通过唐氏综合征解读阿尔茨海默病:从基因定义的人口的见解
Jason K Russell1, Zinayida Schlachetzki, Michael S Rafii
1Alzheimer's Therapeutic Research Institute, Keck School of Medicine of University of Southern California, San Diego, California, USA.
Current opinion in neurology
|February 19, 2026
概括
患有唐氏综合征 (DS) 的个人表现出可预测的阿尔茨海默病 (AD) 进展,为所有AD形式的早期检测和治疗提供了洞察力. 对DS-AD的研究加速了生物标志物验证和治疗开发.
科学领域:
- 神经学 神经学
- 遗传学 是一个遗传学.
- 生物标志物研究 生物标志物研究
背景情况:
- 唐氏综合征 (DS) 个体在40岁时总是会发展出阿尔茨海默氏病 (AD) 神经病理学.
- DS提供了一种基因定义的模型来研究AD的发病因子.
- 了解DS-AD可以为更广泛的阿尔茨海默病研究提供信息.
研究的目的:
- 在患有唐氏综合征 (DS) 个体中审查阿尔茨海默病 (AD).
- 检查DS-AD的遗传基础,流行病学,生物标志物轨迹和临床试验创新.
- 突出DS研究如何为更广泛的AD病变发生,早期检测和治疗策略提供信息.
主要方法:
- 纵向生物标志物研究 (例如,ABC-DS) 追踪粉样蛋白,蛋白和神经退行.
- 血和CSF生物标志物的分析 (Aβ42,p-tau,NfL,GFAP).
- 使用神经成像模式 (粉样/粉样PET,MRI) 进行早期变化检测.
主要成果:
- 在DS-AD中的生物标志物轨迹与临床分期一致,显示在痴呆症发生几十年前的早期变化.
- 修订后的阿尔茨海默病诊断标准现在包括从出生开始对DS个体的0期.
- 对比分析揭示了DS-AD,主导AD和零星AD之间的共同特征,但病理的时间/分布不同.
结论:
- DS-AD研究提供了对AD自然史,遗传驱动因素和治疗点的独特见解.
- 由于DS-AD的基因定义性质,因此可以更准确地确定病期和实施早期干预策略.
- 来自DS-AD研究的发现可以转化为零星和家族性AD,推进个性化治疗方法.
更多相关视频
相关概念视频
01:26Alzheimer's Disease: Overview
1.8K
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...
1.8K
01:17Karyotyping
68.8K
Overview
68.8K
01:29Intellectual Disability
824
Intellectual disability (ID) is a neurodevelopmental condition characterized by deficits in intellectual and adaptive functioning that manifest during the developmental period. This condition encompasses challenges in reasoning, memory, problem-solving, and learning, accompanied by impairments in everyday life skills, such as communication, self-care, and social interactions. Intellectual disability affects approximately 1% of the population in the United States, impacting an estimated 5...
824
01:22Alzheimer's Disease: Treatment
1.0K
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...
1.0K
01:11Genome-wide Association Studies-GWAS
15.8K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
15.8K
01:28Human Genetics
1.7K
Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
The complex relationship between genetics and psychology is observable through common biological components such...
1.7K