相关实验视频
Updated: Jun 12, 2025

Monitoring ER/SR Calcium Release with the Targeted Ca2+ Sensor CatchER+
Published on: May 19, 2017
激素激发的Ca2+从功能连接的内质网膜和bEND.3内皮细胞中的lysosomal Ca2+储存中释放
Cing-Yu Chen1, Yu-Jen Chen, Cheng-An Wang
1Department of Physiology, China Medical University, Taichung, Taiwan.
细胞内膜网膜 (ER) 和溶解体是连接的细胞内 (Ca2+) 储存器. 一个存储器的耗尽不会影响另一个存储器,但它们之间的交流会调节Ca2+的释放.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 身体生理学 身体生理学
背景情况:
- 细胞内膜网膜 (ER) 和溶酶体是细胞内 (Ca2+) 的关键储存器.
- 这些器官在物理和功能上相互连接.
- 了解它们的沟通对于细胞信号传输至关重要.
研究的目的:
- 为了研究激素激发的Ca2+从ER和溶酶体释放到小鼠微血管内皮细胞BEND.3细胞中.
- 为了确定ER和溶酶体Ca2+储存之间的功能关系.
- 阐明调节Ca2+动态的交叉交谈机制.
主要方法:
- 在bEND.3细胞中使用了Ca2+成像技术.
- 使用的特定抑制剂:尼日里辛用于溶酶体,环酸 (CPA) 用于ER.
- 研究了ATP,Ned-19和xestospongin C对Ca2+释放的影响.
主要成果:
- 尼日里所导致的溶酶体Ca2+耗尽并没有影响CPA释放的ER Ca2+,反之亦然.
- 由ATP诱导的Ca2+释放涉及ER和 lysosomes,部分受Ned-19和xestospongin C的抑制.
- 削减ER或溶解体废除了随后的ATP触发的Ca2+释放,表明交叉对话.
结论:
- ER和 lysosomes 作为不同的,但相互交流的 Ca2+ 储存器.
- 一个器官的填充状态会影响另一种激素刺激的Ca2+释放.
- 这种交叉交谈机制对于调节细胞Ca2+信号来说至关重要.
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