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https://www.readbyqxmd.com/read/28726484/annals-express-experience-with-newer-central-nervous-system-autoantibodies
#1
Abid Karim, Saiju Jacob
In the last decade, a large number of neuronal cell-surface antibodies have been described which are responsible for a range of neuroimmunological central nervous system disorders. Unlike the paraneoplastic antibodies which target intracellular antigens, these antibodies appear to be pathogenic and hence identification and prompt treatment can make a substantial impact on clinical outcomes of these patients. We review the common antibodies against the ionotropic Glutamate receptors (NMDAR, AMPAR), metabotropic Glutamate receptors (mGluR1 and mGluR5), voltage gated potassium channel-complex proteins (LGI1, CASPR2), and other antibodies targeted against Glycine receptor, Glutamic acid decarboxylase (GAD), Gamma Amino Butyric Acid B (GABAB), Dopamine-2-receptor (D2R) and Dipeptidyl-peptidase-like protein 6 (DPPX)...
January 1, 2017: Annals of Clinical Biochemistry
https://www.readbyqxmd.com/read/28710947/variations-in-biofilm-formation-desiccation-resistance-and-benzalkonium-chloride-susceptibility-among-listeria-monocytogenes-strains-isolated-in-canada
#2
Marta J Piercey, Timothy C Ells, Andrew J Macintosh, Lisbeth Truelstrup Hansen
Listeria monocytogenes is a pathogenic foodborne microorganism noted for its ability to survive in the environment and food processing facilities. Survival may be related to the phenotype of individual strains including the ability to form biofilms and resist desiccation and/or sanitizer exposure. The objectives of this research were to compare 14 L. monocytogenes strains isolated from blood (3), food (6) and water (5) with respect to their benzalkonium chloride (BAC) sensitivity, desiccation resistance, and ability to form biofilm...
July 8, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28675819/anti-neuronal-autoantibodies-in-both-drug-responsive-and-resistant-focal-seizures-with-unknown-cause
#3
Gokcen Gozubatik-Celik, Cigdem Ozkara, Canan Ulusoy, Aysegul Gunduz, Sakir Delil, Naz Yeni, Erdem Tuzun
BACKGROUND: and Objective Autoimmunity is an emerging field of research in the etiology of different neurological disorders including epilepsy. We aimed to investigate the presence of neuronal autoantibodies in focal epilepsy with unknown cause and their clinical correlates in both drug-responsive and resistant patients. METHOD: Between 2009 and 2010 94 patients were prospectively enrolled, had their antibodies tested and clinically followed." An additional 50 age- and gender-matched controls were also tested for antibodies...
June 17, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28673977/lgi1-tunes-intrinsic-excitability-by-regulating-the-density-of-axonal-kv1-channels
#4
Michael Seagar, Michael Russier, Olivier Caillard, Yves Maulet, Laure Fronzaroli-Molinieres, Marina De San Feliciano, Norah Boumedine-Guignon, Léa Rodriguez, Mickael Zbili, Fabrice Usseglio, Christine Formisano-Tréziny, Fahamoe Youssouf, Marion Sangiardi, Morgane Boillot, Stéphanie Baulac, María José Benitez, Juan-José Garrido, Dominique Debanne, Oussama El Far
Autosomal dominant epilepsy with auditory features results from mutations in leucine-rich glioma-inactivated 1 (LGI1), a soluble glycoprotein secreted by neurons. Animal models of LGI1 depletion display spontaneous seizures, however, the function of LGI1 and the mechanisms by which deficiency leads to epilepsy are unknown. We investigated the effects of pure recombinant LGI1 and genetic depletion on intrinsic excitability, in the absence of synaptic input, in hippocampal CA3 neurons, a classical focus for epileptogenesis...
