TGFB1 and asthma: As an anti-inflammatory cytokine, TGF-β deactivates macrophages, and as a pro-inflammatory cytokine, it promotes the chemotaxis of eosinophils, T lymphocytes, B lymphocytes, and neutrophils, which induces the proliferation of PF, and suppresses the apoptosis of eosinophils in asthma [2].