KMT5C调节肝脏葡萄糖生成的非催化机制
Qingwen Zhao1,2, Xuan Cui1, Qi Zhu1
1Key Laboratory of Metabolism and Molecular Medicine of the Ministry of Education, Department of Biochemistry and Molecular Biology of School of Basic Medical Sciences, Fudan University, Shanghai, China.
Nature communications
|February 10, 2025
概括
氨酸甲基转移酶KMT5C通过稳定PGC-1α,独立于其甲基转移酶活性来调节肝脏葡萄糖的产生. 这一发现为糖尿病患者的血糖水平管理提供了新的见解.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
- 代谢调节 代谢调节 代谢调节 代谢调节
背景情况:
- 氨酸甲基转移酶KMT5C (KMT5C) 沉积H4K20me3,与基因抑制有关.
- 在肝脏生理学,特别是葡萄糖代谢中,KMT5C的作用仍然未被描述.
研究的目的:
- 为了研究KMT5C在肝脏葡萄糖生成中的功能.
- 阐明KMT5C调节葡萄糖生产的分子机制.
主要方法:
- 分析Kmt5c基因表达反应的禁食和葡萄糖.
- 肝细胞特异性Kmt5c淘汰赛小鼠模型.
- 生物化学测试以评估PGC-1α的稳定性和无处不在.
- 评估葡萄糖生成基因表达和葡萄糖输出.
- 在糖尿病小鼠模型和人类患者中分析KMT5C水平.
主要成果:
- Kmt5c是由肝脏中的禁食和葡萄糖诱导的.
- 肝细胞中Kmt5c缺乏会降低葡萄糖生成基因表达和禁食葡萄糖输出.
- KMT5C通过防止其无化和降解来稳定PGC-1α,独立于其甲基转移酶活性.
- KMT5C抑制了E3酶RNF34与PGC-1α的相互作用.
- 在糖尿病模型和患者中观察到肝脏KMT5C水平升高,而KMT5C的淘汰改善了血糖控制.
结论:
- KMT5C是一种肝脏葡萄糖生成的新型调节剂.
- KMT5C通过调节PGC-1α蛋白稳定性来控制葡萄糖的产生.
- KMT5C代表了一种潜在的治疗点,用于治疗糖尿病高血糖症.
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