在人类肝脏样本中,UGT1A1 mRNA表达与Cis-acting遗传变异和Trans-acting转录调节剂之间的关联
Matthew J Taylor1, Joseph M Collins1, Abelardo D Montalvo1
1Department of Pharmacotherapy and Translational Research, College of Pharmacy, Center for Pharmacogenomics and Precision Medicine, University of Florida, Gainesville, FL 32610, USA.
Genes
|August 28, 2025
概括
在UDP-glucuronosyltransferase1A1 (UGT1A1) 的基因变异对药物代谢的影响不同. 这项研究揭示了影响UGT1A1表达的特定人群调节因素,这对个性化医学至关重要.
科学领域:
- 药物基因组学
- 分子生物学
- 种群遗传学
背景情况:
- UDP- 葡萄糖转移酶1A1 (UGT1A1) 是内源化合物和药物的代谢的关键.
- 基因变异,包括促进体TA重复 (UGT1A1*28/*36/*37) 和SNP rs887829,影响UGT1A1活动,但表现出跨祖先的不一致关联.
- 了解这些变化对于指导药物治疗至关重要,特别是在多样化的群体中.
研究的目的:
- 在欧洲美洲 (EA) 和非洲美洲 (AA) 肝脏样本中研究UGT1A1表达及其遗传变异之间的关系.
- 阐明特定的UGT1A1基因变异对基因表达的功能影响.
- 确定UGT1A1规范中的特定群体差异.
主要方法:
- 多重线性回归分析以将UGT1A1表达与遗传变异相关联.
- 报告者基因测试以评估UGT1A1促进体变异的转录活性.
- 来自EA (n=119) 和AA (n=138) 捐赠者的肝脏样本的分析.
主要成果:
- UGT1A1*36 (5TA) 的促进活性明显高于参考 (6TA).
- UGT1A1*28 (7TA) 和*37 (8TA) 的促进活性降低.
- SNP rs887829与UGT1A1表达的关联很可能是由于与UGT1A1*28/*37的结合不平衡,因为它对促进剂活性没有直接影响.
- 与AAs (39%) 相比,跨作用调节器协会和组合基因变异的祖先差异解释了EA中更高的UGTA1A1表达变异性.
结论:
- 在EA和AA群体之间,UGT1A1基因调节存在显著差异.
- 这些发现表明未被发现的cis和/或trans作用因子在非洲血统个体的UGT1A1表达中起作用.
- 需要进一步的研究来确定这些因素,以便在不同人群中改善药物基因组应用.
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