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Mglu2 Receptor Agonism, but Not Positive Allosteric Modulation, Elicits Rapid Tolerance Towards Their Primary Efficacy on Sleep Measures in Rats
RESEARCH ARTICLE mGlu2 Receptor Agonism, but Not Positive Allosteric Modulation, Elicits Rapid Tolerance towards Their Primary Efficacy on Sleep Measures in Rats Abdallah Ahnaou1*, Hilde Lavreysen1, Gary Tresadern2, Jose M. Cid2, Wilhelmus H. Drinkenburg1 1 Dept. of Neuroscience, Janssen Research & Development, A Division of Janssen Pharmaceutica N.V., Turnhoutseweg 30, B-2340, Beerse, Belgium, 2 Neuroscience Medicinal Chemistry, Janssen Research & Development, Janssen-Cilag S.A., Jarama 75, Polígono Industrial, 45007, Toledo, Spain * [email protected] Abstract OPEN ACCESS G-protein-coupled receptor (GPCR) agonists are known to induce both cellular adaptations Citation: Ahnaou A, Lavreysen H, Tresadern G, Cid resulting in tolerance to therapeutic effects and withdrawal symptoms upon treatment dis- JM, Drinkenburg WH (2015) mGlu2 Receptor continuation. Glutamate neurotransmission is an integral part of sleep-wake mechanisms, Agonism, but Not Positive Allosteric Modulation, Elicits Rapid Tolerance towards Their Primary which processes have translational relevance for central activity and target engagement. Efficacy on Sleep Measures in Rats. PLoS ONE 10 Here, we investigated the efficacy and tolerance potential of the metabotropic glutamate (12): e0144017. doi:10.1371/journal.pone.0144017 receptors (mGluR2/3) agonist LY354740 versus mGluR2 positive allosteric modulator Editor: James Porter, University of North Dakota, (PAM) JNJ-42153605 on sleep-wake organisation in rats. In vitro, the selectivity and UNITED STATES potency of JNJ-42153605 were characterized. In vivo, effects on sleep measures were Received: July 12, 2015 investigated in rats after once daily oral repeated treatment for 7 days, withdrawal and con- Accepted: November 12, 2015 secutive re-administration of LY354740 (1–10 mg/kg) and JNJ-42153605 (3–30 mg/kg). -
Wnt Signaling in Vertebrate Neural Development and Function
J Neuroimmune Pharmacol (2012) 7:774–787 DOI 10.1007/s11481-012-9404-x INVITED REVIEW Wnt Signaling in Vertebrate Neural Development and Function Kimberly A. Mulligan & Benjamin N. R. Cheyette Received: 18 June 2012 /Accepted: 10 September 2012 /Published online: 27 September 2012 # Springer Science+Business Media, LLC 2012 Abstract Members of the Wnt family of secreted signaling immature neurons migrate to populate different cortical proteins influence many aspects of neural development and layers, nuclei, and ganglia in the forebrain, midbrain, hind- function. Wnts are required from neural induction and axis brain, and spinal cord. Each mature neuron elaborates an formation to axon guidance and synapse development, and axon and numerous dendrites while forming hundreds to even help modulate synapse activity. Wnt proteins activate a thousands of synapses with other neurons, enabling electro- variety of downstream signaling pathways and can induce a chemical communication throughout the nervous system. similar variety of cellular responses, including gene tran- All these developmental processes must be coordinated to scription changes and cytoskeletal rearrangements. This re- ensure proper construction and function of the CNS, and view provides an introduction to Wnt signaling pathways this requires the coordinated developmental activity of a and discusses current research on their roles in vertebrate vast array of genes. neural development and function. Members of the Wnt family of secreted signaling proteins are implicated in every step of neural development men- Keywords Wnt signaling . Neural development . tioned above. Wnt proteins provide positional information CNS patterning . Axon guidance . Dendrite growth . within the embryo for anterior-posterior axis specification of Synapse formation . -
Glial Insulin Regulates Cooperative Or Antagonistic Golden Goal/Flamingo
