由NUDT21损失诱导的MORC2的替代多基化重编程促进了KIRC的致癌性
Yuqin Tan1, Tong Zheng1, Zijun Su2
1Department of Kidney Transplantation, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China.
JCI insight
|September 22, 2023
概括
替代多基化 (APA) 重编程通过缩短MORC2mRNA驱动癌,促进瘤生长. 用一种反感性寡核酸 (ASO) 恢复NUDT21表达,显示出抗瘤效应.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 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:
- 替代多氨基化 (APA) 调节基因表达和3'未翻译区域 (3'UTR) 长度.
- APA重编程在脏清细胞癌 (KIRC) 中很普遍,但其功能作用尚不清楚.
- 染色体修饰剂越来越多地与癌症的发展有关.
研究的目的:
- 研究APA重编程在KIRC病变发生中的作用.
- 为了确定关键的基因和参与APA驱动的KIRC的调节途径.
- 探索针对已识别的APA监管轴的治疗策略.
主要方法:
- 在KIRC患者样本中分析APA模式.
- 使用生物信息学识别具有APA重编程的基因.
- 在KIRC细胞系和动物模型中对MORC2和NUDT21功能的实验验证.
- 开发和测试一种反感性寡核酸 (ASO) 疗法.
主要成果:
- 在KIRC中,MORC2表现出致癌潜力,其3'UTR缩短稳定了MORC2mRNA.
- MORC2通过DNA甲基化对瘤抑制剂DAPK1进行下调,从而招募DNMT3A.
- 由于DNMT3B介导的甲基化,APA调节器NUDT21的损失导致MORC2 3'UTR缩短.
- 通过降低MORC2.2的调节,NUDT21作为瘤抑制剂起作用.
- 一个针对NUDT21的ASO在体外和体内表现出抗瘤活性.
结论:
- 在KIRC中发现了一个新的DNMT3B/NUDT21/APA/MORC2/DAPK1监管轴.
- 证明了APA重编程的功能意义及其与KIRC中的DNA甲基化相互作用.
- 验证了NUDT21作为瘤抑制剂,并提出了ASO介导的NUDT21恢复作为潜在的KIRC疗法.
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