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相关概念视频

Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

Blood Studies for Cardiovascular System I: Cardiac Biomarkers

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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...
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Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers01:19

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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...
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相关实验视频

Updated: Jan 7, 2026

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生物标志物 生物标志物

Ondrej Lerch1, David Kala1, Zuzana Nedelska1

  • 1Charles University, Second Faculty of Medicine and Motol University Hospital, Prague, Czech Republic.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
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概括
此摘要是机器生成的。

血脑屏障 (BBB) 透性在阿尔茨海默病 (AD) 患者的基础前脑区域减少. 这一发现表明,BBB功能障碍可能会导致这个特定的大脑区域的早期AD病理.

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科学领域:

  • 神经科学是一个神经科学.
  • 放射学 放射学是指放射学
  • 生物标志物 生物标志物

背景情况:

  • 血脑屏障 (BBB) 功能障碍与阿尔茨海默病 (AD) 病原发生有关.
  • 动态对比增强磁共振成像 (DCE-MRI) 使用K-trans.等指标量化BBB分解.
  • 早期阿尔茨海默病受影响的区域包括海马体,内腔皮层 (EC) 和基底前脑 (BF).

研究的目的:

  • 通过使用DCE-MRI在早期AD中调查BBB功能障碍.
  • 为了比较认知正常 (CU) 个体和AD患者之间的海马,EC和BF中的BBB透性.
  • 评估BBB透性和AD生物标志物之间的关系.

主要方法:

  • 在43名参与者 (22个CU,21个AD) 上进行了DCE-MRI.
  • 使用帕特拉克算法生成K-trans地图.
  • 提取了海马,EC和BF的区域K-trans值,并使用ANCOVA进行分析.

主要成果:

  • 与CU个体相比,AD患者在总BF区域的K-trans平均值明显较低 (p=0.002).
  • 在BF中,基底核Meynerti的特定子区域在AD组中也表现出减少的K-trans.
  • 两组之间在海马体或EC中没有发现BBB透性的显著差异.

结论:

  • 这项研究显示,在患有轻度认知障碍或AD痴呆症的患者中,BBB透率在基底前脑内有区域性降低.
  • 在BF中这种局部BBB功能障碍可能是导致阿尔茨海默病早期病理变化的因素.
  • 需要进一步的研究来探索BF特异性BBB改变在AD的确切机制和影响.