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Journal of Immunology Research
Volume 2015, Article ID 673503, 12 pages
http://dx.doi.org/10.1155/2015/673503
Research Article

Decreased Frequency of Circulating Myelin Oligodendrocyte Glycoprotein B Lymphocytes in Patients with Relapsing-Remitting Multiple Sclerosis

1INSERM, UMR1064, 44093 Nantes, France
2Faculté de Médecine, Université de Nantes, 44035 Nantes, France
3Service de Neurologie, CHU de Nantes, 44093 Nantes, France
4Clinical Department of Neurology, Innsbruck Medical University, 6020 Innsbruck, Austria
5INSERM, CIC 004, 44093 Nantes, France

Received 7 August 2014; Revised 26 October 2014; Accepted 14 November 2014

Academic Editor: Jianying Zhang

Copyright © 2015 Annie Elong Ngono et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Although there is no evidence for a role of anti-MOG antibodies in adult MS, no information on B lymphocytes with MOG-committed BCR is available. We report here on the frequency of anti-MOG B cells forming rosettes with polystyrene beads (BBR) covalently bound to the extracellular domain of rhMOG in 38 relapsing-remitting patients (RRMS) and 50 healthy individuals (HI). We show a substantial proportion of circulating anti-MOG-BBR in both RRMS and HI. Strikingly, MOG-specific B cells frequencies were lower in MS than in HI. Anti-MOG antibodies measured by a cell-based assay were not different between MS patients and controls, suggesting a specific alteration of anti-MOG B cells in MS. Although anti-MOG-BBR were higher in CNS fluid than in blood, no difference was observed between MS and controls. Lower frequency of MOG-BBR in MS was not explained by an increased apoptosis, but a trend for lower proliferative capacity was noted. Despite an efficient B cell transmigration across brain derived endothelial cells, total and anti-MOG B cells transmigration was similar between MS and HI. The striking alteration in MOG-specific B cells, independent of anti-MOG antibody titers, challenges our view on the role of MOG-specific B cells in MS.