CASP3 and Hepatic fibrosis: The expression levels of the proliferation and apoptosis-related hepatocyte genes (Ki-67 and caspase-3) from the frozen liver sections were compared between the control, CCl4-administered mice with liver fibrosis, and CCl4-administered mice with liver fibrosis infused with MSCs by immunofluorescence (Figs. 6D and 6E).