To identify circulating myelin oligodendrocyte glycoprotein (MOG)-specific B cells in the blood of patients with MOG antibodies (Abs) and to determine whether circulating MOG-specific B cells are linked to levels and epitope specificity of serum anti-MOG-Abs.
We compared peripheral blood from 21 patients with MOG-Abs and 26 controls for the presence of MOG-specific B cells. We differentiated blood-derived B cells in vitro in separate culture wells to Ab-producing cells via engagement of Toll-like receptors 7 and 8. We quantified the anti-MOG reactivity with a live cell–based assay by flow cytometry. We determined the recognition of MOG epitopes with a panel of mutated variants of MOG.
MOG-Ab–positive patients had a higher frequency of MOG-specific B cells in blood than controls, but MOG-specific B cells were only detected in about 60% of these patients. MOG-specific B cells in blood showed no correlation with anti-MOG Ab levels in serum, neither in the whole group nor in the untreated patients. Epitope analysis of MOG-Abs secreted from MOG-specific B cells cultured in different wells revealed an intraindividual heterogeneity of the anti-MOG autoimmunity.
This study shows that patients with MOG-Abs greatly differ in the abundance of circulating MOG-specific B cells, which are not linked to levels of MOG-Abs in serum suggesting different sources of MOG-Abs. Identification of MOG-specific B cells in blood could be of future relevance for selecting patients with MOG-Abs for B cell–directed therapy.
(1) The Scientific and Technological Research Council of Turkey (TUBITAK), Postdoctoral research fellowship program 2219, 2015-2016
(1) European Academy of Neurology, Research Fellowship, 2015- 2016 (2) Alexander von Humboldt Foundation, Georg-Forster Experienced Researcher Fellowship, 2017-2018
Inhibition of autism spectrum disorders using decoy antigens to maternal brain reactive antibodies (W02017062270A1) (1.) A method for inhibiting or reducing development of an Autism spectrum disorder in a fetus or an infant that is in utero exposed to pathogenic autoantibodies, particularly blocking specific autoantibodies. (2.) Methods of diagnosis and methods of treatment and prevention for autism spectrum disorder are provided using decoy antigens to maternal brain reactive antibodies.
Received Award from Synergy (Munich Cluster for Systems Neurology)
Served on Scientific Advisory boards for Novartis; Biogen- Idec; Bayer-Schering; Merck-Serono; Sanofi-Aventis; Teva; Served on data safety monitoring boards for Novartis; Merck Serono (since 2007); CSL Behring; Medday; Actelion
Received funding for trips from Novartis; Biogen-Idec; Bayer-Schering; Merck-Serono; Sanofi- Aventis; Teva; Genzyme
Serve as editorial board member of Neurology (currently); Brain; Clinical and Experimental Immunology; Deutsche Medizinische Wochenschrift; Expert Opinion on Biological Therapy; Journal of Neuroimmunology; Multiple Sclerosis; Nervenarzt; Practical Neurology; Seminars in Immunopathology; Therapeutic Advances in Neurological Disorders
Receive consulting fees from Novartis; Biogen-Idec; Bayer- Schering; Merck-Serono; Sanofi-Aventis; Teva; Genzyme; Medday; Actelion
Received grant support from Novartis (2008 to present); Biogen-Idec (2005-2009); Bayer-Schering (2001-2006); Teva (1999-2007)
I have received travel expenses and personal compensations for lectures from Bayer Healthcare, Teva Pharma, Merck, Novartis Pharma, Sanofi-Aventis/Genzyme, CLB Behring, Roche Pharma and Biogen as well as grant support from Bayer-Schering AG, Novartis and Chugai Pharma
(1) Roche, Honorarium (2) Novartis, Honorarium (3) Sanofi, Honorarium (4) Biogen, Honorarium (5) Bioeq, Honorarium
(1) Journal of Pathology, Editorial board, since 2010 (2) Plos One, editor, since 2014 (3) Journal of Biological Chemistry, reviewing editor, since 2015 (4) Frontiers in Immunology, Frontiers in Neurology, associate editor, since 2017
(1) Verein zur Therapieforschung für Multiple Sklerose Kranke
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