通过ApAF增强与记忆相关的长期促进,ApAF是一种新型的转录因子,它从CREB1和CREB2下游起作用
D Bartsch1, M Ghirardi, A Casadio
1Howard Hughes Medical Institute, Center for Neurobiology and Behavior, College of Physicians and Surgeons of Columbia University and New York State Psychiatric Institute, 722 West 168th Street New York, NY 10032, USA.
Cell
|December 7, 2000
概括
研究人员在Aplysia中确定了ApAF,这是一种对长期记忆至关重要的基因. 这种转录激活剂从CREB1和ApCREB2下游工作,增强状撤回反应中的记忆形成.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 细胞神经科学 细胞神经科学
背景情况:
- 记忆形成涉及突触可塑性,特别是促进神经连接.
- 在Aplysia的部撤回反射中,短期和长期记忆取决于不同的分子通路.
- 关键的分子参与者包括CREB1,ApCREB2和ApC/EBP,它们调节了从短期到长期记忆的过渡.
研究的目的:
- 在长期记忆形成的分子级联中,识别作用于CREB1下游的新型基因.
- 调查已识别的转录激活剂ApAF在Aplysia部撤回反射的敏感化中的作用.
主要方法:
- 在Aplysia感官和运动神经元中研究了基因表达和蛋白质相互作用.
- 利用分子技术研究血清激素刺激和基因操纵对突触促进的影响.
- 通过检查其必要性及其过度表达的影响来评估ApAF在长期记忆中的功能作用.
主要成果:
- 鉴定了ApAF,一种由蛋白激酶A刺激的转录激活剂,作为CREB1.1的下游目标.
- 证明 ApAF 与 ApC/EBP 和 ApCREB2 相互作用.
- 显示ApAF对于由血清素,CREB1激活或ApCREB2脱抑诱导的长期促进至关重要.
- 发现过度表达ApAF显著增强了长期促进.
结论:
- ApAF是CREB1和ApCREB2的关键基因,在建立长期记忆中发挥着必要的作用.
- ApAF充当分子环节,整合关键调节蛋白的信号,以促进长期的突触可塑性.
- ApAF 是一个强烈的候选人,用于增强记忆的基因,提供了对记忆巩固的分子机制的见解.
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