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Aquaporin-4-IgG

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https://www.readbyqxmd.com/read/29716788/aquaporin-4-and-myelin-oligodendrocyte-glycoprotein-autoantibody-status-predict-outcome-of-recurrent-optic-neuritis
#1
Jiraporn Jitprapaikulsan, John J Chen, Eoin P Flanagan, W Oliver Tobin, Jim P Fryer, Brian G Weinshenker, Andrew McKeon, Vanda A Lennon, Jacqueline A Leavitt, Jan-Mendelt Tillema, Claudia Lucchinetti, B Mark Keegan, Orhun Kantarci, Cheryl Khanna, Sarah M Jenkins, Grant M Spears, Jessica Sagan, Sean J Pittock
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...
April 28, 2018: Ophthalmology
https://www.readbyqxmd.com/read/29709797/trident-sign-trumps-aquaporin-4-igg-elisa-in-diagnostic-value-in-a-case-of-longitudinally-extensive-transverse-myelitis
#2
Evan A Jolliffe, B Mark Keegan, Eoin P Flanagan
Longitudinally-extensive T2-hyperintense spinal cord lesions (≥3 vertebral segments) are associated with neuromyelitis optical spectrum disorder but occur with other disorders including spinal cord sarcoidosis. When linear dorsal subpial enhancement is accompanied by central cord/canal enhancement the axial post-gadolinium sequences may reveal a "trident" pattern that has previously been shown to be strongly suggestive of spinal cord sarcoidosis. We report a case in which the patient was initially diagnosed with neuromyelitis optical spectrum disorder, but where the "trident" sign ultimately led to the correct diagnosis of spinal cord sarcoidosis...
April 21, 2018: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/29670575/mog-igg-associated-optic-neuritis-encephalitis-and-myelitis-lessons-learned-from-neuromyelitis-optica-spectrum-disorder
#3
REVIEW
Giordani Rodrigues Dos Passos, Luana Michelli Oliveira, Bruna Klein da Costa, Samira Luisa Apostolos-Pereira, Dagoberto Callegaro, Kazuo Fujihara, Douglas Kazutoshi Sato
Antibodies against myelin oligodendrocyte glycoprotein (MOG-IgG) have been found in some cases diagnosed as seronegative neuromyelitis optica spectrum disorder (NMOSD). MOG-IgG allowed the identification of a subgroup with a clinical course distinct from that of NMOSD patients who are seropositive for aquaporin-4-IgG antibodies. MOG-IgG is associated with a wider clinical phenotype, not limited to NMOSD, with the majority of cases presenting with optic neuritis (ON), encephalitis with brain demyelinating lesions, and/or myelitis...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29552355/severe-aquaporin-4-igg-positive-neuromyelitis-optica-with-disseminated-herpes-zoster-in-a-pregnant-woman-successfully-treated-with-intravenous-immunoglobulin
#4
Yuki Matsumoto, Mario Tsuchiya, Shakespear Norshalena, Chikako Kaneko, Jin Kubo, Teiji Yamamoto, Toshiyuki Takahashi, Kazuo Fujihara
A 26-year-old, 17-week pregnant woman developed aquaporin-4-IgG-positive severe longitudinally extensive transverse myelitis during the course of disseminated herpes zoster and became quadriparetic. She was unresponsive to high-dose intravenous methylprednisolone but became able to walk without assistance after intravenous immunoglobulin. One and a half months later, left optic neuritis developed but her vision improved with intravenous immunoglobulin. The only sequela was left T5 girdle sensation, and she delivered a healthy baby...
January 2018: Multiple Sclerosis Journal—Experimental, Translational and Clinical
https://www.readbyqxmd.com/read/29470571/prevalence-of-myelin-oligodendrocyte-glycoprotein-and-aquaporin-4-igg-in-patients-in-the-optic-neuritis-treatment-trial
#5
John J Chen, W Oliver Tobin, Masoud Majed, Jiraporn Jitprapaikulsan, James P Fryer, Jacqueline A Leavitt, Eoin P Flanagan, Andrew McKeon, Sean J Pittock
Importance: Autoantibodies to aquaporin-4 (AQP4) and myelin oligodendrocyte glycoprotein (MOG) are recently established biomarkers of autoimmune optic neuritis whose frequency and accompanying phenotype, especially for MOG-IgG, are still being characterized. The Optic Neuritis Treatment Trial (ONTT) was a well-known randomized clinical trial in optic neuritis; therefore, knowledge of the serostatus and accompanying phenotype of these patients would be useful to determine the frequency of these antibodies in patients presenting with typical monocular optic neuritis and their outcomes...
