Autism Spectrum Disorder(ASD)is marked by early-onset neurodevelopmental anomalies,yet the tem-poral dynamics of genetic contributions to these processes remain insufficiently understood.This study aimed to elu-cidate...Autism Spectrum Disorder(ASD)is marked by early-onset neurodevelopmental anomalies,yet the tem-poral dynamics of genetic contributions to these processes remain insufficiently understood.This study aimed to elu-cidate the role of the Shank3 gene,known to be associated with monogenic causes of autism,in early developmental processes to inform the timing and mechanisms for poten-tial interventions for ASD.Utilizing the Shank3B knockout(KO)mouse model,we examined Shank3 expression and its impact on neuronal maturation through Golgi staining for dendritic morphology and electrophysiological recordings to measure synaptic function in the anterior cingulate cortex(ACC)across different postnatal stages.Our longitudinal analysis revealed that,while Shank3B KO mice displayed normal neuronal morphology at one week postnatal,signifi-cant impairments in dendritic growth and synaptic activity emerged by two to three weeks.These findings highlight the critical developmental window during which Shank3 is essential for neuronal and synaptic maturation in the ACC.展开更多
目的观察5肽类似物165对老年性痴呆(Alzhei mer disease,AD)模型大鼠学习记忆能力及突触后致密区蛋白95(postsynaptic density95,PSD95)和骨架蛋白Shank1表达的影响。方法将45只大鼠随机分为正常对照组、模型组和5肽类似物165治疗组,模...目的观察5肽类似物165对老年性痴呆(Alzhei mer disease,AD)模型大鼠学习记忆能力及突触后致密区蛋白95(postsynaptic density95,PSD95)和骨架蛋白Shank1表达的影响。方法将45只大鼠随机分为正常对照组、模型组和5肽类似物165治疗组,模型组和治疗组大鼠按体重3mg/kg行双侧侧脑室链脲佐菌素(streptozotocin,STZ)注射,第3天重复注射建立AD模型,对照组以人工脑脊液代替STZ。术后21d治疗组按体重0.34mg/(kg.d)给予APP5肽类似物165灌胃干预,其余两组以蒸馏水代替。3周后应用Morris水迷宫、免疫组织化学和Western blotting方法检测大鼠的学习记忆能力及PSD95和Shank1的表达。结果5肽类似物165治疗组大鼠的平均游泳时间较模型组明显缩短(P<0.01),且海马PSD95和Shank1阳性神经细胞数及PSD95和Shank1蛋白表达较模型组明显增加(P<0.05)。结论5肽类似物165可显著提高大鼠学习记忆能力,增加大鼠海马PSD95和Shank1表达,表明其对突触功能和可塑性具改善作用。展开更多
基金supported by the Natural Science Foundation of Anhui Province,China(No.2408085MH189)the Scientific Research Program of University in Anhui Province,China(No.2024AH051017,KJ2021A0202)+4 种基金the Training Program for Young and Middle-aged Teachers in University of Anhui Province,China(No.YQYB2024031)the Clinical Science Research Project of the First Affiliated Hospital of Anhui University of Chinese Medicine(No.2021yfylc14)the Biomedical Basic Applied Science and Technology Public Service Platform of Large-scale Instruments and Equipment Open Fund of Anhui Province,China(No.2023-04)the Students'Innovation and Entrepreneurship Training Program of Anhui Province,China(No.S202410366078)the Scientific Research Platform and Base Upgrading Plan of Anhui Medical University(No.2021xkjT048)。
基金supported by the Natural Science Foundation of China(32394032,82201699,and 82221001)the Natural Science Foundation of Zhejiang Province(LTGD24H250001)+1 种基金the Kay R&D Program of Shaanxi Province(2023-YBSF-093),the Young Talent Fund of University Association for Science and Technology in Shaanxi(20220306)the Joint Founding Project of Innovation Research Institute,Xijing Hospital(LHJJ24JH02).
文摘Autism Spectrum Disorder(ASD)is marked by early-onset neurodevelopmental anomalies,yet the tem-poral dynamics of genetic contributions to these processes remain insufficiently understood.This study aimed to elu-cidate the role of the Shank3 gene,known to be associated with monogenic causes of autism,in early developmental processes to inform the timing and mechanisms for poten-tial interventions for ASD.Utilizing the Shank3B knockout(KO)mouse model,we examined Shank3 expression and its impact on neuronal maturation through Golgi staining for dendritic morphology and electrophysiological recordings to measure synaptic function in the anterior cingulate cortex(ACC)across different postnatal stages.Our longitudinal analysis revealed that,while Shank3B KO mice displayed normal neuronal morphology at one week postnatal,signifi-cant impairments in dendritic growth and synaptic activity emerged by two to three weeks.These findings highlight the critical developmental window during which Shank3 is essential for neuronal and synaptic maturation in the ACC.
文摘目的观察5肽类似物165对老年性痴呆(Alzhei mer disease,AD)模型大鼠学习记忆能力及突触后致密区蛋白95(postsynaptic density95,PSD95)和骨架蛋白Shank1表达的影响。方法将45只大鼠随机分为正常对照组、模型组和5肽类似物165治疗组,模型组和治疗组大鼠按体重3mg/kg行双侧侧脑室链脲佐菌素(streptozotocin,STZ)注射,第3天重复注射建立AD模型,对照组以人工脑脊液代替STZ。术后21d治疗组按体重0.34mg/(kg.d)给予APP5肽类似物165灌胃干预,其余两组以蒸馏水代替。3周后应用Morris水迷宫、免疫组织化学和Western blotting方法检测大鼠的学习记忆能力及PSD95和Shank1的表达。结果5肽类似物165治疗组大鼠的平均游泳时间较模型组明显缩短(P<0.01),且海马PSD95和Shank1阳性神经细胞数及PSD95和Shank1蛋白表达较模型组明显增加(P<0.05)。结论5肽类似物165可显著提高大鼠学习记忆能力,增加大鼠海马PSD95和Shank1表达,表明其对突触功能和可塑性具改善作用。
