2
|
Hegen H, Reindl M. Recent developments in MOG-IgG associated neurological disorders. Ther Adv Neurol Disord 2020; 13:1756286420945135. [PMID: 33029200 PMCID: PMC7521831 DOI: 10.1177/1756286420945135] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 07/02/2020] [Indexed: 12/13/2022] Open
Abstract
In the past few years, acquired demyelinating syndromes of the central nervous system associated with antibodies against myelin oligodendrocyte glycoprotein (MOG) have evolved into a new inflammatory disease entity distinct from neuromyelitis optica spectrum disorders or multiple sclerosis. The meticulous clinical description of patients with MOG IgG antibodies (MOG-IgG) has been achieved by development and use of highly specific cell-based assays. MOG-IgG associated disorders comprise a wide spectrum of syndromes ranging from acute disseminated encephalomyelitis predominantly in children to optic neuritis or myelitis mostly in adults. In recent studies, phenotype of MOG-IgG associated disorders has further broadened with the description of cases of brainstem encephalitis, encephalitis with seizures and overlap syndromes with other types of autoimmune encephalitis. In this review, we provide an overview of current knowledge of MOG-IgG associated disorders, describe the clinical presentations identified, highlight differences from neuromyelitis optica spectrum disorders and multiple sclerosis, summarize clinical outcome and concepts of immune treatment, depict the underlying mechanisms of antibody pathogenicity and provide the methodological essentials of MOG-IgG assays.
Collapse
Affiliation(s)
- Harald Hegen
- Clinical Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria
| | - Markus Reindl
- Clinical Department of Neurology, Medical University of Innsbruck, Anichstrasse 35, Innsbruck, A-6020, Austria
| |
Collapse
|
3
|
Abstract
Anti-myelin oligodendrocyte glycoprotein (MOG) antibodies (MOG-Abs) were first detected by immunoblot and enzyme-linked immunosorbent assay nearly 30 years ago, but their association with multiple sclerosis (MS) was not specific. Use of cell-based assays with native MOG as the substrate enabled identification of a group of MOG-Ab-positive patients with demyelinating phenotypes. Initially, MOG-Abs were reported in children with acute disseminated encephalomyelitis (ADEM). Further studies identified MOG-Abs in adults and children with ADEM, seizures, encephalitis, anti-aquaporin-4-antibody (AQP4-Ab)-seronegative neuromyelitis optica spectrum disorder (NMOSD) and related syndromes (optic neuritis, myelitis and brainstem encephalitis), but rarely in MS. This shift in our understanding of the diagnostic assays has re-invigorated the examination of MOG-Abs and their role in autoimmune and demyelinating disorders of the CNS. The clinical phenotypes, disease courses and responses to treatment that are associated with MOG-Abs are currently being defined. MOG-Ab-associated disease is different to AQP4-Ab-positive NMOSD and MS. This Review provides an overview of the current knowledge of MOG, the metrics of MOG-Ab assays and the clinical associations identified. We collate the data on antibody pathogenicity and the mechanisms that are thought to underlie this. We also highlight differences between MOG-Ab-associated disease, NMOSD and MS, and describe our current understanding on how best to treat MOG-Ab-associated disease.
Collapse
|
4
|
Cantó LN, Boscá SC, Vicente CA, Gil-Perontín S, Pérez-Miralles F, Villalba JC, Nuñez LC, Casanova Estruch B. Brain Atrophy in Relapsing Optic Neuritis Is Associated With Crion Phenotype. Front Neurol 2019; 10:1157. [PMID: 31736862 PMCID: PMC6838209 DOI: 10.3389/fneur.2019.01157] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 10/15/2019] [Indexed: 01/09/2023] Open
Abstract
Background and objective: Chronic relapsing inflammatory optic neuritis (CRION) is one of the more common phenotypes related to myelin oligodendrocyte glycoprotein antibodies (MOG-Abs). The absence of specific biomarkers makes distinguishing between CRION and relapsing inflammatory ON (RION) difficult. A recent work has suggested a widespread affectation of the central nervous system in CRION patients. In order to search for a potential CRION marker we have measured brain atrophy in a cohort of patients, stratified by phenotypes: CRION, RION, multiple sclerosis with a history of optic neuritis (MS-ON), and MOG-Abs status. Methods: A cross-sectional study was conducted in 31 patients (seven CRION, 11 RION, and 13 MS-ON). All patients were tested for MOG and aquaporin-4 antibodies (AQ4-Abs). Clinical data were collected. Brain atrophy was calculated by measuring the brain parenchyma fraction (BPF) with Neuroquant® software. Results: Four of seven CRION patients and one of 11 RION patients were positive for MOG-Abs (p = 0.046) and no MS-ON patients tested positive to MOG-Abs. All patients were negative to AQ4-Abs. The BPF was lower in patients with CRION than patients with RION (70.6 vs. 75.3%, p = 0.019) and similar to that in MS-ON patients. Conclusions: Brain atrophy in idiopathic inflammatory relapsing ON is present in patients with the CRION phenotype. Data from this study reflect that the optic nerve is a main target involved in these patients but not the only one. Our results should be further investigated in comprehensive and prospective studies.
