摘要
目的:研究百合地黄汤对失眠模型大鼠行为学及大鼠皮层、脑干和海马组织中多巴胺(DA)和5-羟色胺(5-HT)的影响,探讨百合地黄汤治疗失眠的作用机制。方法:采用腹腔注射对氯苯丙氨酸(PCPA,0.4 g·kg~(-1))复制失眠模型大鼠,将造模成功的大鼠随机分为模型组、地西泮组(0.92 mg·kg~(-1))、百合地黄汤高剂量组(28 g·kg~(-1))和百合地黄汤低剂量组(7 g·kg~(-1)),另设空白组,连续给药7天,采用旷场实验测定行为学评分,翻正反射实验评价百合地黄汤对大鼠睡眠的影响,高效液相色谱电化学检测法(HPLC-ECD)检测大鼠皮层、脑干和海马中DA和5-HT的含量。结果:百合地黄汤可以降低失眠模型大鼠的中央格停留时间、修饰次数和粪便颗粒数(P <0.05),缩短睡眠潜伏期并延长睡眠持续时间(P <0.05),大脑皮层、脑干和海马中5-HT含量明显升高(P <0.05),大鼠皮层中DA含量显著降低(P <0.05);与模型组相比,P <0.05。结论:百合地黄汤可改善失眠模型大鼠行为学和睡眠,对DA和5-HT的调节作用可能是其治疗失眠的作用机制。
Objective: To study the effects of Baihe Dihuang Decoction on the ethology of insomnia model rats and dopamine(DA) and serotonin(5-HT) in the cortex, brain stem and hippocampus of rats, so as to study the mechanism of Baihe Dihuang Decoction in the treatment of insomnia. Methods: Rats were given parachlorophenylalanine(PCPA, 0.4 g·kg~(-1))to replicate insomnia model, and were randomly divided into model group, diazepam group(0.92 mg·kg~(-1)), Baihe Dihuang Decoction high dose group(28 g·kg~(-1)) and Baihe Dihuang Decoction low dose group(7 g·kg~(-1)), and blank group.All groups were administrated continuously for 7 days, The behavior score was measured by open field test, and the sleeping of rats was evaluated by reversal reflex experiment. The contents of DA and 5-HT in the cortex, brain stem and hippocampus of rats were measured by high performance liquid chromatography with electrochemical detection method(HPLC-ECD). Results: Baihe Dihuang Decoction can reduce the time in center grid, the number of fecal particles and grooming(P < 0.05), shorten the sleep latency and prolong the duration of sleeping quality(P < 0.05), and the 5-HT content in the cortex, brain stem and hippocampus of insomnia model rats increased significantly(P < 0.05). The content of DA in rat cortex decreased significantly(P < 0.05), compared with the model group, P < 0.05. Conclusion: Baihe Dihuang Decoction can improve the ethology and sleeping quality of insomnia rats, and its regulating effect on DA and 5-HT may be the mechanism of insomnia treatment.
引文
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