Objective To explore the effects of BK channels inhibitors on cell activity,apoptosis and cytokine secretion of mesenchymal stem cells derived from human umbilical cord Wharton's jelly(WJ-MSC).Methods The WJ-MSC were isolated and cultured by tissue adherent method.The expression of BK channels was detected by Western-blot.After treated with different concentrations of BK channels inhibitors,the activity of cells was detected by CCK-8,the apoptosis of cells was detected by Annexin-V-FITC/PI,and the expression of cytokine(IL6,IL10)was detected by Elisa.Results BK channels expression was found in WJ-MSC.BK channels inhibitors reduced cell activity,promoted cell apoptosis and secretion of cytokine(IL6),all of which have statistical significance(P<0.05).But BK channels inhibitors did not increase the secretion of IL-10.Conclusion BK channels inhibitors can inhibit the activity of WJ-MSC,promote cell apoptosis and promote the secretion of IL6.