April 1, 2018: JAMA Ophthalmology
https://www.readbyqxmd.com/read/29210929/optic-disc-edema-in-glial-fibrillary-acidic-protein-autoantibody-positive-meningoencephalitis
#6
John J Chen, Allen J Aksamit, Andrew McKeon, Sean J Pittock, Brian G Weinshenker, Jacqueline A Leavitt, Padraig P Morris, Eoin P Flanagan
BACKGROUND: Glial fibrillary acidic protein (GFAP) autoantibody-positive meningoencephalitis is a newly described entity characterized by a corticosteroid-responsive meningoencephalomyelitis. Some patients with GFAP autoantibody-positive meningoencephalitis have been found to have optic disc edema, which has previously not been well characterized. METHODS: We performed a retrospective, observational case series of Mayo Clinic patients found to have GFAP-IgG and optic disc edema from January 1, 2000, to December 31, 2016...
November 21, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/29131884/seizures-and-encephalitis-in-myelin-oligodendrocyte-glycoprotein-igg-disease-vs-aquaporin-4-igg-disease
#7
Shahd H M Hamid, Dan Whittam, Mariyam Saviour, Amal Alorainy, Kerry Mutch, Samantha Linaker, Tom Solomon, Maneesh Bhojak, Mark Woodhall, Patrick Waters, Richard Appleton, Martin Duddy, Anu Jacob
Importance: Antibodies to myelin oligodendrocyte glycoprotein IgG (MOG-IgG) are increasingly detected in patients with non-multiple sclerosis-related demyelination, some of whom manifest a neuromyelitis optica (NMO) phenotype. Cortical involvement, encephalopathy, and seizures are rare in aquaporin 4 antibody (AQP4-IgG)-related NMO in the white European population. However, the authors encountered several patients with seizures associated with MOG-IgG disease. Objective: To compare incidence of seizures and encephalitis-like presentation, or both between AQP4-IgG-positive and MOG-IgG-positive patients...
January 1, 2018: JAMA Neurology
https://www.readbyqxmd.com/read/28851393/pattern-ii-and-pattern-iii-ms-are-entities-distinct-from-pattern-i-ms-evidence-from-cerebrospinal-fluid-analysis
#8
S Jarius, F B König, I Metz, K Ruprecht, F Paul, W Brück, B Wildemann
BACKGROUND: The diagnosis of multiple sclerosis (MS) is currently based solely on clinical and magnetic resonance imaging features. However, histopathological studies have revealed four different patterns of lesion pathology in patients diagnosed with MS, suggesting that MS may be a pathologically heterogeneous syndrome rather than a single disease entity. OBJECTIVE: The aim of this study was to investigate whether patients with pattern I MS differ from patients with pattern II or III MS with regard to cerebrospinal fluid (CSF) findings, especially with reference to intrathecal IgG synthesis, which is found in most patients with MS but is frequently missing in MS mimics such as aquaporin-4-IgG-positive neuromyelitis optica spectrum disorders and myelin oligodendrocyte glycoprotein-IgG-positive encephalomyelitis...
August 29, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28831548/comparison-of-the-efficacy-of-azathioprine-and-rituximab-in-neuromyelitis-optica-spectrum-disorder-a-randomized-clinical-trial
#9
Zahra Nikoo, Shervin Badihian, Vahid Shaygannejad, Nasrin Asgari, Fereshteh Ashtari
Neuromyelitis optica spectrum disorder (NMOSD) often follows a relapsing course. As disability in NMOSD is attack-related, effective treatments are needed. We aimed to compare the efficacy of azathioprine (AZA) and rituximab (RIT) as maintenance therapy in NMOSD patients. An open, randomized clinical trial was conducted during September 2015 to December 2016, in Isfahan, Iran. Initially, 100 NMOSD patients were approached, 86 entered the study, and 68 cases completed the trial. All patients had a relapsing-remitting course with expanded disability extended scale (EDSS) ≤7 (median 2...
