13Apr 2023
The IFN Connection: How Immune System Genes Impact COVID-19 Severity

The IFN Connection: How Immune System Genes Impact COVID-19 Severity

A study was conducted to identify the determinants of life-threatening COVID-19 in unvaccinated patients. The study found that impaired type I interferon (IFN) activity due to genetic mutations or autoantibodies accounted for 15-20% of cases, and the remaining 80% of cases were unknown. The study analyzed the genome-wide rare variant burden in 3269 unvaccinated patients with life-threatening COVID-19 and identified TLR7 gene as the most significant gene with at-risk variants, particularly with recessive inheritance. The study also found an enrichment in rare predicted loss-of-function (pLOF) variants at 15 loci involved in TLR3-dependent type I IFN immunity, which were more common in patients under 60 years old.

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