ACTA1 and neoplasm: In hepatic tissues from a rat model of fibrosis, immunohistochemistry and immunoblotting were performed to detect the expression levels of α-SMA and CD147 Tumor-conditioned medium and CD147 promoted cell proliferation, activated LX-2 cells, increased the expression levels of α-SMA, collagen I and tissue inhibitor of metalloproteinase-1 (TIMP-1), and increased the secretion of matrix metalloproteinase (MMP)-2.