Abstract
Abstract The goal of the proposed research is to determine how the interferon regulatory factor 5(IRF5) lupus risk variant translates into biological risk of systemic lupus erythematosus (SLE). Genome wide association studies (GWAS) have identified IRF5 as one of the most strongly associated genes with susceptibility to SLE. Although the genetic association of IRF5 with lupus is clear, the exact mechanism by which IRF5 risk variant promotes susceptibility for lupus is still unknown. We are investigating negative regulatory factors of IRF5 activity under normal conditions, which are unable to regulate IRF5 exon 6 risk variants thereby activating type I IFNs leading to aberrant immune activation. We have characterized IRF5 exon 6 variants in pDCs using molecular and biochemical approaches, and investigated the effect of negative regulators on IRF5 exon 6 variants. This will be a significant step to gain the mechanistic understanding of aberrant production type I IFNs and immune activation in lupus.
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