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肝细胞中UFMylation缺乏会激活KEAP1-NRF2通路,并有助于肝癌发生
Qian Liang1, Shiwen Xu1, Yaoyao Fang1
1Zhejiang Key Laboratory of Medical Epigenetics, School of Basic Medical Sciences, Key Laboratory of Aging and Cancer Biology of Zhejiang Province, Hangzhou Normal University, Hangzhou, 311121, China.
Redox biology
|January 30, 2026
概括
通过破坏KEAP1-NRF2通路,UFMylation缺乏会促进肝癌的发生. 这项研究揭示了UFL1调节KEAP1的稳定性,影响肝细胞癌的发展,并提供新的治疗点.
科学领域:
- 细胞生物学 细胞生物学
- 分子瘤学分子瘤学
- 生物化学 生化学
背景情况:
- KEAP1-NRF2通路对细胞氧化还原平衡至关重要,并且在肝细胞癌等癌症中经常受到调节.
- 在癌症中驱动异常KEAP1-NRF2通路激活的精确机制仍然不完全理解.
- 一种类似于乌比奎丁的修饰,UFMylation具有至关重要的生物学作用,其缺乏与各种疾病有关.
研究的目的:
- 调查UFMylation在肝脏病理生理学和肝癌发生中的作用.
- 阐明UFMylation影响KEAP1-NRF2通路的分子机制.
- 确定UFL1在肝癌中的临床相关性.
主要方法:
- 产生了肝细胞特异的Ufl1淘汰赛小鼠模型.
- 在Ufl1淘汰赛小鼠中研究了甲基胺 (DEN) 诱导的肝癌发生.
- 使用生化分析,KEAP1被确定为UFMylation基质.
- 根据UFMylation状态,分析了KEAP1和NRF2的蛋白质水平和局部化.
- 在人类肝癌样本中评估了UFL1和KEAP1表达水平.
主要成果:
- 肝细胞特异性Ufl1淘汰赛小鼠表现出肝脏病理变化,并促进了DEN诱导的肝癌发生.
- KEAP1被确定为UFMylation的直接基质.
- 损坏的UFMylation导致KEAP1降解,NRF2核积累,并激活KEAP1-NRF2通路.
- 在人类肝癌组织中,UFL1的表达被发现是下降的,并且与KEAP1水平呈正相关.
结论:
- UFL1在肝脏病理生理学中起着重要作用,部分是通过调节KEAP1-NRF2通路.
- 失调的UFMylation通过影响KEAP1稳定性和NRF2激活,有助于肝癌发生.
- 这些发现为肝癌的分子基础提供了新的见解,并建议UFL1作为潜在的治疗点.
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