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在APOL3中蛋白质截断变异增加了APOL1风险等位基因的长期病风险
David Y Zhang1,2, Michael G Levin3,4, Jeffrey T Duda5
1Department of Genetics.
JCI insight
|August 20, 2024
概括
一种新的APOL3基因变异 (p.Q58*) 显著增加慢性病 (CKD) 风险,特别是在具有APOL1风险变异的个体中. 这一发现突显了病中人口特异性遗传因素的重要性.
科学领域:
- 遗传学 是一个遗传学.
- 腎臟病學 (nephrology) 是一種醫學專業.
- 人口遗传学 人口遗传学
背景情况:
- APOL1基因的G1和G2等位基因是西非祖先个体慢性病 (CKD) 风险的主要贡献者.
- 染色体22上的APOL基因集群包括6个基因,包括APOL1和APOL3,这些基因是由基因重复事件引起的.
研究的目的:
- 通过基因组第一方法识别与CKD风险相关的新型遗传变异.
- 调查APOL1基因集群中特定人群变异的作用,超出已知的APOL1风险等位基因.
主要方法:
- 使用宾夕法尼亚大学医学院的生物银行,采用了基因组第一方法.
- 在非洲血统的参与者中,在六个APOL基因中发现了62种蛋白质改变变异,其小等位基因频率>0.1%.
- 进行了群体特定的全现象关联研究 (PheWAS).
主要成果:
- 在APOL3 (rs1108978,p.Q58*) 中的一种新型止损变异与CKD风险增加有显著的关联,独立于APOL1 G1/G2状态.
- 这种APOL3变异也与体积下降有关,并且在具有1副APOL1 G1/G2.2.的个体中显示出最高的CKD风险.
- 在退伍军人事务百万退伍军人计划和我们所有人研究计划中实现了发现的复制.
结论:
- 种群特异性变异,如已识别的APOL3 p.Q58*变异,在CKD病原发生中发挥着重要作用.
- 基因组优先策略对于发现新型疾病相关变异是有效的,即使是在研究完善的基因中,如APOL1.1.
- APOL3和APOL1变体之间的潜在表皮性相互作用表明,CKD风险的基础是复杂的遗传结构.
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