TLR4 and pulmonary fibrosis: Crocin co-treatment notably reduced the expression of toll-like receptor 4 (TLR4) and IL-10 resulting in its anti-inflammatory effects, decreased TNF-α and transforming growth factor-β1 (TGF-β1) led to its anti-fibrotic effects, enhanced the expression of Nrf2 signaling pathway and HO-1 led to its anti-oxidant effects in the BLM-induced pulmonary fibrosis rats.