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2017 ; 264
(12
): 2420-2430
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Clinical spectrum and IgG subclass analysis of anti-myelin oligodendrocyte
glycoprotein antibody-associated syndromes: a multicenter study
#MMPMID29063242
Mariotto S
; Ferrari S
; Monaco S
; Benedetti MD
; Schanda K
; Alberti D
; Farinazzo A
; Capra R
; Mancinelli C
; De Rossi N
; Bombardi R
; Zuliani L
; Zoccarato M
; Tanel R
; Bonora A
; Turatti M
; Calabrese M
; Polo A
; Pavone A
; Grazian L
; Sechi G
; Sechi E
; Urso D
; Delogu R
; Janes F
; Deotto L
; Cadaldini M
; Bianchi MR
; Cantalupo G
; Reindl M
; Gajofatto A
J Neurol
2017[Dec]; 264
(12
): 2420-2430
PMID29063242
show ga
Anti-myelin oligodendrocyte glycoprotein antibodies (MOG-Ab) recently emerged as
a potential biomarker in patients with inflammatory demyelinating diseases of the
central nervous system. We here compare the clinical and laboratory findings
observed in a cohort of MOG-Ab seropositive and seronegative cases and describe
IgG subclass analysis results. Consecutive serum samples referred to Verona
University Neuropathology Laboratory for aquaporin-4 (AQP4)-Ab and/or MOG-Ab
testing were analysed between March 2014 and May 2017. The presence of AQP4-Ab
was determined using a cell-based assay. A live cell immunofluorescence assay was
used for the detection of MOG-IgG and IgG subclass analysis. Among 454 analysed
samples, 29 were excluded due to AQP4-Ab positivity or to the final demonstration
of a disorder not compatible with MOG-Ab. We obtained clinical data in 154 out of
425 cases. Of these, 22 subjects resulted MOG-Ab positive. MOG-Ab positive
patients were mainly characterised by the involvement of the optic nerve and/or
spinal cord. Half of the cases presented relapses and the recovery was usually
partial. Brain MRI was heterogeneous while short lesions were the prevalent
observation on spinal cord MRI. MOG-Ab titre usually decreased in non-relapsing
cases. In all MOG-IgG positive cases, we observed IgG1 antibodies, which were
predominant in most subjects. IgG2 (5/22), IgG3 (9/22) and IgG4 (3/22) antibodies
were also detectable. We confirm that MOG-Ab-related syndromes have distinct
features in the spectrum of demyelinating conditions, and we describe the
possible role of the different IgG subclasses in this condition.