柴胡疏肝散对慢性应激抑郁模型大鼠行为及血浆促肾上腺皮质激素释放激素和促肾上腺皮质激素的影响

Effects of Chaihu Shugan San on behavior and plasma levels of corticotropin releasing hormone and adrenocorticotropic hormone of rats with chronic mild unpredicted stress depression

目的:探讨柴胡疏肝散对慢性应激抑郁模型大鼠行为学及血浆促肾上腺皮质激素释放激素(corticotropin re—leasing hormone,CRH)和促肾上腺皮质激素(adrenocorticotropic hormone,ACTH)浓度的影响。方法:40只雄性 SD 大鼠随机分为空白对照组、模型组、氟西汀组及柴胡疏肝散组。采用慢性轻度不可预见性应激加孤养复制大鼠抑郁模型(4周)。所有大鼠在造模第15天开始灌胃,分别灌服等体积生理盐水(空白对照组、模型组)或氟西汀(1.8 mg/kg)及柴胡疏肝散(5.9 g/kg)药液,连续2周。选用敞箱实验得分和液体消耗量等指标评价各组大鼠行为学改变,采用放射免疫法检测各组血浆 CRH 和 ACTH 浓度。结果:与空白对照组比,模型组大鼠体质量增加缓慢,敞箱实验中的水平运动、垂直运动得分、清洁动作次数显著减少,中央格停留时间显著延长,糖水消耗明显下降,纯水消耗显著增多,血浆 CRH 和 ACTH 浓度增高,差异有统计学意义(P<0.05)。柴胡疏肝散组大鼠抑郁样行为显著改善,血浆 CRH 和 ACTH 浓度较模型组显著降低,差异有统计学意义(P<0.01)。结论:慢性轻度不可预见性应激可使大鼠行为及神经内分泌发生异常改变,引起抑郁;柴胡疏肝散可调节慢性应激引起的 HPA 轴功能亢进,具有抗抑郁作用。

Objective： To investigate the effects of Chaihu Shugan San （CHSGS）, a compound traditional Chinese herbal medicine, on behavior and plasma levels of corticotropin releasing hormone （CRH） and adrenocorticotropic hormone （ACTH） of rats with chronic mild unpredicted stress depression. Methods： Forty male Sprague-Dawley rats were randomly divided into 4 groups： normal control group, untreated group, fluoxetine group and CHSGS group. Except the normal control group, rats were singly housed and exposed to an unpredicted sequence of mild stressor for continuous 4 weeks to induce depression. Since the fifteenth day, rats were intragastrically administered with equal volume agents respectively for 2 weeks [normal saline for the normal control group and the untreated group, fluoxetine （1.8 mg/kg） for the fluoxetine group and CHSGS （5.9 g/kg） for the CHSGS group]. Behavioral scores of rats were detected by open-field test and sucrose preference test, and the plasma levels of CRH and ACTH in different groups were detected by radioimmunoassay. Results： Compared with the normal control group, body weights of the rats in the untreated group were significantly decreased. Scores of crossing, rears and grooming in open-field test were reduced significantly. Pure water consumption in sucrose preference test was increased significantly. The levels of plasma CRH and ACTH were significantly increased. The depressive behaviors of the rats were improved significantly and the levels of plasma CRH and ACTH were obviously reduced in the CHSGS group. Conclusion： Chronic mild unpredicted mild stress can affect the neuroendocrine and behavior and cause depression in rats. CHSGS can regulate HPA hyperactivity of rats caused by chronic stress and has antidepressive effects.