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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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生物标志物 生物标志物

Shuhua Ren1, Xiaoxie Mao2, Qi Huang3

  • 1Huashan Hospital, Shanghai, China.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
PubMed
概括

血液中的神经纤维光链 (NfL) 可以预测主观认知衰退 (SCD) 患者的认知衰退. 这一发现为早期诊断认知障碍提供了潜在的可能性.

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科学领域:

  • 神经学 神经学
  • 生物标志物 生物标志物
  • 认知科学 认知科学

背景情况:

  • 主观认知衰退 (SCD) 是痴呆症的前体.
  • 确定可靠的生物标志物用于早期诊断和预后至关重要.

研究的目的:

  • 在SCD中调查血液生物标志物 (ATN:粉样蛋白,,神经退行) .
  • 检查血液生物标志物,粉样沉积物和认知功能之间的关系.
  • 评估血液生物标志物的预测SCD纵向认知变化的能力.

主要方法:

  • 321名参与者 (246名SCD,75名对照) 接受了认知测试和粉样蛋白PET成像.
  • 血液样本分析了Aβ42,Aβ40,p-Tau181,t-Tau,以及NfL.
  • 2年后对95名受试者进行后续认知评估.
  • 统计分析包括t测试,ROC曲线,相关性和一般线性模型.

主要成果:

  • 血液中的p-Tau181/Aβ42比率与粉样沉积相关.
  • 血液p-Tau181和NfL与特定的认知领域 (记忆,执行功能,语言) 有关.
  • 血基NfL水平在2年内显著预测SCD患者的认知衰退.

结论:

  • 血液p-Tau181/Aβ42与SCD中的粉样病理有关.
  • 血液NfL是SCD未来认知衰退的有希望的预测因素.
  • 这些发现支持血液生物标志物在SCD早期诊断和监测方面的潜力.