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. 2021 Jul 15;131(14):e147834.
doi: 10.1172/JCI147834.

Rare loss-of-function variants in type I IFN immunity genes are not associated with severe COVID-19

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Rare loss-of-function variants in type I IFN immunity genes are not associated with severe COVID-19

Gundula Povysil et al. J Clin Invest. .

Abstract

A recent report found that rare predicted loss-of-function (pLOF) variants across 13 candidate genes in TLR3- and IRF7-dependent type I IFN pathways explain up to 3.5% of severe COVID-19 cases. We performed whole-exome or whole-genome sequencing of 1,864 COVID-19 cases (713 with severe and 1,151 with mild disease) and 15,033 ancestry-matched population controls across 4 independent COVID-19 biobanks. We tested whether rare pLOF variants in these 13 genes were associated with severe COVID-19. We identified only 1 rare pLOF mutation across these genes among 713 cases with severe COVID-19 and observed no enrichment of pLOFs in severe cases compared to population controls or mild COVID-19 cases. We found no evidence of association of rare LOF variants in the 13 candidate genes with severe COVID-19 outcomes.

Keywords: Genetic variation; Genetics; Infectious disease.

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Conflict of interest statement

Conflict of interest: The authors have declared that no conflict of interest exists.

Figures

Figure 1
Figure 1. Power curves for a gene set–based collapsing test.
Power calculations for the Columbia COVID-19 Biobank cohort of 480 severe cases and 9,589 population controls were performed using the samplesizeCMH R package for a dominant model at α = 0.05 and a range of odds ratios. Results are shown for the pLOF model and the model including pLOF and missense variants. Because power is influenced by the carrier frequency, we have adequate power to detect effect sizes as small as 1.5 for the model including missense variants compared with 5.5 for the pLOF-only model.

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