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Musso G, Zoccarato M, Gallo N, Plebani M, Basso D. Hook-effect in MAGLUMI immunoassay for serum anti-GAD antibodies in neurological disorders: When "wrong" matrix is the right choice. Clin Chim Acta 2024; 558:119679. [PMID: 38642630 DOI: 10.1016/j.cca.2024.119679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 03/26/2024] [Accepted: 04/17/2024] [Indexed: 04/22/2024]
Abstract
Antibodies against glutamic acid decarboxylase (anti-GAD) are a valuable diagnostic tool to detect severe autoimmune conditions as type 1 diabetes mellitus (T1DM) and anti-GAD related neurological disorders, having the latter more often anti-GAD concentrations in serum multiple times higher than in the former. Automated immunoassays, either with ELISA or chemiluminescent technology, are validated for diagnostic use in serum with analytical ranges suitable for T1DM diagnosis. In a patient presenting with a suspected autoimmune ataxia, anti-GAD testing on an automated chemiluminescent immunoassay (CLIA) resulted in slightly abnormal concentrations in serum (39.2 KIU/L) and very high concentrations in CSF (>280 KIU/L), thus prompting to proceed to serum dilutions to exclude a false negative result and a misdiagnosis. Different dilutions of serum resulted in nonlinear concentrations with endpoint result of 276,500 KIU/L at dilution 1:1000. CSF dilution was instead linear with endpoint result of 4050 KIU/L. In this case report we found that anti-GAD testing in CSF was essential to establish the clinical diagnosis and to suspect hook-effect in serum due to the excess of autoantibodies in this severe autoimmune condition.
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Affiliation(s)
- G Musso
- Department of Medicine-DIMED, University of Padova, Padova, Italy; Laboratory Medicine Unit, University-Hospital of Padova, Padova, Italy.
| | - M Zoccarato
- Neurology Unit, Ospedale Sant'Antonio, University-Hospital of Padova, Padova, Italy
| | - N Gallo
- Laboratory Medicine Unit, University-Hospital of Padova, Padova, Italy
| | - M Plebani
- Department of Medicine-DIMED, University of Padova, Padova, Italy; Laboratory Medicine Unit, University-Hospital of Padova, Padova, Italy
| | - D Basso
- Department of Medicine-DIMED, University of Padova, Padova, Italy; Laboratory Medicine Unit, University-Hospital of Padova, Padova, Italy
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2
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Doughty CT, Schaefer PW, Brizzi K, Linnoila JJ. Case 14-2024: A 30-Year-Old Woman with Back Pain, Leg Stiffness, and Falls. N Engl J Med 2024; 390:1712-1719. [PMID: 38718362 DOI: 10.1056/nejmcpc2312733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Affiliation(s)
- Christopher T Doughty
- From the Department of Neurology, Brigham and Women's Hospital (C.T.D.), the Departments of Radiology (P.W.S.), Medicine (K.B.), and Neurology (K.B., J.J.L.), Massachusetts General Hospital, and the Departments of Neurology (C.T.D., K.B., J.J.L.), Radiology (P.W.S.), and Medicine (K.B., J.J.L.), Harvard Medical School - all in Boston
| | - Pamela W Schaefer
- From the Department of Neurology, Brigham and Women's Hospital (C.T.D.), the Departments of Radiology (P.W.S.), Medicine (K.B.), and Neurology (K.B., J.J.L.), Massachusetts General Hospital, and the Departments of Neurology (C.T.D., K.B., J.J.L.), Radiology (P.W.S.), and Medicine (K.B., J.J.L.), Harvard Medical School - all in Boston
| | - Kate Brizzi
- From the Department of Neurology, Brigham and Women's Hospital (C.T.D.), the Departments of Radiology (P.W.S.), Medicine (K.B.), and Neurology (K.B., J.J.L.), Massachusetts General Hospital, and the Departments of Neurology (C.T.D., K.B., J.J.L.), Radiology (P.W.S.), and Medicine (K.B., J.J.L.), Harvard Medical School - all in Boston
| | - Jenny J Linnoila
- From the Department of Neurology, Brigham and Women's Hospital (C.T.D.), the Departments of Radiology (P.W.S.), Medicine (K.B.), and Neurology (K.B., J.J.L.), Massachusetts General Hospital, and the Departments of Neurology (C.T.D., K.B., J.J.L.), Radiology (P.W.S.), and Medicine (K.B., J.J.L.), Harvard Medical School - all in Boston
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3
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Wang Y, Hu C, Aljarallah S, Reyes Mantilla M, Mukharesh L, Simpson A, Roy S, Harrison K, Shoemaker T, Comisac M, Balshi A, Obando D, Maldonado DAP, Koshorek J, Snoops S, Fitzgerald KC, Newsome SD. Expanding clinical profiles and prognostic markers in stiff person syndrome spectrum disorders. J Neurol 2024; 271:1861-1872. [PMID: 38078976 PMCID: PMC10973082 DOI: 10.1007/s00415-023-12123-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 11/15/2023] [Accepted: 11/19/2023] [Indexed: 03/28/2024]
Abstract
OBJECTIVE To describe the clinical features of a cohort of individuals with stiff person syndrome spectrum disorders (SPSD) and identify potential early predictors of future disability. BACKGROUND There is a need to better understand the full spectrum of clinical and paraclinical features and long-term impact of SPSD. DESIGN/METHODS Observational study from 1997 to 2022 at Johns Hopkins. Clinical phenotypes included classic SPS, partial SPS (limb or trunk limited), SPS-plus (classic features plus cerebellar/brainstem involvement), and progressive encephalomyelitis with rigidity and myoclonus (PERM). Outcome measures were modified Rankin scale (mRS) and use of assistive device for ambulation. Multivariate logistic regression was used to assess significant predictors of outcomes. RESULTS Cohort included 227 individuals with SPSD with mean follow-up of 10 years; 154 classic, 48 SPS-plus, 16 PERM, and 9 partial. Mean age at symptom onset was 42.9 ± 14.1 years, majority were white (69.2%) and female (75.8%). Median time to diagnosis was 36.2 months (longest for SPS-plus and PERM) and 61.2% were initially misdiagnosed. Most had systemic co-morbidities and required assistive devices for ambulation. Female sex (OR 2.08; CI 1.06-4.11) and initial brainstem/cerebellar involvement (OR 4.41; CI 1.63-14.33) predicted worse outcome by mRS. Older age at symptom onset (OR 1.04; CI 1.01-1.06), female sex (OR 1.99; CI 1.01-4.01), Black race (OR 4.14; CI 1.79-10.63), and initial brainstem/cerebellar involvement (OR 2.44; CI 1.04-7.19) predicted worse outcome by use of assistive device. Early implementation of immunotherapy was associated with better outcomes by either mRS (OR 0.45; CI 0.22-0.92) or use of assistive device (OR 0.79; CI 0.66-0.94). CONCLUSIONS We present the expanding phenotypic variability of this rare spectrum of disorders and highlight potential predictors of future disability.
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Affiliation(s)
- Yujie Wang
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA
- Department of Neurology, University of Washington School of Medicine, Seattle, WA, USA
| | - Chen Hu
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA
| | - Salman Aljarallah
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA
| | - Maria Reyes Mantilla
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA
| | - Loulwah Mukharesh
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA
| | - Alexandra Simpson
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA
| | - Shuvro Roy
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA
| | - Kimystian Harrison
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA
| | - Thomas Shoemaker
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA
| | - Michael Comisac
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA
| | - Alexandra Balshi
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA
| | - Danielle Obando
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA
| | - Daniela A Pimentel Maldonado
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA
| | - Jacqueline Koshorek
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA
| | - Sarah Snoops
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA
| | - Kathryn C Fitzgerald
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Scott D Newsome
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins Hospital, Johns Hopkins University School of Medicine, 600 N Wolfe St, Pathology 627, Baltimore, MD, 21287, USA.
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Hahn C, Budhram A, Alikhani K, AlOhaly N, Beecher G, Blevins G, Brooks J, Carruthers R, Comtois J, Cowan J, de Robles P, Hébert J, Kapadia RK, Lapointe S, Mackie A, Mason W, McLane B, Muccilli A, Poliakov I, Smyth P, Williams KG, Uy C, McCombe JA. Canadian Consensus Guidelines for the Diagnosis and Treatment of Autoimmune Encephalitis in Adults. Can J Neurol Sci 2024:1-21. [PMID: 38312020 DOI: 10.1017/cjn.2024.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2024]
Abstract
Autoimmune encephalitis is increasingly recognized as a neurologic cause of acute mental status changes with similar prevalence to infectious encephalitis. Despite rising awareness, approaches to diagnosis remain inconsistent and evidence for optimal treatment is limited. The following Canadian guidelines represent a consensus and evidence (where available) based approach to both the diagnosis and treatment of adult patients with autoimmune encephalitis. The guidelines were developed using a modified RAND process and included input from specialists in autoimmune neurology, neuropsychiatry and infectious diseases. These guidelines are targeted at front line clinicians and were created to provide a pragmatic and practical approach to managing such patients in the acute setting.
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Affiliation(s)
- Christopher Hahn
- Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada
| | - Adrian Budhram
- Clinical Neurological Sciences, London Health Sciences Centre, London, ON, Canada
- Department of Pathology and Laboratory Medicine, Western University, London Health Sciences Centre, London, ON, Canada
| | - Katayoun Alikhani
- Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada
| | - Nasser AlOhaly
- Division of Neurology, University of Toronto, Toronto, ON, Canada
| | - Grayson Beecher
- Division of Neurology, University of Alberta, Edmonton, AB, Canada
| | - Gregg Blevins
- Division of Neurology, University of Alberta, Edmonton, AB, Canada
| | - John Brooks
- Division of Neurology, University of Toronto, Toronto, ON, Canada
| | - Robert Carruthers
- Division of Neurology, University of British Columbia, Vancouver, BC, Canada
| | - Jacynthe Comtois
- Neurosciences, Universite de Montreal Faculte de Medecine, Montreal, QC, Canada
| | - Juthaporn Cowan
- Division of Infectious Diseases, Department of Medicine Ottawa Hospital, Ottawa, ON, Canada
| | - Paula de Robles
- Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada
- Department of Oncology, University of Calgary, Calgary, AB, Canada
| | - Julien Hébert
- Division of Neurology, University of Toronto, Toronto, ON, Canada
| | - Ronak K Kapadia
- Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada
| | - Sarah Lapointe
- Neurosciences, Universite de Montreal Faculte de Medecine, Montreal, QC, Canada
| | - Aaron Mackie
- Department of Psychiatry, University of Calgary, Calgary, AB, Canada
| | - Warren Mason
- Division of Neurology, University of Toronto, Toronto, ON, Canada
| | - Brienne McLane
- Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada
- Department of Psychiatry, University of Calgary, Calgary, AB, Canada
| | | | - Ilia Poliakov
- Division of Neurology, University of Saskatchewan College of Medicine, Saskatoon, SK, Canada
| | - Penelope Smyth
- Division of Neurology, University of Alberta, Edmonton, AB, Canada
| | | | - Christopher Uy
- Division of Neurology, University of British Columbia, Vancouver, BC, Canada
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5
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Jeantin L, Gales A, Berzero G, Leu S, Proust J, Giry M, Valyraki NE, Birzu C, Alentorn A, Vidailhet M, Psimaras D, Arnulf I. Hypersomnia in anti-glutamic acid decarboxylase 65 (GAD65) associated neurological syndromes: A pilot study. Eur J Neurol 2024; 31:e16125. [PMID: 37922501 DOI: 10.1111/ene.16125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/28/2023] [Accepted: 10/18/2023] [Indexed: 11/05/2023]
Abstract
BACKGROUND AND PURPOSE Despite their detrimental impact on the quality of life in autoimmune encephalitis, sleep disorders have not been investigated in anti-glutamic acid decarboxylase (GAD65) associated neurological syndromes. METHODS Six consecutive adult patients diagnosed with anti-GAD65-associated neurological syndromes (four with limbic encephalitis and two with stiff-person syndrome) and 12 healthy controls were enrolled. Participants underwent sleep interviews and sleep studies including night-time video-polysomnography, followed by five daytime multiple sleep latency tests (MSLTs, to assess propensity to fall asleep) and an 18 h bed rest polysomnography (to assess excessive sleep need). RESULTS Patients reported the need for daily naps and that their cognition and quality of life were altered by sleepiness, but they had normal scores on the Epworth sleepiness scale. Compared with controls, sleep latencies during the MSLT were shorter in the patient group (median 5.8 min, interquartile range [IQR] 4.5, 6.0 vs. 17.7 min, IQR 16.3, 19.7, p = 0.001), and the arousal index was reduced (2.5/h, IQR 2.3, 3.0 vs. 22.3/h, IQR 13.8, 30.0, p = 0.002), although total sleep time was similar between groups (621 min, IQR 464, 651 vs. 542.5 min, IQR 499, 582, p = 0.51). Remarkably, all six patients had MSLT latencies ≤8 min, indicating severe sleepiness. No parasomnia or sleep-disordered breathing was detected. CONCLUSION Central hypersomnia is a relevant characteristic of anti-GAD65-associated neurological syndromes.
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Affiliation(s)
- Lina Jeantin
- Sleep Disorders Unit, R3S Department, Pitié-Salpêtrière Hospital, AP-HP Sorbonne University, Paris, France
| | - Ana Gales
- Sleep Disorders Unit, R3S Department, Pitié-Salpêtrière Hospital, AP-HP Sorbonne University, Paris, France
| | - Giulia Berzero
- Neuro-Oncology Unit, Neurology Department, Pitié-Salpêtrière Hospital, AP-HP Sorbonne University, Paris, France
| | - Smaranda Leu
- Sleep Disorders Unit, R3S Department, Pitié-Salpêtrière Hospital, AP-HP Sorbonne University, Paris, France
| | - Jérémy Proust
- Sleep Disorders Unit, R3S Department, Pitié-Salpêtrière Hospital, AP-HP Sorbonne University, Paris, France
| | - Marine Giry
- Neuro-Oncology Unit, Neurology Department, Pitié-Salpêtrière Hospital, AP-HP Sorbonne University, Paris, France
| | - Nefeli Eirini Valyraki
- Neuro-Oncology Unit, Neurology Department, Pitié-Salpêtrière Hospital, AP-HP Sorbonne University, Paris, France
| | - Cristina Birzu
- Neuro-Oncology Unit, Neurology Department, Pitié-Salpêtrière Hospital, AP-HP Sorbonne University, Paris, France
| | - Agusti Alentorn
- Neuro-Oncology Unit, Neurology Department, Pitié-Salpêtrière Hospital, AP-HP Sorbonne University, Paris, France
| | - Marie Vidailhet
- Movement Disorder Unit, Neurology Department, Pitié-Salpêtrière Hospital, Paris, France
| | - Dimitri Psimaras
- Neuro-Oncology Unit, Neurology Department, Pitié-Salpêtrière Hospital, AP-HP Sorbonne University, Paris, France
| | - Isabelle Arnulf
- Sleep Disorders Unit, R3S Department, Pitié-Salpêtrière Hospital, AP-HP Sorbonne University, Paris, France
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6
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Wagner B, Irani S. Autoimmune and paraneoplastic seizures. HANDBOOK OF CLINICAL NEUROLOGY 2024; 200:151-172. [PMID: 38494275 DOI: 10.1016/b978-0-12-823912-4.00009-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Seizures are a common feature of autoimmune encephalitis and are especially prevalent in patients with the commonest autoantibodies, against LGI1, CASPR2 and the NMDA, GABAB, and GABAA receptors. In this chapter, we discuss the classification, clinical, investigation, and treatment aspects of patients with these, and other autoantibody-mediated and -associated, illnesses. We highlight distinctive and common seizure semiologies which, often alongside other features we outline, can help the clinical diagnosis of an autoantibody-associated syndrome. Next, we classify these syndromes by either focusing on whether they represent underlying causative autoantibodies or T-cell-mediated syndromes and on the distinction between acute symptomatic seizures and a more enduring tendency to autoimmune-associated epilepsy, a practical and valuable distinction for both patients and clinicians which relates to the pathogenesis. We emphasize the more effective immunotherapy response in patients with causative autoantibodies, and discuss the emerging evidence for various first-, second-, and third-line immunotherapies. Finally, we highlight available clinical rating scales which can guide autoantibody testing and immunotherapy in patients with seizures of unknown etiology. Throughout, we relate the clinical and therapeutic observations to the immunobiology and neuroscience which drive these seizures.
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Affiliation(s)
- Barbara Wagner
- Neuroscience Department, NDCN, University of Oxford and Oxford University Hospitals, Oxford, United Kingdom; Kantonsspital Aarau Switzerland, Tellstrasse, Aarau, Switzerland
| | - Sarosh Irani
- Neuroscience Department, NDCN, University of Oxford and Oxford University Hospitals, Oxford, United Kingdom.
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7
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Shelly S, Dubey D, Mills JR, Klein CJ. Paraneoplastic neuropathies and peripheral nerve hyperexcitability disorders. HANDBOOK OF CLINICAL NEUROLOGY 2024; 200:239-273. [PMID: 38494281 DOI: 10.1016/b978-0-12-823912-4.00020-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Peripheral neuropathy is a common referral for patients to the neurologic clinics. Paraneoplastic neuropathies account for a small but high morbidity and mortality subgroup. Symptoms include weakness, sensory loss, sweating irregularity, blood pressure instability, severe constipation, and neuropathic pain. Neuropathy is the first presenting symptom of malignancy among many patients. The molecular and cellular oncogenic immune targets reside within cell bodies, axons, cytoplasms, or surface membranes of neural tissues. A more favorable immune treatment outcome occurs in those where the targets reside on the cell surface. Patients with antibodies binding cell surface antigens commonly have neural hyperexcitability with pain, cramps, fasciculations, and hyperhidrotic attacks (CASPR2, LGI1, and others). The antigenic targets are also commonly expressed in the central nervous system, with presenting symptoms being myelopathy, encephalopathy, and seizures with neuropathy, often masked. Pain and autonomic components typically relate to small nerve fiber involvement (nociceptive, adrenergic, enteric, and sudomotor), sometimes without nerve fiber loss but rather hyperexcitability. The specific antibodies discovered help direct cancer investigations. Among the primary axonal paraneoplastic neuropathies, pathognomonic clinical features do not exist, and testing for multiple antibodies simultaneously provides the best sensitivity in testing (AGNA1-SOX1; amphiphysin; ANNA-1-HU; ANNA-3-DACH1; CASPR2; CRMP5; LGI1; PCA2-MAP1B, and others). Performing confirmatory antibody testing using adjunct methods improves specificity. Antibody-mediated demyelinating paraneoplastic neuropathies are limited to MAG-IgM (IgM-MGUS, Waldenström's, and myeloma), with the others associated with cytokine elevations (VEGF, IL6) caused by osteosclerotic myeloma, plasmacytoma (POEMS), and rarely angiofollicular lymphoma (Castleman's). Paraneoplastic disorders have clinical overlap with other idiopathic antibody disorders, including IgG4 demyelinating nodopathies (NF155 and Contactin-1). This review summarizes the paraneoplastic neuropathies, including those with peripheral nerve hyperexcitability.
