Repetitive transcranial magnetic stimulation （rTMS） is a non-invasive treatment that can enhance the recovery of neurological function after stroke. Whether it can similarly promote the recovery of cognitive functio...Repetitive transcranial magnetic stimulation （rTMS） is a non-invasive treatment that can enhance the recovery of neurological function after stroke. Whether it can similarly promote the recovery of cognitive function after vascular dementia remains unknown, In this study, a rat model for vascular dementia was established by the two-vessel occlusion method. Two days after injury, 30 pulses of rTMS were ad- ministered to each cerebral hemisphere at a frequency of 0.5 Hz and a magnetic field intensity of 1,33 T. The Morris water maze test was used to evaluate learning and memory function. The Karnovsky-Roots method was performed to determine the density of cholinergic neurons in the hippocampal CA1 region. Immunohistochemical staining was used to determine the number of brain-derived neurotroph- ic factor （BDNF）-immunoreactive cells in the hippocampal CA1 region, rTMS treatment for 30 days significantly improved learning and memory function, increased acetylcholinesterase and choline acetyltransferase activity, increased the density of cholinergic neurons, and increased the number of BDNF-immunoreactive cells. These results indicate that rTMS can ameliorate learning and memory deficiencies in rats with vascular dementia, The mechanism through which this occurs might be related to the promotion of BDNF expression and subsequent restoration of cholinergic system activity in hippocampal CA 1 region.展开更多
Acupuncture can improve the cognitive state of Alzheimer＇s disease, but its mechanism is not clear. Dendritic atrophy and synaptic loss in Alzheimer＇s disease brain are positively correlated with cognitive damage. T...Acupuncture can improve the cognitive state of Alzheimer＇s disease, but its mechanism is not clear. Dendritic atrophy and synaptic loss in Alzheimer＇s disease brain are positively correlated with cognitive damage. Therefore, we speculated that the effect of acupuncture on improving cognitive function may be associated with reduced dendritic damage in the brain. Acupuncture at Qihai（CV6）, Zhongwan（CV12）, Danzhong（CV17）, bilateral Zusanli（ST36）, and bilateral Xuehai（SP10） acupoints was performed once a day（1-day rest after 6-day treatment） for 14 consecutive days. Senescence-accelerated mouse prone 8（SAMP8） mice without acupuncture and senescence-accelerated mouse resistant 1（SAMR1） mice were used as normal controls. After 14 days of treatment, spatial learning and memory ability of mice was assessed in each group using the Morris water maze. Dendritic changes of pyramidal cells in the hippocampal CA1 region were analyzed by quantitative Golgi staining. Our results showed that acupuncture shortened escape latency and lengthened retention time of the former platform quadrant in SAMP8 mice. Further, SAMP8 mice exhibited a significant increase in the number of apical and basal dendritic branches and total length of apical and basal dendrites after acupuncture. These results suggest that acupuncture improves spatial learning and memory ability of middle-aged SAMP8 mice by ameliorating dendritic structure.Acupuncture can improve the cognitive state of Alzheimer＇s disease, but its mechanism is not clear. Dendritic atrophy and synaptic loss in Alzheimer＇s disease brain are positively correlated with cognitive damage. Therefore, we speculated that the effect of acupuncture on im- proving cognitive function may be associated with reduced dendritic damage in the brain. Acupuncture at Qihai （CV6）, Zhongwan （CV 12）, Danzhong （CV17）, bilateral Zusanli （ST36）, and bilateral Xuehai （SP10） acupoints was performed once a day （1-day rest after 6-day treat- ment） for 14 展开更多
目的观察大鼠脑缺血再灌注后海马CA1区神经元Caspase-3的表达及细胞凋亡指数的动态变化。方法将大鼠随机分为假手术组、模型组。模型组又分为脑缺血再灌注后0,0.5,2,6,24,72,120 h 7个亚组。采用4-VO阻断法制备大鼠脑缺血再灌注模型,用...目的观察大鼠脑缺血再灌注后海马CA1区神经元Caspase-3的表达及细胞凋亡指数的动态变化。方法将大鼠随机分为假手术组、模型组。模型组又分为脑缺血再灌注后0,0.5,2,6,24,72,120 h 7个亚组。采用4-VO阻断法制备大鼠脑缺血再灌注模型,用免疫组织化学染色法及原位细胞凋亡检测法(TUNEL染色)分别观察大脑海马CA1区神经元Caspase-3的表达及细胞凋亡指数。结果假手术组海马CA1区神经元Caspase-3蛋白有少量表达。和假手术组相比,模型组大鼠在脑缺血再灌注后0 h、0.5 h海马CA1区神经元Caspase-3表达无明显变化(P>0.05),再灌注后2 h开始升高(P<0.05)、24 h达高峰(P<0.05),之后逐渐下降,再灌注后120 h仍高于假手术组(P<0.05)。细胞凋亡指数的变化趋势与Caspase-3的表达变化相一致。结论脑缺血再灌注可诱导凋亡相关蛋白Caspase-3的表达,进而导致细胞凋亡。细胞凋亡在脑缺血再灌流损伤中呈动态过程,是神经细胞死亡的重要形式。展开更多
