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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...
749
Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers01:19

Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers

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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

Xi Wu1, Bing Zhang2

  • 1Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China, Nanjing, Jiangsu, China.

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

初级嗅觉皮层 (POC) 的嗅觉适应模式在主观认知衰退 (SCD) 和轻度认知障碍 (MCI) 中发生变化,表明早期阿尔茨海默病 (AD) 的变化. 这些嗅觉变化与认知功能和AD生物标志物升高有关.

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科学领域:

  • 神经科学是一个神经科学.
  • 认知科学 认知科学
  • 生物标志物研究 生物标志物研究

背景情况:

  • 阿尔茨海默病 (AD) 与主要嗅觉皮层 (POC) 激活的改变有关.
  • 在轻度认知障碍 (MCI) 和AD中观察到受损的嗅觉习惯.
  • 主观认知衰退 (SCD) 中的嗅觉适应仍未得到充分研究.

研究的目的:

  • 研究SCD患者的嗅觉适应模式.
  • 为了比较正常认知 (NC),SCD和MCI组的嗅觉适应.
  • 探索嗅觉适应,认知功能和等离子体生物标志物之间的关系.

主要方法:

  • 功能性MRI (fMRI) 对181名参与者 (NC,SCD,MCI) 的四个气味度和四个时间阶段的POC激活进行了分析.
  • 参与者根据正常或异常的POC嗅觉适应模式进行分类.
  • 在适应组之间比较了p-tau217和NfL的血水平.

主要成果:

  • 与NC相比,SCD和MCI组显示活化的POC声细胞显著减少.
  • NC参与者主要表现出正常的嗅觉适应,而SCD和MCI参与者显示出异常模式.
  • 异常的嗅觉适应与较差的嗅觉识别,记忆缺陷和较高的血p-tau217和NfL水平有关.

结论:

  • 嗅觉适应模式在阿尔茨海默病的早期阶段是相关的,特别是在SCD.
  • 改变的POC嗅觉适应可以作为AD的早期指标.
  • 嗅觉功能变化与认知衰退和AD病理学有关.