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Metabotropic Glutamate Receptors
mGluR Metabotropic glutamate receptors mGluR (metabotropic glutamate receptor) is a type of glutamate receptor that are active through an indirect metabotropic process. They are members of thegroup C family of G-protein-coupled receptors, or GPCRs. Like all glutamate receptors, mGluRs bind with glutamate, an amino acid that functions as an excitatoryneurotransmitter. The mGluRs perform a variety of functions in the central and peripheral nervous systems: mGluRs are involved in learning, memory, anxiety, and the perception of pain. mGluRs are found in pre- and postsynaptic neurons in synapses of the hippocampus, cerebellum, and the cerebral cortex, as well as other parts of the brain and in peripheral tissues. Eight different types of mGluRs, labeled mGluR1 to mGluR8, are divided into groups I, II, and III. Receptor types are grouped based on receptor structure and physiological activity. www.MedChemExpress.com 1 mGluR Agonists, Antagonists, Inhibitors, Modulators & Activators (-)-Camphoric acid (1R,2S)-VU0155041 Cat. No.: HY-122808 Cat. No.: HY-14417A (-)-Camphoric acid is the less active enantiomer (1R,2S)-VU0155041, Cis regioisomer of VU0155041, is of Camphoric acid. Camphoric acid stimulates a partial mGluR4 agonist with an EC50 of 2.35 osteoblast differentiation and induces μM. glutamate receptor expression. Camphoric acid also significantly induced the activation of NF-κB and AP-1. Purity: ≥98.0% Purity: ≥98.0% Clinical Data: No Development Reported Clinical Data: No Development Reported Size: 10 mM × 1 mL, 100 mg Size: 10 mM × 1 mL, 5 mg, 10 mg, 25 mg (2R,4R)-APDC (R)-ADX-47273 Cat. No.: HY-102091 Cat. No.: HY-13058B (2R,4R)-APDC is a selective group II metabotropic (R)-ADX-47273 is a potent mGluR5 positive glutamate receptors (mGluRs) agonist. -
The G Protein-Coupled Glutamate Receptors As Novel Molecular Targets in Schizophrenia Treatment— a Narrative Review
Journal of Clinical Medicine Review The G Protein-Coupled Glutamate Receptors as Novel Molecular Targets in Schizophrenia Treatment— A Narrative Review Waldemar Kryszkowski 1 and Tomasz Boczek 2,* 1 General Psychiatric Ward, Babinski Memorial Hospital in Lodz, 91229 Lodz, Poland; [email protected] 2 Department of Molecular Neurochemistry, Medical University of Lodz, 92215 Lodz, Poland * Correspondence: [email protected] Abstract: Schizophrenia is a severe neuropsychiatric disease with an unknown etiology. The research into the neurobiology of this disease led to several models aimed at explaining the link between perturbations in brain function and the manifestation of psychotic symptoms. The glutamatergic hypothesis postulates that disrupted glutamate neurotransmission may mediate cognitive and psychosocial impairments by affecting the connections between the cortex and the thalamus. In this regard, the greatest attention has been given to ionotropic NMDA receptor hypofunction. However, converging data indicates metabotropic glutamate receptors as crucial for cognitive and psychomotor function. The distribution of these receptors in the brain regions related to schizophrenia and their regulatory role in glutamate release make them promising molecular targets for novel antipsychotics. This article reviews the progress in the research on the role of metabotropic glutamate receptors in schizophrenia etiopathology. Citation: Kryszkowski, W.; Boczek, T. The G Protein-Coupled Glutamate Keywords: schizophrenia; metabotropic glutamate receptors; positive allosteric modulators; negative Receptors as Novel Molecular Targets allosteric modulators; drug development; animal models of schizophrenia; clinical trials in Schizophrenia Treatment—A Narrative Review. J. Clin. Med. 2021, 10, 1475. https://doi.org/10.3390/ jcm10071475 1. Introduction Academic Editors: Andreas Reif, Schizophrenia is a common debilitating disease affecting about 0.3–1% of the human Blazej Misiak and Jerzy Samochowiec population worldwide [1]. -