RESEARCH ARTICLE Glial insulin regulates cooperative or antagonistic Golden goal/Flamingo interactions during photoreceptor axon guidance Hiroki Takechi1, Satoko Hakeda-Suzuki1*, Yohei Nitta2,3, Yuichi Ishiwata1, Riku Iwanaga1, Makoto Sato4,5, Atsushi Sugie2,3, Takashi Suzuki1* 1Graduate School of Life Science and Technology, Tokyo Institute of Technology, Yokohama, Japan; 2Center for Transdisciplinary Research, Niigata University, Niigata, Japan; 3Brain Research Institute, Niigata University, Niigata, Japan; 4Mathematical Neuroscience Unit, Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, Japan; 5Laboratory of Developmental Neurobiology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan Abstract Transmembrane protein Golden goal (Gogo) interacts with atypical cadherin Flamingo (Fmi) to direct R8 photoreceptor axons in the Drosophila visual system. However, the precise mechanisms underlying Gogo regulation during columnar- and layer-specific R8 axon targeting are unknown. Our studies demonstrated that the insulin secreted from surface and cortex glia switches the phosphorylation status of Gogo, thereby regulating its two distinct functions. Non- phosphorylated Gogo mediates the initial recognition of the glial protrusion in the center of the medulla column, whereas phosphorylated Gogo suppresses radial filopodia extension by counteracting Flamingo to maintain a one axon-to-one column ratio. Later, Gogo expression ceases during the midpupal stage, thus allowing R8 filopodia to extend vertically into the M3 layer. These *For correspondence: results demonstrate that the long- and short-range signaling between the glia and R8 axon growth [email protected] (SH-S); cones regulates growth cone dynamics in a stepwise manner, and thus shapes the entire [email protected] (TS) organization of the visual system. Competing interests: The authors declare that no competing interests exist. -
Conformational Dynamics Between Transmembrane Domains And
RESEARCH ARTICLE Conformational dynamics between transmembrane domains and allosteric modulation of a metabotropic glutamate receptor Vanessa A Gutzeit1, Jordana Thibado2, Daniel Starer Stor2, Zhou Zhou3, Scott C Blanchard2,3,4, Olaf S Andersen2,3, Joshua Levitz2,4,5* 1Neuroscience Graduate Program, Weill Cornell Graduate School of Medical Sciences, New York, United States; 2Physiology, Biophysics and Systems Biology Graduate Program, Weill Cornell Graduate School of Medical Sciences, New York, United States; 3Department of Physiology and Biophysics, Weill Cornell Medicine, New York, United States; 4Tri-Institutional PhD Program in Chemical Biology, New York, United States; 5Department of Biochemistry, Weill Cornell Medicine, New York, United States Abstract Metabotropic glutamate receptors (mGluRs) are class C, synaptic G-protein-coupled receptors (GPCRs) that contain large extracellular ligand binding domains (LBDs) and form constitutive dimers. Despite the existence of a detailed picture of inter-LBD conformational dynamics and structural snapshots of both isolated domains and full-length receptors, it remains unclear how mGluR activation proceeds at the level of the transmembrane domains (TMDs) and how TMD-targeting allosteric drugs exert their effects. Here, we use time-resolved functional and conformational assays to dissect the mechanisms by which allosteric drugs activate and modulate mGluR2. Single-molecule subunit counting and inter-TMD fluorescence resonance energy transfer *For correspondence: measurements in living cells -
Inaugural – Dissertation
INAUGURAL – DISSERTATION zur Erlangung der Doktorwürde der Naturwissenschaftlich-Mathematischen Gesamtfakultät der Ruprecht - Karls - Universität Heidelberg vorgelegt von Diplom-Biochemikerin Nadine Stephanie Kirsch geboren in Heidelberg Tag der mündlichen Prüfung: ……………………………………………. Analysis of novel Wnt pathway components acting at the receptor level Gutachter: Prof. Dr. Christof Niehrs Prof. Dr. Thomas Holstein Table of Contents Table of Contents 1. Summary .......................................................................................................................... 1 2. Zusammenfassung ........................................................................................................... 