目的:观察硫化氢的供体硫氢化钠(Na HS)对三磷酸腺苷(ATP)诱导的PC12细胞活力、胞内Ca2+浓度([Ca2+]i)及膜通透性的变化,探讨硫化氢神经保护作用的嘌呤信号机制。方法:将对数生长期高分化的PC12细胞,随机分为4组,分别为(1)正常对照组:常规培养,不进行ATP处理;(2)ATP组:接种细胞24 h后ATP处理;(3)Na HS+ATP组:Na HS预先孵育30 min后再用ATP处理,并且Na HS始终存在于反应体系中;(4)KN-62(P2X7受体阻断剂)+ATP组:KN-62预先孵育30 min,其余同Na HS+ATP组。MTT检测各组细胞活力,Fura-2/AM荧光染料检测各组[Ca2+]i,检测荧光染料YO-PRO-1的相对荧光单位以反映膜的通透性。结果:(1)0.3mmol/L ATP对细胞活力无影响,但1、3、5、10 mmol/L ATP则呈浓度依赖式明显降低细胞活力,200μmol/L Na HS干预可明显逆转ATP引起的细胞活力下降(P<0.05),而800μmol/L Na HS预处理则加剧ATP对PC12细胞的损伤(P<0.05)。(2)ATP处理PC12细胞会引起...
【英文摘要】
AIM: To prove the purinergic signaling mechanism of the neuroprotective action of hydrogen sulfide by observing the effects of sodium hydrosulfide( Na HS),a donor of hydrogen sulfide,on the cell viability,intracellular Ca2 +concentration( [Ca2 +]i) and the change of membrane permeability in the PC12 cells injured by adenosine triphosphate( ATP). METHODS: PC12 cells in logarithmic growth phase were randomly divided into 4 groups. In control group,the cells were cultured without ATP treatment. In ATP group,th...
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