通过具有低质子导电性的通道罗多普辛减少神经元酸化
Rebecca Frank Hayward1, F Phil Brooks2, Shang Yang3
1School of Engineering and Applied Sciences, Harvard University, Cambridge, United States.
eLife
|October 6, 2023
概括
像CheRiff这样的高电流通道罗多普辛因质子运输而导致神经元酸化. 研究人员确定了低质子透性opsins,PsCatCh2.0和ChR2-3M,以减轻光遗传学中的这个问题.
科学领域:
- 神经科学是一个神经科学.
- 生物物理学的生物物理.
- 视觉遗传学 视觉遗传学
背景情况:
- 道罗多普辛是光激活的离子通道,用于光遗传学.
- 频道罗多普辛的质子透性可能导致细胞内酸化.
- 这种酸化可能会对细胞功能和健康产生负面影响.
研究的目的:
- 为了研究道罗多普辛引起的刺激引起的酸化现象.
- 为了识别和表征具有减少质子透性的通道罗多普辛.
- 评估这些新型光素对光遗传学应用的适用性.
主要方法:
- 在神经元培养和HEK细胞单层中利用光遗传刺激.
- 使用pH敏感指标测量细胞内pH值变化.
- 描述了通道罗多普辛的特性,包括光电流和质子透性.
- 评估了与电压成像工具的光谱兼容性.
主要成果:
- 高电流通道rhodopsin CheRiff的激活诱导了显著的神经元酸化,在树突中比 soma 更快.
- 实验证实了通过素的质子运输是酸化的原因.
- 确定了PsCatCh2.0和ChR2-3M作为具有大光电流和低质子透性的通道 rhodopsins.
- PsCatCh2.0 证明了与 QuasAr6a 电压成像的优良动力学和光谱兼容性.
结论:
- 刺激引起的酸化是光遺傳學應用的一大關鍵因素.
- 具有低质子透性的频道罗多普辛,如PsCatCh2.0,提供了一个有前途的解决方案.
- 这些低透性的opsins可以帮助在光遗传学操纵和治疗干预期间保持细胞健康.
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