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Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

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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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Dried Blood Spot Collection of Health Biomarkers to Maximize Participation in Population Studies
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生物标志物 生物标志物

Averi Giudicessi1,2, Elouise A Koops2,3,4, Nikole A Bonillas Félix2

  • 1Boston University, Boston, MA, USA.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
PubMed
概括
此摘要是机器生成的。

老年拉丁裔的白质完整性随着年龄的增长而下降,在时间通路中观察到性别特异性差异. 这种下降与认知表现有关,这表明扩散指标可以预测早期的神经退行.

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科学领域:

  • 神经成像是一种神经成像.
  • 老年学是一门学科.
  • 认知神经科学 认知神经科学

背景情况:

  • 白质的恶化是神经退行性疾病的早期指标,通常在认知症状之前.
  • 大脑管道易受早期病理变化的影响,影响区域间的沟通.
  • 了解老年人群中早期的神经退行至关重要.

研究的目的:

  • 在社区居住的老拉丁裔中检查白质微观结构与认知表现的关系.
  • 为了确定与年龄相关的变化和白质完整性的性别特异性差异.
  • 探索扩散指标作为认知衰退早期生物标志物的潜力.

主要方法:

  • 扩散权重成像 (DWI) 用于评估122名未受损的老拉丁裔成年人的白质微观结构.
  • 对于10个主要的白质区域,提取了分数异构性 (FA) 和平均扩散性 (MD).
  • 全球认知表现 (MMSE) 被测量,对年龄,性别和教育进行回归分析.

主要成果:

  • 在下部和上部纵向囊中发现了与年龄相关的FA减少.
  • 增加的MD被观察到在前面的thalamic辐射,下面的前后带,和环膜环膜圈.
  • 认知表现与海马环带白质完整性相关;在上纵向囊中注意到性别差异.

结论:

  • 白质完整性容易受到与年龄相关的衰退的影响,在时间路径上有显著的性别特异性差异.
  • 扩散指标,特别是在海马环膜,显示潜在的早期生物标志物认知衰退.
  • 这些发现增强了对拉丁裔人口认知衰老机制的理解,以及与年龄相关的大脑完整性的变化.