生物标志物 生物标志物
Marta Casquero-Veiga1,2, Carlos Ceron2, Nicolás Lamanna-Rama2,3
1Instituto de Investigación Sanitaria Fundación Jiménez Díaz (IIS-FJD), Madrid, Madrid, Spain.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
研究人员开发了新的PET生物标志物,以检测阿尔茨海默病 (AD) 模型中的大脑微血栓. 这些工具可视化纤维素和血小板,帮助早期诊断和针对阿兹海默症患者的个性化抗凝药疗法.
科学领域:
- 神经科学是一个神经科学.
- 生物标志物开发 生物标志物开发
- 医疗成像医学成像
背景情况:
- 阿尔茨海默氏病 (AD) 与前血栓状况有关,由大脑纤维素和血小板活性增加而证明.
- 这种促血栓的环境有助于早期的AD病理,如低输液和血脑屏障的破坏.
- 非侵入性检测大脑微型血栓对于识别可能受益于抗凝药治疗的患者至关重要.
研究的目的:
- 开发和验证新的正子发射断层扫描 (PET) 生物标志物,用于在AD小鼠模型中非侵入性检测大脑微血栓.
- 评估向纤维素和血小板的可行性,以成像大脑中的血栓活性.
主要方法:
- 通过将纤维素结合探针 (FBP) 和反-CD41抗体附着在转环子素 (TCO) 上,合成了两个PET探针.
- 这些TCO功能化的探针与标记为氨酸 (TZ) 的68Ga-化剂DOTA (用于纤维素) 或标记为68Ga的氧化铁纳米粒子 (用于血小板) 反应.
- 在AD小鼠 (TgCRND8) 和动脉压碎损伤模型中进行了PET/CT成像和ex vivo生物分布研究.
主要成果:
- 开发的两种PET生物标志物都在动脉压伤模型中表现出特异性,显示了血管损伤部位的痕迹积累.
- 在AD小鼠的大脑中观察到68Ga-Tz吸收的增加,无论探针是否准纤维素或CD41.
- 活体研究证实了体内发现,验证了AD小鼠大脑中增加的吸收.
结论:
- 成功开发了两个可行的神经成像策略,以评估AD的小鼠模型中的血栓前状态.
- 这些新的PET生物标志物为早期诊断和个性化抗凝剂治疗策略提供了潜在的窗口,以减轻AD的进展.
相关概念视频
01:20Blood Studies for Cardiovascular System I: Cardiac Biomarkers
749
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...
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
01:19Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers
516
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...
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
516