, the honeybee is the sole species with a well studied venom proteome. So far, only little research has focused on bumblebee venom. Recently, the genome sequence of the European large earth bumblebee (Bombus terrestris) became available and this allowed the first in-depth proteomic analysis of its venom composition. We identified 57 compounds, with 52 of them never described in bumblebee venom. Remarkably, 72% of the detected compounds were found to have a honeybee venom homolog, which reflects the similar defensive function of both venoms and the high degree of homology between both genomes. However, both venoms contain a selection of species-specific toxins, revealing distinct damaging effects that may have evolved in response to species-specific attackers. Further, this study extends the list of potential venom allergens. The availability of both the honeybee and bumblebee venom proteome may help to develop a strategy that solves the current issue of false double sensitivity in allergy diagnosis, which is caused by cross-reactivity between both venoms. A correct diagnosis is important as it is recommended to perform an immunotherapy with venom of the culprit species. PMID:26071081

  10. Radiologic Findings of Foreign Body Granuloma by the Bee Sting: A Case Report

    International Nuclear Information System (INIS)

    Bee sting therapy is a folk remedy used for arthralgia. An adverse reaction to bee sting therapy can be variable, ranging from a local inflammatory reaction to generalized anaphylaxis. There have been reports of dermatologic findings pertaining to bee sting granulomas, which results from a foreign body reaction to the persistence of venom and stinger at the sting site. However to the best of our knowledge, the radiologic findings of bee sting granulomas have not been reported on in Korea. We describe the ultrasound and MRI findings of bee sting granulomas at the lower extremity in a 36-year-old woman who underwent bee-sting therapy for osteoarthritis of the knee joints 3 months prior

  11. Phospholipase A2 Biochemistry

    OpenAIRE

    Burke, John E.; Dennis, Edward A.

    2008-01-01

    The phospholipase A2 (PLA2) superfamily consists of many different groups of enzymes that catalyze the hydrolysis of the sn-2 ester bond in a variety of different phospholipids. The products of this reaction, a free fatty acid, and lysophospholipid have many different important physiological roles. There are five main types of PLA2: the secreted sPLA2’s, the cytosolic cPLA2’s, the Ca2+ independent iPLA2’s, the PAF acetylhydrolases, and the lysosomal PLA2’s. This review focuses on the superfam...

  12. INHIBITORY EFFECTS OF PLANT PHENOLIC COMPOUNDS ON ENZYMATIC AND CYTOTOXIC ACTIVITIES INDUCED BY A SNAKE VENOM PHOSPHOLIPASE A2 EFECTOS INHIBITORIOS DE COMPUESTOS FENÓLICOS DE PLANTAS SOBRE LA ACTIVIDAD ENZIMÁTICA Y CITOTOXICA INDUCIDA POR UNA FOSFOLIPASA A2 DE VENENO DE SERPIENTE

    Directory of Open Access Journals (Sweden)

    Jaime A PEREAÑEZ

    2011-09-01

    Full Text Available Polyphenolic compounds have shown to inhibit toxic effects induced by snake venom proteins. In this work, we demonstrate that gallic acid, ferulic acid, caffeic acid, propylgallate and epigallocatechingallate inhibit the enzymatic activity of a phospholipase A2 (PLA2, using egg yolk as substrate. The IC50 values are between 0.38 – 3.93 mM. These polyphenolic compounds also inhibit the PLA2 enzymatic activity when synthetic substrate is used. Furthermore, these compounds decreased the cyotoxic effect induced by a myotoxic PLA2; specifically, epigallocatechin gallate exhibited the best inhibitory capacity with 90.92 ± 0.82%, while ferulic acid showed the lowest inhibitory activity with 30.96 ± 1.42%. Molecular docking studies were performed in order to determine the possible modes of action of phenolic compounds. All polyphenols showed hydrogen bonds with an active site of enzyme; moreover, epigallocatechingallate presented the strongest binding compared with the other compounds. Additionally, a preliminary structure-activity relationship analysis showed a correlation between the IC50 and the topological polar surface area of each compound (p = 0.0491, r = -0.8079 (-0.9878 to -0.2593, which indicates the surface area required for each molecule to bind with the majority of the enzyme. Furthermore, our results show that propylgallate and epigallocatechingallate are two novel natural products with anti-myotoxic potential. The topical application of these plant polyphenols at the bite site could lead to prevent myotoxicity; however, further in vivo studies would be necessary to confirm the in vitro results.Los compuestos fenólicos han mostrado inhibir los efectos tóxicos inducidos por proteínas de veneno de serpiente. En éste trabajo, nosotros demostramos que el ácido gálico, el ácido ferúlico, el ácido cafeico, el propilgalato y el epigalocatequingalato inhiben la actividad enzimática de una fosfolipasa A2 (PLA2 usando yema de huevo

  13. Hormone-like peptides in the venoms of marine cone snails

    DEFF Research Database (Denmark)

    Robinson, Samuel D.; Li, Qing; Bandyopadhyay, Pradip K.;

    2016-01-01

    /neuropeptide-like toxins, including peptides similar to the bee brain hormone prohormone-4, the mollusc ganglia neuropeptide elevenin, and thyrostimulin, a member of the glycoprotein hormone family, and confirmed the presence of insulin. We confirmed that at least two of these peptides are not only expressed in the venom......The venoms of cone snails (genus Conus) are remarkably complex, consisting of hundreds of typically short, disulfide-rich peptides termed conotoxins. These peptides have diverse pharmacological targets, with injection of venom eliciting a range of physiological responses, including sedation......, paralysis and sensory overload. Most conotoxins target the prey's nervous system but evidence of venom peptides targeting neuroendocrine processes is emerging. Examples include vasopressin, RFamide neuropeptides and recently also insulin. To investigate the diversity of hormone/neuropeptide-like molecules...

  14. Lactadherin inhibits secretory phospholipase A2 activity on pre-apoptotic leukemia cells.

    Directory of Open Access Journals (Sweden)

    Steffen Nyegaard

    Full Text Available Secretory phospholipase A2 (sPLA2 is a critical component of insect and snake venoms and is secreted by mammalian leukocytes during inflammation. Elevated secretory PLA2 concentrations are associated with autoimmune diseases and septic shock. Many sPLA2's do not bind to plasma membranes of quiescent cells but bind and digest phospholipids on the membranes of stimulated or apoptotic cells. The capacity of these phospholipases to digest membranes of stimulated or apoptotic cells correlates to the exposure of phosphatidylserine. In the present study, the ability of the phosphatidyl-L-serine-binding protein, lactadherin to inhibit phospholipase enzyme activity has been assessed. Inhibition of human secretory phospholipase A2-V on phospholipid vesicles exceeded 90%, whereas inhibition of Naja mossambica sPLA2 plateaued at 50-60%. Lactadherin inhibited 45% of activity of Naja mossambica sPLA2 and >70% of human secretory phospholipase A2-V on the membranes of human NB4 leukemia cells treated with calcium ionophore A23187. The data indicate that lactadherin may decrease inflammation by inhibiting sPLA2.

  15. Tropilaelaps of bees - epizootiological picture with special emphasis on the first description of the parasite in bumblebees and bees in Serbia

    Directory of Open Access Journals (Sweden)

    Manić Marija

    2014-01-01

    Full Text Available Honey bees are the most significant pollinators of plants worlwide. Importance of plant pollination widely exceeds all other economic benefits of modern beekeeping such as production of honey, Royal jelly, propolis, beeswax, honeybee venom etc. The issues concerning bees diseases are of extreme importance in modern commercial beekeeping. That especially regards to the fact that the number of disease agents in bees has considerably increased in recent decades. Using international transport, export or import of bees and their products, the possibility of entering various agents (parasites, bacterias, viruses and fungi into bee colonies. In recent years one of the biggest problems in beekeeping in Asia has become tropilaelaps - ectoparasitic bee disease caused by mites of the genus Tropilaelaps. But because of prevalent interest in parasites Varroa destructor and Acarapis woodi, the threat of mites from Tropileaps family has not been familiar for a long period of time. Today, Tropilaelaps is on the list of diseases endangering the whole world, made by OIE. There is a real risk of its spreading, mostly through trade, that is import of bees, swarms, queen bees, bee products and equipment. In the Republic of Serbia, this disease was described for the first time in April-May 1981 in bumblebees and bees in which a mass infestation with until then unknown parasites was detected. By additional analysis there was found out that the parasite in question was from Laelapidae (Mesostigmata family, Tropilaelaps.

  16. Interactions of pharmacologically active snake venom sPLA2 with different cell lines

    OpenAIRE

    Doumanov, Jordan; Mladenova, Kirilka; Aleksandrov, Radoslav; Danovski, Georgi; Petrova, Svetla

    2014-01-01

    Secreted Phospholipases A2 (sPLA2s) represent a large family of structurally related enzymes, which target different tissues and organs and induce numerous pharmacological effects based on their catalytic specificity – hydrolysis of the sn-2 ester bond of glycerophospholipids. The neurotoxin vipoxin, isolated from the venom of Vipera ammodytes meriodionalis, is a heterodimeric postsynaptic ionic complex composed of two protein subunits – a basic and toxic His48 sPLA2 enzyme and an acidic, enz...

  17. Modeling Honey Bee Populations.

    Directory of Open Access Journals (Sweden)

    David J Torres

    Full Text Available Eusocial honey bee populations (Apis mellifera employ an age stratification organization of egg, larvae, pupae, hive bees and foraging bees. Understanding the recent decline in honey bee colonies hinges on understanding the factors that impact each of these different age castes. We first perform an analysis of steady state bee populations given mortality rates within each bee caste and find that the honey bee colony is highly susceptible to hive and pupae mortality rates. Subsequently, we study transient bee population dynamics by building upon the modeling foundation established by Schmickl and Crailsheim and Khoury et al. Our transient model based on differential equations accounts for the effects of pheromones in slowing the maturation of hive bees to foraging bees, the increased mortality of larvae in the absence of sufficient hive bees, and the effects of food scarcity. We also conduct sensitivity studies and show the effects of parameter variations on the colony population.

  18. Venom proteomes of South and North American opisthoglyphous (Colubridae and Dipsadidae) snake species: a preliminary approach to understanding their biological roles.

    Science.gov (United States)

    Peichoto, María E; Tavares, Flávio L; Santoro, Marcelo L; Mackessy, Stephen P

    2012-12-01

    Opisthoglyphous snake venoms remain under-explored despite being promising sources for ecological, evolutionary and biomedical/biotechnological research. Herein, we compared the protein composition and enzymatic properties of the venoms of Philodryas baroni (PbV), Philodryas olfersii olfersii (PooV) and Philodryas patagoniensis (PpV) from South America, and Hypsiglena torquata texana (HttV) and Trimorphodon biscutatus lambda (TblV) from North America. All venoms degraded azocasein, and this metalloproteinase activity was significantly inhibited by EDTA. PooV exhibited the highest level of catalytic activity towards synthetic substrates for serine proteinases. All venoms hydrolyzed acetylthiocholine at low levels, and only TblV showed phospholipase A(2) activity. 1D and 2D SDS-PAGE profile comparisons demonstrated species-specific components as well as several shared components. Size exclusion chromatograms from the three Philodryas venoms and HttV were similar, but TblV showed a notably different pattern. MALDI-TOF MS of crude venoms revealed as many as 49 distinct protein masses, assigned to six protein families. MALDI-TOF/TOF MS analysis of tryptic peptides confirmed the presence of cysteine-rich secretory proteins in all venoms, as well as a phospholipase A(2) and a three-finger toxin in TblV. Broad patterns of protein composition appear to follow phylogenetic lines, with finer scale variation likely influenced by ecological factors such as diet and habitat. PMID:22974712

  19. Venomous bites and stings.

    Science.gov (United States)

    Warrell, D A; Fenner, P J

    1993-04-01

    Travellers to tropical countries are often extremely concerned about the risk of bites and stings by venomous animals. This fear prompts many enquiries, usually at the last moment before departure, about the possibility of carrying first aid kits and antivenoms. In fact, these accidents are extremely rare because most travellers wear shoes and are far less exposed to venomous animals than indigenous peoples for whom bites and stings may be important causes of death or morbidity. PMID:8101465

  20. Bothrops asper snake venom and its metalloproteinase BaP–1 activate the complement system. Role in leucocyte recruitment

    Directory of Open Access Journals (Sweden)

    Sandra H. P. Farsky

    2000-01-01

    Full Text Available The venom of the snake Bothrops asper, the most important poisonous snake in Central America, evokes an inflammatory response, the mechanisms of which are not well characterized. The objectives of this study were to investigate whether B. asper venom and its purified toxins – phospholipases and metalloproteinase – activate the complement system and the contribution of the effect on leucocyte recruitment. In vitro chemotaxis assays were performed using Boyden's chamber model to investigate the ability of serum incubated with venom and its purified toxins to induce neutrophil migration. The complement consumption by the venom was evaluated using an in vitro haemolytic assay. The importance of complement activation by the venom on neutrophil migration was investigated in vivo by injecting the venom into the peritoneal cavity of C5-deficient mice. Data obtained demonstrated that serum incubated with crude venom and its purified metalloproteinase BaP–1 are able to induce rat neutrophil chemotaxis, probably mediated by agent(s derived from the complement system. This hypothesis was corroborated by the capacity of the venom to activate this system in vitro. The involvement of C5a in neutrophil chemotaxis induced by venom-activated serum was demonstrated by abolishing migration when neutrophils were pre-incubated with antirat C5a receptor antibody. The relevance of the complement system in in vivo leucocyte mobilization was further demonstrated by the drastic decrease of this response in C5-deficient mice. Pre-incubation of serum with the soluble human recombinant complement receptor type 1 (sCR 1 did not prevent the response induced by the venom, but abolished the migration evoked by metalloproteinase-activated serum. These data show the role of the complement system in bothropic envenomation and the participation of metalloproteinase in the effect. Also, they suggest that the venom may contain other component(s which can cause direct activation

  1. Venom from Opisthacanthus elatus scorpion of Colombia, could be more hemolytic and less neurotoxic than thought.

    Science.gov (United States)

    Estrada-Gómez, Sebastián; Vargas Muñoz, Leidy Johana; Saldarriaga-Córdoba, Mónica; Quintana Castillo, Juan Carlos

    2016-01-01

    We report the first biochemical, biological, pharmacological and partial proteomic characterization studies of the Opisthancanthus elatus venom (Gervais, 1844) from Colombia. The Reverse Phase High-Performance Liquid Chromatography venom profile showed 28 main well-defined peaks, most eluting between 20 and 45min (18-30% of acetonitrile, respectively). High-resolution mass analysis indicates the presence of 106 components ranging from 806.59742Da to 16849.4139Da. O. elatus venom showed hemolytic activity and hydrolyzed the specific substrate BapNa suggesting the presence of proteins with serine-protease activity. Collected RP-HPLC fractions eluting at 52.6, 55.5, 55.8, 56.2, and 63.9min (PLA2 region between 33 and 40% of acetonitrile), showed hemolytic activity and hydrolyzed the synthetic substrate 4-nitro-3-octanoyloxy-benzoic acid, indicating the presence of compounds with phospholipases A2 activity. These RP-HPLC fractions, showed molecular masses values up to 13978.19546Da, corroborating the possible presence of the mentioned enzymes. Tryptic digestion and MS/MS analysis showed the presence of a phospholipase like fragment, similar to on described in other Opisthacanthus genus studies. No coagulant activity was observed. No larvicidal or antimicrobial activity was observed at concentrations evaluated. Lethal and toxic activity is expected at doses above 100mg/kg, no neurotoxic effects were detected at lower doses. In conclusion, O. elatus exhibits a venom with a predominant phospholipase A2 activity than thought; mammal's neurotoxic activity is expected above the 100mg/kg, which is very high compared to the venom from other neurotoxic scorpions. PMID:26477848

  2. Radioprotection: mechanism and radioprotective agents including honeybee venom

    International Nuclear Information System (INIS)

    Since 1949, a great deal of research has been carried on the radioprotective action of chemical substances. These substances have shown to reduce mortality when administered to animals prior to exposure to a lethal dose of radiation. This fact is of considerable importance since it permits reduction of radiation-induced damage and provides prophylactic treatment for the damaging effects produced by radiotherapy. The following radioprotection mechanisms were proposed: free radical scavenger, repair by hydrogen donation to target molecules formation of mixed disulfides, delay of cellular division and induction of hypoxia in the tissues. Radioprotective agents have been divided into four major groups: the thiol compounds, other sulfur compounds, pharmacological agents (anesthetic drugs, analgesics, tranquilizers, etc.) and other radioprotective agents (WR-1065, WR-2721, vitamins C and E, glutathione, etc.). Several studies revealed the radioprotective action of Apis mellifera honeybee venom as well as that of its components mellitin and histamine. Radioprotective activity of bee venom involves mainly the stimulation of the hematopoietic system. In addition, release of histamine and reduction in oxygen tension also contribute to the radioprotective action of bee venom. (author)

  3. Radioprotection: mechanism and radioprotective agents including honeybee venom

    Energy Technology Data Exchange (ETDEWEB)

    Varanda, E.A.; Tavares, D.C. [UNESP, Araraquara, SP (Brazil). Escola de Ciencias Farmaceuticas. Dept. de Ciencias Biologicas

