MDR SKM-1/AzaC cell variant by long-term passaging with AzaC was established.
Massive overexpression of P-gp in SKM-1/AzaC cells was observed.
Downregulation of miRNA-27a in SKM-1/AzaC cells was detected.
Downregulation of P-gp by transfection of these cells with miRNA-27a was observed.