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ARN no codificantes y silenciamiento de genes.

Mikel Zaratiegui1, Danielle V Irvine, Robert A Martienssen

  • 1Cold Spring Harbor Laboratory, 1 Bungtown Road, Cold Spring Harbor, NY 11724, USA.

Cell
|February 27, 2007
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Resumen
Este resumen es generado por máquina.

Los ARN no codificantes regulan la expresión génica a través de interacciones específicas de la secuencia. Esta revisión explora su papel en el silenciamiento de procesos como la formación de heterocromatina y el control de elementos transponibles.

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Área de la Ciencia:

  • Biología Molecular Biología Molecular
  • Genética La genética.
  • La epigenética es la epigenética.

Sus antecedentes:

  • Los ARN no codificantes son cada vez más reconocidos por sus funciones reguladoras en la expresión génica.
  • Los mecanismos de silenciamiento de genes son cruciales para los procesos celulares y el desarrollo.

Objetivo del estudio:

  • Revisar las diversas funciones del ARN no codificante en varias vías de silenciamiento de genes.
  • Discutir los mecanismos subyacentes a la regulación génica mediada por ARN no codificante.
  • Para resaltar los paralelos entre los diferentes fenómenos de silenciamiento.

Principales métodos:

  • Revisión de la literatura de las funciones de ARN no codificantes en el silenciamiento de genes.
  • Análisis de los mecanismos que incluyen la interferencia del ARN y el procesamiento cotranscripcional.
  • Estudio comparativo del silenciamiento en diferentes contextos biológicos.

Principales resultados:

  • Los ARN no codificantes están involucrados en el silenciamiento de la heterocromatina, los elementos transponibles y el ADN extirpado durante el desarrollo.
  • La interferencia del ARN y otros mecanismos median el procesamiento cotranscripcional.
  • Existen similitudes entre el silenciamiento del ARN no codificante y procesos como la impresión y la inactivación de X.

Conclusiones:

  • Los ARN no codificantes juegan un papel crítico en el establecimiento y mantenimiento de estados silenciados de la cromatina.
  • El silenciamiento de genes por ARN no codificantes implica interacciones a nivel de ARN, potencialmente con secuencias reguladoras.
  • La comprensión de las funciones de ARN no codificantes proporciona información sobre la regulación epigenética y la estabilidad del genoma.