脑益嗪抗运动病时大鼠血浆PG和小脑Na^＋—K^＋—ATPase图？…

为探讨脑益嗪抗运动病作用机理，采用放射免疫方法和计算机图像分析系统，对运动病组和脑佃嗪药物预防组大鼠血浆ＴＸＢ２，６－Ｋｅｔｏ－ＰＧＦ１α和小脑毛细血管内皮＾＋－Ｋ＾＋－ＡＴＰａｓｅ进行定量测量和分析研究。结果表明ＣＰＧ大鼠血浆ＴＸＢ２和６－Ｋｅｔｏ－ＰＧＦ１α显著低于ＭＳＧ，而小脑毛细血管内皮细胞Ｎａ＾＋－Ｋ＾＋－ＡＴＰａｓｅ活性则明显高于。

Image and quantity analysis of prostaglandin in rats' blood plasma and Na(+)-K(+)-ATPase in their cerebellum during the prevention of motion sickness by cinnarizine]

To study the mechanism of cinnarizine in preventing motion sickness, TXB2, 6-Keto-PGF1 alpha in rats' blood plasma and Na(+)-K(+)-ATPase activity in the endothelial cells of their cerebellar capillary were measured and analysed by a radioactive immunity analyser and a computer image system. The results showed that TXB2 and 6-Keto-PGF1 alpha in rats' blood plasma in the cinnarizine preventing group (CPG) decreased remarkably, compared with those in the motion sickness group(MSG) (p < 0.05). The activity of Na(+)-K(+)-ATPase in the endothelial cells of rats' cerebellar capillary in CPG was higher than that in MSG (p < 0.01). The authors suggest that the lower concentration of TXB2 and 6-Keto-PGF1 alpha in rats' blood plasma in CPG is closely related to cinnarizine which prevents Ca2+ from entering into the platelets and into the endothelial cells of blood vessels. The higher activity of Na(+)-K(+)-ATPase in the cerebellum may be caused by cinnarizene which dilates the blood vessels in the brain, increases the blood flow therein, and hinders Ca2+ from getting into the cerebellum cells. These change are believed to be the important mechanism of how cinnarizine prevents motion sickness.