September 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28584663/clinical-pitfall-false-positive-aquaporin-4-igg-leading-to-misdiagnosis-of-neuromyelitis-optica-spectrum-disorder-in-patient-with-spinal-arteriovenous-fistula
#10
Suradech Suthiphosuwan, Jiwon Oh, Aditya Bharatha
INTRODUCTION: We report the cases of a 68-year-old male with a filum terminale arteriovenous fistula (AVF) who was initially misdiagnosed with neuromyelitis optica spectrum disorder (NMOSD) based on imaging findings and false-positive aquaporin-4 IgG (AQP4-IgG). CASE PRESENTATION: A 68-year-old male presented with slowly progressive weakness and numbness in his bilateral lower extremities. He was initially diagnosed with NMOSD and treated with immunosuppressive therapy based on findings of extensive spinal cord edema on magnetic resonance imaging (MRI) and initial negative spinal angiography as well as positive AQP4-IgG...
2017: Spinal Cord Series and Cases
https://www.readbyqxmd.com/read/28580877/clinical-commentary-on-aquaporin-4-igg-positive-neuromyelitis-optica-spectrum-disorder-with-recurrent-short-partial-transverse-myelitis-and-favorable-prognosis-two-new-cases-by-wang-et-al
#11
Eoin P Flanagan
No abstract text is available yet for this article.
June 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28580873/aquaporin-4-igg-positive-neuromyelitis-optica-spectrum-disorder-with-recurrent-short-partial-transverse-myelitis-and-favorable-prognosis-two-new-cases
#12
Jinhua Zhang, Fang Liu, Yiqi Wang, Ying Yang, Yuehong Huang, Hongchen Zhao, Yong Bi, Tianming Shi, Shunyuan Guo, Meiping Wang
Understanding the characteristics of neuromyelitis optica spectrum disorder (NMOSD) with recurrent short partial transverse myelitis (SPTM), which is very rare, contributes to the differential diagnosis of multiple sclerosis (MS). We present two Chinese aquaporin-4 immunoglobulin G (AQP4-IgG)-seropositive NMOSD cases who had at least twice SPTM during 4 and 6 years of follow-up, respectively. Their SPTMs have been mild and responded well to corticosteroids just like in the case of MS. The findings highlight the need of searching for serum AQP4-IgG (cell-based assay strongly recommended) in patients with recurrent SPTM and suggest that those patients may have a mild acute attack phase and favorable long-term prognosis...
December 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28391741/unexpected-exacerbations-following-initiation-of-disease-modifying-drugs-in-neuromyelitis-optica-spectrum-disorder-which-factor-is-responsible-anti-aquaporin-4-antibodies-b-cells-th1-cells-th2-cells-th17-cells-or-others
#13
Jun-Ichi Kira
Some disease-modifying drugs for multiple sclerosis, which mainly act on T cells, are ineffective for neuromyelitis optica spectrum disorder and induce unexpected relapses. These include interferon beta, glatiramer acetate, fingolimod, natalizumab, and alemtuzumab. The cases reported here suggest that dimethyl fumarate, which reduces the number of Th1 and Th17 cells and induces IL-4-producing Th2 cells, is also unsuitable for neuromyelitis optica spectrum disorder, irrespective of anti-aquaporin 4 IgG serostatus...
August 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28385199/neuromyelitis-spectrum-disorders
#14
REVIEW
Brian G Weinshenker, Dean M Wingerchuk
The understanding of neuromyelitis optica spectrum disorder (NMOSD) has evolved substantially since its initial description over a century ago. The discovery in 2004 of a pathogenic autoantibody biomarker targeting aquaporin 4 IgG revolutionized diagnosis and therapeutic development. Although NMOSD resembles multiple sclerosis (MS), differences were identified and articulated in the late 1990s. New diagnostic criteria incorporating the biomarker as well as better understanding of the clinical and radiologic features of NMOSD now permit accurate diagnosis and differentiation from MS...
April 2017: Mayo Clinic Proceedings
https://www.readbyqxmd.com/read/28271642/large-scale-in-house-cell-based-assay-for-evaluating-the-serostatus-in-patients-with-neuromyelitis-optica-spectrum-disorder-based-on-new-diagnostic-criteria
#15
Yeseul Kim, Gayoung Kim, Byung Soo Kong, Ji Eun Lee, Yu Mi Oh, Jae Won Hyun, Su Hyun Kim, AeRan Joung, Byoung Joon Kim, Kyungho Choi, Ho Jin Kim
BACKGROUND AND PURPOSE: The detection of aquaporin 4-IgG (AQP4-IgG) is now a critical diagnostic criterion for neuromyelitis optica spectrum disorder (NMOSD). To evaluate the serostatus of NMOSD patients based on the 2015 new diagnostic criteria using a new in-house cell-based assay (CBA). METHODS: We generated a stable cell line using internal ribosome entry site-containing bicistronic vectors, which allow the simultaneous expression of two proteins (AQP4 and green fluorescent protein) separately from the same RNA transcript...