July 3, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28670128/clinical-features-of-limbic-encephalitis-with-lgi1-antibody
#5
Meiling Wang, Xiaoyu Cao, Qingxin Liu, Wenbin Ma, Xiaoqian Guo, Xuewu Liu
OBJECTIVE: The objective of this study was to analyze the clinical manifestation, course, evolution, image manifestation, and treatments of LGI1 limbic encephalitis (LE). PATIENTS AND METHODS: Studies confirmed that LE with the complex antibody of voltage-gated potassium channels is LGI1 LE. Since then, LE cases have been reported. In this study, 10 typical LE cases were searched in PubMed. These cases and one additional case, which we reported herein, were retrospectively analyzed...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/28633043/de-novo-12q22-q23-3-duplication-associated-with-temporal-lobe-epilepsy
#6
Maria Stella Vari, Monica Traverso, Tommaso Bellini, Francesca Madia, Francesca Pinto, Carlo Minetti, Pasquale Striano, Federico Zara
PURPOSE: Temporal lobe epilepsy (TLE) is the most common form of focal epilepsy and may be associated with acquired central nervous system lesions or could be genetic. Various susceptibility genes and environmental factors are believed to be involved in the aetiology of TLE, which is considered to be a heterogeneous, polygenic, and complex disorder. Rare point mutations in LGI1, DEPDC5, and RELN as well as some copy number variations (CNVs) have been reported in families with TLE patients...
June 15, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28628235/expanded-phenotypes-and-outcomes-among-256-lgi1-caspr2-igg-positive-patients
#7
Avi Gadoth, Sean J Pittock, Divyanshu Dubey, Andrew McKeon, Jeff W Britton, John E Schmeling, Aurelia Smith, Amy L Kotsenas, Robert E Watson, Daniel H Lachance, Eoin P Flanagan, Vanda A Lennon, Christopher J Klein
OBJECTIVE: To describe an expanded phenotypic spectrum and longitudinal outcome in 256 LGI1-IgG or CASPR2-IgG seropositive patients. METHODS: Patients were identified through service neural autoantibody evaluation. Ninety-five had longitudinal follow-up (7-456 months; median 35). RESULTS: Among 3,910 patients tested, 196 were LGI1-IgG-positive; 51 were CASPR2-IgG-positive and 9 were dual-positive. CSF-testing was less sensitive than serum-testing, detecting only 24/38 LGI1-IgG-positive (63%) and 5/6 CASPR2-IgG-positive (83%)...
June 19, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28586706/lgi1-antibody-encephalitis-is-characterised-by-frequent-multifocal-clinical-and-subclinical-seizures
#8
Sidra Aurangzeb, Mkael Symmonds, Ravi K Knight, Robin Kennett, Tim Wehner, Sarosh R Irani
PURPOSE: To describe clinical and electrographic characteristics of seizures LGI1-antibody encephalitis, and their correlations with two-year outcomes. METHODS: Video-electroencephalography recordings were performed on a cohort of 16 consecutive patients with LGI1-antibodies from two UK neuroscience-centers over five-years. RESULTS: From 14 of 16 patients (13 males; age-range 53-92years), 86 faciobrachial dystonic seizures were recorded at a median frequency of 0...
May 30, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28566186/detection-of-lgi1-and-caspr2-antibodies-with-a-commercial-cell-based-assay-in-patients-with-very-high-vgkc-complex-antibody-levels
#9
T Yeo, Z Chen, J Y H Chai, K Tan
BACKGROUND: The presence of VGKC-complex antibodies, without LGI1/CASPR2 antibodies, as a standalone marker for neurological autoimmunity remains controversial. Additionally, the lack of an unequivocal VGKC-complex antibody cut-off level defining neurological autoimmunity makes it important to test for monospecific antibodies. We aim to determine the performance characteristics of a commercial assay (Euroimmun, Lübeck, Germany) for LGI1/CASPR2 antibody detection in patients with very high VGKC-complex antibody levels and report their clinico-serological associations...
July 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28544133/autoimmune-encephalitis-associated-with-voltage-gated-potassium-channels-complex-and-leucine-rich-glioma-inactivated-1-antibodies-a-national-cohort-study
#10
M Celicanin, M Blaabjerg, C Maersk-Moller, S Beniczky, L Marner, C Thomsen, F W Bach, D Kondziella, H Andersen, F Somnier, Z Illes, L H Pinborg
BACKGROUND AND PURPOSE: The aim of this study was to describe clinical and paraclinical characteristics of all Danish patients who tested positive for anti-voltage-gated potassium channels (VGKC)-complex, anti-leucine-rich glioma-inactivated 1 (LGI1) and anti-contactin-associated protein-2 antibodies in the serum/cerebrospinal fluid between 2009 and 2013 with follow-up interviews in 2015 and 2016. METHODS: We evaluated antibody status, symptoms leading to testing, course of disease, suspected diagnosis and time of admission as well as diagnosis and treatment...
