银杏叶提取物对新生鼠缺血缺氧性脑损伤NSE S-100 mRNA表达的影响

目的　研究银杏叶提取物 (GbE)对新生鼠缺血缺氧性脑损伤 (HIBD)后脑组织神经元特异性烯醇化酶 (NSE)、S 10 0蛋白 (S 10 0 )mRNA表达的影响 ,以探讨GbE抗脑缺血缺氧的药理作用机制。方法　 90只 7dSD大鼠随机分成 3组 ,建立HIBD模型后 ,用RT PCR技术观察脑组织NSE、S 10 0mRNA的动态变化及GbE对其表达的影响。结果　脑组织NSEmRNA的表达在HIBD后 2 4h达高峰 ,脑组织S 10 0mRNA的表达在HIBD后 48h达高峰 ,高于假手术对照组 (P <0 0 1)。以后逐渐下降 ,至 96h仍未降至正常。腹腔注射GbE 2 4、48、72h能增加脑组织NSE、S 10 0mRNA表达的量 (P <0 0 1)。结论　GbE通过增加脑组织NSE、S 10 0mRNA的表达改变能量代谢及细胞内Ca2 + 浓度从而抗脑缺血缺氧

Effects of ginkgo biloba extract on expressions of NSE S-100 mRNA in newborn rat brain with hypoxic-ischemic brain damage

ALM To study the effects of ginkgo biloba extract (GbE) on expressions of neuron specific enolase (NSE) and S 100 protein(S 100) mRNA in newborn rat brain after hypoxic ischemic brain damage (HIBD) and the mechanism of GbE against HIBD. METHODS The dynamic changes of expressions of NSE S 100 mRNA in brain tissue and effects of GbE were studied using 7 d SD rat hypoxic ischemic brain damage model and RT PCR techniques. RESULTS The peak expressions of mRNA for NSE and S 100 occurred 24 and 48 hours after HIBD respectively, and their expressions decreased gradually. The expressions of mRNA for NSE S 100 in 24, 48, 72 hours were increased after treatment with GbE ( P< 0 01). CONCLUSION GbE can enhance the expressions of mRNA for NSE S 100 in brain tissue. This maybe one of the mechanisms of GbE against HIBD.