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小剂量多巴胺对大鼠颅脑创伤后水通道蛋白4表达的影响 被引量:1

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摘要 目的观察小剂量多巴胺对大鼠颅脑创伤后水通道蛋白4(AQP4)表达的影响。方法49只成年雄性Wistar大鼠,随机分为对照组(7只)、创伤组(21只)及多巴胺干预组(21只),多巴胺干预组小剂量多巴胺5μg/(kg·min)持续给药,创伤组给予等量的生理盐水,对照组不予处理。分别予伤后0.5h、2h、6h、12h、24h、48h、72h断头取脑,采用半定量反转录聚合酶链反应(RT-PCR)检测脑组织AQP4mRNA表达及其变化规律。结果创伤组脑组织AQP4mRNA在伤后0.5h开始表达上调,2h、6h、12h依次增高,24h达到峰值后回落。多巴胺干预组AQP4mRNA在伤后0.5h表达上调,12h达到峰值,后逐渐回落。与创伤组相比,多巴胺干预组在相应时间点AQP4mRNA表达减少(P<0.05),并使AQP4mRNA峰值提前。结论小剂量多巴胺可以减少AQP4mRNA在大鼠颅脑创伤后的表达,减轻创伤后脑水肿,加快脑水肿的恢复,具有脑保护作用。
出处 《中西医结合心脑血管病杂志》 2009年第11期1319-1321,共3页 Chinese Journal of Integrative Medicine on Cardio-Cerebrovascular Disease
基金 国家自然基金资助项目(No.30600637)
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