人类异构体的遗传调节R生物生成
Guanglong Jiang1,2, Jill L Reiter2, Chuanpeng Dong3
1Department of BioHealth Informatics, Luddy School of Informatics, Computing, and Engineering, Indiana University, Indianapolis, IN 46202, USA.
Cancers
|September 9, 2023
概括
被称为单核酸多态性 (SNP) 的遗传变异影响微RNA (miRNA) 成熟,影响异构R组成. 发现了特定的SNP-isomiR关联,在乳腺癌组织中改变了isomiR表达.
科学领域:
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
- 生物化学 生物化学
背景情况:
- 微RNAs (miRNAs) 是基因表达的关键转录后调节者.
- 异构Rs,成熟miRNA的序列变异,通过准不同的mRNA或与正规miRNA竞争来扩大调节能力.
- 了解影响异构R生成的因素对于理解miRNA介导基因调节的全谱至关重要.
研究的目的:
- 调查前体miRNA区域中cis作用单核酸多态体 (SNPs) 与由此产生的异构R组成之间的关联.
- 探索这些遗传变异对miRNA点特异性和基因调节的潜在影响.
- 为了检查乳腺癌和正常组织之间异构R表达的差异.
主要方法:
- 对前体miRNA序列的分析,以确定cis作用单核酸多态 (SNP).
- 对同位素R组合的量化,重点关注成熟miRNA的特定5'-同位素R亚型与已识别的同位素R总数的比例.
- 统计关联测试用于识别显著的SNP-isomiR对.
- 在乳腺癌瘤样本中对异构R表达水平的比较分析与相邻的正常组织.
主要成果:
- 确定了95个特定SNP与异构R组成之间的显著关联.
- SNP rs6505162显示出与hsa-miR-423-3p的5'-扩展和hsa-miR-423-5p的5'-修剪都有显著的关联.
- 与正常组织相比,乳腺癌瘤中两种相关异构酶 (hsa-miR-423-3p和hsa-miR-423-5p变体) 的表达水平显著升高.
结论:
- 前体miRNA区域中的cis作用SNP在确定异构R成熟和组成方面发挥着重要作用.
- 遗传变异可以影响miRNA异形的风景,潜在地改变转录后调节网络.
- 受遗传因素影响的特定异构Rs的异常表达可能会导致乳腺癌等疾病的发展或进展.
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