2018 Ibangs Meeting: the 20Th Annual Genes, Brain & Behavior Meeting
5/25/2018 Program for Thursday, May 17th 2018 IBANGS MEETING: THE 20TH ANNUAL GENES, BRAIN & BEHAVIOR MEETING WELCOME PROGRAM INDEXES PROGRAM FOR THURSDAY, MAY 17TH Days: next day all days View: session overview talk overview 08:30-16:00 Session FV: Pre-IBANGS Satellite Meeting, Functional Validation for Neurogenetics Location: Phillips Hall in the Siebens building room 1-11. The Siebens building is located at the Downtown Mayo Clinic Campus (not the Mayo Civic Center). Description:The transformative nature of next generation sequencing has changed how neuroscientists approach genomic sequence variation. Highly multiplexed molecular testing is providing an expanded level of information from which to make informed phenotypic predictions. The importance of this is reflected in the unprecedented expansion of genomic testing to determine the basis of neurologic conditions. Genomic testing results in many instances provide a definitive basis of a neurologic condition. However, in almost a high proportion of cases, the genomic sequencing results are confounded by the ambiguity of variants with uncertain clinical significance. Herein lies the key with which institutions will lead in the area of genomic medicine. There exists a critical need to provide a mechanism by which uncertain findings can be functionally characterized and translated into clinically actionable results. It is within thisr ealm that academic societies such as IBANGS can have a substantial and informative role on the future of clinical research and practice. This symposium will introduce the challenges and opportunities that exist in the field of human clinical neurogenetics and follow this with presentations of active work in the field of functional genetic finding validation for neurogenetics with a look to the future of genomic neurogenetics. -
Whittle-Neuropharm-2013.Pdf
Neuropharmacology 64 (2013) 414e423 Contents lists available at SciVerse ScienceDirect Neuropharmacology journal homepage: www.elsevier.com/locate/neuropharm Deep brain stimulation, histone deacetylase inhibitors and glutamatergic drugs rescue resistance to fear extinction in a genetic mouse model Nigel Whittle a,*, Claudia Schmuckermair a, Ozge Gunduz Cinar b,d, Markus Hauschild a, Francesco Ferraguti c, Andrew Holmes b,d, Nicolas Singewald a a Department of Pharmacology and Toxicology, Institute of Pharmacy and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Innrain 80 e 82/III, A-6020 Innsbruck, Austria b Laboratory of Behavioral and Genomic Neuroscience, National Institute on Alcoholism and Alcohol Abuse, National Institutes of Health, Bethesda, MD 20852, USA Center for Neuroscience and Regenerative Medicine at the Uniformed Services University of the Health Sciences, Bethesda, MD c Department of Pharmacology, Innsbruck Medical University, A-6020 Innsbruck, Austria d Center for Neuroscience and Regenerative Medicine at the Uniformed Services University of the Health Sciences, Bethesda, MD, USA article info abstract Article history: Anxiety disorders are characterized by persistent, excessive fear. Therapeutic interventions that reverse Received 30 March 2012 deficits in fear extinction represent a tractable approach to treating these disorders. We previously re- Received in revised form ported that 129S1/SvImJ (S1) mice show no extinction learning following normal fear conditioning. We 31 May 2012 now demonstrate that weak fear conditioning does permit fear reduction during massed extinction Accepted 6 June 2012 training in S1 mice, but reveals specificdeficiency in extinction memory consolidation/retrieval. Rescue of this impaired extinction consolidation/retrieval was achieved with D-cycloserine (N-methly-D-aspar- Keywords: tate partial agonist) or MS-275 (histone deacetylase (HDAC) inhibitor), applied after extinction training. -