2 3. Introduction ..................................................................................................................... 3 3.1 Wnt signaling transduction cascades ......................................................................... 3 3.1.1 Wnt/β-catenin signaling ...................................................................................... 4 3.1.2 Wnt/PCP signaling ............................................................................................... 6 3.2 Wnt/β-catenin signaling regulation at the receptor level ......................................... 8 3.2.1 Wnt receptors ...................................................................................................... 8 3.2.2 Extracellular modifiers ...................................................................................... -
A Role for Atypical Cadherincelsr3in Hippocampal Maturation And
The Journal of Neuroscience, October 3, 2012 • 32(40):13729–13743 • 13729 Development/Plasticity/Repair A Role for Atypical Cadherin Celsr3 in Hippocampal Maturation and Connectivity Jia Feng,1 Ying Xu,1 Meizhi Wang,1 Yiwen Ruan,1 Kwok-Fai So,1,2 Fadel Tissir,3 Andre Goffinet,3 and Libing Zhou1 1Joint Laboratory for Brain Function and Health, Jinan University and the University of Hong Kong, Medical School of Jinan University, Guangzhou 510632, People’s Republic of China, 2Department of Anatomy, the University of Hong Kong, Pokfulam, Hong Kong SAR, People’s Republic of China, and 3Institute of Neuroscience, Universite´ Catholique de Louvain, B1200 Brussels, Belgium Atypical cadherin Celsr3, a regulator of planar cell polarity, is critical for the development of the axonal blueprint. We previously showed that expression of Celsr3 is necessary to establish forebrain connections such as the anterior commissure and thalamocortical and corticospinal tracts. The requirement for Celsr3 during hippocampal wiring and its action in the hippocampus remain largely unex- plored. Here, we compared the connectivity and maturation of the hippocampal formation in Celsr3͉Foxg1 and Celsr3͉Dlx mice. Celsr3 is inactivated in the whole telencephalon, including the hippocampal primordium, in Celsr3͉Foxg1 mice, and in the early basal telenceph- alon, including ganglionic eminences and ventral diencephalon, in Celsr3͉Dlx mice. Behavioral tests showed that both mutants were hyperactive and had impaired learning and memory. Abnormal cytoarchitecture of CA1, CA3, and dentate gyrus was found in the Celsr3͉Foxg1 mutant, in which afferent and efferent hippocampal pathways, as well as intrinsic connections, were dramatically disrupted. In Celsr3͉Dlx mutant mice, hippocampal cytoarchitecture was mildly affected and extrinsic and intrinsic connectivity moderately dis- turbed. -
©2017 Allison L. Isola ALL RIGHTS RESERVED
©2017 Allison L. Isola ALL RIGHTS RESERVED ROLE OF GRM1 IN EXOSOME PRODUCTION AND MELANOMA METASTASIS By ALLISON L. ISOLA A Dissertation submitted to the School of Graduate Studies Rutgers, The State University of New Jersey In partial fulfillment of the requirements For the degree of Doctor of Philosophy Graduate Program in Toxicology Written under the direction of Dr. Suzie Chen And approved by ______________________________________ ______________________________________ ______________________________________ ______________________________________ ______________________________________ New Brunswick, New Jersey October 2017 ABSTRACT OF THE DISSERTATION Role of GRM1 in Exosome Production and Melanoma Metastasis By Allison L. Isola Dissertation Director: Suzie Chen Exosomes are naturally occurring membrane-bound nanovesicles generated constitutively and released by various cell types, and often in higher quantities by tumor cells. Exosomes have been postulated to facilitate communication between the primary tumor and its local microenvironment, supporting cell invasion and other early events in metastasis. A neuronal receptor, metabotropic glutamate receptor 1 (GRM1), when ectopically expressed in melanocytes, induces in vitro melanocytic transformation and spontaneous malignant melanoma development in vivo in a transgenic mouse model. Earlier studies showed that genetic modulation in GRM1 expression by siRNA or disruption of GRM1-mediated glutamate signaling by pharmacological inhibitors interfering with downstream effectors resulting -
