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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...
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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

Simonetta Falzoni1, Mario Tarantini1, Nelly Redolfi2

  • 1University of Ferrara, FERRARA, Ferrara, Italy.

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。

细胞外ATP (eATP) 在阿尔茨海默氏症 (AD) 中促进神经炎症. 在轻度认知障碍 (MCI) 中血分泌P2X7受体 (sP2X7R) 水平升高表明它可能是AD进展的早期生物标志物.

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科学领域:

  • 神经科学是一个神经科学.
  • 免疫学 免疫学 免疫学
  • 生物化学 生物化学

背景情况:

  • 神经炎症是阿尔茨海默病 (AD) 的关键因素,由大脑中细胞外ATP (eATP) 的升高维持.
  • P2X7受体 (P2X7R) 是eATP的受体,由免疫细胞表达,并激活NLRP3炎症体,释放炎症介质.
  • 已经确定了P2X7R (sP2X7R) 的血分泌形式,并发现在炎症条件下升高.

研究的目的:

  • 用新型发光探针测量AD小鼠模型大脑中的eATP水平.
  • 研究AD小鼠大脑中P2X7R,NLRP3和炎症性细胞因子的表达.
  • 为了确定人类血样本中的sP2X7R水平是否升高,这些样本来自轻度认知障碍 (MCI) 和AD患者.

主要方法:

  • 在AD小鼠模型中测量了细胞外ATP (eATP) 大脑水平,使用pmeLUC发光探针通过逆轨道鼻注射进行测量.
  • 在皮层同质体中量化了P2X7R,NLRP3和炎症性细胞因子 (IL-1β,IL-6,TNF-α) 的水平.
  • 血sP2X7R度通过ELISA测量在健康对照组 (HC),MCI患者和AD患者中.

主要成果:

  • 与年龄相匹配的对照小鼠相比,在AD小鼠的大脑中检测到显著更高的eATP水平,早在2个月大时就明显,在Aβ斑块沉积之前.
  • 细胞因子概况表明,神经炎症伴随着AD的进展,并且在Aβ斑块沉积之前开始.
  • 与HC受试者相比,MCI患者的sP2X7R度显著增加. 阿尔茨海默病患者的sP2X7R比对照组更高,但没有达到统计学意义.

结论:

  • 这些发现强烈支持eATP对阿尔茨海默病中神经炎症的贡献.
  • 血流体P2X7R (sP2X7R) 是一个有前途的生物标志物,可用于识别可能进展为痴呆症的认知障碍的早期阶段.
  • 这项研究由治疗阿尔茨海默病基金资助.