相关实验视频
Updated: Jun 14, 2025

09:22
In Vitro Aggregation Assays Using Hyperphosphorylated Tau Protein
Published on: January 2, 2015
18.3K
阿尔茨海默病的种子形状配对螺旋状丝,但缺乏种子潜力
Pu Duan1, Aurelio J Dregni1, Hong Xu2
1Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
The Journal of biological chemistry
|August 30, 2024
概括
阿尔茨海默病的聚合物采用相同的结构,但不能自我传播. 除了结构之外,还需要额外的因素来使类传播在病变中.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生物化学
- 结构生物学 结构生物学
背景情况:
- 阿尔茨海默病 (AD) 和其他神经退行性疾病涉及病态的陶蛋白聚合.
- 陶聚合物通过大脑传播,这表明错误折叠的陶的模板.
研究的目的:
- 研究是否招募的采用了与播种相同的结构和特性.
- 为了确定在病变中的传播的结构基础.
主要方法:
- 使用AD脑衍生的tau种子进行重组全长0N3R和0N4Rtau的模板放大.
- 使用冷电子显微镜测定放大纤维的结构.
主要成果:
- 无细胞增强型纤维采用了与AD配对螺旋丝 (PHF) 相同的分子结构.
- 放大PHF的结构无法为进一步传播提供额外的单体模板.
结论:
- 仅PHF结构就不足以解释AD的病理性质和类传播.
- 其他因素,包括翻译后修改,同时发生的蛋白质和辅助因子,对于病的传播是必要的.
相关概念视频
Amyloid Fibrils
9.3K
Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
9.3K
Alzheimer's Disease: Overview
454
Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
454
Alzheimer's Disease: Treatment
170
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...
170