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Affiliation(s)
- Shahar Shelly
- Department of Neurology, Mayo Clinic, Rochester, MN, United States; Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, United States; Department of Neurology, Rambam Health Care Campus, Haifa, Israel; Faculty of Medicine, Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Divyanshu Dubey
- Department of Neurology, Mayo Clinic, Rochester, MN, United States; Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, United States
| | - John R Mills
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, United States
| | - Christopher J Klein
- Department of Neurology, Mayo Clinic, Rochester, MN, United States; Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, United States.
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8
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Budhram A, Flanagan EP. Optimizing the diagnostic performance of neural antibody testing for paraneoplastic and autoimmune encephalitis in clinical practice. HANDBOOK OF CLINICAL NEUROLOGY 2024; 200:365-382. [PMID: 38494290 DOI: 10.1016/b978-0-12-823912-4.00002-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
The detection of neural antibodies in patients with paraneoplastic and autoimmune encephalitis has majorly advanced the diagnosis and management of neural antibody-associated diseases. Although testing for these antibodies has historically been restricted to specialized centers, assay commercialization has made this testing available to clinical chemistry laboratories worldwide. This improved test accessibility has led to reduced turnaround time and expedited diagnosis, which are beneficial to patient care. However, as the utilization of these assays has increased, so too has the need to evaluate how they perform in the clinical setting. In this chapter, we discuss assays for neural antibody detection that are in routine use, draw attention to their limitations and provide strategies to help clinicians and laboratorians overcome them, all with the aim of optimizing neural antibody testing for paraneoplastic and autoimmune encephalitis in clinical practice.
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Affiliation(s)
- Adrian Budhram
- Department of Clinical Neurological Sciences, Western University, London Health Sciences Centre, London, ON, Canada; Department of Pathology and Laboratory Medicine, Western University, London Health Sciences Centre, London, ON, Canada.
| | - Eoin P Flanagan
- Department of Neurology, Mayo Clinic, Rochester, MN, United States; Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, United States
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9
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Kadish R, Clardy SL. Epidemiology of paraneoplastic neurologic syndromes. HANDBOOK OF CLINICAL NEUROLOGY 2024; 200:57-77. [PMID: 38494297 DOI: 10.1016/b978-0-12-823912-4.00011-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Paraneoplastic neurologic syndromes (PNS), initially depicted as seemingly cryptic remote manifestations of malignancy, were first described clinically in the early 20th century, with pathophysiologic correlates becoming better elucidated in the latter half of the century. There remain many questions not only about the pathophysiology but also regarding the epidemiology of these conditions. The continuous discovery of novel autoantigens and related neurologic disease has broadened the association in classical PNS to include conditions such as paraneoplastic cerebellar degeneration. It has also brought into focus several other neurologic syndromes with a putative neoplastic association. These conditions are overall rare, making it difficult to capture large numbers of patients to study, and raising the question of whether incidence is increasing over time or improved identification is driving the increased numbers of cases. With the rise and increasing use of immunotherapy for cancer treatment, the incidence of these conditions is additionally expected to rise and may present with various clinical symptoms. As we enter an era of clinical trial intervention in these conditions, much work is needed to capture more granular data on population groups defined by socioeconomic characteristics such as age, ethnicity, economic resources, and gender to optimize care and clinical trial planning.
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Affiliation(s)
- Robert Kadish
- Department of Neurology, University of Utah, Salt Lake City, UT, United States
| | - Stacey L Clardy
- Department of Neurology, University of Utah, Salt Lake City, UT, United States; George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, UT, United States.
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10
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Zoccarato M, Grisold W. Paraneoplastic neurologic manifestations of neuroendocrine tumors. HANDBOOK OF CLINICAL NEUROLOGY 2024; 200:397-407. [PMID: 38494292 DOI: 10.1016/b978-0-12-823912-4.00023-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Neuroendocrine neoplasms (NENs) are a heterogeneous group of tumors arising from the transformation of neuroendocrine cells in several organs, most notably the gastro-entero-pancreatic system and respiratory tract. The classification was recently revised in the 5th Edition of the WHO Classification of Endocrine and Neuroendocrine Tumors. NENs can rarely spread to the central or peripheral nervous systems. Neurologic involvement is determined by the rare development of paraneoplastic syndromes, which are remote effects of cancer. Mechanisms depend on immunologic response to a tumor, leading to the immune attack on the nervous system or the production of biologically active ("functioning") substances, which can determine humoral (endocrine) effects with neurologic manifestations. Paraneoplastic neurologic syndromes (PNS) are immunologically mediated and frequently detected in small cell lung cancer but rarely seen in other forms of NEN. PNS and Merkel cell carcinoma is increasingly reported, especially with Lambert Eaton myasthenic syndrome. Endocrine manifestations are found in a wide spectrum of NENs. They can develop at any stage of the diseases and determine neurologic manifestations. Patient outcomes are influenced by tumor prognosis, neurologic complications, and the severity of endocrine effects.
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Affiliation(s)
- Marco Zoccarato
- Neurology Unit O.S.A., Azienda Ospedale-Università di Padova, Padova, Italy
| | - Wolfgang Grisold
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria.
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11
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Casagrande S, Zuliani L, Grisold W. Paraneoplastic encephalitis. HANDBOOK OF CLINICAL NEUROLOGY 2024; 200:131-149. [PMID: 38494274 DOI: 10.1016/b978-0-12-823912-4.00019-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
The first reports of encephalitis associated with cancer date to the 1960s and were characterized by clinical and pathologic involvement of limbic areas. This specific association was called limbic encephalitis (LE). The subsequent discovery of several "onconeural" antibodies (Abs), i.e., Abs targeting an antigen shared by neurons and tumor cells, supported the hypothesis of an autoimmune paraneoplastic etiology of LE and other forms of rapidly progressive encephalopathy. Over the past 20 years, similar clinical pictures with different clinical courses have been described in association with novel Abs-binding neuronal membrane proteins and proved to be pathogenic. The most well-known encephalitis in this group was described in 2007 as an association of a complex neuro-psychiatric syndrome, N-methyl-d-aspartate (NMDA) receptor-Abs, and ovarian teratoma in young women. Later on, nonparaneoplastic cases of NMDA receptor encephalitis were also described. Since then, the historical concept of LE and Ab associated encephalitis has changed. Some of these occur in fact more commonly in the absence of a malignancy (e.g., anti-LG1 Abs). Lastly, seronegative cases were also described. The term paraneoplastic encephalitis nowadays encompasses different syndromes that may be triggered by occult tumors.
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Affiliation(s)
- Silvia Casagrande
- Neurology Unit, Rovereto Hospital, Trento, Italy; Department of Neurosciences, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy.
| | - Luigi Zuliani
- Department of Neurology, San Bortolo Hospital, Azienda ULSS8 Berica, Vicenza, Italy
| | - Wolfgang Grisold
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria
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Ryding M, Mikkelsen AW, Nissen MS, Nilsson AC, Blaabjerg M. Pathophysiological Effects of Autoantibodies in Autoimmune Encephalitides. Cells 2023; 13:15. [PMID: 38201219 PMCID: PMC10778077 DOI: 10.3390/cells13010015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/15/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024] Open
Abstract
The heterogeneity of autoantibody targets in autoimmune encephalitides presents a challenge for understanding cellular and humoral pathophysiology, and the development of new treatment strategies. Thus, current treatment aims at autoantibody removal and immunosuppression, and is primarily based on data generated from other autoimmune neurological diseases and expert consensus. There are many subtypes of autoimmune encephalitides, which now entails both diseases with autoantibodies targeting extracellular antigens and classical paraneoplastic syndromes with autoantibodies targeting intracellular antigens. Here, we review the current knowledge of molecular and cellular effects of autoantibodies associated with autoimmune encephalitis, and evaluate the evidence behind the proposed pathophysiological mechanisms of autoantibodies in autoimmune encephalitis.
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Affiliation(s)
- Matias Ryding
- Department of Clinical Research, University of Southern Denmark, 5000 Odense, Denmark;
- Neurobiology Research, Institute of Molecular Medicine, University of Southern Denmark, 5000 Odense, Denmark
| | - Anne With Mikkelsen
- Department of Clinical Immunology, Odense University Hospital, 5000 Odense, Denmark;
| | | | - Anna Christine Nilsson
- Department of Clinical Research, University of Southern Denmark, 5000 Odense, Denmark;
- Department of Clinical Immunology, Odense University Hospital, 5000 Odense, Denmark;
| | - Morten Blaabjerg
- Department of Clinical Research, University of Southern Denmark, 5000 Odense, Denmark;
- Neurobiology Research, Institute of Molecular Medicine, University of Southern Denmark, 5000 Odense, Denmark
- Department of Neurology, Odense University Hospital, 5000 Odense, Denmark;
- Brain Research—Inter Disciplinary Guided Excellence (BRIDGE), 5000 Odense, Denmark
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13
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Matsui N, Tanaka K, Ishida M, Yamamoto Y, Matsubara Y, Saika R, Iizuka T, Nakamura K, Kuriyama N, Matsui M, Arisawa K, Nakamura Y, Kaji R, Kuwabara S, Izumi Y. Prevalence, Clinical Profiles, and Prognosis of Stiff-Person Syndrome in a Japanese Nationwide Survey. NEUROLOGY(R) NEUROIMMUNOLOGY & NEUROINFLAMMATION 2023; 10:e200165. [PMID: 37739810 PMCID: PMC10519438 DOI: 10.1212/nxi.0000000000200165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 07/17/2023] [Indexed: 09/24/2023]
Abstract
BACKGROUND AND OBJECTIVES To elucidate current epidemiologic, clinical, and immunologic profiles and treatments of stiff-person syndrome (SPS) in Japan. METHODS A nationwide mail survey was conducted using an established method. Data processing sheets were sent to randomly selected departments of internal medicine, neurology, pediatrics, psychiatry, and neurosurgery in hospitals and clinics throughout Japan to identify patients with SPS who were seen between January 2015 and December 2017. RESULTS Thirty cases were identified as glutamic acid decarboxylase 65 (GAD65)-positive SPS cases on the basis of detailed clinical data of 55 cases. Four patients had α1 subunit of glycine receptor (GlyR) antibodies, and 1 patient had both GAD65 and GlyR antibodies. The total estimated number of patients with GAD65-positive SPS was 140, and the estimated prevalence was 0.11 per 100,000 population. The median age at onset was 51 years (range, 26-83 years), and 23 (76%) were female. Of these, 70% had classic SPS, and 30% had stiff-limb syndrome. The median time from symptom onset to diagnosis was significantly longer in the high-titer GAD65 antibody group than in the low-titer group (13 months vs 2.5 months, p = 0.01). The median modified Rankin Scale (mRS) at baseline was 4, and the median mRS at the last follow-up was 2. Among the 29 GAD65-positive patients with ≥1 year follow-up, 7 received only symptomatic treatment, 9 underwent immunotherapy without long-term immunotherapy, and 13 received long-term immunotherapy such as oral prednisolone. The coexistence of type 1 diabetes mellitus and the lack of long-term immunotherapy were independent risk factors for poor outcome (mRS ≥3) in the GAD65-positive patients (odds ratio, 15.0; 95% CI 2.6-131.6; p = 0.001; odds ratio, 19.8; 95% CI 3.2-191.5; p = 0.001, respectively). DISCUSSION This study provides the current epidemiologic and clinical status of SPS in Japan. The symptom onset to the diagnosis of SPS was longer in patients with high-titer GAD65 antibodies than in those with low-titer GAD65 antibodies. The outcome of patients with SPS was generally favorable, but more aggressive immunotherapies are necessary for GAD65-positive patients with SPS.
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Affiliation(s)
- Naoko Matsui
- From the Department of Neurology (N.M., M.I., Y.I.), Tokushima University Graduate School of Biomedical Sciences; Department of Animal Model Development (K.T.), Brain Research Institute, Niigata University; Department of Multiple Sclerosis Therapeutics (K.T.), Fukushima Medical University, School of Medicine; Department of Neurology (Y.Y.), Tokushima University Hospital; Department of Public Health (Y.M., Y.N.), Jichi Medical University, Shimotsuke; Department of Neurology (R.S.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (T.I.), Kitasato University School of Medicine, Sagamihara; Department of Public Health and Hygiene (K.N.), Graduate School of Medicine, University of the Ryukyus, Okinawa; Department of Epidemiology for Community Health and Medicine (N.K.), Kyoto Prefectural University of Medicine; Department of Social Health Medicine (N.K.), Shizuoka Graduate University of Public Health; Department of Neurology (M.M.), Kanazawa Medical University, Ishikawa; Department of Preventive Medicine (K.A.), Tokushima University Graduate School of Biomedical Sciences; National Hospital Organization Utano Hospital (R.K.), Kyoto; and Department of Neurology (S.K.), Graduate School of Medicine, Chiba University, Japan
| | - Keiko Tanaka
- From the Department of Neurology (N.M., M.I., Y.I.), Tokushima University Graduate School of Biomedical Sciences; Department of Animal Model Development (K.T.), Brain Research Institute, Niigata University; Department of Multiple Sclerosis Therapeutics (K.T.), Fukushima Medical University, School of Medicine; Department of Neurology (Y.Y.), Tokushima University Hospital; Department of Public Health (Y.M., Y.N.), Jichi Medical University, Shimotsuke; Department of Neurology (R.S.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (T.I.), Kitasato University School of Medicine, Sagamihara; Department of Public Health and Hygiene (K.N.), Graduate School of Medicine, University of the Ryukyus, Okinawa; Department of Epidemiology for Community Health and Medicine (N.K.), Kyoto Prefectural University of Medicine; Department of Social Health Medicine (N.K.), Shizuoka Graduate University of Public Health; Department of Neurology (M.M.), Kanazawa Medical University, Ishikawa; Department of Preventive Medicine (K.A.), Tokushima University Graduate School of Biomedical Sciences; National Hospital Organization Utano Hospital (R.K.), Kyoto; and Department of Neurology (S.K.), Graduate School of Medicine, Chiba University, Japan
| | - Mitsuyo Ishida
- From the Department of Neurology (N.M., M.I., Y.I.), Tokushima University Graduate School of Biomedical Sciences; Department of Animal Model Development (K.T.), Brain Research Institute, Niigata University; Department of Multiple Sclerosis Therapeutics (K.T.), Fukushima Medical University, School of Medicine; Department of Neurology (Y.Y.), Tokushima University Hospital; Department of Public Health (Y.M., Y.N.), Jichi Medical University, Shimotsuke; Department of Neurology (R.S.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (T.I.), Kitasato University School of Medicine, Sagamihara; Department of Public Health and Hygiene (K.N.), Graduate School of Medicine, University of the Ryukyus, Okinawa; Department of Epidemiology for Community Health and Medicine (N.K.), Kyoto Prefectural University of Medicine; Department of Social Health Medicine (N.K.), Shizuoka Graduate University of Public Health; Department of Neurology (M.M.), Kanazawa Medical University, Ishikawa; Department of Preventive Medicine (K.A.), Tokushima University Graduate School of Biomedical Sciences; National Hospital Organization Utano Hospital (R.K.), Kyoto; and Department of Neurology (S.K.), Graduate School of Medicine, Chiba University, Japan
| | - Yohei Yamamoto
- From the Department of Neurology (N.M., M.I., Y.I.), Tokushima University Graduate School of Biomedical Sciences; Department of Animal Model Development (K.T.), Brain Research Institute, Niigata University; Department of Multiple Sclerosis Therapeutics (K.T.), Fukushima Medical University, School of Medicine; Department of Neurology (Y.Y.), Tokushima University Hospital; Department of Public Health (Y.M., Y.N.), Jichi Medical University, Shimotsuke; Department of Neurology (R.S.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (T.I.), Kitasato University School of Medicine, Sagamihara; Department of Public Health and Hygiene (K.N.), Graduate School of Medicine, University of the Ryukyus, Okinawa; Department of Epidemiology for Community Health and Medicine (N.K.), Kyoto Prefectural University of Medicine; Department of Social Health Medicine (N.K.), Shizuoka Graduate University of Public Health; Department of Neurology (M.M.), Kanazawa Medical University, Ishikawa; Department of Preventive Medicine (K.A.), Tokushima University Graduate School of Biomedical Sciences; National Hospital Organization Utano Hospital (R.K.), Kyoto; and Department of Neurology (S.K.), Graduate School of Medicine, Chiba University, Japan
| | - Yuri Matsubara
- From the Department of Neurology (N.M., M.I., Y.I.), Tokushima University Graduate School of Biomedical Sciences; Department of Animal Model Development (K.T.), Brain Research Institute, Niigata University; Department of Multiple Sclerosis Therapeutics (K.T.), Fukushima Medical University, School of Medicine; Department of Neurology (Y.Y.), Tokushima University Hospital; Department of Public Health (Y.M., Y.N.), Jichi Medical University, Shimotsuke; Department of Neurology (R.S.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (T.I.), Kitasato University School of Medicine, Sagamihara; Department of Public Health and Hygiene (K.N.), Graduate School of Medicine, University of the Ryukyus, Okinawa; Department of Epidemiology for Community Health and Medicine (N.K.), Kyoto Prefectural University of Medicine; Department of Social Health Medicine (N.K.), Shizuoka Graduate University of Public Health; Department of Neurology (M.M.), Kanazawa Medical University, Ishikawa; Department of Preventive Medicine (K.A.), Tokushima University Graduate School of Biomedical Sciences; National Hospital Organization Utano Hospital (R.K.), Kyoto; and Department of Neurology (S.K.), Graduate School of Medicine, Chiba University, Japan
| | - Reiko Saika