    1998-07-01

    Since 1949, a great deal of research has been carried on the radioprotective action of chemical substances. These substances have shown to reduce mortality when administered to animals prior to exposure to a lethal dose of radiation. This fact is of considerable importance since it permits reduction of radiation-induced damage and provides prophylactic treatment for the damaging effects produced by radiotherapy. The following radioprotection mechanisms were proposed: free radical scavenger, repair by hydrogen donation to target molecules formation of mixed disulfides, delay of cellular division and induction of hypoxia in the tissues. Radioprotective agents have been divided into four major groups: the thiol compounds, other sulfur compounds, pharmacological agents (anesthetic drugs, analgesics, tranquilizers, etc.) and other radioprotective agents (WR-1065, WR-2721, vitamins C and E, glutathione, etc.). Several studies revealed the radioprotective action of Apis mellifera honeybee venom as well as that of its components mellitin and histamine. Radioprotective activity of bee venom involves mainly the stimulation of the hematopoietic system. In addition, release of histamine and reduction in oxygen tension also contribute to the radioprotective action of bee venom. (author)

  4. General characterization of venom from the Moroccan snakes Macrovipera mauritanica and Cerastes cerastes

    Directory of Open Access Journals (Sweden)

    N Oukkache

    2012-01-01

    Full Text Available Ophidian envenomation accidents constitute a serious public health problem in many countries around the globe. Over 5 million such accident cases occur each year causing more than 100,000 deaths. In Africa, more than 20,000 deaths per year are registered while 400,000 envenomation victims retain severe and permanent functional sequelae. In Morocco, snakebites are frequent and of greater severity in children. They occur mostly in rural areas. The incidence of these bites remains poorly understood and vastly underestimated. The epidemiological data are not well known due to the absence of a national registry, whereas a significant proportion of envenomations receive only traditional treatment methods in non-medical intensive care. This prompted us to investigate the enzymatic and biological properties of venom biochemical constituents from two of the most dangerous snake venoms in Morocco: Cerastes cerastes (Cc and Macrovipera mauritanica (Mm. Also, we studied the immune cross-reactivity of Cc and Mm venoms in comparison to that of another important dangerous Moroccan viper, Bitis arietans (Ba, to identify the best candidates (venom or a mixture of venoms for producing the most efficient and protective antivenom. In the present study, we report a preliminary venom characterization of Cc and Mm and the cross-reactivity that may exist between their venoms and Ba. These venoms are known to be highly toxic and contain several proteins that differ by molecular weights. Interestingly, both Cc and Mm venoms are characterized by intense hemorrhagic and phospholipase A2 activities and their ability to degrade the α and γ chains of fibrinogen. They display very low proteolysis through the casein test. After injection into mice, Cc and Mm induce myonecrosis in skeletal muscles, which most likely reflects direct action of myotoxins and indirect action of hemorrhagic molecules present in these venoms. In mice, this myonecrosis diminishes serum creatine

  5. Effect of α-lipoic Acid on Hemolytic Activity of Iranian Vipera Lebetina Venom

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    Amoozgari, Z. (MSc

    2015-05-01

    Full Text Available Background and Objective: Snake venom is a complex of several toxic elements and enzymes. It has the agents with the ability to destroy cellular and subcellular membrane and to bring about hemolysis of red blood cells (RBC. Two types of direct and indirect hemolytic activity are known in snake venom in that phospholipase A2 is responsible for the indirect lysis. The aim of this study was to investigate the effect of α-lipoic acid on hemolytic activity of Iranian Vipera Lebetina venom. Material and Methods: Protein concentration of the crude venom of Vipera Lebetina was determined using bovine serum albumin as a standard. Direct hemolytic activity of venom was determined by using the Human RBC and Indirect hemolytic activity was assayed on RBC in the presence of egg yolk. Then, α-lipoic acid with different concentrations in 100 mM Tris-HCL buffer was applied and its effect on hemolysis of RBC was studied. Results: direct hemolytic activity on RBC was not observed while its indirect activity was detected to be increased proportional to different concentration of α-lipoic acid. The range of indirect hemolysis was increased up to 60% by 60µm α-lipoic acid. Conclusion: Not only has α-lipoic acid no inhibitory effects on the hemolytic activity of Iranian Vipera Lebetina venom but also has the positive effects on it.

  6. In vitro hemolytic activity of Bothrops lanceolatus (fer-de-lance venom

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    LJ Martins

    2009-01-01

    Full Text Available Bothrops lanceolatus venom contains a variety of enzymatic and biological activities. The present work investigated the hemolytic activity of this venom and its phospholipase A2 (PLA2. Bothrops lanceolatus venom (6.7 µg/mL caused indirect hemolysis of cow, horse, rat and sheep erythrocytes, with horse erythrocytes being the most sensitive; no direct hemolysis was observed. Hemolysis in sheep erythrocytes was concentration-dependent (5-11.7 µg/mL and markedly attenuated by heating the venom for 30 minutes at ≥ 40°C and by the PLA2 inhibitor p-bromophenacyl bromide. An acidic PLA2 (5 µg/mL purified from B. lanceolatus venom also caused hemolysis. This PLA2 showed immunoprecipitin lines with antivenom against B. lanceolatus, which suggests that the enzymatic and hemolytic activities of this enzyme may be neutralized during antivenom therapy. These results indicate that B. lanceolatus venom and its PLA2 can cause hemolysis in vitro.

  7. Antitumoral Activity of Snake Venom Proteins: New Trends in Cancer Therapy

    Science.gov (United States)

    Calderon, Leonardo A.; Sobrinho, Juliana C.; Zaqueo, Kayena D.; de Moura, Andrea A.; Grabner, Amy N.; Mazzi, Maurício V.; Marcussi, Silvana; Fernandes, Carla F. C.; Zuliani, Juliana P.; Carvalho, Bruna M. A.; da Silva, Saulo L.; Stábeli, Rodrigo G.; Soares, Andreimar M.

    2014-01-01

    For more than half a century, cytotoxic agents have been investigated as a possible treatment for cancer. Research on animal venoms has revealed their high toxicity on tissues and cell cultures, both normal and tumoral. Snake venoms show the highest cytotoxic potential, since ophidian accidents cause a large amount of tissue damage, suggesting a promising utilization of these venoms or their components as antitumoral agents. Over the last few years, we have studied the effects of snake venoms and their isolated enzymes on tumor cell cultures. Some in vivo assays showed antineoplastic activity against induced tumors in mice. In human beings, both the crude venom and isolated enzymes revealed antitumor activities in preliminary assays, with measurable clinical responses in the advanced treatment phase. These enzymes include metalloproteases (MP), disintegrins, L-amino acid oxidases (LAAOs), C-type lectins, and phospholipases A2 (PLA2s). Their mechanisms of action include direct toxic action (PLA2s), free radical generation (LAAOs), apoptosis induction (PLA2s, MP, and LAAOs), and antiangiogenesis (disintegrins and lectins). Higher cytotoxic and cytostatic activities upon tumor cells than normal cells suggest the possibility for clinical applications. Further studies should be conducted to ensure the efficacy and safety of different snake venom compounds for cancer drug development. PMID:24683541

  8. Mammalian phospholipase C.

    Science.gov (United States)

    Kadamur, Ganesh; Ross, Elliott M

    2013-01-01

    Phospholipase C (PLC) converts phosphatidylinositol 4,5-bisphosphate (PIP(2)) to inositol 1,4,5-trisphosphate (IP(3)) and diacylglycerol (DAG). DAG and IP(3) each control diverse cellular processes and are also substrates for synthesis of other important signaling molecules. PLC is thus central to many important interlocking regulatory networks. Mammals express six families of PLCs, each with both unique and overlapping controls over expression and subcellular distribution. Each PLC also responds acutely to its own spectrum of activators that includes heterotrimeric G protein subunits, protein tyrosine kinases, small G proteins, Ca(2+), and phospholipids. Mammalian PLCs are autoinhibited by a region in the catalytic TIM barrel domain that is the target of much of their acute regulation. In combination, the PLCs act as a signaling nexus that integrates numerous signaling inputs, critically governs PIP(2) levels, and regulates production of important second messengers to determine cell behavior over the millisecond to hour timescale. PMID:23140367

  9. Venom Down Under: Dynamic Evolution of Australian Elapid Snake Toxins

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    Timothy N. W. Jackson

    2013-12-01

    Full Text Available Despite the unparalleled diversity of venomous snakes in Australia, research has concentrated on a handful of medically significant species and even of these very few toxins have been fully sequenced. In this study, venom gland transcriptomes were sequenced from eleven species of small Australian elapid snakes, from eleven genera, spanning a broad phylogenetic range. The particularly large number of sequences obtained for three-finger toxin (3FTx peptides allowed for robust reconstructions of their dynamic molecular evolutionary histories. We demonstrated that each species preferentially favoured different types of α-neurotoxic 3FTx, probably as a result of differing feeding ecologies. The three forms of α-neurotoxin [Type I (also known as (aka: short-chain, Type II (aka: long-chain and Type III] not only adopted differential rates of evolution, but have also conserved a diversity of residues, presumably to potentiate prey-specific toxicity. Despite these differences, the different α-neurotoxin types were shown to accumulate mutations in similar regions of the protein, largely in the loops and structurally unimportant regions, highlighting the significant role of focal mutagenesis. We theorize that this phenomenon not only affects toxin potency or specificity, but also generates necessary variation for preventing/delaying prey animals from acquiring venom-resistance. This study also recovered the first full-length sequences for multimeric phospholipase A2 (PLA2 ‘taipoxin/paradoxin’ subunits from non-Oxyuranus species, confirming the early recruitment of this extremely potent neurotoxin complex to the venom arsenal of Australian elapid snakes. We also recovered the first natriuretic peptides from an elapid that lack the derived C-terminal tail and resemble the plesiotypic form (ancestral character state found in viper venoms. This provides supporting evidence for a single early recruitment of natriuretic peptides into snake venoms. Novel

  10. Bothrops pauloensis snake venom toxins: the search for new therapeutic models.

    Science.gov (United States)

    Rodrigues, Veridiana M; Lopes, Daiana S; Castanheira, Leticia E; Gimenes, Sarah N C; Naves de Souza, Dayane L; Ache, David C; Borges, Isabela P; Yoneyama, Kelly A G; Rodrigues, Renata S

    2015-01-01

    Snake venoms constitute a mixture of bioactive components that are involved not only in envenomation pathophysiology but also in the development of new drugs to treat many diseases. Different enzymatic and non-enzymatic proteins, such as phospholipases A2, hyaluronidases, L-amino acid oxidases, metalloproteinases, serine proteinases, lectins and disintegrins have been isolated and their functional and structural properties described in the literature. Many of these studies have also explored their medicinal potential focusing mainly on anticancer, antithrombotic and microbicide therapies. Bothrops pauloensis is a species found in Brazil, whose venom has been the focus of our studies in order to explore the biochemical and functional characteristics of their components. In this review, we have presented the main results of years of research on different toxins from B. pauloensis emphasizing their therapeutic potential. Studies concerning snake venom toxins to search for new therapeutic models open perspectives for new drug discovery. PMID:25686731

  11. Management of corneal bee sting

    Directory of Open Access Journals (Sweden)

    Razmjoo H

    2011-12-01

    Full Text Available Hassan Razmjoo1,2, Mohammad-Ali Abtahi1,2,4, Peyman Roomizadeh1,3, Zahra Mohammadi1,2, Seyed-Hossein Abtahi1,3,41Medical School, Isfahan University of Medical Sciences (IUMS; 2Ophthalmology Ward, Feiz Hospital, IUMS; 3Isfahan Medical Students Research Center (IMSRC, IUMS; 4Isfahan Ophthalmology Research Center (IORC, Feiz Hospital, IUMS, Isfahan, IranAbstract: Corneal bee sting is an uncommon environmental eye injury that can result in various ocular complications with an etiology of penetrating, immunologic, and toxic effects of the stinger and its injected venom. In this study we present our experience in the management of a middle-aged male with a right-sided deep corneal bee sting. On arrival, the patient was complaining of severe pain, blurry vision with acuity of 160/200, and tearing, which he had experienced soon after the injury. Firstly, we administered conventional drugs for eye injuries, including topical antibiotic, corticosteroid, and cycloplegic agents. After 2 days, corneal stromal infiltration and edema developed around the site of the sting, and visual acuity decreased to 100/200. These conditions led us to remove the stinger surgically. Within 25 days of follow-up, the corneal infiltration decreased gradually, and visual acuity improved to 180/200. We suggest a two-stage management approach for cases of corneal sting. For the first stage, if the stinger is readily accessible or primary dramatic reactions, including infiltration, especially on the visual axis, exist, manual or surgical removal would be indicated. Otherwise, we recommend conventional treatments for eye injuries. Given this situation, patients should be closely monitored for detection of any worsening. If the condition does not resolve or even deteriorates, for the second stage, surgical removal of the stinger under local or generalized anesthesia is indicated.Keywords: bee sting, stinger, cornea, removal, management, surgery

  12. Clinical effect of combination of conventional therapy with blood purification therapy on acute bee venom poisoning%常规方法与血液净化联合治疗急性蜂毒中毒临床疗效观察

    Institute of Scientific and Technical Information of China (English)

    徐吉先; 符旭红; 刘捷; 李刚; 王元

    2013-01-01

    目的 探讨常规方法联合血液净化治疗急性蜂毒中毒的疗效.方法 本院2010~2011年收治478例急性蜂毒中毒患者,其中222例采用单纯常规内科治疗(常规治疗组),256例采用常规内科治疗联合血液净化即血液透析串联血液灌流治疗(联合治疗组).比较两组疗效.结果 联合治疗组治愈率、好转率明显高于常规治疗组(P<0.05),且死亡率及住院时间明显低于常规治疗组(P<0.05),且无慢性肾功能衰竭(CRF)发生,而常规治疗组发生CRF 3例.结论 常规方法联合血液净化治疗急性蜂毒中毒疗效确切,并发症少,死亡率低,住院时间短,值得临床推广.%Objective To investigate the therapeutic effects of combination of conventional therapy and blood purification therapy on bee venom acute poisoned cases. Methods Four hundred seventy-eight cases treated from 2010 to 2011 were divided into two groups:HP+HD group(n = 111) treated in 2010 and combination of conventional therapy with blood purification therapy group(HP + HD) (n = 256). Results Compared to the conventional therapy group,the recovery rate of HP+HD group was higher,and the average stay in hospital was shorter. Conclusions The therapeutic effects of combination of conventional therapy with HP+HD are better than the conventional therapy alone.

  13. Isolation, structural and functional characterization of a new Lys49 phospholipase A2 homologue from Bothrops neuwiedi urutu with bactericidal potential.

