By using BLM induced pulmonary fibrosis model, the same author also showed that BLM markedly augmented soluble ST2 mRNA expression following with the upregulation of Th2‐type cytokines (IL‐4 and IL‐5) and proinflammatory cytokines (IL‐1β and TNF‐α).28 This evidence concerns the gene IL4 and pulmonary fibrosis.