- From the Department of Neurology (N.M., M.I., Y.I.), Tokushima University Graduate School of Biomedical Sciences; Department of Animal Model Development (K.T.), Brain Research Institute, Niigata University; Department of Multiple Sclerosis Therapeutics (K.T.), Fukushima Medical University, School of Medicine; Department of Neurology (Y.Y.), Tokushima University Hospital; Department of Public Health (Y.M., Y.N.), Jichi Medical University, Shimotsuke; Department of Neurology (R.S.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (T.I.), Kitasato University School of Medicine, Sagamihara; Department of Public Health and Hygiene (K.N.), Graduate School of Medicine, University of the Ryukyus, Okinawa; Department of Epidemiology for Community Health and Medicine (N.K.), Kyoto Prefectural University of Medicine; Department of Social Health Medicine (N.K.), Shizuoka Graduate University of Public Health; Department of Neurology (M.M.), Kanazawa Medical University, Ishikawa; Department of Preventive Medicine (K.A.), Tokushima University Graduate School of Biomedical Sciences; National Hospital Organization Utano Hospital (R.K.), Kyoto; and Department of Neurology (S.K.), Graduate School of Medicine, Chiba University, Japan
| | - Takahiro Iizuka
- From the Department of Neurology (N.M., M.I., Y.I.), Tokushima University Graduate School of Biomedical Sciences; Department of Animal Model Development (K.T.), Brain Research Institute, Niigata University; Department of Multiple Sclerosis Therapeutics (K.T.), Fukushima Medical University, School of Medicine; Department of Neurology (Y.Y.), Tokushima University Hospital; Department of Public Health (Y.M., Y.N.), Jichi Medical University, Shimotsuke; Department of Neurology (R.S.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (T.I.), Kitasato University School of Medicine, Sagamihara; Department of Public Health and Hygiene (K.N.), Graduate School of Medicine, University of the Ryukyus, Okinawa; Department of Epidemiology for Community Health and Medicine (N.K.), Kyoto Prefectural University of Medicine; Department of Social Health Medicine (N.K.), Shizuoka Graduate University of Public Health; Department of Neurology (M.M.), Kanazawa Medical University, Ishikawa; Department of Preventive Medicine (K.A.), Tokushima University Graduate School of Biomedical Sciences; National Hospital Organization Utano Hospital (R.K.), Kyoto; and Department of Neurology (S.K.), Graduate School of Medicine, Chiba University, Japan
| | - Koshi Nakamura
- From the Department of Neurology (N.M., M.I., Y.I.), Tokushima University Graduate School of Biomedical Sciences; Department of Animal Model Development (K.T.), Brain Research Institute, Niigata University; Department of Multiple Sclerosis Therapeutics (K.T.), Fukushima Medical University, School of Medicine; Department of Neurology (Y.Y.), Tokushima University Hospital; Department of Public Health (Y.M., Y.N.), Jichi Medical University, Shimotsuke; Department of Neurology (R.S.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (T.I.), Kitasato University School of Medicine, Sagamihara; Department of Public Health and Hygiene (K.N.), Graduate School of Medicine, University of the Ryukyus, Okinawa; Department of Epidemiology for Community Health and Medicine (N.K.), Kyoto Prefectural University of Medicine; Department of Social Health Medicine (N.K.), Shizuoka Graduate University of Public Health; Department of Neurology (M.M.), Kanazawa Medical University, Ishikawa; Department of Preventive Medicine (K.A.), Tokushima University Graduate School of Biomedical Sciences; National Hospital Organization Utano Hospital (R.K.), Kyoto; and Department of Neurology (S.K.), Graduate School of Medicine, Chiba University, Japan
| | - Nagato Kuriyama
- From the Department of Neurology (N.M., M.I., Y.I.), Tokushima University Graduate School of Biomedical Sciences; Department of Animal Model Development (K.T.), Brain Research Institute, Niigata University; Department of Multiple Sclerosis Therapeutics (K.T.), Fukushima Medical University, School of Medicine; Department of Neurology (Y.Y.), Tokushima University Hospital; Department of Public Health (Y.M., Y.N.), Jichi Medical University, Shimotsuke; Department of Neurology (R.S.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (T.I.), Kitasato University School of Medicine, Sagamihara; Department of Public Health and Hygiene (K.N.), Graduate School of Medicine, University of the Ryukyus, Okinawa; Department of Epidemiology for Community Health and Medicine (N.K.), Kyoto Prefectural University of Medicine; Department of Social Health Medicine (N.K.), Shizuoka Graduate University of Public Health; Department of Neurology (M.M.), Kanazawa Medical University, Ishikawa; Department of Preventive Medicine (K.A.), Tokushima University Graduate School of Biomedical Sciences; National Hospital Organization Utano Hospital (R.K.), Kyoto; and Department of Neurology (S.K.), Graduate School of Medicine, Chiba University, Japan
| | - Makoto Matsui
- From the Department of Neurology (N.M., M.I., Y.I.), Tokushima University Graduate School of Biomedical Sciences; Department of Animal Model Development (K.T.), Brain Research Institute, Niigata University; Department of Multiple Sclerosis Therapeutics (K.T.), Fukushima Medical University, School of Medicine; Department of Neurology (Y.Y.), Tokushima University Hospital; Department of Public Health (Y.M., Y.N.), Jichi Medical University, Shimotsuke; Department of Neurology (R.S.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (T.I.), Kitasato University School of Medicine, Sagamihara; Department of Public Health and Hygiene (K.N.), Graduate School of Medicine, University of the Ryukyus, Okinawa; Department of Epidemiology for Community Health and Medicine (N.K.), Kyoto Prefectural University of Medicine; Department of Social Health Medicine (N.K.), Shizuoka Graduate University of Public Health; Department of Neurology (M.M.), Kanazawa Medical University, Ishikawa; Department of Preventive Medicine (K.A.), Tokushima University Graduate School of Biomedical Sciences; National Hospital Organization Utano Hospital (R.K.), Kyoto; and Department of Neurology (S.K.), Graduate School of Medicine, Chiba University, Japan
| | - Kokichi Arisawa
- From the Department of Neurology (N.M., M.I., Y.I.), Tokushima University Graduate School of Biomedical Sciences; Department of Animal Model Development (K.T.), Brain Research Institute, Niigata University; Department of Multiple Sclerosis Therapeutics (K.T.), Fukushima Medical University, School of Medicine; Department of Neurology (Y.Y.), Tokushima University Hospital; Department of Public Health (Y.M., Y.N.), Jichi Medical University, Shimotsuke; Department of Neurology (R.S.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (T.I.), Kitasato University School of Medicine, Sagamihara; Department of Public Health and Hygiene (K.N.), Graduate School of Medicine, University of the Ryukyus, Okinawa; Department of Epidemiology for Community Health and Medicine (N.K.), Kyoto Prefectural University of Medicine; Department of Social Health Medicine (N.K.), Shizuoka Graduate University of Public Health; Department of Neurology (M.M.), Kanazawa Medical University, Ishikawa; Department of Preventive Medicine (K.A.), Tokushima University Graduate School of Biomedical Sciences; National Hospital Organization Utano Hospital (R.K.), Kyoto; and Department of Neurology (S.K.), Graduate School of Medicine, Chiba University, Japan
| | - Yosikazu Nakamura
- From the Department of Neurology (N.M., M.I., Y.I.), Tokushima University Graduate School of Biomedical Sciences; Department of Animal Model Development (K.T.), Brain Research Institute, Niigata University; Department of Multiple Sclerosis Therapeutics (K.T.), Fukushima Medical University, School of Medicine; Department of Neurology (Y.Y.), Tokushima University Hospital; Department of Public Health (Y.M., Y.N.), Jichi Medical University, Shimotsuke; Department of Neurology (R.S.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (T.I.), Kitasato University School of Medicine, Sagamihara; Department of Public Health and Hygiene (K.N.), Graduate School of Medicine, University of the Ryukyus, Okinawa; Department of Epidemiology for Community Health and Medicine (N.K.), Kyoto Prefectural University of Medicine; Department of Social Health Medicine (N.K.), Shizuoka Graduate University of Public Health; Department of Neurology (M.M.), Kanazawa Medical University, Ishikawa; Department of Preventive Medicine (K.A.), Tokushima University Graduate School of Biomedical Sciences; National Hospital Organization Utano Hospital (R.K.), Kyoto; and Department of Neurology (S.K.), Graduate School of Medicine, Chiba University, Japan
| | - Ryuji Kaji
- From the Department of Neurology (N.M., M.I., Y.I.), Tokushima University Graduate School of Biomedical Sciences; Department of Animal Model Development (K.T.), Brain Research Institute, Niigata University; Department of Multiple Sclerosis Therapeutics (K.T.), Fukushima Medical University, School of Medicine; Department of Neurology (Y.Y.), Tokushima University Hospital; Department of Public Health (Y.M., Y.N.), Jichi Medical University, Shimotsuke; Department of Neurology (R.S.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (T.I.), Kitasato University School of Medicine, Sagamihara; Department of Public Health and Hygiene (K.N.), Graduate School of Medicine, University of the Ryukyus, Okinawa; Department of Epidemiology for Community Health and Medicine (N.K.), Kyoto Prefectural University of Medicine; Department of Social Health Medicine (N.K.), Shizuoka Graduate University of Public Health; Department of Neurology (M.M.), Kanazawa Medical University, Ishikawa; Department of Preventive Medicine (K.A.), Tokushima University Graduate School of Biomedical Sciences; National Hospital Organization Utano Hospital (R.K.), Kyoto; and Department of Neurology (S.K.), Graduate School of Medicine, Chiba University, Japan
| | - Satoshi Kuwabara
- From the Department of Neurology (N.M., M.I., Y.I.), Tokushima University Graduate School of Biomedical Sciences; Department of Animal Model Development (K.T.), Brain Research Institute, Niigata University; Department of Multiple Sclerosis Therapeutics (K.T.), Fukushima Medical University, School of Medicine; Department of Neurology (Y.Y.), Tokushima University Hospital; Department of Public Health (Y.M., Y.N.), Jichi Medical University, Shimotsuke; Department of Neurology (R.S.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (T.I.), Kitasato University School of Medicine, Sagamihara; Department of Public Health and Hygiene (K.N.), Graduate School of Medicine, University of the Ryukyus, Okinawa; Department of Epidemiology for Community Health and Medicine (N.K.), Kyoto Prefectural University of Medicine; Department of Social Health Medicine (N.K.), Shizuoka Graduate University of Public Health; Department of Neurology (M.M.), Kanazawa Medical University, Ishikawa; Department of Preventive Medicine (K.A.), Tokushima University Graduate School of Biomedical Sciences; National Hospital Organization Utano Hospital (R.K.), Kyoto; and Department of Neurology (S.K.), Graduate School of Medicine, Chiba University, Japan
| | - Yuishin Izumi
- From the Department of Neurology (N.M., M.I., Y.I.), Tokushima University Graduate School of Biomedical Sciences; Department of Animal Model Development (K.T.), Brain Research Institute, Niigata University; Department of Multiple Sclerosis Therapeutics (K.T.), Fukushima Medical University, School of Medicine; Department of Neurology (Y.Y.), Tokushima University Hospital; Department of Public Health (Y.M., Y.N.), Jichi Medical University, Shimotsuke; Department of Neurology (R.S.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (T.I.), Kitasato University School of Medicine, Sagamihara; Department of Public Health and Hygiene (K.N.), Graduate School of Medicine, University of the Ryukyus, Okinawa; Department of Epidemiology for Community Health and Medicine (N.K.), Kyoto Prefectural University of Medicine; Department of Social Health Medicine (N.K.), Shizuoka Graduate University of Public Health; Department of Neurology (M.M.), Kanazawa Medical University, Ishikawa; Department of Preventive Medicine (K.A.), Tokushima University Graduate School of Biomedical Sciences; National Hospital Organization Utano Hospital (R.K.), Kyoto; and Department of Neurology (S.K.), Graduate School of Medicine, Chiba University, Japan
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Peng Y, Yang H, Xue YH, Chen Q, Jin H, Liu S, Yao SY, Du MQ. An update on malignant tumor-related stiff person syndrome spectrum disorders: clinical mechanism, treatment, and outcomes. Front Neurol 2023; 14:1209302. [PMID: 37859648 PMCID: PMC10582361 DOI: 10.3389/fneur.2023.1209302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 09/01/2023] [Indexed: 10/21/2023] Open
Abstract
Stiff person syndrome (SPS) is a rare central nervous system disorder associated with malignancies. In this review, we retrieved information from PubMed, up until August 2023, using various search terms and their combinations, including SPS, stiff person syndrome spectrum disorders (SPSSDs), paraneoplastic, cancer, and malignant tumor. Data from peer-reviewed journals printed in English were organized to explain the possible relationships between different carcinomas and SPSSD subtypes, as well as related autoantigens. From literature searching, it was revealed that breast cancer was the most prevalent carcinoma linked to SPSSDs, followed by lung cancer and lymphoma. Furthermore, classic SPS was the most common SPSSD subtype, followed by stiff limb syndrome and progressive encephalomyelitis with rigidity and myoclonus. GAD65 was the most common autoantigen in patients with cancer and SPSSDs, followed by amphiphysin and GlyR. Patients with cancer subtypes might have multiple SPSSD subtypes, and conversely, patients with SPSSD subtypes might have multiple carcinoma subtypes. The first aim of this review was to highlight the complex nature of the relationships among cancers, autoantigens, and SPSSDs as new information in this field continues to be generated globally. The adoption of an open-minded approach to updating information on new cancer subtypes, autoantigens, and SPSSDs is recommended to renew our database. The second aim of this review was to discuss SPS animal models, which will help us to understand the mechanisms underlying the pathogenesis of SPS. In future, elucidating the relationship among cancers, autoantigens, and SPSSDs is critical for the early prediction of cancer and discovery of new therapeutic modalities.
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Affiliation(s)
- Yong Peng
- Department of Neurology, Affiliated First Hospital of Hunan Traditional Chinese Medical College, Zhuzhou, Hunan, China
- The Third Affiliated Hospital of Hunan University of Chinese Medicine, Zhuzhou, Hunan, China
| | - Huan Yang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Ya-hui Xue
- Department of Neurology, Affiliated First Hospital of Hunan Traditional Chinese Medical College, Zhuzhou, Hunan, China
- The Third Affiliated Hospital of Hunan University of Chinese Medicine, Zhuzhou, Hunan, China
| | - Quan Chen
- Department of Neurology, Affiliated First Hospital of Hunan Traditional Chinese Medical College, Zhuzhou, Hunan, China
- The Third Affiliated Hospital of Hunan University of Chinese Medicine, Zhuzhou, Hunan, China
| | - Hong Jin
- Department of Neurology, Affiliated First Hospital of Hunan Traditional Chinese Medical College, Zhuzhou, Hunan, China
- The Third Affiliated Hospital of Hunan University of Chinese Medicine, Zhuzhou, Hunan, China
| | - Shu Liu
- Department of Neurology, Affiliated First Hospital of Hunan Traditional Chinese Medical College, Zhuzhou, Hunan, China
- The Third Affiliated Hospital of Hunan University of Chinese Medicine, Zhuzhou, Hunan, China
| | - Shun-yu Yao
- Department of Neurology, Affiliated First Hospital of Hunan Traditional Chinese Medical College, Zhuzhou, Hunan, China
- The Third Affiliated Hospital of Hunan University of Chinese Medicine, Zhuzhou, Hunan, China
| | - Miao-qiao Du
- Department of Neurology, Affiliated First Hospital of Hunan Traditional Chinese Medical College, Zhuzhou, Hunan, China
- The Third Affiliated Hospital of Hunan University of Chinese Medicine, Zhuzhou, Hunan, China
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15
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Heneberg P. Diabetes in stiff-person syndrome. Trends Endocrinol Metab 2023; 34:640-651. [PMID: 37586963 DOI: 10.1016/j.tem.2023.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 07/08/2023] [Accepted: 07/24/2023] [Indexed: 08/18/2023]
Abstract
Anti-glutamic acid decarboxylase (GAD) autoantibodies are a hallmark of stiff-person syndrome (SPS) and insulin-dependent diabetes mellitus (IDDM). However, patients with concurrent IDDM and SPS often manifest insulin resistance, and SPS-associated IDDM probably has heterogeneous causes. Some patients manifest IDDM associated only with high titers of anti-GAD65 caused by SPS. By contrast, other patients develop IDDM only after being treated with high-dose corticosteroids or they progress to insulin dependency following their treatment with high-dose corticosteroids. The profile of autoantibodies differs markedly between type 1 diabetes mellitus (T1DM), late-onset diabetes mellitus, and SPS-associated IDDM. Therefore, as with new-onset diabetes after transplantation (NODAT), SPS-associated IDDM should be classified as a specific diabetes entity, the pathophysiology of which requires increased attention.
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Affiliation(s)
- Petr Heneberg
- Charles University, Third Faculty of Medicine, Prague, Czech Republic.
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16
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Musso G, Zoccarato M, Gallo N, Padoan A, Cosma C, Zuliani L, De Gaspari P, Pegoraro E, Plebani M, Basso D. Analytical evaluation of a GAD65 antibodies chemiluminescence immunoassay for CSF in neurological syndromes. Clin Chem Lab Med 2023; 61:1802-1807. [PMID: 37114858 DOI: 10.1515/cclm-2023-0072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 04/17/2023] [Indexed: 04/29/2023]
Abstract
OBJECTIVES Antibodies against glutamic acid decarboxylase isoform 65 (GAD-Ab) have been found in different severe neurological conditions associated with altered synthesis of γ-aminobutyric acid (GABA). Serum GAD-Ab can be found in up to 90 % of patients with type 1 diabetes mellitus (T1DM), mostly at relatively low concentrations, while high concentrations of GAD-ab are thought to be more frequently associate to a neurological condition, with levels 100-folds higher than those found in T1DM. Although CSF testing is recommended when suspecting a GAD-associated neurological syndrome, no commercial immunoassay is validated for this use and no cut-off is internationally recognized to support the diagnosis. METHODS In this study we validated CSF testing of GAD-Ab on an automated chemiluminescence (CLIA) immunoassay that had previously shown good agreement with ELISA on serum. RESULTS We tested 43 CSF from patients with typical GAD-associated neurological disorders and patients with other neurological conditions, identifying a clinical cut-off of 18 kIU/L that discriminated GAD-disease with an area under the curve (AUC) of 0.921. CLIA showed good analytical performances on repeatability and recovery tests in CSF and confirmed an excellent agreement with ELISA. CONCLUSIONS GAD-Ab associated neurological disorders are rare but CSF testing for GAD-Ab is a common request for neurologists when suspecting an insidious autoimmune central nervous system disease. CLIA platforms are expected to be increasingly adopted in clinical laboratories due to their flexibility and reliability, therefore studies on decisional levels should be implemented for improving the interpretation and utilization of laboratory data.