    Science.gov (United States)

    Corrêa, Edailson A; Kayano, Anderson M; Diniz-Sousa, Rafaela; Setúbal, Sulamita S; Zanchi, Fernando B; Zuliani, Juliana P; Matos, Najla B; Almeida, José R; Resende, Letícia M; Marangoni, Sérgio; da Silva, Saulo L; Soares, Andreimar M; Calderon, Leonardo A

    2016-06-01

    Snake venom is a complex mixture of active compounds consisting of 80-90% proteins and peptides that exhibit a variety of biological actions that are not completely clarified or identified. Of these, phospholipase A2 is one of the molecules that has shown great biotechnological potential. The objectives of this study were to isolate, biochemically and biologically characterize a Lys49 phospholipase A2 homologue from the venom of Bothrops neuwiedi urutu. The protein was purified after two chromatographic steps, anion exchange and reverse phase. The purity and relative molecular mass were assessed by SDS-PAGE, observing a molecular weight typical of PLA2s, subsequently confirmed by mass spectrometry obtaining a mass of 13,733 Da. As for phospholipase activity, the PLA2 proved to be enzymatically inactive. The analyses by Edman degradation and sequencing of the peptide fragments allowed for the identification of 108 amino acid residues; this sequence showed high identity with other phospholipases A2 from Bothrops snake venoms, and identified this molecule as a novel PLA2 isoform from B. neuwiedi urutu venom, called BnuTX-I. In murine models, both BnuTX-I as well as the venom induced edema and myotoxic responses. The cytotoxic effect of BnuTX-I in murine macrophages was observed at concentrations above 12 μg/mL. BnuTX-I also presented antimicrobial activity against gram-positive and negative bacterial strains, having the greatest inhibitory effect on Pseudomonas aeruginosa. The results allowed for the identification of a new myotoxin isoform with PLA2 structure with promising biotechnological applications. PMID:26927324

  14. Coagulant effects of black snake (Pseudechis spp.) venoms and in vitro efficacy of commercial antivenom.

    Science.gov (United States)

    Lane, J; O'Leary, M A; Isbister, G K

    2011-09-01

    The coagulant effects of Australasian black snakes (Pseudechis spp.) are poorly understood and differ to the procoagulant venoms of most dangerous snakes in Australia. This study aimed to investigate in vitro coagulant effects of Pseudechis venoms and the efficacy of commercial black snake antivenom (BlSAV), tiger snake antivenom (TSAV) and specific rabbit anti-snake IgG to neutralise these effects. Using a turbidimetric assay, all six Pseudechis venoms had anticoagulant activity, as well as phospholipase A(2) (PLA(2)) activity. Inhibition of PLA(2) activity removed anticoagulant effects of the venoms. Pseudechis porphyriacus was unique and had procoagulant activity independent of PLA2 activity. Both BlSAV and TSAV completely inhibited the coagulant and PLA2 activity of all Pseudechis venoms. PLA2 activity was also inhibited completely by p-Bromophenacyl bromide (pBPB) and partially by specific anti-N. scutatus IgG antibodies. Anti-N. scutatus IgG also completely inhibited anticoagulant activity of Pseudechis venom. All Pseudechis venoms showed immunological cross reactivity with specific anti-snake IgG antibodies to P. porphyriacus, Pseudechis australis and Notechis scutatus. Pseudechis venoms have in vitro anticoagulant activity that appears to be attributable to PLA(2) activity. Both antivenoms inhibited anticoagulant and PLA(2) activity at concentrations below those occurring in patients treated with one vial of antivenom. There was cross-neutralisation of Pseudechis venoms and N. scutatus antibodies that might be attributable to immunological similarities between the venoms. PMID:21723878

  15. Biochemical and molecular characterization of the venom from the Cuban scorpion Rhopalurus junceus.

    Science.gov (United States)

    García-Gómez, B I; Coronas, F I V; Restano-Cassulini, R; Rodríguez, R R; Possani, L D

    2011-07-01

    This communication describes the first general biochemical, molecular and functional characterization of the venom from the Cuban blue scorpion Rhopalurus junceus, which is often used as a natural product for anti-cancer therapy in Cuba. The soluble venom of this arachnid is not toxic to mice, injected intraperitoneally at doses up to 200 μg/20 g body weight, but it is deadly to insects at doses of 10 μg per animal. The venom causes typical alpha and beta-effects on Na+ channels, when assayed using patch-clamp techniques in neuroblastoma cells in vitro. It also affects K+ currents conducted by ERG (ether-a-go-go related gene) channels. The soluble venom was shown to display phospholipase, hyaluronidase and anti-microbial activities. High performance liquid chromatography of the soluble venom can separate at least 50 components, among which are peptides lethal to crickets. Four such peptides were isolated to homogeneity and their molecular masses and N-terminal amino acid sequence were determined. The major component (RjAa12f) was fully sequenced by Edman degradation. It contains 64 amino acid residues and four disulfide bridges, similar to other known scorpion toxins. A cDNA library prepared from the venomous glands of one scorpion allowed cloning 18 genes that code for peptides of the venom, including RjA12f and eleven other closely related genes. Sequence analyses and phylogenetic reconstruction of the amino acid sequences deduced from the cloned genes showed that this scorpion contains sodium channel like toxin sequences clearly segregated into two monophyletic clusters. Considering the complex set of effects on Na+ currents verified here, this venom certainly warrant further investigation. PMID:21605585

  16. Effects of Bothrops asper snake venom on lymphatic vessels: insights into a hidden aspect of envenomation.

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    Javier Mora

    Full Text Available BACKGROUND: Envenomations by the snake Bothrops asper represent a serious medical problem in Central America and parts of South America. These envenomations concur with drastic local tissue pathology, including a prominent edema. Since lymph flow plays a role in the maintenance of tissue fluid balance, the effect of B. asper venom on collecting lymphatic vessels was studied. METHODOLOGY/PRINCIPAL FINDINGS: B. asper venom was applied to mouse mesentery, and the effects were studied using an intravital microscopy methodology coupled with an image analysis program. B. asper venom induced a dose-dependent contraction of collecting lymphatic vessels, resulting in a reduction of their lumen and in a halting of lymph flow. The effect was reproduced by a myotoxic phospholipase A(2 (PLA(2 homologue isolated from this venom, but not by a hemorrhagic metalloproteinase or a coagulant thrombin-like serine proteinase. In agreement with this, treatment of the venom with fucoidan, a myotoxin inhibitor, abrogated the effect, whereas no inhibition was observed after incubation with the peptidomimetic metalloproteinase inhibitor Batimastat. Moreover, fucoidan significantly reduced venom-induced footpad edema. The myotoxic PLA(2 homologue, known to induce skeletal muscle necrosis, was able to induce cytotoxicity in smooth muscle cells in culture and to promote an increment in the permeability to propidium iodide in these cells. CONCLUSIONS/SIGNIFICANCE: Our observations indicate that B. asper venom affects collecting lymphatic vessels through the action of myotoxic PLA(2s on the smooth muscle of these vessels, inducing cell contraction and irreversible cell damage. This activity may play an important role in the pathogenesis of the pronounced local edema characteristic of viperid snakebite envenomation, as well as in the systemic biodistribution of the venom, thus representing a potential therapeutical target in these envenomations.

  17. Bothrops lanceolatus (Fer de lance) venom stimulates leukocyte migration into the peritoneal cavity of mice.

    Science.gov (United States)

    Arruda, Vanessa Alves; de Queiroz Guimarães, Alessandra; Hyslop, Stephen; de Araújo, Paulo Maria Ferreira; Bon, Cassian; de Araújo, Albetiza Lôbo

    2003-01-01

    The ability of Bothrops lanceolatus venom to induce neutrophil migration into the peritoneal cavity of mice was investigated. Intraperitoneal injection of venom caused dose- and time-dependent neutrophil migration, which peaked with 750 ng of venom/cavity 4h after venom injection. The neutrophil migration was significantly reduced by pretreatment with dexamethasone (0.5 mg/kg, s.c.), an indirect inhibitor of phospholipase A(2) (PLA(2)), and AA861 (0.01 mg/kg, s.c.), a 5-lipoxygenase inhibitor, but in contrast, was not modified by pretreatment with indomethacin (2 mg/kg, s.c.), an inhibitor of the cyclooxygenase pathway, meloxicam (5 mg/kg, s.c.), an inhibitor of the cyclooxygenase-2 pathway, or the PAF inhibitor WEB2086 (40 mg/kg, s.c.). Dexamethasone and AA861 also inhibited the neutrophil migration by 60% when administered immediately after venom injection, and the coadministration of these two drugs caused a 75% reduction in migration. BLV-induced neutrophil migration was not due to contamination by endotoxin since polymyxin B-treated venom retained its activity. Heating the venom (97 degrees C, 2 min) reduced the PLA(2) activity by 64% and this was accompanied by a corresponding reduction (68%) in neutrophil migration. These results suggest that arachidonate-derived lipoxygenase metabolites (possibly leukotriene B(4)) are involved in the chemotaxis observed. Macrophages may be an important source of these metabolites since the migratory response to venom was potentiated in mice pretreated with thioglycollate, but reduced when the peritoneal cavity was washed with sterile saline. PMID:12467667

  18. Snake Venom Metalloproteinases

    Directory of Open Access Journals (Sweden)

    Gâz Florea Şerban Andrei

    2016-03-01

    Full Text Available As more data are generated from proteome and transcriptome analysis revealing that metalloproteinases represent most of the Viperid and Colubrid venom components authors decided to describe in a short review a classification and some of the multiple activities of snake venom metalloproteinases. SVMPs are classified in three major classes (P-I, P-II and P-III classes based on the presence of various domain structures and according to their domain organization. Furthermore, P-II and P-III classes were separated in subclasses based on distinctive post-translational modifications. SVMPs are synthesized in a latent form, being activated through a Cys-switch mechanism similar to matrix metalloproteinases. Most of the metalloproteinases of the snake venom are responsible for the hemorrhagic events but also have fibrinogenolytic activity, poses apoptotic activity, activate blood coagulation factor II and X, inhibit platelet aggregation, demonstrating that SVMPs have multiple functions in addition to well-known hemorrhagic function.

  19. Bee-Wild about Pollinators!

    Science.gov (United States)

    Johnson, Bonnie; Kil, Jenny; Evans, Elaine; Koomen, Michele Hollingsworth

    2014-01-01

    With their sunny stripes and fuzzy bodies, bees are beloved--but unfortunately, they are in trouble. Bee decline, of both wild bees as well as managed bees like honey bees, has been in the news for the last several years. Habitat loss, diseases, pests, and pesticides have made it difficult for bees to survive in many parts of our world (Walsh…

  20. PERIPHERALLY SUPPRESSIVE EFFECTS OF KETAMINE ON SUBCUTANEOUS BEE VENOM-INDUCED PROLONGED,PERSISTENT FIRING OF SPINAL WIDE-DYNAMICRANGE NEURONS IN THE CAT%周围注射氯氨酮对皮下注射蜜蜂毒引起的猫脊髓广动力阈神经元长时程持续性放电增强的抑制效应

    Institute of Scientific and Technical Information of China (English)

    李会莉; 陈军; 罗层

    2000-01-01

    By using extracellular single unit recording technique, locally suppressive effects of a single dose of ketamine on sub-cutaneous (s. c. ) bee venom-induced increase in firing of wide dynamic-range (WDR) neurons in spinal dorsal horn were investi-gated on urcthane-chloralose anesthetized cats. Injection of bee venom s.c. into the cutaneous receptive field (RF) resulted in asingle phase of prolonged, persistently increased firing of WDR neurons over background activity for more than 1 h. Local pre-treatment with ketamine (100 mM, 0. 1 m l) into the center of RF where bee venom was injected produced a dramatic suppressionof the increased neuronal firing by 60% (3.10± 0.42 spikes/s, n= 5) when compared with saline pre-treated group (7.61 ± 0.17spikes/ s. n = 5 ). Moreover, local post-treatment with the same dose of ketamine also produced a profound suppression of the in-creased neuronal activity by 81% (1.51±0.06 spikes/s, n=5) when compared with the saline post-treated group (7.76±0.15spikes s, n=5). However, s.c. administration with the same dose of ketamine into a symmetrical region on the bee venom un-treated contralateral hindpaw produced no affection on the increased firing of the WDR neurons, suggesting that the suppressiveaction of local ketamine was not the result of systemic effects. The present result suggests that ketamine may exert its localantinociceptive effects mainly through the peripheral NMDA receptors in addition to its partially potential blocking effects onsodium and voltage-sensitive calcium channels.%通过应用单细胞细胞外电生理记录,在乌拉坦-氯醛糖合剂麻醉状态下,对在猫后爪局部注射单-剂量的氯氨酮对皮下让射蜜蜂毒引起的背角wDR神经元放电增强的抑制作用进行了研究。在wDR神经元周围感受野皮下注射蜜蜂毒可诱发出超过背景放电1小时的单相持续性放电增强。在感受野中心蜜蜂毒注射部位用氯氨酮(100 mmol/L,0.1 ml

  1. Roles of phospholipase A2 isoforms in swelling- and melittin-induced arachidonic acid release and taurine efflux in NIH3T3 fibroblasts

    DEFF Research Database (Denmark)

    Pedersen, Stine Helene Falsig; Poulsen, Kristian Arild; Lambert, Ian H.

    2006-01-01

    secretory sPLA2-V. Arachidonic acid release from swollen cells was partially inhibited by BEL and by the sPLA2-inhibitor manoalide. Cell swelling elicited BEL-sensitive arachidonic acid release from the nucleus, to which iPLA2-VIA localized. Exposure to the bee venom peptide melittin, to increase PLA2...

  2. Bee Pollen-Induced Anaphylaxis: A Case Report and Literature Review.

    Science.gov (United States)

    Choi, Jeong Hee; Jang, Young Sook; Oh, Jae Won; Kim, Cheol Hong; Hyun, In Gyu

    2015-09-01

    Bee pollen is pollen granules packed by honey bees and is widely consumed as natural healthy supplements. Bee pollen-induced anaphylaxis has rarely been reported, and its allergenic components have never been studied. A 40-year-old male came to the emergency room with generalized urticaria, facial edema, dyspnea, nausea, vomiting, abdominal pain, and diarrhea 1 hour after ingesting one tablespoon of bee pollen. Oxygen saturation was 91%. His symptoms resolved after injection of epinephrine, chlorpheniramine, and dexamethasone. He had seasonal allergic rhinitis in autumn. Microscopic examination of the bee pollen revealed Japanese hop, chrysanthemum, ragweed, and dandelion pollens. Skin-prick with bee pollen extracts showed positive reactions at 0.1 mg/mL (A/H ratio > 3+). Serum specific IgE to ragweed was 25.2, chrysanthemum 20.6, and dandelion 11.4 kU/L; however, Japanese hop, honey-bee venom and yellow-jacket venom were negative (UniCAP®, Thermo Fisher Scientific, Uppsala, Sweden). Enzyme-linked immunosorbent assay (ELISA) confirmed serum specific IgE to bee-pollen extracts, and an ELISA inhibition assay for evaluation of cross-allergenicity of bee pollen and other weed pollens showed more than 90% of inhibition with chrysanthemum and dandelion and ~40% inhibition with ragweed at a concentration of 1 μg/mL. Sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and IgE-immunoblot analysis revealed 9 protein bands (11, 14, 17, 28, 34, 45, 52, 72, and 90 kDa) and strong IgE binding at 28-34 kDa, 45 and 52 kDa. In conclusion, healthcare providers should be aware of the potential risk of severe allergic reactions upon ingestion of bee pollen, especially in patients with pollen allergy. PMID:25749764

  3. Biophysical mechanisms of phospholipase A2 activation and their use in liposome-based drug delivery

    DEFF Research Database (Denmark)

    Jørgensen, Kaj; Davidsen, Jesper; Mouritsen, Ole G.

    2002-01-01

    Secretory phospholipase A(2) (PLA(2)) is a ubiquitous water-soluble enzyme found in venom, pancreatic, and cancerous fluid. It is also known to play a role in membrane remodeling processes as well as in cellular signaling cascades. PLA(2) is interfacially active and functions mainly on organized...... reviewed. Results obtained from a variety of experimental and theoretical studies of PLA(2) activity on lipid-bilayer substrates are then presented which provide insight into the biophysical mechanisms of PLA(2) activation on lipid bilayers and liposomes of different composition. The insight into these...

  4. Expression of melittin gene in the venom gland of the Chinese honeybee, Apis cerana cerana

    OpenAIRE

    Li, Jiang-Hong; Zhang, Chuan-Xi; Tang, Zhen-Hua

    2005-01-01

    International audience Melittin is the principal component of bee venom. Melittin in Apis cerana (Ac-melt) is a single copy gene. A full length Ac-melt cDNA is 389 bp, with a single 191 bp intron in the genome. Its mRNA level was high during the first week of adult life and low during the rest of adult life. Melittin or its precursor could not be detected in the pupal stage. Melittin level increased rapidly to its maximum (about 95 $\\mu$g per worker bee) during the first 8-10 days of adult...

  5. The Experimental Study on Anti-bacterial Potency of Soyum Herbal-acupuncture, Hwangryunhaedoktang & Coptidis rhizoma on Staphylococcus aureus

    Directory of Open Access Journals (Sweden)

    Hyung-Sik Seo

    2006-06-01

    Full Text Available Objectives : The aim of this study was to observe prevention of allergic reactions of Sweet Bee Venom (removing enzyme components from Bee Venom. Methods: Content analysis of Sweet Bee Venom and Bee Venom was rendered using HPLC method and characterization of Anti-Sweet Bee Venom in Rabbit Serum. Clinical observation was conducted for inducement of allergic responses to Sweet BV. Results : 1. Analyzing melittin content using HPLC, Sweet BV contained 34.9% more melittin than Bee venom pharmacopuncture at same concentration. 2. Observing chromatogram of HPLC, removal of the enzyme was successfully rendered on Sweet BV. 3. The anti-serum of Sweet BV showed high titers against melittin and bee venom and relatively low titer against phospholipase A2. 4. After conducting approximately 3,000 cases of Sweet BV administration, not a single case of generalized anaphylatic reaction occurred in clinical observation. 5. Mild compared to the bee venom pharmacopuncture, Sweet BV showed some acute hypersensitive reactions of edema, itchiness, and aching locally. 6. Sweet BV was administered on six patients with previous history of suffering from generalized acute hypersensitive reactions with the bee venom. None of the patients showed allergic reactions with Sweet BV, suggesting it can effectively prevent anaphylatic shock which may occur after the bee venom pharmacopuncture procedure. Conclusion : Summarizing above results, Sweet Bee Venom appears to be an effective measurement against allergic reactions from the bee venom pharmacopuncture especially against anaphylatic shock.

  6. Component Analysis of Sweet BV and Clinical Trial on Antibody Titer and Allergic Reactions

    Directory of Open Access Journals (Sweden)

    Ki Rok, Kwon

    2006-06-01

    Full Text Available Objectives : The aim of this study was to observe prevention of allergic reactions of Sweet Bee Venom (removing enzyme components from Bee Venom. Methods : Content analysis of Sweet Bee Venom and Bee Venom was rendered using HPLC method and characterization of Anti-Sweet Bee Venom in Rabbit Serum. Clinical observation was conducted for inducement of allergic responses to Sweet BV. Results : 1. Analyzing melittin content using HPLC, Sweet BV contained 34.9% more melittin than Bee venom pharmacopuncture at same concentration. 2. Observing chromatogram of HPLC, removal of the enzyme was successfully rendered on Sweet BV. 3. The anti-serum of Sweet BV showed high titers against melittin and bee venom and relatively low titer against phospholipase A2. 4. After conducting approximately 3,000 cases of Sweet BV administration, not a single case of generalized anaphylatic reaction occurred in clinical observation. 5. Mild compared to the bee venom pharmacopuncture, Sweet BV showed some acute hypersensitive reactions of edema, itchiness, and aching locally. 6. Sweet BV was administered on six patients with previous history of suffering from generalized acute hypersensitive reactions with the bee venom. None of the patients showed allergic reactions with Sweet BV, suggesting it can effectively prevent anaphylatic shock which may occur after the bee venom pharmacopuncture procedure. Conclusion : Summarizing above results, Sweet Bee Venom appears to be an effective measurement against allergic reactions from the bee venom pharmacopuncture especially against anaphylatic shock.

