To further test the hypothesis that miR-1224-5p suppresses PARK2 translocation then mitophagy by targeting BECN1 in silica-induced pulmonary fibrosis network, fibroblasts were also transfected with miR-1224-5p inhibitor alone or with BECN1 siRNA, and Western blot analyses were performed from mitochondrial fractions. This evidence concerns the gene BECN1 and pulmonary fibrosis.