Abstract:
BACKGROUND:Neuromyelitis optica (NMO) is a severe autoimmune inflammatory disorder of the central nervous system. NMO and its abortive forms are referred to as NMO spectrum disorders (NMOSD). NMOSD are mostly associated with antibodies to aquaporin-4 (AQP4-IgG). However, recent studies have demonstrated antibodies to myelin oligodendrocyte glycoprotein (MOG-IgG) in a subset of patients. Data on NMOSD in North Africa are sparse. OBJECTIVE:To describe the frequency of MOG-IgG and AQP4-IgG among patients with optic neuritis (ON) and/or myelitis in Algeria as well as the clinical and paraclinical features associated with these antibodies. METHODS:Retrospective testing of 42 patients with optic neuritis and/or myelitis treated at the teaching hospital of TiziOuzou for MOG-IgG and AQP4-IgG, and retrospective evaluation of the patients' medical records. RESULTS:Six of 42 (14.3%) patients were positive for AQP4-IgG and 3/42 (7.1%) were positive for MOG-IgG. No patient was positive for both AQP4-IgG and MOG-IgG. All antibody-positive patients were women. MOG-IgG was associated with severe episodes of ON in all MOG-IgG-positive patients. Steroid treatment was followed by complete remission in two patients. AQP4-IgG was associated with ON and/or longitudinally extensive transverse myelitis (LETM), often with severe onset. While all six of the AQP4-IgG-positive patients met the 2015 IPND criteria for NMOSD, only one of the three MOG-IgG-positive patients did so. Interestingly, clinically silent extensive spinal cord or brain lesions were present in two of the three MOG-IgG-positive patients, and altered visual evoked potentials without clinical evidence of ON were found in three of the six AQP4-IgG-positive patients. CONCLUSION:MOG-IgG and AQP4-IgG are found in a substantial subset of Algerian patients with ON and/or myelitis, are present predominantly in women, and may be associated with differences in clinical presentation and, possibly, outcome. Only a subset of MOG-IgG positive patients meets the current diagnostic criteria for NMOSD.
journal_name
J Neurol Scijournal_title
Journal of the neurological sciencesauthors
Bouzar M,Daoudi S,Hattab S,Bouzar AA,Deiva K,Wildemann B,Reindl M,Jarius Sdoi
10.1016/j.jns.2017.08.3254subject
Has Abstractpub_date
2017-10-15 00:00:00pages
240-244eissn
0022-510Xissn
1878-5883pii
S0022-510X(17)33755-3journal_volume
381pub_type
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