活动依赖转录因子NPAS4调节域特异性抑制
Brenda L Bloodgood1, Nikhil Sharma, Heidi Adlman Browne
11] Department of Neurobiology, Harvard Medical School, Boston, Massachusetts 02115, USA [2] Division of Biological Sciences, University of California San Diego, La Jolla, California 92093, USA [3].
Nature
|November 9, 2013
概括
在小鼠中,行为驱动的NPAS4表达重新安排CA1金字塔神经元上的抑制突触. 这种调节增加了体内抑制,同时减少了树突抑制,影响了神经元输出和可塑性.
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
- 计算神经科学是一种神经科学.
背景情况:
- 抑制性神经元通过金字塔神经元上的突触调节神经电路信息流.
- 实体和树突抑制差异性控制神经元刺激性和可塑性.
- NPAS4 (NPAS4) 是一种活动依赖的转录因子,调节抑制性突触的数量和功能.
研究的目的:
- 研究NPAS4在协调不同神经元域上的抑制突触分布中的体内作用.
- 阐明NPAS4如何影响海马体CA1金字塔神经元中的体相对树突抑制.
主要方法:
- 利用小鼠模型研究海马中的NPAS4功能.
- 分析了行为驱动的NPAS4表达及其对抑制突触分布的影响.
- 研究了NPAS4目标基因,如脑衍生神经营养因子 (BDNF) 在调解这些影响中的作用.
主要成果:
- 由行为驱动的NPAS4表达诱导了CA1金字塔神经元上抑制性突触的再分配.
- 在细胞体 (soma) 上,NPAS4增加了抑制性突触数量,同时在角质树突上减少了它.
- 鉴定了NPAS4向基因BDNF作为一个调解者,特别调节体质抑制.
结论:
- 通过NPAS4诱导,感官刺激通过差异控制神经元抑制的空间特征.
- 这种空间重组通过增强体内抑制来限制神经元输出.
- 这些发现表明,NPAS4通过调节抑制来创造一种允许可塑性的树突环境.
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