TNF and idiopathic pulmonary fibrosis: Compared with the IPF group, the levels of IL-6 and MDA were significantly decreased in the rats in the IPF + YFT and IPF + MitoQ + YFT groups (P < 0.05, Figures 3(a) and 3(f)), the levels of IL-1β were markedly decreased in the rats in the IPF + MitoQ and IPF + MitoQ + YFT groups (P < 0.05, Figure 3(b)), the levels of TNF-α were significantly decreased in the rats in the IPF + MitoQ + YFT group (P < 0.05, Figure 3(c)), and SOD and GSH-Px activities were significantly increased in the rats in the IPF + MitoQ + YFT group (P < 0.05; Figures 3(d) and 3(e)).