中文摘要：

目的：建立慢性癫痫发作SD大鼠模型并检测海马组织P2Y6受体表达改变,研究P2Y6受体-Ca2＋信号通路改变。方法：采用氯化锂和匹罗卡品腹腔注射建立SD大鼠慢性癫痫发作模型（EPI组）并检测其脑电图,以腹腔注射生理盐水SD大鼠为对照（CON组）。采用免疫组织化学、RT-PCR和Western blot检测EPI组和CON组SD大鼠海马组织P2Y6受体mRNA和蛋白质表达并比较其差异。采用Fura-2/AM检测EPI组和CON组SD大鼠新鲜海马组织细胞内Ca2＋浓度并对比其差异。结果：CON组正常SD大鼠脑电图波形主要以α波为主,并伴有低幅度的β波及少量的δ波,几乎未捕捉到棘波发放;EPI组SD大鼠的脑电图出现较为规律的棘波发放,其频率多集中于28Hz,波幅不高于200μV。EPI组慢性癫痫发作SD大鼠海马组织P2Y6受体表达、mRNA、蛋白质和细胞内Ca2＋显著高于CON组正常SD大鼠（均P〈0.05）。结论：P2Y6受体在慢性癫痫发作大鼠海马组织表达显著升高,激活下游信号传导通路导致细胞内Ca2＋水平升高,可能在慢性癫痫发作的发病机制中具有重要作用。

英文摘要：

Objective：To detect P2Y6receptor＇s expressions in rat model of temporal lobe epileptic and study its effects on intracellular Ca^2＋. Methods：Lithium-pilocarpine was used to establish the rat model of temporal lobe epileptic（EPI group）,while the rat with intraperitoneally infused with saline was as control group（CON group）.The P2Y6 expressions and intracellular Ca~（2＋）between two groups were compared.Results：The rat model of temporal lobe epileptic was successfully es-tablished with Lithium-pilocarpine method.The P2Y6 expressions and intracellular Ca^2＋ in EPI group were significantly higher than in CON group（P〈0.05）.Conclusion：P2Y6＇s expression in rat model of temporal lobe epileptic increases significantly,and promotes intracellular Ca~（2＋）,which may play an important role in epilepsy＇s pathogenesis.