TNF受体1基因风险反映了多发性硬化症中抗TNF治疗的结果
Adam P Gregory1, Calliope A Dendrou2, Kathrine E Attfield2
1MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK.
Nature
|July 18, 2012
概括
全基因组关联研究确定了一个与多发性硬化症 (MS) 相关的遗传变异,rs1800693. 这种TNFRSF1A基因的变异产生了瘤亡因子受体1 (TNFR1) 的可溶性形式,模仿其他自身免疫性疾病中使用的TNF阻断药物.
科学领域:
- 遗传学 是一个遗传学.
- 免疫学 免疫学 免疫学
- 药理学 药理学是指药理学的学科.
背景情况:
- 全基因组关联研究 (GWAS) 识别与疾病相关的遗传变异,但确定因果关系和临床相关性仍然具有挑战性.
- 在TNFRSF1A基因 (编码瘤亡因子受体1,TNFR1) 中的一种特定的单核酸多态 (SNP),rs1800693,与多发性硬化症 (MS) 相关,但与其他自身免疫性疾病无关.
研究的目的:
- 为了确定与MS相关的TNFRSF1A区域的因果遗传变异.
- 阐明MS相关变异的功能作用及其与瘤亡因子 (TNF) 信号和治疗干预的关系.
主要方法:
- 对MS GWAS数据的分析与1000个基因组项目的数据相结合,以确定因果SNP.
- 功能性研究调查MS风险等位基因对TNFR1表达和TNF阻断的影响.
- 在不同自身免疫性疾病中比较临床结果与TNF阻断药物.
主要成果:
- 遗传分析强烈地表明rs1800693是MSTNFRSF1A区域的因果变异.
- 多发性硬化症风险等位基因导致可溶性TNFR1的表达,抑制TNF.
- 临床数据显示,TNF阻断药物会加剧MS,但在缺乏 rs1800693关联的自身免疫疾病中有效,反映了变体的影响.
结论:
- 与MS相关的TNFRSF1A变体rs1800693在功能上模仿TNF阻断药物.
- 将GWAS与自身免疫性疾病进行比较,并调查变体的功能后果,可以为临床实践和药物开发提供信息.
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