Mehmet Hocaoglu, Desire Casares-Marfil, Amr H Sawalha
{"title":"Genetic analysis of asymptomatic antinuclear antibody production","authors":"Mehmet Hocaoglu, Desire Casares-Marfil, Amr H Sawalha","doi":"10.1101/2024.08.29.24312782","DOIUrl":null,"url":null,"abstract":"Objective: Antinuclear antibodies (ANA) are detected in up to 14% of the population and the majority of individuals with ANA are asymptomatic. The literature on the genetic contribution to asymptomatic ANA positivity in the population is limited. In this study, we aimed to perform a multi-ancestry genome-wide association study (GWAS) of asymptomatic ANA positivity.\nMethods: Asymptomatic ANA positive and negative individuals from the All of Us Research Program were included in this study, selecting those with an ANA test by immunofluorescence and no evidence of autoimmune disease. Imputation was performed and a multi-ancestry meta-analysis including approximately 6 million single-nucleotide polymorphisms (SNPs) was conducted. Genome-wide SNP based heritability was estimated using the GCTA software. A cumulative genetic risk score for lupus was constructed using previously reported genome-wide significant loci.\nResults: 1,955 asymptomatic ANA positive and 3,634 asymptomatic ANA negative individuals were included across three genetic ancestries. The multi-ancestry meta-analysis revealed SNPs with a suggestive association (p-value < 1X10-5) across 8 different loci, but no genome-wide significant loci were identified. A gene variant upstream of HLA-DQB1 (rs17211748, P = 1.4X10-6, OR = 0.82, 95% CI 0.76-0.89) showed the most significant association. The heritability of asymptomatic ANA positivity was estimated to be 24.9%. Asymptomatic ANA positive individuals did not exhibit increased cumulative genetic risk for lupus compared to ANA negative individuals.\nConclusion: ANA production is not associated with significant genetic risk and is primarily determined by non-genetic, likely environmental, factors.","PeriodicalId":501212,"journal":{"name":"medRxiv - Rheumatology","volume":"29 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"medRxiv - Rheumatology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1101/2024.08.29.24312782","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Objective: Antinuclear antibodies (ANA) are detected in up to 14% of the population and the majority of individuals with ANA are asymptomatic. The literature on the genetic contribution to asymptomatic ANA positivity in the population is limited. In this study, we aimed to perform a multi-ancestry genome-wide association study (GWAS) of asymptomatic ANA positivity.
Methods: Asymptomatic ANA positive and negative individuals from the All of Us Research Program were included in this study, selecting those with an ANA test by immunofluorescence and no evidence of autoimmune disease. Imputation was performed and a multi-ancestry meta-analysis including approximately 6 million single-nucleotide polymorphisms (SNPs) was conducted. Genome-wide SNP based heritability was estimated using the GCTA software. A cumulative genetic risk score for lupus was constructed using previously reported genome-wide significant loci.
Results: 1,955 asymptomatic ANA positive and 3,634 asymptomatic ANA negative individuals were included across three genetic ancestries. The multi-ancestry meta-analysis revealed SNPs with a suggestive association (p-value < 1X10-5) across 8 different loci, but no genome-wide significant loci were identified. A gene variant upstream of HLA-DQB1 (rs17211748, P = 1.4X10-6, OR = 0.82, 95% CI 0.76-0.89) showed the most significant association. The heritability of asymptomatic ANA positivity was estimated to be 24.9%. Asymptomatic ANA positive individuals did not exhibit increased cumulative genetic risk for lupus compared to ANA negative individuals.
Conclusion: ANA production is not associated with significant genetic risk and is primarily determined by non-genetic, likely environmental, factors.
目的:抗核抗体(ANA)在人群中的检测率高达 14%,大多数 ANA 患者无症状。有关人群中无症状 ANA 阳性的遗传贡献的文献十分有限。在这项研究中,我们旨在对无症状 ANA 阳性进行一项多家系全基因组关联研究(GWAS):方法:本研究纳入了 "我们所有人研究计划"(All of Us Research Program)中的无症状 ANA 阳性和阴性个体,选择那些通过免疫荧光进行 ANA 检测且无自身免疫性疾病证据的个体。研究人员进行了估算,并进行了一项包括约 600 万个单核苷酸多态性(SNPs)在内的多种属荟萃分析。使用 GCTA 软件估算了基于 SNP 的全基因组遗传率。利用之前报告的全基因组重要位点构建了狼疮累积遗传风险评分:结果:共纳入了 1,955 名无症状的 ANA 阳性个体和 3,634 名无症状的 ANA 阴性个体,涉及三个遗传祖先。多宗族荟萃分析显示,8个不同位点的SNPs具有提示性关联(p值为1X10-5),但未发现全基因组重要位点。HLA-DQB1上游的一个基因变异(rs17211748,P = 1.4X10-6,OR = 0.82,95% CI 0.76-0.89)显示了最显著的相关性。无症状 ANA 阳性的遗传率估计为 24.9%。与ANA阴性者相比,无症状ANA阳性者患红斑狼疮的累积遗传风险并没有增加:结论:ANA的产生与重大遗传风险无关,主要由非遗传因素(可能是环境因素)决定。