期刊文献+
共找到462篇文章
< 1 2 24 >
每页显示 20 50 100
Protective Effect of Mulberry Extract against Pb-induced Learning and Memory Deficits in Mice 被引量:1
1
作者 CHEN Yao LI Qian +8 位作者 ZOU Ye ZHOU Zhao Xiang FENG Wei Wei BAO Yong Tuan MA Rui Hong JI Peng Cheng WU Jiang YANG Liu Qing WU Xiang Yang 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2014年第1期70-75,共6页
Lead (Pb) is ubiquitous in the environment, and low-level Pb exposure can cause neurotoxicity and irreversible damage to children's cognition, learning and memory ability. Nutritional intervention is an effective m... Lead (Pb) is ubiquitous in the environment, and low-level Pb exposure can cause neurotoxicity and irreversible damage to children's cognition, learning and memory ability. Nutritional intervention is an effective method to prevent Pb poisoning. Mul- berry is rich in anthocyanins, possessing protective effects for nerves. This study investigated the neuroprotective effects of mulberry extract (ME) against Pb-induced learning and memory deficits in mice. The results showed that the learning and memory abilities of mice, assessed using the Morris test, improved significantly after treatment with ME at a dose of 100 mg/kg body weight. The level of Pb in the brains of mice in the three ME intervention groups decreased significantly, while NO production and anti-oxidant enzymes were significantly restored. It is suggested that ME inhibits Pb-induced neurotoxicity by reversing Pb-induced alterations in the aspect of neurotoxic effects and improving learning and memory. 展开更多
关键词 PB Protective Effect of Mulberry Extract against Pb-induced learning and memory Deficits in mice DMSA ME SOD
下载PDF
Expression of miR-9-5p and RHOA in aluminum-induced rat cognitive dysfunction
2
作者 JIA Yun-jing ZHONG Bin +4 位作者 LI Chen-yu GAN Jue-fang LIAN Chun-rong LI Sha-sha LING Yan-wu 《Journal of Hainan Medical University》 CAS 2023年第14期22-27,共6页
Objective:To investigate the possible mechanism of microRNA-9-5p(miR-9-5p)and Ras homologous gene family A(RHOA)in aluminum-induced cognitive dysfunction in rats.Methods:According to the principle of randomization,48 ... Objective:To investigate the possible mechanism of microRNA-9-5p(miR-9-5p)and Ras homologous gene family A(RHOA)in aluminum-induced cognitive dysfunction in rats.Methods:According to the principle of randomization,48 Wistar rats were randomly divided into four groups(n=12)of blank control,low dose,medium dose and high dose.The blank control group was gavaged daily saline,and the other three dose groups were given daily gavage AlCl3 aqueous solution at three doses of 25 mg/kg,50 mg/kg,and 100 mg/kg to create a rat model of cognitive impairment for three months.The water maze(MWM)positioning navigation experiment was used to record the time t(s),namely,the incubation period,on the platform of rats,and the incubation period of each group was used to determine whether the rats in the infected group had learning and memory impairment.Hematoxylin-eosin(HE)and Nissl stains observed the pathological changes of nerve cells in the hippocampus of the four groups.Western blot detected the protein expression levels of RHOA and cranial neurotrophic factor(BDNF)in fresh rat hippocampal tissues.RT-qPCR detected the mRNA expression of miR-9-5p,RHOA,and BDNF in rat hippocampal tissues.Results:The results of Morris water maze positioning navigation test showed that the incubation period of each group was calculated on the 1st,3rd and 5th days of the experiment,and the motor incubation period of the infected group was higher than that of the control group.The results of HE staining showed that the rat nerve cells in the control group were morphologically intact,the staining was clear,the nucleus was clearly visible,and the edge of the cell membrane was sharp.The rat neurons in the infected group were damaged to varying degrees,the nucleus gradually dissolved,the cytoplasmic staining became deeper,the edges of the cell membrane were blurred and disordered,and the cells were deformed and arranged disordered.The results of Nissl staining showed that the well-stained Nissl body particles were visible in the nerve cells of rats in the control group,and the dissipation of Nissl bodies in the nerve cells of the infected group was reduced,and the staining was shallow.The results of RT-qPCR showed that compared with the control group,the mRNA expression of miR-9-5p and BDNF was decreased in the infected group,and the mRNA expression of RHOA was increased(P<0.05 or P<0.001).The Western blot results showed that compared with the control group,the relative expression of BDNF in the three infected groups was decreased,and the relative expression of RHOA increased(P<0.05).Conclusion:In aluminum-induced cognitive impairment,miR-9-5p is downregulated and RHOA is upregulatd. 展开更多
