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囊性纤维化风险变体提供了对炎症性肠道疾病的保护
Mingrui Yu1, Qian Zhang2, Kai Yuan3
1Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA; Stanley Center for Psychiatric Research, the Broad Institute of MIT and Harvard, Cambridge, MA, USA; Analytic and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA.
囊性纤维化跨膜调节器 (CFTR) 基因中的遗传突变可以防止炎症性肠病 (IBD). 这项研究证实CFTR风险变异与IBD风险降低有关,强调需要更好的变异优先级.
科学领域:
- 遗传学 遗传学 是一个
- 胃肠病学 胃肠病学
- 人类疾病遗传学 人类疾病遗传学
背景情况:
- 囊性纤维化 (CF) 是由CFTR基因突变引起的.
- CFTR功能丧失突变对炎症性肠病 (IBD) 的潜在保护作用已被提出,但仍在争论中.
- 现有的证据是不确定的和矛盾的.
研究的目的:
- 研究CFTR基因变异与IBD风险之间的关联.
- 验证CF风险变体对IBD的保护作用.
- 评估基因负担测试中的变异优先级方法.
主要方法:
- 来自大型IBD病例控制队伍的外体序列数据 (发现:38,558例/66,945对照;复制:42,475例/192,050对照).
- 对CFTR deltaF508.8进行关联测试.
- 对CF风险变异进行基因负担测试.
- 评估变体优先级工具,如AlphaMissense. 这样的评估.
主要成果:
- 在CFTR deltaF508和IBD风险降低之间存在显著的关联 (p = 8.96E-11).
- 与IBD保护相关的CF风险变异的显著基因负担 (p = 3.9E-07).
- 证明了临床注释的CF风险变异对优先考虑遗传变异的有用性.
结论:
- 风险变体对IBD有保护作用.
- 这一发现支持CFTR功能在IBD病变发生过程中的作用.
- 强调在遗传学研究中需要改进变异优先级的方法.
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