由AMPK激活的BAP1调节了pVHL稳定性和瘤抑制功能
Mei Li1,2, Lei Huang2, Jiayi Chen2
1Department of Clinical Pharmacy, Central People's Hospital of Zhanjiang, Zhanjiang, China.
失调的葡萄糖代谢破坏了瘤抑制剂希佩尔-林道 (VHL) 蛋白的稳定. 能量压力激活AMPK,后者酸化BAP1,稳定VHL及其在癌症中的瘤抑制功能.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症新陈代谢 癌症新陈代谢
背景情况:
- ·希佩尔-林道 (VHL) 蛋白 (pVHL) 是一种瘤抑制剂,在野生型VHL的癌症中经常降低调控,但机制尚不清楚.
- 异常的葡萄糖代谢是癌症的标志,但其与pVHL稳定性和功能的联系尚不确定.
研究的目的:
- 调查葡萄糖平衡与pVHL周转率之间的联系.
- 阐明失调葡萄糖代谢影响癌症pVHL功能的机制.
主要方法:
- 在癌细胞中研究了葡萄糖饥饿,2-脱氧葡萄糖 (2-DG) 和甲胺下的pVHL不稳定.
- 使用了体外和体内模型,包括患者衍生的异种移植.
- 在临床癌症样本中分析了酸化AMPKα,BAP1和pVHL水平之间的相关性.
主要成果:
- 失调的葡萄糖代谢使胰腺管腺癌,结肠直肠癌和卵巢癌细胞中的pVHL不稳定.
- 能量压力激活AMP激活蛋白激酶 (AMPK),该蛋白激活BAP1,增强其与pVHL的相互作用和稳定.
- 破坏BAP1酸化会损害pVHL的稳定,加速瘤的进展;临床数据显示p-AMPKα,pSer123-BAP1和pVHL之间存在正相关性.
结论:
- 一个新的机制将异常的葡萄糖代谢与受损的BAP1-pVHL瘤抑制轴联系起来.
- 针对这种途径的治疗策略可能为下调VHL和改变葡萄糖代谢的癌症提供新的治疗方法.
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