A highly prevalent lupus risk haplotype increases IRF7-dependent induction of IFN-α, enhancing antiviral defense and exacerbating autoimmunity.

A highly prevalent IRF7 haplotype increases IRF7 activity, boosting IFN-α production and enhancing antiviral defense while also exacerbating autoimmunity.

• Why it matters: Understanding genetic factors that influence immune responses is crucial for unraveling lupus pathogenesis and balancing antiviral protection with autoimmune risk.
• What they did: The study used genetic fine mapping, ancient DNA analysis, and CRISPR engineering in mice to examine a common IRF7 haplotype's effects on IRF7 localization, DNA binding, and interferon-α production across various biological systems.
• The result: The haplotype elevates IRF7 activity, leading to increased antiviral responses and autoantibody titers, highlighting its dual role in immune defense and autoimmune disease susceptibility.