关键词 ALUMinUM HIPPOCAMPUS Cognitive dysfunction learning and memory miR-9-5p RHOA BDNF
下载PDF
Impacts of Passive Smoking on Learning and Memory Ability of Mouse Offsprings and Intervention by Antioxidants 被引量:4
3
作者 JIE YANG LI-NA JIANG +8 位作者 ZHEN-LI YUAN Yu-FEIZHENG Lu WANG MIN JI ZHI-QIANG SHEN XIN-WEI WANG QIANG MA ZHU-GE XI JUN-WEN LI 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2008年第2期144-149,共6页
Objective To determine the impact of passive smoking and the protective effect of antioxidants such as vitamin E and quercetin on learning and memory ability of mouse offsprings. Methods A passive smoking model of pre... Objective To determine the impact of passive smoking and the protective effect of antioxidants such as vitamin E and quercetin on learning and memory ability of mouse offsprings. Methods A passive smoking model of pregnant mice was established. Learning and memory ability was evaluated by the water maze test and long term potentiation (LTP). Nitric oxide (NO), content, nitric oxide synthase (NOS), acetylcholinesteras (Ache) activity in brain, vitamin E concentration, and reactive oxygen species (ROS) in serum were determined. The latency period (the time during which the mice swim from the starting position to the ending position) and errors (the number of mice entering the blind end) in control and antioxidant intervention groups were compared with those in the smoke exposure group after 6 days. Results The latency period as well as errors in the air, control diet, tobacco smoke (TS), and vitamin E diet groups were decreased significantly as compared with the TS and control diet groups (P〈O.05). LTP was restrained in the TS and control diet groups. LTP in all the antioxidant diet groups was significantly increased compared with the TS and control diet groups. In addition, NOS and acetylcholinesteras (Ache) activitiy was significantly higher in the TS and control diet groups than in the air and control diet group. NO content was not significantly different among the different groups, and significantly lower in the TS and vitamin E diet groups than in the TS group, control diet group, quercetin diet group, and mixture diet group (P〈0.05). Vitamin E concentration and ROS activity in serum were correlated with the outcome of water maze and LTP. Conclusion Passive smoking reduces LTP formation by disturbing the hippocampus function of mice, by decreasing NOS (especially vitamin E) partially improve the learning and memory smoke during pregnancy. and Ache activity and increasing NO content. Antioxidants ability of offsprings whose mothers are exposed to tobacco 展开更多
关键词 Passive smoking mice offspring learning and memory ability Long term potentiation Antioxidant intervention
下载PDF
Lithium chloride ameliorates learning and memory ability and inhibits glycogen synthase kinase-3 beta activity in a mouse model of fragile X syndrome 被引量:3
4
作者 Shengqiang Chen Xuegang Luo +6 位作者 Quan Yang Weiwen Sun Kaiyi Cao Xi Chen Yueling Huang Lijun Dai Yonghong Yi 《Neural Regeneration Research》 SCIE CAS CSCD 2011年第31期2452-2459,共8页
In the present study,Fmr1 knockout mice (KO mice) were used as the model for fragile X syndrome.The results of step-through and step-down tests demonstrated that Fmr1 KO mice had shorter latencies and more error cou... In the present study,Fmr1 knockout mice (KO mice) were used as the model for fragile X syndrome.The results of step-through and step-down tests demonstrated that Fmr1 KO mice had shorter latencies and more error counts,indicating a learning and memory disorder.After treatment with 30,60,90,120,or 200 mg/kg lithium chloride,the learning and memory abilities of the Fmr1 KO mice were significantly ameliorated,in particular,the 200 mg/kg lithium chloride treatment had the most significant effect.Western blot analysis showed that lithium chloride significantly enhanced the expression of phosphorylated glycogen synthase kinase 3 beta,an inactive form of glycogen synthase kinase 3 beta,in the cerebral cortex and hippocampus of the Fmr1 KO mice.These results indicated that lithium chloride improved learning and memory in the Fmr1 KO mice,possibly by inhibiting glycogen synthase kinase 3 beta activity. 展开更多
