候选病因Cis-监管变异的识别和功能性评估 底层心电图 QT 间隔 GWAS 位置 GWAS 位置
Supraja Kadagandla1,2, Lavanya Gunamalai1, Dongwon Lee3
1Institute of Molecular Medicine, McGovern Medical School, University of Texas Health Science Center at Houston (S.K., L.G., A.K.).
Circulation. Genomic and precision medicine
|May 27, 2025
概括
在全基因组关联研究中发现因果变异是很困难的. 这项研究在心脏组织中确定了候选因果 cis-regulatory 变异,其中6个通过增强剂测定得到验证,有助于解释遗传关联.
科学领域:
- 遗传学 遗传学 是一个
- 基因组学就是基因组学.
- 心血管生物学 心血管生物学
背景情况:
- 全基因组关联研究 (GWAS) 识别了许多变异,但确切确定因果关系是具有挑战性的.
- 大多数GWAS变体是非编码的,并且可能通过cis调节元件 (CREs) 影响基因表达.
- 开放的染色体区域是CREs的关键指标,指导变体识别.
研究的目的:
- 为了确定与 QT 间 GWAS 位点相关的候选因果 cis 调节变异.
- 利用开放的染色质数据,在心脏CREs中找到变异.
- 使用报告测试来功能验证候选变体.
主要方法:
- 确定了GWAS显著和相关的常见变异.
- 使用DNase I测序和ATAC-seq数据映射心脏CREs.
- 过的变体与心脏CREs重叠,以及已知的表达量化特征位置.
- 在HL1细胞中进行了露西法酶记者测试,以测试增强剂活性.
主要成果:
- 选择了1401个GWAS显著变体和3482个高链接不平衡.
- 确定了476种与心脏CREs重叠的候选因果变异.
- 243种变体也已知心脏表达量化特征位置.
- 在7种测试的变体中,有6种在增强剂活性中显示出显著的等位基因差异.
结论:
- 产生了一组因果变异的候选人,这些变异被丰富了cis-regulatory潜力.
- 这些变异预计将有助于解释在GWAS中观察到的遗传关联.
- 这项研究为调节心脏组织基因表达的特定变异提供了功能性证据.
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