August 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28482428/-clinical-analysis-of-9-cases-with-anti-leucine-rich-glioma-inactivated-1-protein-antibody-associated-limbic-encephalitis
#11
Y X Zhang, H L Yang, Y Y Wu, C C Wang, X Y Gao, Y Y Shi, H Q Liu, Y Huang, J W Zhang
Objective: This study was to describe the clinical characteristics of Anti-leucine-rich glioma inactivated 1 protein(LGI1) antibody associated limbic encephalitis. Methods: Clinical data including clinical features, laboratory and radiological findings, treatment and prognosis of the 9 patients were analyzed. Results: In all 9 cases, 6 cases experienced epileptic seizure, 5 cases had psychosis, 7 cases presented with memory impairment, 4 cases showed faciobrachial dystonic seizure, 2 had refractory hyponatremia...
May 9, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28476644/autoantibody-mediated-diseases-of-the-cns-structure-dysfunction-and-therapy
#12
REVIEW
James Varley, Jennifer Taylor, Sarosh R Irani
The field of neuronal autoantibody associated diseases of the central nervous system has expanded dramatically in the last few years. The range of identified neuronal and glial antibody targets has led to the accurate classification of a number of syndromes which each associate with characteristic clinical features. These diseases are especially important due to their frequent response to immunotherapies. Antibodies against the N-methyl, d-aspartate receptor (NMDAR) and leucine-rich glioma inactivated 1 (LGI1) are the commonest autoantibodies known in patients with autoimmune forms of encephalitis...
May 3, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28473998/ivig-treatment-for-repeated-hypothermic-attacks-associated-with-lgi1-antibody-encephalitis
#13
Yuichi Hayashi, Megumi Yamada, Akio Kimura, Takashi Inuzuka
No abstract text is available yet for this article.
July 2017: Neurology® Neuroimmunology & Neuroinflammation
https://www.readbyqxmd.com/read/28432047/delayed-lgi1-seropositivity-in-voltage-gated-potassium-channel-vgkc-complex-antibody-limbic-encephalitis
#14
Michael Sweeney, Jonathan Galli, Scott McNally, Anne Tebo, Thomas Haven, Perla Thulin, Stacey L Clardy
We utilise a clinical case to highlight why exclusion of voltage-gated potassium channel (VGKC)-complex autoantibody testing in serological evaluation of patients may delay or miss the diagnosis. A 68-year-old man presented with increasing involuntary movements consistent with faciobrachial dystonic seizures (FBDS). Initial evaluation demonstrated VGKC antibody seropositivity with leucine-rich glioma-inactivated 1 (LGI1) and contactin-associated protein-like 2 (CASPR2) seronegativity. Aggressive immunotherapy with methylprednisolone and plasmapheresis was started early in the course of his presentation...
April 20, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28431605/global-brain-atrophy-and-metabolic-dysfunction-in-lgi1-encephalitis-a-prospective-multimodal-mri-study
#15
Monika Szots, Morten Blaabjerg, Gergely Orsi, Pernille Iversen, Daniel Kondziella, Camilla G Madsen, Ellen Garde, Peter O Magnusson, Peter Barsi, Ferenc Nagy, Hartwig R Siebner, Zsolt Illes
BACKGROUND: Chronic cognitive deficits are frequent in leucin-rich glioma-inactivated 1 protein (LGI1) encephalitis. We examined structural and metabolic brain abnormalities following LGI1 encephalitis and correlated findings with acute and follow-up clinical outcomes. METHODS: Nine patients underwent prospective multimodal 3 Tesla MRI 33.1±18months after disease onset, including automated volumetry, diffusion tensor imaging (DTI) and magnetic resonance spectroscopy (MRS)...
