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Jarius S.,Weatherall Institute of Molecular Medicine | Jarius S.,University of Heidelberg | Frederikson J.,Copenhagen University | Waters P.,Weatherall Institute of Molecular Medicine | And 12 more authors.
Journal of the Neurological Sciences | Year: 2010

Background: Antibodies to aquaporin-4 (AQP4-Ab) are found in 60-80% of patients with neuromyelitis optica (NMO), a severely disabling inflammatory CNS disorder of putative autoimmune aetiology, which predominantly affects the optic nerves and spinal cord. Objective: To assess the frequency of AQP4-Ab in patients with optic neuritis (ON), and to investigate the prognostic implications of AQP4-Ab seropositivity in such patients. Patients and methods: AQP4-Ab serum levels were determined in 224 individuals from Austria, Denmark, France, Germany, Italy, and Turkey using a newly developed fluorescence immunoprecipitation assay employing recombinant human AQP4. Results: AQP4-Ab were detectable in 8/139 (5.8%) patients with acute monosymptomatic optic neuritis (AMON) and in 10/17 (58.8%) patients with established NMO and a last relapse of acute ON (NMO/ON), but not in 32 patients with multiple sclerosis or in 36 healthy controls. At last examination, 4/8 (50%) seropositive AMON patients had met the criteria for NMO but 0/128 seronegative AMON patients. Disease severity differed significantly between seropositive and seronegative AMON. Complete bilateral or unilateral blindness occurred in six AQP4-Ab positive patients, but only in one AQP4-Ab negative patient. AQP4-Ab levels did not vary between seropositive AMON and NMO/ON and did not correlate with disease severity. Female gender, a relapsing course, and concomitant autoimmunity were associated with AQP4-Ab seropositive status and risk of developing NMO. Conclusion: AQP4-Ab is relatively rare among patients with AMON, but if present it predicts a high rate of conversion to NMO within one year. © 2010 Elsevier B.V. Source


Dogan Onugoren M.,Epilepsy Center Bethel | Rauschka H.,Sozialmedizinisches Zentrum Ost Donauspital | Bien C.G.,Epilepsy Center Bethel
Journal of Neuroimmunology | Year: 2014

Antibodies (abs) to the GABAB receptor have been recently found to be responsible for immune-mediated encephalitis with dominant seizures. They are in approximately 50% of cases associated with small-cell lung cancer (SCLC). GABAB receptors are mainly located in the hippocampus, thalamus and cerebellum in the presynaptic and postsynaptic regions of synapses. The main function of these receptors is to reduce activity states of neurons. In some instances, GABAB receptor abs in these patients were accompanied by other antibodies, among them VGCC abs (Lancaster et al., 2010, Boronat et al., 2011). VGCC abs cause paraneoplastic Lambert Eaton myasthenic syndrome (LEMS) by reduction of presynaptic VGCCs (Titulaer et al., 2011). In the domain of CNS disease, VGCC abs have been found in association with paraneoplastic cerebellar ataxia (Mason et al., 1997) and rarely and at low titres also in other paraneoplastic encephalopathies together with Hu abs (Lennon et al., 1995). It has been a long-standing debate if abs in paraneoplastic conditions associate rather with the neurological syndrome or the tumour.Here, we describe the conjoint occurrence of abs to the GABAB receptor and to the VGCC in a patient with SCLC presenting only symptoms of the peripheral nervous system giving another example of the latter hypothesis. © 2014 Elsevier B.V. Source


Funk G.-C.,Ludwig Boltzmann Research Institute | Anders S.,Ludwig Boltzmann Research Institute | Breyer M.-K.,Ludwig Boltzmann Research Institute | Burghuber O.C.,Ludwig Boltzmann Research Institute | And 8 more authors.
European Respiratory Journal | Year: 2010

Weaning from mechanical ventilation was categorised as simple, difficult or prolonged by an international task force of the American Thoracic Society/European Respiratory Society/European Society of Intensive Care Medicine/Society of Critical Care Medicine/Sociéte de Réanimation de Langue Française in 2007. This new classification has not been tested in clinical practice. The objective of the present study was to determine the incidence and outcome of weaning according to the new categories. We included medical and surgical patients who required mechanical ventilation in a prospective, multicentre, 6-month cohort study. From an initial cohort of 510 patients, 257 intubated patients started weaning. Of these patients, the cumulative incidences of simple, difficult, and prolonged weaning were 152 (59%), 68 (26%) and 37 (14%), respectively. Hospital mortality was increased in patients with prolonged (32%) but not difficult (9%) weaning in comparison with those with simple weaning (13%), overall p=0.0205. In a multivariate logistic regression model, prolonged but not difficult weaning was associated with an increased risk of death. Ventilator-free days and intensive care unit (ICU)-free days were decreased in both difficult and prolonged weaning. In conclusion, the new weaning category prolonged weaning is associated with increased mortality and morbidity in the ICU. The new category difficult to wean was associated with increased morbidity, but not mortality. Copyright©ERS Journals Ltd 2010. Source


