MR T2-relaxation time as an indirect measure of brain water content and disease activity in NMOSD

灰质 白质 医学 亚临床感染 视神经脊髓炎 多发性硬化 逻辑回归 逐步回归 磁共振成像 内科学 胃肠病学 病理 放射科 精神科
作者
Laura Cacciaguerra,Elisabetta Pagani,Marta Radaelli,Šarlota Mesaroš,Vittorio Martinelli,Jovana Ivanović,Jelena Drulović,Massimo Filippi,Maria A. Rocca
出处
期刊:Journal of Neurology, Neurosurgery, and Psychiatry [BMJ]
卷期号:93 (7): 753-760 被引量:2
标识
DOI:10.1136/jnnp-2022-328956
摘要

Objective Since astrocytes at the blood–brain barrier are targeted by neuromyelitis optica spectrum disorder (NMOSD), this study aims to assess whether patients with NMOSD have a subclinical accumulation of brain water and if it differs according to disease activity. Methods Seventy-seven aquaporin-4-positive patients with NMOSD and 105 healthy controls were enrolled at two European centres. Brain dual-echo turbo spin-echo MR images were evaluated and maps of T2 relaxation time (T2rt) in the normal-appearing white matter (NAWM), grey matter and basal ganglia were obtained. Patients with a clinical relapse within 1 month before or after MRI acquisition were defined ‘active’. Differences between patients and controls were assessed using z-scores of T2rt obtained with age-adjusted and sex-adjusted linear models from each site. A stepwise binary logistic regression was run on clinical and MRI variables to identify independent predictors of disease activity. Results Patients had increased T2rt in both white and grey matter structures (p range: 0.014 to <0.0001). Twenty patients with NMOSD were defined active. Despite similar clinical and MRI features, active patients had a significantly increased T2rt in the NAWM and grey matter compared with those clinically stable (p range: 0.010–0.002). The stepwise binary logistic regression selected the NAWM as independently associated with disease activity (beta=2.06, SE=0.58, Nagelkerke R 2 =0.46, p<0.001). Conclusions In line with the research hypothesis, patients with NMOSD have increased brain T2rt. The magnitude of this alteration might be useful for identifying those patients with active disease.
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