期刊
NATURE GENETICS
卷 38, 期 5, 页码 550-555出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ng1782
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资金
- NCRR NIH HHS [M01-RR-00052] Funding Source: Medline
- NIAMS NIH HHS [AR 43727] Funding Source: Medline
Systemic lupus erythematosus (SLE) is a complex autoimmune disease(1) characterized by activation of the type I interferon (IFN) pathway(2-4). Here we convincingly replicate association of the IFN regulatory factor 5 (IRF5) rs2004640 T allele with SLE5 in four independent case-control cohorts (P = 4.4 x 10(-16)) and by family-based transmission disequilibrium test analysis (P = 0.0006). The rs2004640 T allele creates a 5' donor splice site in an alternate exon 1 of IRF5, allowing expression of several unique IRF5 isoforms. We also identify an independent cis-acting variant associated with elevated expression of IRF5 and linked to the exon 1B splice site. Haplotypes carrying the variant associated with elevated expression and lacking the exon 1B donor site do not confer risk of SLE. Thus, a common IRF5 haplotype driving elevated expression of multiple unique isoforms of IRF5 is an important genetic risk factor for SLE, establishing a causal role for type I IFN pathway genes in human autoimmunity.
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