  7. Venom of the Coral Snake Micrurus clarki: Proteomic Profile, Toxicity, Immunological Cross-Neutralization, and Characterization of a Three-Finger Toxin.

    Science.gov (United States)

    Lomonte, Bruno; Sasa, Mahmood; Rey-Suárez, Paola; Bryan, Wendy; Gutiérrez, José María

    2016-01-01

    Micrurus clarki is an uncommon coral snake distributed from the Southeastern Pacific of Costa Rica to Western Colombia, for which no information on its venom could be found in the literature. Using a 'venomics' approach, proteins of at least nine families were identified, with a moderate predominance of three-finger toxins (3FTx; 48.2%) over phospholipase A₂ (PLA₂; 36.5%). Comparison of this venom profile with those of other Micrurus species suggests that it may represent a more balanced, 'intermediate' type within the dichotomy between 3FTx- and PLA₂-predominant venoms. M. clarki venom was strongly cross-recognized and, accordingly, efficiently neutralized by an equine therapeutic antivenom against M. nigrocinctus, revealing their high antigenic similarity. Lethal activity for mice could be reproduced by a PLA₂ venom fraction, but, unexpectedly, not by fractions corresponding to 3FTxs. The most abundant venom component, hereby named clarkitoxin-I, was identified as a short-chain (type I) 3FTx, devoid of lethal effect in mice, whose target remains to be defined. Its amino acid sequence of 66 residues shows high similarity with predicted sequences of venom gland transcripts described for M. fulvius, M. browni, and M. diastema. PMID:27164141

  8. Snake venoms components with antitumor activity in murine melanoma cells; Componentes derivados de venenos de serpentes com acao antitumoral em celulas de melanoma murino

    Energy Technology Data Exchange (ETDEWEB)

    Queiroz, Rodrigo Guimaraes

    2012-07-01

    Despite the constant advances in the treatment of cancer, this disease remains one of the main causes of mortality worldwide. So, the development of new treatment modalities is imperative. Snake venom causes a variety of biological effects because they constitute a complex mixture of substances as disintegrins, proteases (serine and metalo), phospholipases A2, L-amino acid oxidases and others. The goal of the present work is to evaluate a anti-tumor activity of some snake venoms fractions. There are several studies of components derived from snake venoms with this kind of activity. After fractionation of snake venoms of the families Viperidae and Elapidae, the fractions were assayed towards murine melanoma cell line B16-F10 and fibroblasts L929. The results showed that the fractions of venom of the snake Notechis ater niger had higher specificity and potential antitumor activity on B16-F10 cell line than the other studied venoms. Since the components of this venom are not explored yet coupled with the potential activity showed in this work, we decided to choose this venom to develop further studies. The cytotoxic fractions were evaluated to identify and characterize the components that showed antitumoral activity. Western blot assays and zymography suggests that these proteins do not belong to the class of metallo and serine proteinases. (author)

  9. Are ticks venomous animals?

    Czech Academy of Sciences Publication Activity Database

    Cabezas-Cruz, A.; Valdés, James J.

    2014-01-01

    Roč. 11, JUL 2014 (2014), s. 47. ISSN 1742-9994 R&D Projects: GA MŠk(CZ) EE2.3.30.0032 Institutional support: RVO:60077344 Keywords : ticks * venom * secreted proteins * toxicoses * pathogens * convergence Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 3.051, year: 2014

  10. Generalist Bee Species on Brazilian Bee-Plant Interaction Networks

    OpenAIRE

    Astrid de Matos Peixoto Kleinert; Tereza Cristina Giannini

    2012-01-01

    Determining bee and plant interactions has an important role on understanding general biology of bee species as well as the potential pollinating relationship between them. Bee surveys have been conducted in Brazil since the end of the 1960s. Most of them applied standardized methods and had identified the plant species where the bees were collected. To analyze the most generalist bees on Brazilian surveys, we built a matrix of bee-plant interactions. We estimated the most generalist bees det...

  11. Unusual stability of messenger RNA in snake venom reveals gene expression dynamics of venom replenishment.

    OpenAIRE

    Currier, Rachel B.; Calvete, Juan J.; Sanz, Libia; Harrison, Robert A.; Rowley, Paul D.; Wagstaff, Simon C

    2012-01-01

    Venom is a critical evolutionary innovation enabling venomous snakes to become successful limbless predators; it is therefore vital that venomous snakes possess a highly efficient venom production and delivery system to maintain their predatory arsenal. Here, we exploit the unusual stability of messenger RNA in venom to conduct, for the first time, quantitative PCR to characterise the dynamics of gene expression of newly synthesised venom proteins following venom depletion. Quantitative PCR d...

  12. Gamma radiation effect on biological activity and enzymatic properties of snake venoms

    International Nuclear Information System (INIS)

    The effect of gamma radiation, from Co-60, on the biological activity and on some enzymatic activities, present in the venoms of Lachesis muta and Bothrops atrox, using samples of dried venom that had been irradiated at a dose of 0.1, 0.5 and 1.0 Mrad have been studied. Variations in the degree of hemorrhage and local necrosis were observed in albino mice injected subcutaneously with venoms of both types. The reduction of the biological activity was greater for the local hemorrhagic effect and was dependent on the doses of irradiation. The specific activity of various enzymes, present in both venoms, is affected by the gamma radiation, at a dose of 0.1 Mrad the order of increasing inactivation being: exonuclease (4%), phospholipase (24%), caseinolytic enzyme (20%), tamesterase (33%), a thrombine-like enzyme (40%), fibrinolytic enzyme (41%), 5'-nucleotidase (50%) and endonuclease (55%). The enzymatic inactivation was augmented by 0.5 and 1.0 Mrad, without maintaining an arithmetic relation. The enzyme of major resistance to the radiation was exonuclease, whereas 5'-nucleotidase and endonuclease were the most sensitive. No significant changes were observed in the spectrum of UV absorbtion (range 260 to 290 nm) nor in the contents of L-tyrosine in the irradiated venoms

  13. Snake Venom PLA2s Inhibitors Isolated from Brazilian Plants: Synthetic and Natural Molecules

    Directory of Open Access Journals (Sweden)

    B. M. A. Carvalho

    2013-01-01

    Full Text Available Ophidian envenomation is an important health problem in Brazil and other South American countries. In folk medicine, especially in developing countries, several vegetal species are employed for the treatment of snakebites in communities that lack prompt access to serum therapy. However, the identification and characterization of the effects of several new plants or their isolated compounds, which are able to inhibit the activities of snake venom, are extremely important and such studies are imperative. Snake venom contains several organic and inorganic compounds; phospholipases A2 (PLA2s are one of the principal toxic components of venom. PLA2s display a wide variety of pharmacological activities, such as neurotoxicity, myotoxicity, cardiotoxicity, anticoagulant, hemorrhagic, and edema-inducing effects. PLA2 inhibition is of pharmacological and therapeutic interests as these enzymes are involved in several inflammatory diseases. This review describes the results of several studies of plant extracts and their isolated active principles, when used against crude snake venoms or their toxic fractions. Isolated inhibitors, such as steroids, terpenoids, and phenolic compounds, are able to inhibit PLA2s from different snake venoms. The design of specific inhibitors of PLA2s might help in the development of new pharmaceutical drugs, more specific antivenom, or even as alternative approaches for treating snakebites.

  14. Neuromuscular action of Bothrops lanceolatus (Fer de lance) venom and a caseinolytic fraction.

    Science.gov (United States)

    Lôbo de Araújo, Albetiza; Donato, José Luiz; Leite, Gildo Bernardo; Prado-Franceschi, Júlia; Fontana, Marcos Dias; Bon, Cassian; Rodrigues Simioni, Léa

    2002-09-01

    A protein capable of inducing neuromuscular blockade in avian preparations and of depolarizing mouse diaphragm muscle was isolated from Bothrops lanceolatus venom using gel filtration and ion-exchange chromatography. The purified protein was a single chain polypeptide with an estimated molecular mass of 27.5 kDa by SDS-PAGE and had caseinolytic activity (13.3 units/mg), but no phospholipase A(2). B.lanceolatus venom (50 micro g/ml) and the caseinolytic protein (20 micro g/ml) produced contracture and progressive irreversible blockade (50% in 25+/-5 min (SEM) and 45+/-15 min, respectively), in indirectly stimulated chick biventer cervicis preparations. The contractile responses to acetylcholine (ACh; 37 and 74 micro M, n=6) were inhibited by venom and the caseinolytic protein, whereas those to potassium (13.4mM, n=6) were not. Membrane resting potential measurements in mouse hemidiaphragm preparations showed that B.lanceolatus venom and the purified protein caused depolarization which was prevented by D-tubocurarine (14.6mM). The venom produced a slight increase in the amplitude and frequency of miniature end-plate potentials, but this effect was not seen with the purified fraction. These results suggest that the purified protein acts exclusively post-synaptically. PMID:12220713

  15. A novel expression profile of the Loxosceles intermedia spider venomous gland revealed by transcriptome analysis.

    Science.gov (United States)

    Gremski, Luiza Helena; da Silveira, Rafael Bertoni; Chaim, Olga Meiri; Probst, Christian Macagnan; Ferrer, Valéria Pereira; Nowatzki, Jenifer; Weinschutz, Hellen Chris; Madeira, Humberto Maciel; Gremski, Waldemiro; Nader, Helena Bonciani; Senff-Ribeiro, Andrea; Veiga, Silvio Sanches

    2010-12-01

    Spiders of the Loxosceles genus are cosmopolitan, and their venom components possess remarkable biological properties associated with their ability to act upon different molecules and receptors. Accidents with Loxosceles intermedia specimens are recognized as a public health problem in the south of Brazil. To describe the transcriptional profile of the L. intermedia venom gland, we generated a wide cDNA library, and its transcripts were functionally and structurally analyzed. After initial analyses, 1843 expressed sequence tags (ESTs) produced readable sequences that were grouped into 538 clusters, 281 of which were singletons. 985 reads (53% of total ESTs) matched to known proteins. Similarity searches showed that toxin-encoding transcripts account for 43% of the total library and comprise a great number of ESTs. The most frequent toxins were from the LiTx family, which are known for their insecticidal activity. Both phospholipase D and astacin-like metalloproteases toxins account for approximately 9% of total transcripts. Toxins components such as serine proteases, hyaluronidases and venom allergens were also found but with minor representation. Almost 10% of the ESTs encode for proteins involved in cellular processes. These data provide an important overview of the L. intermedia venom gland expression scenario and revealed significant differences from profiles of other spiders from the Loxosceles genus. Furthermore, our results also confirm that this venom constitutes an amazing source of novel compounds with potential agrochemical, industrial and pharmacological applications. PMID:20644878

  16. Effects of cosmetics containing purified honeybee (Apis mellifera L.) venom on acne vulgaris

    OpenAIRE

    Sang Mi Han

    2013-01-01

    OBJECTIVE: Acne vulgaris is a chronic dermatologic problem with multiple factors involved in its pathogenesis. Alternative solutions to acne treatment were instigated by antibiotic resistance despite of its extensive use. Purified bee venom (PBV) has been proposed as a promising candidate for that purpose. The present study was designed to confirm the antibacterial effect of PBV and access the efficacy of cosmetics containing PBV in subjects with acne vulgaris. METHODS: The skin bacterium Pro...

  17. Synergistic Effects Induced by Combined Treatments of Aqueous Extract of Propolis and Venom

    OpenAIRE

    Drigla, Flaviu; Balacescu, Ovidiu; VISAN, SIMONA; BISBOACA, SIMONA ELENA; BERINDAN-NEAGOE, IOANA; Liviu Alexandru MARGHITAS

    2016-01-01

    Background and aims Breast cancer is a heterogeneous disease and the leading cause of cancer mortality worldwide. Triple negative breast cancer (TNBC) is considered to be one of the most aggressive breast neoplasia due to failure of chemotherapy response. Thus, there is an urgent need of finding alternative therapies for TNBC. This study was designed to evaluate the synergistic effect induced by propolis and bee venom on luminal (MCF-7) and TNBC (Hs578T) cell lines. Methods In order to evalua...

  18. Accidents with venomous and poisonous animals: their impact on occupational health in Colombia

    OpenAIRE

    Juan P. Gómez C

    2011-01-01

    Venomous or poisonous animals are a very common cause of accidents in Colombia. Such accidents occur due to vertebrates such as snakes and fish or invertebrates such as scorpions, spiders, bees, etc. The most affected individuals are young people ages 15 to 45. They are mainly farmers and fishermen. These events can be considered work accidents given their characteristics. Nevertheless, the occupational risk insurance companies, the central Colombian government, and the regional, departmental...

  19. African adders: partial characterization of snake venoms from three Bitis species of medical importance and their neutralization by experimental equine antivenoms.

    Directory of Open Access Journals (Sweden)

    Danielle Paixão-Cavalcante

    2015-02-01

    Full Text Available An alarming number of fatal accidents involving snakes are annually reported in Africa and most of the victims suffer from permanent local tissue damage and chronic disabilities. Envenomation by snakes belonging to the genus Bitis, Viperidae family, are common in Sub-Saharan Africa. The accidents are severe and the victims often have a poor prognosis due to the lack of effective specific therapies. In this study we have biochemically characterized venoms from three different species of Bitis, i.e., Bitis arietans, Bitis gabonica rhinoceros and Bitis nasicornis, involved in the majority of the human accidents in Africa, and analyzed the in vitro neutralizing ability of two experimental antivenoms.The data indicate that all venoms presented phospholipase, hyaluronidase and fibrinogenolytic activities and cleaved efficiently the FRET substrate Abz-RPPGFSPFRQ-EDDnp and angiotensin I, generating angiotensin 1-7. Gelatinolytic activity was only observed in the venoms of B. arietans and B. nasicornis. The treatment of the venoms with protease inhibitors indicated that Bitis venoms possess metallo and serinoproteases enzymes, which may be involved in the different biological activities here evaluated. Experimental antivenoms produced against B. arietans venom or Bitis g. rhinoceros plus B. nasicornis venoms cross-reacted with the venoms from the three species and blocked, in different degrees, all the enzymatic activities in which they were tested.These results suggest that the venoms of the three Bitis species, involved in accidents with humans in the Sub-Saharan Africa, contain a mixture of various enzymes that may act in the generation and development of some of the clinical manifestations of the envenomations. We also demonstrated that horse antivenoms produced against B. arietans or B. g. rhinoceros plus B. nasicornis venoms can blocked some of the toxic activities of these venoms.

  20. Extraction and partial characterization of venom from the Colombian spider Pamphobeteus aff. nigricolor (Aranae:Theraphosidae).

    Science.gov (United States)

    Estrada-Gomez, Sebastian; Vargas Muñoz, Leidy Johana; Quintana Castillo, Juan C

    2013-12-15

    We report the first studies of characterization and extraction of the Pamphobeteus aff. nigricolor (Pocock, 1901) (Aranae:Theraphosidae) venom done in Colombia using the electro-stimulation technique previous anesthesia with isofluorane. After each extraction process, a low viscosity, colorless venom was obtained. This venom showed a 1.01 mg/μl density and a pH of 5. The humidity percentage did not show a significance difference between males and females (P > 0.05) with a general media of 77.49 ± 1.74%. In all cases the venom yielded was variable between males and females, with a media of 22.45 ± 5.17 mg (wet weight) and 4.58 ± 0.94 mg (dry weigh), obtaining larger amounts in females, 28.34 ± 7.49 mg and 5.69 ± 1.36 (wet and dry weight respectively). Venom showed a hemolytic activity dependent of enzymatic active phospholipase and neither coagulant nor proteolytic activities were observed. Electrophoretic profile showed a main protein content with a molecular mass below 14 kDa. RP-HPLC venom profile revealed a difference among male and female venom's content where 17 and 21 main fractions were obtained respectively. Three peptides, Theraphotoxin-Pn1a, Theraphotoxin-Pn1b and Theraphotoxin-Pn2a, were identified using HPLC-nESI-MS/MS. These peptides showed a high identity with other peptides found on Theraphosides which are proved to affect voltage-gated calcium channels. PMID:24140923

  1. Snake venom derived molecules in tumor angiogenesis and its application in cancer therapy; an overview.

    Science.gov (United States)

    Dhananjaya, B L; Sivashankari, P R

    2015-01-01

    Snake venom is a complex mixture of biologically and pharmacologically active components, comprising hydrolytic enzymes, non-enzymatic proteins/peptides, and small amounts of organic and inorganic molecules. The venom components are known to vary with geographic location, season, species and age of the snakes. The role of the venom in the snake is not primarily for self-defense, but in prey immobilization and its subsequent digestion. Hence, several digestive enzymes in venoms, in addition to their hydrolytic activity have evolved to interfere in diverse physiological processes that help in the immobilization of prey/victim. As snake components are capable of modulating the physiological response of envenomated prey/victim, they show promise as potential pharmacological tools, as drug leads and in diagnostic applications. This, in a practical sense to be a reality has to be linked to the advances in toxinology that provide investigators with an understanding of the pharmacodynamics of toxins together with improved understanding of the etiology of many human diseases and identification of potential sites for therapeutic intervention. This review aims at providing an overview on snake venom toxins and their derivatives that have potential anti-angiogenic effects for cancer treatment. Some of the anti-angiogenic components of snake venom like Snake venom metalloproteinases (SVMPs), Disintegrins, Phospholipases A2 (PLA2), CType Lectins (CLP), Vascular Apoptosis inducing Proteins (VAP) and L-Amino Acid Oxidases (LAAO) are discussed. This review aims at giving an overall view of these molecules and their mechanism of action as an effective antiangiogenic agent towards the treatment of cancer. PMID:25714377

  2. Venom gland EST analysis of the saw-scaled viper, Echis ocellatus, reveals novel alpha9beta1 integrin-binding motifs in venom metalloproteinases and a new group of putative toxins, renin-like aspartic proteases.

