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Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

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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:
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Updated: Jan 7, 2026

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

Ling Guo1, Baolian Dong1, Chao Song1

  • 1Anning First People's Hospital Affiliated to Kunming University of Science and Technology, Kunming, Anning, Yunnan, China.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
PubMed
概括
此摘要是机器生成的。

鼻内注射SiO2纳米粒子 (SiNPs) 可能通过损伤大脑增加阿尔茨海默病 (AD) 风险. 在小鼠中,SiNPs改变了AD生物标志物和亡蛋白,表明即使在健康个体中也存在神经毒性.

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科学领域:

  • 神经科学是一个神经科学.
  • 毒理学 毒理学 毒理学
  • 生物化学 生物化学

背景情况:

  • 阿尔茨海默病 (AD) 是一种进展性神经退行性疾病.
  • 二氧化纳米颗粒 (SiNPs) 对大脑健康的潜在神经毒性影响尚未完全理解.
  • 调查SiNPs暴露和AD病原体之间的联系至关重要.

研究的目的:

  • 为了确定SiNPs是否会增加阿尔茨海默病的风险或加剧现有的AD脑损伤.
  • 在小鼠模型中评估鼻内SiNPs给药对AD生物标志物和亡途径的影响.
  • 在野生型 (WT) 和转基因AD小鼠模型中评估SiNPs的神经毒性潜力.

主要方法:

  • 通过鼻内灌注 (INI) 对WT和TgAPP/PS1/tau小鼠进行了28天的SiNP注射.
  • 阿尔茨海默病的生物标志物 (Aβ,BACE1,tau) 和与亡相关的蛋白质 (caspase-3,裂开的caspase-3,Bax) 在大脑皮层中使用西欧斑块测量.
  • 血液血清中APP,PS1和tau的mRNA水平使用RT-qPCR进行了分析.

主要成果:

  • 暴露于SiNPs显著增加了WT和AD小鼠的大脑皮层中的粉样蛋白β (Aβ) 和BACE1蛋白水平.
  • 在INI后,在WT小鼠中,APP,PS1和tau的mRNA水平以度依赖的方式升高.
  • 切割的caspase-3和Bax在两种小鼠类型中都显示出调节,这表明SiNP会诱导细胞亡和神经元损伤.

结论:

  • 鼻内输送的SiNP可以快速到达大脑,破坏大脑皮层的完整性.
  • SiNP改变了参与AD病变,亡和神经元损伤的蛋白质的表达.
  • 这些发现表明SiNPs具有显著的神经毒性风险,甚至在非AD个体中也可能导致AD发展.