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https://www.readbyqxmd.com/read/28222587/contactin-1-a-promising-progression-biomarker-and-therapeutic-target-of-carcinoma
#1
Ruijie Zhang, Lihua Xie, Chun Liu, Honghui Yang, Hua Lin, Qiang Zhang, Wenxiang Tang, Fuyun Ji, Shenghua Sun
No abstract text is available yet for this article.
April 2017: Minerva Medica
https://www.readbyqxmd.com/read/28135886/contactin-2-tag-1-active-on-the-front-line-for-three-decades
#2
Tomoyuki Masuda
Contactin-2/transiently expressed axonal surface glycoprotein-1 (TAG-1) is a cell adhesion molecule belonging to the immunoglobulin superfamily (IgSF). It has six immunoglobulin-like extracellular domains and four fibronectin III-like ones, with anchoring to the cell membrane through glycosylphosphatidyl inositol. Contactin-2/TAG-1 is expressed in specific neurons transiently on the axonal surface during the fetal period. In postnatal stages, Contactin-2/TAG-1 is expressed in cerebellar granule cells, hippocampal pyramidal cells, and the juxtaparanodal regions of myelinated nerve fibers...
January 31, 2017: Cell Adhesion & Migration
https://www.readbyqxmd.com/read/28115996/genotype-and-sex-dependent-effects-of-altered-cntnap2-expression-on-the-function-of-visual-cortical-areas
#3
Leah B Townsend, Spencer L Smith
BACKGROUND: Autism spectrum disorder (ASD) is a heritable, heterogeneous neurodevelopmental disorder that is four times more likely to affect males than females. Despite this overt sex bias, it is unclear how genetic mutations associated with ASD alter cortical circuitry to produce the behavioral phenotypes by which ASD is diagnosed. Contactin-associated protein-like 2 (CNTNAP2) is an ASD-associated gene, and while Cntnap2 knockout (KO) mice recapitulate many of the features of ASD, the effect on cortical circuitry is poorly understood...
2017: Journal of Neurodevelopmental Disorders
https://www.readbyqxmd.com/read/28115688/sex-specific-gene-environment-interactions-underlying-asd-like-behaviors
#4
Sara M Schaafsma, Khatuna Gagnidze, Anny Reyes, Natalie Norstedt, Karl Månsson, Kerel Francis, Donald W Pfaff
The male bias in the incidence of autism spectrum disorders (ASDs) is one of the most notable characteristics of this group of neurodevelopmental disorders. The etiology of this sex bias is far from known, but pivotal for understanding the etiology of ASDs in general. Here we investigate whether a "three-hit" (genetic load × environmental factor × sex) theory of autism may help explain the male predominance. We found that LPS-induced maternal immune activation caused male-specific deficits in certain social responses in the contactin-associated protein-like 2 (Cntnap2) mouse model for ASD...
February 7, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28115470/intracellular-and-non-neuronal-targets-of-voltage-gated-potassium-channel-complex-antibodies
#5
Bethan Lang, Mateusz Makuch, Teresa Moloney, Inga Dettmann, Swantje Mindorf, Christian Probst, Winfried Stoecker, Camilla Buckley, Charles R Newton, M Isabel Leite, Paul Maddison, Lars Komorowski, Jane Adcock, Angela Vincent, Patrick Waters, Sarosh R Irani
OBJECTIVES: Autoantibodies against the extracellular domains of the voltage-gated potassium channel (VGKC) complex proteins, leucine-rich glioma-inactivated 1 (LGI1) and contactin-associated protein-2 (CASPR2), are found in patients with limbic encephalitis, faciobrachial dystonic seizures, Morvan's syndrome and neuromyotonia. However, in routine testing, VGKC complex antibodies without LGI1 or CASPR2 reactivities (double-negative) are more common than LGI1 or CASPR2 specificities. Therefore, the target(s) and clinical associations of double-negative antibodies need to be determined...
January 23, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28105002/erratum-association-of-cell-adhesion-molecules-contactin-6-and-latrophilin-1-regulates-neuronal-apoptosis
#6
(no author information available yet)
[This corrects the article on p. 143 in vol. 9, PMID: 28018171.].
