SLC25A20 and hepatocellular carcinoma: Additionally, Ki-67 and TUNEL staining assays indicated fewer proliferating and more apoptotic cells in xenografts developed from SLC25A20 overexpression (SLC25A20) group compared with the empty vector (EV) group (Fig. 4D, E), which is consistent with the in vitro findings that SLC25A20 overexpression suppressed HCC cell proliferation but induced cell apoptosis.