Jarius S.,University of Heidelberg | Paul F.,Charite - Medical University of Berlin | Franciotta D.,National Neurological Institute C Mondino | De Seze J.,Clinique neurologique | And 10 more authors.
Multiple Sclerosis Journal | Year: 2012

Background: Neuromyelitis optica (NMO, Devic syndrome) and myasthenia gravis (MG) are rare antibody-mediated autoimmune disorders. Concurrent incidence has been reported in only few patients, mostly non-Caucasians. Objective: To report on ten Caucasian patients with NMO spectrum disorders (NMOSD) and MG and to provide a comprehensive review of the literature. Method: Retrospective study. Results: In total, 26 patients (m:f = 1:12; Caucasian in 12) with MG (generalized in 17) and NMOSD (NMO in 21, longitudinally extensive transverse myelitis in five) were identified from the authors' own files (n = 10) and the previous literature (n = 16). MG preceded NMOSD in 24/25 cases (96%). AQP4-Ab were tested in 20 patients and were positive in 17 (85%). Twenty out of 25 patients (80%) had been treated with thymectomy or thymic irradiation, which preceded NMOSD in all cases (median latency, 12 years; range, 0.3-32). At last follow-up, complete remission of MG was reported in 15/22 (68%), and MG was well controlled with pyridostigmine in three. Co-existing autoimmune disorders or autoimmune antibodies were reported in 17 patients. Conclusion: Our study demonstrates that i) AQP4-Ab-positive NMOSD are more commonly associated with MG in Caucasians than previously thought; ii) MG precedes NMOSD in most cases, often by more than a decade; iii) NMOSD almost exclusively occur in females with juvenile or early-onset MG; and iv) MG frequently takes an unusually mild course in patients with NMOSD. A history of thymectomy could be a possible risk factor for the later development of NMOSD. We recommend testing for AQP4-Ab in MG patients presenting with atypical motor or optic symptoms. © The Author(s) 2012. Source


Jarius S.,University of Heidelberg | Paul F.,University Medicine Berlin | Franciotta D.,National Neurological Institute C Mondino | Ruprecht K.,University Medicine Berlin | And 14 more authors.
Journal of the Neurological Sciences | Year: 2011

Background: Neuromyelitis optica (NMO, Devic disease) is a severely disabling autoimmune disorder of the CNS, which was considered a subtype of multiple sclerosis (MS) for many decades. Recently, however, highly specific serum autoantibodies (termed NMO-IgG or AQP4-Ab) have been discovered in a subset (60-80%) of patients with NMO. These antibodies were subsequently shown to be directly involved in the pathogenesis of the condition. AQP4-Ab positive NMO is now considered an immunopathogenetically distinct disease in its own right. However, to date little is known about the cerebrospinal fluid (CSF) in AQP4-Ab positive NMO. Objective: To describe systematically the CSF profile of AQP4-Ab positive patients with NMO or its formes frustes, longitudinally extensive myelitis and optic neuritis. Material and methods: Cytological and protein biochemical results from 211 lumbar punctures in 89 AQP4-Ab positive patients of mostly Caucasian origin with neuromyelitis optica spectrum disorders (NMOSD) were analysed retrospectively. Results: CSF-restricted oligoclonal IgG bands, a hallmark of MS, were absent in most patients. If present, intrathecal IgG (and, more rarely, IgM) synthesis was low, transient, and, importantly, restricted to acute relapses. CSF pleocytosis was present in around 50% of samples, was mainly mild (median, 19 cells/μl; range 6-380), and frequently included neutrophils, eosinophils, activated lymphocytes, and/or plasma cells. Albumin CSF/serum ratios, total protein and CSF L-lactate levels correlated significantly with disease activity as well as with the length of the spinal cord lesions in patients with acute myelitis. CSF findings differed significantly between patients with acute myelitis and patients with acute optic neuritis at the time of LP. Pleocytosis and blood CSF barrier dysfunction were also present during remission in some patients, possibly indicating sustained subclinical disease activity. Conclusion: AQP4-Ab positive NMOSD is characterized by CSF features that are distinct from those in MS. Our findings are important for the differential diagnosis of MS and NMOSD and add to our understanding of the immunopathogenesis of this devastating condition. © 2011 Elsevier B.V. All rights reserved. Source

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