生物标志物 生物标志物
Yifan Zhao1, Tao Jin1, Nicholas F Fitz2
1University of Pittsburgh, Pittsburgh, PA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
概括
阿尔茨海默病对男性和女性的脑血流和葡萄糖代谢有不同的影响. 这项研究揭示了在临床前模型中衰老期间神经血管和代谢途径的性别特异性变化.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生物化学
- 基因组学就是基因组学.
背景情况:
- 阿尔茨海默病 (AD) 涉及神经退行和质细胞激活.
- 诸如脑粉样血管病变 (CAA) 这样的血管因素在AD中很常见,但性别之间存在差异.
- 在阿尔茨海默病的发病过程中,性别特定的途径尚未得到充分理解.
研究的目的:
- 在阿尔茨海默病中研究神经血管和代谢性的性别特异性.
- 在临床前AD模型中将功能性脑成像与单细胞转录学相关联.
- 阐明细胞特异性分子通路,是阿尔茨海默氏症性别差异的基础.
主要方法:
- 在整个寿命 (4-24个月) 中使用了APP/PS1转基因小鼠和B6C3对照.
- 在9.4T时使用定量脑血流 (qCBF) 和化学交换和转移 (CEST) MRI进行血管和代谢评估.
- 在微质细胞和星球细胞上进行单细胞mRNA测序,并对粉样质斑块和CAA进行组织学分析.
主要成果:
- 对照小鼠表现出比AD小鼠更高的脑血流 (CBF) 和葡萄糖吸收.
- 观察到性别特异性差异:男性对照人群比女性有更高的CBF,在AD中失去了差异.
- 与对照女性相比,AD女性的葡萄糖代谢降低,而AD男性的胺和肌酸水平比AD男性低.
结论:
- 在临床前AD中提出了血管和神经能量功能的综合观点.
- 证明了结合多尺度成像和转录学来研究特定性别大脑衰老的实用性.
- 突出了受性别影响的健康和病态大脑衰老的不同轨迹.
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