TGFB1 and pulmonary fibrosis: A study demonstrated that salvianolic acid B inhibited not only lipopolysaccharide (LPS)-induced inflammation in THP-1 human acute monocytic leukemia cells (downregulated mRNA and protein expression of IL-1β and TNF-α) but also TGF-β1-induced proliferation of lung fibrosis model MRC-5 cells (decreased expression of alpha-smooth muscle actin (α-SMA) and collagen 1α1) [51].