He et al. (He et al., 2015) found that Tan IIA reduces the expression levels of tumor necrosis factor-β (TNF-β), IL-1β, and IL-6 in the bronchoalveolar lavage fluid (BALF) of BLM-induced rats and also inhibits the expression of inducible nitric oxide synthase (iNOS) in lung tissue, thus reducing NO production and alleviating the inflammatory response in pulmonary fibrosis. The gene discussed is NOS2; the disease is pulmonary fibrosis.