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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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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

Daniel C Bowie1,2, Yara Yakoub2,3,4, Valentin Ourry2,4

  • 1McGill University, Montreal, QC, Canada.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 26, 2025
PubMed
概括
此摘要是机器生成的。

阿尔茨海默病 (AD) 病理学,由粉样蛋白和 (A / T) 标记物表示,与嗅觉识别能力的下降有关. 这项研究证实,A/T阳性预示着随着时间的推移,嗅觉功能的恶化.

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科学领域:

  • 神经科学是一个神经科学.
  • 神经学 神经学
  • 生物标志物 生物标志物

背景情况:

  • 之前的研究将脑脊液p-tau181与嗅觉和听觉障碍联系起来.
  • 对于神经感官衰退的阿尔茨海默病 (AD) 病理学的预测价值尚未得到充分理解.

研究的目的:

  • 研究粉样蛋白和 (A/T) 状态和神经感官功能 (气味识别和中央听觉处理) 之间的横截面和纵向关系.
  • 用PET成像和基于等离子体的A/T生物标志物验证发现.

主要方法:

  • 来自PREVENT-AD队列的233名参与者接受了粉样蛋白和蛋白PET扫描,气味识别 (UPSIT) 和中央听觉处理 (DSI) 测试.
  • 血生物标志物 (Aβ42,Aβ40,p-tau217) 在一个子集 (n=208) 中进行了分析.
  • 统计分析包括Kruskal-Wallis,Dunn的测试和线性混合效应模型,以评估群体差异和纵向变化.

主要成果:

  • 基于PET的分析显示,与粉素阳性/阴性 (A+T-) 个体相比,粉素阴性/阴性 (A-T-) 个体的气味识别 (OI) 分数较低.
  • 基于等离子体的分类显示,与A+T和A-T-.相比,粉样蛋白阳性/tau阳性 (A+T+) 个体的OI得分较低.
  • 从长度来看,在A+T+组中观察到OI的最显著下降,特别是在使用血生物标志物时.

结论:

  • 阿尔茨海默病的病理学,特别是粉样蛋白和 (A + T +) 的存在,与嗅觉识别的下降有关.
  • 进一步的研究应该探索这些关联在其他神经感官领域,如视觉和味觉.