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Affiliation(s)
- Giulia Musso
- Department of Laboratory Medicine, University-Hospital of Padova, Padova, Italy
- Department of Medicine-DIMED, University of Padova, Padova, Italy
| | - Marco Zoccarato
- Neurology Unit, Ospedale Sant'Antonio, University-Hospital of Padova, Padova, Italy
| | - Nicoletta Gallo
- Department of Laboratory Medicine, University-Hospital of Padova, Padova, Italy
| | - Andrea Padoan
- Department of Laboratory Medicine, University-Hospital of Padova, Padova, Italy
- Department of Medicine-DIMED, University of Padova, Padova, Italy
| | - Chiara Cosma
- Department of Laboratory Medicine, University-Hospital of Padova, Padova, Italy
- QI.LAB.MED, Spin-off of the University of Padova, Padova, Italy
| | - Luigi Zuliani
- Department of Neurology, Ospedale San Bortolo, Vicenza, Italy
| | - Piera De Gaspari
- Neuroimmunology Group, Pediatric Research Institute "Città della Speranza", Padova, Italy
| | - Elena Pegoraro
- Department of Neurosciences DNS, University of Padova, Padova, Italy
| | - Mario Plebani
- Department of Laboratory Medicine, University-Hospital of Padova, Padova, Italy
- Department of Medicine-DIMED, University of Padova, Padova, Italy
- QI.LAB.MED, Spin-off of the University of Padova, Padova, Italy
| | - Daniela Basso
- Department of Laboratory Medicine, University-Hospital of Padova, Padova, Italy
- Department of Medicine-DIMED, University of Padova, Padova, Italy
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Thevarkalam M, Kannoth S, Nambiar V, Gopinath S, Mathai A, Anandakuttan A, Krishnan S, Bhaskaran R. Neurological Manifestations of Glutamic Acid Decarboxylase Autoimmunity in Indian Patients. Ann Indian Acad Neurol 2023; 26:663-671. [PMID: 38022450 PMCID: PMC10666894 DOI: 10.4103/aian.aian_392_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 06/05/2023] [Accepted: 06/23/2023] [Indexed: 12/01/2023] Open
Abstract
Objective To study the neurological manifestations of glutamic acid decarboxylase (GAD 65) autoimmunity in Indian patients. Methods Retrospective study conducted in a tertiary care referral hospital in South India. Patients who tested positive for GAD 65 antibodies from February 2013 to July 2019 were included. Results We identified 922 patients who underwent GAD 65 testing, of which 81 tested positive (8.78%) [mean age 55.42 years (SD 17.39, range 9-86 years, median age 57 years)]. Males (n = 47) outnumbered the females (n = 34). All the GAD values measured were <5000 IU/ml. There were 34 cases (42%) of atypical parkinsonism (16/34, 47% fulfilled the diagnostic criteria for autoimmune atypical parkinsonism) in our series forming the most common group with GAD 65 positivity, followed by autoimmune encephalitis (8 cases, 9.88%). Men were more affected with atypical parkinsonism (22/34; 64.70%), stiff person syndrome (2/3; 66.66%), and neuropathy (4/7; 57.1%) while women were more with autoimmune encephalitis (6/8; 75%). Eighteen (22.6%) had underlying autoimmunity (three had type 1 diabetes mellitus). Six (7.4%) had underlying neoplasm. Thirty-three out of 43 patients responded to immunotherapy (76.74%). Five had spontaneous improvement. Conclusion Glutamic acid decarboxylase65 antibody values were much lower in our study population. Male-dominant autoimmunity was seen unlike that in Western literature. The most striking was the high preponderance of atypical parkinsonism in GAD 65-positive patients. We also found that GAD 65 positivity is a useful marker for a positive response to immunotherapy in suspected autoimmune neurological syndromes irrespective of their titers.
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Affiliation(s)
- Meena Thevarkalam
- Department of Biochemistry, Amrita Institute of Medical Sciences, Amrita Viswavidyapeetham University, Kochi, Kerala, India
| | - Sudheeran Kannoth
- Department of Neurology, Amrita Institute of Medical Sciences, Amrita Viswavidyapeetham University, Kochi, Kerala, India
- Department of Neuroimmunology Laboratory, Amrita Institute of Medical Sciences, Amrita Viswavidyapeetham University, Kochi, Kerala, India
| | - Vivek Nambiar
- Department of Neurology, Amrita Institute of Medical Sciences, Amrita Viswavidyapeetham University, Kochi, Kerala, India
| | - Siby Gopinath
- Department of Neurology, Amrita Institute of Medical Sciences, Amrita Viswavidyapeetham University, Kochi, Kerala, India
| | - Annamma Mathai
- Department of Neurology, Amrita Institute of Medical Sciences, Amrita Viswavidyapeetham University, Kochi, Kerala, India
- Department of Neuroimmunology Laboratory, Amrita Institute of Medical Sciences, Amrita Viswavidyapeetham University, Kochi, Kerala, India
| | - Anandkumar Anandakuttan
- Department of Neurology, Amrita Institute of Medical Sciences, Amrita Viswavidyapeetham University, Kochi, Kerala, India
| | - Sajitha Krishnan
- Department of Biochemistry, Amrita Institute of Medical Sciences, Amrita Viswavidyapeetham University, Kochi, Kerala, India
| | - Renjitha Bhaskaran
- Department of Biostatistics, Amrita Institute of Medical Sciences, Amrita Viswavidyapeetham University, Kochi, Kerala, India
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Budhram A, Freeman E, Bhayana V, Yang L. Positive Predictive Value of Anti-GAD65 ELISA Cut-Offs for Neurological Autoimmunity. Can J Neurol Sci 2023; 50:766-768. [PMID: 35861111 DOI: 10.1017/cjn.2022.276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
High anti-GAD65 levels associate with core manifestations of GAD65 neurological autoimmunity. ELISA cut-offs for high anti-GAD65 levels (>10,000 IU/ml in serum, >100 IU/ml in CSF) have been proposed that merit further evaluation. We reviewed patients who underwent anti-GAD65 ELISA for suspected autoimmune encephalitis and found values above these cut-offs to have a positive predictive value (PPV) for neurological autoimmunity of 88%. Anti-GAD65 values above proposed ELISA cut-offs have a reasonably high PPV for neurological autoimmunity in patients with suspected autoimmune encephalitis. Consideration of alternative diagnoses and corroboration with CSF can help flag potentially clinically irrelevant results and avoid patient misdiagnosis.
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Affiliation(s)
- Adrian Budhram
- Department of Clinical Neurological Sciences, London Health Sciences Centre, Western University, London, Ontario, Canada
- Department of Pathology and Laboratory Medicine, London Health Sciences Centre, Western University, London, Ontario, Canada
| | - Erin Freeman
- Department of Pathology and Laboratory Medicine, London Health Sciences Centre, Western University, London, Ontario, Canada
| | - Vipin Bhayana
- Department of Pathology and Laboratory Medicine, London Health Sciences Centre, Western University, London, Ontario, Canada
| | - Liju Yang
- Department of Pathology and Laboratory Medicine, London Health Sciences Centre, Western University, London, Ontario, Canada
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19
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Zong S, Vinke AM, Du P, Hoffmann C, Mané-Damas M, Molenaar PC, Damoiseaux JGMC, Losen M, Rouhl RPW, Martinez-Martinez P. Anti-GAD65 autoantibody levels measured by ELISA and alternative types of immunoassays in relation to neuropsychiatric diseases versus diabetes mellitus type 1. Front Neurol 2023; 14:1111063. [PMID: 37305746 PMCID: PMC10248002 DOI: 10.3389/fneur.2023.1111063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 05/10/2023] [Indexed: 06/13/2023] Open
Abstract
Background Anti-GAD65 autoantibodies (GAD65-Abs) may occur in patients with epilepsy and other neurological disorders, but the clinical significance is not clear-cut. Whereas high levels of GAD65-Abs are considered pathogenic in neuropsychiatric disorders, low or moderate levels are only considered as mere bystanders in, e.g., diabetes mellitus type 1 (DM1). The value of cell-based assays (CBA) and immunohistochemistry (IHC) for GAD65-Abs detection has not been clearly evaluated in this context. Objective To re-evaluate the assumption that high levels of GAD65-Abs are related to neuropsychiatric disorders and lower levels only to DM1 and to compare ELISA results with CBA and IHC to determine the additional value of these tests. Methods 111 sera previously assessed for GAD65-Abs by ELISA in routine clinical practice were studied. Clinical indications for testing were, e.g., suspected autoimmune encephalitis or epilepsy (neuropsychiatric cohort; n = 71, 7 cases were initially tested positive for GAD65-Abs by ELISA), and DM1 or latent autoimmune diabetes in adults (DM1/LADA cohort (n = 40, all were initially tested positive)). Sera were re-tested for GAD65-Abs by ELISA, CBA, and IHC. Also, we examined the possible presence of GAD67-Abs by CBA and of other neuronal autoantibodies by IHC. Samples that showed IHC patterns different from GAD65 were further tested by selected CBAs. Results ELISA retested GAD65-Abs level in patients with neuropsychiatric diseases was higher than in patients with DM1/LADA (only retested positive samples were compared; 6 vs. 38; median 47,092 U/mL vs. 581 U/mL; p = 0.02). GAD-Abs showed positive both by CBA and IHC only if antibody levels were above 10,000 U/mL, without a difference in prevalence between the studied cohorts. We found other neuronal antibodies in one patient with epilepsy (mGluR1-Abs, GAD-Abs negative), and in a patient with encephalitis, and two patients with LADA. Conclusion GAD65-Abs levels are significantly higher in patients with neuropsychiatric disease than in patients with DM1/LADA, however, positivity in CBA and IHC only correlates with high levels of GAD65-Abs, and not with the underlying diseases.
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Affiliation(s)
- Shenghua Zong
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, Netherlands
| | - Anita M. Vinke
- Department of Neurology, Maastricht University Medical Center (MUMC +), Maastricht, Netherlands
| | - Peng Du
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, Netherlands
| | - Carolin Hoffmann
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, Netherlands
- Algarve Biomedical Center, Algarve Biomedical Center Research Institute, Faro, Portugal
| | - Marina Mané-Damas
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, Netherlands
| | - Peter C. Molenaar
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, Netherlands
| | | | - Mario Losen
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, Netherlands
| | - Rob P. W. Rouhl
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, Netherlands
- Department of Neurology, Maastricht University Medical Center (MUMC +), Maastricht, Netherlands
- Academic Centre for Epileptology Kempenhaeghe/MUMC+, Maastricht, Netherlands
| | - Pilar Martinez-Martinez
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, Netherlands
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20
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Lin N, Bai L, Liu Q, Chen J, Ren H, Guan H, Lu Q. Seizure semiology and predictors of outcomes in Chinese patients with glutamic acid decarboxylase antibody-associated neurological syndrome. BMC Neurol 2023; 23:149. [PMID: 37041500 PMCID: PMC10088211 DOI: 10.1186/s12883-023-03182-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 03/24/2023] [Indexed: 04/13/2023] Open
Abstract
BACKGROUND In the current study, seizure semiology and potential predictive factors of seizure outcomes in glutamic acid decarboxylase antibody (GAD Ab)-associated neurological syndrome were investigated. METHODS In this study, 32 Chinese patients with GAD Ab-associated neurological syndrome who presented with seizures at Peking Union Medical College Hospital from January 2017 to October 2022 were reviewed; 30 had a follow-up duration of more than 1 year. RESULTS Among the 32 patients, 10 presented with epilepsy alone. Concomitant neurological syndromes were observed in 22 patients, including limbic encephalitis (n = 20), stiff-person syndrome (SPS, n = 1), and cerebellar ataxia (n = 1). Bilateral tonic-clonic seizures were observed in 21 patients (65.6%). Focal seizures occurred in 27 patients (84.4%); 17 had focal motor seizures and 18 focal non-motor seizures. Among 30 patients with long-term follow-up, 11 (36.7%) were seizure-free. Acute/subacute onset (p = 0.049) and comorbidity of limbic encephalitis with epilepsy (p = 0.023) led to better seizure outcomes. Patients with persistent epilepsy were more likely to have focal seizure (p = 0.003) and higher frequency of seizure (p = 0.001). Furthermore, these patients tended to have longer intervals from onset to immunomodulatory treatments. Early immunotherapy (within 6 months from onset) was administered in 81.8% of seizure-free patients but only in 42.1% of patients with persistent seizures. However, steroid and immunosuppressant duration did not differ in the two groups. Repeated serum GAD Ab tests during the follow-up showed no association with seizure outcomes. CONCLUSIONS The seizure manifestations are diverse and variable. Approximately one third of patients achieved seizure remission during long-term follow-up. The type and frequency of seizures may influence the seizure outcomes. Early immunotherapy, especially within 6 months, may lead to better seizure outcomes.
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Affiliation(s)
- Nan Lin
- Department of Neurology, Peking Union Medical College Hospital, NO.1 Shuaifuyuan Hutong of Dongcheng District, Beijing, 100730, China
| | - Lin Bai
- Department of Neurology, Peking Union Medical College Hospital, NO.1 Shuaifuyuan Hutong of Dongcheng District, Beijing, 100730, China
| | - Qing Liu
- Department of Neurology, Peking Union Medical College Hospital, NO.1 Shuaifuyuan Hutong of Dongcheng District, Beijing, 100730, China
| | - Jianhua Chen
- Department of Neurology, Peking Union Medical College Hospital, NO.1 Shuaifuyuan Hutong of Dongcheng District, Beijing, 100730, China
| | - Haitao Ren
- Department of Neurology, Peking Union Medical College Hospital, NO.1 Shuaifuyuan Hutong of Dongcheng District, Beijing, 100730, China
| | - Hongzhi Guan
- Department of Neurology, Peking Union Medical College Hospital, NO.1 Shuaifuyuan Hutong of Dongcheng District, Beijing, 100730, China
| | - Qiang Lu
- Department of Neurology, Peking Union Medical College Hospital, NO.1 Shuaifuyuan Hutong of Dongcheng District, Beijing, 100730, China.
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21
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Warren N, Freier K, Siskind D, O'Gorman C, Blum S, Gillis D, Scott JG. Anti-glutamic acid decarboxylase antibody screening in first-episode psychosis. Aust N Z J Psychiatry 2023; 57:603-612. [PMID: 35362325 DOI: 10.1177/00048674221089560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVE The Royal Australian and New Zealand College of Psychiatrists recommends screening for a range of antibodies in first-episode psychosis, including anti-glutamic acid decarboxylase antibodies. Glutamic acid decarboxylase antibody-associated encephalitis occurs with high antibody titres and may cause cognitive dysfunction, seizures and psychiatric symptoms. However, glutamic acid decarboxylase antibodies are more frequently found in lower titre in association with other autoimmune disorders (such as diabetes mellitus type 1) and in healthy individuals. The utility of testing unselected populations of consumers with psychosis is unclear. The psychiatric manifestations of this disorder are also poorly described. METHODS First, systematic review of cohort and case-control studies that tested for IgG glutamic acid decarboxylase antibodies in psychiatric populations was conducted. Random-effects meta-analysis of odds ratio for antibody positivity in cases with psychosis and controls assessed prevalence. Second, literature review of all published cases and case series of glutamic acid decarboxylase antibody-associated limbic encephalitis was assessed for frequency and description of psychotic symptoms. RESULTS There were 17 studies, in which 2754 individuals with psychotic disorders were tested for glutamic acid decarboxylase IgG antibodies. Thirty-one consumers with psychosis (0.7%) had positive glutamic acid decarboxylase antibodies compared to 24 controls (1.0%), all at low titre and not fulfilling diagnostic criteria for autoimmune encephalitis. Meta-analysis found no significant difference in rates of glutamic acid decarboxylase antibody positivity (odds ratio = 1.8, 95% confidence interval: [0.90, 3.63]). Literature review found 321 cases of glutamic acid decarboxylase antibody-associated limbic encephalitis, with psychosis in 15 (4.3%) cases. Clinical screening would have identified all cases that presented to psychiatric services. CONCLUSION Glutamic acid decarboxylase antibodies were uncommon in consumers with psychosis, with no significant difference in prevalence from controls and no cases of encephalitis identified. In cases with established glutamic acid decarboxylase antibody-associated limbic encephalitis, psychotic symptoms were uncommon and identifiable by clinical assessment. Targeted antibody testing guidelines should be further considered.
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Affiliation(s)
- Nicola Warren
- School of Medicine, The University of Queensland, Brisbane, QLD, Australia
- Metro South Addiction and Mental Health Service, Brisbane, QLD, Australia
| | - Karen Freier
- Metro South Addiction and Mental Health Service, Brisbane, QLD, Australia
| | - Dan Siskind
- School of Medicine, The University of Queensland, Brisbane, QLD, Australia
- Metro South Addiction and Mental Health Service, Brisbane, QLD, Australia
| | - Cullen O'Gorman
- School of Medicine, The University of Queensland, Brisbane, QLD, Australia
- Department of Neurology, The Princess Alexandra Hospital, Brisbane, QLD, Australia
- Mater Centre for Clinical Neurosciences, Mater Hospital, Brisbane, QLD, Australia
| | - Stefan Blum
- School of Medicine, The University of Queensland, Brisbane, QLD, Australia
- Department of Neurology, The Princess Alexandra Hospital, Brisbane, QLD, Australia
- Mater Centre for Clinical Neurosciences, Mater Hospital, Brisbane, QLD, Australia
| | - David Gillis
- Pathology Queensland Central Laboratory, Division of Immunology, Royal Brisbane and Women's Hospital, Brisbane, QLD, Australia
| | - James G Scott
- QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
- Metro North Mental Health Service, Brisbane, QLD, Australia
- Queensland Centre for Mental Health Research, Brisbane, QLD, Australia
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Lubarski K, Mania A, Michalak S, Osztynowicz K, Mazur-Melewska K, Figlerowicz M. The Coexistence of Antibodies to Neuronal Cell and Synaptic Receptor Proteins, Gangliosides and Selected Neurotropic Pathogens in Neurologic Disorders in Children. Diagnostics (Basel) 2023; 13:diagnostics13071274. [PMID: 37046492 PMCID: PMC10093427 DOI: 10.3390/diagnostics13071274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 03/25/2023] [Accepted: 03/27/2023] [Indexed: 03/30/2023] Open
Abstract
Various primarily non-autoimmune neurological disorders occur synchronously with autoantibodies against tissues in the nervous system. We aimed to assess serum and cerebrospinal fluid (CSF) autoantibodies in children with neurologic disorders. To find new diagnostic tools, we compared the laboratory and clinical findings between the distinguished groups. Retrospectively, 508 patients were divided into six subgroups: neuroinfections, pediatric autoimmune neuropsychiatric disorders associated with streptococcal infections, neurologic autoimmune and demyelinating diseases, epilepsy, pervasive developmental disorders and other patients. We analysed serum anti-aquaporin-4, antiganglioside, neuronal antinuclear and cytoplasmic antibodies, as well as antibodies against surface neuronal and synaptic antigens in the CSF and serum. We involved available demographic and clinical data. Autoantibodies appeared in 165 (32.3%) children, with 24 showing multiple types of them. The most common were anti-neuroendothelium (anti-NET), anti-N-Methyl-D-Aspartate receptor (anti-NMDAr), anti-glial fibrillary acidic protein and anti-myelin antibodies bothering 46/463 (9.9%), 32/343 (9.4%), 27/463 (5.8%) and 27/463 (5.8%), respectively. Anti-NET and anti-NMDAr antibodies appeared more frequently in children with autoimmunity (p = 0.017; p < 0.001, respectively), increasing the autoimmune disease risk (OR = 2.18, 95% CI 1.13–13.97; OR = 3.91, 95% CI 1.86–8.22, respectively). Similar pathomechanisms appeared in diseases of different aetiology with clinical spectrums mimicking each other, so we proposed the model helping to diagnose autoimmune disease. We proved the influence of age, living place and medical history on the final diagnosis.