关键词 fragile X syndrome Fmr1 knockout mice step-down test step-through test learning and memory glycogen synthase kinase 3 beta lithium chloride
下载PDF
Chrysophanol attenuates lead exposure-induced injury to hippocampal neurons in neonatal mice 被引量:7
5
作者 Ji Zhang Chunlin Yan +3 位作者 Shu Wang Yong Hou Guiping Xue Li Zhang 《Neural Regeneration Research》 SCIE CAS CSCD 2014年第9期924-930,共7页
Previous studies have shown that chrysophanol protects against learning and memory impairments in lead-exposed adult mice. In the present study, we investigated whether chrysophanol can alleviate learning and memory d... Previous studies have shown that chrysophanol protects against learning and memory impairments in lead-exposed adult mice. In the present study, we investigated whether chrysophanol can alleviate learning and memory dysfunction and hippocampal neuronal injury in lead-exposed neonatal mice. At the end of lactation, chrysophanol(0.1, 1.0, 10.0 mg/kg) was administered to the neonatal mice by intraperitoneal injection for 15 days. Chrysophanol significantly alleviated injury to hippocampal neurons and improved learning and memory abilities in the lead-poisoned neonatal mice. Chrysophanol also significantly decreased lead content in blood, brain, heart, spleen, liver and kidney in the lead-exposed neonatal mice. The levels of malondialdehyde in the brain, liver and kidney were significantly reduced, and superoxide dismutase and glutathione peroxidase activities were significantly increased after chrysophanol treatment. Collectively, these findings indicate that chrysophanol can significantly reduce damage to hippocampal neurons in lead-exposed neonatal mice. 展开更多
关键词 nerve regeneration traditional Chinese medicine CHRYSOPHANOL lead poisoning lead MALONDIALDEHYDE superoxide dismutase glutathione peroxidase neurons neonatal mice antioxidant learning and memory Morris water maze step-down test hippocampal neurons ULTRASTRUCTURE Medical Scientific Research Project of Health Bureau of Hebei Province neural regeneration
下载PDF
电针干预阿尔茨海默病模型小鼠海马神经元和少突胶质细胞的增殖分化 被引量:3
6
作者 李龙洋 张松江 +2 位作者 赵献敏 周春光 高剑峰 《中国组织工程研究》 CAS 北大核心 2024年第7期1029-1035,共7页
背景:电针对阿尔茨海默病模型小鼠海马少突胶质细胞增殖分化的影响尚不清楚,而与少突胶质细胞有关的脱髓鞘反应却是阿尔茨海默病的常见病理反应。目的:探讨电针刺激阿尔茨海默病模型小鼠“百会”“风府”和双侧“肾俞”对内源性神经干... 背景:电针对阿尔茨海默病模型小鼠海马少突胶质细胞增殖分化的影响尚不清楚,而与少突胶质细胞有关的脱髓鞘反应却是阿尔茨海默病的常见病理反应。目的:探讨电针刺激阿尔茨海默病模型小鼠“百会”“风府”和双侧“肾俞”对内源性神经干细胞向神经元和少突胶质细胞增殖分化的影响及机制。方法:将6周龄清洁级APP/PS1转基因雄性阿尔茨海默病模型小鼠40只随机分为电针穴位组(n=20)和阿尔茨海默病模型组(n=20),另以同鼠龄的健康C57BL/6J雄性小鼠作为正常对照组(n=20)。电针穴位组小鼠电针“百会”“风府”和双侧“肾俞”穴位16周后(每天20 min,每周6 d),水迷宫检测其学习记忆功能;免疫组化染色检测海马齿状回β-淀粉样蛋白老年斑表达;免疫荧光双标检测海马齿状回Brd U/Neu N和Brd U/GALC的表达;免疫印迹检测海马神经元特异性蛋白Nestin和少突胶质细胞特异性蛋白GALC的表达水平;实时荧光定量PCR和免疫印迹检测海马Notch1和Hes1的m RNA及蛋白水平。结果与结论:(1)相对于正常对照组,模型组小鼠学习记忆能力明显下降;海马齿状回β-淀粉样蛋白老年斑明显增多(P<0.01);海马GALC和Nestin表达明显减少(P<0.01,P<0.05);(2)相对于模型组,电针穴位组小鼠学习记忆能力明显增加;海马齿状回β-淀粉样蛋白老年斑明显减少(P<0.01);海马Brd U/Neu N双标阳性细胞和Nestin蛋白表达明显增多(P<0.01,P<0.05);海马区GALC表达明显增多(P<0.01);海马区Notch1的m RNA及蛋白水平均明显升高(P<0.05,P<0.01);海马区Hes1的m RNA及蛋白水平均明显下降(P<0.05);(3)结果表明,电针阿尔茨海默病模型小鼠“百会”“风府”和双侧“肾俞”促进内源性神经干细胞向神经元和少突胶质细胞方向增殖分化,此作用可能由Notch1/Hes1通路调节。 展开更多
关键词 阿尔茨海默病 电针 小鼠 学习记忆 神经元 少突胶质细胞 NOTCH通路
下载PDF
Effects of Bushen Huoxue Formula on the Learning and Memory Function and the Cerebral Neurotransmitters in Diabetic Mice 被引量:3
7
作者 田国庆 卢贺起 +3 位作者 郭赛珊 张玲 樊莎莎 王友京 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2010年第3期201-205,共5页
Objective: To observe the effects of Bushen Huoxue Formula (Formula for reinforcing the kidney and activating blood circulation) on the learning and memory function and the cerebral neurotransmitters in diabetic mice.... Objective: To observe the effects of Bushen Huoxue Formula (Formula for reinforcing the kidney and activating blood circulation) on the learning and memory function and the cerebral neurotransmitters in diabetic mice. Methods: Forty ICR mice were randomized into the normal control group, model group, Nimotop group and Chinese medicine group, 10 mice in each group. Tail intravenous injection of alloxan was applied to prepare diabetic model. Four weeks later, intragastric administration of Bushen Huoxue Formula for the Chinese medicine group, Nimotop