通过使用直接随机光学重建显微镜 (dSTORM) 来分析抗氧化反应中PC12细胞中的1型 ангиотензинII受体聚类
Hayyaf S Aldossary1,2, Daniel J Nieves3, Deirdre M Kavanagh4
1School of Biomedical Sciences, Institute of Clinical Sciences, University of Birmingham, Birmingham, UK. hxa807@student.bham.ac.uk.
Advances in experimental medicine and biology
|June 15, 2023
概括
在氧敏感细胞中研究了 angiotensin II 受体1型 (AT1R) 的纳米分布. 缺氧改变了AT1R集群,这表明它在增强敏感性方面发挥了作用.
科学领域:
- 细胞生理学 细胞生理学
- 分子细胞生物学分子细胞生物学
- 神经科学是一个神经科学.
背景情况:
- ангиотензин II (Ang II) 是稳居的关键激素.
- ангиотензинII受体1型 (AT1R) 存在于氧敏感细胞中,如心动脉体I型细胞.
- 格II和AT1R活动增加了细胞功能,但它们的纳米分布和对缺氧的反应是未知的.
研究的目的:
- 为了确定在normoxic条件下AT1R的纳米分布.
- 调查缺氧如何改变AT1R单分子排列和聚类.
主要方法:
- 使用直接随机光学重建显微镜 (dSTORM) 可视化AT1R纳米分布.
- 使用PC12细胞作为模型系统.
- 细胞被暴露在24小时的诺莫克西克和低氧 (1% O2) 条件下.
主要成果:
- 在细胞表面上,AT1Rs形成明显的,平均密度约为3个/μm2.
- 集群面积差异很大,从1.1 × 10−4到3.9 × 10−2μm2.2不等.
- 低氧暴露导致AT1R最大集群面积增加,表明超级集群形成.
结论:
- AT1R的纳米分布是可测量的,并以集群为特征.
- 缺氧显著改变AT1R集群,这表明在氧敏感细胞中增强Ang II敏感性的机制.
- 这些发现有助于理解细胞对缺氧和Ang II信号的反应.
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