ArticlebioRxiv : the preprint server for biology2025
IL-4 and TGF-β Regulate Inflammatory cytokines and Cellular Infiltration in the Lung in Mouse-adapted SARS-CoV-2 Infection.
Article in bioRxiv : the preprint server for biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The pathology of severe COVID-19 is due to a hyperinflammatory immune response persisting after viral clearance. To understand how the immune response to SARS-CoV-2 is regulated to avoid severe COVID-19, we tested relevant immunoregulatory cytokines. TGF-β, IL-10 and IL-4 were neutralized upon infection with mouse-adapted SARS-CoV-2 (CMA3p20), a model of mild disease; and lung inflammation was quantified by histology and flow cytometry at early and late time points. Mild weight loss, and lung inflammation including consolidation and alveolar thickening were evident 3 days post-infection (dpi) and inflammation persisted to 7 dpi. Coinciding with early monocytic infiltrates, CCL2 and granulocyte-colony stimulating factor (G-CSF) were transiently produced 3 dpi, while IL-12 and CCL5 persisted to 7 dpi, modeling viral and inflammatory phases of disease. Neutralization of TGF-β, but not IL-10 or IL-4, significantly increased lung inflammatory monocytes and elevated serum but not lung IL-6. Neutralization of IL-4 prolonged weight loss and increased early perivascular infiltration without changing viral titer. Anti-IL-4 reduced expression of
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