果糖二磷酸钠镁对缺血突触体游离钙浓度及一氧化氮合酶活性的影响(英文)

Effects of sodium magnesium fructose diphosphate on free calcium concentration and nitric oxide synthase activity of ischemic synaptosome

目的 研究果糖二磷酸钠镁对缺血突触体游离钙浓度及一氧化氮合酶活性的影响 ,以探讨其保护脑缺血的作用机制。方法 以相分离法制备正常大鼠脑突触体 ,氧糖剥夺培养建立缺血突触体模型 ,加入 1 3mmol·L-1SMFD ,4 0mmol·L-1 FDP与之培养 60min后 ,测定突触体内游离钙浓度和一氧化氮合酶活性。结果 1 3mmol·L-1SMFD可明显降低缺血突触体内游离钙浓度 ,降低一氧化氮合酶活性 ,其作用强于 4 0mmol·L-1 FDP。结论 SMFD保护脑缺血的作用机制可能与其阻止脑缺血后细胞内钙超载 。

Aim To study the effects of sodium magnesium fructose diphosphate (SMFD) on free calcium concentration and nitric oxide synthase activity of ischemic synaptosome, so as to explore the protective mechanisms of SMFD on cerebral ischemia. Methods The synaptosomes from normal rat brain were prepared by phase partition and cultured with oxygen glucose deprivation to establish ischemic synaptosome model. The intrasynaptosomal free calcium concentration and nitric oxide synthase activity were detected separtate...