【摘要】 目的研究知母总皂苷(total timosaponin,TT)的抗抑郁作用及其机制。方法采用小鼠强迫游泳实验,获得性无助实验,慢性温和应激模型,育亨宾毒性增强实验以及5-羟色胺酸诱导甩头实验等多种动物模型考察TT的抗实验性抑郁作用及其可能的机制。结果在小鼠强迫游泳实验中,TT(25,50mg·kg-1,qd×14d)可明显缩短小鼠的不动时间,且对自主活动无明显影响;TT(12.5,25,50mg·kg-1,qd×14d)可显著减少获得性无助小鼠的逃避错误次数;TT(25,50mg·kg-1,qd×21d)可显著增加慢性温和应激模型动物的活动次数以及蔗糖水消耗量;TT(50mg·kg-1,qd×14d)可提高育亨宾给药后4h的小鼠死亡率;并且显著增加5-羟色胺酸诱导小鼠的甩头次数。结论TT在多种抑郁模型上具有一定的抗抑郁作用,可能与增强去甲肾上腺素能及5-羟色胺能神经系统有关。更多还原

【Abstract】 Objective To study the antidepressant effect of total timosaponin(TT)and its mechanism.Methods The antidepressant effect of TT was examined by mice forced swimming test(FST),learned helplessness(LH)experiment,chronic mild stress(CMS)model,yohimbine induced lethality test and 5-HTP induced head-twitches test.Results TT(25 or 50 mg·kg-1,ig,qd×14 d)markedly shortened the immobility time in the FST,but didn’t affect the autonomic activity.TT(12.5,25 or 50 mg·kg-1,ig,qd×14 d)significantly decreased the number of escape deficits in the LH mice.TT(25 or 50 mg·kg-1,ig,qd×21 d)markedly enhanced the locomotor activity and increased consumption of sucrose solution in CMS mice.TT(50 mg·kg-1,ig,qd×14 d)enhanced the mortality of mice after administration of yohimbine for 4 h,and distinctly increased the head-twitch number in the 5-HTP induced head-twitches test.Conclusion TT has antidepressant effects in various depression mouse models.Its mechanism may be related to the reinforcement of NE and 5-HT nerves system.更多还原