RT-qPCR and western blot analyses (Figure 5C) suggested that compared with control mice, mRNA expression of YY1 and HSF1, and expression of miR-214 in the mice with bleomycin-induced pulmonary fibrosis were significantly increased and the expression of THY1 was notably decreased (P < 0.05). The gene discussed is YY1; the disease is pulmonary fibrosis.