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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

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生物标志物 生物标志物

Giulia Rugarli1,2, Giordano Cecchetti3, Roberto Santangelo3

  • 1Vita-Salute San Raffaele University, Milan, Italy.

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

光学连贯断层扫描 (OCT) 视网膜测量显示了与阿尔茨海默病 (AD) 中的血生物标志物复杂的关联. 视网膜厚度的变化与粉样蛋白和状况相关,这表明OCT是AD诊断和监测的潜在补充生物标志物.

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科学领域:

  • 神经科学是一个神经科学.
  • 眼科医生 眼科 眼科
  • 生物标志物发现发现

背景情况:

  • 阿尔茨海默病 (AD) 是一种神经退行性疾病,其特征是认知能力下降和蛋白质积累.
  • 光学连贯断层扫描 (OCT) 为潜在的AD生物标志物提供非侵入性视网膜成像.
  • 像β-粉样蛋白比率,化 (p-tau) 和神经纤维光链 (NfL) 等等离子体生物标志物有助于AD的诊断和监测.

研究的目的:

  • 在患有认知障碍的患者中,研究通过OCT测量的视网膜厚度和血生物标志物之间的关系.
  • 确定视网膜层厚度的变化是否与与阿尔茨海默病病理学相关的特定血生物标志物相关.
  • 通过根据粉样蛋白病理状态对患者进行分层来探索特定阶段的关联.

主要方法:

  • 一项对145名患有认知障碍的患者进行的横截面研究,这些患者接受了OCT和血生物标志物分析.
  • 线性回归模型评估了视网膜层厚度与血生物标志物之间的关联,并对共变量进行调整.
  • 根据pTau217水平,患者被分为三组,以对粉样蛋白病理状态进行分类.

主要成果:

  • 在整个队列中,发现时间视网膜神经纤维层 (T_RNFL) 厚度和β-粉样蛋白42/40比率 (Ab42/40) 之间存在正相关性.
  • 具体相关性因粉样蛋白状况组而异,包括较低RNFL (I_RNFL) 与Ab42/40或NfL之间的关联,以及全球RNFL (G_RNFL),高级RNFL (S_RNFL) 和状细胞层 (GCL-IPL) 与粉样蛋白阳性组中的化tau 181 (p181) 之间的关联.
  • 没有观察到显著的集团间差异.

结论:

  • 来自OCT的视网膜测量显示了阿尔茨海默病的补充生物标志物的潜力.
  • 研究结果表明,视网膜厚度和血生物标志物之间存在复杂的,特定阶段的关系.
  • 根据粉样蛋白状况分层对于理解这些关联至关重要,并可能为AD诊断和监测策略提供信息.