RAB27A and hepatocellular carcinoma: Rab27a knockdown prevents exosome secretion from MHCC97Hs and enhances the expression of MHCC97H mesenchymal markers (such as N-calmodulin, α-SMA, and waveform protein), reduces the expression of epithelial marker E-calmodulin, promotes EMT in HCC cells via MAPK/ERK signaling pathway, and induces migration, chemotaxis, and invasion of progenitor cells.