Meth/Amphetamine Use and Associated HIV: Implications for Global Policy and Public Health
International Journal of Drug Policy 21 (2010) 347–358 Contents lists available at ScienceDirect International Journal of Drug Policy journal homepage: www.elsevier.com/locate/drugpo Review Meth/amphetamine use and associated HIV: Implications for global policy and public health Louisa Degenhardt ∗,1, Bradley Mathers 2, Mauro Guarinieri 3, Samiran Panda 4, Benjamin Phillips 5, Steffanie A. Strathdee 6, Mark Tyndall 7, Lucas Wiessing 8, Alex Wodak 9, John Howard 10, the Reference Group to the United Nations on HIV and injecting drug use National Drug and Alcohol Research Centre, University of New South Wales, Sydney, NSW 2052, Australia article info abstract Article history: Amphetamine type stimulants (ATS) have become the focus of increasing attention worldwide. There are Received 29 May 2009 understandable concerns over potential harms including the transmission of HIV. However, there have Received in revised form 30 October 2009 been no previous global reviews of the extent to which these drugs are injected or levels of HIV among Accepted 24 November 2009 users. A comprehensive search of the international peer-reviewed and grey literature was undertaken. Multiple electronic databases were searched and documents and datasets were provided by UN agencies and key experts from around the world in response to requests for information on the epidemiology of use. Keywords: Amphetamine or methamphetamine (meth/amphetamine, M/A) use was documented in 110 countries, Methamphetamine Amphetamine and injection in 60 of those. Use may be more prevalent in East and South East Asia, North America, South HIV Africa, New Zealand, Australia and a number of European countries. In countries where the crystalline Injecting form is available, evidence suggests users are more likely to smoke or inject the drug; in such countries, Epidemiology higher levels of dependence may be occurring. -
Evidence-Based Guidelines for the Pharmacological Management of Substance Abuse, Harmful Use, Addictio
444324 JOP0010.1177/0269881112444324Lingford-Hughes et al.Journal of Psychopharmacology 2012 BAP Guidelines BAP updated guidelines: evidence-based guidelines for the pharmacological management of substance abuse, Journal of Psychopharmacology 0(0) 1 –54 harmful use, addiction and comorbidity: © The Author(s) 2012 Reprints and permission: sagepub.co.uk/journalsPermissions.nav recommendations from BAP DOI: 10.1177/0269881112444324 jop.sagepub.com AR Lingford-Hughes1, S Welch2, L Peters3 and DJ Nutt 1 With expert reviewers (in alphabetical order): Ball D, Buntwal N, Chick J, Crome I, Daly C, Dar K, Day E, Duka T, Finch E, Law F, Marshall EJ, Munafo M, Myles J, Porter S, Raistrick D, Reed LJ, Reid A, Sell L, Sinclair J, Tyrer P, West R, Williams T, Winstock A Abstract The British Association for Psychopharmacology guidelines for the treatment of substance abuse, harmful use, addiction and comorbidity with psychiatric disorders primarily focus on their pharmacological management. They are based explicitly on the available evidence and presented as recommendations to aid clinical decision making for practitioners alongside a detailed review of the evidence. A consensus meeting, involving experts in the treatment of these disorders, reviewed key areas and considered the strength of the evidence and clinical implications. The guidelines were drawn up after feedback from participants. The guidelines primarily cover the pharmacological management of withdrawal, short- and long-term substitution, maintenance of abstinence and prevention of complications, where appropriate, for substance abuse or harmful use or addiction as well management in pregnancy, comorbidity with psychiatric disorders and in younger and older people. Keywords Substance misuse, addiction, guidelines, pharmacotherapy, comorbidity Introduction guidelines (e.g. -
