SB239063,新一代p38丝裂原活化蛋白激酶抑制剂在缺氧缺糖所致SHSY5Y细胞损伤中的作用

目的 探讨SB239063,新一代p38丝裂原活化蛋白激酶(p38MAPK)抑制剂在缺氧缺糖(OGD)所致SHSY5Y细胞损伤中的作用.方法 体外培养SHSY5Y神经母细胞瘤株,以OGD、SB239063(10μmol/L)处理,以MTT检测SHSY5Y细胞活性,以Western blot方法检测p38MAPK活性,应用HEt和fluo-3/AM的荧光强度测定OGD后SHSY5Y细胞超氧化物阴离子和钙离子的浓度.结果 SB239063能提高OGD后SHSY5Y细胞的活性(P<0.01),降低OGD后p38MAPK活性(P<0.05),HEt(P<0.05)和fluo-3/AM荧光强度(P<0.01).结论 SB239063通过抑制p38MAPK的激活,降低细胞内超氧阴离子的浓度,进而抑制细胞内钙超载,从而达到保护SHSY5Y细胞对抗OGD的细胞损害的作用.

Abstract：

Objective To investigate the neuroprotective effect of SB239063,the new p38 mitogen—activated protein kinase (MAPK) inhibitor on SHSY5Y neuronal cells against oxygen-glucose deprivation(OGD),and the mechanisms of the neuroprotective effect.Methods SHSY5Y neuroblastoma cells were exposed to OGD with or without SB239063 (10μmol/L),cell viability was measured by the MTF assay,activity of p38MAPK was measured by western blot,intracellular concentration of superoxide anion and calcium were evaluated via the fluorescence intensity of Het and fluo-3/AM. Resuits Compared with the OGD group.The MTT value was elevated significantly in the SB239063 group(P<0.01),the activitv of p38MAPK decreased significantly in the SB239063 group(P<0.01),the fluorescence intensity of Het(P<0.05)and fluo-3/AM(P<0.01)decreased significantly in the SB239063 group.Conclusion SB239063 protects SHSY5Y neuronal cells against OGD by inhibiting the activity of p38MAPK,then reducing the intracellular concentration of superoxide anion and calcium.

Role of SB239063 ,the new p38 mitogen-activated protein kinase inhibitor, on the cell damage of SHSY5Y neuronal cells from oxygen-glucose deprivation

Objective To investigate the neuroprotective effect of SB239063,the new p38 mitogen—activated protein kinase (MAPK) inhibitor on SHSY5Y neuronal cells against oxygen-glucose deprivation(OGD),and the mechanisms of the neuroprotective effect.Methods SHSY5Y neuroblastoma cells were exposed to OGD with or without SB239063 (10μmol/L),cell viability was measured by the MTF assay,activity of p38MAPK was measured by western blot,intracellular concentration of superoxide anion and calcium were evaluated via the fluorescence intensity of Het and fluo-3/AM. Resuits Compared with the OGD group.The MTT value was elevated significantly in the SB239063 group(P<0.01),the activitv of p38MAPK decreased significantly in the SB239063 group(P<0.01),the fluorescence intensity of Het(P<0.05)and fluo-3/AM(P<0.01)decreased significantly in the SB239063 group.Conclusion SB239063 protects SHSY5Y neuronal cells against OGD by inhibiting the activity of p38MAPK,then reducing the intracellular concentration of superoxide anion and calcium.