生物标志物 生物标志物
Aldana Lizarraga1, Michalis Kassinopoulos1, José María González-de-Echávarri1,2,3
1Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
概括
在没有认知障碍的个体中,阿尔茨海默病 (AD) 生物标志物如Aβ42/40和p-tau181会影响大脑网络连接. 特定的网络模式可能有助于保持认知功能,尽管早期的AD病理.
科学领域:
- 神经科学是一个神经科学.
- 大脑的连接性 大脑的连接性
- 阿尔茨海默氏症疾病研究研究
背景情况:
- 在早期阿尔茨海默病 (AD) 中观察到改变静止状态功能连接 (RSFC).
- 来自RSFC网络的图表指标提供了对大脑组织的见解,但它们在早期AD功能障碍中的作用未得到充分研究.
- 网络指标,AD生物标志物和认知衰退之间的关系需要进一步研究.
研究的目的:
- 调查脑脊液 (CSF) AD生物标志物与认知不受损 (CU) 个体的大脑网络图表指标之间的关联.
- 在网络指标上探索CSF生物标志物,性别和年龄之间的相互作用.
- 检查这些相互作用对纵向认知变化的影响.
主要方法:
- 分析了来自326个CU个体 (ALFA队列) 的RSFC数据.
- 对CSF Aβ42,Aβ40和p-tau181水平的评估.
- 从218个大脑区域的图表指标 (APL,LE,BC,CC,强度) 的计算,使用大脑图谱.
- 线性回归模型和与认知测量 (PACC) 的相互作用分析.
主要成果:
- 在背部注意网络 (DAN) 中,CSF Aβ42/40和p-tau181正面影响了中间中心性 (BC).
- Aβ42/40和性别之间的相互作用影响了平均路径长度 (APL),接近中心性 (CC) 和默认模式网络 (DMN) 的强度.
- Aβ42/40和DMN图表指标 (APL,LE,CC) 之间的相互作用预测了认知表现 (PACC) 的变化.
结论:
- 溶性粉样蛋白-β和p-tau对CU个体的DAN信息流有相反的影响.
- 较低的DMN整合和中心性可能会在早期AD病理存在时支持认知性.
- 网络拓在早期的AD中起着至关重要的作用,有可能识别认知性干预的目标.
相关概念视频
01:20Blood Studies for Cardiovascular System I: Cardiac Biomarkers
749
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...
749
01:19Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers
516
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...
516