目的探索精神分裂断裂基因1(DISC1)对APP/PS1转基因阿尔茨海默病(Alzheimer′s disease,AD)小鼠突触可塑性及学习记忆能力的影响。方法 Western blot比较正常人和AD患者脑组织中DISC1的表达情况;体外培养C57胎鼠神经元,分为GFP组、GFP+...目的探索精神分裂断裂基因1(DISC1)对APP/PS1转基因阿尔茨海默病(Alzheimer′s disease,AD)小鼠突触可塑性及学习记忆能力的影响。方法 Western blot比较正常人和AD患者脑组织中DISC1的表达情况;体外培养C57胎鼠神经元,分为GFP组、GFP+Aβ组、DISC1+Aβ组,激光共聚焦显微镜观察神经元树突棘。取2月龄的C57小鼠,海马注射对照病毒和DISC1过表达病毒,切脑片后Aβ处理,膜片钳技术检测长时程增强(LTP),评价突触可塑性。将C57小鼠分为WT+GFP组、TG+GFP组、TG+DISC1组三组,免疫荧光染色方法检测细胞中小鼠脑中Aβ斑块沉积;Morris水迷宫检测各组小鼠学习、记忆能力。结果与正常人比较,AD患者大脑中DISC1的表达量减少(P <0.05);与GFP组比较,GFP+Aβ组树突棘数量减少,而DISC1+Aβ组较GFP+Aβ组树突棘数量增多;Aβ处理后,小鼠脑切片的LTP减弱,而过表达DISC1后再行Aβ处理,LTP较只用Aβ处理增强;TG+DISC1组较TG+GFP组小鼠海马中的Aβ斑块减少(P <0.05),且寻找平台的时间更短、穿越平台的次数更多(P <0.05)。结论过表达DISC1对APP/PS1转基因AD小鼠突触可塑性具有保护作用并能够改善其学习记忆能力。展开更多
OBJECTIVE DL0410,one novel compound discovered inhigh throughput screening(HTS),was found to be a potent inhibitor for AChE and BuChE.Memory deficit mice model induced by scopolamine have been conducted to verify its ...OBJECTIVE DL0410,one novel compound discovered inhigh throughput screening(HTS),was found to be a potent inhibitor for AChE and BuChE.Memory deficit mice model induced by scopolamine have been conducted to verify its effects on the improvement of memory deficit.In this study,the effects of DL0410 on inhibitingβ-amyloid(Aβ)aggregation and attenuating cognition and memory impairment of APP/PS1 mice were further investigated.METHODS Th-T binding test was used to determinethe effect of DL0410 on Aβ1-42 aggregation.In addition,locomotor test,object recognition test,step-down test,and Morris Water maze were performedto investigate the effect of DL0410 on the cognition and memoryfunctions of APP/PS1 mice.RESULTS In vitro results showed that DL0410(10and 30μmol·L-1)could inhibit significantly the monomer Aβ1-42 from aggregation,when incubated together with monomer Aβ1-42 for 24h(P<0.01).Several behavioral tests demonstrated that DL0410(10and 30mg·kg-1)could shortened latency time innavigation test(P<0.01),increased platform crossing-times in space probe test(P<0.05),and reduced the error times in step-down test(P<0.01).CONCLUSIONDL0410 could inhibit Aβaggregation in vitro and alleviate cognition and memory impairment of APP/PS1 mice,which make DL0410 apromising candidate for Alzheimer′s disease treatment.展开更多
基金The project supported by Ministry of Science and Technology 11th Five-Year Plan(2008ZX09401)
文摘OBJECTIVE DL0410,one novel compound discovered inhigh throughput screening(HTS),was found to be a potent inhibitor for AChE and BuChE.Memory deficit mice model induced by scopolamine have been conducted to verify its effects on the improvement of memory deficit.In this study,the effects of DL0410 on inhibitingβ-amyloid(Aβ)aggregation and attenuating cognition and memory impairment of APP/PS1 mice were further investigated.METHODS Th-T binding test was used to determinethe effect of DL0410 on Aβ1-42 aggregation.In addition,locomotor test,object recognition test,step-down test,and Morris Water maze were performedto investigate the effect of DL0410 on the cognition and memoryfunctions of APP/PS1 mice.RESULTS In vitro results showed that DL0410(10and 30μmol·L-1)could inhibit significantly the monomer Aβ1-42 from aggregation,when incubated together with monomer Aβ1-42 for 24h(P<0.01).Several behavioral tests demonstrated that DL0410(10and 30mg·kg-1)could shortened latency time innavigation test(P<0.01),increased platform crossing-times in space probe test(P<0.05),and reduced the error times in step-down test(P<0.01).CONCLUSIONDL0410 could inhibit Aβaggregation in vitro and alleviate cognition and memory impairment of APP/PS1 mice,which make DL0410 apromising candidate for Alzheimer′s disease treatment.
