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Anti-M-methyl-D-aspartate receptor

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https://www.readbyqxmd.com/read/28418206/anti-nmda-receptor-encephalitis-during-pregnancy-a-case-report-and-literature-review
#1
Xue Xiao, Shunping Gui, Peng Bai, Yi Bai, Dan Shan, Yayi Hu, Tri M Bui-Nguyen, Rong Zhou
Anti-N-methyl-d-aspartate receptor (anti-NMDA-R) encephalitis is an autoimmune disorder that was first described by Dr Vitaliani in 2005. In 2007, Dalmau et al. found anti-NMDA-R antibody expressed both in the hippocampus and prefrontal nerve cell membrane, finally proposing the diagnosis of autoimmune anti-NMDA-R encephalitis. Most of the patients are female (91%), with ages ranging from 4 to 76 years. The average age is 23 years, a birth peak age, although anti-NMDA-R encephalitis is rare during pregnancy...
April 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28394968/-autoimmune-encephalitis-induced-by-antibodies-against-gaba-a-receptor
#2
Pablo González R, Lorena Hudson A, Esteban Basáez M, Marcelo Miranda C
Among autoimmune encephalitides, a prevalent group are those associated with antibodies against the N-Methyl-D-aspartate receptor, which present with behavior abnormalities, psychosis, seizures and abnormal movements. A new variant, mediated by antibodies against the GABA-A receptor, was recen-tly described. We report a 66-years-old female with this form of encephalitis whose main manifestation was the presence of severe seizures leading to status epilepticus. The patient had a good response to immunomodulatory therapy with intravenous methylprednisolone, azathioprine and anticonvulsants...
November 2016: Revista Médica de Chile
https://www.readbyqxmd.com/read/28359934/cxcl13-regulates-the-trafficking-of-glun2b-containing-nmda-receptor-via-il-17-in-the-development-of-remifentanil-induced-hyperalgesia-in-rats
#3
M Zhu, S T Yuan, W L Yu, L L Jia, Y Sun
BACKGROUND: This study aimed to investigate whether CXCL13 modulated the trafficking of NMDA receptor via interleukin (IL)-17 in a rat model of remifentanil-induced hyperalgesia (RIH).Although chemokines are crucial regulators of neuroinflammation, spinal N-methyl-d-aspartate (NMDA) receptor activation, and development of hypernociceptive process, little is known about specific pathogenesis and effective treatment. Inflammatory mediators are required for excitatory synaptic transmission in pathologic pain...
March 28, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28277064/inhibition-of-nmda-receptor-function-with-an-anti-glun1-s2-antibody-impairs-human-platelet-function-and-thrombosis
#4
Taryn N Green, Justin R Hamilton, Marie-Christine Morel-Kopp, Zhaohua Zheng, Ting-Yu T Chen, James I Hearn, Peng P Sun, Jack U Flanagan, Deborah Young, P Alan Barber, Matthew J During, Christopher M Ward, Maggie L Kalev-Zylinska
GluN1 is a mandatory component of N-methyl-D-aspartate receptors (NMDARs) best known for their roles in the brain, but with increasing evidence for relevance in peripheral tissues, including platelets. Certain anti-GluN1 antibodies reduce brain infarcts in rodent models of ischaemic stroke. There is also evidence that human anti-GluN1 autoantibodies reduce neuronal damage in stroke patients, but the underlying mechanism is unclear. This study investigated whether anti-GluN1-mediated neuroprotection involves inhibition of platelet function...
February 21, 2017: Platelets
https://www.readbyqxmd.com/read/28259863/-review-of-the-psychiatric-aspects-of-anti-nmda-n-methyl-d-aspartic-acid-receptor-encephalitis-case-report-and-our-plans-for-a-future-study
#5
Levente Herman, Ildiko Reka Zsigmond, Laszlo Peter, Janos M Rethelyi
Anti-NMDAR (N-methyl-D-aspartic acid receptor) encephalitis, first described in 2007, is a rare, autoimmune limbic encephalitis. In half of the cases anti-NMDAR antibodies are paraneoplastic manifestations of an underlying tumor (mostly ovarian teratoma). In the early stage of the disease psychiatric symptoms are prominent, therefore 60-70% of the patients are first treated in a psychiatric department. In most of the cases, typical neurological symptoms appear later. Besides the clinical picture and typical symptoms, verifying presence of IgG antibodies in the serum or CSF is necessary to set up the diagnosis...
