相关实验视频

Updated: Mar 1, 2026

A11-positive β-amyloid Oligomer Preparation and Assessment Using Dot Blotting Analysis

A11-positive β-amyloid Oligomer Preparation and Assessment Using Dot Blotting Analysis

Published on: May 22, 2018

3-desoxycollinoketone B的合成及其降低与阿尔茨海默症相关的错误折叠蛋白质的能力

Seongrok Heo¹, Minhae Cha², Wonho Zhung¹

¹Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon, Republic of Korea.

Nature communications

|February 27, 2026

概括

一种新的Collinolactone衍生物,3-desoxycollinoketone B,有效地抑制了粉样蛋白-β和陶聚合. 这种化合物对阿尔茨海默氏症有很大的前景.

科学领域:

自然产品的合成自然产品的合成
药用化学医学化学
神经科学是一个神经科学.

背景情况:

科利诺拉克是一种具有独特三环核的天然产品,通过破坏粉样蛋白β (Aβ) 和聚变,显示出对阿尔茨海默病 (AD) 治疗的潜力.
科利诺拉克顿天然来源的挑战和有限的药理动力学阻碍了其治疗发展.
Aβ和tau病理是阿尔茨海默病的关键特征和治疗点.

研究的目的:

设计,合成和评估3-desoxycollinoketone B,一种具有改善AD治疗药物动力学特性的新型collinolactone衍生物.
通过计算和体外 (in vitro) 方法,研究3-desoxycollinoketone B对Aβ和tau聚合物的结合亲和力和作用机制.
在阿尔茨海默氏病的临床前模型中评估3-desoxycollinoketone B的治疗疗效.

主要方法:

三环核心的可扩展合成通过立体选择性跨环 [6+4] 循环添加.
通过人工智能辅助的分子对接和模拟来预测与Aβ和tau的结合相互作用.
在体外测试以评估Aβ和纤维的抑制和解离.
在阿尔茨海默病小鼠模型中的体内研究,以评估认知功能和神经病理学.

主要成果:

成功合成了3-desoxycollinoketone B,具有稳定的三环核.
计算研究预测,3-desoxycollinoketone B与Aβ和tau聚合物相比,与collinolactone相比,与拟议的纤维细胞不稳定机制相比,它具有更好的结合性.
试验室结果证实了该衍生品对Aβ和纤维的抑制和解离.
在AD小鼠模型中的体内给药导致认知功能的显著改善和Aβ/tau病理的减少.

结论:

3-desoxycollinoketone B代表了阿尔茨海默病的有希望的治疗候选者,提供了改善的药理动力学和强大的抗粉样蛋白和抗tau聚合活性.
合成可访问性和在临床前模型中证明的有效性支持进一步开发这种用于AD治疗的氨酸衍生物.
这项研究强调了基于天然产品的合理药物设计的潜力,以解决复杂的神经退行性疾病.

更多相关视频

Modified Roller Tube Method for Precisely Localized and Repetitive Intermittent Imaging During Long-term Culture of Brain Slices in an Enclosed System

Modified Roller Tube Method for Precisely Localized and Repetitive Intermittent Imaging During Long-term Culture of Brain Slices in an Enclosed System

Published on: December 28, 2017

Preparation of Oligomeric β-amyloid1-42 and Induction of Synaptic Plasticity Impairment on Hippocampal Slices

Preparation of Oligomeric β-amyloid1-42 and Induction of Synaptic Plasticity Impairment on Hippocampal Slices

Published on: July 14, 2010

相关概念视频

Amyloid Fibrils

Amyloid Fibrils

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,...

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...

α-Hydroxy Ketones via Reductive Coupling of Esters: Acyloin Condensation Overview

α-Hydroxy Ketones via Reductive Coupling of Esters: Acyloin Condensation Overview

The pinacol and McMurry reactions involve the reductive coupling of ketones or aldehydes. Similarly, the bimolecular reductive coupling of two ester molecules in the presence of sodium metal in an aprotic solvent yields an α-hydroxy ketone product. The α-hydroxy ketone is also called acyloin, so the reaction is referred to as ‘acyloin condensation.’

Aldol Condensation with β-Diesters: Knoevenagel Condensation

Aldol Condensation with β-Diesters: Knoevenagel Condensation

The Knoevenagel condensation is an aldol-type reaction involving the condensation of aldehydes or ketones with active methylene compounds such as β-diesters to produce substituted olefins.

Alcohols from Carbonyl Compounds: Reduction

Alcohols from Carbonyl Compounds: Reduction

Reduction is a simple strategy to convert a carbonyl group to a hydroxyl group. The three major pathways to reduce carbonyls to alcohols are catalytic hydrogenation, hydride reduction, and borane reduction.
Catalytic hydrogenation is similar to the reduction of an alkene or alkyne by adding H2 across the pi bond in the presence of transition metal catalysts like Raney Ni, Pd–C, Pt, or Ru. Aldehydes and ketones can be reduced by this method, often under mild to moderate heat (25–100°C) and...

Preparation of Aldehydes and Ketones from Carboxylic Acid Derivatives

Preparation of Aldehydes and Ketones from Carboxylic Acid Derivatives

Aldehydes are more reactive than carboxylic acids and hence, can get over-reduced to alcohol in the presence of strong reducing agents. Therefore, carboxylic acids are inefficient in preparing aldehydes using LAH.
Carboxylic acid derivatives like acid chlorides and esters are more easily reducible than the corresponding acids. The derivatives reduce in the presence of mild reducing agents to give aldehydes. Aldehydes can also be prepared by Rosenmund reduction, that is, the reduction of...