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Effects of P301L-TAU on post-translational modifications of microtubules in human iPSC-derived cortical neurons and TAU transgenic mice
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作者 Mohamed Aghyad Al Kabbani Christoph Köhler Hans Zempel 《Neural Regeneration Research》 SCIE CAS 2025年第8期2348-2360,共13页
TAU is a microtubule-associated protein that promotes microtubule assembly and stability in the axon.TAU is missorted and aggregated in an array of diseases known as tauopathies.Microtubules are essential for neuronal... TAU is a microtubule-associated protein that promotes microtubule assembly and stability in the axon.TAU is missorted and aggregated in an array of diseases known as tauopathies.Microtubules are essential for neuronal function and regulated via a complex set of post-translational modifications,changes of which affect microtubule stability and dynamics,microtubule interaction with other proteins and cellular structures,and mediate recruitment of microtubule-severing enzymes.As impairment of microtubule dynamics causes neuronal dysfunction,we hypothesize cognitive impairment in human disease to be impacted by impairment of microtubule dynamics.We therefore aimed to study the effects of a disease-causing mutation of TAU(P301L)on the levels and localization of microtubule post-translational modifications indicative of microtubule stability and dynamics,to assess whether P301L-TAU causes stability-changing modifications to microtubules.To investigate TAU localization,phosphorylation,and effects on tubulin post-translational modifications,we expressed wild-type or P301L-TAU in human MAPT-KO induced pluripotent stem cell-derived neurons(i Neurons)and studied TAU in neurons in the hippocampus of mice transgenic for human P301L-TAU(p R5 mice).Human neurons expressing the longest TAU isoform(2N4R)with the P301L mutation showed increased TAU phosphorylation at the AT8,but not the p-Ser-262 epitope,and increased polyglutamylation and acetylation of microtubules compared with endogenous TAU-expressing neurons.P301L-TAU showed pronounced somatodendritic presence,but also successful axonal enrichment and a similar axodendritic distribution comparable to exogenously expressed 2N4R-wildtype-TAU.P301L-TAU-expressing hippocampal neurons in transgenic mice showed prominent missorting and tauopathy-typical AT8-phosphorylation of TAU and increased polyglutamylation,but reduced acetylation,of microtubules compared with non-transgenic littermates.In sum,P301L-TAU results in changes in microtubule PTMs,suggestive of impairment of microtubule stability.This is accompanied by missorting and aggregation of TAU in mice but not in i Neurons.Microtubule PTMs/impairment may be of key importance in tauopathies. 展开更多
关键词 human induced pluripotent stem cell MICROTUBULES p301l pR5 mice TAU TAUOPATHY tubulin code
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P301L突变tau蛋白转基因动物模型及其应用 被引量:6
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作者 马登磊 张如意 李林 《中国比较医学杂志》 CAS 北大核心 2018年第1期123-128,共6页
微管相关蛋白tau在阿尔茨海默病(Alzheimer’s disease,AD)等多个tau蛋白病(tauopathies)的发病机制中发挥重要的作用,并且得到了越来越多的关注。在tau蛋白病的研究中,理想的tau蛋白病变模型对于发病机制和药物治疗的研究具有重要的意... 微管相关蛋白tau在阿尔茨海默病(Alzheimer’s disease,AD)等多个tau蛋白病(tauopathies)的发病机制中发挥重要的作用,并且得到了越来越多的关注。在tau蛋白病的研究中,理想的tau蛋白病变模型对于发病机制和药物治疗的研究具有重要的意义。目前国内外学者已经建立了多个tau蛋白转基因动物模型,其中过表达P301L突变tau蛋白的动物模型因具有明显的病理改变而得到广泛的应用。本文综述了P301L突变tau蛋白转基因动物模型的病理表现及在药理研究中应用的新进展。 展开更多
关键词 p301l突变 TAU蛋白 转基因小鼠 阿尔茨海默病 tau蛋白病
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转人P301L突变tau基因小鼠学习记忆功能与与脑内NO的改变 被引量:1
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作者 高婧玮 虞立霞 +5 位作者 洪燕 牛超 陈媛 汪雪兰 陈汝筑 汪海 《中国应用生理学杂志》 CAS CSCD 2015年第5期385-389,共5页
目的:探究第十代转人P301L突变tau基因小鼠(F10)学习记忆障碍的机制。方法:Western blot法检测F10代小鼠人tau蛋白的表达与tau蛋白磷酸化水平的改变;Bielshowsky法银染脑片显示神经纤维缠结;旷场实验与避暗实验检测小鼠学习记忆能力的... 目的:探究第十代转人P301L突变tau基因小鼠(F10)学习记忆障碍的机制。方法:Western blot法检测F10代小鼠人tau蛋白的表达与tau蛋白磷酸化水平的改变;Bielshowsky法银染脑片显示神经纤维缠结;旷场实验与避暗实验检测小鼠学习记忆能力的改变。比色法检测小鼠全脑乙酰胆碱水平,胆碱乙酰转移酶活性与胆碱酯酶活性变化;硝酸还原酶法检测小鼠全脑一氧化氮水平的改变。结果:转人P301L突变tau基因小鼠可表达外源人tau蛋白,3月龄小鼠大脑皮层和海马中出现tau蛋白磷酸化水平明显升高及7月龄小鼠皮层形成神经纤维缠结和出现学习记忆障碍;转人P301L突变tau基因小鼠全脑乙酰胆碱水平,胆碱酯酶活性和胆碱乙酰转移酶活性及表达均未见明显改变;但该小鼠全脑一氧化氮水平却明显下降。结论:F10代转人P301L突变tau基因小鼠仍可遗传亲本性状,7月龄小鼠同时出现学习记忆障碍与全脑一氧化氮含量明显下降的现象,提示转人P301L突变tau基因小鼠全脑一氧化氮含量下降可能涉及其学习记忆障碍机制。 展开更多
关键词 tau基因 p301l突变 转人tau基因小鼠 一氧化氮 胆碱能系统
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