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Characterizing the Takayasu Arteritis Genetic Risk in RPS9/LILRB3

RPS9/LILRB3 中大动脉炎遗传风险的表征

基本信息

批准号：
9308409
负责人：
Amr H Sawalha
金额：
$ 35.7万
依托单位：
UNIVERSITY OF MICHIGAN AT ANN ARBOR
依托单位国家：
美国
项目类别：
财政年份：
2017
资助国家：
美国
起止时间：
2017-05-01 至 2022-04-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/9308409
关键词：
19q13 Address Affect Age Antigen-Presenting Cells Aorta Appearance Applications Grants Architecture Arteries Arthralgia Blood Vessels Body Weight decreased Characteristics Chromatin Chromosomes Chromosomes, Human, Pair 19 Chronic Collaborations Complex Custom Data Dilatation - action Disease Disease Pathway Disease susceptibility Enhancers Ethnic Origin Etiology Fatigue Female Fever Fibrosis Gene Cluster Genes Genetic Genetic Predisposition to Disease Genetic Risk Genetic study Genomic Segment Genomics Geographic Locations Granulomatous HLA-B Antigens Human Immunoglobulins Infiltration Inflammation Inflammatory Interleukin-6 International Ischemia Leukocytes Limb structure Link Locus Control Region Macrophage Activation Molecular Conformation Myalgia Night Sweating Nucleic Acid Regulatory Sequences Organ Pathogenesis Pathogenicity Pathologic Patients Pattern Phenotype Physiologic pulse Prevalence Process Role Serum Signal Transduction Structure Susceptibility Gene Symptoms Takayasu&apos s Arteritis Transcript Uncertainty Untranslated RNA Variant Vasculitis Woman Work cohort design disorder risk epigenomics ethnic difference functional genomics genetic association genetic variant genome wide association study immunoregulation innovation killer immunoglobulin-like receptor mRNA Expression male monocyte novel receptor risk variant targeted treatment transcriptome sequencing transcriptomics

项目摘要

Abstract Takayasu arteritis is a systemic inflammatory disease of the large arteries and their major branches. The etiology and pathogenesis of Takayasu arteritis are poorly understood, however, a genetic contribution to the disease has been suggested by the established genetic association with HLA-B*52. Our recent work identified and confirmed multiple genetic susceptibility loci for Takayasu arteritis outside of the HLA region. These include a genetic risk locus on the leukocyte receptor complex (LRC) region on chromosome 19q13.4. We localized the genetic signal in this region to RPS9/LILRB3, and the causal variant(s) in this locus is tagged by the SNP rs11666543 which influences the expression levels of multiple transcripts within this region suggesting that the causal variant is located within a regulatory genetic element. Indeed, rs11666543 is located within an active enhancer region in primary monocytes, and the disease risk variant is associated with significant reduction of LILRB3 mRNA expression. LILRB3 is an inhibitory immunoregulatory receptor expressed on antigen presenting cells, and its deficiency has been linked to monocyte/macrophage activation. We propose to use innovative state-of-the-art genomic and epigenomic approaches, followed by functional studies to identify and characterize the causal genetic variants in this locus, and their functional pathogenic effect upon disease susceptibility.

摘要大动脉炎是大动脉及其主要分支的全身性炎症性疾病。这个大动脉炎的病因和发病机制目前知之甚少，然而，遗传因素对大动脉炎已建立的与人类白细胞抗原B*52的遗传关联提示了疾病的发生。我们最近的工作确定了证实了人类白细胞抗原区域外的多个遗传易感基因对大动脉炎易感。这些在染色体19q13.4上的白细胞受体复合体(LRC)区域包括一个遗传风险基因。我们将该区域的遗传信号定位为RPS9/LILRB3，并将该基因座的因果变异(S)标记为 SNP rs11666543影响该区域内多个转录本的表达水平因果变异位于受调控的遗传因素内。实际上，rs11666543位于原代单核细胞中的活性增强子区域，并且疾病风险变量与显著相关降低LILRB3mRNA的表达。LILRB3是一种抑制性免疫调节受体，表达于抗原提呈细胞，其缺陷与单核/巨噬细胞的激活有关。我们建议使用创新的最先进的基因组和表观基因组学方法，然后进行功能研究鉴定和鉴定该基因座上的致病遗传变异，以及它们的致病作用。疾病易感性。