核局部化HKDC1通过酸化RBBP5促进肝细胞癌,以提高H3K4me3的调节
Ling Ye1, Shengqi Shen2, Qiankun Mao1
1Department of General Surgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, China.
Cell reports
|February 1, 2025
概括
核HKDC1作为蛋白质激酶,化RBBP5,通过激活分裂基因来驱动肝细胞癌 (HCC) 细胞增殖. 准这种激酶活动可以抑制瘤的生长.
科学领域:
- 生物化学 生物化学
- 癌症生物学 癌症生物学
- 分子瘤学分子瘤学
背景情况:
- 代谢酶通过规范性和非规范性作用参与癌症的发病.
- 含基酶域蛋白1 (HKDC1) 具有超出葡萄糖代谢的功能,其在瘤发生中的作用尚未完全阐明.
研究的目的:
- 研究核HKDC1在肝细胞癌 (HCC) 发病过程中的非正规功能.
- 阐明HKDC1促进HCC细胞增殖的分子机制.
主要方法:
- 证明核HKDC1的蛋白激酶活性.
- 确定RB结合蛋白5 (RBBP5) 作为HKDC1酸化的基质.
- 分析MLL1复合组合和素H3氨酸4三甲基化 (H3K4me3) 修饰的分析.
- 评估准HKDC1激酶活性对瘤生长的影响.
- 对RBBP5酸化,HKDC1水平和HCC患者预后的相关性分析.
主要成果:
- 核HKDC1作为蛋白激酶起作用,在Ser497.7处化RBBP5.
- 对于MLL1复合组合和随后的H3K4me3.3,RBBP5酸化是必不可少的.
- 这种修改导致了与线粒分裂相关的基因的转录激活,促进了细胞周期的进展和增殖.
- 抑制HKDC1的蛋白激酶活性,但不能抑制其基酶活性,抑制了瘤的生长.
- 在HCC患者中,RBBP5酸化水平与HKDC1表达和不良预后正相关.
结论:
- HKDC1具有蛋白质激酶功能,通过RBBP5酸化和H3K4me3激活驱动HCC的进展.
- 准HKDC1的激酶活性代表了对HCC的潜在治疗策略.
- RBBP5酸化作为HCC的预后生物标志物.
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