PLK1通过调节酸化依赖的UHRF1蛋白稳定性来维持DNA甲基化和细胞活力
Yuchong Peng1,2,3, Youhong Liu4,5, Rirong Zheng1,2,3
1Key Laboratory of Clinical Precision Pharmacy of Guangdong Higher Education Institutes, The First Affiliated Hospital, Guangdong Pharmaceutical University, Guangzhou, Guangdong, 510699, China.
Cell death discovery
|October 3, 2023
概括
波洛基因酶1 (PLK1) 抑制通过向UHRF1蛋白稳定性来破坏DNA甲基化. 这导致瘤抑制基因表达增加和细胞活力降低,揭示了PLK1抑制剂的新抗癌机制.
科学领域:
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 癌症生物学 癌症生物学
背景情况:
- PLK1是线粒分裂的关键调节者.
- 之前还没有确定PLK1在DNA甲基化中的作用.
- 基因甲基化对于基因表达调节和瘤抑制至关重要.
研究的目的:
- 研究PLK1在DNA甲基化中的新型作用.
- 阐明PLK1影响DNA甲基化的分子机制.
- 为了确定涉及PLK1抑制的潜在抗癌策略.
主要方法:
- 基于细胞的测试来评估DNA甲基化水平.
- 西方涂抹分析蛋白质水平和相互作用.
- 免疫沉用于研究蛋白质与蛋白质相互作用 (PLK1-UHRF1,UHRF1-USP7).
- 定量PCR测量基因表达水平.
主要成果:
- 抑制PLK1导致全球DNA低甲基化.
- PLK1在血清265中酸化UHRF1,通过USP7招募稳定它.
- 抑制PLK1导致UHRF1通过ubiquitin-proteasome途径降解.
- UHRF1降解减少了DNMT1对染色质的招募,降低了DNA甲基化.
- 减少DNA甲基化导致瘤抑制基因表达升高,细胞活力降低.
结论:
- PLK1在通过UHRF1-DNMT1通路维持DNA甲基化方面发挥着新的作用.
- 抑制PLK1会破坏UHRF1的稳定性,导致低甲基化和瘤抑制基因的激活.
- 向PLK1通过调节表观遗传调节提供了潜在的抗癌策略.
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