LncRNA NRON通过增强MDM2对瘤抑制基质的活性来促进瘤发生
Qiannan Guo1,2, Yihui Li1,3, Yunmei Zhang1,4
1Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.
The EMBO journal
|June 29, 2023
概括
长非编码RNANRON与MDM2相互作用,增强其降解瘤抑制剂的活性,如P53. NRON促进瘤形成,并与乳腺癌患者的不良结果有关.
科学领域:
- 分子生物学分子生物学
- 在瘤学瘤学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- E3酶MDM2是瘤抑制的关键调节者,主要通过向P53进行降解.
- 调控不当的MDM2活动有助于瘤的生长和进展.
- 了解MDM2的新型调节剂对于开发癌症疗法至关重要.
研究的目的:
- 确定和描述影响其E3酶活性的MDM2的新型相互作用伙伴.
- 阐明已识别的lncRNA,NRON在瘤形成和进展中的作用.
- 研究癌症患者NRON表达的临床意义.
主要方法:
- 同免疫沉和RNA结合测试以确定NRON作为MDM2相互作用的 lncRNA.
- 生物化学试验以确定NRON对MDM2/MDMX二分化和E3酶活性的影响.
- 在体外和体内实验 (细胞培养,异种移植模型) 来评估NRON敲击和过度表达对瘤生长的影响.
- 在临床乳腺癌患者队列中分析NRON表达.
主要成果:
- 确定NRON是一种与MDM2和MDMX结合的lncRNA,促进它们的异质二聚化,并增强MDM2的E3酶活性.
- NRON针对多种瘤抑制剂,包括P53,RB1和NFAT1,进行降解.
- NRON knockdown抑制了瘤细胞的生长,而其过度表达促进了瘤转化和瘤形成.
- 高NRON表达与乳腺癌患者的不良临床结果显著相关.
结论:
- NRON通过增强MDM2结合酶对多种瘤抑制剂的活性,充当关键的瘤性lncRNA.
- NRON通过P53依赖和独立的途径驱动上皮细胞的恶性转化.
- NRON代表了乳腺癌和潜在的其他恶性瘤的潜在治疗标和预后生物标志物.
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