摘要
为探讨银杏叶提取物对缺氧复氧神经细胞凋亡中一氧化氮 (NO)动态表达的作用 ,对大鼠大脑皮质神经细胞原代分离培养 ,用原位末端标记法 (TUNEL)及流式细胞术检测细胞凋亡 ,用荧光分光光度法检测细胞培养上清液中亚硝酸根含量的变化。结果 :缺氧复氧致胎鼠大脑皮质神经细胞凋亡中NO含量呈双时相增高 (单纯缺氧 2h及缺氧 18h复氧 18h) ,银杏叶提取物 (EGB)对此双时相的NO升高有抑制作用 ,氨基胍 (AG)可抑制缺氧 8h复氧 18h组的NO升高 ,对缺氧 2h组的NO升高无抑制作用。提示 :NO参与了缺氧复氧过程中神经细胞凋亡 ,银杏叶提取物对缺氧复氧神经细胞凋亡有保护作用 ,其作用可能是通过抑制NO而实现的。
To explore the effect of extract ginkgo biloba (EGB) on the dynamic expression of nitric oxide (NO) in the neuron apoptosis following hypoxia/reoxygenation(H/R), cerebral neurons of fetal Wistar rats were primarily isolated and cultured. Apoptosis of cultured cerebral cortical neurons following H/R was detected with Tunel and Flow cytometry method. The dynamic changes of NO metabolite nitrite (NO 2 -) in the supernatent solution of cultured neurons were measured by fluorospectrophotometry. No content in the apoptosis of cerebral neurons of fetal Wistar rats increased at H 2R 0 and H 18 R 18 respectively to the normal control group. EGB showed an inhibition function to the increase of NO. AG inhibited the increase of NO at H 8R 18 , but showed no effect on the NO in H 2R 0 group. NO plays a role in the apoptosis of neurons following H/R, and EGB has a protective function on the apoptosis . The probable mechanism of EGB protection is its inhibition of NO.
出处
《首都医科大学学报》
CAS
2001年第3期193-198,共6页
Journal of Capital Medical University
基金
北京市科干局优秀青年培养基金