    Science.gov (United States)

    Wagstaff, Simon C; Harrison, Robert A

    2006-08-01

    Echis ocellatus is the most medically important snake in West Africa. However, the composition of its venom and the differential contribution of these venom components to the severe haemorrhagic and coagulopathic pathology of envenoming are poorly understood. To address this situation we assembled a toxin transcriptome based upon 1000 expressed sequence tags (EST) from a cDNA library constructed from pooled venom glands of 10 individual E. ocellatus. We used a variety of bioinformatic tools to construct a fully annotated venom-toxin transcriptome that was interrogated with a combination of BLAST annotation, gene ontology cataloguing and disintegrin-motif searching. The results of these analyses revealed an unusually abundant and diverse expression of snake venom metalloproteinases (SVMP) and a broad toxin-expression profile including several distinct isoforms of bradykinin-potentiating peptides, phospholipase A(2), C-type lectins, serine proteinases and l-amino oxidases. Most significantly, we identified for the first time a conserved alpha(9)beta(1) integrin-binding motif in several SVMPs, and a new group of putative venom toxins, renin-like aspartic proteases. PMID:16713134

  3. Melittin activates TRPV1 receptors in primary nociceptive sensory neurons via the phospholipase A2 cascade pathways

    OpenAIRE

    Du, Yi-Ru; Xiao, Yong; Lu, Zhuo-Min; Ding, Jing; Xie, Fang; Fu, Han; Wang, Yan; Strong, Judith A.; Zhang, Jun-Ming; Chen, Jun

    2011-01-01

    Previous studies demonstrated that melittin, the main peptide in bee venom, could cause persistent spontaneous pain, primary heat and mechanical hyperalgesia, and enhance the excitability of spinal nociceptive neurons. However, the underlying mechanism of melittin-induced cutaneous hypersensitivity is unknown. Effects of melittin applied topically to acutely dissociated rat dorsal root ganglion neurons were studied using whole-cell patch clamp and calcium imaging techniques. Melittin induced ...

  4. Danger in the reef: Proteome, toxicity, and neutralization of the venom of the olive sea snake, Aipysurus laevis

    DEFF Research Database (Denmark)

    Laustsen, Andreas Hougaard; Lohse, Brian

    2015-01-01

    (71.2%), three-finger toxins (3FTx; 25.3%), cysteine-rich secretory proteins (CRISP; 2.5%), and traces of a com- plement control module protein (CCM; 0.2%). Using a Toxicity Score, the most lethal components were determined to be short neurotoxins. Whole venom had an intravenous LD50 of 0.07 mg/kg in...... mice and showed a high phospholipase A2 activity, but no proteinase activity in vitro. Preclinical assessment of neutralization and ELISA immunoprofiling showed that BioCSL Sea Snake Antivenom was effective in cross-neutralizing A. laevis venom with an ED50 of 821 mg venom per mL antivenom, with a...

  5. A New Phospholipase A₂ from Lachesis muta rhombeata: Purification, Biochemical and Comparative Characterization with Crotoxin B.

    Science.gov (United States)

    Cordeiro, Francielle A; Perini, Tibério G K; Bregge-Silva, Cristiane; Cremonez, Caroline M; Rodrigues, Renata S; Boldrini-França, Johara; Bordon, Karla de C F; De Souza, Dayane L N; Ache, David C; de M Rodrigues, Veridiana; Dos Santos, Wagner F; Rosa, Jose C; Arantesa, Eliane C

    2015-01-01

    Phospholipases A2 (PLA2s) are enzymes responsible for inflammatory effects, edema formation, myotoxicity, neurotoxicity and other manifestations from envenoming. In this paper we report the isolation and biochemical characterization of Lmr-PLA2, the first acidic PLA2 found in Lachesis muta rhombeata venom. Furthermore, this study compared biological effects of Lmr-PLA2 and crotoxin B (CB), a PLA2 from Crotalus durissus terrificus venom. Lmr-PLA2 was isolated by molecular exclusion and reversed phase chromatography. The purified enzyme showed a molecular mass of 13,975 Da, pI of 5.46 and its partial amino acid sequence showed a high identity with PLA2s already described in the literature. In addition, this enzyme possesses the residue D49 in its amino acid sequence, indicating that it is a catalytically active PLA2. Lmr-PLA2 presented high phospholipase activity and was able to inhibit platelet aggregation. Studies of biochemical characterization of new PLA2s, as Lmr-PLA2, are relevant since they help to clarify the structure-function relationship of this important class of toxins. PMID:26145564

  6. Bee venom and cancer%蜂毒与癌症

    Institute of Scientific and Technical Information of China (English)

    关绥平

    2007-01-01

    近年来,癌症患者越来越多,患者的年龄越来越年轻化,病情也越来越复杂;发现病症晚期和复发转移的患者越来越多,患者死亡率也越来越高。很多国家的医务工作者正在运用蜂毒疗法抑癌治癌。蜂毒是癌症和疑难杂症的克星,现已受人们重视与认可。

  7. Novel antimicrobial peptides isolated from the venom of wild bees

    Czech Academy of Sciences Publication Activity Database

    Čeřovský, Václav; Monincová, Lenka; Slaninová, Jiřina; Fučík, Vladimír; Borovičková, Lenka; Hovorka, Oldřich; Voburka, Zdeněk; Cvačka, Josef; Bednárová, Lucie; Buděšínský, Miloš; Straka, J.

    2009-01-01

    Roč. 276, Suppl. 1 (2009), s. 106-106. ISSN 1742-464X. [FEBS Congress /34/. 04.07.2009-09.07.2009, Praha] Institutional research plan: CEZ:AV0Z40550506 Keywords : linear cationic alpha-helical antimicrobial peptides * Edman degradation * mass spectrometry Subject RIV: CC - Organic Chemistry

  8. Neuroprotective and Neurotherapeutic Effects of Bee Venom on Neurodegenerative Diseases

    OpenAIRE

    Miran K. Rakha

    2013-01-01

    Acute and chronic neurodegenerative diseases are illnesses associated with high morbidity and mortality, and few or no effective options are available for their treatment. A characteristic of many neurodegenerative diseases — which include stroke, brain trauma, spinal cord injury, amyotrophic lateral sclerosis, Huntington’s disease, Alzheimer’s disease, and Parkinson’s disease — is neuronal cell death. Given that central nervous system tissue has very limited, if any, regenerative capacity, i...

  9. Venom of the Coral Snake Micrurus clarki: Proteomic Profile, Toxicity, Immunological Cross-Neutralization, and Characterization of a Three-Finger Toxin

    Directory of Open Access Journals (Sweden)

    Bruno Lomonte

    2016-05-01

    Full Text Available Micrurus clarki is an uncommon coral snake distributed from the Southeastern Pacific of Costa Rica to Western Colombia, for which no information on its venom could be found in the literature. Using a ‘venomics’ approach, proteins of at least nine families were identified, with a moderate predominance of three-finger toxins (3FTx; 48.2% over phospholipase A2 (PLA2; 36.5%. Comparison of this venom profile with those of other Micrurus species suggests that it may represent a more balanced, ‘intermediate’ type within the dichotomy between 3FTx- and PLA2-predominant venoms. M. clarki venom was strongly cross-recognized and, accordingly, efficiently neutralized by an equine therapeutic antivenom against M. nigrocinctus, revealing their high antigenic similarity. Lethal activity for mice could be reproduced by a PLA2 venom fraction, but, unexpectedly, not by fractions corresponding to 3FTxs. The most abundant venom component, hereby named clarkitoxin-I, was identified as a short-chain (type I 3FTx, devoid of lethal effect in mice, whose target remains to be defined. Its amino acid sequence of 66 residues shows high similarity with predicted sequences of venom gland transcripts described for M. fulvius, M. browni, and M. diastema.

  10. Inhibitory effect of a Brazilian marine brown alga Spatoglossum schröederi on biological activities of Lachesis muta snake venom

    Directory of Open Access Journals (Sweden)

    Thaisa Francielle Souza Domingos

    2012-08-01

    Full Text Available The ability of crude extracts of the brown seaweed Spatoglossum schröederi to counteract some of the biological activities of Lachesis muta snake venom was evaluated. In vitro assays showed that only the extract of S. schröederi prepared in ethyl acetate was able to inhibit the clotting of fibrinogen induced by L. muta venom. On the other hand, all extracts were able to inhibit partially the hemolysis caused by venom and those prepared in dichloromethane or ethyl acetate fully neutralized the proteolysis and hemorrhage produced by the venom. Moreover, the dichloromethane or ethyl acetate extracts inhibited the hemolysis induced by an isolated phospholipase A2 from L. muta venom, called LM-PLA2-I. In contrast, the hexane extract failed to protect mice from hemorrhage or to inhibit proteolysis and clotting. These results show that the polarity of the solvent used to prepare the extracts of S. schröederi algae influenced the potency of the inhibitory effect of the biological activities induced by L. muta venom. Thus, the seaweed S. schröederi may be a promising source of natural inhibitors of the enzymes involved in biological activities of L. muta venom.

  11. Widespread occurrence of honey bee pathogens in solitary bees.

    Science.gov (United States)

    Ravoet, Jorgen; De Smet, Lina; Meeus, Ivan; Smagghe, Guy; Wenseleers, Tom; de Graaf, Dirk C

    2014-10-01

    Solitary bees and honey bees from a neighbouring apiary were screened for a broad set of putative pathogens including protists, fungi, spiroplasmas and viruses. Most sampled bees appeared to be infected with multiple parasites. Interestingly, viruses exclusively known from honey bees such as Apis mellifera Filamentous Virus and Varroa destructor Macula-like Virus were also discovered in solitary bees. A microsporidium found in Andrena vaga showed most resemblance to Nosema thomsoni. Our results suggest that bee hives represent a putative source of pathogens for other pollinators. Similarly, solitary bees may act as a reservoir of honey bee pathogens. PMID:25196470

  12. Fibrinogenolytic toxin from Indian monocled cobra (Naja kaouthia) venom

    Indian Academy of Sciences (India)

    C Chandra Sekhar; Dibakar Chakrabarty

    2011-06-01

    A fibrinogenolytic toxin of molecular weight 6.5 kDa has been purified from the venom of Indian monocled cobra (Naja kaouthia) by repeated cation exchange chromatography on CM-sephadex C-50. The purified toxin did not show any phospholipase activity but was mildly hemolytic on human erythrocytes. This toxin, called Lahirin, cleaved fibrinogen in a dose- and time-dependent manner. The digestion process apparently started with the A chain, and gradually other lower-molecular-weight chains were also cleaved to low-molecular-weight peptides. The fibrinolytic activity was completely lost after treatment with ethylene di-amine tetra acetic acid (EDTA). However, exposure to 100°C for 1 min or pre-treatment with phenyl methyl sulfonyl fluoride (PMSF) did not affect the fibrinolytic activity. Cleavage of di-sulphide bonds by -mercaptoethanol or unfolding the protein with 4 M urea caused complete loss of activity of pure Lahirin.

  13. Ophiophagus hannah Venom: Proteome, Components Bound by Naja kaouthia Antivenin and Neutralization by N. kaouthia Neurotoxin-Specific Human ScFv

    Directory of Open Access Journals (Sweden)

    Witchuda Danpaiboon

    2014-05-01

    Full Text Available Venomous snakebites are an important health problem in tropical and subtropical countries. King cobra (Ophiophagus hannah is the largest venomous snake found in South and Southeast Asia. In this study, the O. hannah venom proteome and the venom components cross-reactive to N. kaouthia monospecific antivenin were studied. O. hannah venom consisted of 14 different protein families, including three finger toxins, phospholipases, cysteine-rich secretory proteins, cobra venom factor, muscarinic toxin, L-amino acid oxidase, hypothetical proteins, low cysteine protein, phosphodiesterase, proteases, vespryn toxin, Kunitz, growth factor activators and others (coagulation factor, endonuclease, 5’-nucleotidase. N. kaouthia antivenin recognized several functionally different O. hannah venom proteins and mediated paratherapeutic efficacy by rescuing the O. hannah envenomed mice from lethality. An engineered human ScFv specific to N. kaouthia long neurotoxin (NkLN-HuScFv cross-neutralized the O. hannah venom and extricated the O. hannah envenomed mice from death in a dose escalation manner. Homology modeling and molecular docking revealed that NkLN-HuScFv interacted with residues in loops 2 and 3 of the neurotoxins of both snake species, which are important for neuronal acetylcholine receptor binding. The data of this study are useful for snakebite treatment when and where the polyspecific antivenin is not available. Because the supply of horse-derived antivenin is limited and the preparation may cause some adverse effects in recipients, a cocktail of recombinant human ScFvs for various toxic venom components shared by different venomous snakes, exemplified by the in vitro produced NkLN-HuScFv in this study, should contribute to a possible future route for an improved alternative to the antivenins.

  14. Induction of Specific Immunotherapy with Hymenoptera Venoms Using Ultrarush Regimen in Children: Safety and Tolerance

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    Alice Köhli-Wiesner

    2012-01-01

    Full Text Available Background & Objective. Ultrarush induction for specific venom immunotherapy has been shown to be reliable and efficacious in adults. In this study its safety and tolerance in children was evaluated. Methods. Retrospective analysis of 102 ultrarush desensitizations carried out between 1997 and 2005 in 94 children, aged 4 to 15 years. Diagnosis and selection for immunotherapy were according to recommendations of the European Academy of Allergy and Clinical Immunology. Systemic adverse reactions (SARs were described using the classification of H. L. Mueller. Results. All patients reached the cumulative dose of 111.1 μg hymenoptera venom within 210 minutes. Six patients (6% had allergic reactions grade I; 2 patients (2% grade II and 5 patients (5% grade III. Three patients (3% showed unclassified reactions. SARs did not occur in the 15 patients aged 4 to 8 years and they were significantly more frequent in girls (29% compared with boys (12% (=0.034, multivariant analysis and in bee venom extract treated patients (20% compared to those treated with wasp venom extract (8% (OR 0.33, 95% Cl 0.07–1.25. Conclusion. Initiation of specific immunotherapy by ultrarush regimen is safe and well tolerated in children and should be considered for treating children with allergy to hymenoptera venom.

  15. Assaying nonspecific phospholipase C activity

    Czech Academy of Sciences Publication Activity Database

    Pejchar, Přemysl; Günther, F.E.S.; Martinec, Jan

    Vol. 1009. New York City: Humana Press, 2013 - (Munnik, T.; Heilmann, I.), s. 193-203. (Methods in Molecular Biology). ISBN 978-1-62703-400-5 R&D Projects: GA ČR(CZ) GAP501/12/1942; GA ČR(CZ) GPP501/12/P950 Institutional research plan: CEZ:AV0Z50380511 Keywords : Bodipy * Diacylglycerol * Nonspecific phospholipase C Subject RIV: ED - Physiology

  16. Structural Characterization of Myotoxic Ecarpholin S From Echis carinatus Venom

    Energy Technology Data Exchange (ETDEWEB)

    Zhou, X.; Tan, T; Valiyaveettil, S; Go, M; Kini, R; Velazquez-Campoy, A; Sivaraman, J

    2008-01-01

    Phospholipase A2 (PLA2), a common toxic component of snake venom, has been implicated in various pharmacological effects. Ecarpholin S, isolated from the venom of the snake Echis carinatus sochureki, is a phospholipase A2 (PLA2) belonging to the Ser49-PLA2 subgroup. It has been characterized as having low enzymatic but potent myotoxic activities. The crystal structures of native ecarpholin S and its complexes with lauric acid, and its inhibitor suramin, were elucidated. This is the first report of the structure of a member of the Ser49-PLA2 subgroup. We also examined interactions of ecarpholin S with phosphatidylglycerol and lauric acid, using surface plasmon resonance, and of suramin with isothermal titration calorimetry. Most Ca2+-dependent PLA2 enzymes have Asp in position 49, which plays a crucial role in Ca2+ binding. The three-dimensional structure of ecarpholin S reveals a unique conformation of the Ca2+-binding loop that is not favorable for Ca2+ coordination. Furthermore, the endogenously bound fatty acid (lauric acid) in the hydrophobic channel may also interrupt the catalytic cycle. These two observations may account for the low enzymatic activity of ecarpholin S, despite full retention of the catalytic machinery. These observations may also be applicable to other non-Asp49-PLA2 enzymes. The interaction of suramin in its complex with ecarpholin S is quite different from that reported for the Lys49-PLA2/suramin complex, where the interfacial recognition face (i-face), C-terminal region, and N-terminal region of ecarpholin S play important roles. This study provides significant structural and functional insights into the myotoxic activity of ecarpholin S and, in general, of non-Asp49-PLA2 enzymes.

