The study conducted an in-depth genetic analysis of COVID-19, revealing five single nucleotide polymorphisms on chromosome 21 associated with severe cases. The minor alleles of these SNPs were found to be correlated with a reduced risk of developing severe COVID-19 and higher expression levels of MX1 in blood. These findings suggest that host genetic factors may influence the clinical presentations of COVID-19 and highlight MX1 as a potential therapeutic target.
The established risk factors of coronavirus disease 2019 (COVID-19) are advanced age, male sex, and comorbidities, but they do not fully explain the wide spectrum of disease manifestations. Genetic factors implicated in the host antiviral response provide for novel insights into its pathogenesis. We performed an in-depth genetic analysis of chromosome 21 exploiting the genome-wide association study data, including 6,406 individuals hospitalized for COVID-19 and 902,088 controls with European genetic ancestry from the COVID-19 Host Genetics Initiative. We found that five single nucleotide polymorphisms within TMPRSS2 and near MX1 gene show associations with severe COVID-19. The minor alleles of the five single nucleotide polymorphisms (SNPs) correlated with a reduced risk of developing severe COVID-19 and high level of MX1 expression in blood. Our findings demonstrate that host genetic factors can influence the different clinical presentations of COVID-19 and that MX1 could be a potential therapeutic target.EY
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