a, b Representative blots and quantification of PEG10 levels in CTR9-silenced or CTR9-overexpressing HepG2 and Huh7 cells. c Representative blots and d quantification showing that PEG10 overexpression reversed p21, p27, and MMP expression in CTR9-silenced HepG2 and Huh7 cells. e–g Colony formation and Transwell migration and invasion assays showing that PEG10 overexpression reverses the effects of CTR9 knockdown on cell proliferation, migration, and invasion. *P < 0.05, **P < 0.01