矩阵金属蛋白酶9缺乏促进内源性心肌细胞增殖
Chenying Xiang1, Ning Liu1, Shijie Sun1
1State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China.
Journal of molecular and cellular cardiology
|July 13, 2025
概括
矩阵金属蛋白酶9 (MMP9) 缺乏会在受伤后促进新生儿心肌细胞的增殖. 这是由于代谢向糖解转移而发生的,这种转变是由乙烯基-CoA硫酶1 (ACOT1) 的上调调节介导的.
科学领域:
- 心血管生物学 心血管生物学
- 代谢调节 代谢调节 代谢调节
- 这是心脏再生.
背景情况:
- 矩阵金属蛋白酶9 (MMP9) 影响心肌梗塞后的心脏重塑.
- 目前尚不清楚MMP9在心肌细胞增殖中的具体作用.
研究的目的:
- 研究MMP9在新生儿心肌细胞增殖和心脏修复中的功能.
- 阐明MMP9对心脏再生的影响背后的分子机制.
主要方法:
- 在新生小鼠中进行切除以诱导心脏损伤.
- 患有MMP9缺乏症的小鼠模型 (淘汰赛).
- 综合转录组和蛋白组分析.
- 主要大鼠心肌细胞培养和代谢分析.
主要成果:
- MMP9 缺乏症显著增强了新生儿心肌细胞的增殖和受伤后的单核化.
- 在受伤的新生儿心脏中,MMP9淘汰导致了从氧化酸化到糖解的代谢转变.
- 在MMP9缺陷的心脏中,乙烯基-CoA thioesterase 1 (ACOT1) 的调节升高.
- 过度表达ACOT1促进了心肌细胞的糖解和增殖;2-脱氧-D-葡萄糖抑制了这种效应.
结论:
- 缺乏MMP9会促进心肌细胞的增殖和单核化.
- 这种增殖效应是由代谢向糖解转移所驱动的,由ACOT1.1.介导.
- 向MMP9和相关的代谢途径可能为心脏再生提供新的策略.
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