摘要
目的:观察电针对慢性应激抑郁大鼠海马神经元的保护作用。方法:将SD大鼠随机分为正常组、模型组、电针组和氟西汀组,每组12只。采用慢性不可预知的温和应激方法建立抑郁症大鼠模型。电针组给予电针"百会""印堂"穴,每次20min,每日1次,共治疗21d;氟西汀组给予氟西汀3.3mg/kg灌胃治疗,每日1次,共21d。实验第1、7、14、21天检测大鼠体质量,Morris水迷宫实验观察动物行为学,HE染色检测海马的组织结构,透射电镜观察海马超微结构。结果:与正常组比较,模型组大鼠体质量显著下降(P<0.01),水迷宫实验的潜伏期和游泳总路程显著延长(P<0.01),海马神经元严重损伤,结构发生明显改变。电针治疗可以显著增加大鼠体质量(P<0.05),缩短潜伏期和游泳总路程(P<0.01),减轻海马神经元损伤。结论:电针可以改善慢性应激引起的大鼠海马神经元损伤,这可能是针刺缓解学习记忆能力的下降,治疗抑郁症的作用机制之一。
Objective To observe the effect of electroacupuncture （EA） stimulation of ＂Baihui＂ （GV 20）-＂Yintang＂ （EX-HN 3） on changes of learning-memory ability and hippocampal neuron structure in chronic stress-stimulation induced depres- sion rats. Methods Forty-eight SD rats were randomly divided into normal, model, EA and medication （Fluoxetine） groups, with 12 rats in each group. The depression model was established by chronic unpredictable mild stress stimulation （swimming in 4 ~C water, fasting, water deprivation, reversed day and night, etc）. Treatment was applied to ＂Baihui＂（GV 20） and ＂Yintang＂ （EX-HN 3） for 20 min, once every day for 21 days. For rats of the medication group, Fluoxetine （3.3 mg/kg） was given by ga- vage （p. o. ）, once daily for 21 days. The learning-memory ability was detected by Morris water maze tests. The pathological and ultrastructural changes of the hippocampal tissue and neurons were assessed by H.E. staining, light microscope and transmission electron microscopy, respectively. Results Oompared to the normal group, the rats＇ body weight on day 14 and day 21 after modeling was significantly decreased in the model group （P〈0.01）, the escape latency and total swimming distance in the 4 quadrants on day 10 and 21 were significantly increased in the model group （P〈0.01）. In comparison with the model group, the body weight on day 14 and 21 were significantly increased （P〈0.05）, and the escape latency and total swimming distance levels were significantly decreased in the EA group （P〈0.01）, suggesting an improvement of learning-memory ability. Observations of light microscope and transmission electron microscope showed that modeling induced pathological changes such as reduction in hippocampal cell layers, vague and broken cellular membrane, and ultrastructural changes of hippocampal neurons including swel- ling and reduction of mitochondria and mitochondrial crests were relived after EA and Fluoxetine treatment. Conclusi
出处
《针刺研究》
CAS
CSCD
北大核心
2014年第2期136-141,共6页
Acupuncture Research
基金
国家自然科学基金(No.81173334/H 2718)
北京市自然科学基金(No.7051003)
关键词
抑郁症
电针
学习记忆能力
海马
病理变化
超微结构
Depression
Electroacupuncture
Learning-memory ability
Hippocampus
Pathological changes
Ultrastructure
