KRT18 and cancer: Immunophenotyping of the hLC-MSCs was performed based on the immunofluorescent labeling of various molecules, including E-cadherin (a marker of epithelial cells), N-cadherin and vimentin (markers of mesenchymal cells), α-smooth muscle actin (α-SMA) (a fibroblast marker), and cytokeratin 18 (CK18) (a malignant tumor marker).