FBP1控制了老化的MASH肝细胞的肝癌演变
Li Gu1,2,3, Yahui Zhu4,5, Shuvro P Nandi6,7,8
1Laboratory of Gene Regulation and Signal Transduction, Departments of Pharmacology and Pathology, School of Medicine, University of California San Diego (UCSD), La Jolla, CA, USA. ligu@scu.edu.cn.
Nature
|January 1, 2025
概括
代谢功能障碍相关的脂肪肝炎 (MASH) 可能导致肝癌 (HCC). 研究人员发现,果糖-1,6-二酸酶1 (FBP1) 的下降通过促进细胞增殖和DNA突变使HCC的进展成为可能.
科学领域:
- 肝病学
- 癌症学
- 分子生物学
背景情况:
- 肝细胞癌 (HCC) 是由于病毒或代谢功能障碍相关的脂肪肝炎 (MASH) 引起的肝损伤.
- MASH诱导肝细胞衰老,是一种抑制瘤的反应,但其绕过促进HCC的机制尚不清楚.
- 衰老与DNA损伤有关,了解它在HCC发育中的作用至关重要.
研究的目的:
- 为了阐明MASH诱导的HCC中瘤抑制衰老反应是如何规避的.
- 确定从MASH转变为HCC的关键分子参与者.
- 了解果糖-1,6-二酸酶1 (FBP1) 在HCC发病过程中的作用.
主要方法:
- 确定FBP1是p53的目标基因.
- 对老化MASH肝细胞和人类HCC的FBP1表达的分析.
- 研究AKT和NRF2在调节FBP1和p53降解中的作用.
- 用小鼠模型和人体样本进行研究以验证结果.
主要成果:
- 在衰老的MASH肝细胞中FBP1升高,但在大多数人体肝细胞中通过促进剂高甲基化和蛋白质体降解被抑制.
- 在癌前肝细胞和HCC前代细胞中,FBP1水平下降,与AKT和NRF2激活相吻合.
- AKT和NRF2加速FBP1和p53的降解,促进衰老的HCC原体的增殖和代谢活动.
- 一个涉及NRF2,FBP1,AKT和p53的衰老逆转代谢开关促进了MASH- HCC进展的DNA损伤积累.
结论:
- 由AKT和NRF2驱动的FBP1的下降是绕过衰老并使MASH的HCC发展成为可能的关键一步.
- 这种NRF2- FBP1- AKT- p53代谢途径促进肝癌进展所需的突变的积累.
- 针对这种途径可以为MASH相关的HCC提供新的治疗策略.
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