人类胃癌的进展和稳定ATG2B通过RNF5结合,由自相关的CircDHX8促进
Guanxin Wei1, Xiang Chen1, Tuo Ruan1
1Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
Cell death & disease
|June 12, 2024
概括
循环RNA circDHX8通过增强自促进胃癌 (GC) 的进展. 它通过抑制其降解来增加ATG2B蛋白水平,促进细胞增殖和GC中的入侵. 这项研究揭示了GC恶性瘤中circDHX8的新型机制.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 循环RNAs (circRNAs) 在胃癌 (GC) 进展中的作用是一个新兴的研究领域.
- 自在癌症中起着复杂的作用,影响瘤抑制和进展.
- 在自和GC恶性瘤之间的相互作用中,circDHX8的特定参与尚未得到充分理解.
研究的目的:
- 调查 hsa_circ_003899 (circDHX8) 导致胃癌 (GC) 恶性病的机制.
- 阐明circDHX8在调节GC细胞内自的作用.
- 为了确定控制circDHX8-介导的GC进展促进的分子相互作用.
主要方法:
- 在GC组织中使用循环-seq和微阵列数据 (GSE83521) 对circRNAs的差异表达分析.
- 使用qPCR和桑格测序验证circRNA表达.
- 在体外和体外功能测试以评估circDHX8.8的作用.
- 西方涂抹,免疫光和传输电子显微镜用于研究自.
- 生物信息学分析,RNA下拉,质谱 (MS) 和RNA免疫沉 (RIP) 来确定分子机制.
主要成果:
- 发现Hsa_circ_0003899 (circDHX8) 在GC组织中被上调,并通过增强细胞自促进恶性进展.
- CircDHX8通过防止其在维基因中介的降解来增加ATG2B蛋白水平,从而促进GC细胞的增殖和入侵.
- CircDHX8直接与E3无素蛋白联酶RNF5相互作用,抑制了RNF5介导的ATG2B降解. 通过SIRT1去乙化ATG2B增强了它与RNF5.5的结合.
结论:
- 在胃癌中,circDHX8起到关键的瘤性circRNA的作用.
- CircDHX8通过通过稳定ATG2B蛋白来增强自的新机制促进GC进展.
- 准circDHX8或其下游效应器可能为胃癌提供治疗策略.
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