for the Nimotop group, and isometric distilled water for the other two groups were respectively given for 8 weeks. The changes in the blood sugar level were observed; the learning and memory function was detected by Morris labyrinth test; and the contents of norepinephrine (NE), dopamine (DA), 5-hydroxyltryptamine (5-HT) and 5-hydroxyl indole acetic acid (5-HIAA) in cerebral cortex were determined in mice of all the groups. Results: The blood sugar levels in the diabetic model mice significantly increased as compared with those of the normal control group determined 72 h and 12 weeks later (P<0.05 or P<0.01). Latencies for Morris labyrinth test in the Nimotop group and the Chinese medicine group were significantly shortened as compared with that in the model group (P<0.01). The contents of cortical NE in the Chinese medicine group was significantly higher than that in the model group (P<0.01). Conclusion: Bushen Huoxue Formula can improve the learning and memory function in the diabetic mice, and the mechanism is possibly related with change of the cortical NE content. 展开更多
关键词 Bushen Huoxue Formula (Formula for reinforcing the kidney and activating blood circulation) DIABETES learning and memory function NEUROTRANSMITTERS mice
原文传递
Long-term consumption of virgin coconut (Cocos nucifera) oil diet impairs learning and memory in CD1 mice 被引量:1
8
作者 Sunday A.Bisong Clement O.Nku +3 位作者 Olushola A.Sanya Sunday O.Ita Victor A.Fischer Favour E.Abuo 《Chinese Herbal Medicines》 CAS 2020年第4期414-420,共7页
Objective:Virgin coconut oil(VCO)has been used in the management of dementia in Alzheimer’s disease(AD).Therefore,this research investigated the effect of long-term consumption of VCO diet on learning and memory in C... Objective:Virgin coconut oil(VCO)has been used in the management of dementia in Alzheimer’s disease(AD).Therefore,this research investigated the effect of long-term consumption of VCO diet on learning and memory in CD1 mice.Methods:Thirty male CD1 mice(divided into three groups,n=10)were fed with standard rodent chow(control),5%and 20%VCO diets(respectively)for 28 d.The Morris Water Maze(MWM)test was used to test the effect of VCO on visuo-spatial learning and memory,while the Novel Object Recognition Test(NORT)was used to measure short-and long-term recognition memory.Results:Learning performance of mice did not differ in the MWM.During the probe trial,duration in the retention quadrant and annulus crossings were lower(P<0.05)in the 5%and 20%VCO diet groups compared to the control diet group,showing that VCO impaired visuo-spatial memory.During the NORT,mice showed more total approaches in the 20%VCO diet group(P<0.05)compared to control and the 5%VCO diet groups during the short-term memory test.During the long-term memory retention test,the total approaches were also higher in the 20%VCO group compared to control and 5%VCO group(P>0.05).The discrimination index was also lower in the 20%VCO group compared to control and 5%VCO diet groups indicating impaired long-term cognitive memory in mice given 20%VCO diet.Histological examination of brains showed damage within the CA1 pyramidal cell layer of the hippocampus in the 20%VCO diet group,in line with the behavioural observations.Conclusion:Long-term consumption of virgin coconut oil diet impairs memory in mice. 展开更多
关键词 Cocos nucifera Linn learning and memory mice virgin coconut oil
原文传递
电针神庭、百会穴通过ARC/GluR2/NMDAR2B调节海马突触可塑性改善MCAO/R大鼠学习记忆的机制研究 被引量:1
9
作者 杨嘉誉 马小涵 +2 位作者 张蕴 李钻芳 林如辉 《中国中医急症》 2024年第3期409-414,共6页
目的观察电针神庭、百会穴对大脑中动脉闭塞再灌注(MCAO/R)大鼠学习记忆功能改善的作用机制。方法线栓法制备MCAO/R大鼠模型。24只雄性SD大鼠随机分为模型组(n=6)、电针组(n=6)、非穴组(n=6)和假手术组(n=6)。电针组大鼠选取百会、神庭... 目的观察电针神庭、百会穴对大脑中动脉闭塞再灌注(MCAO/R)大鼠学习记忆功能改善的作用机制。方法线栓法制备MCAO/R大鼠模型。24只雄性SD大鼠随机分为模型组(n=6)、电针组(n=6)、非穴组(n=6)和假手术组(n=6)。电针组大鼠选取百会、神庭穴,非穴组选取双侧胁下非经非穴,共电针7 d。ZeaLonga评分法对各组大鼠进行神经功能缺损评分,新物体识别评估大鼠的学习记忆能力,小动物磁共振T2WI系列扫描梗死面积,HE染色观察缺血侧海马病理形态,波谱(1HMRS)比较各组海马区N-乙酰天冬氨酸(NAA)、肌酸(Cr)和谷氨酸(Glu)代谢物含量,Western blotting检测缺血侧海马ARC/GluR2/NMDAR2B的表达情况。结果干预7 d后,与模型组及非穴组比较,电针组大鼠神经功能缺损评分显著降低(P<0.05),电针组大鼠新物体识别指数较模型及非穴组升高(P<0.05)。磁共振T2WI显示电针组的梗死面积较模型组、非穴组明显减小(P<0.05),波谱显示电针组较模型和非穴组海马区NAA/Cr比值明显增高(P<0.001),GLU/Cr降低(P<0.01)。Western blotting结果表明电针组大鼠缺血侧海马中NMDAR2B含量明显低于模型组和非穴组(P<0.01),ARC及GluR2含量高于模型及非穴组(P<0.05)。结论电针神庭、百会穴能够改善MCAO/R大鼠的神经缺损情况,提高学习记忆能力,降低缺血侧梗死面积,改善病理形态,提高神经元兴奋性,降低膜后谷氨酸累积,其机制可能与促进MCAO/R大鼠海马区ARC、GluR2,抑制NMDAR2B的表达,进而改善卒中后海马突触可塑性损伤有关。 展开更多
