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百事乐胶囊对慢性应激抑郁大鼠海马磷脂酰肌醇—3激酶信号通路相关因子的影响

2017-08-10孟盼杜青张秀丽柳卓向韵刘林王宇红

中国中医药信息杂志 2017年8期
关键词:神经递质海马实验

孟盼 杜青 张秀丽 柳卓 向韵 刘林 王宇红

摘要:目的 观察百事乐胶囊对慢性轻度不可预见性应激(CUMS)大鼠海马磷脂酰肌醇-3激酶(PI3K)信号通路关键因子表达的影响,探讨其抗抑郁的作用机制。方法 将SD大鼠随机分为空白组、模型组、氟西汀组和百事乐胶囊高、中、低剂量组,每组10只。采用CUMS加孤养的方式建立抑郁模型,造模同时灌胃给药,连续21 d。采用新奇摄食实验和Open-field实验评价行为学变化,ELISA检测血清单胺神经递质,免疫荧光和Western blot检测大鼠海马PI3K、蛋白激酶B(AKT)、血清糖皮质激素调节蛋白激酶1(SGK1)表达。结果 与空白组比较,模型组大鼠摄食潜伏期显著延长,水平和垂直活动次数明显减少(P<0.01),血清单胺神经递质含量下降(P<0.01),海马PI3K、AKT表达显著降低且SGK1表达显著升高(P<0.05,P<0.01);与模型组比较,百事乐胶囊高、中剂量组大鼠摄食潜伏期显著缩短(P<0.05),水平和垂直活动次数显著增加(P<0.01),血清单胺神经递质含量显著升高(P<0.05,P<0.01),海马PI3K、AKT显著增加且SGK1表达显著降低(P<0.05,P<0.01)。结论 百事乐胶囊可通过缓解模型大鼠抑郁样行为,调控海马PI3K信号通路关键因子,发挥其抗抑郁的功效。

关键词:百事乐胶囊;抑郁症;海马;磷脂酰肌醇-3激酶;蛋白激酶B;血清糖皮质激素调节蛋白激酶1;单胺神经递质;大鼠

DOI:10.3969/j.issn.1005-5304.2017.08.010

中图分类号:R285.5 文献标识码:A 文章编号:1005-5304(2017)08-0041-05

Effects of Baishile Capsules on Hippocampal PI3K Signaling Pathway in Chronic Mild Unpredictable Stress Rats MENG Pan1, DU Qing1, ZHANG Xiu-li1, LIU Zhuo1, XIANG Yun1, LIU Lin2, WANG Yu-hong1,2 (1. Training Bases of Hunan Key Laboratory of Chinese Materia Medica Powder and Innovative Drugs Established by Provincial and Ministry, Changsha 410208, China; 2. First Hospital of Hunan University of Chinese Medicine, Changsha 410007, China)

Abstract: Objective To observe the effects of Baishile Capsules on the hippocampal PI3K signaling pathway in chronic mild unpredictable stress (CUMS) rats; To discuss its mechanism of action for anti-depression. Methods SD rats were randomly divided into 6 groups, control group, model group, fluoxetine group, Baishile Capsules high-, medium- and low-dose groups, with 10 rats in each group. The cums depression model was established, and gavage for medication was conducted at the same time for 21 days in a row. The behavioral changes of rats in each group were detected by the novel feeding experiment and Open-field experiment; monoamine neurotransmitter in serum were detected by ELISA; the expressions of PI3K, AKT and SGK1 in rat hippocampus were detected by immunofluorescence and Western blot test. Results Compared with the control group, feeding latency of rats in model

基金項目:国家自然科学基金青年基金(81403387);湖南省教育厅一般项目(14C0862);中医内科学省部共建教育部重点实验室开放基金(ZYNK201503);湖南中医药大学校级青年基金(99820001-147)

通讯作者:王宇红,E-mail:wyh107@126.com

group was significantly prolonged (P<0.01), horizontal and vertical activities were significantly reduced (P<0.01); the content of serum monoamine neurotransmitter decreased (P<0.01); the expressions of PI3K and AKT in hippocampus decreased, while the expression of SGK1 increased (P<0.01, P<0.05). Compared with the model group, Baishile Capsule high- and medium-dose groups can significantly shorten the incubation period of feeding rats (P<0.05), and increase the number of horizontal and vertical activities (P<0.01); the 5-HT and NE levels in serum were significantly elevated (P<0.05, P<0.01); the expressions of PI3K, AKT in hippocampal increased; the expression of SGK1 decreased (P<0.05, P<0.01). Conclusion Baishile Capsules can alleviate the depression like behavior in rat models, and regulate key factors of hippocampal PI3K signaling pathway, so as to exert antidepressant effects.

Key words: Baishile Capsules; depression; hippocampus; PI3K; AKT; SGK1; rats

抑郁症是一种以思维迟缓、意志活动减退和认知功能损伤等为主要特征的精神障碍性疾病,具有高患病率、复发率及自杀率,已成为威胁人类身心健康的杀手。抑郁症的发病机制复杂,涉及单胺递质系统功能和下丘脑-垂体-肾上腺轴功能紊乱等多种假说,但目前公认的假说都以海马作为其发病的靶部位。磷脂酰肌醇-3激酶(phosphatidylinositol 3-kinase,PI3K)信号通路与抑郁症的发生和发展密切相关,其下游信号主要分为依赖于蛋白激酶B(protein kinase B,AKT)的和非依赖于AKT的,可参与调节细胞的生长、发育、分化和存活。……

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