Objective To investigate the effect of baicalin and silencing Nucleophosmin(NPM) gene with small interfering RNA(siRNA) on cell proliferation and cell cycle of human skin SCC A431 cell line.Methods NPM-specific siRNA was designed and synthesized,and the small interfering RNA was transfected into A431 cells to knockdown the NPM expression.Then the A431 cells were treated with 50 mg/L baicalin.The proliferation and cell cycle were assessed by CCK8 assay and flow cytometry,respectively.Results Baicalin treatme...