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白香丹胶囊对肝气逆证大鼠海马GABA_B受体表达及其G蛋白偶联的离子通道和信号通路的影响

The Effect of Baixiangdan Capsule on the GABA_B Receptor Coupled to G-proteins and Ion Channels in Hippocampus of Rats with Gan-qi Invasion

【作者】 蔡洪信

【导师】 张惠云;

【作者基本信息】 山东中医药大学 , 中药学, 2012, 博士

【摘要】 目的:检测肝气逆证模型大鼠海马GABABR1、GABABR2、AC、KIR3.2、pERK1/2、ERK1/2、pCREB、CREB、BDNF、NPY表达的变化,探讨调肝方药白香丹胶囊对肝气逆证的部分中枢干预机制。方法:大鼠随机分为正常组、模型组、白香丹胶囊组(0.2g.kg-1)、巴氯芬组(0.008g.kg-1),采用“社会隔离结合居住入侵”方法制备肝气逆证大鼠模型,药物组按相应剂量灌胃给药7天,每日1次。通过糖水偏好实验、旷场实验和高架十字迷宫实验进行模型评价,采用免疫荧光技术检测各组大鼠海马GABABR1、GABABR2和AC、KIR3.2、BDNF、NPY的表达与分布,Western blot检测各组大鼠海马GABABR1、GABABR2、AC、KIR3.2、pERK1/2、ERK1/2、pCREB、CREB、BDNF、NPY蛋白表达变化。结果:居住入侵后,与正常组比较,模型组体重降低(P<0.05),糖水偏好系数降低(P<0.05),旷场实验得分增高(P<0.05),高架十字迷宫实验HD、OE+CE、RE值增高(P<0.05),OE%和OT%降低(P<0.05),海马GABABR1、GABABR2、AC、KIR3.2、pERK1/2、pCREB、BDNF、NPY表达均降低(P<0.05),ERK、CREB蛋白表达无差异(P>0.05)。与模型组比较,白香丹胶囊组体重和糖水偏好系数增高(P<0.05),巴氯芬组体重和糖水偏好系数无差异(P>0.05);与模型组比较,白香丹胶囊组和巴氯芬组旷场实验得分降低(P<0.05)、HD、OE+CE和RE值降低(P<0.05),OE%和OT%升高(P<0.05),海马GABABR1、GABABR2、AC、KIR3.2、pERK1/2、pCREB、BDNF、NPY表达均升高(P<0.05),ERK、CREB表达无差异(P>0.05)。结论:肝疏泄失常导致肝气逆证的微观机制与海马GABAB受体G蛋白偶联的离子通道功能和信号通路传导紊乱有关,改善海马GABAB受体G蛋白偶联的离子通道功能和信号通路传导紊乱可能是白香丹胶囊平肝理气的分子生物学机制之一。

【Abstract】 Objective: To detect the expression of GABABR1, GABABR2, KIR3.2, AC,pERK1/2, ERK1/2, pCREB, CREB, BDNF and NPY in hippocampus of rats withanger-out emotion, to explore the intervention mechanism of Baixiangdan Capsule teatingGan-qi invasion syndrome.Methods: The Wistar rats were divided into normal group,modle group,Baixiangdancapsule group(0.2g.kg-1) and baclofen group(0.008g.kg-1). The anger-out emotion ratmodels were established with a social isolation plus resident intruder stress.The rats wereevaluated by sucrose intake, the open field and elevated plus-maze tests.The expression ofGABABR1, GABABR2, KIR3.2, AC, pERK1/2, ERK1/2, pCREB, CREB, BDNF and NPYin hippocampus were detected by immunoflourescence and Western blot.Results: Compared with normal group, modle group had the lower sucroseintake(P<0.05), the higher total score of open field tests(P<0.05), the lower open arm entrypercent(OE%)(P<0.05), the lower open arm time percent (OT%)(P<0.05), the higherhead dipping(HD)(P<0.05) of elevated plus-maze tests and the lower expression ofGABABR1, GABABR2, KIR3.2, AC, pERK1/2, pCREB, BDNF and NPY inhippocampus(P<0.05). Compared with modle group, Baixiangdan capsule and baclofendecreased the total score of open field tests(P<0.05), decreased HD(P<0.05), increased theOE%and OT%of elevated plus-maze tests(P<0.05), increased the expression ofGABABR1, GABABR2, KIR3.2, AC, pERK1/2, pCREB, BDNF and NPY in hippocampus(P<0.05).Conclusion: The lower expression of GABABR, KIR3.2, AC, pERK1/2, pCREB,BDNF and NPY in hippocampus may have close relationship with anger-out emotion andGan-qi invasion syndrome. Increasing the expression and the function of GABABR inhippocampus maybe one of the mechanism of flatting Gan-qi or the antianxiety effect ofBaixiangdan capsule.

  • 【分类号】R285.5
  • 【下载频次】84
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