Neutralization of IL-9 further suppressed expression of inflammatory cytokines including IL-9, IL-17A, IFN-γ, TGF-β1, IL-6, IL-4 and TNF-α in the mouse model of hepatic fibrosis, suggesting IL-9 may regulate the inflammatory responses to liver fibrosis. Here, TGFB1 is linked to Hepatic fibrosis.