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Affiliation(s)
- Karol Lubarski
- Department of Infectious Diseases and Child Neurology, Poznan University of Medical Sciences, 27/33 Szpitalna St., 60-572 Poznan, Poland
| | - Anna Mania
- Department of Infectious Diseases and Child Neurology, Poznan University of Medical Sciences, 27/33 Szpitalna St., 60-572 Poznan, Poland
| | - Sławomir Michalak
- Department of Neurology, Division of Neurochemistry and Neuropathology, Poznan University of Medical Sciences, 49 Przybyszewskiego St., 60-355 Poznan, Poland
| | - Krystyna Osztynowicz
- Department of Neurology, Division of Neurochemistry and Neuropathology, Poznan University of Medical Sciences, 49 Przybyszewskiego St., 60-355 Poznan, Poland
| | - Katarzyna Mazur-Melewska
- Department of Infectious Diseases and Child Neurology, Poznan University of Medical Sciences, 27/33 Szpitalna St., 60-572 Poznan, Poland
| | - Magdalena Figlerowicz
- Department of Infectious Diseases and Child Neurology, Poznan University of Medical Sciences, 27/33 Szpitalna St., 60-572 Poznan, Poland
- Correspondence:
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Cecchin A, Reynolds C, Ali S, Hissaria P. Evaluation of glutamic acid decarboxylase (GAD) 65 antibody detection methods for neurological and diabetic investigation in an Australian diagnostic laboratory. Pathology 2023; 55:538-542. [PMID: 37037719 DOI: 10.1016/j.pathol.2023.01.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 12/23/2022] [Accepted: 01/14/2023] [Indexed: 04/12/2023]
Abstract
The role of anti-glutamic acid decarboxylase (GAD) 65 autoantibodies in autoimmune neurological conditions is evolving, but testing recommendations remain unchanged in Australia with GAD enzyme-linked immunosorbent assay (ELISA) and immunoblot as the only two Therapeutic Goods Administration approved testing methods available in Australia. Common practice is for use of ELISA in diagnosis of type 1 diabetes mellitus (T1DM) and use of immunoblot for diagnosis of GAD65-associated neurological disease. We observed a cohort of patients with negative immunoblot results and positive ELISA in the context of GAD-associated neurological disease without T1DM. In the absence of robust consensus guidelines on preferred testing modalities, we sought to determine if ELISA could have a superior role in the diagnosis of GAD-associated neurological disease when compared to immunoblot in this paper. We tested for anti-GAD65 autoantibodies on 55 patient samples, 40 samples requested for neurological disease and 15 type 1 diabetes samples with detectable anti-GAD65, using two testing platforms: Euroimmun anti-GAD enzyme-linked immunosorbent assay (ELISA) and. Euroimmun EuroLine immunoblot for paraneoplastic neurologic syndromes. These results were correlated against the clinical scenario. Positive ELISA results had a sensitivity of 100% and specificity of 91% for GAD65-related neurological disease. Immunoblot showed sensitivity of 43% and specificity of 76% for GAD65-related neurological disease. ELISA proved more sensitive and specific for GAD65-related neurological disease compared to immunoblot, raising questions about the role of this testing modality in neurological disease. We propose that ELISA should be used as a sole diagnostic method for all GAD65 antibody-related neurological disease over immunoblot. The presence of anti-GAD65 antibody on immunoblot is of doubtful clinical significance.
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Affiliation(s)
| | - Claire Reynolds
- SA Pathology, Adelaide, SA, Australia; Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Syed Ali
- SA Pathology, Adelaide, SA, Australia; Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Pravin Hissaria
- SA Pathology, Adelaide, SA, Australia; Royal Adelaide Hospital, Adelaide, SA, Australia; University of Adelaide, Adelaide, SA, Australia.
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Kuang Z, Baizabal-Carvallo JF, Mofatteh M, Xie S, Pan M, Ye J, Zhou L, Yang S, Wang Z, Chen Y, Li Y. Meningoencephalitis associated with GAD65 autoimmunity. Front Immunol 2023; 14:1120894. [PMID: 36969186 PMCID: PMC10035530 DOI: 10.3389/fimmu.2023.1120894] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Accepted: 02/20/2023] [Indexed: 03/11/2023] Open
Abstract
BackgroundEncephalitis has been recognized in patients with autoimmunity related to the 65-kDa isoform of glutamic acid decarboxylase (GAD65) antibodies; however, patients with meningoencephalitis associated with those antibodies have been rarely identified in the medical literature. We aimed to define the frequency, clinical features, response to therapy, and functional outcomes of patients with meningoencephalitis associated with GAD antibodies.MethodsWe retrospectively studied consecutive patients attending a tertiary care center for evaluation of an autoimmune neurological disorder from January 2018 to June 2022. The modified Rankin Scale (mRS) was used to assess the functional outcome at the last follow-up.ResultsWe evaluated 482 patients with confirmed autoimmune encephalitis during the study period. Four among the 25 patients with encephalitis related to GAD65 antibodies were identified. One patient was excluded owing to the coexistence of NMDAR antibodies. Three male patients aged 36, 24, and 16 years had an acute (n = 1) or subacute (n = 2) onset of confusion, psychosis, cognitive symptoms, seizures, or tremor. No patient had fever or clinical signs of meningeal irritation. Mild pleocytosis (<100 leukocytes/106) was identified in two patients, whereas one patient had normal CSF. Following immunotherapy with corticosteroids (n = 3) or intravenous immunoglobulin (n = 1), significant improvement was observed in all three cases, achieving a good outcome (mRS 1) in all cases.ConclusionMeningoencephalitis is an uncommon presentation of GAD65 autoimmunity. Patients present with signs of encephalitis but with meningeal enhancement and have good outcomes.
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Affiliation(s)
- Zuying Kuang
- Department of Neurology, GuangDong 999 Brain Hospital, Guangzhou, China
| | - José Fidel Baizabal-Carvallo
- Parkinson’s Disease Center and Movement Disorders Clinic, Department of Neurology, Baylor College of Medicine, Houston, TX, United States
- Department of Sciences and Engineering, University of Guanajuato, León, Mexico
| | - Mohammad Mofatteh
- School of Medicine, Dentistry and Biomedical Sciences, Queen’s University Belfast, Belfast, United Kingdom
| | - Sifen Xie
- Department of Neurology, GuangDong 999 Brain Hospital, Guangzhou, China
| | - Mengqiu Pan
- Department of Neurology, GuangDong 999 Brain Hospital, Guangzhou, China
| | - Jinlong Ye
- Department of Neurology, GuangDong 999 Brain Hospital, Guangzhou, China
| | - Lihua Zhou
- Department of Neurology, GuangDong 999 Brain Hospital, Guangzhou, China
| | - Shuiquang Yang
- Department of Neurology, Foshan Sanshui District People’s Hospital, Foshan, Guangdong, China
| | - Zhanhang Wang
- Department of Neurology, GuangDong 999 Brain Hospital, Guangzhou, China
- *Correspondence: Yimin Chen, ; Zhanhang Wang, ; Yaqin Li,
| | - Yimin Chen
- Department of Neurology, Foshan Sanshui District People’s Hospital, Foshan, Guangdong, China
- *Correspondence: Yimin Chen, ; Zhanhang Wang, ; Yaqin Li,
| | - Yaqin Li
- Department of Neurology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
- *Correspondence: Yimin Chen, ; Zhanhang Wang, ; Yaqin Li,
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Paraneoplastic neurological syndromes of the central nervous system: a single institution 7-year case series. Acta Neurol Belg 2023:10.1007/s13760-023-02232-y. [PMID: 36884202 PMCID: PMC9994403 DOI: 10.1007/s13760-023-02232-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 03/02/2023] [Indexed: 03/09/2023]
Abstract
BACKGROUND Paraneoplastic neurological syndromes (PNSs) are nonmetastatic complications of malignancy, defined by the presence of onconeural antibodies (ONAs). ONAs may be found in 60% of patients with central nervous system (CNS) involvement, and they are directed against intraneuronal antigens or channels, receptors or associated proteins located at the synaptic or extra-synaptic neuronal cell membrane. Given its rare incidence, there are few epidemiological case series on CNS-PNS. We aim to discuss the variability of CNS-PNSs etiology, clinical features, management and outcome, highlighting the importance of early recognition and appropriate treatment, leading to significant reduction of mortality and morbidity. METHODS We retrospectively reviewed our 7-years single-center experience, and specifically discussed the underlying etiology, parenchymal CNS involvement, and the acute treatment response. Only cases fulfilling PNS Euronetwork criteria for definitive PNS were included. RESULTS A total of 26 probable PNSs cases involving CNS were identified. We reported medical records of eleven (42.3%) illustrative cases, meeting the criteria of definite PNS and presenting variable clinical spectrum and different radiological appearances. Our series has a relative paucity of the most common syndromes and larger portion of clinical diagnosis with ONAs. Well-characterized ONAs had been detected in CSF of six patients. CONCLUSIONS Our case series supports the utmost importance of early recognition of CNS-PNSs. Screening for occult malignancies should not be limited to patients with classical CNS syndrome. Empiric immunomodulatory therapy may be considered before the diagnostic evaluation is completed, in order to prevent unfavorable outcome. Late presentations should not discourage initiation of treatment.
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26
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Almudhi A, Gabr SA. Associations between glutamic acid decarboxylase antibodies, oxidative stress markers, and cognitive capacity in adolescents who stutter. Saudi J Biol Sci 2023; 30:103580. [PMID: 36844638 PMCID: PMC9943924 DOI: 10.1016/j.sjbs.2023.103580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 01/04/2023] [Accepted: 01/29/2023] [Indexed: 02/04/2023] Open
Abstract
In this study, we amid to evaluate the correlation between the change in the expressed levels of anti-GAD antibodies titers, oxidative stress markers, cytokines markers, and cognitive capacity in adolescents with mild stuttering. Eighty participants (60 male/20 female) with the age range of 10-18 years with moderate stutteringparticipated in this study. To assess the stuttering and cognitive function, stutteringseverity instrument (SSI-4; 4th edit.)and the LOTCA-7 scores assessment were applied respectively in all subjects. In addition, serum GAD antibodies, cytokines like TNF-α, CRP,and IL-6 withtotal antioxidant capacity and nitric oxide as oxidative stress markers were estimated using calorimetry and immunoassay techniques.The results showed that good cognitive capacity was reported in about 56.25 % of the study population (n = 45) with a 117.52 ± 6.3 mean LOTCA-7 score. However, abnormal cognitive function was identified in 43.75 % of the study population (n = 35); they were categorized into moderate (score 62-92, n = 35), and poor (score 31-62; n = 10). There were significant associations between cognitive capacity reported and all biomarkers. The expression of GAD antibodies is significantly associated with the degree of cognitive capacity among students with stuttering. Significant association with the reduction (P = 0.01) in LOTCA-7 score domains, particularly orientation, thinking operations, attention, and concentration among students with variable cognitive capacity compared to controls. In addition, the expressed higher GAD antibodies in students with moderate and poor cognitive capacity showed to be significantly correlated with both elevated concentrations of cytokines; TNF-α, CRP, and IL-6, and the reduction of TAC and nitric oxide (NO) respectively. This study concludes that abnormality of cognitive capacity showed to be associated with higher expression of GAD antibodies, cytokines, and oxidative stress in school students with moderate stuttering.
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Affiliation(s)
- Abdulaziz Almudhi
- Department of Medical Rehabilitation Sciences, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia,Speech Language Pathology Unit, King Khalid University, Abha 61481, Saudi Arabia,Corresponding author at: Department of Medical Rehabilitation Sciences, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia.
| | - Sami A. Gabr
- Department of Anatomy and Embryology, Faculty of Medicine, Mansoura University, Mansoura 35511, Egypt
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27
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Lin CYR, Kuo SH. Ataxias: Hereditary, Acquired, and Reversible Etiologies. Semin Neurol 2023; 43:48-64. [PMID: 36828010 DOI: 10.1055/s-0043-1763511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Abstract
A variety of etiologies can cause cerebellar dysfunction, leading to ataxia symptoms. Therefore, the accurate diagnosis of the cause for cerebellar ataxia can be challenging. A step-wise investigation will reveal underlying causes, including nutritional, toxin, immune-mediated, genetic, and degenerative disorders. Recent advances in genetics have identified new genes for both autosomal dominant and autosomal recessive ataxias, and new therapies are on the horizon for targeting specific biological pathways. New diagnostic criteria for degenerative ataxias have been proposed, specifically for multiple system atrophy, which will have a broad impact on the future clinical research in ataxia. In this article, we aim to provide a review focus on symptoms, laboratory testing, neuroimaging, and genetic testing for the diagnosis of cerebellar ataxia causes, with a special emphasis on recent advances. Strategies for the management of cerebellar ataxia is also discussed.
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Affiliation(s)
- Chi-Ying R Lin
- Department of Neurology, Parkinson's Disease Center and Movement Disorders Clinic, Baylor College of Medicine, Houston, Texas.,Department of Neurology, Alzheimer's Disease and Memory Disorders Center, Baylor College of Medicine, Houston, Texas
| | - Sheng-Han Kuo
- Department of Neurology, College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, New York.,Initiative for Columbia Ataxia and Tremor, Columbia University Irving Medical Center, New York, New York
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28
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Madlener M, Strippel C, Thaler FS, Doppler K, Wandinger KP, Lewerenz J, Ringelstein M, Roessling R, Menge T, Wickel J, Kellingshaus C, Mues S, Kraft A, Linsa A, Tauber SC, Berg FT, Gerner ST, Paliantonis A, Finke A, Priller J, Schirotzek I, Süße M, Sühs KW, Urbanek C, Senel M, Sommer C, Kuempfel T, Pruess H, Fink GR, Leypoldt F, Melzer N, Malter MP. Glutamic acid decarboxylase antibody-associated neurological syndromes: Clinical and antibody characteristics and therapy response. J Neurol Sci 2023; 445:120540. [PMID: 36608627 DOI: 10.1016/j.jns.2022.120540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 11/26/2022] [Accepted: 12/26/2022] [Indexed: 12/30/2022]
Abstract
BACKGROUND Antibodies against glutamic acid decarboxylase (GAD-abs) at high serum levels are associated with diverse autoimmune neurological syndromes (AINS), including cerebellar ataxia, epilepsy, limbic encephalitis and stiff-person syndrome. The impact of low serum GAD-ab levels in patients with suspected AINS remains controversial. Specific intrathecal GAD-ab synthesis may serve as a marker for GAD-ab-associated nervous system autoimmunity. We present characteristics of a multicentric patient cohort with suspected AINS associated with GAD antibodies (SAINS-GAD+) and explore the relevance of serum GAD-ab levels and intrathecal GAD-ab synthesis. METHODS All patients with SAINS-GAD+ included in the registry of the German Network for Research on Autoimmune Encephalitis (GENERATE) from 2011 to 2019 were analyzed. High serum GAD-ab levels were defined as RIA>2000 U/mL, ELISA>1000 U/mL, or as a positive staining pattern on cell-based assays. RESULTS One-hundred-one patients were analyzed. In descending order they presented with epilepsy/limbic encephalitis (39%), cerebellar ataxia (28%), stiff person syndrome (22%), and overlap syndrome (12%). Immunotherapy was administered in 89% of cases with improvements in 46%. 35% of SAINS-GAD+ patients had low GAD-ab serum levels. Notably, unmatched oligoclonal bands in CSF but not in serum were more frequent in patients with low GAD-ab serum levels. GAD-ab-levels (high/low) and intrathecal GAD-ab synthesis (present or not) did not impact clinical characteristics and outcome. CONCLUSIONS Overall, immunotherapy in SAINS-GAD+ was moderately effective. Serum GAD-ab levels and the absence or presence of intrathecal GAD-ab synthesis did not predict clinical characteristics or outcomes in SAINS-GAD+. The detection of unmatched oligoclonal bands might outweigh low GAD-ab serum levels.