关键词 脑卒中 学习记忆功能障碍 突触可塑性 细胞骨架蛋白 谷氨酸受体 大鼠
下载PDF
Biological Background of Kh.DIC Mice and Their Learning and Memory Defects
10
作者 潘卫松 邢东明 +4 位作者 秦川 孙虹 高虹 金文 杜力军 《Tsinghua Science and Technology》 SCIE EI CAS 2003年第4期508-516,共9页
The learning ability of the Kh.DIC mice, a mutant of the Kunming mice, was studied to analyze its memory development. The mice's brain function was evaluated using a water maze with the amount of monoamines measur... The learning ability of the Kh.DIC mice, a mutant of the Kunming mice, was studied to analyze its memory development. The mice's brain function was evaluated using a water maze with the amount of monoamines measured by fluorospectrophotometry and enzyme activities detected by ultraviolet spectrophotometry. The mice were found to have spacial learning and memory defects at the age of 1 month in both ordinary animals and in special pathogen free (SPF) animals. At the same time, the amount of monoamines and the activities of monoamine oxidase B and dopamine β hydroxylase differed from those of the Kunming mice. The defects might be related to the differences in the monoamine neurotransmitter system. The results suggest that the DIC mice may be useful economic animal models for the study of brain defects. 展开更多
关键词 mice STRAinS biological characteristics learn and memory NEUROTRANSMITTER
原文传递
The mixture of procyanidins extracted from the lotus seed pod and bilobalide ameliorates scopolamine-induced memory impairment in mice 被引量:1
11
作者 张丽 许继取 +4 位作者 荣爽 谢笔钧 孙智达 张允建 刘烈刚 《Neuroscience Bulletin》 SCIE CAS CSCD 2009年第4期203-208,共6页
Objective To study the co-effect of procyanidins extracted from the lotus seed pod (LSPC) and bilobalide (BIL) on ameliorating scopolamine-induced learning and memory impairment in young mice. Methods Fifty male K... Objective To study the co-effect of procyanidins extracted from the lotus seed pod (LSPC) and bilobalide (BIL) on ameliorating scopolamine-induced learning and memory impairment in young mice. Methods Fifty male Kunming mice with similar learning and memory capabilities were selected by Morris water maze test and were randomized into 5 groups (n=10 in each group): control group, scopolamine group, L-(LSPC+BIL) group (50 mg/kg LSPC+10 mg/kg BIL), M-(LSPC+BIL) group (100 mg/kg LSPC+20 mg/kg BIL), H-(LSPC+BIL) group (150 mg/kg LSPC+30 mg/kg BIL). Scopolamine model with impaired learning and memory was established by scopolamine treatment (1 mg/kg), and after 10 min mice were tested. In L-, M-, and H- (LSPC+BIL) groups, mice were treated with LSPC and BIL ig. for 30 days, while mice in the other 2 groups were treated with normal saline ig. instead. After the 30-day's treatment, the co-effect of LSPC and BIL on learning and memory was tested by Morris water maze and the step-down avoidance tests. Results The memory impairment caused by scopolamine in young mice could be ameliorated by co-treatment of LSPC and BIL, as indicated by significantly shorter escape latency and swimming distance in the Morris water maze test, when compared with those in the scopolamine group. In the step-down avoidance test, mice in all the 3 dose groups showed significantly smaller number of errors and longer latency than mice in the scopolamine group did. Conclusion Co-treatment of LSPE and BIL can ameliorate scopolamine-induced learning and memory impairment in young mice. 展开更多
关键词 lotus seed pod procyanidins BILOBALIDE SCOPOLAMinE mice learning and memory
原文传递
血管性痴呆小鼠海马CA1区CalpainⅠ表达的变化 被引量:5
12
作者 王天俊 郎静芳 +4 位作者 吕佩源 张和振 刘昌林 靳玮 郭宗成 《疑难病杂志》 CAS 2010年第2期85-87,F0003,共4页
目的探讨脑缺血—再灌注后不同时期血管性痴呆(VD)小鼠海马CA1区病理改变及CalpainⅠ表达的变化。方法243只雄性昆明小鼠随机分为假手术组(99只)和模型组(144只),VD动物模型采用双侧颈总动脉反复缺血—再灌注合并尾端放血的方法制备;分... 目的探讨脑缺血—再灌注后不同时期血管性痴呆(VD)小鼠海马CA1区病理改变及CalpainⅠ表达的变化。方法243只雄性昆明小鼠随机分为假手术组(99只)和模型组(144只),VD动物模型采用双侧颈总动脉反复缺血—再灌注合并尾端放血的方法制备;分别于造模后第4周、6周和8周测试小鼠的学习和记忆成绩,HE染色观察小鼠海马CA1区正常神经元计数,免疫组化方法观察CalpainⅠ的表达。结果造模后4周、6周和8周时模型组小鼠的学习、记忆成绩均明显劣于假手术组小鼠(P<0.05)。假手术组海马CA1区单位面积正常神经元计数分别为(102±15)个、(108±11)个和(101±12)个;模型组分别为(65±19)个、(21±3)个和(50±11)个,较假手术组均显著降低(P<0.05),其中以造模后6周损害最严重,较模型组造模后4、8周时也显著减少(P<0.05)。假手术组造模后4周、6周和8周时小鼠海马CA1区CalpainⅠ的平均OD值分别是0.030±0.003、0.031±0.003和0.029±0.003;模型组CalpainⅠ的平均OD值分别是0.099±0.009、0.121±0.010和0.115±0.010,较假手术组均显著增高(P<0.05),尤以术后6周时增高明显。结论脑缺血—再灌注6周时海马CA1区神经元损害最严重,CalpainⅠ参与了脑缺血—再灌注后小鼠VD的发生。 展开更多
关键词 痴呆 血管性 学习 记忆 CALPAin I表达 海马CAI区 小鼠
下载PDF
茜草素对APP/PS1双转基因小鼠肠道菌群的干预作用及机制研究
13
