Prognostic relevance of quantitative and longitudinal MOG antibody testing in patients with MOGAD: a multicentre retrospective study

医学 内科学 入射(几何) 回顾性队列研究 多发性硬化 血清转化 队列 胃肠病学 免疫学 抗体 光学 物理
作者
Matteo Gastaldi,Thomas Foiadelli,Giacomo Greco,Silvia Scaranzin,Eleonora Rigoni,Stefano Masciocchi,Sérgio Ferrari,Chiara Mancinelli,Laura Brambilla,Maria Margherita Mancardi,Thea Giacomini,Diana Ferraro,Marida Della Corte,Antonio Gallo,Massimiliano Di Filippo,Luana Benedetti,Giovanni Novi,Maurizio Versino,Paola Banfi,Raffaele Iorio
出处
期刊:Journal of Neurology, Neurosurgery, and Psychiatry [BMJ]
卷期号:94 (3): 201-210 被引量:43
标识
DOI:10.1136/jnnp-2022-330237
摘要

Background IgG antibodies against myelin oligodendrocyte glycoprotein (MOG-IgG) define a subset of associated disorders (myelin oligodendrocyte glycoprotein associated disorders (MOGAD)) that can have a relapsing course. However, information on relapse predictors is scarce. The utility of retesting MOG-IgG over time and measuring their titres is uncertain. We aimed to evaluate the clinical relevance of longitudinal MOG-IgG titre measurement to predict relapses in patients with MOGAD. Methods In this retrospective multicentre Italian cohort study, we recruited patients with MOGAD and available longitudinal samples (at least one >3 months after disease onset) and tested them with a live cell-based assay with endpoint titration (1:160 cut-off). Samples were classified as ‘attack’ (within 30 days since a disease attack (n=59, 17%)) and ‘remission’ (≥31 days after attack (n=295, 83%)). Results We included 102 patients with MOGAD (57% adult and 43% paediatric) with a total of 354 samples (83% from remission and 17% from attack). Median titres were higher during attacks (1:1280 vs 1:640, p=0.001). Median onset titres did not correlate with attack-related disability, age or relapses. Remission titres were higher in relapsing patients (p=0.02). When considering the first remission sample available for each patient, titres >1:2560 were predictors of relapsing course in survival (log rank, p<0.001) and multivariate analysis (p<0.001, HR: 10.9, 95% CI 3.4 to 35.2). MOG-IgG seroconversion to negative was associated with a 95% relapse incidence rate reduction (incidence rate ratio: 0.05, p<0.001). Conclusions Persistent MOG-IgG positivity and high remission titres are associated with an increased relapse risk. Longitudinal MOG-IgG titres could be useful to stratify patients to be treated with long term immunosuppression.
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