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Affiliation(s)
- Marie Madlener
- Department of Neurology, University of Cologne, Faculty of Medicine and University Hospital Cologne, Kerpener Str. 62, Cologne 50937, Germany.
| | - Christine Strippel
- Department of Neurology with Institute of Translational Neurology, University Hospital Muenster, Albert-Schweitzer-Campus 1, Muenster 48149, Germany
| | - Franziska S Thaler
- Institute of Clinical Neuroimmunology, University Hospital and Biomedical Center, Ludwig-Maximilians University Munich, Marchioninistrasse 15, Munich 81377, Germany
| | - Kathrin Doppler
- Department of Neurology, University of Wuerzburg, Josef-Schneider-Straße 2, Würzburg 97080, Germany
| | - Klaus P Wandinger
- Institute of Clinical Chemistry, University Hospital Schleswig-Holstein, Campus Luebeck, Ratzeburger Allee 160, Luebeck 23538, Germany
| | - Jan Lewerenz
- Department of Neurology, Ulm University, Albert-Einstein-Allee 23, Ulm 89081, Germany
| | - Marius Ringelstein
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Duesseldorf, Moorenstraße 5, Duesseldorf 40225, Germany; Department of Neurology, Center for Neurology and Neuropsychiatry, LVR-Klinikum, Heinrich-Heine-University Duesseldorf, Bergische Landstraße 2, Duesseldorf 40629, Germany
| | - Rosa Roessling
- Department of Neurology and Experimental Neurology, Charité-Universitaetsmedizin Berlin, German Center for Neurodegenerative Diseases (DZNE) Berlin, Charitéplatz 1, Berlin 10117, Germany
| | - Til Menge
- Department of Neurology, Center for Neurology and Neuropsychiatry, LVR-Klinikum, Heinrich-Heine-University Duesseldorf, Bergische Landstraße 2, Duesseldorf 40629, Germany
| | - Jonathan Wickel
- Section Translational Neuroimmunology, Department of Neurology, University Hospital Jena, Am Klinikum1, Jena 07747, Germany
| | - Christoph Kellingshaus
- Department of Neurology, Klinikum Osnabrueck, Am Finkenhügel 1, Osnabrueck 49076, Germany
| | - Sigrid Mues
- Department of Neurology, University Hospital, Technische Universitaet Dresden, Fetscherstraße 74, Dresden 01307, Germany
| | - Andrea Kraft
- Department of Neurology, Martha-Maria Hospital Halle, Röntgenstraße 1, Halle (Saale) 06120, Germany
| | - Andreas Linsa
- Department of Neurology, Carl-Thiem Klinikum Cottbus, Thiemstraße 111, Cottbus 03048, Germany
| | - Simone C Tauber
- Department of Neurology, RWTH Aachen University, Templergraben 55, Aachen 52062, Germany
| | - Florian Then Berg
- Department of Neurology, University of Leipzig, Liebigstraße 20, Leipzig 04103, Germany
| | - Stefan T Gerner
- Department of Neurology, University Hospital Erlangen, Maximiliansplatz 2, Erlangen 91054, Germany
| | - Asterios Paliantonis
- Department of Neurology, Alfried Krupp Krankenhaus Essen, Alfried-Krupp-Straße 21, Essen 45131, Germany
| | - Alexander Finke
- Department of Neurology, Hospital Lueneburg, Bögelstraße 1, Lueneburg 21339, Germany
| | - Josef Priller
- Department of Neuropsychiatry and Laboratory of Molecular Psychiatry, Charité-Universitaetsmedizin Berlin, Charitéplatz 1, Berlin 10117, Germany
| | - Ingo Schirotzek
- Department of Neurology, University Hospital Giessen and Marburg, Rudolf-Buchheim-Straße 8, Giessen 35392, Germany; Department of Neurology and Neurointensive Care, Klinikum Darmstadt, Grafenstraße 9, Darmstadt 64283, Germany
| | - Marie Süße
- Department of Neurology, University Medicine Greifswald, Fleischmannstraße 8, Greifswald 17475, Germany
| | - Kurt W Sühs
- Department of Neurology, University Hospital Hannover, Carl-Neuberg-Straße 1, Hannover 30625, Germany
| | - Christian Urbanek
- Department of Neurology, Hospital Ludwigshafen, Bremserstraße 79, Ludwigshafen am Rhein 67063, Germany
| | - Makbule Senel
- Department of Neurology, Ulm University, Albert-Einstein-Allee 23, Ulm 89081, Germany
| | - Claudia Sommer
- Department of Neurology, University of Wuerzburg, Josef-Schneider-Straße 2, Würzburg 97080, Germany
| | - Tania Kuempfel
- Institute of Clinical Neuroimmunology, University Hospital and Biomedical Center, Ludwig-Maximilians University Munich, Marchioninistrasse 15, Munich 81377, Germany
| | - Harald Pruess
- Department of Neurology and Experimental Neurology, Charité-Universitaetsmedizin Berlin, German Center for Neurodegenerative Diseases (DZNE) Berlin, Charitéplatz 1, Berlin 10117, Germany
| | - Gereon R Fink
- Department of Neurology, University of Cologne, Faculty of Medicine and University Hospital Cologne, Kerpener Str. 62, Cologne 50937, Germany; Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Center Juelich, Wilhelm-Johnen-Straße, Juelich 52428, Germany
| | - Frank Leypoldt
- Institute of Clinical Chemistry and Department of Neurology, University Kiel and University Hospital Schleswig-Holstein, Arnold-Heller-Straße 3, Kiel 24105, Germany
| | - Nico Melzer
- Department of Neurology with Institute of Translational Neurology, University Hospital Muenster, Albert-Schweitzer-Campus 1, Muenster 48149, Germany; Department of Neurology, Medical Faculty, Heinrich-Heine-University Duesseldorf, Moorenstraße 5, Duesseldorf 40225, Germany
| | - Michael P Malter
- Department of Neurology, University of Cologne, Faculty of Medicine and University Hospital Cologne, Kerpener Str. 62, Cologne 50937, Germany
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29
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Hou JY, Liu HU, Kuo CY, Liu YH, Lin JJ, Hsieh MY, Hung PC, Cheng YT, Su IC, Wang HS, Chou IJ, Lin KL. The clinical relevance of anti-glutamic acid decarboxylase antibodies in children with encephalitis/encephalopathy. Front Neurosci 2023; 16:1081580. [PMID: 36817097 PMCID: PMC9932768 DOI: 10.3389/fnins.2022.1081580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 12/31/2022] [Indexed: 02/05/2023] Open
Abstract
Anti-glutamic acid decarboxylase (anti-GAD) antibodies are associated with different types of syndromes. However, few studies have investigated the correlation between anti-GAD antibody titers with clinical severity and outcomes in children with encephalitis/encephalopathy. In this single-center retrospective cohort study, we consecutively enrolled hospitalized children who had encephalitis and/or encephalopathy with positive anti-GAD antibodies in serum and/or cerebrospinal fluid (CSF) from February 2010 to October 2021. Thirty-seven patients were included and divided into high-titer and low-titer groups. The patients with high anti-GAD antibody titers were associated with initial symptoms of language difficulty and ataxia. The level of titers was not associated with severity or outcomes. Anti-GAD antibody titers decreased after immunotherapy, however, the clinical response to immunotherapy was variable. A transient elevation in anti-GAD antibody titers during immunotherapy was noted. Further studies are warranted to investigate the role of anti-GAD antibodies in the pathogenesis and immune mechanisms of encephalitis/encephalopathy.
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Affiliation(s)
- Ju-Yin Hou
- Division of Pediatric Neurology, Department of Pediatric, Chang Gung Children’s Hospital and Chang Gung Memorial Hospital, Taoyuan City, Taiwan
| | - Hsin-Uei Liu
- Division of Pediatric Neurology, Department of Pediatric, Chang Gung Children’s Hospital and Chang Gung Memorial Hospital, Taoyuan City, Taiwan
| | - Cheng-Yen Kuo
- Division of Pediatric Neurology, Department of Pediatric, Chang Gung Children’s Hospital and Chang Gung Memorial Hospital, Taoyuan City, Taiwan
| | - Yi-Hsuan Liu
- Division of Pediatric Critical Care and Pediatric Neurocritical Care Center, Chang Gung Children’s Hospital and Chang Gung Memorial Hospital, Taoyuan City, Taiwan
| | - Jainn-Jim Lin
- College of Medicine, Chang Gung University, Taoyuan City, Taiwan,Division of Pediatric Critical Care and Pediatric Neurocritical Care Center, Chang Gung Children’s Hospital and Chang Gung Memorial Hospital, Taoyuan City, Taiwan
| | - Meng-Ying Hsieh
- Division of Pediatric Neurology, Department of Pediatric, Chang Gung Children’s Hospital and Chang Gung Memorial Hospital, Taoyuan City, Taiwan,College of Medicine, Chang Gung University, Taoyuan City, Taiwan
| | - Po-Cheng Hung
- Division of Pediatric Neurology, Department of Pediatric, Chang Gung Children’s Hospital and Chang Gung Memorial Hospital, Taoyuan City, Taiwan,College of Medicine, Chang Gung University, Taoyuan City, Taiwan
| | - Yi-Ting Cheng
- Division of Pediatric Neurology, Department of Pediatric, Chang Gung Children’s Hospital and Chang Gung Memorial Hospital, Taoyuan City, Taiwan
| | - I-Chen Su
- Division of Pediatric Neurology, Department of Pediatric, Chang Gung Children’s Hospital and Chang Gung Memorial Hospital, Taoyuan City, Taiwan
| | - Huei-Shyong Wang
- Division of Pediatric Neurology, Department of Pediatric, Chang Gung Children’s Hospital and Chang Gung Memorial Hospital, Taoyuan City, Taiwan,College of Medicine, Chang Gung University, Taoyuan City, Taiwan
| | - I-Jun Chou
- Division of Pediatric Neurology, Department of Pediatric, Chang Gung Children’s Hospital and Chang Gung Memorial Hospital, Taoyuan City, Taiwan,College of Medicine, Chang Gung University, Taoyuan City, Taiwan,I-Jun Chou,
| | - Kuang-Lin Lin
- Division of Pediatric Neurology, Department of Pediatric, Chang Gung Children’s Hospital and Chang Gung Memorial Hospital, Taoyuan City, Taiwan,College of Medicine, Chang Gung University, Taoyuan City, Taiwan,*Correspondence: Kuang-Lin Lin,
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30
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Räuber S, Schroeter CB, Strippel C, Nelke C, Ruland T, Dik A, Golombeck KS, Regner-Nelke L, Paunovic M, Esser D, Münch C, Rosenow F, van Duijn M, Henes A, Ruck T, Amit I, Leypoldt F, Titulaer MJ, Wiendl H, Meuth SG, Meyer Zu Hörste G, Melzer N. Cerebrospinal fluid proteomics indicates immune dysregulation and neuronal dysfunction in antibody associated autoimmune encephalitis. J Autoimmun 2023; 135:102985. [PMID: 36621173 DOI: 10.1016/j.jaut.2022.102985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 12/15/2022] [Indexed: 01/09/2023]
Abstract
Autoimmune Encephalitis (AE) spans a group of non-infectious inflammatory conditions of the central nervous system due to an imbalanced immune response. Aiming to elucidate the pathophysiological mechanisms of AE, we applied an unsupervised proteomic approach to analyze the cerebrospinal fluid (CSF) protein profile of AE patients with autoantibodies against N-methyl-d-aspartate receptor (NMDAR) (n = 9), leucine-rich glioma-inactivated protein 1 (LGI1) (n = 9), or glutamate decarboxylase 65 (GAD65) (n = 8) compared to 9 patients with relapsing-remitting multiple sclerosis as inflammatory controls, and 10 patients with somatic symptom disorder as non-inflammatory controls. We found a dysregulation of the complement system, a disbalance between pro-inflammatory and anti-inflammatory proteins on the one hand, and dysregulation of proteins involved in synaptic transmission, synaptogenesis, brain connectivity, and neurodegeneration on the other hand to a different extent in all AE subtypes compared to non-inflammatory controls. Furthermore, elevated levels of several proteases and reduction in protease inhibitors could be detected in all AE subtypes compared to non-inflammatory controls. Moreover, the different AE subtypes showed distinct protein profiles compared to each other and inflammatory controls which may facilitate future identification of disease-specific biomarkers. Overall, CSF proteomics provides insights into the complex pathophysiological mechanisms of AE, including immune dysregulation, neuronal dysfunction, neurodegeneration, and altered protease function.
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Affiliation(s)
- Saskia Räuber
- Department of Neurology with Institute of Translational Neurology, University of Münster, 48149, Münster, Germany; Department of Neurology, Medical Faculty, Heinrich Heine University of Düsseldorf, 40225 Düsseldorf, Germany
| | - Christina B Schroeter
- Department of Neurology with Institute of Translational Neurology, University of Münster, 48149, Münster, Germany; Department of Neurology, Medical Faculty, Heinrich Heine University of Düsseldorf, 40225 Düsseldorf, Germany
| | - Christine Strippel
- Department of Neurology with Institute of Translational Neurology, University of Münster, 48149, Münster, Germany
| | - Christopher Nelke
- Department of Neurology with Institute of Translational Neurology, University of Münster, 48149, Münster, Germany; Department of Neurology, Medical Faculty, Heinrich Heine University of Düsseldorf, 40225 Düsseldorf, Germany
| | - Tillmann Ruland
- Department of Psychiatry, University of Münster, 48149, Münster, Germany; Department of Psychiatry, Maria Brunn Hospital, 48163, Münster, Germany
| | - Andre Dik
- Department of Neurology with Institute of Translational Neurology, University of Münster, 48149, Münster, Germany; Department of Neurology, Medical Faculty, Heinrich Heine University of Düsseldorf, 40225 Düsseldorf, Germany
| | - Kristin S Golombeck
- Department of Neurology with Institute of Translational Neurology, University of Münster, 48149, Münster, Germany; Department of Neurology, Medical Faculty, Heinrich Heine University of Düsseldorf, 40225 Düsseldorf, Germany
| | - Liesa Regner-Nelke
- Department of Neurology with Institute of Translational Neurology, University of Münster, 48149, Münster, Germany; Department of Neurology, Medical Faculty, Heinrich Heine University of Düsseldorf, 40225 Düsseldorf, Germany
| | - Manuela Paunovic
- Department of Neurology, Erasmus MC University Medical Center, 3015 GD, Rotterdam, the Netherlands
| | - Daniela Esser
- Institute of Clinical Chemistry, University Hospital Schleswig-Holstein, 24105, Kiel, Lübeck, Germany
| | - Christian Münch
- Institute of Biochemistry II, Goethe University Frankfurt, Faculty of Medicine, Theodor-Stern-Kai 7, Building 75, 60590, Frankfurt am Main, Germany; Frankfurt Cancer Institute, Frankfurt am Main, Germany; Cardio-Pulmonary Institute, Frankfurt am Main, Germany
| | - Felix Rosenow
- Epilepsy Center Frankfurt Rhine-Main, Center of Neurology and Neurosurgery, University Hospital Frankfurt, Goethe University Frankfurt, 60528 Frankfurt am Main, Germany; LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Martijn van Duijn
- Department of Neurology, Erasmus MC University Medical Center, 3015 GD, Rotterdam, the Netherlands
| | - Antonia Henes
- Department of Neurology, Medical Faculty, Heinrich Heine University of Düsseldorf, 40225 Düsseldorf, Germany
| | - Tobias Ruck
- Department of Neurology with Institute of Translational Neurology, University of Münster, 48149, Münster, Germany; Department of Neurology, Medical Faculty, Heinrich Heine University of Düsseldorf, 40225 Düsseldorf, Germany
| | - Ido Amit
- Department of Immunology, Weizmann Institute of Science, 7610001, Rehovot, Israel
| | - Frank Leypoldt
- Institute of Clinical Chemistry, University Hospital Schleswig-Holstein, 24105, Kiel, Lübeck, Germany; Department of Neurology, Faculty of Medicine, Kiel University, 24105, Kiel, Germany
| | - Maarten J Titulaer
- Department of Neurology, Erasmus MC University Medical Center, 3015 GD, Rotterdam, the Netherlands
| | - Heinz Wiendl
- Department of Neurology with Institute of Translational Neurology, University of Münster, 48149, Münster, Germany
| | - Sven G Meuth
- Department of Neurology with Institute of Translational Neurology, University of Münster, 48149, Münster, Germany; Department of Neurology, Medical Faculty, Heinrich Heine University of Düsseldorf, 40225 Düsseldorf, Germany
| | - Gerd Meyer Zu Hörste
- Department of Neurology with Institute of Translational Neurology, University of Münster, 48149, Münster, Germany
| | - Nico Melzer
- Department of Neurology with Institute of Translational Neurology, University of Münster, 48149, Münster, Germany; Department of Neurology, Medical Faculty, Heinrich Heine University of Düsseldorf, 40225 Düsseldorf, Germany.
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31
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Binks S, Lamquet S, Crawford AH, Meurs A, Irani SR, Pakozdy A. Parallel roles of neuroinflammation in feline and human epilepsies. Vet J 2022; 290:105912. [PMID: 36209994 PMCID: PMC10912827 DOI: 10.1016/j.tvjl.2022.105912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 09/28/2022] [Accepted: 10/03/2022] [Indexed: 11/06/2022]
Abstract
Autoimmune encephalitis refers to a group of disorders characterised by a non-infectious encephalitis, often with prominent seizures and surface neuronal autoantibodies. AE is an important cause of new-onset refractory status epilepticus in humans and is frequently responsive to immunotherapies including corticosteroids, plasma exchange, intravenous immunoglobulin G and rituximab. Recent research suggests that parallel autoantibodies can be detected in non-human mammalian species. The best documented example is leucine-rich glioma-inactivated 1 (LGI1)-antibodies in domestic cats with limbic encephalitis (LE). In this review, we discuss the role of neuroinflammation and autoantibodies in human and feline epilepsy and LE.
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Affiliation(s)
- Sophie Binks
- Oxford Autoimmune Neurology Group, Nuffield Department of Clinical Neurosciences, University of Oxford, OX3 9DU, UK; Department of Neurology, John Radcliffe Hospital, Oxford University Hospitals Foundation Trust, Oxford OX3 9DU, UK.
| | - Simon Lamquet
- Department of Neurology, Ghent University Hospital, Ghent, Belgium
| | - Abbe H Crawford
- Clinical Science and Services, The Royal Veterinary College, Hertfordshire AL9 7TA, UK
| | - Alfred Meurs
- Department of Neurology, Ghent University Hospital, Ghent, Belgium
| | - Sarosh R Irani
- Oxford Autoimmune Neurology Group, Nuffield Department of Clinical Neurosciences, University of Oxford, OX3 9DU, UK; Department of Neurology, John Radcliffe Hospital, Oxford University Hospitals Foundation Trust, Oxford OX3 9DU, UK
| | - Akos Pakozdy
- University Clinic for Small Animals, University of Veterinary Medicine Vienna, Austria
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32
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Klötzsch C, Böhmert M, Hermann R, Teegen B, Rentzsch K, Till A. Anti-Homer-3 antibodies in cerebrospinal fluid and serum samples from a 58-year-old woman with subacute cerebellar degeneration and diffuse breast adenocarcinoma. Neurol Res Pract 2022; 4:29. [PMID: 35871640 PMCID: PMC9310468 DOI: 10.1186/s42466-022-00194-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 05/28/2022] [Indexed: 11/29/2022] Open
Abstract
Introduction Subacute cerebellar ataxia combined with cerebrospinal fluid (CSF) pleocytosis is the result of an immune response that can occur due to viral infections, paraneoplastic diseases or autoimmune-mediated mechanisms. In the following we present the first description of a patient with anti-Homer-3 antibodies in serum and CSF who has been diagnosed with paraneoplastic subacute cerebellar degeneration due to a papillary adenocarcinoma of the breast. Case presentation A 58-year-old female was admitted to our clinical department because of increasing gait and visual disturbances starting nine months ago. The neurological examination revealed a downbeat nystagmus, oscillopsia, a severe standing and gait ataxia and a slight dysarthria. Cranial MRI showed no pathological findings. Examination of CSF showed a lymphocytic pleocytosis of 11 cells/µl and an intrathecal IgG synthesis of 26%. Initially, standard serological testing in serum and CSF did not indicate any autoimmune or paraneoplastic aetiology. However, an antigen-specific indirect immunofluorescence test (IIFT) revealed the presence of anti-Homer-3 antibodies (IgG) with a serum titer of 1: 32,000 and a titer of 1: 100 in CSF. Subsequent histological examination of a right axillary lymph node mass showed papillary adenocarcinoma cells. Breast MRI detected multiple bilateral lesions as a diffuse tumour manifestation indicative of adenocarcinoma of the breast. Treatment with high-dose methylprednisolone followed by five plasmaphereses and treatment with 4-aminopyridine resulted in a moderate decrease of the downbeat nystagmus and she was able to move independently with a wheeled walker after 3 weeks. The patient was subsequently treated with chemotherapy (epirubicin, cyclophosphamide) and two series of immunoglobulins (5 × 30 g each). This resulted in a moderate improvement of the cerebellar symptoms with a decrease of ataxia and disappearance of the downbeat nystagmus. Conclusion The presented case of anti-Homer-3 antibody-associated cerebellar degeneration is the first that is clearly associated with the detection of a tumour. Interestingly, the Homer-3 protein interaction partner metabotropic glutamate receptor subtype 1A (mGluR1A) is predominantly expressed in Purkinje cells where its function is essential for motor coordination and motor learning. Based on our findings, in subacute cerebellar degeneration, we recommend considering serological testing for anti-Homer-3 antibodies in serum and cerebrospinal fluid together with tumor screening.
