需要TET2来抑制通过尿素循环的mTORC1信号传递,具有治疗潜力
Jing He1, Mingen Lin1, Xinchao Zhang1
1MOE Key Laboratory of Metabolism and Molecular Medicine, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, China.
Cell discovery
|August 7, 2023
概括
通过抑制mTORC1信号传递,TET2 (十-十一转位2) 抑制细胞生长. 瘤中的TET2缺乏增加了对mTORC1抑制剂的敏感性,这表明了潜在的治疗策略.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 瘤发生涉及复杂的信号通路,调节细胞生长和增殖.
- 已知TET2是一种DNA二氧化酶,可修改DNA甲基化,但其在细胞生长调节中的作用尚不清楚.
研究的目的:
- 研究TET2在调节细胞生长中的功能.
- 阐明TET2影响细胞生长和信号通路的分子机制.
主要方法:
- 研究了TET2在细胞生长和mTORC1信号传递中的作用.
- 研究了TET2的机制,包括mRNA氧化,蛋白质结合和mRNA衰变.
- 评估尿素循环酶mRNA水平和氨酸生产.
- 评估了TET2缺乏瘤细胞对mTORC1抑制的敏感性.
主要成果:
- TET2抑制mTORC1信号传递,从而抑制细胞生长并促进自.
- 通过mRNA氧化,TET2充当5甲基素 (5mC) "擦除器",破坏YBX1-HuR结合并促进尿素循环酶mRNA衰变.
- 这一过程对尿素循环和氨酸生产产生负面调节,导致mTORC1抑制.
- 缺乏TET2的瘤细胞对mTORC1抑制的敏感性增加.
结论:
- 在抑制mTORC1信号和抑制细胞生长方面,TET2发挥着新的作用.
- 通过TET2介导的mRNA氧化将DNA修饰与细胞代谢和生长控制联系起来.
- 抑制mTORC1对于TET2缺乏的瘤来说是一个潜在的治疗策略.
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