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28074486/introduction-of-steered-molecular-dynamics-into-unres-coarse-grained-simulations-package
#7
Adam K Sieradzan, Rafał Jakubowski
In this article, an implementation of steered molecular dynamics (SMD) in coarse-grain UNited RESidue (UNRES) simulations package is presented. Two variants of SMD have been implemented: with a constant force and a constant velocity. The huge advantage of SMD implementation in the UNRES force field is that it allows to pull with the speed significantly lower than the accessible pulling speed in simulations with all-atom representation of a system, with respect to a reasonable computational time. Therefore, obtaining pulling speed closer to those which appear in the atomic force spectroscopy is possible...
January 11, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28064060/a-current-view-on-contactin-4-5-and-6-implications-in-neurodevelopmental-disorders
#8
REVIEW
Oguro-Ando Asami, Amila Zuko, Kristel T E Kleijer, J Peter H Burbach
Contactins (Cntns) are a six-member subgroup of the immunoglobulin cell adhesion molecule superfamily (IgCAMs) with pronounced brain expression and function. Recent genetic studies of neuropsychiatric disorders have pinpointed contactin-4 (CNTN4), contactin-5 (CNTN5) and contactin-6 (CNTN6) as candidate genes in neurodevelopmental disorders, particularly in autism spectrum disorders (ASDs), but also in intellectual disability, schizophrenia (SCZ), attention-deficit hyperactivity disorder (ADHD), bipolar disorder (BD), alcohol use disorder (AUD) and anorexia nervosa (AN)...
January 4, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/28043063/investigation-of-neuronal-auto-antibodies-in-systemic-lupus-erythematosus-patients-with-epilepsy
#9
Zerrin Karaaslan, Esme Ekizoğlu, Pınar Tektürk, Ece Erdağ, Erdem Tüzün, Nerses Bebek, Candan Gürses, Betül Baykan
PURPOSE: Epilepsy is an important feature for neuropsychiatric involvement in systemic lupus erythematosus (SLE) with unknown mechanism. Our aim was to investigate the presence of neuronal auto-antibodies (NAbs) in neuropsychiatric SLE (NPSLE). METHODS: Eighteen SLE patients (17 females, 1 male) experiencing recurrent seizures were enrolled to this study. Their clinical characteristics, EEG and MRI findings and follow-up information were evaluated from their files...
December 14, 2016: Epilepsy Research
https://www.readbyqxmd.com/read/28038945/role-of-the-adhesion-molecule-f3-contactin-in-synaptic-plasticity-and-memory
#10
REVIEW
Walter Gulisano, Antonella Bizzoca, Gianfranco Gennarini, Agostino Palmeri, Daniela Puzzo
Cell adhesion molecules (CAMs) have a pivotal role in building and maintaining synaptic structures during brain development participating in axonal elongation and pathfinding, glial guidance of neuronal migration, as well as myelination. CAMs expression persists in the adult brain particularly in structures undergoing postnatal neurogenesis and involved in synaptic plasticity and memory as the hippocampus. Among the neural CAMs, we have recently focused on F3/Contactin, a glycosylphosphatidyl inositol-anchored glycoprotein belonging to the immunoglobulin superfamily, involved in neuronal development, synaptic maintenance and organization of neuronal networks...
December 28, 2016: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/28025742/loss-of-function-of-ptpr-%C3%AE-and-%C3%AE-observed-in-sporadic-schizophrenia-causes-brain-region-specific-deregulation-of-monoamine-levels-and-altered-behavior-in-mice
#11
Arnaud Cressant, Veronique Dubreuil, Jing Kong, Thorsten Manfred Kranz, Francoise Lazarini, Jean-Marie Launay, Jacques Callebert, Jan Sap, Dolores Malaspina, Sylvie Granon, Sheila Harroch
RATIONALE: The receptor protein tyrosine phosphatase PTPRG has been genetically associated with psychiatric disorders and is a ligand for members of the contactin family, which are themselves linked to autism spectrum disorders. OBJECTIVE: Based on our finding of a phosphatase-null de novo mutation in PTPRG associated with a case of sporadic schizophrenia, we used PTPRG knockout (KO) mice to model the effect of a loss-of-function mutation. We compared the results with loss-of-function in its close paralogue PTPRZ, previously associated with schizophrenia...