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Rößling R, Prüß H. Autoimmun vermittelte Enzephalitis. FORTSCHRITTE DER NEUROLOGIE · PSYCHIATRIE 2022; 90:529-542. [DOI: 10.1055/a-1803-8805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Autoimmunenzephalitiden bilden eine heterogene Gruppe neurologischer und
psychiatrischer Erkrankungen. Es werden Antikörper-vermittelte
Enzephalitiden von den häufig paraneoplastisch auftretenden
Antikörper-assoziierten Enzephalitiden unterschieden. Während
die Antikörper im ersten Fall direkt krankheitsverursachend sind, dienen
sie im zweiten Fall als diagnostischer Biomarker mit hoher Aussagekraft
für einen zugrunde liegenden Tumor.
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Sun Y, Wang H, Wang W, Lu J, Zhang J, Luo X, Luan L, Wang K, Jia J, Yan J, Qin L. Glutamatergic and GABAergic neurons in the preoptic area of the hypothalamus play key roles in menopausal hot flashes. Front Aging Neurosci 2022; 14:993955. [PMID: 36313017 PMCID: PMC9614233 DOI: 10.3389/fnagi.2022.993955] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 09/23/2022] [Indexed: 11/21/2022] Open
Abstract
During menopause, when estrogen levels are low, abnormalities in the hypothalamic preoptic area (POA) of the thermoregulatory center can cause hot flashes. However, the involved neural population has not been identified. Proteomics showed that under low estrogen, differentially expressed proteins in the hypothalamus were associated with glutamatergic and GABAergic synapses. RNAscope, Western blotting and qRT-PCR indicated that the number of glutamatergic neurons in the POA was decreased, while the number of GABAergic neurons was increased. Chemogenetics showed that the rat body temperature decreased slowly after glutamatergic neurons were activated and increased quickly after glutamatergic neurons were inhibited, while it increased quickly after GABAergic neurons were activated and decreased slowly after GABAergic neurons were inhibited. RNAscope, immunofluorescence, Western blotting and qRT-PCR further showed that glutamate decarboxylase (GAD) 1 expression in the POA was increased, while GAD2 expression in the POA was decreased; that thermosensitive transient receptor potential protein (ThermoTRP) M (TRPM) 2 expression in glutamatergic neurons was decreased, while TRPM8 expression in GABAergic neurons was increased; and that estrogen receptor (ER) α and β expression in the POA was decreased, and ERα and ERβ expressed in both glutamatergic and GABAergic neurons. Estrogen therapy corrected these abnormalities. In addition, CUT&Tag and Western blot after injection of agonists and inhibitors of ERs showed that ERα and ERβ were both transcription factors in glutamatergic and GABAergic synapses. Mechanistically, during menopause, estrogen may regulate the transcription and expression of GADs and ThermoTRPs through ERs, impacting the number and function of glutamatergic and GABAergic neurons, resulting in unbalanced heat dissipation and production in the POA and ultimately triggering hot flashes.
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Affiliation(s)
- Yanrong Sun
- Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Hanfei Wang
- Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Wenjuan Wang
- Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Jiali Lu
- Department of Stomatology, Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China
| | - Jinglin Zhang
- Department of Stomatology, Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China
| | - Xiaofeng Luo
- Department of Stomatology, Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China
| | - Liju Luan
- Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Ke Wang
- Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Jing Jia
- Department of Stomatology, Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China
- Department of Stomatology, The Third Medical Center, Chinese PLA General Hospital, Beijing, China
- Jing Jia,
| | - Junhao Yan
- Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
- Beijing Key Lab of Magnetic Resonance Imaging Technology, Peking University Third Hospital, Beijing, China
- Junhao Yan,
| | - Lihua Qin
- Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
- *Correspondence: Lihua Qin,
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Stezin A, Pal PK. Treatable Ataxias: How to Find the Needle in the Haystack? J Mov Disord 2022; 15:206-226. [PMID: 36065614 DOI: 10.14802/jmd.22069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 07/05/2022] [Indexed: 11/24/2022] Open
Abstract
Treatable ataxias are a group of ataxic disorders with specific treatments. These disorders include genetic and metabolic disorders, immune-mediated ataxic disorders, and ataxic disorders associated with infectious and parainfectious etiology, vascular causes, toxins and chemicals, and endocrinopathies. This review provides a comprehensive overview of different treatable ataxias. The major metabolic and genetic treatable ataxic disorders include ataxia with vitamin E deficiency, abetalipoproteinemia, cerebrotendinous xanthomatosis, Niemann-Pick disease type C, autosomal recessive cerebellar ataxia due to coenzyme Q10 deficiency, glucose transporter type 1 deficiency, and episodic ataxia type 2. The treatment of these disorders includes the replacement of deficient cofactors and vitamins, dietary modifications, and other specific treatments. Treatable ataxias with immune-mediated etiologies include gluten ataxia, anti-glutamic acid decarboxylase antibody-associated ataxia, steroid-responsive encephalopathy associated with autoimmune thyroiditis, Miller-Fisher syndrome, multiple sclerosis, and paraneoplastic cerebellar degeneration. Although dietary modification with a gluten-free diet is adequate in gluten ataxia, other autoimmune ataxias are managed by short-course steroids, plasma exchange, or immunomodulation. For autoimmune ataxias secondary to malignancy, treatment of tumor can reduce ataxic symptoms. Chronic alcohol consumption, antiepileptics, anticancer drugs, exposure to insecticides, heavy metals, and recreational drugs are potentially avoidable and treatable causes of ataxia. Infective and parainfectious causes of cerebellar ataxias include acute cerebellitis, postinfectious ataxia, Whipple's disease, meningoencephalitis, and progressive multifocal leukoencephalopathy. These disorders are treated with steroids and antibiotics. Recognizing treatable disorders is of paramount importance when dealing with ataxias given that early treatment can prevent permanent neurological sequelae.
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Affiliation(s)
- Albert Stezin
- Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India.,Centre for Brain Research, Indian Institute of Science, Bengaluru, India
| | - Pramod Kumar Pal
- Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
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Spilioti M, Kiryttopoulos A, Panou T, Simos P, Alexopoulos H, Karafyles G, Geroukis T, Kalevrosoglou I, Kimiskidis V. Nonparaneoplastic Anti-GAD Limbic Encephalitis: Seizure Outcome and Long-term Neuropsychological Follow-up After Immunotherapy. Cogn Behav Neurol 2022; 35:212-220. [PMID: 35856876 DOI: 10.1097/wnn.0000000000000313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 12/30/2021] [Indexed: 11/26/2022]
Abstract
Antibodies against glutamate decarboxylase (GAD-Abs), especially GAD65 antibodies, are associated with limbic encephalitis (LE) manifested by temporal lobe epilepsy and neuropsychological deficits. We present the case of a 42-year-old Greek woman with nonparaneoplastic anti-GAD LE, discussing the therapeutic management and highlighting the role of neuropsychological assessment. The patient underwent functional and structural brain studies and was investigated longitudinally over a 6-year period with a battery of neuropsychological tests that were designed to document her intellectual function and verbal and visual memory. The patient suffered from refractory temporal-impaired awareness seizures and memory impairment that was mediated by autoimmune nonparaneoplastic LE and comorbid autoimmune disorders (ie, Hashimoto thyroiditis and vitiligo). Neuroimaging studies demonstrated hyperintensities in the medial temporal lobes bilaterally on T2WI MRI sequences. Serial EEGs showed bitemporal intermittent delta activity as well as epileptiform discharges. Tumor blood markers and onconeural antibodies were negative. Immunological screening revealed extremely high GAD-Abs titers in both serum and CSF, as well as the presence of CSF oligoclonal bands. Neuropsychological testing revealed anterograde amnesia with relative preservation of more remote, premorbid memories. The patient underwent first-line immunotherapy followed by immunosuppressive maintenance treatment that led to a reduction of seizures, EEG improvement, and a significant decline in GAD-Abs titers. Neuropsychological evaluations at 5 months, 1 year, and 6 years posttreatment demonstrated improvement, particularly in recent memory and everyday functionality. In this case of anti-GAD LE, the long-term seizure reduction and the improvement of neuropsychological deficits were most likely related to the immunotherapy.
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Affiliation(s)
| | | | - Theodora Panou
- Department of Psychiatry & Laboratory of Neuropsychology, University of Crete, Medical School, Heraklion, Greece
| | - Panagiotis Simos
- Department of Psychiatry & Laboratory of Neuropsychology, University of Crete, Medical School, Heraklion, Greece
| | - Haris Alexopoulos
- Department of Pathophysiology, Neuroimmunology Unit, Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | | | | | - Ioannis Kalevrosoglou
- First Department of Internal Medicine, Aristotle University of Thessaloniki, AHEPA Hospital, Thessaloniki, Greece
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Autoimmune Encephalitis: A Physician’s Guide to the Clinical Spectrum Diagnosis and Management. Brain Sci 2022; 12:brainsci12091130. [PMID: 36138865 PMCID: PMC9497072 DOI: 10.3390/brainsci12091130] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 08/11/2022] [Accepted: 08/15/2022] [Indexed: 11/25/2022] Open
Abstract
The rapidly expanding spectrum of autoimmune encephalitis in the last fifteen years is largely due to ongoing discovery of many neuronal autoantibodies. The diagnosis of autoimmune encephalitis can be challenging due to the wide spectrum of clinical presentations, prevalence of psychiatric features that mimic primary psychiatric illnesses, frequent absence of diagnostic abnormalities on conventional brain MR-imaging, non-specific findings on EEG testing, and the lack of identified IgG class neuronal autoantibodies in blood or CSF in a subgroup of patients. Early recognition and treatment are paramount to improve outcomes and achieve complete recovery from these debilitating, occasionally life threatening, disorders. This review is aimed to provide primary care physicians and hospitalists who, together with neurologist and psychiatrists, are often the first port of call for individuals presenting with new-onset neuropsychiatric symptoms, with up-to-date data and evidence-based approach to the diagnosis and management of individuals with neuropsychiatric disorders of suspected autoimmune origin.
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Newsome SD, Johnson T. Stiff person syndrome spectrum disorders; more than meets the eye. J Neuroimmunol 2022; 369:577915. [PMID: 35717735 PMCID: PMC9274902 DOI: 10.1016/j.jneuroim.2022.577915] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 05/21/2022] [Accepted: 06/07/2022] [Indexed: 10/18/2022]
Abstract
Stiff person syndrome spectrum disorders (SPSD) are a group of rare neuroimmunological disorders that often include painful spasms and rigidity. However, patients have highly heterogeneous signs and symptoms which may reflect different mechanistic disease processes. Understanding subsets of patients based on clinical phenotype may be important for prognosis and guiding treatment. The goal of this review is to provide updates on SPSD and its expanding clinical spectrum, prognostic markers, and treatment considerations. Further, we describe the current understanding in immunopathogenesis and highlight gaps in our knowledge appropriate for future research directions. Examples of revised diagnostic criteria for SPSD based on phenotype are also presented.
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Affiliation(s)
- Scott D Newsome
- Johns Hopkins University School of Medicine, Baltimore, MD, USA.
| | - Tory Johnson
- Johns Hopkins University School of Medicine, Baltimore, MD, USA; Section of Infections of the Nervous System, NINDS, NIH, Bethesda, MD, USA
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Muñiz-Castrillo S, Vogrig A, Ciano-Petersen NL, Villagrán-García M, Joubert B, Honnorat J. Novelties in Autoimmune and Paraneoplastic Cerebellar Ataxias: Twenty Years of Progresses. CEREBELLUM (LONDON, ENGLAND) 2022; 21:573-591. [PMID: 35020135 DOI: 10.1007/s12311-021-01363-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/23/2021] [Indexed: 06/14/2023]
Abstract
Major advances in our knowledge concerning autoimmune and paraneoplastic cerebellar ataxias have occurred in the last 20 years. The discovery of several neural antibodies represents an undeniable contribution to this field, especially those serving as good biomarkers of paraneoplastic neurological syndromes and those showing direct pathogenic effects. Yet, many patients still lack detectable or known antibodies, and also many antibodies have only been reported in few patients, which makes it difficult to define in detail their clinical value. Nevertheless, a notable progress has additionally been made in the clinical characterization of patients with the main neural antibodies, which, although typically present with a subacute pancerebellar syndrome, may also show either hyperacute or chronic onsets that complicate the differential diagnoses. However, prodromal and transient features could be useful clues for an early recognition, and extracerebellar involvement may also be highly indicative of the associated antibody. Moreover, important advances in our understanding of the pathogenesis of cerebellar ataxias include the description of antibody effects, especially those targeting cell-surface antigens, and first attempts to isolate antigen-specific T-cells. Furthermore, genetic predisposition seems relevant, although differently involved according to cancer association, with particular HLA observed in non-paraneoplastic cases and genetic abnormalities in the tumor cells in paraneoplastic ones. Finally, immune checkpoint inhibitors used as cancer immunotherapy may rarely induce cerebellar ataxias, but even this undesirable effect may in turn serve to shed some light on their physiopathology. Herein, we review the principal novelties of the last 20 years regarding autoimmune and paraneoplastic cerebellar ataxias.
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Affiliation(s)
- Sergio Muñiz-Castrillo
- French Reference Center on Paraneoplastic Neurological Syndromes and Autoimmune Encephalitis, Hospices Civils de Lyon, Hôpital Neurologique, 59 Boulevard Pinel, 69677, Bron Cedex, France
- SynatAc Team, Institut NeuroMyoGène, INSERM U1217, CNRS, UMR 5310, Université de Lyon, Université Claude Bernard Lyon 1, Lyon, France
| | - Alberto Vogrig
- French Reference Center on Paraneoplastic Neurological Syndromes and Autoimmune Encephalitis, Hospices Civils de Lyon, Hôpital Neurologique, 59 Boulevard Pinel, 69677, Bron Cedex, France
- SynatAc Team, Institut NeuroMyoGène, INSERM U1217, CNRS, UMR 5310, Université de Lyon, Université Claude Bernard Lyon 1, Lyon, France
| | - Nicolás Lundahl Ciano-Petersen
- French Reference Center on Paraneoplastic Neurological Syndromes and Autoimmune Encephalitis, Hospices Civils de Lyon, Hôpital Neurologique, 59 Boulevard Pinel, 69677, Bron Cedex, France
- SynatAc Team, Institut NeuroMyoGène, INSERM U1217, CNRS, UMR 5310, Université de Lyon, Université Claude Bernard Lyon 1, Lyon, France
| | - Macarena Villagrán-García
- French Reference Center on Paraneoplastic Neurological Syndromes and Autoimmune Encephalitis, Hospices Civils de Lyon, Hôpital Neurologique, 59 Boulevard Pinel, 69677, Bron Cedex, France
- SynatAc Team, Institut NeuroMyoGène, INSERM U1217, CNRS, UMR 5310, Université de Lyon, Université Claude Bernard Lyon 1, Lyon, France
| | - Bastien Joubert
- French Reference Center on Paraneoplastic Neurological Syndromes and Autoimmune Encephalitis, Hospices Civils de Lyon, Hôpital Neurologique, 59 Boulevard Pinel, 69677, Bron Cedex, France
- SynatAc Team, Institut NeuroMyoGène, INSERM U1217, CNRS, UMR 5310, Université de Lyon, Université Claude Bernard Lyon 1, Lyon, France
| | - Jérôme Honnorat
- French Reference Center on Paraneoplastic Neurological Syndromes and Autoimmune Encephalitis, Hospices Civils de Lyon, Hôpital Neurologique, 59 Boulevard Pinel, 69677, Bron Cedex, France.
- SynatAc Team, Institut NeuroMyoGène, INSERM U1217, CNRS, UMR 5310, Université de Lyon, Université Claude Bernard Lyon 1, Lyon, France.
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Shivaram S, Tallapalli AVR, Gupta M, Nashi S, Kulkarni GB, Alladi S. Spontaneous Downbeat Nystagmus in Anti-GAD-Antibody-Associated Paraneoplastic Syndrome. J Neurosci Rural Pract 2022; 13:546-549. [PMID: 35971396 PMCID: PMC9375676 DOI: 10.1055/s-0042-1749404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Spontaneous downbeat nystagmus and ocular flutter are rare clinical signs. Such findings are commonly related to cerebellar pathology, predominantly ischemia. In a significant percentage of patients, the cause may not be found. If these signs are associated with ataxia, cognitive decline, and seizure, anti-glutamic acid decarboxylase-associated neurological syndrome must be suspected. Background history of tumor has to be enquired. Treatment with immune modulation helps in partial recovery of such cases.
