In BLM-induced lung fibrosis and a mouse model of alveolar epithelial cell damage, exosomes secreted from MenSCs (MenSCs-Exos) have been shown to ameliorate pulmonary fibrosis by transferring miRNA Let-7 to suppress reactive oxygen species (ROS), mitochondrial DNA (mtDNA) damage, and activation of NLRP3 inflammasome [151]. This evidence concerns the gene NLRP3 and pulmonary fibrosis.