作者 边宇航 宁天一 +6 位作者 王震红 张凌 崔子寅 吴运谱 张泽辉 王春田 梁喜才 《中国预防兽医学报》 CAS CSCD 北大核心 2024年第6期584-592,共9页
为研究茜草素(AZ)对APP/PS1双转基因小鼠(APP/PS1小鼠)肠道菌群、学习与记忆能力的影响,本实验将APP/PS1小鼠分为模型组(APP/PS1组)、AZ组[低剂量(Low)、中等剂量(Middle)、高剂量(High)]、阳性对照组[盐酸多奈哌齐(Donepezil组)],以APP... 为研究茜草素(AZ)对APP/PS1双转基因小鼠(APP/PS1小鼠)肠道菌群、学习与记忆能力的影响,本实验将APP/PS1小鼠分为模型组(APP/PS1组)、AZ组[低剂量(Low)、中等剂量(Middle)、高剂量(High)]、阳性对照组[盐酸多奈哌齐(Donepezil组)],以APP/PS1阴性小鼠为空白对照组(Control组)。AZ组小鼠连续给药AZ 4周后,利用Morris水迷宫检测各组小鼠的学习与记忆能力;利用16S rRNA基因测序检测各组小鼠粪便肠样品中道菌群的变化。结果显示,与Control组小鼠相比,APP/PS1组小鼠逃避潜伏期显著延长(P<0.05)、穿越平台次数和象限停留时间极显著或显著减少(P<0.01、P<0.05),本实验选择AZ中剂量组(20 mg/kg AZ)进行后续试验;模型组小鼠肠道菌群多样性明显改变、菌落组成差异明显。给予AZ干预后,小鼠逃避潜伏期显著缩短(P<0.05)、穿越平台次数和象限停留时间均显著增加(P<0.05);AZ能有效提高APP/PS1小鼠肠道菌群多样性及改变肠道微生物结构,在门水平上,AZ能提高小鼠肠道厚壁菌门丰度,降低拟杆菌门相对丰度;在科水平上,AZ增加了小鼠肠道Muribaculaceae和Lachnospiraceae细菌的相对丰度,降低了Prevotellaceae、norank_o__Clostridia_UCG-014、Ruminococcaceae等菌群丰度;在属水平上,AZ明显提高了小鼠肠道Lactobacillus的相对丰度,进一步筛选出AZ组小鼠肠道优势菌种为o__Lactobacillales、f__Lactobacillaceae、g__Lactobacillus。通过PICRUSt2功能预测分析发现,AZ调节小鼠肠道菌群功能与炎症相关信号通路有关。本研究首次证实AZ可通过调节肠道菌群改善APP/PS1小鼠的学习及记忆能力,其机制与炎症信号通路有关,为AZ的临床应用奠定基础。 展开更多
关键词 茜草素 APP/PS1双转基因小鼠 肠道菌群 学习与记忆能力
下载PDF
石菖蒲-熟地黄对认知功能障碍模型大鼠的网络药理学作用机制及实验研究
14
作者 李思敏 张杰 +1 位作者 宋晓雨 王旭 《世界中医药》 CAS 北大核心 2024年第3期299-307,共9页
目的:探究石菖蒲-熟地黄对认知功能障碍模型大鼠学习记忆力的影响及作用机制,并进行实验验证。方法:在中药系统药理学数据库与分析平台(TCMSP)、人类基因数据库(GeneCards)、在线人类孟德尔遗传数据库(OMIM)中获取石菖蒲-熟地黄药对治... 目的:探究石菖蒲-熟地黄对认知功能障碍模型大鼠学习记忆力的影响及作用机制,并进行实验验证。方法:在中药系统药理学数据库与分析平台(TCMSP)、人类基因数据库(GeneCards)、在线人类孟德尔遗传数据库(OMIM)中获取石菖蒲-熟地黄药对治疗认知功能障碍的潜在作用靶点,并构建蛋白质-蛋白质相互作用(PPI)网络,在生物学信息注释库(DAVID)分析平台中对共同靶点进行基因本体(GO)和京都基因和基因组百科全书(KEGG)通路富集分析。基于网络药理学预测结果,用动物实验进行验证。采用双侧脑室注射脂多糖(LPS)的方法模拟中枢神经炎症损伤引起的认知障碍模型,连续灌胃给药8周,假手术组予以注射等量生理盐水。Morris水迷宫观察各组大鼠空间学习记忆力的变化情况;酶联免疫吸附试验(ELISA)检测大鼠血清肿瘤坏死因子-α(TNF-α)含量;蛋白质印迹法(Western Blotting)检测Toll样受体4/核因子κB(TLR4/NF-κB)通路相关蛋白含量。结果:从石菖蒲-熟地黄药对中筛选到26个有效成分,疾病相关靶点64个,涉及晚期糖基化终末产物-晚期糖基化终末产物受体(AGE-RAGE)信号通路、TNF信号通路、白细胞介素17(IL-17)信号通路、Toll样受体通路、NF-κB信号通路等5条主要信号通路。动物实验结果显示,石菖蒲-熟地黄中、高剂量组大鼠逃避潜伏期明显缩短(P<0.05),在目标象限停留时间明显延长(P<0.05),TNF-α的表达水平明显降低(P<0.05);石菖蒲-熟地黄低、中、高剂量组能显著降低TLR4、p-NF-κB p65/NF-κB p65、IL-6的表达(P<0.05)。结论:石菖蒲-熟地黄可能通过TLR4/NF-κB通路减少炎症介质释放,抑制神经炎症来干预认知功能障碍的发生发展,为该药对抗认知功能障碍有效成分的开发和运用提供了方向。 展开更多
关键词 认知功能障碍 石菖蒲-熟地黄 网络药理学 学习记忆力 神经炎症 Toll样受体4/核因子κB通路 炎症介质 机制研究
下载PDF
5×FAD转基因小鼠在阿尔茨海默病研究中的应用进展
15
作者 刘怡端 刘翼骁 +2 位作者 韩欣园 肖依彤 叶田园 《中国实验动物学报》 CAS CSCD 北大核心 2024年第2期260-274,共15页
5×FAD转基因小鼠(transgenic mice with five familial Alzheimer’s disease)是携带5个家族性基因突变的APP/PS1转基因小鼠,其中与β-淀粉样蛋白前体(amyloid precursor protein,APP)相关的突变为K670N/M671L(Swedish)、1716V(Flo... 5×FAD转基因小鼠(transgenic mice with five familial Alzheimer’s disease)是携带5个家族性基因突变的APP/PS1转基因小鼠,其中与β-淀粉样蛋白前体(amyloid precursor protein,APP)相关的突变为K670N/M671L(Swedish)、1716V(Florida)和V7171(London),与早老素-1(presenilin 1,PS1)相关的突变为MI46L和L286V。5×FAD小鼠在1.5月龄时脑内已有大量的β-淀粉样蛋白(β-amyloid,Aβ),2月龄时开始出现神经炎性斑(neuritic plaque,NP)。5×FAD小鼠的病理表型包括淀粉样斑块聚集、神经元丢失、神经胶质细胞增生和记忆功能障碍等。5×FAD小鼠的生物学特性可能涉及脑内Aβ斑块的形成变化、Tau蛋白过度磷酸化、突触功能障碍、神经炎症反应、线粒体功能障碍、血脑屏障损伤、神经元损伤、内质网应激和眼部病变等。作为阿尔茨海默病的经典动物模型,5×FAD转基因小鼠在早期即可模拟AD患者晚期的神经病理过程及行为学表现,被广泛应用于AD发病机制研究和AD新药开发。本文对5×FAD转基因小鼠模型的模型构建、生物学背景、生物学特性及AD防治药物的研发应用进行总结,以期为5×FAD转基因小鼠在AD研究中的应用提供参考与借鉴作用。 展开更多
关键词 阿尔茨海默病 5×FAD转基因小鼠 学习记忆 认知功能
下载PDF
地黄饮子调节海马神经突触可塑性作用机制研究
16
作者 李少创 韩诚 +5 位作者 张正 赵雅飞 秦亚莉 刘昕 贺文彬 张俊龙 《山东中医药大学学报》 2024年第3期337-347,共11页
目的:观察地黄饮子改善阿尔茨海默病(AD)模型小鼠学习记忆能力及对海马突触可塑性的影响,探讨AD治疗机制。方法:选用50只6月龄SAMP8小鼠构建AD动物模型,采用RANDBETWEEN随机函数将其分为模型组、盐酸美金刚组及地黄饮子低、中、高剂量组... 目的:观察地黄饮子改善阿尔茨海默病(AD)模型小鼠学习记忆能力及对海马突触可塑性的影响,探讨AD治疗机制。方法:选用50只6月龄SAMP8小鼠构建AD动物模型,采用RANDBETWEEN随机函数将其分为模型组、盐酸美金刚组及地黄饮子低、中、高剂量组各10只,选用同龄SAMR1小鼠10只作为正常组。地黄饮子各剂量组及盐酸美金刚组按照给药剂量给予相应药物灌胃,正常组和模型组给予等体积纯水灌胃,连续给药12周。新物体识别、Morris水迷宫、巴恩斯迷宫法分别检测小鼠的学习记忆能力,在体海马场电位实验记录小鼠海马长时程增强(LTP)效应,免疫组化实验检测突触后致密蛋白-95(PSD-95)、突触素(SYN)蛋白水平的变化,蛋白质印迹法检测海马神经元NMDAR1、NMDAR2B、Ca2+在细胞内所结合钙调蛋白依赖性蛋白激酶Ⅱ(CaMKⅡ)蛋白表达情况。结果:与模型组比较,地黄饮子各剂量组小鼠新物体识别系数增加,差异有统计学意义(P<0.001);在目标象限停留时间明显增加,差异均有统计学意义(P<0.05,P<0.01),且平台穿越次数增加,逃避潜伏期缩短;进入逃生箱所需时间减少,但差异无统计学意义(P>0.05),在逃生箱所在象限停留时间明显增加,差异有统计学意义(P<0.05)。在体海马场电位记录实验表明,高频刺激前各组小鼠fEPSPs斜率无明显差异,高频刺激后30 min、60 min地黄饮子各剂量组较模型组斜率增高,差异均有统计学意义(P<0.05)。与模型组比较,地黄饮子各剂量组CA1区海马神经元PSD-95蛋白、SYN蛋白表达水平上升;地黄饮子各剂量组CA3区海马神经元PSD-95蛋白、SYN蛋白表达水平上升。与模型组比较,地黄饮子各剂量组海马神经元CaMKⅡ、NMDAR1、NMDAR2B蛋白表达水平升高。结论:地黄饮子能改善AD模型小鼠的学习记忆能力,机制可能为通过调节海马神经元Ca2+维持神经突触可塑性,。 展开更多
关键词 阿尔茨海默病 地黄饮子 海马 突触可塑性 长时程增强效应 钙离子 小鼠 学习记忆能力
下载PDF
Recent advances in the effects of microwave radiation on brains 被引量:3
17
作者 Wei-Jia Zhi Li-Feng Wang Xiang-Jun Hu 《Military Medical Research》 SCIE CAS 2018年第2期165-177,共13页
