在小鼠透镜中TRPV1-依赖的NKCC1激活涉及整合素和管氨酸细胞骨架
Mohammad Shahidullah1,2, Amritlal Mandal1, Nicholas A Delamere1,2
1Department of Physiology, University of Arizona, Tucson, Arizona, USA.
Journal of cellular physiology
|July 17, 2024
概括
在小鼠透镜表皮中的整合素激活触发TRPV1通道,从而通过ERK1/2信号传递激活NKCC1,涉及细胞骨. 这一途径对于透应激反应至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 眼睛生理学 眼睛生理学
- 分子机制的分子机制
背景情况:
- 超的溶液通过TRPV1和ERK1/2信号激活了透镜中的NKCC1.
- 集成蛋白和细胞骨架网络与细胞对透应激反应有关.
研究的目的:
- 研究整合素和TRPV1-依赖NKCC1在小鼠透镜表皮中的激活之间的关联.
- 阐明细胞骨在这个信号通路中的作用.
主要方法:
- 使用野生类型和TRPV1淘汰赛小鼠镜片和初级培养镜片表皮.
- 测量了对布米坦胺敏感的Rb吸收,以评估NKCC活动.
- 使用的整合素激动剂 (卢卡德林-1),微管稳定剂 (帕克利塔塞尔),TRPV1激动剂 (素),TRPV1激动剂 (A889425) 和ERK抑制剂 (U0126).
- 评估ERK1/2激活和细胞质升高.
主要成果:
- 卢卡德林-1增加了Rb的吸收,表明NKCC的激活,这是被帕克利塔克塞尔阻止的.
- 卢卡德林-1和素诱导了ERK1/2的激活,被帕克利塔塞尔抑制.
- TRPV1对抗剂和ERK抑制剂阻断了白血素-1-诱导的Rb吸收.
- 卢卡德林-1在TRPV1淘汰镜头中没有增加Rb的吸收.
- 超的刺激诱导的ERK1/2激活和Rb吸收被帕克利塔塞尔阻止.
- 卢卡德林-1诱导野生类型的升,但不是TRPV1淘汰细胞.
结论:
- 整合素激活与TRPV1通道和透镜表皮中的管素细胞骨有关.
- 整合素激活或高度刺激可能导致TRPV1通道开放,启动下游ERK1/2和NKCC1反应.
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