December 2016: Neuropsychopharmacologia Hungarica
https://www.readbyqxmd.com/read/28186680/the-group-ii-metabotropic-glutamate-receptor-agonist-ly354740-and-the-d2-receptor-antagonist-haloperidol-reduce-locomotor-hyperactivity-but-fail-to-rescue-spatial-working-memory-in-glua1-knockout-mice
#6
Thomas Boerner, Alexei M Bygrave, Jingkai Chen, Anushka Fernando, Stephanie Jackson, Chris Barkus, Rolf Sprengel, Peter H Seeburg, Paul J Harrison, Gary Gilmour, David M Bannerman, David J Sanderson
Group II metabotropic glutamate receptor agonists have been suggested as potential anti-psychotics, at least in part, based on the observation that the agonist LY354740 appeared to rescue the cognitive deficits caused by non-competitive N-methyl-d-aspartate receptor (NMDAR) antagonists, including spatial working memory deficits in rodents. Here, we tested the ability of LY354740 to rescue spatial working memory performance in mice that lack the GluA1 subunit of the AMPA glutamate receptor, encoded by Gria1, a gene recently implicated in schizophrenia by genome-wide association studies...
April 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28028820/risk-factors-for-mortality-in-patients-with-anti-nmda-receptor-encephalitis
#7
X Chi, W Wang, C Huang, M Wu, L Zhang, J Li, D Zhou
OBJECTIVE: Anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis is a severe autoimmune disorder with a mortality of 5%-7%, but few studies have focused on the predictors of death in this disease. In this study, we aim to investigate predictors and causes of death in patients with anti-NMDAR encephalitis. METHODS: In this cohort study, patients with anti-NMDAR encephalitis were enrolled at the West China Hospital of Sichuan University between June 2011 and October 2015...
December 27, 2016: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/28017557/epileptic-phenotypes-electroclinical-features-and-clinical-characteristics-in-17-children-with-anti-nmdar-encephalitis
#8
E Haberlandt, M Ensslen, U Gruber-Sedlmayr, B Plecko, M Brunner-Krainz, M Schimmel, S Schubert-Bast, U Neirich, H Philippi, G Kurleman, M Tardieu, G Wohlrab, I Borggraefe, K Rostásy
BACKGROUND: Anti-N-methyl d-aspartate receptor (NMDAR) encephalitis is a rare disorder characterized by seizures, neuropsychiatric symptoms, dyskinesia and autonomic instability. OBJECTIVE: Aim of the present study was to evaluate the seizure phenotypes and electroencephalogram (EEG) features in children with anti-NMDAR encephalitis. METHODS: Seizure types, electroclinical features and clinical characteristics of 17 children with anti-NMDAR encephalitis were analysed in a retrospective case series from nine centres in Europe...
May 2017: European Journal of Paediatric Neurology: EJPN
https://www.readbyqxmd.com/read/27796746/a-neuroprotective-effect-of-the-glutamate-receptor-antagonist-mk801-on-long-term-cognitive-and-behavioral-outcomes-secondary-to-experimental-cerebral-malaria
#9
Aline Silva de Miranda, Fátima Brant, Luciene Bruno Vieira, Natália Pessoa Rocha, Érica Leandro Marciano Vieira, Gustavo Henrique Souza Rezende, Pollyana Maria de Oliveira Pimentel, Marcio F D Moraes, Fabíola Mara Ribeiro, Richard M Ransohoff, Mauro Martins Teixeira, Fabiana Simão Machado, Milene Alvarenga Rachid, Antônio Lúcio Teixeira
Cerebral malaria (CM) is a life-threatening complication of Plasmodium falciparum infection, which can result in long-term cognitive and behavioral deficits despite successful anti-malarial therapy. Due to the substantial social and economic burden of CM, the development of adjuvant therapies is a scientific goal of highest priority. Apart from vascular and immune responses, changes in glutamate system have been reported in CM pathogenesis suggesting a potential therapeutic target. Based on that, we hypothesized that interventions in the glutamatergic system induced by blockage of N-methyl-D-aspartate (NMDA) receptors could attenuate experimental CM long-term cognitive and behavioral outcomes...
October 28, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27776544/anti-n-methyl-d-aspartate-receptor-encephalitis-with-an-imaging-invisible-ovarian-teratoma-a-case-report
#10
Zainab M Abdul-Rahman, Peter K Panegyres, Margareta Roeck, David Hawkins, Jude Bharath, Paul Grolman, Cliffe Neppe, David Palmer
BACKGROUND: Anti-N-methyl-D-aspartate receptor encephalitis is a recently discovered disease entity of paraneoplastic limbic encephalitis. It largely affects young women and is often associated with an ovarian teratoma. It is a serious yet treatable condition if diagnosed early. Its remedy involves immunotherapy and surgical removal of the teratoma of the ovaries. This case of anti-N-methyl-D-aspartate receptor encephalitis involves an early surgical intervention with bilateral oophorectomy, despite negative imaging evidence of a teratoma...
