一个临体前机制调节饥饿诱导的信号传递
Jennifer Giles1, Abbie Sesker1, Marcos Gonzalez1
1Department of Physiology and Pharmacology, Des Moines University Medicine and Health Sciences, West Des Moines, IA, USA.
The FEBS journal
|January 16, 2026
概括
饥饿诱导的信号 (SICS) 涉及溶酶体和ER释放和储存运行的进入 (SOCE). 卡尔莫杜林 (CaM) 通过控制细胞质去除和TRPML1活性来调节SICS.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生理学 生理学 生理学
背景情况:
- 营养物质的枯竭会触发饥饿诱导的信号 (SICS),这对细胞反应至关重要.
- 对于SICS的分子组件和调节机制的理解尚不完全.
研究的目的:
- 阐明SICS的组件和调节,重点关注 (Ca2+) 传感器calmodulin (CaM) 的作用.
- 在SICS.中调查肌体相互作用分子1 (STIM1) 和短暂受体潜在粘脂蛋白-1 (TRPML1) 的参与.
主要方法:
- STIM1和TRPML1.1的过度表达和突变发生.
- 抑制和沉默储存的进入 (SOCE) 和TRPML1 (Mcoln1).
- 为TRPML1 (BS-ML1) 生成一个基因编码的生物传感器.
- 测量细胞内Ca2+信号和细胞质Ca2+去除率.
主要成果:
- STIM1过度表达显著增强了SICS,取决于其Ca2+结合循环;SOCE抑制抑制了SICS.
- TRPML1的活动有助于SICS,Mcoln1的抑制/沉默将SICS减少了35-40%.
- CaM与TRPML1结合,而CaM的可用性会影响SICS动态和细胞质Ca2+的去除.
- BS-ML1验证了TRPML1在营养缺乏引起的SICS中的作用,对细胞外Ca2+和SOCE敏感.
结论:
- SICS涉及从溶解体和ER中相互连接的Ca2+释放,其次是SOCE.
- 卡尔莫杜林 (CaM) 通过TRPML1活性和细胞质Ca2+处理作为SICS大小和动力学的关键调节剂.
- 已确定的CaM-TRPML1相互作用和前机制对于细胞适应营养饥饿至关重要.
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