相关实验视频

Updated: Jun 19, 2025

In Vitro Aggregation Assays Using Hyperphosphorylated Tau Protein

In Vitro Aggregation Assays Using Hyperphosphorylated Tau Protein

Published on: January 2, 2015

二甲美西宁促进tau O-GlcNAcylation,并在hTau转基因小鼠中改善认知功能

Lei Xia¹, Junjie Li¹, Yayan Pang¹

¹Pediatric Research Institute, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, Chongqing Key Laboratory of Child Neurodevelopment and Cognitive Disorders, Children's Hospital of Chongqing Medical University, Chongqing 400014, China.

Progress in neuro-psychopharmacology & biological psychiatry

|July 25, 2024

概括

狄氏甲胺素 (DHA) 通过增强TAU O-链接-N-乙葡萄糖化 (O-GlcNAcylation) 来表现出对陶病的神经保护作用. 这种治疗改善了小鼠的突触和认知功能,通过促进O-GlcNAcylation和减少Tau过酸化.

科学领域:

神经科学是一个神经科学.
生物化学生化学
药理学药理学是指药理学的学科.

背景情况:

陶病症与高酸化陶 (P-tau) 积累有关.
在tau模型中,二甲胺素 (DHA) 已经显示出先前的神经保护作用.
需要澄清DHA通过Tau O-GlcNAcylation对突触和认知功能的特定机制.

研究的目的:

在人类Tau (hTau) 转基因小鼠模型中研究DHA对Tau O-linked-N-Acetylglucosaminylation (O-GlcNAcylation) 的作用.
为了确定DHA是否可以改善与陶病相关的突触和认知缺陷.
阐明DHA神经保护作用背后的分子机制.

主要方法:

利用hTau转基因小鼠作为一个最佳的病症模型.
接受了DHA治疗,并评估了海马体的CA1长期增强 (LTP).
使用巴恩斯迷宫和上下文恐惧条件测试评估空间学习和记忆.
研究的Tau O-GlcNAcylation和高酸化水平.
进行了分子对接,以评估DHA与O-GlcNAc转移酶 (OGT) 的结合.
分析了OGT表达和亚细胞局部化 (核出口).

主要成果:

在hTau小鼠中,DHA治疗缓解了海马体CA1 LTP缺陷,并改善了空间学习和记忆.
DHA增加了Tau O-GlcNAcylation的调节,并减弱了Tau的高酸化.
分子对接揭示了DHA和OGT之间的稳定结合.
DHA促进了OGT核出口,增强了OGT介导的Tau O-GlcNAcylation,但没有改变OGT的表达.

结论:

在病模型中,DHA通过促进OGT的细胞质转移来发挥神经保护作用.
这种机制重建了Tau O-GlcNAcylation/phosphorylation的平衡,增强了Tau的O-GlcNAcylation.
DHA代表了治疗病的潜在治疗剂.

关键词:

细胞质转位转位是细胞质转位.这是一种二甲胺氨酸.这是一种O-GlcNAcylation.其他 OGT 产品.酸化是指酸化的方法.塔乌·塔乌 (Tau Tau) 是一个

更多相关视频

Using Enzyme-based Biosensors to Measure Tonic and Phasic Glutamate in Alzheimer's Mouse Models

Using Enzyme-based Biosensors to Measure Tonic and Phasic Glutamate in Alzheimer's Mouse Models

Published on: May 3, 2017

A Technique for Serial Collection of Cerebrospinal Fluid from the Cisterna Magna in Mouse

A Technique for Serial Collection of Cerebrospinal Fluid from the Cisterna Magna in Mouse

Published on: November 10, 2008

相关概念视频

Alzheimer's Disease: Treatment

Alzheimer's Disease: Treatment

Alzheimer's Disease (AD), a neurodegenerative disorder, is pathologically identified by amyloid plaques and neurofibrillary tangles composed of tau protein. AD pharmacotherapy aims to manage cognitive symptoms, delay disease progression, and treat behavioral symptoms. The treatment is primarily symptomatic and palliative, with no definitive disease-modifying therapy available. Cholinesterase inhibitors, including donepezil (Aricept), rivastigmine (Exelon), and galantamine (Razadyne), are...