This study concerns the effects of microwave on health because they pervade diverse fields of our lives. The brain has been recognized as one of the organs that is most vulnerable to microwave radiation. Therefore, in... This study concerns the effects of microwave on health because they pervade diverse fields of our lives. The brain has been recognized as one of the organs that is most vulnerable to microwave radiation. Therefore, in this article, we reviewed recent studies that have explored the effects of microwave radiation on the brain, especially the hippocampus, including analyses of epidemiology, morphology, electroencephalograms, learning and memory abilities and the mechanisms underlying brain dysfunction. However, the problem with these studies is that different parameters, such as the frequency, modulation, and power density of the radiation and the irradiation time, were used to evaluate microwave radiation between studies. As a result, the existing data exhibit poor reproducibility and comparability. To determine the specific dose-effect relationship between microwave radiation and its biological effects, more intensive studies must be performed. 展开更多
关键词 MICROWAVE CENTRAL nervous system dysfunction of learning and memory ABILITIES
下载PDF
Long-term Impact of Intrauterine MCMV Infection on Development of Offspring Nervous System 被引量:4
18
作者 陈娟娟 冯燕 +4 位作者 陈莉 肖娟 刘涛 尹宗智 陈素华 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2011年第3期371-375,共5页
This study examined the impacts of intrauterine murine cytomegalovirus(MCMV) infection on the long-term learning and memory of offspring.Sexually matured male and female BALB/C mice without MCMV infection were ident... This study examined the impacts of intrauterine murine cytomegalovirus(MCMV) infection on the long-term learning and memory of offspring.Sexually matured male and female BALB/C mice without MCMV infection were identified by ELISA and then mated.Seventy pregnant mice were randomly divided into the virus group(n=40) and the control group(n=30),in which the pregnant mice were subjected to placenta inoculation of MCMV suspension(1 μL,1×106 PFU) or the same amount of cell culture medium,respectively,at gestational age of 12.5 days.Some pregnant mice [virus group(n=20),control group(n=15)] were sacrificed by cervical dislocation at gestational age of 18.5 days,and the head circumference and brain weight of the mouse fetuses were measured,and the MCMV infection in their brain tissues was detected by PCR.The other pregnant mice [virus group(n=20),control group(n=15)] delivered naturally,and the learning and memory capability of the offspring at 70-day-old was analyzed by Morris water maze test.The results showed that 28.57% mouse fetuses in the virus group developed viral infection in the brain.Their head circumference and brain weight were significantly reduced as compared with those in the control group(P0.01).The Morris water maze test revealed that the mouse offspring in the control group found the platform with straight-line trajectories after training.In contrast,the counterparts in the virus group intended to enter the central area,but looked for the platform with a circular trajectory.And the infected mice exhibited prolonged swimming distance and swimming latency(P0.01).It was concluded that:(1) placenta inoculation of MCMV can cause fetal brain infection and intrauterine development retardation;(2) the offspring of MCMV placenta inoculation mice showed a long-term decline in learning and memory capability. 展开更多
关键词 CYTOMEGALOVIRUS mice intrauterine infection learning and memory
下载PDF
Aquaporin 4 deficiency eliminates the beneficial effects of voluntary exercise in a mouse model of Alzheimer’s disease 被引量:4
19
作者 Yun Liu Pan-Pan Hu +6 位作者 Shuang Zhai Wei-Xi Feng Rui Zhang Qian Li Charles Marshall Ming Xiao Ting Wu 《Neural Regeneration Research》 SCIE CAS CSCD 2022年第9期2079-2088,共10页