December 26, 2016: Psychopharmacology
https://www.readbyqxmd.com/read/28018171/association-of-cell-adhesion-molecules-contactin-6-and-latrophilin-1-regulates-neuronal-apoptosis
#12
Amila Zuko, Asami Oguro-Ando, Harm Post, Renske L R E Taggenbrock, Roland E van Dijk, A F Maarten Altelaar, Albert J R Heck, Alexander G Petrenko, Bert van der Zwaag, Yasushi Shimoda, R J Pasterkamp, J P H Burbach
In view of important neurobiological functions of the cell adhesion molecule contactin-6 (Cntn6) that have emerged from studies on null-mutant mice and autism spectrum disorders patients, we set out to examine pathways underlying functions of Cntn6 using a proteomics approach. We identified the cell adhesion GPCR latrophilin-1 (Lphn1, a.k.a. CIRL1/CL, ADGRL1) as a binding partner for Cntn6 forming together a heteromeric cis-complex. Lphn1 expression in cultured neurons caused reduction in neurite outgrowth and increase in apoptosis, which was rescued by coexpression of Cntn6...
2016: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28009770/fatal-morvan-syndrome-associated-with-myasthenia-gravis
#13
Madhu Nagappa, Anita Mahadevan, Sanjib Sinha, Parayil S Bindu, Pavagada S Mathuranath, Cheminikara Bineesh, Rose D Bharath, Arun B Taly
INTRODUCTION: Morvan syndrome is a rare and complex autoimmune disorder affecting multiple sites of neuraxis. CASE REPORT: We present fulminant Morvan syndrome, developing on a background of chronic myasthenia gravis. A 54-year-old gentleman presented with fluctuating ophthalmoplegia and proximal muscles weakness of 7 years duration that remitted with pyridostigmine and prednisolone. He developed insomnia of 2 months duration, worsening of myasthenic symptoms and respiratory distress, dysautonomia, encephalopathy, and peripheral nerve hyperexcitability...
January 2017: Neurologist
https://www.readbyqxmd.com/read/27995817/psychophysiological-endophenotypes-to-characterize-mechanisms-of-known-schizophrenia-genetic-loci
#14
M Liu, S M Malone, U Vaidyanathan, M C Keller, G Abecasis, M McGue, W G Iacono, S I Vrieze
BACKGROUND: Endophenotypes are laboratory-based measures hypothesized to lie in the causal chain between genes and clinical disorder, and to serve as a more powerful way to identify genes associated with the disorder. One promise of endophenotypes is that they may assist in elucidating the neurobehavioral mechanisms by which an associated genetic polymorphism affects disorder risk in complex traits. We evaluated this promise by testing the extent to which variants discovered to be associated with schizophrenia through large-scale meta-analysis show associations with psychophysiological endophenotypes...
December 20, 2016: Psychological Medicine
https://www.readbyqxmd.com/read/27986399/paranodal-lesions-in-chronic-inflammatory-demyelinating-polyneuropathy-associated-with-anti-neurofascin-155-antibodies
#15
Jean-Michel Vallat, Nobuhiro Yuki, Kenji Sekiguchi, Norito Kokubun, Nobuyuki Oka, Stéphane Mathis, Laurent Magy, Diane L Sherman, Peter J Brophy, Jérôme J Devaux
Antibodies to Contactin-1 and Neurofascin 155 (Nfasc155) have recently been associated with subsets of patients with chronic inflammatory demyelinating polyneuropathy (CIDP). Contactin-1 and Nfasc155 are cell adhesion molecules that constitute the septate-like junctions observed by electron microscopy in the paranodes of myelinated axons. Antibodies to Contactin-1 have been shown to affect the localization of paranodal proteins both in patient nerve biopsies and in animal models after passive transfer. However, it is unclear whether these antibodies alter the paranodal ultrastructure...