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. -
An Evolutionary Based Strategy for Predicting Rational Mutations in G Protein-Coupled Receptors
Ecology and Evolutionary Biology 2021; 6(3): 53-77 http://www.sciencepublishinggroup.com/j/eeb doi: 10.11648/j.eeb.20210603.11 ISSN: 2575-3789 (Print); ISSN: 2575-3762 (Online) An Evolutionary Based Strategy for Predicting Rational Mutations in G Protein-Coupled Receptors Miguel Angel Fuertes*, Carlos Alonso Department of Microbiology, Centre for Molecular Biology “Severo Ochoa”, Spanish National Research Council and Autonomous University, Madrid, Spain Email address: *Corresponding author To cite this article: Miguel Angel Fuertes, Carlos Alonso. An Evolutionary Based Strategy for Predicting Rational Mutations in G Protein-Coupled Receptors. Ecology and Evolutionary Biology. Vol. 6, No. 3, 2021, pp. 53-77. doi: 10.11648/j.eeb.20210603.11 Received: April 24, 2021; Accepted: May 11, 2021; Published: July 13, 2021 Abstract: Capturing conserved patterns in genes and proteins is important for inferring phenotype prediction and evolutionary analysis. The study is focused on the conserved patterns of the G protein-coupled receptors, an important superfamily of receptors. Olfactory receptors represent more than 2% of our genome and constitute the largest family of G protein-coupled receptors, a key class of drug targets. As no crystallographic structures are available, mechanistic studies rely on the use of molecular dynamic modelling combined with site-directed mutagenesis data. In this paper, we hypothesized that human-mouse orthologs coding for G protein-coupled receptors maintain, at speciation events, shared compositional structures independent, to some extent, of their percent identity as reveals a method based in the categorization of nucleotide triplets by their gross composition. The data support the consistency of the hypothesis, showing in ortholog G protein-coupled receptors the presence of emergent shared compositional structures preserved at speciation events. -
Multi-Functionality of Proteins Involved in GPCR and G Protein Signaling: Making Sense of Structure–Function Continuum with In
Cellular and Molecular Life Sciences (2019) 76:4461–4492 https://doi.org/10.1007/s00018-019-03276-1 Cellular andMolecular Life Sciences REVIEW Multi‑functionality of proteins involved in GPCR and G protein signaling: making sense of structure–function continuum with intrinsic disorder‑based proteoforms Alexander V. Fonin1 · April L. Darling2 · Irina M. Kuznetsova1 · Konstantin K. Turoverov1,3 · Vladimir N. Uversky2,4 Received: 5 August 2019 / Revised: 5 August 2019 / Accepted: 12 August 2019 / Published online: 19 August 2019 © Springer Nature Switzerland AG 2019 Abstract GPCR–G protein signaling system recognizes a multitude of extracellular ligands and triggers a variety of intracellular signal- ing cascades in response. In humans, this system includes more than 800 various GPCRs and a large set of heterotrimeric G proteins. Complexity of this system goes far beyond a multitude of pair-wise ligand–GPCR and GPCR–G protein interactions. In fact, one GPCR can recognize more than one extracellular signal and interact with more than one G protein. Furthermore, one ligand can activate more than one GPCR, and multiple GPCRs can couple to the same G protein. This defnes an intricate multifunctionality of this important signaling system. Here, we show that the multifunctionality of GPCR–G protein system represents an illustrative example of the protein structure–function continuum, where structures of the involved proteins represent a complex mosaic of diferently folded regions (foldons, non-foldons, unfoldons, semi-foldons, and inducible foldons). The functionality of resulting highly dynamic conformational ensembles is fne-tuned by various post-translational modifcations and alternative splicing, and such ensembles can undergo dramatic changes at interaction with their specifc partners. -
