在人类癌症中,α-谷氨酸决定了AMPK蛋白合成的能量感应
Wen Mi1, Yun Xue2, Haohang Yan1
1Shanghai Key Laboratory of Metabolic Remodeling and Health, Institute of Metabolism and Integrative Biology; Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Fudan University, Shanghai, China.
Nature chemical biology
|August 22, 2025
概括
代谢物α- ketoglutarate (α- KG) 通过TET- YBX1通路调节AMP激活蛋白激酶 (AMPK) 的翻译. 准这一轴使得癌细胞对能量压力敏感,
科学领域:
- * 分子生物学
- * 细胞代谢
- * 癌症研究
背景情况:
- *AMP激活蛋白激酶 (AMPK) 是促进瘤细胞在压力下存活的关键能量传感器.
- * 需要采取抑制AMPK激活和瘤进展的策略.
- * 调节AMPK转化及其与细胞代谢物的精确机制尚不完全理解.
研究的目的:
- * 阐明α- 酸盐 (α- KG) 在调节AMPK转化中的作用.
- * 调查TET-YBX1轴对α-KG对AMPK的影响.
- * 探索向α-KG-YBX1-AMPK通路的潜力,以使癌细胞对能量压力敏感.
主要方法:
- * 研究了α-KG缺乏和竞争对手在葡萄糖饥饿下对AMPK激活和细胞死亡的影响.
- * 分析了依赖于TET的YBX1转录及其在AMPK蛋白合成中的作用.
- * 在体内评估了对YBX1和GLUT1的治疗潜力.
主要成果:
- * 缺乏α-KG的细胞表现出AMPK激活功能受损,细胞质NADPH耗尽,以及在葡萄糖饥饿下出现脱硫症.
- * α-KG 缺乏抑制了依赖于 TET 的 YBX1 转录,这是人类 AMPK 合成的关键因素.
- * 酸和伊塔康酸,α-KG竞争者,也抑制YBX1-AMPK轴,使细胞对葡萄糖缺乏敏感.
- * 针对瘤源YBX1和GLUT1诱导合成致死性,并减少体内瘤的生长.
结论:
- 通过TET- YBX1轴的AMPK转化,α- 质酸盐 (α- KG) 是能量感应的关键调节剂.
- * 针对α-KG-YBX1依赖的AMPK转化途径可以使人类癌细胞对能量压力敏感.
- * 这一途径为癌症治疗提供了有前途的治疗策略.
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