描述常见的功能丧失基因及其在评估人口变异性和化学易感性方面的潜在有用性
bioRxiv : the preprint server for biology
|December 31, 2025
概括
这项研究引入了一种新的方法来评估常见的遗传变异如何影响个体对化学毒素的敏感性. 通过将遗传数据整合到细胞模型中,它旨在改善对脆弱人群的毒理风险评估.
科学领域:
- 毒理学和环境健康
- 遗传学和基因组学 遗传学和基因组学
- 计算生物学 计算生物学
背景情况:
- 个人对化学物质暴露的敏感性在不同人群中存在很大差异,这使得确定安全暴露值变得复杂.
- 当前的风险评估模型通常依赖于默认因素,因为缺乏特定化学物质的遗传变异性数据.
研究的目的:
- 开发一种实验方法,将常见的遗传变异纳入基于人类细胞的模型,以研究毒素易感性.
- 识别具有与毒理反应相关的常见功能丧失 (LoF) 基因的基因.
主要方法:
- 使用gnomAD v3.0数据识别了一组具有共同聚合LoF等位基因的基因组 (PopVarLoF).
- 进行了丰富分析,并询问了GWAS和PheWAS数据库,以了解PopVarLoF基因的功能相关性.
- 开发了CRISPR淘汰库,以评估HepG2/C3A细胞中PopVarLoF基因的功能基本性.
主要成果:
- 丰富分析显示,PopVarLoF基因在毒理学中存在显著的过度代表性.
- GWAS和PheWAS数据将PopVarLoF基因与与毒性反应变异性相关的代谢表型联系起来.
- 14个PopVarLoF基因的功能障碍导致HepG2/C3A细胞的显著生长缺陷,表明它们的基本性.
结论:
- PopVarLoF集为研究毒素易感性的人口变异的遗传来源提供了宝贵的资源.
- 将遗传变异性纳入基于人类细胞的毒性测定 (新方法方法) 可以提高风险评估的准确性.
- 这种方法有望为脆弱人群提供更强大的保护,并减少化学品安全评估的不确定性.
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