生物标志物 生物标志物
1Yale School of Medicine, New Haven, CT, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
概括
大脑中的功能连接可以预测临床前阿尔茨海默病 (AD) 中的区域沉积. 这些预测确定了具有不同认知衰退率的不同患者群体,有助于早期AD分期.
科学领域:
- 神经成像是一种神经成像.
- 阿尔茨海默氏症疾病研究研究
- 在Connectomics上,我们提供了连接.
背景情况:
- 临床前阿尔茨海默氏症 (AD) 涉及粉样蛋白积累而没有认知症状.
- 在临床前阿尔茨海默病中观察到功能连接性改变,但它们对病理学的预测价值尚不清楚.
研究的目的:
- 使用基于连接组的预测建模 (CPM) 来利用功能连接来预测tau沉积.
- 在基于预测模型的临床前临床AD队列中确定临床上有意义的子组.
主要方法:
- 在A4研究队列中,CPM被用于从静止状态功能连接体预测基线tau PET.
- 模型在阿尔茨海默病神经成像计划 (ADNI) 队列中得到验证.
- 在预测网络边缘进行了分层分类,以识别子组,并比较了它们的纵向认知轨迹.
主要成果:
- 全大脑功能连接稳定地预测了区域性tau PET,表现优于粉样PET.
- 预测模型对ADNI队列进行了概括,特别是在具有高 tau的参与者中.
- 聚类揭示了两个不同的子组,一个表现出明显更快的认知衰退.
结论:
- 功能连接组适度预测AD频谱中的区域TAU PET.
- 预测性功能连接模式与认知轨迹相关,突出了它们在AD早期阶段化中的作用.
- 功能性连接性表明,在与其他生物标志物相结合时,有望增强早期阿尔茨海默氏症病期.
相关概念视频
01:20Blood Studies for Cardiovascular System I: Cardiac Biomarkers
746
Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
746
01:19Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers
511
Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
511