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在LAG3中,启动密码子变异与LAG-3表达量的降低和自身免疫性甲状腺疾病风险的增加有关
Saedis Saevarsdottir1,2,3, Kristbjörg Bjarnadottir4, Thorsteinn Markusson4,5
1deCODE genetics/Amgen, Inc., Reykjavik, Iceland. saedis.saevarsdottir@decode.is.
Nature communications
|July 9, 2024
概括
一项大型遗传研究发现了290种与自身免疫性甲状腺疾病 (AITD) 相关的变异. 一种罕见的LAG3基因变异通过改变免疫检查点蛋白质表达,显著增加了AITD风险.
科学领域:
- 遗传学 遗传学 是一个
- 免疫学 免疫学 免疫学
- 基因组学就是基因组学.
背景情况:
- 自身免疫性甲状腺疾病 (AITD) 是一种普遍存在的自身免疫性疾病.
- 全基因组关联研究 (GWAS) 已经确定了与AITD相关的遗传位置.
- 了解AITD的遗传基础对于开发向疗法至关重要.
研究的目的:
- 通过大规模GWAS元分析,识别与AITD相关的新型遗传变异.
- 通过使用多组学方法研究已识别变异的功能后果.
- 探索免疫检查点LAG-3在AITD病变发生中的作用.
主要方法:
- 对110,945个AITD病例和1,084,290个对照进行了GWAS元分析.
- 进行了多组学分析以确定候选基因.
- 研究了特定的LAG3变体 (rs781745126-T) 对mRNA和蛋白质表达的功能影响.
- 研究了rs781745126-T与AITD,白风和1型糖尿病的相关性.
主要成果:
- 在225个与AITD相关的位点确定了290个序列变异,其中包括115个新型变异.
- 发现了235个候选基因,强调了T细胞调节的作用.
- 一种罕见的LAG3 5'-UTR变体 (rs781745126-T) 显示出与AITD最强的关联 (OR=3.42).
- 这种变异减少了LAG-3的表达,并与AITD和白风的风险增加有关.
结论:
- 这项研究突出了AITD的遗传结构,并涉及T细胞调节途径.
- 已识别的LAG3变体提供了关于自身免疫性免疫检查点功能的见解.
- 这项研究表明,在识别药物标和免疫疗法的潜在安全问题时,多组学方法的实用性.
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