Sample records for CROMOSOMA HUMANO 12 (human chromosome 12)

Sample records 1 - 10 shown.


Ética científica de la clonación humana/ Scientific ethics of human cloning

Valenzuela, Carlos Y

Resumen en inglés True cloning is fission, budding or other types of asexual reproduction. In humans it occurs in monozygote twinning. This type of cloning is ethically and religiously good. Human cloning can be performed by twinning (TWClo) or nuclear transfer (NTClo). Both methods need a zygote or a nuclear transferred cell, obtained in vitro (IVTec). They are under the IVTec ethics. IVTecs use humans (zygotes, embryos) as drugs or things; increase the risk of malformations; increase dev (mas) elopment and size of abnormalities and may cause long-term changes. Cloning for preserving extinct (or almost extinct) animals or humans when sexual reproduction is not possible is ethically valid. The previous selection of a phenotype in human cloning violates some ethical principles. NTClo for reproductive or therapeutic purposes is dangerous since it increases the risk for nucleotide or chromosome mutations, de-programming or re-programming errors, aging or malignancy of the embryo cells thus obtained (Rev Méd Chile 2005; 133: 105-12)

Scientific Electronic Library Online (Spanish)


Transcription Initiation Activity Sets Replication Origin Efficiency in Mammalian Cells

Sequeira-Mendes, Joana; Díaz-Uriarte, Ramón; Apedaile, Anwyn; Huntley, Derek; Brockdorff, Neil; Gómez, María

Digital.CSIC (Spain)


The zebrafish genome encodes the largest vertebrate repertoire of functional aquaporins with dual paralogy and substrate specificities similar to mammals

Tingaud-Sequeira, Angèle; Calusinska, Magdalena; Finn, Roderick N.; Chauvigné, François; Lozano, Juan José; Cerdà, Joan

Digital.CSIC (Spain)


Primate-specific spliced PMCHL RNAs are non-protein coding in human and macaque tissues

Schmieder, Sandra; Darré-Toulemonde, Fleur; Arguel, Marie-Jeanne; Delerue-Audegond, Audrey; Christen, Richard; Nahon, Jean-Louis

Digital.CSIC (Spain)


Is mammalian chromosomal evolution driven by regions of genome fragility?

Ruiz-Herrera, Aurora; Castresana, José; Robinson, Terence J

Digital.CSIC (Spain)


Influencia de factores genéticos sobre la orientación sexual humana: Una revisión/ Influence of genetic factors on human sexual orientation: Review

Rodríguez-Larralde, Alvaro; Paradisi, Irene

Resumen en español La orientación sexual humana es un carácter complejo influido por varios genes, experiencias vivenciales y factores socioculturales. Estos factores interactúan y producen un patrón característico de orientación sexual hacia el sexo opuesto, pero existen excepciones, como la bisexualidad y la homosexualidad. Esta parece ser más frecuente en hombres que en mujeres. Es un carácter multifactorial. El método tradicional para el estudio genético de características de (mas) l comportamiento consideradas multifactoriales es analizar si presentan agregación familiar. Para separar la importancia de los factores genéticos de los ambientales en esta agregación, se compara la concordancia para el carácter entre gemelos monocigóticos, dicigóticos y hermanos adoptados criados juntos. Estos estudios revelan que la agregación familiar es más evidente para la homosexualidad masculina que para la femenina. Utilizando el método del umbral para caracteres multifactoriales, y variando la frecuencia de homosexualidad en la población entre 4 y 10%, se han estimado valores de heredabilidad de la misma que oscilan entre 0,27 y 0,76. En 1993, utilizando métodos moleculares, se encontró ligamiento entre homosexualidad y la región cromosómica Xq28; sin embargo, estudios posteriores no lo confirman. Recientemente, la búsqueda amplia en el genoma mostró valores sugerentes o significativos de ligamiento en las regiones 7q36, 8p12 y 10q26, con genes candidatos de interés. La desviación en la proporción de inactivación del cromosoma X en las madres de homosexuales parece apoyar la presencia de genes relacionados con la orientación sexual en este cromosoma. Aún falta mucho por conocerse en relación a la genética de la homosexualidad humana. Resumen en inglés Human sexual orientation is a complex trait, influenced by several genes, experiential and sociocultural factors. These elements interact and produce a typical pattern of sexual orientation towards the opposite sex. Some exceptions exist, like bisexuality and homosexuality, which seem to be more frequent in males than females. Traditional methods for the genetic study of behavior multifactorial characteristics consist in detecting the presence of familial aggregation. In (mas) order to identify the importance of genetic and environmental factors in this aggregation, the concordance of the trait for monozygotic and dizygotic twins and for adopted sibs, reared together and apart, is compared. These types of studies have shown that familial aggregation is stronger for male than for female homosexuality. Based on the threshold method for multifactorial traits, and varying the frequency of homosexuality in the population between 4 and 10%, heritability estimates between 0.27 and 0.76 have been obtained. In 1993, linkage between homosexuality and chromosomal region Xq28 based on molecular approaches was reported. Nevertheless, this was not confirmed in later studies. Recently, a wide search of the genome has given significant or close to significant linkage values with regions 7q36, 8p12 and 10q26, which need to be studied more closely. Deviation in the proportion of X chromosome inactivation in mothers of homosexuals seems to favor the presence of genes related with sexual orientation in this chromosome. There is still much to be known about the genetics of human homosexuality.

Scientific Electronic Library Online (Spanish)


Genetic and Epigenetic Silencing of MicroRNA-203 Enhances ABL1 and BCR-ABL1 Oncogene Expression

Bueno, María J.; Pérez de Castro, Ignacio; Gómez de Cedrón, Marta; Santos, Javier; Calin, George A.; Cigudosa, Juan C.; Croce, Carlo M.; Fernández-Piqueras, José; Malumbres, Marcos

Digital.CSIC (Spain)


FUS-DDIT3 prevents the development of adipocytic precursors in liposarcoma by repressing PPARgamma and C/EBPalpha and activating eIF4E.

Pérez-Mancera, P. A.; Bermejo-Rodríguez, C.; Sánchez-Martín, M.; Abollo-Jiménez, F.; Pintado, B.; Sánchez-García, I.

Digital.CSIC (Spain)


Evolutionary structural and functional conservation of an ortholog of the GLUT2 glucose transporter gene (SLC2A2) in zebrafish

Castillo, Juan; Crespo, Diego; Capilla, Encarnación; Díaz, Mònica; Chauvigné, François; Cerdà, Joan; Planas, Josep V.

Digital.CSIC (Spain)


A burst of segmental duplications in the genome of the African great ape ancestor

Marqués-Bonet, Tomàs; Kidd, Jeffrey M.; Ventura, Mario; Graves, Tina A.; Cheng, Ze; Hillier, LaDeana W.; Jiang, Zhaoshi; Baker, Carl; Malfavon-Borja, Ray; Fulton, Lucinda A.; Alkan, Can; Aksay, Gozde; Girirajan, Santhosh; Siswara, Priscillia; Chen, Lin; Cardone, Maria Francesca; Navarro, Arcadi; Mardis, Elaine R.; Wilson, Richard K.; Eichler, Evan E.

Digital.CSIC (Spain)