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Plasma p‐tau181 and GFAP reflect 7T MR‐derived changes in Alzheimer's disease: A longitudinal study of structural and functional MRI and MRS
Alzheimer's & Dementia ( IF 13.0 ) Pub Date : 2024-11-19 , DOI: 10.1002/alz.14318
Laura Göschel, Andrea Dell'Orco, Ariane Fillmer, Semiha Aydin, Bernd Ittermann, Layla Riemann, Sylvain Lehmann, Stefan Cano, Jeanette Melin, Leslie Pendrill, Patty L. Hoede, Charlotte E. Teunissen, Claudia Schwarz, Ulrike Grittner, Péter Körtvélyessy, Agnes Flöel

BACKGROUNDAssociations between longitudinal changes of plasma biomarkers and cerebral magnetic resonance (MR)‐derived measurements in Alzheimer's disease (AD) remain unclear.METHODSIn a study population (n = 127) of healthy older adults and patients within the AD continuum, we examined associations between longitudinal plasma amyloid beta 42/40 ratio, tau phosphorylated at threonine 181 (p‐tau181), glial fibrillary acidic protein (GFAP), neurofilament light chain (NfL), and 7T structural and functional MR imaging and spectroscopy using linear mixed models.RESULTSIncreases in both p‐tau181 and GFAP showed the strongest associations to 7T MR‐derived measurements, particularly with decreasing parietal cortical thickness, decreasing connectivity of the salience network, and increasing neuroinflammation as determined by MR spectroscopy (MRS) myo‐inositol.DISCUSSIONBoth plasma p‐tau181 and GFAP appear to reflect disease progression, as indicated by 7T MR‐derived brain changes which are not limited to areas known to be affected by tau pathology and neuroinflammation measured by MRS myo‐inositol, respectively.Highlights This study leverages high‐resolution 7T magnetic resonance (MR) imaging and MR spectroscopy (MRS) for Alzheimer's disease (AD) plasma biomarker insights. Tau phosphorylated at threonine 181 (p‐tau181) and glial fibrillary acidic protein (GFAP) showed the largest changes over time, particularly in the AD group. p‐tau181 and GFAP are robust in reflecting 7T MR‐based changes in AD. The strongest associations were for frontal/parietal MR changes and MRS neuroinflammation.

中文翻译:


血浆 p-tau181 和 GFAP 反映了阿尔茨海默病中 7T MR 衍生的变化:结构和功能 MRI 和 MRS 的纵向研究



背景阿尔茨海默病 (AD) 中血浆生物标志物的纵向变化与脑磁共振 (MR) 衍生测量之间的关联仍不清楚。方法在健康老年人和 AD 连续体患者的研究人群 (n = 127) 中,我们检查了纵向血浆淀粉样蛋白 β 42/40 比率、苏氨酸 181 位点 tau 磷酸化 (p-tau181)、神经胶质纤维酸性蛋白 (GFAP)、神经丝轻链 (NfL) 和 7T 结构和功能 MR 成像和光谱之间的关联使用线性混合模型。结果p-tau181 和 GFAP 的增加都显示出与 7T MR 衍生测量的最强关联,特别是通过 MR 光谱 (MRS) 肌醇确定的顶叶皮层厚度减少、显著性网络连接性降低和神经炎症增加。讨论血浆 p-tau181 和 GFAP 似乎反映了疾病进展,如 7T MR 衍生的大脑变化所示,这些变化不限于已知受 tau 病理影响的区域和 MRS 肌醇测量的神经炎症。亮点 本研究利用高分辨率 7T 磁共振 (MR) 成像和 MR 光谱 (MRS) 来了解阿尔茨海默病 (AD) 血浆生物标志物。Tau 在苏氨酸 181 (p-tau181) 和神经胶质纤维酸性蛋白 (GFAP) 位点磷酸化随时间的变化最大,尤其是在 AD 组中。p-tau181 和 GFAP 在反映 AD 中基于 7T MR 的变化方面是稳健的。最强的相关性是额叶/顶叶 MR 变化和 MRS 神经炎症。
更新日期:2024-11-19
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