October 24, 2016: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/27708781/psychosis-call-a-surgeon-a-rare-etiology-of-psychosis-requiring-resection
#11
Kantha Medepalli, Cody M Lee, Lauryn A Benninger, Jean M Elwing
OBJECTIVE: Anti-N-methyl-d-aspartate receptor encephalitis is a rare but emerging cause of autoimmune encephalitis. Our objective is to present a case of this rare disease while highlighting the importance of an aggressive search for underlying malignancy as well as the common mischaracterization of primary psychiatric illness that occurs in these patients. METHODS: A young Caucasian female with no known psychiatric history presented with acute onset of seizures and psychosis...
2016: SAGE open medical case reports
https://www.readbyqxmd.com/read/27655295/zebrafish-is-a-predictive-model-for-identifying-compounds-that-protect-against-brain-toxicity-in-severe-acute-organophosphorus-intoxication
#12
Melissa Faria, Eva Prats, Francesc Padrós, Amadeu M V M Soares, Demetrio Raldúa
Acute organophosphorus (OP) intoxication is a worldwide clinical and public health problem. In addition to cholinergic crisis, neurodegeneration and brain damage are hallmarks of the severe form of this toxidrome. Recently, we generated a chemical model of severe acute OP intoxication in zebrafish that is characterized by altered head morphology and brain degeneration. The pathophysiological pathways resulting in brain toxicity in this model are similar to those described in humans. The aim of this study was to assess the predictive power of this zebrafish model by testing the effect of a panel of drugs that provide protection in mammalian models...
April 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/27610299/successful-management-of-dexmedetomidine-for-postoperative-intensive-care-sedation-in-a-patient-with-anti-nmda-receptor-encephalitis-a-case-report-and-animal-experiment
#13
Daiki Yamanaka, Takashi Kawano, Hiroki Tateiwa, Hideki Iwata, Fabricio M Locatelli, Masataka Yokoyama
BACKGROUND: Anti-N-methyl-d-aspartate receptor (NMDA-R) encephalitis is a recently identified but increasingly recognized autoimmune paraneoplastic disease. Because these patients present complex neuropsychiatric symptoms due to NMDA-R dysfunction, the optimal methods of sedation/anesthesia remain controversial. Here, we present animal experiment data, along with a related case report, implying the safe and effective use of dexmedetomidine in patients with anti-NMDA-R encephalitis. FINDINGS: (1) Animal experiment: in order to investigate whether dexmedetomidine may interfere with NMDA-R activity, an NMDA antagonist (MK-801) model in rats was used to simulate anti-NMDA-R encephalitis...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27609625/prevalence-of-serum-anti-neuronal-autoantibodies-in-patients-admitted-to-acute-psychiatric-care
#14
M Schou, S G Sæther, K Borowski, B Teegen, D Kondziella, W Stoecker, A Vaaler, S K Reitan
BACKGROUND: Autoimmune encephalitis associated with anti-neuronal antibodies may be challenging to distinguish from primary psychiatric disorders. The significance of anti-neuronal antibodies in psychiatric patients without clear evidence of autoimmune encephalitis is unknown. We investigated the serum prevalence of six anti-neuronal autoantibodies in a cohort of unselected patients admitted to acute psychiatric care. METHOD: Serum was drawn from 925 patients admitted to acute psychiatric in-patient care...
December 2016: Psychological Medicine
https://www.readbyqxmd.com/read/27546201/cognitive-and-social-functioning-deficits-after-anti-n-methyl-d-aspartate-receptor-encephalitis-an-exploratory-case-series
#15
Gemma L McKeon, James G Scott, Donna M Spooner, Alexander E Ryan, Stefan Blum, David Gillis, Daman Langguth, Gail A Robinson
BACKGROUND: Anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis is a recently described life-threatening autoimmune disorder associated with a characteristic multi-stage neuropsychiatric syndrome. Although it is known that the majority of patients experience neuropsychological disturbance post-treatment, some aspects of the cognitive profile remain unclear. METHODS: This study sought to investigate patterns of cognitive functioning in a sample of anti-NMDAR encephalitis patients...
