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Brg1和RUNX1在调节小鼠心肌细胞中的TRPM4通道中的协同作用

Tao Ban^1,2,3, Xianhui Dong¹, Ziyue Ma¹

¹Harbin Medical University and Department of Pharmacology (State Key Laboratory of Frigid Zone Cardiovascular Diseases, Ministry of Science and Technology; State Key Labratoray-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education) at College of Pharmacy, Harbin, China.

Frontiers in pharmacology

|December 27, 2024

概括

Brg1和RUNX1形成了一个复合体来调节TRPM4表达,这对心脏功能至关重要,特别是在缺氧期间. 这揭示了心脏疾病的新治疗点.

科学领域:

心血管生物学心血管生物学
分子心脏病学分子心脏病学
基因规则基因规则

背景情况:

暂时受体潜在的 Melastatin 4 (TRPM4) 通道与心脏导电异常有关.
Brg1是一种依赖ATP的染色体重塑剂,对心脏基因表达和电生理学稳定性至关重要.
Brg1对TRPM4表达和功能的调节作用以前没有被研究过.

研究的目的:

阐明Brg1在调节心肌细胞中TRPM4表达和功能的作用.
研究 Brg1介导的TRPM4调节的基础分子机制,包括与转录因子的相互作用.
评估 Brg1 对 TRPM4 在低氧压力条件下对心脏病相关的影响.

主要方法:

在小鼠心肌细胞和HEK293细胞中,Brg1的过度表达和降低.
分子技术包括西方斑点,qPCR,免疫光和补丁电生理学.
生物信息分析,共免疫沉,双化酶记者测定和染色体免疫沉以确定分子相互作用和转录调节.

主要成果:

Brg1积极调节TRPM4表达并调节TRPM4通道活动.
Brg1抑制显著降低了受过氧心肌细胞的TRPM4过度表达.
Brg1和RUNX1形成了一个转录复合体,与TRPM4促进体结合,调节其活性.

结论:

Brg1和RUNX1协同调节TRPM4的表达和功能,特别是在低氧条件下.
这些发现为心脏中TRPM4转录调节提供了新的见解.
准Brg1-RUNX1-TRPM4通路为低氧相关心脏疾病提供了潜在的治疗策略.

关键词:

这就是BRG1的原因.在Runx1上使用.TRPM4 TRPM4 在线播放这是心肌细胞 (cardiomyocyte).缺氧缺氧是指缺氧的情况.

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