MOG-IgG in primary and secondary chronic progressive multiple sclerosis: a multicenter study of 200 patients and review of the literature
- PMID: 29554927
- PMCID: PMC5859439
- DOI: 10.1186/s12974-018-1108-6
MOG-IgG in primary and secondary chronic progressive multiple sclerosis: a multicenter study of 200 patients and review of the literature
Abstract
Background: Antibodies to human full-length myelin oligodendrocyte glycoprotein (MOG-IgG) as detected by new-generation cell-based assays have recently been described in patients presenting with acute demyelinating disease of the central nervous system, including patients previously diagnosed with multiple sclerosis (MS). However, only limited data are available on the relevance of MOG-IgG testing in patients with chronic progressive demyelinating disease. It is unclear if patients with primary progressive MS (PPMS) or secondary progressive MS (SPMS) should routinely be tested for MOG-IgG.
Objective: To evaluate the frequency of MOG-IgG among patients classified as having PPMS or SPMS based on current diagnostic criteria.
Methods: For this purpose, we retrospectively tested serum samples of 200 patients with PPMS or SPMS for MOG-IgG using cell-based assays. In addition, we performed a review of the entire English language literature on MOG-IgG published between 2011 and 2017.
Results: None of 139 PPMS and 61 SPMS patients tested was positive for MOG-IgG. Based on a review of the literature, we identified 35 further MOG-IgG tests in patients with PPMS and 55 in patients with SPMS; the only reportedly positive sample was positive just at threshold level and was tested in a non-IgG-specific assay. In total, a single borderline positive result was observed among 290 tests.
Conclusion: Our data suggest that MOG-IgG is absent or extremely rare among patients with PPMS or SPMS. Routine screening of patients with typical PPMS/SPMS for MOG-IgG seems not to be justified.
Keywords: Antibodies; Immunoglobulin G; MOG-IgG; Myelin oligodendrocyte glycoprotein (MOG); Neuromyelitis optica spectrum disorders (NMOSD); Primary chronic progressive MS (PPMS); Secondary chronic progressive MS (SPMS).
Conflict of interest statement
Ethics approval and consent to participate
The study was approved by the institutional review boards of the participating centers. Patients gave written informed consent or were tested in an anonymised fashion as requested by the institutional review board of the University of Heidelberg.
Consent for publication
Not applicable.
Competing interests
BW has received research grants, speaking fees, and travel grants from Merck Serono, Biogen, Teva, Novartis, Sanofi Genzyme, Bayer Healthcare, the Klaus Tschira Stiftung, and the Dietmar Hopp Stiftung. JPS has received research grants and speaking fees from DFG, Biogen, and Genzyme not related to the present work. KR has received research grants from German Ministry of Education and Research (BMBF/KKNMS, Competence Network Multiple Sclerosis), Novartis, Merck Serono, and the Charité Research Fund; honoraria for consultancy or speaking and travel reimbursement from Novartis, Bayer Healthcare, Biogen Idec, Merck Serono, sanofi-aventis/Genzyme, Teva Pharmaceuticals, and Guthy Jackson Charitable Foundation; all unrelated to the submitted work. MP received research grants, speaker honoraria, and travel/accommodation/meeting expenses from Novartis, and speaker honoraria from Genzyme, Biogen Idec., Merck Serono, and Roche. I.K. received honoraria for consultancy or speaking and travel reimbursement from Bayer Healthcare, Biogen, Chugai, Merck, Novartis, Roche, and Shire, and research support from Affectis, Biogen, Chugai and Diamed, all not related to the presented work. CT has received honoraria for consultation and expert testimony from Biogen Idec/GmbH, Genzyme GmbH and Novartis Pharmaceuticals; none of this interfered with the current report. K.F. is an employee of Euroimmun AG, Germany. FL is employed by a non-commercial academic institution (University Hospital Schlewsig-Holstein) offering antibody testing. The University Hospital and Medical University of Innsbruck (Austria; M.R.) receives payments for antibody assays (MOG, AQP4, and other autoantibodies) and for MOG and AQP4 antibody validation experiments organized by Euroimmun (Lübeck, Germany). All authors declare that they have no competing interests.
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