作为生物节律的转录记忆的CREM的适应性诱导性
N S Foulkes1, G Duval, P Sassone-Corsi
1Institut de Génétique et de Biologie Moléculaire et Cellulaire, Strasbourg, France.
Nature
|May 2, 1996
概括
这就是CREM基因.
科学领域:
- 分子生物学分子生物学
- 时间生物学 时间生物学
- 基因规则 基因规则
背景情况:
- 该CREM基因编码ICER抑制剂,对哺乳动物昼夜节律机制至关重要.
- ICER在松果腺中表现出节奏表达,在夜间达到峰值.
- 光,通过上神核 (SCN),通过上腺体信号传递和CREB激活来调节ICER水平.
研究的目的:
- 研究光周期如何影响CREM基因对上腺刺激的反应.
- 阐明转录调节器在调节光周期依赖基因表达中的作用.
主要方法:
- 在不同光周期条件下分析CREM基因转录反应.
- 在调节CREM基因诱导方面,评估CREB和ICER之间的平衡.
主要成果:
- 克雷姆基因对上腺刺激的敏感性取决于前一夜的长度.
- 光周期历史决定了CREM基因是否变得对诱导低敏感或超敏感.
- 不同的响应性是由CREB和ICER之间的动态相互作用来决定的.
结论:
- CREM基因的转录反应是由过去光周期的"记忆"调节的.
- 这种机制提供了关于昼夜系统如何适应基因表达的季节性变化.
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