Fig. 6From: Exosomes from mesenchymal stem cells induce the conversion of hepatocytes into progenitor oval cellsHepatic differentiation of MSC-CM-induced small oval cells. a The MSC-CM-induced small oval cells were cultured in hepatic culture medium. b PAS staining and c immunostaining of cytokeratin 18 in MSC-CM-induced small oval cells at day 14 of hepatic differentiation. Scale bar: 100 μmBack to article page