北京体育大学学报
北京體育大學學報
북경체육대학학보
Journal of Beijing University of Physical Education
2014年
5期
57~61
,共null页
运动 帕金森病 大鼠 纹状体 神经元 电活动
運動 帕金森病 大鼠 紋狀體 神經元 電活動
운동 파금삼병 대서 문상체 신경원 전활동
exercise ; parkinson' s disease ; rat; striatum; neuron ; electrical activity
目的:观察运动对帕金森病(PD)模型大鼠纹状体(STR)神经元自发放电活动的影响,揭示运动防治PD的神经电生理机制。方法:清洁级sD大鼠44只分为4组:假手术组(Contr01)、假手术运动组(Con-trol+Ex)、PD组(PD)和PD运动组(PD+Ex)。在大鼠内侧前脑束注射6-羟基多巴(6-OHDA)建立右侧PD大鼠模型。运动组术后24 h开始进行跑台训练,11 m/min,30 min/day,5 d/周,共4周。大鼠在造模后第1周、第2周和第4周颈部皮下注射阿朴吗啡(APO)进行旋转行为学测试,记录30 min的旋转次数。采用玻璃微电极胞外记录技术,在体观察各组大鼠STR神经元自发放电活动的变化。结果:APO诱导的旋转行为能力检测,4周后PD组净旋转次数为(282.8 ±32)r/30 min,PD+Ex组为(226.7±16.2)r/30min,PD+Ex组较PD组显著减少(P〈0.01)。PD组大鼠神经元自发放电频率较Control组显著升高(P〈0.01),爆发式放电神经元比例显著增多(P〈0.01)。PD+Ex组大鼠较PD组放电频率显著降低(P〈0.05),爆发式放电神经元比例显著减少(P〈0.05)。结论:早期运动干预能降低PD模型大鼠STR神经元高频放电和爆发式放电神经元比例,抑制STR神经元的过度兴奋,改善PD模型大鼠行为能力。推测:运动引起PD模型大鼠STR神经元兴奋性改变的机制可能与运动神经保护作用降低了6-OHDA对多巴胺(DA)能神经元的毒性损伤以及运动神经可塑性机制调节了皮层一纹状体Glu通路的突触传递有关。
目的:觀察運動對帕金森病(PD)模型大鼠紋狀體(STR)神經元自髮放電活動的影響,揭示運動防治PD的神經電生理機製。方法:清潔級sD大鼠44隻分為4組:假手術組(Contr01)、假手術運動組(Con-trol+Ex)、PD組(PD)和PD運動組(PD+Ex)。在大鼠內側前腦束註射6-羥基多巴(6-OHDA)建立右側PD大鼠模型。運動組術後24 h開始進行跑檯訓練,11 m/min,30 min/day,5 d/週,共4週。大鼠在造模後第1週、第2週和第4週頸部皮下註射阿樸嗎啡(APO)進行鏇轉行為學測試,記錄30 min的鏇轉次數。採用玻璃微電極胞外記錄技術,在體觀察各組大鼠STR神經元自髮放電活動的變化。結果:APO誘導的鏇轉行為能力檢測,4週後PD組淨鏇轉次數為(282.8 ±32)r/30 min,PD+Ex組為(226.7±16.2)r/30min,PD+Ex組較PD組顯著減少(P〈0.01)。PD組大鼠神經元自髮放電頻率較Control組顯著升高(P〈0.01),爆髮式放電神經元比例顯著增多(P〈0.01)。PD+Ex組大鼠較PD組放電頻率顯著降低(P〈0.05),爆髮式放電神經元比例顯著減少(P〈0.05)。結論:早期運動榦預能降低PD模型大鼠STR神經元高頻放電和爆髮式放電神經元比例,抑製STR神經元的過度興奮,改善PD模型大鼠行為能力。推測:運動引起PD模型大鼠STR神經元興奮性改變的機製可能與運動神經保護作用降低瞭6-OHDA對多巴胺(DA)能神經元的毒性損傷以及運動神經可塑性機製調節瞭皮層一紋狀體Glu通路的突觸傳遞有關。
목적:관찰운동대파금삼병(PD)모형대서문상체(STR)신경원자발방전활동적영향,게시운동방치PD적신경전생리궤제。방법:청길급sD대서44지분위4조:가수술조(Contr01)、가수술운동조(Con-trol+Ex)、PD조(PD)화PD운동조(PD+Ex)。재대서내측전뇌속주사6-간기다파(6-OHDA)건립우측PD대서모형。운동조술후24 h개시진행포태훈련,11 m/min,30 min/day,5 d/주,공4주。대서재조모후제1주、제2주화제4주경부피하주사아박마배(APO)진행선전행위학측시,기록30 min적선전차수。채용파리미전겁포외기록기술,재체관찰각조대서STR신경원자발방전활동적변화。결과:APO유도적선전행위능력검측,4주후PD조정선전차수위(282.8 ±32)r/30 min,PD+Ex조위(226.7±16.2)r/30min,PD+Ex조교PD조현저감소(P〈0.01)。PD조대서신경원자발방전빈솔교Control조현저승고(P〈0.01),폭발식방전신경원비례현저증다(P〈0.01)。PD+Ex조대서교PD조방전빈솔현저강저(P〈0.05),폭발식방전신경원비례현저감소(P〈0.05)。결론:조기운동간예능강저PD모형대서STR신경원고빈방전화폭발식방전신경원비례,억제STR신경원적과도흥강,개선PD모형대서행위능력。추측:운동인기PD모형대서STR신경원흥강성개변적궤제가능여운동신경보호작용강저료6-OHDA대다파알(DA)능신경원적독성손상이급운동신경가소성궤제조절료피층일문상체Glu통로적돌촉전체유관。
Objective : This study observed the effects of exercise on striatum ' s neuronal activity in rats with parkin son's disease, and aimed to detect the mechanism of preventing and curing parkinson' s disease by exercise. Methods: Fortyfour adult male SD rats were randomly divided into four groups: shamoperation group (Control), shamoperation with exercise group (Control + Ex), parkinson' s disease group (PD) and parkin son' s disease group with exercise( PD + Ex). 6 OHDA was injected into the right medial forebrain bundle of rats to establish model of parkinson' s disease. Rats in exercise group were participated in treadmill exercise 24h after 6 OHDA injection ( 11 m/min, 30 min/day, 5 days/week, and 4 weeks in total). Behavior evaluation was measured by rotational test induced by apomorphine at the first, second, and fourth week. Striatum' s neuronal ac tivity in vivo was observed by extracellular glass microelectrode technique. Results: The number of rotations in duced by apomorphine in PD group (282. 8 ± 32 r/30 min) was higher than that in PD + Ex group (226. 7 ± 16. 2 r/30 min) after 4 weeks ( P 〈 0. 01 ). Spontaneous frequency and bursting rate of striatum' s neuronal activity in PD group were higher than those in control group ( P 〈 0.01 ), also they were higher than those in PD + Ex group ( P 〈 0. 05 ). Conclusion: Exercise can decrease the frequency and bursting rate of stratum' s neuronal activ ity in rats with parkinson' s disease, control hyperexcitability of striatum' s neuronal activity, and improve behav iors of rats with parkinson' s disease. The authors speculate that the mechanism of changing striatum' s neuronalactivity by exercise may be related to the decreased damage of dopaminergic neurons induced by 6 OHDA after exercise, and motor nerve plasticity regulates modulate synaptic transmission in cortexstriatum Glu pathway.