March 2017: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/27957617/neuromyotonia-as-an-unusual-neurological-complication-of-primary-sj%C3%A3-gren-s-syndrome-case-report-and-literature-review
#16
REVIEW
Fei Xiao
Primary Sjögren's syndrome (PSS) is a systemic autoimmune disorder characterized by chronic inflammation of exocrine glands such as the lachrymal and salivary glands, leading to xerophthalmia and xerostomia. Neurological manifestations are sometimes found in patients with PSS. A variety of neurological complications has been reported in patients with PSS, and both the central nervous system (CNS) and peripheral nervous system (PNS) can be involved in PSS. Several forms of neuropathy, including polyneuropathy, cranial neuropathy, and multiple mononeuropathy, are often seen in PSS patients...
December 12, 2016: Clinical Rheumatology
https://www.readbyqxmd.com/read/27939751/estimating-axonal-strain-and-failure-following-white-matter-stretch-using-contactin-associated-protein-as-a-fiduciary-marker
#17
Sagar Singh, Assimina A Pelegri, David I Shreiber
Axonal injury occurs during trauma when tissue-scale loads are transferred to individual axons. Computational models are used to understand this transfer and predict the circumstances that cause injury. However, these findings are limited by a lack of validating experimental work examining the mechanics of axons in their in situ state. As a first step towards validation for dynamic stretch, we use contactin-associated protein (Caspr), expressed at the nodes of Ranvier, as a fiduciary marker of quasistatic axonal stretch...
January 25, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/27916751/-autoantibodies-in-chronic-inflammatory-neuropathies
#18
Ryo Yamasaki
Autoantibodies in chronic demyelinating neuropathies have been explored for several years. Recently, the peptides in the nodes of Ranvier have been the focus of attention in finding targets of autoantibodies. Until now, the most popular autoantibodies have been contactin-1 and neurofascin-155 for chronic demyelinating polyradiculoneuropathy (CIDP), GM1-ganglioside for multifocal motor neuropathy, and myelin-associated glycoprotein for polyneuropathy associated with monoclonal gammopathy of unknown significance...
December 2016: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/27916731/associations-between-the-cntnap2-gene-dorsolateral-prefrontal-cortex-and-cognitive-performance-on-the-stroop-task
#19
Bi Zhu, Chuansheng Chen, Gui Xue, Xuemei Lei, Yunxin Wang, Jin Li, Robert K Moyzis, Jun Li, Qi Dong, Chongde Lin
The CNTNAP2 (contactin-associated protein-like 2) gene, highly expressed in the human prefrontal cortex, has been linked with autism and language impairment. Potential relationships between CNTNAP2, dorsolateral prefrontal cortex (DLPFC), and cognition have been suggested by previous clinical studies, but have not been directly examined in the same study. The current study collected structural MRI, genetic, and behavioral data in 317 healthy Chinese adults, and examined associations between CNTNAP2 variants, DLPFC, and cognitive performance (measured by the Stroop task)...
December 1, 2016: Neuroscience
https://www.readbyqxmd.com/read/27871939/cell-cell-communication-mediated-by-the-car-subgroup-of-immunoglobulin-cell-adhesion-molecules-in-health-and-disease
#20
REVIEW
Claudia Matthäus, Hanna Langhorst, Laura Schütz, René Jüttner, Fritz G Rathjen
The immunoglobulin superfamily represents a diverse set of cell-cell contact proteins and includes well-studied members such as NCAM1, DSCAM, L1 or the contactins which are strongly expressed in the nervous system. In this review we put our focus on the biological function of a less understood subgroup of Ig-like proteins composed of CAR (coxsackievirus and adenovirus receptor), CLMP (CAR-like membrane protein) and BT-IgSF (brain and testis specific immunoglobulin superfamily). The CAR-related proteins are type I transmembrane proteins containing an N-terminal variable (V-type) and a membrane proximal constant (C2-type) Ig domain in their extracellular region which are implicated in homotypic adhesion...
November 18, 2016: Molecular and Cellular Neurosciences
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