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Affiliation(s)
- Sumanth Shivaram
- Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Ashok V Reddy Tallapalli
- Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Manisha Gupta
- Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Saraswati Nashi
- Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Girish B Kulkarni
- Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Suvarna Alladi
- Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
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Abstract
Autoimmune encephalitis is a group of central nervous system (CNS) inflammatory disorders that most commonly affect young adults and children. These disorders are closely associated with antibodies against neuronal cell-surface proteins, receptors, and ion channels; however, some forms of the disorder have no known antibody at this time. In children, neurological manifestations such as seizure, movement disorders, and focal neurological deficits are more prominent at initial presentation than psychiatric or behavioral symptoms. When psychiatric symptoms do occur, they often manifest as temper tantrums, aggression, agitation, and rarely psychosis. Prompt diagnosis and early treatment can lead to improved outcomes and decreased relapses. First-line therapies include intravenous steroids, intravenous immunoglobulin, and plasmapheresis, whereas rituximab and cyclophosphamide are utilized for refractory or relapsing disease. This review highlights the different forms of this disorder, discusses approach to diagnosis and treatment, and reviews the outcome and prognosis of children diagnosed with different forms of autoimmune encephalitis.
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Neuronal and Neuroaxonal Damage Cerebrospinal Fluid Biomarkers in Autoimmune Encephalitis Associated or Not with the Presence of Tumor. Biomedicines 2022; 10:biomedicines10061262. [PMID: 35740284 PMCID: PMC9220160 DOI: 10.3390/biomedicines10061262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/17/2022] [Accepted: 05/20/2022] [Indexed: 02/05/2023] Open
Abstract
The aim of this study was to evaluate the association of neuronal damage biomarkers (neurofilament light chain (NFL) and total tau protein (T-tau)) in the CSF of patients with autoimmune encephalitis (AE) with the presence of an underlying malignancy and to determine correlations with patient characteristics. The study comprised 21 patients with encephalitis associated with antibodies against intracellular (n = 11) and surface/synaptic antigens (extracellular, n = 10) and non-inflammatory disease controls (n = 10). Patients with AE associated with intracellular antigens had increased CSF-NFL (p = 0.003) but not T-tau levels compared to controls. When adjusted for age, CSF-NFL but not CSF-T-tau was higher in patients with encephalitis associated with intracellular antigens as compared to those with encephalitis associated with extracellular antigens (p = 0.032). Total tau and NFL levels were not significantly altered in patients with encephalitis associated with extracellular antigens compared to controls. NFL in the total cohort correlated with neurological signs of cerebellar dysfunction, peripheral neuropathy, presence of CV2 positivity, presence of an underlying tumor and a more detrimental clinical outcome. AE patients with abnormal MRI findings displayed higher NFL levels compared to those without, albeit with no statistical significance (p = 0.07). Using receiver operating characteristic curve analysis, CSF-NFL levels with a cut-off value of 969 pg/mL had a sensitivity and specificity of 100% and 76.19%, respectively, regarding the detection of underlying malignancies. Our findings suggest that neuronal integrity is preserved in autoimmune encephalitis associated with extracellular antigens and without the presence of tumor. However, highly increased NFL is observed in AE associated with intracellular antigens and presence of an underlying tumor. CSF-NFL could potentially be used as a diagnostic biomarker of underlying malignancies in the clinical setting of AE.
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Hsieh PC, Wu YR. Diagnosis and Clinical Features in Autoimmune-Mediated Movement Disorders. J Mov Disord 2022; 15:95-105. [PMID: 35670020 PMCID: PMC9171305 DOI: 10.14802/jmd.21077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 04/16/2022] [Accepted: 04/18/2022] [Indexed: 11/24/2022] Open
Abstract
Movement disorders are common manifestations in autoimmune-mediated encephalitis. This group of diseases is suspected to be triggered by infection or neoplasm. Certain phenotypes correlate with specific autoantibody-related neurological disorders, such as orofacial-lingual dyskinesia with N-methyl-D-aspartate receptor encephalitis and faciobrachial dystonic seizures with leucine-rich glioma-inactivated protein 1 encephalitis. Early diagnosis and treatment, especially for autoantibodies targeting neuronal surface antigens, can improve prognosis. In contrast, the presence of autoantibodies against intracellular neuronal agents warrants screening for underlying malignancy. However, early clinical diagnosis is challenging because these diseases can be misdiagnosed. In this article, we review the distinctive clinical phenotypes, magnetic resonance imaging findings, and current treatment options for autoimmune-mediated encephalitis.
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Affiliation(s)
- Pei-Chen Hsieh
- Department of Neurology, Chang Gung Memorial Hospital, Linkou Medical Center, Taoyuan, Taiwan
| | - Yih-Ru Wu
- Department of Neurology, Chang Gung Memorial Hospital, Linkou Medical Center, Taoyuan, Taiwan
- Department of Neurology, Chang Gung University, College of Medicine, Taoyuan, Taiwan
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[18F]FDG brain PET and clinical symptoms in different autoantibodies of autoimmune encephalitis: a systematic review. Neurol Sci 2022; 43:4701-4718. [PMID: 35486333 DOI: 10.1007/s10072-022-06094-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2022] [Accepted: 04/21/2022] [Indexed: 12/17/2022]
Abstract
INTRODUCTION Autoimmune encephalitis (AE) is caused by the antibodies that target receptors and intracellular or surface proteins. To achieve the appropriate therapeutic results, early and proper diagnosis is still the most important issue. In this review, we provide an overview of FDG-PET imaging findings in AE patients and possible relation to different subtypes and clinical features. METHODS PubMed, Web of Science, and Scopus were searched in August 2021 using a predefined search strategy. RESULTS After two-step reviewing, 22 studies with a total of 332 participants were entered into our qualitative synthesis. In anti-NMDAR encephalitis, decreased activity in the occipital lobe was present, in addition, to an increase in frontal, parietal, and specifically medial temporal activity. Anti-VGKC patients showed altered metabolism in cortical and subcortical regions such as striata and cerebellum. Abnormal metabolism in patients with anti-LGI1 has been reported in diverse areas of the brain including medial temporal, hippocampus, cerebellum, and basal ganglia all of which had hypermetabolism. Hypometabolism in parietal, frontal, occipital lobes, temporal, frontal, and hippocampus was observed in AE patients with anti-GAD antibodies. CONCLUSION Our results indicate huge diversity in metabolic patterns among different AE subtypes and it is hard to draw a firm conclusion. Moreover, the timing of imaging, seizures, and acute treatments can alter the PET patterns strongly. Further prospective investigations with specific inclusion and exclusion criteria should be carried out to identify the metabolic defect in different AE subtypes.
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Maimaiti B, Mijiti S, Sun H, Xie Y, Jiang T, Meng Q, Meng H. Are anti-glutamic acid decarboxylase 65-kDa isoform antibodies related to diabetes or brain tumor? Eur J Med Res 2022; 27:53. [PMID: 35387690 PMCID: PMC8985350 DOI: 10.1186/s40001-022-00674-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 03/11/2022] [Indexed: 11/19/2022] Open
Abstract
Background Antibodies against the 65-kDa isoform of glutamic acid decarboxylase (GAD65) are biomarkers of autoimmune disorders and are more common in non-neurological autoimmune diseases than in neurological disorders. As for the central nervous system (CNS), it is well known that GAD65 is primarily associated with stiff-person syndrome, cerebellar ataxia, epilepsy, and paraneoplastic neurological syndrome. However, GAD65 antibodies have not been reported in patients with brain tumors. Case presentation This study presents the case of a 62-year-old man who manifested rapidly progressive dizziness with gradually worsening physical disturbance and unstable gait in the 2 months prior to consultation. Antibodies against GAD65 were detected in his serum. Brain magnetic resonance imaging (MRI) showed abnormal signals in the corpus callosum, the semi-oval center in both hemispheres, and the area below the frontal cortex, along with enhanced intracranial lesions in the same regions. Positron emission tomography–computed tomography (PET–CT) showed high metabolism in the corpus callosum, which protruded into both ventricles. Due to signs of malignancy, the patient was diagnosed with a malignant glioma. Conclusions This case raises awareness on the fact that anti-GAD65 antibodies may be associated with CNS neoplastic lesions. Early recognition of anti-GAD antibodies could be of great importance for the early diagnosis and targeted treatment of neoplastic lesions, and could lead to better prognosis.
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Affiliation(s)
- Buajieerguli Maimaiti
- Department of Neurology and Neuroscience Center, First Hospital of Jilin University, Changchun, Jilin, People's Republic of China
| | - Salamaitiguli Mijiti
- Department of Neurology and Neuroscience Center, First Hospital of Jilin University, Changchun, Jilin, People's Republic of China
| | - Huaiyu Sun
- Department of Neurology and Neuroscience Center, First Hospital of Jilin University, Changchun, Jilin, People's Republic of China
| | - Yinyin Xie
- Department of Neurology and Neuroscience Center, First Hospital of Jilin University, Changchun, Jilin, People's Republic of China
| | - Ting Jiang
- Department of Neurology and Neuroscience Center, First Hospital of Jilin University, Changchun, Jilin, People's Republic of China
| | - Qian Meng
- Department of Neurology and Neuroscience Center, First Hospital of Jilin University, Changchun, Jilin, People's Republic of China
| | - Hongmei Meng
- Department of Neurology and Neuroscience Center, First Hospital of Jilin University, Changchun, Jilin, People's Republic of China.
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Acute Cerebellar Inflammation and Related Ataxia: Mechanisms and Pathophysiology. Brain Sci 2022; 12:brainsci12030367. [PMID: 35326323 PMCID: PMC8946185 DOI: 10.3390/brainsci12030367] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/07/2022] [Accepted: 03/08/2022] [Indexed: 12/11/2022] Open
Abstract
The cerebellum governs motor coordination and motor learning. Infection with external microorganisms, such as viruses, bacteria, and fungi, induces the release and production of inflammatory mediators, which drive acute cerebellar inflammation. The clinical observation of acute cerebellitis is associated with the emergence of cerebellar ataxia. In our animal model of the acute inflammation of the cerebellar cortex, animals did not show any ataxia but hyperexcitability in the cerebellar cortex and depression-like behaviors. In contrast, animal models with neurodegeneration of the cerebellar Purkinje cells and hypoexcitability of the neurons show cerebellar ataxia. The suppression of the Ca2+-activated K+ channels in vivo is associated with a type of ataxia. Therefore, there is a gap in our interpretation between the very early phase of cerebellar inflammation and the emergence of cerebellar ataxia. In this review, we discuss the hypothesized scenario concerning the emergence of cerebellar ataxia. First, compared with genetically induced cerebellar ataxias, we introduce infection and inflammation in the cerebellum via aberrant immunity and glial responses. Especially, we focus on infections with cytomegalovirus, influenza virus, dengue virus, and SARS-CoV-2, potential relevance to mitochondrial DNA, and autoimmunity in infection. Second, we review neurophysiological modulation (intrinsic excitability, excitatory, and inhibitory synaptic transmission) by inflammatory mediators and aberrant immunity. Next, we discuss the cerebellar circuit dysfunction (presumably, via maintaining the homeostatic property). Lastly, we propose the mechanism of the cerebellar ataxia and possible treatments for the ataxia in the cerebellar inflammation.
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Nakano T, Chihara N, Matoba K, Tachibana H, Okuda S, Otsuka Y, Ueda T, Sekiguchi K, Kowa H, Leypoldt F, Wandinger KP, Matsumoto R. Immunotherapy-responsive Non-paraneoplastic Encephalitis with Antibodies against GAD, LGI1, and GABA A Receptor. Intern Med 2022; 61:419-423. [PMID: 34334569 PMCID: PMC8866773 DOI: 10.2169/internalmedicine.7846-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A 62-year-old man showed abnormal behavior. Brain magnetic resonance imaging revealed multifocal lesions on T2-weighted images. Initial screening revealed that he was seropositive for antibodies against glutamate decarboxylase, which usually indicates treatment resistance to autoimmune encephalitis (AE). Intensive immunosuppressive therapies, however, improved the neurological symptoms. In line with this, we also detected seropositivity for antibodies against leucine-rich glioma-inactivated 1 and gamma-aminobutyric acid A receptor (GABAAR). Brain imaging and treatment responsiveness suggested that antibodies against GABAAR were the main cause of symptoms. Furthermore, the patient showed the presence of triple anti-neural antibodies in the absence of malignancy and had a favorable clinical course.
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Affiliation(s)
- Takahiro Nakano
- Division of Neurology, Kobe University Graduate School of Medicine, Japan
| | - Norio Chihara
- Division of Neurology, Kobe University Graduate School of Medicine, Japan
| | - Kento Matoba
- Division of Neurology, Kobe University Graduate School of Medicine, Japan
| | | | - Shiho Okuda
- Department of Neurology, Hyogo Rehabilitation Center Hospital, Japan
| | - Yoshihisa Otsuka
- Division of Neurology, Kobe University Graduate School of Medicine, Japan
| | - Takehiro Ueda
- Division of Neurology, Kobe University Graduate School of Medicine, Japan
| | - Kenji Sekiguchi
- Division of Neurology, Kobe University Graduate School of Medicine, Japan
| | - Hisatomo Kowa
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Japan
| | - Frank Leypoldt
- Institute of Clinical Chemistry, University Hospital Schleswig-Holstein, Germany
| | | | - Riki Matsumoto
- Division of Neurology, Kobe University Graduate School of Medicine, Japan
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Dimova P, Minkin K. Case Report: Multisystem Autoimmune and Overlapping GAD65-Antibody-Associated Neurological Disorders With Beneficial Effect of Epilepsy Surgery and Rituximab Treatment. Front Neurol 2022; 12:756668. [PMID: 35126284 PMCID: PMC8810502 DOI: 10.3389/fneur.2021.756668] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 12/13/2021] [Indexed: 12/18/2022] Open
Abstract
Glutamic acid decarboxylase (GAD) antibodies are associated with disabling conditions such as stiff person syndrome, temporal lobe epilepsy (TLE), limbic encephalitis, cerebellar ataxia (CA), and ocular movement disorders, which are usually chronic and difficult to treat. GAD-related TLE has poor response to anti-seizure medications and immune therapies, and epilepsy surgery is rarely successful. We report on a 47-year-old female with history of migraine, autoimmune thyroid disease, ankylosing spondylitis, and drug-resistant TLE. A video electroencephalography recorded frequent seizures with temporo-insular semiology, correlating to left temporal epileptiform activity and left mesiotemporal hyperintensity on magnetic resonance imaging. GAD autoimmunity was confirmed by very high GAD antibody titers in serum and cerebrospinal fluid. Steroids, immunoglobulins, and cyclophosphamide had no effect, and selective left amygdalectomy was performed based on very restricted hypermetabolism on positron-emission tomography. After transient seizure freedom, significant epilepsy improvement was observed in spite of memory decline. Transient worsening was noted 1 year later during diabetes mellitus manifestation and 5 years later during presentation of progressive CA, which stabilized on rituximab treatment. We believe this case illustrates the diversity and the frequent overlap of GAD-associated disorders, the need of early and aggressive immunotherapy in severe patients, as well as the possible benefit from epilepsy surgery in some GAD-TLE.
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Affiliation(s)
- Petia Dimova
- Epileptology Unit at Epilepsy Surgery Center, Department of Neurosurgery, St. Ivan Rilski University Hospital, Sofia, Bulgaria
- *Correspondence: Petia Dimova
| | - Krassimir Minkin
- Functional and Epilepsy Surgery Center, Department of Neurosurgery, St. Ivan Rilski University Hospital, Sofia, Bulgaria
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Movement disorders associated with neuronal antibodies: a data-driven approach. J Neurol 2022; 269:3511-3521. [PMID: 35024921 PMCID: PMC8756747 DOI: 10.1007/s00415-021-10934-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 12/06/2021] [Indexed: 11/17/2022]
Abstract
Background Movement disorders can be associated with anti-neuronal antibodies. Methods We conducted a systematic review of cases with documented anti-neuronal antibodies in serum and/or cerebrospinal fluid published in PubMed before April 1, 2020. Only patients with at least one movement disorder were included. We used random forests for variable selection and recursive partitioning and regression trees for the creation of a data-driven decision algorithm, integrated with expert’s clinical feedback.
Results Three hundred and seventy-seven studies met eligibility criteria, totaling 844 patients and 13 antibodies: amphiphysin, GAD, GlyR, mGluR1, ANNA-2/Ri, Yo/PCA-1, Caspr2, NMDAR, LGI-1, CRMP5/CV2, ANNA-1/Hu, IgLON5, and DPPX. Stiffness/rigidity/spasm spectrum symptoms were more frequently associated with amphiphysin, GAD, and GlyR; ataxia with mGluR1, ANNA-2/Ri, Yo/PCA-1, Caspr2, and ANNA-1/Hu; dyskinesia with NMDAR and paroxysmal movement with LGI1; chorea/choreoathetosis with CRMP5/CV2, IgLON5, and NMDAR; myoclonus with GlyR and DPPX; tremors with ANNA2/Ri and anti-DPPX; and parkinsonism with IgLON5 and NMDAR. Data-driven classification analysis determined the following diagnostic predictions (with probability selection): psychiatric symptoms and dyskinesia predicted NMDAR (71% and 87%, respectively); stiffness/rigidity/spasm and ataxia, GAD (67% and 47%, respectively); ataxia and opsoclonus, ANNA-2/Ri (68%); chorea/choreoathetosis, CRMP5/CV2 (41%). These symptoms remained the top predictors in random forests analysis. The integration with an expert opinion analysis refined the precision of the approach. Breast and lung tumors were the most common tumors. On neuroimaging, cerebellar involvement was associated with GAD and Yo/PCA-1; temporal involvement with Caspr2, LGI-1, ANNA-1/Hu.
Conclusion Selected movement disorders are associated with specific anti-neuronal antibodies. The combination of data-driven and expert opinion approach to the diagnosis may assist early management efforts.
Supplementary Information The online version contains supplementary material available at 10.1007/s00415-021-10934-7.
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Abstract
Limbic encephalitis (LE) is a clinical syndrome defined by subacutely evolving limbic signs and symptoms with structural and functional evidence of mediotemporal damage in the absence of a better explanation than an autoimmune (or paraneoplastic) cause. There are features common to all forms of LE. In recent years, antibody(ab)-defined subtypes have been established. They are distinct regarding underlying pathophysiologic processes, clinical and magnetic resonance imaging courses, cerebrospinal fluid signatures, treatment responsivity, and likelihood of a chronic course. With immunotherapy, LE with abs against surface antigens has a better outcome than LE with abs to intracellular antigens. Diagnostic and treatment challenges are, on the one hand, to avoid overlooking and undertreatment and, on the other hand, to avoid overdiagnoses and overtreatment. LE can be conceptualized as a model disease for the consequences of new onset mediotemporal damage by different mechanisms in adult life. It may be studied as an example of mediotemporal epileptogenesis.
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Affiliation(s)
- Christian G Bien
- Department of Epileptology (Krankenhaus Mara), Bielefeld University, Bielefeld, Germany; Laboratory Krone, Bad Salzuflen, Germany.
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