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Piezo1和Piezo2是不同的机械激活阴离子通道的重要组成部分
Bertrand Coste1, Jayanti Mathur, Manuela Schmidt
1Department of Cell Biology, The Scripps Research Institute (TSRI), La Jolla, CA 92037, USA.
Science (New York, N.Y.)
|September 4, 2010
概括
研究人员确定Piezo1和Piezo2蛋白质是机械激活 (MA) 离子通道的重要组成部分. 这些通道对于感知触觉,疼痛和调节血压至关重要.
科学领域:
- 生物物理学的生物物理.
- 分子生物学分子生物学
- 神经科学是一个神经科学.
背景情况:
- 机械刺激对于触觉,疼痛,听觉和血压调节等生理过程至关重要.
- 在许多细胞中观察到机械激活 (MA) 离子通道活性,但特定的分子参与者仍未确定.
研究的目的:
- 为了确定负责机械激活 (MA) 离子通道电流的分子组件.
- 描述候选基因在神经细胞中介MA电流中的作用.
主要方法:
- 在小鼠神经母细胞瘤细胞系中利用表达特征和RNA干扰 (RNAi) 敲击.
- 通过过度表达和基因淘汰实验,研究了Piezo1和Piezo2蛋白的功能.
- 在Piezo2敲击后,检查了背部根结质神经元中的MA电流.
主要成果:
- 确定了Piezo1 (Fam38A) 作为在小鼠神经母细胞瘤细胞中MA电流所需的基因.
- 证明过度表达小鼠Piezo1或Piezo2诱导了不同的MA电流.
- 显示Piezo2在背部根结质神经元中的敲击特别减少了快速适应MA电流.
结论:
- 提出Piezo蛋白 (Piezo1和Piezo2) 是机械激活 (MA) 离子通道的重要组成部分.
- 突出Piezos跨物种的保护性质,表明它在机械传导中发挥着基本作用.
- 建立Piezos作为关键参与者在涉及机械刺激的感觉路径.
相关概念视频
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01:12Mechanically-gated Ion Channels
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