  17. Display of wasp venom allergens on the cell surface of Saccharomyces cerevisiae

    Directory of Open Access Journals (Sweden)

    Poulsen Lars K

    2010-09-01

    Full Text Available Abstract Background Yeast surface display is a technique, where the proteins of interest are expressed as fusions with yeast surface proteins and thus remain attached to the yeast cell wall after expression. Our purpose was to study whether allergens expressed on the cell surface of baker's yeast Saccharomyces cerevisiae preserve their native allergenic properties and whether the yeast native surface glycoproteins interfere with IgE binding. We chose to use the major allergens from the common wasp Vespula vulgaris venom: phospholipase A1, hyaluronidase and antigen 5 as the model. Results The proteins were expressed on the surface as fusions with a-agglutinin complex protein AGA2. The expression was confirmed by fluorescent cytometry (FACS after staining the cells with antibody against a C-tag attached to the C-terminal end of the allergens. Phospholipase A1 and hyaluronidase retained their enzymatic activities. Phospholipase A1 severely inhibited the growth of the yeast cells. Antigen 5 - expressing yeast cells bound IgE antibodies from wasp venom allergic patient sera but not from control sera as demonstrated by FACS. Moreover, antigen 5 - expressing yeast cells were capable of mediating allergen-specific histamine release from human basophils. Conclusions All the three major wasp venom allergens were expressed on the yeast surface. A high-level expression, which was observed only for antigen 5, was needed for detection of IgE binding by FACS and for induction of histamine release. The non-modified S. cerevisiae cells did not cause any unspecific reaction in FACS or histamine release assay despite the expression of high-mannose oligosaccharides. In perspective the yeast surface display may be used for allergen discovery from cDNA libraries and possibly for sublingual immunotherapy as the cells can serve as good adjuvant and can be produced in large amounts at a low price.

  18. Quantifying Demyelination in NK venom treated nerve using its electric circuit model

    Science.gov (United States)

    Das, H. K.; Das, D.; Doley, R.; Sahu, P. P.

    2016-03-01

    Reduction of myelin in peripheral nerve causes critical demyelinating diseases such as chronic inflammatory demyelinating polyneuropathy, Guillain-Barre syndrome, etc. Clinical monitoring of these diseases requires rapid and non-invasive quantification of demyelination. Here we have developed formulation of nerve conduction velocity (NCV) in terms of demyelination considering electric circuit model of a nerve having bundle of axons for its quantification from NCV measurements. This approach has been validated and demonstrated with toad nerve model treated with crude Naja kaouthia (NK) venom and also shows the effect of Phospholipase A2 and three finger neurotoxin from NK-venom on peripheral nerve. This opens future scope for non-invasive clinical measurement of demyelination.

  19. Purification and characterization of an organ specific haemorrhagic toxin from Vipera russelli russelli (Russell's viper) venom.

    Science.gov (United States)

    Kole, L; Chakrabarty, D; Datta, K; Bhattacharyya, D

    2000-04-01

    A haemorrhagic toxin (VRR-12) from Vipera russelli russelli (Russell's viper) venom has been purified by ion-exchange chromatography on CM-Sephadex C-50 followed by size-exclusion HPLC to electrophoretically homogeneous state. It is a 12 kDa single polypeptide having 1 mole of Zn+2 ion. This toxin induces intense intestinal haemorrhage and to a lesser extent skeletal muscle haemorrhage in mice. It does not show detectable proteolytic and esterolytic activity with selected substrates under specified conditions, haemolytic and phospholipase activity. When VRR-12, preincubated with bivalent antiserum against Saw-scaled and Russell's viper venom or EDTA was injected, haemorrhagic activity was not reduced, on the other hand preincubation with phenylmethyl sulphonyl fluoride reduced the activity markedly. Biodistribution studies with 125I VRR-12 show that haemorrhagic manifestation by this toxin is not a direct function of the fraction of the totally administered toxin distributed to that tissue. PMID:10983422

  20. Bioactive components in fish venoms.

    Science.gov (United States)

    Ziegman, Rebekah; Alewood, Paul

    2015-05-01

    Animal venoms are widely recognized excellent resources for the discovery of novel drug leads and physiological tools. Most are comprised of a large number of components, of which the enzymes, small peptides, and proteins are studied for their important bioactivities. However, in spite of there being over 2000 venomous fish species, piscine venoms have been relatively underrepresented in the literature thus far. Most studies have explored whole or partially fractioned venom, revealing broad pharmacology, which includes cardiovascular, neuromuscular, cytotoxic, inflammatory, and nociceptive activities. Several large proteinaceous toxins, such as stonustoxin, verrucotoxin, and Sp-CTx, have been isolated from scorpaenoid fish. These form pores in cell membranes, resulting in cell death and creating a cascade of reactions that result in many, but not all, of the physiological symptoms observed from envenomation. Additionally, Natterins, a novel family of toxins possessing kininogenase activity have been found in toadfish venom. A variety of smaller protein toxins, as well as a small number of peptides, enzymes, and non-proteinaceous molecules have also been isolated from a range of fish venoms, but most remain poorly characterized. Many other bioactive fish venom components remain to be discovered and investigated. These represent an untapped treasure of potentially useful molecules. PMID:25941767

  1. Detection of proteins antigenically related to Bothrops asper myotoxin in crotaline snake venoms.

    Science.gov (United States)

    Lomonte, B; Moreno, E; Gutiérrez, J M

    1987-01-01

    The presence of components antigenically related to Bothrops asper myotoxin was investigated by Western blotting and immunoelectrophoretic techniques. B. asper myotoxin is a non-glycosylated monomeric phospholipase A with a molecular weight by SDS-PAGE of 16,000 and isoelectric point of pH 9.8-10.0. Results showed that proteins in the venoms of B. nummifer, B. godmani, B. schlegelii, B. picadoi, and Agkistrodon bilineatus were recognized by monospecific antibodies to B. asper myotoxin raised in rabbit and sheep. Western blotting indicated that cross-reacting proteins have a molecular weight of 16,000, with the exception of that of B. picadoi, which is of 24,000 mol. wt. However, immunoelectrophoresis indicated that these components are highly heterogeneous in charge, ranging from basic to acidic proteins. The cross-reacting component(s) present in newborn B. asper venom has a different charge from that of the 'adult-type'. Venoms from newborn specimens showed an additional cross-reacting band of 18,000 mol. wt. Myotoxin is an abundant component in adult B. asper venom. Myotoxin-antimyotoxin complexes had different electrophoretic mobilities in rocket immunoelectrophoresis depending upon the species in which monospecific immune sera were produced. PMID:2448918

  2. Pharmacological characterization of rat paw edema induced by Naja haje arabica venom

    Directory of Open Access Journals (Sweden)

    A. K. Al-Asmari

    2005-03-01

    Full Text Available This investigation was performed in order to assess the inflammatory response induced by Naja haje arabica venom (NhaV in rat hind paw. The inflammatory response was estimated by measuring the edema with a Plethysmometer. The venom (0.625-10mug/paw produced a dose and time-dependent increase in non-hemorrhagic paw edema. The response to NhaV was maximal within 15 min and disappeared in 24 h. Five mug/paw of NhaV was chosen to test the effect of various drugs on the edema induced by this venom. Quinacrine (QNC, a phospholipase A2 (PLA2 inhibitor, and dipyridamole (DPM, an adenosine transport inhibitor, attenuated venom-induced edema in rat paw (P<0.001. Commercially available antivenom was ineffective when administered intravenously, whereas its local administration with NhaV attenuated the edema formation (P<0.001. In conclusion, NhaV-induced edema in rat paw involves PLA2 and adenosine mechanisms. Additionally, the use of polyspecific antivenom, intravenously, was ineffective in preventing NhaV-induced edema.

  3. Sulfated Galactan from Palisada flagellifera Inhibits Toxic Effects of Lachesis muta Snake Venom

    Directory of Open Access Journals (Sweden)

    Ana Cláudia Rodrigues da Silva

    2015-06-01

    Full Text Available In Brazil, snakebites are a public health problem and accidents caused by Lachesis muta have the highest mortality index. Envenomation by L. muta is characterized by systemic (hypotension, bleeding and renal failure and local effects (necrosis, pain and edema. The treatment to reverse the evolution of all the toxic effects is performed by injection of antivenom. However, such therapy does not effectively neutralize tissue damage or any other local effect, since in most cases victims delay seeking appropriate medical care. In this way, alternative therapies are in demand, and molecules from natural sources have been exhaustively tested. In this paper, we analyzed the inhibitory effect of a sulfated galactan obtained from the red seaweed Palisada flagellifera against some toxic activities of L. muta venom. Incubation of sulfated galactan with venom resulted in inhibition of hemolysis, coagulation, proteolysis, edema and hemorrhage. Neutralization of hemorrhage was also observed when the galactan was administered after or before the venom injection; thus mimicking a real in vivo situation. Moreover, the galactan blocked the edema caused by a phospholipase A2 isolated from the same venom. Therefore, the galactan from P. flagellifera may represent a promising tool to treat envenomation by L. muta as a coadjuvant for the conventional antivenom.

  4. Sulfated Galactan from Palisada flagellifera Inhibits Toxic Effects of Lachesis muta Snake Venom.

    Science.gov (United States)

    da Silva, Ana Cláudia Rodrigues; Ferreira, Luciana Garcia; Duarte, Maria Eugênia Rabello; Noseda, Miguel Daniel; Sanchez, Eladio Flores; Fuly, André Lopes

    2015-06-01

    In Brazil, snakebites are a public health problem and accidents caused by Lachesis muta have the highest mortality index. Envenomation by L. muta is characterized by systemic (hypotension, bleeding and renal failure) and local effects (necrosis, pain and edema). The treatment to reverse the evolution of all the toxic effects is performed by injection of antivenom. However, such therapy does not effectively neutralize tissue damage or any other local effect, since in most cases victims delay seeking appropriate medical care. In this way, alternative therapies are in demand, and molecules from natural sources have been exhaustively tested. In this paper, we analyzed the inhibitory effect of a sulfated galactan obtained from the red seaweed Palisada flagellifera against some toxic activities of L. muta venom. Incubation of sulfated galactan with venom resulted in inhibition of hemolysis, coagulation, proteolysis, edema and hemorrhage. Neutralization of hemorrhage was also observed when the galactan was administered after or before the venom injection; thus mimicking a real in vivo situation. Moreover, the galactan blocked the edema caused by a phospholipase A2 isolated from the same venom. Therefore, the galactan from P. flagellifera may represent a promising tool to treat envenomation by L. muta as a coadjuvant for the conventional antivenom. PMID:26110897

  5. Partial Characterization of Venom from the Colombian Spider Phoneutria Boliviensis (Aranae:Ctenidae).

    Science.gov (United States)

    Estrada-Gomez, Sebastian; Muñoz, Leidy Johana Vargas; Lanchero, Paula; Latorre, Cesar Segura

    2015-08-01

    We report on the first studies on the characterization of venom from Phoneutria boliviensis (Aranae:Ctenidae) (F. O. Pickard-Cambridge, 1897), done with Colombian species. After the electrostimulation extraction process, the venom showed physicochemical properties corresponding to a colorless and water-soluble liquid with a density of 0.86 mg/mL and 87% aqueous content. P. boliviensis venom and RP-HPLC fractions showed hemolytic activity and hydrolyzed the synthetic substrate 4-nitro-3-octanoyloxy-benzoic acid, indicating the presence of phospholipases A2 enzymes. The electrophoretic profile showed an important protein content with molecular masses below 14 kDa, and differences between male and female protein content were also revealed. The RP-HPLC venom profile exposes differences between males and female content consistent with the electrophoretic profile. Five fractions collected from the RP-HPLC displayed significant larvicidal activity. Mass analysis indicates the presence of peptides ranging from 1047.71 to 3278.07 Da. Two peptides, Ctenitoxin-Pb48 and Ctenitoxin-Pb53, were partially identified using HPLC-nESI-MS/MS, which showed a high homology with other Ctenitoxins (family Tx3) from Phoneutria nigriventer, Phoneutria keyserlingi and Phoneutria reidyi affecting voltage-gated calcium receptors (Cav 1, 2.1, 2.2 and 2.3) and NMDA-glutamate receptors. PMID:26264023

  6. Partial Characterization of Venom from the Colombian Spider Phoneutria Boliviensis (Aranae:Ctenidae

    Directory of Open Access Journals (Sweden)

    Sebastian Estrada-Gomez

    2015-07-01

    Full Text Available We report on the first studies on the characterization of venom from Phoneutria boliviensis (Aranae:Ctenidae (F. O. Pickard-Cambridge, 1897, done with Colombian species. After the electrostimulation extraction process, the venom showed physicochemical properties corresponding to a colorless and water-soluble liquid with a density of 0.86 mg/mL and 87% aqueous content. P. boliviensis venom and RP-HPLC fractions showed hemolytic activity and hydrolyzed the synthetic substrate 4-nitro-3-octanoyloxy-benzoic acid, indicating the presence of phospholipases A2 enzymes. The electrophoretic profile showed an important protein content with molecular masses below 14 kDa, and differences between male and female protein content were also revealed. The RP-HPLC venom profile exposes differences between males and female content consistent with the electrophoretic profile. Five fractions collected from the RP-HPLC displayed significant larvicidal activity. Mass analysis indicates the presence of peptides ranging from 1047.71 to 3278.07 Da. Two peptides, Ctenitoxin-Pb48 and Ctenitoxin-Pb53, were partially identified using HPLC-nESI-MS/MS, which showed a high homology with other Ctenitoxins (family Tx3 from Phoneutria nigriventer, Phoneutria keyserlingi and Phoneutria reidyi affecting voltage-gated calcium receptors (Cav 1, 2.1, 2.2 and 2.3 and NMDA-glutamate receptors.

  7. Sulfated Galactan from Palisada flagellifera Inhibits Toxic Effects of Lachesis muta Snake Venom

    Science.gov (United States)

    da Silva, Ana Cláudia Rodrigues; Ferreira, Luciana Garcia; Duarte, Maria Eugênia Rabello; Noseda, Miguel Daniel; Sanchez, Eladio Flores; Fuly, André Lopes

    2015-01-01

    In Brazil, snakebites are a public health problem and accidents caused by Lachesis muta have the highest mortality index. Envenomation by L. muta is characterized by systemic (hypotension, bleeding and renal failure) and local effects (necrosis, pain and edema). The treatment to reverse the evolution of all the toxic effects is performed by injection of antivenom. However, such therapy does not effectively neutralize tissue damage or any other local effect, since in most cases victims delay seeking appropriate medical care. In this way, alternative therapies are in demand, and molecules from natural sources have been exhaustively tested. In this paper, we analyzed the inhibitory effect of a sulfated galactan obtained from the red seaweed Palisada flagellifera against some toxic activities of L. muta venom. Incubation of sulfated galactan with venom resulted in inhibition of hemolysis, coagulation, proteolysis, edema and hemorrhage. Neutralization of hemorrhage was also observed when the galactan was administered after or before the venom injection; thus mimicking a real in vivo situation. Moreover, the galactan blocked the edema caused by a phospholipase A2 isolated from the same venom. Therefore, the galactan from P. flagellifera may represent a promising tool to treat envenomation by L. muta as a coadjuvant for the conventional antivenom. PMID:26110897

  8. Evaluation of a Novel Rapid Test System for the Detection of Specific IgE to Hymenoptera Venoms

    Directory of Open Access Journals (Sweden)

    Nikolai Pfender

    2012-01-01

    Full Text Available Background. The Allergy Lateral Flow Assay (ALFA is a novel rapid assay for the detection of sIgE to allergens. The objective of this study is the evaluation of ALFA for the detection of sIgE to bee venom (BV and wasp venom (WV in insect venom allergic patients. Methods. Specific IgE to BV and WV was analyzed by ALFA, ALLERG-O-LIQ, and ImmunoCAP in 80 insect venom allergic patients and 60 control sera. Sensitivity and specificity of ALFA and correlation of ALFA and ImmunoCAP results were calculated. Results. The sensitivity/specificity of ALFA to the diagnosis was 100%/83% for BV and 82%/97% for WV. For insect venom allergic patients, the Spearman correlation coefficient for ALFA versus ImmunoCAP was 0.79 for BV and 0.80 for WV. However, significant differences in the negative control groups were observed. Conclusion. ALFA represents a simple, robust, and reliable tool for the rapid detection of sIgE to insect venoms.

