生物标志物 生物标志物
Julie K Wisch1, Nicole S McKay2, Matthew D Zammit3
1Washington University in St. Louis School of Medicine, St. Louis, MO, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 26, 2025
概括
采样代局部近似 (SILA) 算法准确估计自自体主导性阿尔茨海默病 (ADAD) 中的粉样蛋白阳性以来的时间. 这项阿尔茨海默病 (AD) 研究使得更好的疾病阶段和AD形式之间的比较成为可能.
科学领域:
- 神经学 神经学
- 生物医学成像技术 生物医学成像技术
- 阿尔茨海默氏症疾病研究研究
背景情况:
- 阿尔茨海默氏病 (AD) 病理在几十年内进展,需要准确的治疗时间的分期.
- 自体主导AD (ADAD) 允许通过估计的症状发作年数 (EYO) 预测症状发作,但这种方法缺乏广泛的适用性.
- 对ADAD的验证,广泛适用的时间过程对于了解疾病进展和干预策略至关重要.
研究的目的:
- 验证采样代局部近似 (SILA) 算法,使用具有已知的疾病时间进程的队列.
- 建立一种可靠的方法,以使用纵向PET数据来估计自自体主导AD (ADAD) 的粉样蛋白阳性 (A时间) 的时间.
主要方法:
- 在长度ADAD队列 (N=316) 中使用PET数据评估A时间.
- 对比新阳性个体的粉样蛋白阳性 (A+) 的SILA预测年龄与A+的观察年龄.
- 利用线性回归和通用添加模型来比较A时间和EYO与症状发作和认知表现相关.
主要成果:
- SILA在预测粉样蛋白阳性时的年龄方面显示了1.15年的平均平均误差.
- 在A+时的SILA估计年龄解释了症状发作时估计年龄差异的39% (β=0.918,p<0.0001).
- A时间解释了19%的认知变异,而EYO解释了43%,表明认知和疾病进展标志物之间存在非线性关联.
结论:
- 该SILA算法提供了一个有效的时间估计从ADAD中粉样蛋白的阳性.
- 这种验证可以直接比较ADAD分期与其他AD形式,克服EYO的局限性.
- 在临床前阿尔茨海默氏症持续时间上存在显著的异质性,不仅仅是粉样蛋白状况,这突显了阿尔茨海默氏症进展的复杂性.
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