G Protein‐Coupled Receptors
S.P.H. Alexander et al. The Concise Guide to PHARMACOLOGY 2019/20: G protein-coupled receptors. British Journal of Pharmacology (2019) 176, S21–S141 THE CONCISE GUIDE TO PHARMACOLOGY 2019/20: G protein-coupled receptors Stephen PH Alexander1 , Arthur Christopoulos2 , Anthony P Davenport3 , Eamonn Kelly4, Alistair Mathie5 , John A Peters6 , Emma L Veale5 ,JaneFArmstrong7 , Elena Faccenda7 ,SimonDHarding7 ,AdamJPawson7 , Joanna L Sharman7 , Christopher Southan7 , Jamie A Davies7 and CGTP Collaborators 1School of Life Sciences, University of Nottingham Medical School, Nottingham, NG7 2UH, UK 2Monash Institute of Pharmaceutical Sciences and Department of Pharmacology, Monash University, Parkville, Victoria 3052, Australia 3Clinical Pharmacology Unit, University of Cambridge, Cambridge, CB2 0QQ, UK 4School of Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol, BS8 1TD, UK 5Medway School of Pharmacy, The Universities of Greenwich and Kent at Medway, Anson Building, Central Avenue, Chatham Maritime, Chatham, Kent, ME4 4TB, UK 6Neuroscience Division, Medical Education Institute, Ninewells Hospital and Medical School, University of Dundee, Dundee, DD1 9SY, UK 7Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, EH8 9XD, UK Abstract The Concise Guide to PHARMACOLOGY 2019/20 is the fourth in this series of biennial publications. The Concise Guide provides concise overviews of the key properties of nearly 1800 human drug targets with an emphasis on selective pharmacology (where available), plus links to the open access knowledgebase source of drug targets and their ligands (www.guidetopharmacology.org), which provides more detailed views of target and ligand properties. Although the Concise Guide represents approximately 400 pages, the material presented is substantially reduced compared to information and links presented on the website. -
The Cytoplasmic LIM Domain Protein Espinas Contributes to Photoreceptor Layer Selection in the Visual System
biology Article The Cytoplasmic LIM Domain Protein Espinas Contributes to Photoreceptor Layer Selection in the Visual System 1,2, 1,2, 1 Alejandra Fernández-Pineda y , Martí Monge-Asensio y , Martín Rios and Marta Morey 1,2,* 1 Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, 08028 Barcelona, Spain; [email protected] (A.F.-P.); [email protected] (M.M.-A.); [email protected] (M.R.) 2 Institut de Biomedicina (IBUB), Universitat de Barcelona, 08028 Barcelona, Spain * Correspondence: [email protected] Equal contribution. y Received: 27 November 2020; Accepted: 12 December 2020; Published: 14 December 2020 Simple Summary: One of the central questions in neurobiology is how neurons discriminate between one another during circuit assembly. A common strategy of many nervous systems is the organization of brain regions in layers, to facilitate that neurons encounter a limited repertoire of synaptic partners. The fly visual system, which is structured in layers like many regions of the vertebrate brain, is used to identify cell surface molecules that mediate recognition between neurons and allow them to extend to specific layers. However, little is known about the intracellular pathways that link cell surface molecules to the cytoskeleton to determine whether or not to stabilize in a layer. Flamingo and its vertebrate homologs CELSR1/2 are cell surface molecules with widespread roles in neurite growth. In the fly visual system in particular, Flamingo regulates layer selection of a particular neuronal type. Our data suggests that in this context, Flamingo signals to the cytoskeleton through the conserved cytoplasmic molecule Espinas/PRICKLE2. Given that Flamingo and Espinas, as well as their respective vertebrate homologs, are broadly expressed in the nervous system, elucidating the interactions between them can reveal conserved mechanisms and provide valuable insights into the assembly of neural circuits.