氧化作为发展重塑过程中轴突退化和再生之间的切换机制
Dana Rabinovich1, Shiri P Yaniv1, Idan Alyagor1
1Department of Molecular Cell Biology, Weizmann Institute of Sciences, Rehovot 7610001, Israel.
Cell
|January 16, 2016
概括
神经元在成长和削减状态之间切换. 通过E75核受体调节的氧化 (NO) 信号控制这种开关,促进切割,同时抑制神经元发育过程中的再生.
科学领域:
- 神经科学
- 发育生物学
- 分子生物学
背景情况:
- 神经元发育涉及动态状态转换,包括轴突外生长,修剪和再生.
- 果体 (MB) 作为研究定型神经元重塑的模型.
- 核受体在调节细胞过程中发挥关键作用,包括神经元发育.
研究的目的:
- 研究血结合核受体E75在Drosophila MB γ神经元发育重塑中的作用.
- 阐明调节神经元修剪与再生之间的信号通路.
- 了解神经元再生能力的发展调节的分子机制.
主要方法:
- 在Drosophila melanogaster中进行基因实验.
- 在活体培养的Drosophila大脑上进行药理操作.
- 核受体相互作用和氧化 (NO) 信号通路的分析.
主要成果:
- 核受体E75对于MB γ神经元的发育重生至关重要,但不是最初的轴突增长.
- 神经产生的氧化 (NO) 促进了轴突的削减,同时抑制了重生.
- 高NO水平会破坏E75和UNF核受体之间的相互作用,抑制再生.
- 氧化合成酶 (NOS) 的活性在再生开始时被降低,部分是由抑制性NOS异型.
结论:
- 在神经元重塑过程中,氧化 (NO) 信号作为退行性 (修剪) 和再生性 (再生) 状态之间的关键切换.
- 通过NO水平调节的E75核受体在促进神经元再生中发挥着关键作用.
- 对于神经元再生事件的精确时间,有助于NO生产的发育调节.
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