Randomized Controlled Trial of Dexamphetamine Maintenance for the Treatment of Methamphetamine
RESEARCH REPORT doi:10.1111/j.1360-0443.2009.02717.x Randomized controlled trial of dexamphetamine maintenance for the treatment of methamphetamine dependenceadd_2717 146..154 Marie Longo1, Wendy Wickes1, Matthew Smout1, Sonia Harrison1, Sharon Cahill1 & Jason M. White1,2 Pharmacotherapies Research Unit, Drug and Alcohol Services South Australia, Norwood, South Australia, Australia1 and Discipline of Pharmacology, University of Adelaide, Adelaide, South Australia, Australia2 ABSTRACT Aim To investigate the safety and efficacy of once-daily supervised oral administration of sustained-release dexam- phetamine in people dependent on methamphetamine. Design Randomized, double-blind, placebo-controlled trial. Participants Forty-nine methamphetamine-dependent drug users from Drug and Alcohol Services South Australia (DASSA) clinics. Intervention Participants were assigned randomly to receive up to 110 mg/day sustained- release dexamphetamine (n = 23) or placebo (n = 26) for a maximum of 12 weeks, with gradual reduction of the study medication over an additional 4 weeks. Medication was taken daily under pharmacist supervision. Measurements Primary outcome measures included treatment retention, measures of methamphetamine consump- tion (self-report and hair analysis), degree of methamphetamine dependence and severity of methamphetamine withdrawal. Hair samples were analysed for methamphetamine using liquid chromatography-mass spectrometry. Findings Treatment retention was significantly different between groups, with those who received dexamphetamine remaining in treatment for an average of 86.3 days compared with 48.6 days for those receiving placebo (P = 0.014). There were significant reductions in self-reported methamphetamine use between baseline and follow-up within each group (P < 0.0001), with a trend to a greater reduction among the dexamphetamine group (P = 0.086). -
G Protein-Coupled Receptors
S.P.H. Alexander et al. The Concise Guide to PHARMACOLOGY 2015/16: G protein-coupled receptors. British Journal of Pharmacology (2015) 172, 5744–5869 THE CONCISE GUIDE TO PHARMACOLOGY 2015/16: G protein-coupled receptors Stephen PH Alexander1, Anthony P Davenport2, Eamonn Kelly3, Neil Marrion3, John A Peters4, Helen E Benson5, Elena Faccenda5, Adam J Pawson5, Joanna L Sharman5, Christopher Southan5, Jamie A Davies5 and CGTP Collaborators 1School of Biomedical Sciences, University of Nottingham Medical School, Nottingham, NG7 2UH, UK, 2Clinical Pharmacology Unit, University of Cambridge, Cambridge, CB2 0QQ, UK, 3School of Physiology and Pharmacology, University of Bristol, Bristol, BS8 1TD, UK, 4Neuroscience Division, Medical Education Institute, Ninewells Hospital and Medical School, University of Dundee, Dundee, DD1 9SY, UK, 5Centre for Integrative Physiology, University of Edinburgh, Edinburgh, EH8 9XD, UK Abstract The Concise Guide to PHARMACOLOGY 2015/16 provides concise overviews of the key properties of over 1750 human drug targets with their pharmacology, plus links to an open access knowledgebase of drug targets and their ligands (www.guidetopharmacology.org), which provides more detailed views of target and ligand properties. The full contents can be found at http://onlinelibrary.wiley.com/doi/ 10.1111/bph.13348/full. G protein-coupled receptors are one of the eight major pharmacological targets into which the Guide is divided, with the others being: ligand-gated ion channels, voltage-gated ion channels, other ion channels, nuclear hormone receptors, catalytic receptors, enzymes and transporters. These are presented with nomenclature guidance and summary information on the best available pharmacological tools, alongside key references and suggestions for further reading. -
Management of Acute Withdrawal and Detoxification for Adults Who Misuse Methamphetamine: a Review of the Clinical Evidence and Guidelines
