人参、天麻等复方总提取物对血管性痴呆大鼠脑组织单胺递质含量的影响

背景:在血管性痴呆时,脑组织缺血、缺氧,能量消耗,神经元代谢异常,三磷酸腺苷生成减少,细胞内外离子环境的紊乱等导致突触结构破坏,可能引起单胺神经递质的释放异常。目的:观察参麻益智胶囊干预的多发性脑梗塞引起的血管性痴呆动物模型脑组织单胺递质含量的变化,分析其对血管性痴呆的影响。设计:随机对照观察。单位:辽宁省基础医学研究所病生研究室。材料:Wistar种系大鼠96只,鼠龄为8～12个月,体质量为270～500g,雄雌各半。方法:实验于2001-04/07在辽宁中医学院职业技术学院病理生理研究室完成。将实验动物分为6组,每组大鼠16只,雄雌各半。其中5组采用Wistar大鼠颈内动脉注入凝血栓子的方法,制作出多发性脑梗塞引起的血管性痴呆动物模型,造模后随机分为参麻益智胶囊3.2g/kg,1.6g/kg,0.8g/kg剂量组(参麻益智胶囊由人参、天麻等总提取物组成,每克药粉含生药2.7g,由中国中医研究院西苑医院提供。),阳性药对照组,痴呆对照组;未造模动物为正常对照组。对参麻益智胶囊各剂量组分别施以相应剂量的参麻益智胶囊灌胃;阳性药对照组应用喜得镇甲磺酸双氢麦角毒碱片灌胃,剂量为lmg/kg;痴呆对照组和正常对照组应用同等剂量的生理盐水灌胃。各组动物在造模后l周开始给药,1次/d,连续给药6周。应用高效液相色谱法测定单胺类神经递质含量。主要观察指标:测定各组大鼠脑组织单胺类神经递质去甲肾上腺素、肾上腺素、多巴胺、吲哚乙酸、高香草酸和5-羟色胺的含量,并进行组间对比。结果:实验动物由于自身体质和环境改变等原因死亡9只,最后进入结果分析的实验动物为87只。痴呆对照组大鼠脑组织内去甲肾上腺素含量显著低于正常对照组大鼠(0.40±0.23),(0.70±0.14)ng/g,t=2.712,P<0.01],而参麻益智胶囊3.2,1.6g/kg剂量组大鼠脑组织去甲肾上腺素含量明显高于痴呆对照组大鼠(0.57±0.09),(0.58±0.19),(0.40±0.23)ng/g,t=2.211,P<0.05],尽管其含量仍然低于正常对照组大鼠。参麻益智胶囊0.8g/kg剂量组的去甲肾上腺素含量明显低于正常对照组(0.48±0.23)g/kg,t=2.213,P<0.05],但仍略高于痴呆对照组和阳性药对照组大鼠(0.41±0.19)ng/g]。其他神经递质间差异不明显。结论:痴呆大鼠脑组织去甲肾上腺素含量明显降低,而参麻益智胶囊具有升高痴呆大鼠脑组织去甲肾上腺素的作用。参麻益智胶囊治疗血管性痴呆可能与其提高脑组织内去甲肾上腺素的含量有关。

Effect of compound total extract ginseng and tall gastrodia tuber on content of monoamine transmitters in brain tissue of rats with vascular dementia

BACKGROUND: During vascular dementia, ischemia, hypoxia, energy expenditure, abnormal metabolism of neurons, decrease of generation of Adenosine Triphosphate and disorder of ionic environment in and out of cells are observed in brain tissue, which can cause abnormal release of monoamine transmitter.OBJECTIVE: To probe into effect of shenma yizhi capsule on content of monoamine transmitter in brain tissue of rat models with vascular dementia induced by multiple cerebral infarction.DESIGN: Randomized controlled study.SETTING: Pathological and Physiological Department o Liaoning Basic Medical Institute.MATERIALS: Totally 96 Wistar rats of either gender,aged 8-12 months, weighing 270-500 g, were selected. METHODS: The experiment was completed in the Pathological and Physiological Department of Vocational-technical College, Liaoning College of Traditional Chinese Medicine from April to July 2001. All rats of either gender were divided into 6 groups with 16 in each group. Wistar rats in 5 groups were injected with cruor embolus in internal carotid artery to make animal model of vascular dementia induced by multiple cerebral infarction.After modeling, rats were randomly divided into 3.2 g/kg, 1.6 g/kg and 0.8 g/kg shenma yizhi capsule groups (shenma yizhi capsule was extracted from ginseng and tall gastrodia tuber with 2.7 g raw materials and provide by Xiyuan Hospital of Chinese Academy of Traditional Chinese Medicine),positive control group and dementia control group. Animals without modeling were regarded as normal control group. Rats in each dosage group were perfused with the corresponding dosage of shenma yizhi capsule; rats in positive control group were perfused with 1 mg/kg hydergine dihydroergotoxine; rats in dementia control group and normal control group were perfused with the same volume of saline solution. One week after modeling, rats were medicated once a day for 6 weeks. Content of monoamine transmitter was measured with high performance liquid chromatograpy.MAIN OUTCOME MEASURES: Content of monoamine transmitter such as levarterenol, adnephrin, dopamine, indoleacetic acid, homovanillic acid and 5-serotonin.RESULTS: Nine rats died because of self-body quality and environmental change, and totally 87 animals entered the final analysis. Content of levarterenol of rats in dementia control group was lower than that in normal control group (0.40±0.23), (0.70±0.14) ng/g, t=2.712, P ＜ 0.01]; content of levarterenol of rats of 3.2 and 1.6 g/kg dosage groups was higher than that of dementia control group (0.57±0.09), (0.58±0.19), (0.40±0.23) ng/g,t=2.211, P ＜ 0.05], but was lower than that of normal control group. Content of levarterenol of rats of 0.8 g/kg dosage group was lower than that of normal control group (0.48±0.23) ng/g, t=2.213, P ＜ 0.05], but was higher than that of dementia control group and positive control group (0.41 ±0.19) ng/g]. Differences of other neurotransmitters were not significant.CONCLUSION: Content of levarterenol in brain tissue of rats of dementia control group is decreased obviously, but shenma yizhi capsule can increase content of levarterenol in brain tissue of rats. The mechanism of shenma yizhi capsule on treating vascular dementia is possibly related with increasing content of levarterenol in brain tissue.