生物标志物 生物标志物
Catherine Demos1, Nikhil Padmanabhan1, Sree Uttarala1
1Meso Scale Diagnostics, LLC., Rockville, MD, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
针对TARDNA结合蛋白-43 (TDP-43) 和化TDP-43 (pTDP-43) 的新开发的免疫测试显示,它们可以作为ALS等神经退行性疾病的生物标志物. 这些测定可以在血和脑脊液中进行敏感的检测,有助于研究疾病机制.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生物化学
- 生物标志物发现发现
背景情况:
- TAR DNA结合蛋白-43 (TDP-43) 涉及神经退行性疾病的发病,如肌缩侧面硬化症 (ALS),前性痴呆症 (FTD),阿尔茨海默病 (AD) 和边缘主导的与年龄相关的TDP-43脑病变 (LATE).
- 有效的生物标志物对于了解疾病机制和进展至关重要.
- 需要改进的免疫测试来检测TDP-43及其与疾病相关的修改.
研究的目的:
- 为了开发和评估新的研究,仅使用 (RUO) 标准和超敏感的S-PLEX免疫测试对TDP-43和化TDP-43 (pTDP-43).
- 评估这些测试在检测生物样本中的TDP-43和pTDP-43的有用性,包括血和脑脊液 (CSF).
主要方法:
- 针对ALS患者和健康对照者的净化TDP-43蛋白质,碎片和生物样本 (大脑溶解物,CSF,血) 进行了抗体查.
- 标准和超敏感的S-PLEX测定被开发和特征为TDP-43和pTDP-43检测.
- 根据定量范围,灵敏度,稀释线性和特异性评估了测试性能.
主要成果:
- 标准TDP-43测定显示了10-275,000 pg/mL的定量范围,量化了100%的血样本.
- 超敏感的S-PLEX TDP-43测定 (5-34,000 pg/mL) 量化了48%的CSF样本.
- 与对照组相比,S-PLEX pTDP-43试验 (1-50,000 pg/mL) 量化了100%的血样本,而ALS患者的样本显示出较高的中位数血TDP-43水平 (p=0.0018) 和较低的中位数CSF TDP-43水平 (p=0.01) 与对照组相比.
结论:
- 针对TDP-43和pTDP-43新开发的免疫试验作为神经退行性生物标志物研究的强大研究工具.
- 这些测定有助于在临床相关样本中敏感地检测和量化TDP-43及其酸化形式.
- 这些发现支持TDP-43和pTDP-43作为神经退行性疾病中的生物标志物的潜力.
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