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miR-520a inhibits the mitotic entry and proliferation of HaCaT cells. The percentage of (A) BrdU positive cells and (B) mitotic cells in the NC, HaCaT, miR-520a inhibitor and miR-520a mimic groups following transfection. *P<0.05, **P<0.01 vs. the NC group. NC, negative control; miR, microRNA; BrdU, bromodeoxyuridine.