CADTH RAPID RESPONSE REPORT: SUMMARY WITH CRITICAL APPRAISAL Management of Acute Withdrawal and Detoxification for Adults who Misuse Methamphetamine: A Review of the Clinical Evidence and Guidelines Service Line: Rapid Response Service Version: 1.0 Publication Date: February 08, 2019 Report Length: 28 Pages Authors: Michelle Clark, Robin Featherstone Cite As: Management of Acute Withdrawal and Detoxification for Adults who Misuse Methamphetamine: A Review of the Clinical Evidence and Guidelines. Ottawa: CADTH; 2019 Feb. (CADTH rapid response report: summary with critical appraisal). ISSN: 1922-8147 (online) Disclaimer: The information in this document is intended to help Canadian health care decision-makers, health care professionals, health systems leaders, and policy-makers make well-informed decisions and thereby improve the quality of health care services. While patients and others may access this document, the document is made available for informational purposes only and no representations or warranties are made with respect to its fitness for any particular purpose. The information in this document should not be used as a substitute for professional medical advice or as a substitute for the application of clinical judgment in respect of the care of a particular patient or other professional judgment in any decision-making process. The Canadian Agency for Drugs and Technologies in Health (CADTH) does not endorse any information, drugs, therapies, treatments, products, processes, or services. While care has been taken to ensure that the information prepared by CADTH in this document is accurate, complete, and up-to-date as at the applicable date the material was first published by CADTH, CADTH does not make any guarantees to that effect. -
Activation of Group I Metabotropic Glutamate Receptors Potentiates Heteromeric Kainate Receptors
1521-0111/83/1/106–121$25.00 http://dx.doi.org/10.1124/mol.112.081802 MOLECULAR PHARMACOLOGY Mol Pharmacol 83:106–121, January 2013 Copyright ª 2013 by The American Society for Pharmacology and Experimental Therapeutics Activation of Group I Metabotropic Glutamate Receptors Potentiates Heteromeric Kainate Receptors Asheebo Rojas, Jonathon Wetherington, Renee Shaw, Geidy Serrano, Sharon Swanger, and Raymond Dingledine Department of Pharmacology, Emory University, Atlanta, Georgia Received August 10, 2012; accepted October 11, 2012 ABSTRACT Kainate receptors (KARs), a family of ionotropic glutamate KARs by mGlu1 activation was attenuated by GDPbS, blocked receptors, are widely expressed in the central nervous system by an inhibitor of phospholipase C or the calcium chelator 1,2- and are critically involved in synaptic transmission. KAR bis(o-aminophenoxy)ethane-N,N,N9,N9-tetraacetic acid (BAPTA), activation is influenced by metabotropic glutamate receptor prolonged by the phosphatase inhibitor okadaic acid, but un- (mGlu) signaling, but the underlying mechanisms are not affected by the tyrosine kinase inhibitor lavendustin A. Protein understood. We undertook studies to examine how mGlu kinase C (PKC) inhibition reduced the potentiation by mGlu1 of modulation affects activation of KARs. Confocal immunohisto- GluK2/GluK5, and conversely, direct activation of PKC by chemistry of rat hippocampus and cultured rat cortex revealed phorbol 12-myristate,13-acetate potentiated GluK2/GluK5. Using colocalization of the high-affinity KAR subunits with group I site-directed mutagenesis, we identified three serines (Ser833, mGlu receptors. In hippocampal and cortical cultures, the Ser836, and Ser840) within the membrane proximal region of the calcium signal caused by activation of native KARs was po- GluK5 C-terminal domain that, in combination, are required for tentiated by activation of group I mGlu receptors. -
Heterogeneity of Stimulant Dependence: a National Drug Abuse Treatment Clinical Trials Network Study
