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Análisis integrador de epigenomas resueltos por haplotipo a través de tejidos humanos
Danny Leung1, Inkyung Jung1, Nisha Rajagopal1
1Ludwig Institute for Cancer Research, La Jolla, CA 92093, USA.
Nature
|February 20, 2015
Resumen
La investigación del genoma humano revela extensos sesgos alélicos en la cromatina y la transcripción a través de los tejidos. Estas diferencias, influenciadas por los cromosomas homólogos, afectan la regulación genética y los patrones de herencia, ofreciendo nuevos conocimientos sobre los mecanismos de control genético.
Área de la Ciencia:
- La genómica es la genómica.
- La epigenética es la epigenética.
- Genética Humana Genética Humana.
Sus antecedentes:
- Las diferencias alélicas entre cromosomas homólogos pueden influir en la herencia.
- El alcance total de estas diferencias genómicas en los seres humanos sigue siendo en gran medida inexplorado.
- Comprender la variación alélica es crucial para descifrar la regulación génica.
Objetivo del estudio:
- Para delinear las modificaciones de cromatina alélica y transcriptomas a través de diversos tejidos humanos.
- Investigar las relaciones cis-reguladoras entre los genes y sus secuencias de control.
- Para caracterizar las actividades específicas de los tejidos de los elementos repetitivos y los elementos cis-reguladores.
Principales métodos:
- Desarrolló una estrategia de reconstrucción de haplotipos de cromosomas.
- Generó una gran colección de mapas epigenómicos resueltos por haplotipo.
- Analizó mapas de modificación de histonas y datos transcriptómicos.
Principales resultados:
- Reveló extensos sesgos alélicos en el estado de la cromatina y la transcripción a través de los tejidos humanos.
- Se demostró una variación considerable en estos sesgos entre los tejidos y los individuos.
- Se identificaron nuevas características de los elementos cis-reguladores y sus actividades restringidas al tejido.
Conclusiones:
- Los mapas epigenómicos resueltos por haplotipo proporcionan una visión profunda de la regulación génica alélica.
- Los sesgos alélicos impactan significativamente los programas de expresión génica y la herencia.
- Este estudio mejora la comprensión de los mecanismos de los elementos cis-reguladores en el genoma humano.
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