Collapse
Affiliation(s)
- Laura Navarro Cantó
- Departament of Neurology, Hospital General Universitario de Elche, Alicante, Spain
| | - Sara Carratalá Boscá
- Neuroimunology and Multiple Sclerosis Research Group, Hospital Universitari i Politècnic La Fe de València, Valencia, Spain
| | | | - Sara Gil-Perontín
- Neuroimunology and Multiple Sclerosis Research Group, Hospital Universitari i Politècnic La Fe de València, Valencia, Spain
| | | | - Jessica Castillo Villalba
- Neuroimunology and Multiple Sclerosis Research Group, Hospital Universitari i Politècnic La Fe de València, Valencia, Spain
| | - Laura Cubas Nuñez
- Neuroimunology and Multiple Sclerosis Research Group, Hospital Universitari i Politècnic La Fe de València, Valencia, Spain
| | | |
Collapse
|
5
|
Liu H, Zhou H, Wang J, Sun M, Teng D, Song H, Xu Q, Wei S. The prevalence and prognostic value of myelin oligodendrocyte glycoprotein antibody in adult optic neuritis. J Neurol Sci 2018; 396:225-231. [PMID: 30522039 DOI: 10.1016/j.jns.2018.11.029] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 11/13/2018] [Accepted: 11/26/2018] [Indexed: 10/27/2022]
Abstract
BACKGROUND AND OBJECTIVE Adult demyelinating optic neuritis (ON) with positive myelin-oligodendrocyte glycoprotein antibody (MOG-Ab) has distinct clinical features. This study aimed to investigate the point prevalence, relationship with steroid dependency and prognosis value of MOG-Ab in adult ON. METHODS Clinical data analysis was undertaken in adults with ON admitted between December 2014 and January 2016. Patients were classified into three groups based on aquaporin-4 antibody (AQP4-Ab) and MOG-Ab status: AQP4-ON, MOG-ON and seronegative-ON. RESULTS A total of 158 adults with ON (190 eyes) were assessed, including 31 MOG-ON (19.6%), 67 AQP4-ON (42.4%) and 60 seronegative-ON (38.0%) cases. The female-to-male ratio was significantly lower in MOG-ON (1.8:1) than that in AQP4-ON (8.6:1) groups (p = .005). The median age, percentage of bilateral ON and visual loss at the nadir at onset was similar among the three groups. Thirty-eight eyes (76%) in the MOG-ON group showed good visual recovery (>20/40) in the final visit, which is statistically better than that in the AQP4-ON and seronegative-ON groups (p < .001 and p = .006, resoectively). Fifteen adults with ON (9.5%) showed dependency on steroid, which was particularly prominent in the MOG-ON group (11/31, 35.5%) and rarely presented in the AQP4-ON (2, 3.0%) and seronegative-ON (2, 3.3%) groups. Results suggested less loss of pRNFL in MOG-ON than that in AQP4-ON group (p < .001), and a larger proportion of canalicular segment involved in MOG-ON adults (p = .007 and p < .001). CONCLUSION MOG-ON had the smallest proportion of acute demyelinating ON in Chinese adults. One third of adults with MOG-ON predominantly showed a substantial dependency on steroids and relapse on steroid reduction or cessation, which rarely presented in AQP4-ON and seronegative-ON adults.
