o8G修饰的circPLCE1通过伴侣介导的自抑制肺癌的进展
Qingyun Zhao1,2, Dunyu Cai1,2, Haotian Xu1,2
1School of Public Health, Guangxi Medical University, Nanning, 530021, China.
Molecular cancer
|March 18, 2025
概括
8-oxoguanine (o8G) 修饰的circPLCE1通过调节伴侣介导自 (CMA) 来抑制肺癌的进展. 这一发现为肺癌机制和潜在的治疗点提供了新的见解.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 在RNA生物学,RNA生物学.
背景情况:
- 肺癌仍然是一个重要的健康问题,其分子基础不清楚.
- 循环RNAs (circRNAs) 参与瘤进展,而8-oxoguanine (o8G) 修饰影响RNA命运.
- 之前没有报告o8G修饰circRNAs及其在肺癌中的作用.
研究的目的:
- 为了识别和描述circPLCE1,一个在肺癌中下调的circRNA.
- 调查circPLCE1的o8G修饰及其在肺癌进展中的机械作用.
- 阐明 circPLCE1 在o8G修饰后如何影响肺癌细胞命运和瘤生长.
主要方法:
- 高通量RNA测序用于识别差异表达的circRNAs.
- 甲基化RNA免疫沉降 (MeRIP),免疫光 (IF) 和交联免疫沉降 (CLIP) 来研究circPLCE1 o8G的修饰.
- 在体外和体外功能测试,包括沉默/过度表达系统,TRAP,RIP,Co-IP和记者基因测试,以探索分子机制.
主要成果:
- 反应性氧物种 (ROS) 诱导circPLCE1中的o8G修饰,而AUF1降低了其稳定性.
- circPLCE1在体外和体内显著抑制肺癌进展,表达与瘤阶段和预后相关.
- circPLCE1针对HSC70,增加其无处不在,并通过伴侣介导自 (CMA) 途径调节ATG5依赖的宏自.
结论:
- o8G修饰的circPLCE1通过抑制通过CMA通路的宏自,从而改变细胞命运来抑制肺癌的进展.
- 这项研究为了解肺癌进展机制建立了一个新的理论框架.
- 这些发现确定了o8G修饰的circPLCE1及其相关途径作为肺癌治疗的潜在治疗点.
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