TRPV4调解气膜上皮质屏障的完整性,并诱导ADAM10驱动的E-卡德林分泌
Lena Schaller1, Thomas Gudermann1, Alexander Dietrich1
1Walther Straub Institute for Pharmacology and Toxicology, Member of the German Center for Lung Research (DZL), Medical Faculty, LMU-Munich, Nussbaumstrasse 26, 80336 Munich, Germany.
暂时受体潜在化物4 (TRPV4) 通道调节膜上皮质屏障的完整性. TRPV4的激活导致E-cadherin裂变和透性增加,这是一个涉及金属蛋白酶10 (ADAM10) 的过程.
科学领域:
- 肺部生理学 肺部生理学
- 细胞生物学 细胞生物学
- 皮质生物学 皮质生物学
背景情况:
- 暂时受体潜在化物4 (TRPV4) 通道与肺部疾病有关.
- 在膜上皮质中TRPV4的特定功能尚不清楚.
研究的目的:
- 研究TRPV4在维持膜上皮屏障完整性的作用.
- 阐明TRPV4介导对膜上皮细胞的影响背后的分子机制.
主要方法:
- 基于阻抗的阻抗测量来自野生型和TRPV4缺乏的小鼠的初级膜上皮类型I (AT1) 细胞.
- 使用GSK1016790A和低pH的TRPV4激活.
- 西方涂抹以评估E-cadherin蛋白水平和碎片.
- 药理上抑制ADAM10的作用.
主要成果:
- 低pH值和TRPV4的药理激活都降低了AT1屏障抵抗力.
- TRPV4的激活导致了E-cadherin C-终端片段的形成,表明了裂变.
- 在TRPV4缺乏的细胞中,这些影响显著减少.
- 由TRPV4介导的E-cadherin裂变被一种分解素和金属蛋白酶10 (ADAM10) 抗剂抑制.
结论:
- TRPV4在调节膜上皮质屏障透性方面发挥着至关重要的作用.
- TRPV4的激活刺激了一条信号通路,涉及的流入和金属蛋白酶驱动的E-cadherin ectodomain脱落.
- 这一发现为TRPV4对肺病理的贡献提供了新的见解.
更多相关视频
09:12Optimal Lentivirus Production and Cell Culture Conditions Necessary to Successfully Transduce Primary Human Bronchial Epithelial Cells
Published on: July 22, 2016
14:48Flow Cytometric Isolation of Primary Murine Type II Alveolar Epithelial Cells for Functional and Molecular Studies
Published on: December 26, 2012
相关概念视频
Cadherins in Tissue Organization
Cell Sorting During Development
Cell sorting plays an...
Adherens Junctions
Adherens Junctions are Dynamic
Structure of Cadherins
Tight Junctions
Tension Response at Adherens Junctions
α-Catenin as a Mechanosensory Protein
The α-catenin of adherens junctions is an allosteric protein with three VH (vinculin...
Intracellular Signaling Affects Focal Adhesions
Some...