  9. Crotalus durissus terrificus venom as a source of antitumoral agents

    Directory of Open Access Journals (Sweden)

    MA Soares

    2010-01-01

    Full Text Available The basic knowledge on neoplasms is increasing quickly; however, few advances have been achieved in clinical therapy against tumors. For this reason, the development of alternative drugs is relevant in the attempt to improve prognosis and to increase patients' survival. Snake venoms are natural sources of bioactive substances with therapeutic potential. The objective of this work was to identify and characterize the antitumoral effect of Crotalus durissus terrificus venom (CV and its polypeptide, crotoxin, on benign and malignant tumors, respectively, pituitary adenoma and glioblastoma. The results demonstrated that CV possess a powerful antitumoral effect on benign (pituitary adenoma and malignant (glioblastoma multiforme tumors with IC50 values of 0.96 ± 0.11 µg/mL and 2.15 ± 0.2 µg/mL, respectively. This antitumoral effect is cell-cycle-specific and dependent on extracellular calcium, an important factor for crotoxin phospholipase A2 activity. The CV antitumoral effect can be ascribed, at least partially, to the polypeptide crotoxin that also induced brain tumor cell death. In spite of the known CV nephrotoxicity and neurotoxicity, acute treatment with its antitumoral dose established in vitro was not found to be toxic to the analyzed animals. These results indicate the biotechnological potential of CV as a source of pharmaceutical templates for cancer therapy.

  10. Deaths from bee stings: a report of three cases from Pretoria, South Africa.

    Science.gov (United States)

    du Toit-Prinsloo, Lorraine; Morris, Neil Kennith; Meyer, Pieter; Saayman, Gert

    2016-03-01

    In South Africa bee stings are most commonly caused by either Apis mellifera capensis or A. mellifera scutellata, indigenous species which are notoriously aggressive when compared to European honey bees. According to Statistics South Africa, 109 deaths were documented for the period 2001-2011 as having been caused by hornets, wasps, and bees (ICD10-X26). This appears to be a small number but, as was reported in Australia, these statistics might be inaccurate due to either over- or underreporting of cases. We report 3 cases of fatalities due to bee stings, including one with postmortem features of diffuse intravascular coagulopathy. A brief overview of the venom of the honey bee, reactions following a bee sting and possible mechanisms of death are presented. Confirming the diagnosis in these cases may be very problematic for the forensic pathologist, as in many cases minimal history is available and both external and internal examination could fail to reveal any specific signs of bee sting or other obvious morphologic abnormalities. Thus, there is a need for reliable confirmatory or supportive diagnostic tests. PMID:26759134

  11. Secreted phospholipases A2, a new class of HIV inhibitors that block virus entry into host cells

    OpenAIRE

    Fenard, David; Lambeau, Gérard; Valentin, Emmanuel; Lefebvre, Jean-Claude; Lazdunski, Michel; Doglio, Alain

    1999-01-01

    Mammalian and venom secreted phospholipases A2 (sPLA2s) have been associated with a variety of biological effects. Here we show that several sPLA2s protect human primary blood leukocytes from the replication of various macrophage and T cell–tropic HIV-1 strains. Inhibition by sPLA2s results neither from a virucidal effect nor from a cytotoxic effect on host cells, but it involves a more specific mechanism. sPLA2s have no effect on virus binding to cells nor on syncytia formation, but they pre...

  12. Proteomic analysis of the rare Uracoan rattlesnake Crotalus vegrandis venom: Evidence of a broad arsenal of toxins.

    Science.gov (United States)

    Viala, Vincent Louis; Hildebrand, Diana; Fucase, Tamara Mieco; Sciani, Juliana Mozer; Prezotto-Neto, José Pedro; Riedner, Maria; Sanches, Leonardo; Nishimura, Paula Juliana; Oguiura, Nancy; Pimenta, Daniel Carvalho; Schlüter, Hartmut; Betzel, Christian; Arni, Raghuvir Krishnaswami; Spencer, Patrick Jack

    2015-12-01

    The investigation of venoms has many clinical, pharmacological, ecological and evolutionary outcomes. The Crotalus spp. venom can cause hemorrhage, neurotoxicity, myotoxicity, coagulopathy and hypotension. Although neurotoxicity and hemorrhage usually does not occur for the same species, the rare Venezuelan species Crotalus vegrandis presents both characteristic. Different from the other species it has a restricted ecological niche and geographical distribution. Nevertheless, it has a raising medical importance as this rattlesnake population is increasing. Few works describe its neurotoxic and hemorrhagic features, but other toxins might play an important role in envenomation. We combined proteomic methods to identify for the first time the main components of it venom: 2D SDS-PAGE and gel-filtration chromatography for protein mixture decomplexation; LC-MS(2) of low molecular mass fractions and tryptic peptides; bioinformatic identification of toxin families and specific protein species based on unique peptide analysis and sequence database enriched with species-specific venom gland transcripts; and finally polyclonal anti-crotamine Western-blotting. Our results point to a broad arsenal of toxins in C. vegrandis venom: PIII and PII metalloproteases, crotoxin subunits, other phospholipases, isoforms of serine proteases and lectins, l-amino-acid oxidase, nerve growth factor, as well as other less abundant toxins. PMID:26403864

  13. Exploring the proteomes of the venoms of the Peruvian pit vipers Bothrops atrox, B. barnetti and B. pictus.

    Science.gov (United States)

    Kohlhoff, Markus; Borges, Marcia H; Yarleque, Armando; Cabezas, Cesar; Richardson, Michael; Sanchez, Eladio F

    2012-04-01

    We report the comparative proteomic characterization of the venoms of Bothrops atrox, B. barnetti and B. pictus. The venoms were subjected to RP-HPLC and the resulting fractions analyzed by SDS-PAGE. The proteins were cut from the gels, digested with trypsin and identified via peptide mass fingerprint and manual sequencing of selected peptides by MALDI-TOF/TOF mass spectrometry. Around 20-25 proteins were identified belonging to only 6-7 protein families. Metalloproteinases of the classes P-I and P-III were the most abundant proteins in all venoms (58-74% based on peak area A214 nm), followed by phospholipases-A(2) (6.4-14%), disintegrins (3.2-9%) and serine proteinases (7-11%), and some of these proteins occurred in several isoforms. In contrast cysteine-rich secretory proteins and L-amino acid oxidases appeared only as single isoforms and were found only in B. atrox and B. barnetti. C-type lectins were also detected in all venoms but at low levels (~ 5%). Furthermore, the venoms contain variable numbers of peptides (Bothrops species is in agreement with their pharmacological and pathological effects. PMID:22300577

  14. One World: Service Bees

    Science.gov (United States)

    Thomason, Rhonda

    2009-01-01

    Bees are a vital part of the ecology. People of conscience are a vital part of society. In Nina Frenkel's "One World" poster, the bee is also a metaphor for the role of the individual in a diverse society. This article presents a lesson that uses Frenkel's poster to help early-grades students connect these ideas and explore both the importance of…

  15. Wild bees and pollination

    OpenAIRE

    Pfiffner, Lukas; Müller, Andreas

    2016-01-01

    The fact sheet summarizes the current state of academic knowledge on the importance of wild bees in the pollination of wild and cultivated plants. It mentions the known causes for the decline of wild bees, describes the effects of organic farming and lists necessary measures for promotion and protection of the pollinators.

  16. Widespread occurrence of honey bee pathogens in solitary bees

    OpenAIRE

    Ravoet, J.; De Smet, L.; Meeus, I; Smagghe, G.; Wenseleers, Tom; de Graaf, D C

    2014-01-01

    Solitary bees and honey bees from a neighbouring apiary were screened for a broad set of putative pathogens including protists, fungi, spiroplasmas and viruses. Most sampled bees appeared to be infected with multiple parasites. Interestingly, viruses exclusively known from honey bees such as Apis mellifera Filamentous Virus and Varroa destructor Macula-like Virus were also discovered in solitary bees. A microsporidium found in Andrena vaga showed most resemblance to Nosema thomsoni. Our resul...

  17. Preclinical testing of Peruvian anti-bothropic anti-venom against Bothrops andianus snake venom.

    Science.gov (United States)

    Schneider, Francisco S; Starling, Maria C; Duarte, Clara G; Machado de Avila, Ricardo; Kalapothakis, Evanguedes; Silva Suarez, Walter; Tintaya, Benigno; Flores Garrido, Karin; Seraylan Ormachea, Silvia; Yarleque, Armando; Bonilla, César; Chávez-Olórtegui, Carlos

    2012-11-01

    Bothrops andianus is a venomous snake found in the area of Machu Picchu (Peru). Its venom is not included in the antigenic pool used for production of the Peruvian anti-bothropic anti-venom. B. andianus venom can elicit many biological effects such as hemorrhage, hemolysis, proteolytic activity and lethality. The Peruvian anti-bothropic anti-venom displays consistent cross-reactivity with B. andianus venom, by ELISA and Western Blotting and is also effective in neutralizing the venom's toxic activities. PMID:22796381

  18. Identification of cDNAs encoding viper venom hyaluronidases: cross-generic sequence conservation of full-length and unusually short variant transcripts.

    Science.gov (United States)

    Harrison, Robert A; Ibison, Frances; Wilbraham, Davina; Wagstaff, Simon C

    2007-05-01

    The immobilisation of prey by snakes is most efficiently achieved by the rapid dissemination of venom from its site of injection into the blood stream. Hyaluronidase is a common component of snake venoms and has been termed the "venom spreading factor". In the absence of nucleotide or protein sequence data to confirm the functional identity of this venom component, we interrogated a venom gland EST database for the saw-scaled viper, Echis ocellatus (Nigeria), using the gene ontology (GO) term "carbohydrate metabolism". A single hyalurononglucosaminadase-activity matching sequence (EOC00242) was found and used to design PCR primers to acquire the full-length cDNA sequence. Although very different from the bee venom and mammalian hyaluronidase sequences, the E. ocellatus sequence retained all the catalytic, positional and structural residues that characterise this class of carbohydrate metabolising hydrolases. An extraordinarily high level of sequence identity (>95%) was observed in analogous venom gland cDNA sequences isolated (by PCR) from another saw-scaled viper species, E. pyramidum leakeyi (Kenya), and from the sahara horned viper, Cerastes cerastes cerastes (Egypt) and the puff adder, Bitis arietans (Nigeria). Smaller amplicons, lacking hyaluronidase catalytic residues because of 768 bp or 855 bp central deletions, appear to encode either truncated peptides without hyaluronidase activity, or are non-translated transcripts because they lack consensus translation initiating motifs. PMID:17210232

  19. Obtained and evaluation of antisera raised against irradiated crotalic whole venom or crotoxin in 60 Co source

    International Nuclear Information System (INIS)

    Snake bite is a great Public Health problem in our country. The accidents with snakes from Crotalus genus are the most severe. About 1% of the victims die without seratherapy. The antivenons are obtained from hyper immune horse plasma. During the production these animals present signs of envenoming that result in a decrease of organic resistance besides the horses maintenance is very expensive and the producers are fewer, so the sera production is restrict. Many techniques which could reduce the venoms toxicity and increase the sera production using chemical and physical agents have been studied. The gamma rays are excellent tool to detoxify venoms and toxins. It is able to modify protein structures that decrease lethally, toxic and enzymatic activities without modifying the immunogenicity. So, it is important evaluate the sera production in rabbits using gamma rays detoxified venom and crotoxin as immunogen and their power as reagents in immuno assays. In order to obtain the antisera, Crotalus durissus terrificus whole venom or isolated crotoxin was irradiated with 2.000 Gy in 60 Co source, in a 150 mM NaCl solution, and inoculated in rabbits. The sera production were screened by immunoprecipitation, immuno enzymatic (ELISA) and immunoradiometric (IRMA) assays. The specificity was studied by immuno-electrophoresis, ELISA and western blot techniques. The neutralizing power was evaluated by neutralization of phospholipase A2 activity of toxin in vitro. The antisera were used as reagents in antigen capture assays ELISA and IRMA immuno assays to detect circulant antigens in sera of mice experimentally inoculated with crotalic venom or crotoxin. The results showed that both detoxified venom or crotoxin were good immunogens, and they were able to induce antibodies that could recognize non-irradiated venom or isolated crotoxin. The data suggest that those antibodies present more specificity and higher in vitro neutralizing power, when compared with commercial

  20. A transcriptomic analysis of gene expression in the venom gland of the snake Bothrops alternatus (urutu

    Directory of Open Access Journals (Sweden)

    Menossi Marcelo

    2010-10-01

    Full Text Available Abstract Background The genus Bothrops is widespread throughout Central and South America and is the principal cause of snakebite in these regions. Transcriptomic and proteomic studies have examined the venom composition of several species in this genus, but many others remain to be studied. In this work, we used a transcriptomic approach to examine the venom gland genes of Bothrops alternatus, a clinically important species found in southeastern and southern Brazil, Uruguay, northern Argentina and eastern Paraguay. Results A cDNA library of 5,350 expressed sequence tags (ESTs was produced and assembled into 838 contigs and 4512 singletons. BLAST searches of relevant databases showed 30% hits and 70% no-hits, with toxin-related transcripts accounting for 23% and 78% of the total transcripts and hits, respectively. Gene ontology analysis identified non-toxin genes related to general metabolism, transcription and translation, processing and sorting, (polypeptide degradation, structural functions and cell regulation. The major groups of toxin transcripts identified were metalloproteinases (81%, bradykinin-potentiating peptides/C-type natriuretic peptides (8.8%, phospholipases A2 (5.6%, serine proteinases (1.9% and C-type lectins (1.5%. Metalloproteinases were almost exclusively type PIII proteins, with few type PII and no type PI proteins. Phospholipases A2 were essentially acidic; no basic PLA2 were detected. Minor toxin transcripts were related to L-amino acid oxidase, cysteine-rich secretory proteins, dipeptidylpeptidase IV, hyaluronidase, three-finger toxins and ohanin. Two non-toxic proteins, thioredoxin and double-specificity phosphatase Dusp6, showed high sequence identity to similar proteins from other snakes. In addition to the above features, single-nucleotide polymorphisms, microsatellites, transposable elements and inverted repeats that could contribute to toxin diversity were observed. Conclusions Bothrops alternatus venom gland

  1. Extraction of Venom and Venom Gland Microdissections from Spiders for Proteomic and Transcriptomic Analyses

    OpenAIRE

    Garb, Jessica E.

    2014-01-01

    Venoms are chemically complex secretions typically comprising numerous proteins and peptides with varied physiological activities. Functional characterization of venom proteins has important biomedical applications, including the identification of drug leads or probes for cellular receptors. Spiders are the most species rich clade of venomous organisms, but the venoms of only a few species are well-understood, in part due to the difficulty associated with collecting minute quantities of venom...

  2. Is Hybridization a Source of Adaptive Venom Variation in Rattlesnakes? A Test, Using a Crotalus scutulatus × viridis Hybrid Zone in Southwestern New Mexico

    Science.gov (United States)

    Zancolli, Giulia; Baker, Timothy G.; Barlow, Axel; Bradley, Rebecca K.; Calvete, Juan J.; Carter, Kimberley C.; de Jager, Kaylah; Owens, John Benjamin; Price, Jenny Forrester; Sanz, Libia; Scholes-Higham, Amy; Shier, Liam; Wood, Liam; Wüster, Catharine E.; Wüster, Wolfgang

    2016-01-01

    Venomous snakes often display extensive variation in venom composition both between and within species. However, the mechanisms underlying the distribution of different toxins and venom types among populations and taxa remain insufficiently known. Rattlesnakes (Crotalus, Sistrurus) display extreme inter- and intraspecific variation in venom composition, centered particularly on the presence or absence of presynaptically neurotoxic phospholipases A2 such as Mojave toxin (MTX). Interspecific hybridization has been invoked as a mechanism to explain the distribution of these toxins across rattlesnakes, with the implicit assumption that they are adaptively advantageous. Here, we test the potential of adaptive hybridization as a mechanism for venom evolution by assessing the distribution of genes encoding the acidic and basic subunits of Mojave toxin across a hybrid zone between MTX-positive Crotalus scutulatus and MTX-negative C. viridis in southwestern New Mexico, USA. Analyses of morphology, mitochondrial and single copy-nuclear genes document extensive admixture within a narrow hybrid zone. The genes encoding the two MTX subunits are strictly linked, and found in most hybrids and backcrossed individuals, but not in C. viridis away from the hybrid zone. Presence of the genes is invariably associated with presence of the corresponding toxin in the venom. We conclude that introgression of highly lethal neurotoxins through hybridization is not necessarily favored by natural selection in rattlesnakes, and that even extensive hybridization may not lead to introgression of these genes into another species. PMID:27322321

  3. Conus venom peptide pharmacology.

    Science.gov (United States)

    Lewis, Richard J; Dutertre, Sébastien; Vetter, Irina; Christie, MacDonald J

    2012-04-01

    Conopeptides are a diverse group of recently evolved venom peptides used for prey capture and/or defense. Each species of cone snails produces in excess of 1000 conopeptides, with those pharmacologically characterized (≈ 0.1%) targeting a diverse range of membrane proteins typically with high potency and specificity. The majority of conopeptides inhibit voltage- or ligand-gated ion channels, providing valuable research tools for the dissection of the role played by specific ion channels in excitable cells. It is noteworthy that many of these targets are found to be expressed in pain pathways, with several conopeptides having entered the clinic as potential treatments for pain [e.g., pyroglutamate1-MrIA (Xen2174)] and one now marketed for intrathecal treatment of severe pain [ziconotide (Prialt)]. This review discusses the diversity, pharmacology, structure-activity relationships, and therapeutic potential of cone snail venom peptide families acting at voltage-gated ion channels (ω-, μ-, μO-, δ-, ι-, and κ-conotoxins), ligand-gated ion channels (α-conotoxins, σ-conotoxin, ikot-ikot, and conantokins), G-protein-coupled receptors (ρ-conopeptides, conopressins, and contulakins), and neurotransmitter transporters (χ-conopeptides), with expanded discussion on the clinical potential of sodium and calcium channel inhibitors and α-conotoxins. Expanding the discovery of new bioactives using proteomic/transcriptomic approaches combined with high-throughput platforms and better defining conopeptide structure-activity relationships using relevant membrane protein crystal structures are expected to grow the already significant impact conopeptides have had as both research probes and leads to new therapies. PMID:22407615

  4. Novel venom gene discovery in the platypus

    OpenAIRE

    Mitreva, Makedonka; Papenfuss, Antony T.; Whittington, Camilla M; Locke, Devin P.; Mardis, Elaine; Wilson, Richard K.; Abubucker, Sahar; Wong, Emily Sw; Hsu, Artur; Kuchei, Philip W.; Belov, Katherine; Warren, Wesley

    2010-01-01

    Background: To date, few peptides in the complex mixture of platypus venom have been identified and sequenced, in part due to the limited amounts of platypus venom available to study. We have constructed and sequenced a cDNA library from an active platypus venom gland to identify the remaining components. Results: We identified 83 novel putative platypus venom genes from 13 toxin families, which are homologous to known toxins from a wide range of vertebrates (fish, reptiles, insectivores)...

