非编码突变导致超强增强器重定位,导致B细胞淋巴瘤进展期间蛋白质合成失调
Rebecca J Leeman-Neill1,2, Dong Song3,4, Jonathan Bizarro1
1Department of Microbiology and Immunology, Vagelos College of Physicians and Surgeons, Columbia University, New York City, NY, USA.
Nature genetics
|December 4, 2023
概括
基因组的改变驱动淋巴瘤的进展. 调节性DNA中的非编码突变会影响基因表达和rRNA处理,导致淋巴瘤细胞的瘤变化.
科学领域:
- 基因组学就是基因组学.
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 毛囊性淋巴瘤可以转变为攻击性的高等级B细胞淋巴瘤,通常以MYC和BCL2基因重组 (双击淋巴瘤) 为特征.
- 了解推动这种转变的基因组变化对于开发向疗法至关重要.
研究的目的:
- 为了确定在卵泡淋巴瘤转化为双击淋巴瘤期间获得的编码和非编码基因组变异.
- 研究调节性DNA元素,特别是超级增强剂在淋巴瘤进展中的作用.
主要方法:
- 纵向瘤对的全基因组测序.
- 对拓相关领域和调控元素 (H3K4me3,H3K27ac) 的变化进行分析.
- 研究基因表达变化及其对细胞过程的影响.
主要成果:
- 在调节性DNA元素中发现了反复发生的基因组变异,包括影响PAX5/ZCCHC7基因对的超级增强剂.
- 在转换过程中,ZCCHC7表现出副本数增加,转位和增强器介导的上调.
- 淋巴瘤细胞由于改变的非编码5.8S核糖体RNA处理而表现出核细胞失调,由非编码突变驱动.
结论:
- 在淋巴瘤进展过程中获得的非编码突变可以显著影响基因表达和细胞功能.
- 改变的非编码RNA处理重新连接蛋白质合成,导致淋巴瘤蛋白质组中的瘤变化.
- 这些发现凸显了非编码调节元素在淋巴发育中的重要性,并表明了潜在的治疗点.
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