Regular exercise has been shown to reduce the risk of Alzheimer’s disease(AD).Our previous study showed that the protein aquaporin 4(AQP4),which is specifically expressed on the paravascular processes of astrocytes,i... Regular exercise has been shown to reduce the risk of Alzheimer’s disease(AD).Our previous study showed that the protein aquaporin 4(AQP4),which is specifically expressed on the paravascular processes of astrocytes,is necessary for glymphatic clearance of extracellular amyloid beta(Aβ)from the brain,which can delay the progression of Alzheimer’s disease.However,it is not known whether AQP4-regulated glymphatic clearance of extracellular Aβis involved in beneficial effects of exercise in AD patients.Our results showed that after 2 months of voluntary wheel exercise,APP/PS1 mice that were 3 months old at the start of the intervention exhibited a decrease in Aβburden,glial activation,perivascular AQP4 mislocalization,impaired glymphatic transport,synapse protein loss,and learning and memory defects compared with mice not subjected to the exercise intervention.In contrast,APP/PS1 mice that were 7 months old at the start of the intervention exhibited impaired AQP4 polarity and reduced glymphatic clearance of extracellular Aβ,and the above-mentioned impairments were not alleviated after the 2-month exercise intervention.Compared with age-matched APP/PS1 mice,AQP4 knockout APP/PS1 mice had more serious defects in glymphatic function,Aβplaque deposition,and cognitive impairment,which could not be alleviated after the exercise intervention.These findings suggest that AQP4-dependent glymphatic transport is the neurobiological basis for the beneficial effects of voluntary exercises that protect against the onset of AD. 展开更多
关键词 Alzheimer’s disease AMYLOID-BETA ASTROCYTES AQUAPORin-4 glymphatic system learning and memory synaptic protein transgenic mice voluntary exercise
下载PDF
Age-related changes of senescence-accelerated mouse prone 10 (SAMP10) mice as an animal model for AD
20
作者 Lei Yu Linna Gao +2 位作者 Xue Bai Ruomei Che Xiaoli He 《Life Research》 2019年第4期124-136,共13页
Background: To explore the influence of age-related changes in learning and memory capacity of SAMP10, an Alzheimer's disease (AD) model mice, and provide theoretical foundation for the selection of month age in r... Background: To explore the influence of age-related changes in learning and memory capacity of SAMP10, an Alzheimer's disease (AD) model mice, and provide theoretical foundation for the selection of month age in related experiment. Methods: SAMP10 female mice with the age of 3, 6 and 9 months were used as the objects of experiment, while the age-matched female SAMR1 were used as the controls, with 12 in each group. The learning memory capacity of mice at different age was detected through Morris water maze and step-down passive avoidance test;meanwhile, the acetylcholine, acetylcholinesterase, choline acetyltransferase, and M-cholinergic receptor binding capacity levels were determined to detect the cholinergic system damage degree in mice with different month age. In addition, the contents of monoamine neurotransmitters such as dopamine, 3,4-dihydroxyphenyl acetic acid, homovanillic acid, norepinephrine and 5-HT, as well as those of amino acid transmitters such as glutamic acid, glutamine, aspartic acid,γ-aminobutyric acid, taurine and glycine in the brain cortex were detected by high performance liquid chromatography-electrochemical deposition. Besides, changes in hippocampal neurons were observed through Nissl staining, and the changes of Aβ in hippocampal CA1 and CA2 regions of SAMP10 were also detected by immunohistochemistry so as to explore the effects of age on the memory capacity of SAMP10. Results: It was discovered in the behavior test and AD-related index tests that: there was no significant difference between the age-matched SAMR1 and the SAMP10 at the age of 3 and 6 months. But the 9-months-old mice suffered remarkable senescence characteristics, including obviously declined learning memory capacity;down-regulated neurotransmitter levels, enzyme activities and amino acid expression;reduced hippocampal neuron number;and increased deposition of hippocampal Aβ protein. Conclusion: It is discovered in this study through behavior tests and AD-related indexs detection that, the learning memory capacity of SAMP10 shows age-dependence, which is gradually decreased with the increase of age, and the 9-months-old mice have developed marked memory impairment and senescence characteristics. SAMP10 is the recognized AD model, the appropriate month age for preventive medication is about 7 months, while that for therapeutic medication is 8-9 months. 展开更多
关键词 Senescence-accelerated mice 10 Alzheimer's disease learning and memory IMPAIRMENT CHOLinERGIC system Monamine Amino acid
下载PDF
上一页 1 2 24 下一页 到第
使用帮助 返回顶部