The American Journal on Addictions, 18: 206–218, 2009 Copyright C American Academy of Addiction Psychiatry ISSN: 1055-0496 print / 1521-0391 online DOI: 10.1080/10550490902787031 Heterogeneity of Stimulant Dependence: A National Drug Abuse Treatment Clinical Trials Network Study Li-Tzy Wu, ScD,1 Dan G. Blazer, MD, PhD,1 Ashwin A. Patkar, MD,1 Maxine L. Stitzer, PhD,2 Paul G. Wakim, PhD,3 Robert K. Brooner, PhD2 1Duke University School of Medicine, Department of Psychiatry and Behavioral Sciences, Duke Clinical Research Institute, Durham, North Carolina 2Johns Hopkins University School of Medicine, Department of Psychiatry and Behavioral Sciences, Baltimore, Maryland 3National Institute on Drug Abuse, Bethesda, Maryland We investigated the presence of DSM-IV subtyping for of disorders has noteworthy advantages because it facilitates dependence on cocaine and amphetamines (with versus with- research, improves communications among clinicians and out physical dependence) among outpatient stimulant users researchers, and serves as a necessary tool for collecting enrolled in a multisite study of the Clinical Trials Network 1 (CTN). Three mutually exclusive groups were identified: and communicating public health statistics. The categorical primary cocaine users (n = 287), primary amphetamine users classification, however, also constitutes a primary limitation (n = 99), and dual users (cocaine and amphetamines; n = because it works best when all members of a given diagnosis 29). Distinct subtypes were examined with latent class and are homogeneous and when there are clear boundaries between logistic regression procedures. Cocaine users were distinct distinct diagnoses.1 from amphetamine users in age and race/ethnicity. There were four distinct classes of primary cocaine users: non- DSM-IV acknowledges this limitation and further suggests dependence (15%), compulsive use (14%), tolerance and the presence of heterogeneity among individuals who share compulsive use (15%), and physiological dependence (toler- a diagnosis. -
Metabotropic Glutamate Receptor 7 Modulates the Rewarding Effects of Cocaine in Rats: Involvement of a Ventral Pallidal Gabaergic Mechanism
Neuropsychopharmacology (2009) 34, 1783–1796 & 2009 Nature Publishing Group All rights reserved 0893-133X/09 $32.00 www.neuropsychopharmacology.org Metabotropic Glutamate Receptor 7 Modulates the Rewarding Effects of Cocaine in Rats: Involvement of a Ventral Pallidal GABAergic Mechanism 1 1 1 1 1 ,1 Xia Li , Jie Li , Xiao-Qing Peng , Krista Spiller , Eliot L Gardner and Zheng-Xiong Xi* 1Neuropsychopharmacology Section, Chemical Biology Research Branch, Intramural Research Program, National Institute on Drug Abuse, Baltimore, MD, USA The metabotropic glutamate receptor 7 (mGluR7) has received much attention as a potential target for the treatment of epilepsy, major depression, and anxiety. In this study, we investigated the possible involvement of mGluR7 in cocaine reward in animal models of drug addiction. Pretreatment with the selective mGluR7 allosteric agonist N,N’-dibenzyhydryl-ethane-1,2-diamine dihydrochloride (AMN082; 1-20 mg/kg, i.p.) dose-dependently inhibited cocaine-induced enhancement of electrical brain-stimulation reward and intravenous cocaine self-administration under both fixed-ratio and progressive-ratio reinforcement conditions, but failed to alter either basal or cocaine-enhanced locomotion or oral sucrose self-administration, suggesting a specific inhibition of cocaine reward. Microinjections of AMN082 (1–5 mg/ml per side) into the nucleus accumbens (NAc) or ventral pallidum (VP), but not dorsal striatum, also inhibited cocaine self-administration in a dose-dependent manner. Intra-NAc or intra-VP co-administration of 6-(4-methoxyphenyl)-5-methyl-3-pyridin- 4-ylisoxazolo[4,5-c]pyridin-4(5H)-one (MMPIP, 5 mg/ml per side), a selective mGluR7 allosteric antagonist, significantly blocked AMN082’s action, suggesting an effect mediated by mGluR7 in these brain regions.