目的探讨参芎化瘀胶囊对大鼠全脑缺血再灌注损伤及海马CA1区生长相关蛋白43(growth associated protein 43,GAP43)表达的影响。方法 100只成年SD雄性大鼠随机分为对照组、模型组和参芎化瘀胶囊每日1次组(中药A组),每日2次组(中药B组),每...目的探讨参芎化瘀胶囊对大鼠全脑缺血再灌注损伤及海马CA1区生长相关蛋白43(growth associated protein 43,GAP43)表达的影响。方法 100只成年SD雄性大鼠随机分为对照组、模型组和参芎化瘀胶囊每日1次组(中药A组),每日2次组(中药B组),每日3次组(中药C组),每组20只。采用改良的Pulsinelli四血管闭塞法制备全脑缺血再灌注动物模型。在1、3、7、14天4个时间点通过HE染色观察海马CA1区组织学改变,免疫组织化学法检测海马CA1区GAP43蛋白的表达同时测定行为学评分,第14天通过Western blot法检测海马CA1区GAP43蛋白质含量。结果与对照组比较,模型组各时间点GAP43蛋白表达增高(P<0.05),行为学评分升高(P<0.05),变性神经元增加,存活神经元减少(P<0.05)。与模型组比较,参芎化瘀胶囊各组GAP43蛋白表达均升高(P<0.05),其中中药C组最明显(P<0.01);行为学评分显著降低(P<0.05);变性神经元数量减少,存活神经元数量增加(P<0.05);14天存活神经元数明显增多,其中以中药C组存活神经元数量最多、GAP43蛋白质含量最高,与中药A、B两组比较,差异有统计学意义(P<0.01)。结论参芎化瘀胶囊对大鼠全脑缺血再灌注损伤具有保护作用,其机制可能与升高GAP43的表达有关。展开更多
基金supported by a grant from the Major Project of Educational Commission of Hubei Province of China,No.D20152101
文摘Repetitive transcranial magnetic stimulation （rTMS） is a non-invasive treatment that can enhance the recovery of neurological function after stroke. Whether it can similarly promote the recovery of cognitive function after vascular dementia remains unknown, In this study, a rat model for vascular dementia was established by the two-vessel occlusion method. Two days after injury, 30 pulses of rTMS were ad- ministered to each cerebral hemisphere at a frequency of 0.5 Hz and a magnetic field intensity of 1,33 T. The Morris water maze test was used to evaluate learning and memory function. The Karnovsky-Roots method was performed to determine the density of cholinergic neurons in the hippocampal CA1 region. Immunohistochemical staining was used to determine the number of brain-derived neurotroph- ic factor （BDNF）-immunoreactive cells in the hippocampal CA1 region, rTMS treatment for 30 days significantly improved learning and memory function, increased acetylcholinesterase and choline acetyltransferase activity, increased the density of cholinergic neurons, and increased the number of BDNF-immunoreactive cells. These results indicate that rTMS can ameliorate learning and memory deficiencies in rats with vascular dementia, The mechanism through which this occurs might be related to the promotion of BDNF expression and subsequent restoration of cholinergic system activity in hippocampal CA 1 region.
基金supported by the National Natural Science Foundation of China,No.81603686,81603684the High School Science and Technology Fund Planning Project of Tianjin of China,No.20120211+1 种基金the Natural Science Foundation of Tianjin of China(Key Program),No.15JCZDJC36700,16JCZDJC37500the Natural Science Foundation of Tianjin of China,No.17JCYBJC26200
文摘Acupuncture can improve the cognitive state of Alzheimer＇s disease, but its mechanism is not clear. Dendritic atrophy and synaptic loss in Alzheimer＇s disease brain are positively correlated with cognitive damage. Therefore, we speculated that the effect of acupuncture on improving cognitive function may be associated with reduced dendritic damage in the brain. Acupuncture at Qihai（CV6）, Zhongwan（CV12）, Danzhong（CV17）, bilateral Zusanli（ST36）, and bilateral Xuehai（SP10） acupoints was performed once a day（1-day rest after 6-day treatment） for 14 consecutive days. Senescence-accelerated mouse prone 8（SAMP8） mice without acupuncture and senescence-accelerated mouse resistant 1（SAMR1） mice were used as normal controls. After 14 days of treatment, spatial learning and memory ability of mice was assessed in each group using the Morris water maze. Dendritic changes of pyramidal cells in the hippocampal CA1 region were analyzed by quantitative Golgi staining. Our results showed that acupuncture shortened escape latency and lengthened retention time of the former platform quadrant in SAMP8 mice. Further, SAMP8 mice exhibited a significant increase in the number of apical and basal dendritic branches and total length of apical and basal dendrites after acupuncture. These results suggest that acupuncture improves spatial learning and memory ability of middle-aged SAMP8 mice by ameliorating dendritic structure.Acupuncture can improve the cognitive state of Alzheimer＇s disease, but its mechanism is not clear. Dendritic atrophy and synaptic loss in Alzheimer＇s disease brain are positively correlated with cognitive damage. Therefore, we speculated that the effect of acupuncture on im- proving cognitive function may be associated with reduced dendritic damage in the brain. Acupuncture at Qihai （CV6）, Zhongwan （CV 12）, Danzhong （CV17）, bilateral Zusanli （ST36）, and bilateral Xuehai （SP10） acupoints was performed once a day （1-day rest after 6-day treat- ment） for 14