  5. NAD nucleosidase of Agkistrodon bilineatus venom.

    Science.gov (United States)

    Brunson, E M; Johnson, B D; Sifford, D H

    1978-03-01

    NAD nucleosidase (NAD glycohydrolase, EC 3.2.2.5) activity in Agkistrodon bilineatus venom was observed. Using the cyanide assay method at pH 7.9, lyophilized crude venom had an activity of 0.19 units/mg. Chromatography of the crude venom on DEAE Sephadex A-50 with ammonium acetate buffer by two stage elution yielded 13 fractions. Peak NAD nucleosidase activity occurred at Fraction X. Crude venom and Fraction X NAD nucleosidase activities were thermolabile. PMID:206161

  6. Spider-Venom Peptides as Therapeutics

    OpenAIRE

    Glenn F King; Volker Herzig; Rash, Lachlan D; Jensen, Jonas E.; Sing Yan Er; Sebastian Senff; Saez, Natalie J.

    2010-01-01

    Spiders are the most successful venomous animals and the most abundant terrestrial predators. Their remarkable success is due in large part to their ingenious exploitation of silk and the evolution of pharmacologically complex venoms that ensure rapid subjugation of prey. Most spider venoms are dominated by disulfide-rich peptides that typically have high affinity and specificity for particular subtypes of ion channels and receptors. Spider venoms are conservatively predicted to contain more ...

  7. 意大利蜜蜂蜂毒磷脂酶A2基因在大肠杆菌中的表达%Expression of a bee-venom phospholipase A2 gene from Apis mellifera in Escherichia coli

    Institute of Scientific and Technical Information of China (English)

    沈立荣; 程家安; 张传溪; 吴建祥

    2004-01-01

    将意大利蜜蜂蜂毒磷脂酶A2(AmPLA2)成熟肽编码区基因(405 bp) 插入表达载体pETBlue-1,在大肠杆菌Tuner(DE3)placⅠ中诱导表达,经SDS-PAGE电泳检测,表达产物分子量为15 kD,约占细菌总蛋白的4.3%;用兔抗AmPLA2多克隆血清为第一抗体作Western blot检测,表达产物显示与天然AmPLA2同样的特异性印迹,证实AmPLA2 基因已在大肠杆菌中得到表达.

  8. Tityus serrulatus venom peptidomics: assessing venom peptide diversity.

    Science.gov (United States)

    Rates, Breno; Ferraz, Karla K F; Borges, Márcia H; Richardson, Michael; De Lima, Maria Elena; Pimenta, Adriano M C

    2008-10-01

    MALDI-TOF-TOF and de novo sequencing were employed to assess the Tityus serrulatus venom peptide diversity. Previous works has shown the cornucopia of molecular masses, ranging from 800 to 3000Da, present in the venom from this and other scorpions species. This work reports the identification/sequencing of several of these peptides. The majority of the peptides found were fragments of larger venom toxins. For instance, 28 peptides could be identified as fragments from Pape proteins, 10 peptides corresponded to N-terminal fragments of the TsK beta (scorpine-like) toxin and fragments of potassium channel toxins (other than the k-beta) were sequenced as well. N-terminal fragments from the T. serrulatus hypotensins-I and II and a novel hypotensin-like peptide could also be found. This work also reports the sequencing of novel peptides without sequence similarities to other known molecules. PMID:18718845

  9. ANTITUMOR EFFECT OF SNAKE VENOMS

    Directory of Open Access Journals (Sweden)

    R. J. DA SILVA

    1996-01-01

    Full Text Available The search for biological antitumor agents has been pursued for over half a century. Snake venom has been shown to possess a wide spectrum of biological activities. The objectives of the present review are to evaluate the existing controversies on this subject published in a number of papers and to propose probable explanations for the phenomena observed. We reported our results obtained in a study, in which we evaluated the action of the venoms of Crotalus durissus terrificus and Bothrops jararaca on Ehrlich ascites tumor cells. We noticed an important antitumor effect, mainly with Bothrops jararaca venom, as well as an increase in the functional activity of macrophages. We also observed an increase in the number of mononuclear and polymorphonuclear cells with Bothrops jararaca venom. Considering these findings, we postulate that both Bothrops jararaca and Crotalus durissus terrificus venoms can act directly on tumor cells. In addition, we propose an indirect mechanism, based on the stimulation of the inflammatory response, to inhibit tumor growth and to promote its rejection.

  10. Diagnostic uses of snake venom.

    Science.gov (United States)

    Marsh, N A

    2001-01-01

    Snake venom toxins are invaluable for the assay of coagulation factors and for the study of haemostasis generally. Thrombin-like enzymes (SVTLE) are used for fibrinogen and fibrinogen breakdown product assays as well as detecting dysfibrinogenaemias. Since SVTLE are not inhibited by heparin, they can be used for assaying antithrombin III in samples containing heparin. Snake venom prothrombin activators are utilised in prothrombin assays, whilst Russell's viper venom (RVV) can be used to assay clotting factors V, VII, X and lupus anticoagulants (LA). Activators from the taipan, Australian brown snake and saw-scaled viper have also been used to assay LA. Protein C (PC) and activated PC (APC) resistance can be measured by means of RVV, Protac (from Southern copperhead snake venom) and STA-Staclot (from Crotalus viridis helleri) whilst von Willebrand factor can be studied with Botrocetin (Bothrops jararaca). Finally, snake venom C-type lectins and metalloproteinase disintegrins are being used to study platelet glycoprotein receptors and show great potential for use in the routine coagulation laboratory. PMID:11910187

  11. MiniAp-4: A Venom-Inspired Peptidomimetic for Brain Delivery.

    Science.gov (United States)

    Oller-Salvia, Benjamí; Sánchez-Navarro, Macarena; Ciudad, Sonia; Guiu, Marc; Arranz-Gibert, Pol; Garcia, Cristina; Gomis, Roger R; Cecchelli, Roméo; García, Jesús; Giralt, Ernest; Teixidó, Meritxell

    2016-01-11

    Drug delivery across the blood-brain barrier (BBB) is a formidable challenge for therapies targeting the central nervous system. Although BBB shuttle peptides enhance transport into the brain non-invasively, their application is partly limited by lability to proteases. The present study proposes the use of cyclic peptides derived from venoms as an affordable way to circumvent this drawback. Apamin, a neurotoxin from bee venom, was minimized by reducing its complexity, toxicity, and immunogenicity, while preserving brain targeting, active transport, and protease resistance. Among the analogues designed, the monocyclic lactam-bridged peptidomimetic MiniAp-4 was the most permeable. This molecule is capable of translocating proteins and nanoparticles in a human-cell-based BBB model. Furthermore, MiniAp-4 can efficiently deliver a cargo across the BBB into the brain parenchyma of mice. PMID:26492861

  12. Wild bees and agroecosystems

    OpenAIRE

    Morandin, Lora

    2005-01-01

    Research in agriculture often focuses on development of new technologies rather than on potential environmental impacts. Pollinators, primarily bees, are essential to agriculture, providing significant yield benefit in over 66% of crop species. Currently, dramatic losses of managed honey bee pollinators in North America along with suspected world-wide losses of wild pollinators are focusing research attention on an impending but still poorly documented pollination crisis. Essential questions ...

  13. Studies on pharmacological effects of Russell's viper and Saw-scaled viper venom and its neutralization by chicken egg yolk antibodies.

    Science.gov (United States)

    Meenatchisundaram, S; Parameswari, G; Michael, A; Ramalingam, S

    2008-08-01

    Antivenom antibodies were raised in 24-week-old white leghorn chickens against hemotoxic venoms of Russell's viper and Saw-scaled viper snakes. Booster injections of increasing concentrations of venom were given at 14days of time interval to raise the antivenom level in egg yolk. Antibodies were extracted from immunized chicken egg yolk by Polson et al. (Polson A., Von Wechmar M.B., Van Regenmortel M.H.V. Isolation of viral IgY antibodies from yolks of immunized hens. Immunological Communications 1980; 9:475-493.) and further purified by DEAE cellulose ion exchange column chromatography, which gave pure (180-200kDa) specific antibodies against venom. High titre of more than 1:10,000 antibodies were detected by ELISA at the 135th day of observation. The lethal toxicity and various pharmacological activities like hemorrhagic activity, phospholipase activity, edema and procoagulant activities of venom were carried out by both in vivo and in vitro methods. The effectiveness of antivenom in neutralizing these effects was carried out involving pre-incubation type experiments. The median effective dose (ED50) for Russell's viper venom was 0.96mg/2LD50/18g mice and for Saw-scaled viper venom it was 1.28mg/2LD50/18g mice. One millilitre of specific antivenom was effective in neutralizing 0.110mg of Russell's viper and 0.137mg of Saw-scaled viper venoms respectively (PD50). Antivenom was effective in neutralization assays in a dose dependent manner. The results indicate that antibodies raised in chicken could effectively neutralize the pharmacological effects induced by venoms and chickens therefore present an alternative and cheaper source of specific antibody generation. PMID:18550009

  14. Ammodytoxin, a neurotoxic secreted phospholipase A2, can act in the cytosol of the nerve cell

    International Nuclear Information System (INIS)

    Recent identification of intracellular proteins that bind ammodytoxin (calmodulin, 14-3-3 proteins, and R25) suggests that this snake venom presynaptically active phospholipase A2 acts intracellularly. As these ammodytoxin acceptors are cytosolic and mitochondrial proteins, the toxin should be able to enter the cytosol of a target cell and remain stable there to interact with them. Using laser scanning confocal microscopy we show here that Alexa-labelled ammodytoxin entered the cytoplasm of the rat hippocampal neuron and subsequently also its nucleus. The transport of proteins into the nucleus proceeds via the cytosol of a cell, therefore, ammodytoxin passed the cytosol of the neuron on its way to the nucleus. Although it is not yet clear how ammodytoxin is translocated into the cytosol of the neuron, our results demonstrate that its stability in the cytosol is not in question, providing the evidence that the toxin can act in this cellular compartment

  15. Biophysical mechanisms of phospholipase A2 activation and their use in liposome-based drug delivery

    DEFF Research Database (Denmark)

    Jørgensen, Kaj; Davidsen, Jesper; Mouritsen, Ole G.

    2002-01-01

    Secretory phospholipase A(2) (PLA(2)) is a ubiquitous water-soluble enzyme found in venom, pancreatic, and cancerous fluid. It is also known to play a role in membrane remodeling processes as well as in cellular signaling cascades. PLA(2) is interfacially active and functions mainly on organized ...... mechanisms has been used to propose a novel principle for liposomal drug targeting, release, and absorption triggered by secretory PLA(2).(C) 2002 Federation of European Biochemical Societies. Published by Elsevier Science B.V. All rights reserved....... reviewed. Results obtained from a variety of experimental and theoretical studies of PLA(2) activity on lipid-bilayer substrates are then presented which provide insight into the biophysical mechanisms of PLA(2) activation on lipid bilayers and liposomes of different composition. The insight into these...

  16. Carbodiimide modification enhances activity of pig pancreatic phospholipase A2

    OpenAIRE

    Ferreira, João Paulo M.; Sasisekharan, Ram; Louie, Otway; Langer, Robert

    1994-01-01

    Pig phospholipase A2, pig iso-phospholipase A2 and bovine pancreatic phospholipase A2 were reacted in solution with 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide, in the presence of N-hydroxysulfosuccinimide, at pH 7. The influence of micellar protectants was analyzed. In the presence of n-hexadecylphosphocholine, the losses of activity in micellar diheptanoyl-lecithin were 80, 35, and 10% in bovine phospholipase A2, pig iso-phospholipase A2, and pig phospholipase A2, respectively. With 1-ole...

  17. Action of pure phospholipase A2 and phospholipase C on human erythrocytes and ghosts

    NARCIS (Netherlands)

    Roelofsen, B.; Zwaal, R.F.A.; Comfurius, P.; Woodward, C.B.; Deenen, L.L.M. van

    1971-01-01

    1. 1.|Pancreatic phospholipase A2 (phosphatide acyl-hydrolase, EC 3.1.1.4) and phospholipase C (phosphatidylcholine cholinephosphohydrolase, EC 3.1.4.3) from Bacillus cereus appeared not to be lytic for human erythrocytes, either before or after treatment of the cells with trypsin, pronase or neuram

  18. Magnetic effect on dancing bees

    Science.gov (United States)

    Lindauer, M.; Martin, H.

    1972-01-01

    Bee sensitivity to the earth's magnetic field is studied. Data cover sensitivity range and the use of magnetoreception for orientation purposes. Experimental results indicate bee orientation is aided by gravity fields when the magnetic field is compensated.

  19. Pharmacological characterization of rat paw edema induced by Cerastes gasperettii (cerastes venom

    Directory of Open Access Journals (Sweden)

    A. K. Al-Asmari

    2006-01-01

    Full Text Available Inflammatory response induced by the venom of the Arabian sand viper Cerastes gasperettii was studied by measuring rat hind-paw edema. Cerastes gasperettii venom (CgV, 3.75-240 µg/paw, heated for 30s at 97°C, caused a marked dose and time-dependent edema in rat paw. Response was maximal 2h after venom administration and ceased within 24h. Heated CgV was routinely used in our experiments at the dose of 120 µg/paw. Among all the drugs and antivenoms tested, cyproheptadine and 5-nitroindazole were the most effective in inhibiting edema formation. Aprotinin, mepyramine, dexamethasone, diclofenac, dipyridamole, Nomega-nitro-L-arginine, quinacrine, and nordihydroguaiaretic acid showed statistically (p<0.001 significant inhibitory effect, but with variations in their inhibition degree. Equine polyspecific and rabbit monospecific antivenoms significantly (p<0.001 reduced edema when locally administered (subplantar but were ineffective when intravenously injected. We can conclude that the principal inflammatory mediators were serotonin, histamine, adenosine transport factors, phosphodiesterase (PDE, cyclooxygenase, lipoxygenase and phospholipase A2 (PLA2, in addition to other prostaglandins and cytokines.

  20. Purification and characterization of a hemorrhagic metalloproteinase from Bothrops lanceolatus (Fer-de-lance) snake venom.

    Science.gov (United States)

    Stroka, Alessandra; Donato, José L; Bon, Cassian; Hyslop, Stephen; de Araújo, Albetiza Lôbo

    2005-03-15

    Bothrops snake venoms contain metalloproteinases that contribute to the local effects seen after envenoming. In this work, a hemorrhagic metalloproteinase (BlaH1) was purified from the venom of the snake Bothrops lanceolatus by a combination of gel filtration, affinity (metal chelating) and hydrophobic interaction chromatographies. The hemorrhagin was homogeneous by SDS-PAGE and had a molecular mass of 28 kDa that was unaltered by treatment with beta-mercaptoethanol. BlaH1 gave a single band in immunoelectrophoresis and immunoblotting using commercial bothropic antivenom. BlaH1 had hemorrhagic, caseinolytic, fibrinogenolytic, collagenolytic and elastinolytic activities, but no phospholipase A(2) activity. The hemorrhagic and caseinolytic activities were inhibited by EDTA, indicating that they were metal ion-dependent. In contrast, aprotinin, benzamidine and PMSF did not affect these activities. The caseinolytic activity of BlaH1 had a pH optimum of 8.0 and was stable in solution at up to 40 degrees C; activity was completely lost at > or =70 degrees C. The hemorrhagic activity was neutralized by commercial bothropic antivenom. These properties suggest that this new hemorrhagin belongs to class P-I snake venom metalloproteinases. PMID:15733562