缺氧诱导的NDRG1 C端多酸化会损害其瘤抑制功能,在细胞癌中
Qiang Guo1, Mei-Yu Quan2, Jingyu Zheng3
1School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, China.
缺氧触发N-myc下游调节基因1 (NDRG1) C端多酸化,促进其降解和清细胞细胞癌 (ccRCC) 转移. 这突显了NDRG1酸化作为ccRCC进展中的治疗点.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 缺氧是瘤入侵和转移的关键驱动因素.
- N-myc下游调节基因1 (NDRG1) 抑制了清细胞细胞癌 (ccRCC) 的转移.
- 在低氧调节中NDRG1酸化的作用尚不清楚.
研究的目的:
- 在ccRCC中在缺氧下研究NDRG1C端酸化的调节机制和功能意义.
- 阐明NDRG1酸化如何影响表皮质-介质细胞过渡 (EMT) 和ccRCC中的WNT信号.
主要方法:
- 研究了低氧诱导的C端NDRG1多酸化.
- 评估了NDRG1酸化依赖的SUMOylation,无处不在和降解.
- 研究了NDRG1酸化对E-cadherin/β-catenin复合体形成和WNT信号传递的影响.
- 在体外和体外模型中使用了NDRG1倒置和酸化缺陷突变物.
主要成果:
- 缺氧诱导NDRG1的C端多酸化,促进EMT和ccRCC细胞的入侵.
- 在位点328/330和346/356/366的酸化增强了NDRG1的SUMOylation/ubiquitination,导致降解.
- NDRG1酸化破坏了其与E-cadherin/β-catenin的复合体,激活了WNT信号传递.
- NDRG1倒置加速了瘤生长和转移;缺乏酸化的突变物在体内减轻了这些影响.
结论:
- 缺氧诱导的NDRG1的C端多酸化促进了其降解,激活了WNT信号,并导致ccRCC恶性病变.
- 在低氧条件下,NDRG1酸化是ccRCC进展的关键机制.
- 向NDRG1酸化为ccRCC提供了一个潜在的治疗策略.
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