2 resultados para CATHODIC CLEAVAGE
em Universidad del Rosario, Colombia
Resumo:
Experimental and epidemiological studies demonstrate that fetal growth restriction and low birth weight enhance the risk of chronic diseases in adulthood. Derangements in tissue-specific epigenetic programming of fetal and placental tissues are a suggested mechanism of which DNA methylation is best understood. DNA methylation profiles in human tissue are mostly performed in DNA from white blood cells. The objective of this study was to assess DNA methylation profiles of IGF2 DMR and H19 in DNA derived from four tissues of the newborn. We obtained from 6 newborns DNA from fetal placental tissue (n = 5), umbilical cord CD34+ hematopoietic stem cells (HSC) and CD34- mononuclear cells (MNC) (n = 6), and umbilical cord Wharton jelly (n = 5). HCS were isolated using magnetic-activated cell separation. DNA methylation of the imprinted fetal growth genes IGF2 DMR and H19 was measured in all tissues using quantitative mass spectrometry. ANOVA testing showed tissue-specific differences in DNA methylation of IGF2 DMR (p value 0.002) and H19 (p value 0.001) mainly due to a higher methylation of IGF2 DMR in Wharton jelly (mean 0.65, sd 0.14) and a lower methylation of H19 in placental tissue (mean 0.25, sd 0.02) compared to other tissues. This study demonstrates the feasibility of the assessment of differential tissue specific DNA methylation. Although the results have to be confirmed in larger sample sizes, our approach gives opportunities to investigate epigenetic profiles as underlying mechanism of associations between pregnancy exposures and outcome, and disease risks in later life.
Resumo:
El propósito de esta investigación es analizar los cambios que trajo consigo la llegada del Partido de la Justicia y Desarrollo al poder (AKP), en Turquía. Este partido se presentó como conservador moderado y democrático y esto le permitió llegar al poder y mantenerlo desde 2001 hasta la actualidad, pues recibió el apoyo de diversos grupos políticos. La noción general que dio el AKP a la opinión pública era que un partido conservador estaba iniciando un proceso democrático real en Turquía. Sin embargo, el líder del AKP y sus seguidores viraron, desde el 2007, hacia el islamismo. Usando la teoría del clivaje social, propuesta Stein Rokkan y Seymour Lipset, se intenta demostrar que los cambios realizados por el AKP fueron una estrategia para blindarse en el poder, pero el sistema de partidos mantuvo la lógica de los clivajes tradicionales y el clivaje islamismo-kemalismo se consolidó como el principal.