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在慢性创伤性脑损伤中,基于血液的蛋白质生物标志物的轨迹
medRxiv : the preprint server for health sciences
|March 4, 2025
概括
长期创伤性脑损伤 (TBI) 的幸存者在3.5年内显示出粉样蛋白-β (Aβ) 42/40比率的下降和质纤维酸蛋白 (GFAP) 的增加. 这些血液生物标志物可能表明TBI后正在进行的神经病理和神经退行.
科学领域:
- 神经科学是一个神经科学.
- 生物标志物发现发现
- 神经病理学神经病理学
背景情况:
- 创伤性脑损伤 (TBI) 可以导致幸存者的一个子集的渐进性神经退行 (PTND).
- 了解创伤后的长期分子变化对于识别PTND的潜在机制至关重要.
- 基于血液的蛋白质生物标志物为慢性TBI神经病理学提供了最小侵入性的窗口.
研究的目的:
- 调查慢性TBI患者血蛋白生物标志物的纵向变化.
- 评估与神经退行相关的特定蛋白质的时间动态.
- 探索与TBI的长期后果相关的潜在生物标志物.
主要方法:
- 纵向研究设计有两个时间点,平均间隔3.5年.
- 63名慢性TBI参与者的血样本使用单分子阵列技术分析了六种蛋白质生物标志物 (Aβ42/Aβ40,GFAP,NfL,BD-tau,p-tau231,p-tau181).
- 多变量线性混合效应模型用于检查蛋白质轨迹,根据年龄,性别,APOE ε4状态,并发症和损伤特征进行调整.
主要成果:
- 血Aβ42 / Aβ40比率 (q=.001) 的长度显著减少.
- 血GFAP水平的显著纵向增加 (q=.01).
- 在研究期间,没有观察到NfL,BD-tau,p-tau231或p-tau181的显著变化.
结论:
- 血Aβ42/Aβ40和GFAP水平在慢性TBI幸存者中呈现出显著的纵向变化.
- 这些发现表明,粉样β代谢失调和潜在的质激活在TBI的长期神经病理后续中起着作用.
- 观察到的生物标志物变化为未来对创伤后神经退行症 (PTND) 机制的研究提供了基础.
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