September 2016: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/27521622/etiological-associations-and-outcome-predictors-of-acute-electroencephalography-in-childhood-encephalitis
#16
Shekeeb S Mohammad, Samantha M Soe, Sekhar C Pillai, Margherita Nosadini, Elizabeth H Barnes, Deepak Gill, Russell C Dale
OBJECTIVES: To examine EEG features in a retrospective 13-year cohort of children with encephalitis. METHODS: 354 EEGs from 119 patients during their admission were rated blind using a proforma with demonstrated inter-rater reliability (mean k=0.78). Patients belonged to 12 etiological groups that could be grouped into infectious and infection-associated (n=47), immune-mediated (n=36) and unknown (n=33). EEG features were analyzed between groups and for risk of abnormal Liverpool Outcome Score and drug resistant epilepsy (DRE) at last follow up...
October 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/27502473/all-naturally-occurring-autoantibodies-against-the-nmda-receptor-subunit-nr1-have-pathogenic-potential-irrespective-of-epitope-and-immunoglobulin-class
#17
E Castillo-Gómez, B Oliveira, D Tapken, S Bertrand, C Klein-Schmidt, H Pan, P Zafeiriou, J Steiner, B Jurek, R Trippe, H Prüss, W-H Zimmermann, D Bertrand, H Ehrenreich, M Hollmann
Autoantibodies of the IgG class against N-methyl-d-aspartate-receptor subunit NR1 (NMDAR1) were first described in anti-NMDAR encephalitis and seen as disease indicators. Recent work on together over 5000 individuals challenged this exclusive view by showing age-dependently up to >20% NMDAR1-autoantibody seroprevalence with comparable immunoglobulin class and titer distribution across health and disease. The key question therefore is to understand the properties of these autoantibodies, also in healthy carriers, in order to assess secondary complications and possible contributions to neuropsychiatric disease...
August 9, 2016: Molecular Psychiatry
https://www.readbyqxmd.com/read/27412741/-clinical-and-electroencephalographic-analysis-of-anti-n-methyl-d-aspartate-receptor-encephalitis-in-children
#18
H Li, X H Wang, F Fang, C H Ding, J L Lyu, C H Chen, T L Han, Y Wu, W H Zhang, J W Li, H M Wang, X Y Yang, S Zhang, J Deng, S Gong, X Sun, L F Dai
OBJECTIVE: To study the clinical and electroencephalographic (EEG) characteristics of anti-N-methyl-D-aspartate receptor encephalitis (anti-NMDAR encephalitis) in children. METHOD: Retrospective analysis was performed on the clinical and EEG data of 105 patients with anti-NMDAR encephalitis treated in Beijing Children's Hospital (August 2011-March 2015). Of the 105 patients, 38 were male and 67 were female.The age of onset was from 6 months and 26 days to 15 years and 8 months (average (8±4)years)...
July 2016: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/27329512/auto-immune-anti-n-methyl-d-aspartate-receptor-anti-nmdar-encephalitis-three-case-reports
#19
Fahad A Bashiri, Abdulrahman A Al-Rasheed, Saeed M Hassan, Muddathir H A Hamad, Heba Y El Khashab, Amal Y Kentab, Fahad B AlBadr, Mustafa A Salih
Anti-N-methyl-D-aspartate receptor (anti-NMDAR) encephalitis is a recently identified auto-immune disorder characterised by severe memory deficit, a decreased level of consciousness, seizures, autonomic dysfunction and movement disorders. Three girls with the disorder are reported; they were aged 4 years, 5 years and 10 months. The 10-month-old infant who is one of the youngest patients reported with anti-NMDAR encephalitis worldwide, had MRI features suggestive of herpes simplex encephalitis (known to trigger anti-NMDAR encephalitis), but CSF PCR for herpes simplex was negative...
June 22, 2016: Paediatrics and International Child Health
https://www.readbyqxmd.com/read/27295461/electroconvulsive-therapy-in-anti-n-methyl-d-aspartate-receptor-encephalitis-a-case-report-and-review-of-the-literature
#20
M Justin Coffey, Joseph J Cooper
OBJECTIVES: There is a growing scientific literature describing the neuropsychiatric symptoms of anti-N-methyl-D-aspartate (NMDA) receptor encephalitis, including the use of electroconvulsive therapy (ECT) to treat those symptoms. We sought to consolidate this literature into a review that highlights its relevance to ECT practitioners. METHODS: We performed a PubMed search using the terms electroconvulsive therapy and encephalitis, autoimmune encephalitis, or anti-NMDA receptor encephalitis...
December 2016: Journal of ECT
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