April 2017: Journal of Clinical Neurology
https://www.readbyqxmd.com/read/28187806/diagnosis-and-management-of-spinal-cord-emergencies
#16
REVIEW
E P Flanagan, S J Pittock
Most spinal cord injury is seen with trauma. Nontraumatic spinal cord emergencies are discussed in this chapter. These myelopathies are rare but potentially devastating neurologic disorders. In some situations prior comorbidity (e.g., advanced cancer) provides a clue, but in others (e.g., autoimmune myelopathies) it may come with little warning. Neurologic examination helps distinguish spinal cord emergencies from peripheral nervous system emergencies (e.g., Guillain-Barré), although some features overlap...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28017203/pregnancy-in-neuromyelitis-optica-spectrum-disorder-a-multicenter-study-from-south-china
#17
MULTICENTER STUDY
Yanlu Huang, Yuge Wang, Yifan Zhou, Qiao Huang, Xiaobo Sun, Chen Chen, Ling Fang, Youming Long, Hui Yang, Honghao Wang, Caixia Li, Zhengqi Lu, Xueqiang Hu, Allan G Kermode, Wei Qiu
OBJECTIVE: This study aimed to assess the effect of pregnancy on the course of neuromyelitis optica spectrum disorder (NMOSD), and the effect of this disease on pregnancy outcomes. METHODS: Consecutive patients with NMOSD were recruited between September 2015 and April 2016 at an outpatient clinic from four referral institutes in South China. Demographic, clinical, and pregnancy data were retrieved by questionnaires to analyze the association between NMOSD and pregnancy, as well as the potential risk factors for relapse...
January 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/27354988/aquaporin-4-igg-autoimmune-syndrome-and-immunoreactivity-associated-with-thyroid-cancer
#18
Kerstin Soelberg, Stine R Larsen, Marlene T Moerch, Mads Thomassen, Klaus Brusgaard, Friedemannn Paul, Terry J Smith, Christian Godballe, Jakob Grauslund, Soeren T Lillevang, Nasrin Asgari
No abstract text is available yet for this article.
August 2016: Neurology® Neuroimmunology & Neuroinflammation
https://www.readbyqxmd.com/read/27112686/autoimmune-myelopathies
#19
REVIEW
Eoin P Flanagan
Autoimmune myelopathies are a heterogeneous group of immune-mediated spinal cord disorders with a broad differential diagnosis. They encompass myelopathies with an immune attack on the spinal cord (e.g., aquaporin-4-IgG (AQP4-IgG) seropositive neuromyelitis optica (NMO) and its spectrum disorders (NMOSD)), myelopathies occurring with systemic autoimmune disorders (which may also be due to coexisting NMO/NMOSD), paraneoplastic autoimmune myelopathies, postinfectious autoimmune myelopathies (e.g., acute disseminated encephalomyelitis), and myelopathies thought to be immune-related (e...
2016: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/26919719/b-cell-th17-and-neutrophil-related-cerebrospinal-fluid-cytokine-chemokines-are-elevated-in-mog-antibody-associated-demyelination
#20
Kavitha Kothur, Louise Wienholt, Esther M Tantsis, John Earl, Sushil Bandodkar, Kristina Prelog, Fiona Tea, Sudarshini Ramanathan, Fabienne Brilot, Russell C Dale
BACKGROUND: Myelin oligodendrocyte glycoprotein antibody (MOG Ab) associated demyelination represents a subgroup of autoimmune demyelination that is separate from multiple sclerosis and aquaporin 4 IgG-positive NMO, and can have a relapsing course. Unlike NMO and MS, there is a paucity of literature on immunopathology and CSF cytokine/chemokines in MOG Ab associated demyelination. AIM: To study the differences in immunopathogenesis based on cytokine/chemokine profile in MOG Ab-positive (POS) and -negative (NEG) groups...
2016: PloS One
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