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Los ribosomas necesitan una A para dormir
Samuel B Sondalle1, Susan J Baserga2
1Department of Genetics, Yale University School of Medicine, New Haven, CT 06520, USA.
Cell
|May 6, 2017
Resumen
Los ritmos diurnos de los mamíferos influyen en el tamaño del hígado. Comer durante los períodos activos controla estos cambios en el tamaño del hígado a través de un mecanismo nuclear que regula la producción de ribosomas.
Área de la Ciencia:
- Fisiología
- Biología molecular
- Cronología
Sus antecedentes:
- Muchos procesos biológicos en los mamíferos exhiben ciclos diurnos (diarios).
- Estos ritmos circadianos son cruciales para las funciones fisiológicas, incluido el metabolismo y la función de los órganos.
Objetivo del estudio:
- Investigar los mecanismos que controlan los cambios de tamaño diurnos en el hígado de los mamíferos.
- Determinar el papel del comportamiento alimentario y la regulación nuclear en los ritmos diurnos del hígado.
Principales métodos:
- El estudio utilizó modelos de ratón para observar variaciones en el tamaño del hígado.
- Se investigó el impacto del tiempo de alimentación en los cambios diurnos del hígado.
- Mecanismos nucleares analizados, específicamente centrados en la producción de ribosomas.
Principales resultados:
- Se observaron fluctuaciones diurnas del tamaño del hígado en ratones.
- La ingesta de alimentos durante la fase activa normal (tiempo de vigilia) fue esencial para estos cambios de tamaño diurnos.
- Un mecanismo nuclear que modula la producción de ribosomas fue identificado como un controlador clave.
Conclusiones:
- Los cambios diurnos en el tamaño del hígado dependen de la ingesta de nutrientes durante el período activo.
- La regulación nuclear de la biogénesis ribosómica juega un papel crítico en la mediación de estos ritmos fisiológicos.
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