Objective To observe the effect of esculemoside A (EsA)on the proliferation and expression of CDK2 and P27 of rats glomerular mesangial cell .Methods rGMC was cultured in vitro ,The cell growth and cell toxicity were detected by MTT assay ;rGMC proliferation was observed by Rnase/PI-Flous ;The expression of CDK2 and P27 were measured by Western blotting .Results EsA at observed dose has not apparent cytotoxicity effect on rGMC .EsA(2 .5-5 .0 mg/L) inhibited the proliferation of rGMC after 48h .EsA increased the number of the G1 phase and reduced the number of the S phase of IL-1βinduced rGMC .At the same time ,EsA inhibited the expression of CDK2 and promoted the expression of P27 of IL-1βinduced rGMC .Conclusion The GMC is one of the mainly target cell which EsA bing therapeu tical action .EsA inhibited proliferation of IL-1βinduced the GMC ,inhibited the expression of CDK2 and activated the expression of P27 may be its mechanism .

Objective To observe the influence of serum containing esculentoside A(EsA) on the proliferation of glomerular mesangial cell (GMC) and the activation of ERK1/2-AP-1 pathway of glomerular mesangial cell induced by IL-1β.Methods SD rats were gavaged by different doses of EsA(5,10,20,40 mg/kg) for getting medicated sera.The control group was set (gavage by 0.5sodium carboxymethylcellulose);the EsA medicated serum was used to treat rGMC.The control serum group was set.The influence of EsA medicated serum in each group on rGMC proliferation was detected by MTT;the rGMC was divided into the blank control group,IL-1β single action group,IL-1β+ EsA double action group,IL-1β+ U016 double action group and IL-1β+ U0126 + EsA combined action group,which were synchronized and then cultured for 48 h.Western blot was used to detectthe expression of p-ERK1/2 and AP-1 an the imaging analysis was performed.Results The EsA medicated serum(5-10 mg/kg gavage) inhibited the cellular proliferation(P＜0.05 or P＜0.01);the IL-1β group promoted the expression of p-ERK1/2 and AP-1 in rGMC(P＜ 0.05),after acting on rGMC in the IL-1β+EsA double action group,IL-1β+U0126 double action group and IL-1β+U0126+EsA combined action group,the expression of p-ERK1/2 and AP-1 was decreased(P＜0.05).Conclusion Serum containing EsA (5～10 mg/kg gavage) significantly inhibits the rGMC proliferation;EsA inhibits IL-1β induced rGMC proliferation,its action pathway on ERK1/2-AP-1 is one of mechanisms for inhibiting rGMC proliferation.