Collapse
Affiliation(s)
- Hongjuan Liu
- Department of Ophthalmology, Military General Hospital of Beijing PLA, Beijing, China
| | - Huanfen Zhou
- Department of Ophthalmology, Military General Hospital of Beijing PLA, Beijing, China
| | - Junqing Wang
- Department of Ophthalmology, Military General Hospital of Beijing PLA, Beijing, China
| | - Mingming Sun
- Department of Ophthalmology, Military General Hospital of Beijing PLA, Beijing, China
| | - Da Teng
- Department of Ophthalmology, Military General Hospital of Beijing PLA, Beijing, China
| | - Honglu Song
- Department of Ophthalmology, Military General Hospital of Beijing PLA, Beijing, China
| | - Quangang Xu
- Department of Ophthalmology, Military General Hospital of Beijing PLA, Beijing, China
| | - Shihui Wei
- Department of Ophthalmology, Military General Hospital of Beijing PLA, Beijing, China.
| |
Collapse
|
6
|
Etemadifar M, Abbasi M, Salari M, Etemadifar F, Tavakoli H. Comparing myelin oligodendrocyte glycoprotein antibody (MOG-Ab) and non MOG-Ab associated optic neuritis: Clinical course and treatment outcome. Mult Scler Relat Disord 2018; 27:127-130. [PMID: 30368225 DOI: 10.1016/j.msard.2018.10.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Revised: 10/12/2018] [Accepted: 10/16/2018] [Indexed: 11/29/2022]
Abstract
BACKGROUND Recent studies have suggested that anti-MOG antibodies and optic neuritis are associated and anti-MOG antibody positive patients have had better recoveries. The purpose of this study was to compare the clinical course and treatment outcome of MOG-Ab associated and non-MOG-Ab associated ON. METHODS Patients diagnosed with optic neuritis were referred for brain and cervical MRI. Blood samples were also taken to measure MOG antibody and NMO antibody levels. The patients were treated based on a standard steroid pulse therapy. RESULTS Between October 2015 and October 2017, 98 patients with ON were enrolled in the study. MS was diagnosed based on abnormality of patients' MRI results. Moreover, MRI finding of 58% of patients in MOG group and 80% of patients in NMO group was abnormal (P-value = 0.707). The treatment increased the visual acuity significantly in all groups after 12 months. Patients in the NMO group were the only ones without significant change in their visual acuity in the first six months. On the other hand, the only patients with significant change in their visual acuity in the second six month were those in the MS group. CONCLUSION We showed that patients' response to the steroid treatment is different between the MOG group and non-MOG group. The results suggest that presence of MOG-Ab influences the treatment outcome and its length.
Collapse
Affiliation(s)
- Masoud Etemadifar
- Department of Neurology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Maedeh Abbasi
- Department of Neurology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mehri Salari
- Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Etemadifar
- Neurosurgery Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Hossein Tavakoli
- Department of Physiology and Pathophysiology, University of Manitoba, 744 Bannatyne Avenue, Winnipeg, MB R3E0W2, Canada.
| |
Collapse
|
7
|
Jitprapaikulsan J, Chen JJ, Flanagan EP, Tobin WO, Fryer JP, Weinshenker BG, McKeon A, Lennon VA, Leavitt JA, Tillema JM, Lucchinetti C, Keegan BM, Kantarci O, Khanna C, Jenkins SM, Spears GM, Sagan J, Pittock SJ. Aquaporin-4 and Myelin Oligodendrocyte Glycoprotein Autoantibody Status Predict Outcome of Recurrent Optic Neuritis. Ophthalmology 2018; 125:1628-1637. [PMID: 29716788 DOI: 10.1016/j.ophtha.2018.03.041] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 03/20/2018] [Accepted: 03/21/2018] [Indexed: 10/17/2022] Open
Abstract
PURPOSE To determine the aquaporin-4 and myelin oligodendrocyte glycoprotein (MOG) immunoglobulin G (IgG) serostatus and visual outcomes in patients with recurrent optic neuritis (rON) initially seeking treatment. DESIGN Cross-sectional cohort study. PARTICIPANTS The study identified patients by searching the Mayo Clinic computerized central diagnostic index (January 2000-March 2017). The 246 eligible patients fulfilled the following criteria: (1) initially seeking treatment for at least 2 consecutive episodes of optic neuritis (ON) and (2) serum available for testing. METHODS Serum was tested for aquaporin-4 IgG and MOG IgG1 using an in-house validated flow cytometric assay using live HEK293 cells transfected with M1 aquaporin-4 or full-length MOG. MAIN OUTCOMES MEASURES Aquaporin-4 IgG and MOG IgG1 serostatus, clinical characteristics, and