May 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28418022/the-value-of-lgi1-caspr2-and-voltage-gated-potassium-channel-antibodies-in-encephalitis
#16
REVIEW
Agnes van Sonderen, Mar Petit-Pedrol, Josep Dalmau, Maarten J Titulaer
The discovery, in 2010, of autoantibodies against the extracellular proteins LGI1 and Caspr2 facilitated a change of view regarding the clinical importance of voltage-gated potassium channel (VGKC) antibodies. Currently, these antibodies are all classified as VGKC-complex antibodies, and are commonly considered to have a similar clinical value. However, studies from the past few years show that the immune responses mediated by these antibodies have differing clinical relevance. Here, we review the clinical importance of these immune responses in three settings: patients with anti-LGI1 antibodies, patients with anti-Caspr2 antibodies, and patients with antibodies against the VGKC complex that lack LGI1 and Caspr2 specificity...
April 18, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/28369215/focal-ca3-hippocampal-subfield-atrophy-following-lgi1-vgkc-complex-antibody-limbic-encephalitis
#17
Thomas D Miller, Trevor T-J Chong, Anne M Aimola Davies, Tammy W C Ng, Michael R Johnson, Sarosh R Irani, Angela Vincent, Masud Husain, Saiju Jacob, Paul Maddison, Christopher Kennard, Penny A Gowland, Clive R Rosenthal
Magnetic resonance imaging has linked chronic voltage-gated potassium channel (VGKC) complex antibody-mediated limbic encephalitis with generalized hippocampal atrophy. However, autoantibodies bind to specific rodent hippocampal subfields. Here, human hippocampal subfield (subiculum, cornu ammonis 1-3, and dentate gyrus) targets of immunomodulation-treated LGI1 VGKC-complex antibody-mediated limbic encephalitis were investigated using in vivo ultra-high resolution (0.39 × 0.39 × 1.0 mm3) 7.0 T magnetic resonance imaging [n = 18 patients, 17 patients (94%) positive for LGI1 antibody and one patient negative for LGI1/CASPR2 but positive for VGKC-complex antibodies, mean age: 64...
March 28, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28363946/emergence-of-new-onset-psychotic-disorder-following-recovery-from-lgi1-antibody-associated-limbic-encephalitis
#18
Thomas A Pollak, Nick Moran
Neuronal autoantibodies targeting cell surface antigens have been described in association with autoimmune encephalitides which frequently feature psychosis and other psychiatric disturbances alongside neurological signs and symptoms. Little has been written however about the long-term psychiatric status of individuals following recovery from the acute phase of autoimmune encephalitis, despite case series and anecdotal evidence suggesting this may be a cause of considerable disability. Here, we describe a man aged 58 years with no psychiatric history who developed a severe and acute psychotic disorder following resolution of a protracted course of limbic encephalitis associated with antibodies to leucine-rich glioma inactivated 1 protein...
March 31, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28341002/seroprevalence-survey-of-selective-anti-neuronal-autoantibodies-in-patients-with-first-episode-schizophrenia-and-chronic-schizophrenia
#19
Chia-Hsiang Chen, Min-Chih Cheng, Chih-Min Liu, Chen-Chung Liu, Ko-Huan Lin, Hai-Gwo Hwu
Autoimmune encephalopathy caused by autoantibodies against neuronal cell-surface proteins in the brain is a newly discovered disease category associated with psychiatric disorders. Correct diagnosis of this condition relies on the detection of specific autoantibodies in the blood or cerebral spinal fluid in addition to the clinical presentations. The study aimed to understand the seroprevalence of selective anti-neuronal autoantibodies in our patients with schizophrenia. First, we screened for six anti-neuronal autoantibodies in an archived blood sample collected from patients with the first-episode schizophrenia...
March 21, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28331893/striking-basal-ganglia-imaging-abnormalities-in-lgi1-ab-faciobrachial-dystonic-seizures
#20
A Sebastian López Chiriboga, Jason L Siegel, William O Tatum, Jerry J Shih, Eoin P Flanagan
No abstract text is available yet for this article.
May 2017: Neurology® Neuroimmunology & Neuroinflammation
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