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Serum levels of the IgA isotype switch factor TGF-beta1 are elevated in patients with COVID-19 #MMPMID33961290
Wang EY; Chen H; Sun BQ; Wang H; Qu HQ; Liu Y; Sun XZ; Qu J; Fang ZF; Tian L; Zeng YF; Huang SK; Hakonarson H; Liu ZG
FEBS Lett 2021[Jul]; 595 (13): 1819-1824 PMID33961290show ga
We previously observed enhanced immunoglobulin A (IgA) responses in severe COVID-19, which might confer damaging effects. Given the important role of IgA in immune and inflammatory responses, the aim of this study was to investigate the dynamic response of the IgA isotype switch factor TGF-beta1 in COVID-19 patients. We observed, in a total of 153 COVID-19 patients, that the serum levels of TGF-beta1 were increased significantly at the early and middle stages of COVID-19, and correlated with the levels of SARS-CoV-2-specific IgA, as well as with the APACHE II score in patients with severe disease. In view of the genetic association of the TGF-beta1 activator THBS3 with severe COVID-19 identified by the COVID-19 Host Genetics Initiative, this study suggests TGF-beta1 may play a key role in COVID-19.