visual outcomes. RESULTS Among 246 patients with rON at presentation, glial autoantibodies were detected in 32% (aquaporin-4 IgG, 19%; MOG IgG1, 13%); 186 patients had rON only and 60 patients had rON with subsequent additional inflammatory demyelinating attacks (rON-plus group). The rON-only cohort comprised the following: double seronegative (idiopathic), 110 patients (59%); MOG IgG1 positive, 27 patients (15%; 4 with chronic relapsing inflammatory optic neuropathy); multiple sclerosis (MS), 25 patients (13%); and aquaporin-4 IgG positive, 24 patients (13%). The rON-plus cohort comprised the following: aquaporin-4 IgG positive, 23 patients (38%); MS, 22 patients (37%); double seronegative, 11 patients (18%); and MOG IgG1 positive, 4 patients (7%). The annualized relapse rate for the rON-only group was 1.2 for MOG IgG1-positive patients, 0.7 for double-seronegative patients, 0.6 for aquaporin-4 IgG-positive patients, and 0.4 for MS patients (P = 0.005). The median visual acuity (VA) of patients with the worst rON-only attack at nadir were hand movements in aquaporin-4 IgG-positive patients, between counting fingers and hand movements in MOG IgG1-positive patients, 20/800 in idiopathic patients, and 20/100 in MS patients (P = 0.02). The median VA at last follow-up for affected eyes of the rON-only cohort were counting fingers for aquaporin-4 IgG-positive patients, 20/40 for idiopathic patients, 20/25 for MS patients and MOG IgG1-positive patients (P = 0.006). At 5 years after ON onset, 59% of aquaporin-4 IgG-positive patients, 22% of idiopathic patients, 12% of MOG IgG1-positive patients, and 8% of MS patients were estimated to have severe visual loss. CONCLUSIONS Glial autoantibodies (MOG IgG1 or aquaporin-4 IgG) are found in one third of all patients with rON. Aquaporin-4 IgG seropositivity predicts a worse visual outcome than MOG IgG1 seropositivity, double seronegativity, or MS diagnosis. Myelin oligodendrocyte glycoprotein IgG1 is associated with a greater relapse rate but better visual outcomes.
Collapse
Affiliation(s)
- Jiraporn Jitprapaikulsan
- Department of Neurology, Mayo Clinic, Rochester, Minnesota; Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota
| | - John J Chen
- Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota; Center for MS and Autoimmune Neurology, Mayo Clinic, Rochester, Minnesota
| | - Eoin P Flanagan
- Department of Neurology, Mayo Clinic, Rochester, Minnesota; Center for MS and Autoimmune Neurology, Mayo Clinic, Rochester, Minnesota
| | - W Oliver Tobin
- Department of Neurology, Mayo Clinic, Rochester, Minnesota; Center for MS and Autoimmune Neurology, Mayo Clinic, Rochester, Minnesota
| | - Jim P Fryer
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota
| | - Brian G Weinshenker
- Department of Neurology, Mayo Clinic, Rochester, Minnesota; Center for MS and Autoimmune Neurology, Mayo Clinic, Rochester, Minnesota
| | - Andrew McKeon
- Department of Neurology, Mayo Clinic, Rochester, Minnesota; Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota; Center for MS and Autoimmune Neurology, Mayo Clinic, Rochester, Minnesota
| | - Vanda A Lennon
- Department of Neurology, Mayo Clinic, Rochester, Minnesota; Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota; Center for MS and Autoimmune Neurology, Mayo Clinic, Rochester, Minnesota; Department of Immunology, Mayo Clinic, Rochester, Minnesota
| | | | - Jan-Mendelt Tillema
- Department of Neurology, Mayo Clinic, Rochester, Minnesota; Center for MS and Autoimmune Neurology, Mayo Clinic, Rochester, Minnesota
| | - Claudia Lucchinetti
- Department of Neurology, Mayo Clinic, Rochester, Minnesota; Center for MS and Autoimmune Neurology, Mayo Clinic, Rochester, Minnesota
| | - B Mark Keegan
- Department of Neurology, Mayo Clinic, Rochester, Minnesota; Center for MS and Autoimmune Neurology, Mayo Clinic, Rochester, Minnesota
| | - Orhun Kantarci
- Department of Neurology, Mayo Clinic, Rochester, Minnesota; Center for MS and Autoimmune Neurology, Mayo Clinic, Rochester, Minnesota
| | - Cheryl Khanna
- Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota
| | - Sarah M Jenkins
- Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Grant M Spears
- Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Jessica Sagan
- Center for MS and Autoimmune Neurology, Mayo Clinic, Rochester, Minnesota
| | - Sean J Pittock
- Department of Neurology, Mayo Clinic, Rochester, Minnesota; Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota; Center for MS and Autoimmune Neurology, Mayo Clinic, Rochester, Minnesota.
| |
Collapse
|