在清细胞细胞癌中,HIF-2α表达和代谢信号需要ACSS2
Zachary A Bacigalupa1,2,3, Emily N Arner1,2, Logan M Vlach1
1Department of Medicine.
The Journal of clinical investigation
|June 28, 2024
概括
抑制乙-A合成酶2 (ACSS2) 降低了缺氧诱导因子2-α (HIF-2α) 的水平,并抑制了清细胞细胞癌 (ccRCC) 的生长. 这一策略为在ccRCC治疗中向HIF-2α提供了一种新方法.
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:
- 清细胞细胞癌 (ccRCC) 是由VHL损失和异常的HIF-2α信号驱动的.
- 参与乙代谢的ACSS2与ccRCC预后不佳有关.
- 调节HIF-2α为ccRCC提供了一个治疗机会.
研究的目的:
- 研究ACSS2抑制对HIF-2α和ccRCC进展的影响.
- 阐明ACSS2影响HIF-2α稳定性和癌症代谢的机制.
- 探索ACSS2抑制作为ccRCC的补充疗法.
主要方法:
- 利用了ccRCC细胞系,体内模型和初级患者的瘤培养.
- 评估了ACSS2抑制对HIF-2α水平,细胞生长和代谢途径的影响.
- 研究了ACSS2,HIF-2α和E3结合酶MUL1.1之间的相互作用.
主要成果:
- 在不同模型中,ACSS2抑制降低了HIF-2α水平,并抑制了ccRCC细胞生长.
- 治疗降低了糖溶性信号传递,胆固醇代谢和线粒体完整性.
- ACSS2抑制影响了染色质的可访问性,影响了HIF-2α的表达和稳定性.
- 确定了涉及MUL1的HIF-2α的pVHL独立降解途径,部分依赖ACSS2.2.
结论:
- 抑制ACSS2有效降低HIF-2α水平和ccRCC瘤的生长.
- ACSS2通过pVHL依赖和独立的途径调节HIF-2α稳定性的作用.
- 向ACSS2是一种有前途的策略,可以补充ccRCC中现有的HIF-2α向疗法.
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