在ER中的Ca2+耗尽导致通过TRPC6通道存储运行的Ca2+进入小鼠的棕色脂肪细胞
R Hayato1, T Matsumoto, Y Higure
1Laboratory of Anatomy and Physiology, School of Nutritional Sciences, Nagoya University of Arts and Sciences, Takenoyama, Nissin-City, Aichi, Japan. hayato@nuas.ac.jp.
Physiological research
|March 11, 2024
概括
在小鼠棕色脂肪细胞中的β3-上腺激活会通过TRPC6通道触发的释放和储存的进入 (SOCE). 这一过程对热生成至关重要,并可能为肥胖提供治疗效益.
科学领域:
- 细胞生理学 细胞生理学
- 代谢研究研究 代谢研究
- 信号传递 信号传递
背景情况:
- 棕色脂肪细胞中的β3-上腺激活刺激了线粒体和内分泌网膜 (ER) 中的释放.
- 这种释放导致储存运行的进入 (SOCE),以应对ER耗尽.
- 了解SOCE的机制对于新陈代谢调节和肥胖治疗至关重要.
研究的目的:
- 为了研究在小鼠棕色脂肪细胞中参与存储运行的入 (SOCE) 的特定路径.
- 阐明TRPC6通道在经ER耗尽后调解SOCE中的作用.
主要方法:
- 细胞内度 ([Ca2+]i) 使用度测量进行测量.
- 使用环酸 (CPA) 诱导存储运行的入 (SOCE),以阻止SERCA.
- 使用选择性阻断剂 (2-APB,ML-9,GsMTx-4) 和激动剂 (OAG) 评估了TRPC6通道的参与.
- 对TRPC6的基因和蛋白质表达进行了分析,使用RT-PCR和Western blot.
主要成果:
- 环酸 (CPA) 的使用在小鼠棕色脂肪细胞中诱导了SOCE.
- 由CPA诱导的SOCE被TRPC6选择性阻断剂抑制,但不是TRPC1/4/5阻断剂.
- TRPC6通道激动剂刺激了的进入,并在棕色脂肪组织中检测到TRPC6mRNA和蛋白质.
- 确定TRPC6是参与SOCE的关键通道.
结论:
- TRPC6通道是小鼠棕色脂肪细胞中存储运行的进入 (SOCE) 的重要途径.
- 通过TRPC6介导的进入,通过激活脱基酶和UCP1的表达,有助于热生成.
- 针对棕色脂肪细胞中TRPC6介导的信号,为肥胖和代谢综合征提供了潜在的治疗策略.
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