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Strategies to Increase ß-Cell Mass Expansion
This electronic thesis or dissertation has been downloaded from the King’s Research Portal at https://kclpure.kcl.ac.uk/portal/ Strategies to increase -cell mass expansion Drynda, Robert Lech Awarding institution: King's College London The copyright of this thesis rests with the author and no quotation from it or information derived from it may be published without proper acknowledgement. END USER LICENCE AGREEMENT Unless another licence is stated on the immediately following page this work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International licence. https://creativecommons.org/licenses/by-nc-nd/4.0/ You are free to copy, distribute and transmit the work Under the following conditions: Attribution: You must attribute the work in the manner specified by the author (but not in any way that suggests that they endorse you or your use of the work). Non Commercial: You may not use this work for commercial purposes. No Derivative Works - You may not alter, transform, or build upon this work. Any of these conditions can be waived if you receive permission from the author. Your fair dealings and other rights are in no way affected by the above. Take down policy If you believe that this document breaches copyright please contact [email protected] providing details, and we will remove access to the work immediately and investigate your claim. Download date: 02. Oct. 2021 Strategies to increase β-cell mass expansion A thesis submitted by Robert Drynda For the degree of Doctor of Philosophy from King’s College London Diabetes Research Group Division of Diabetes & Nutritional Sciences Faculty of Life Sciences & Medicine King’s College London 2017 Table of contents Table of contents ................................................................................................. -
Supporting Information
Supporting Information Koyanagi et al. 10.1073/pnas.0806215105 SI Materials and Methods CNGB, NM137763; human CNGB1, NM001297; human Amino Acid Sequences. The accession numbers of amino acid CNGB3, NM 019098; box jellyfish CNG, AB435552; fruit fly sequences used for analyses are as follows: Box jellyfish opsin, CNG4, NM 167441; fruit fly CNG3, NM 137871; human AB435549; sea anemone opsin, BR000662; hydra opsin, Con- CNGA4, NM 001037329; fruit fly CNGA, NM 057768; human CNGA1, NM000087; human CNGA2, NM005140; human tig39347:487820–488855 (http://hydrazome.metazome.net); hy- drozaon jellyfish opsin, AB332435; human encephalopsin, CNGA3, NM 001298. AF140242; ragworm c-opsin, AY692353; human rhodopsin, Western Blot Analysis. The proteins extracted from half a rhopalia U49742; human blue, M13299; human red, Z68193; lamprey were separated by 12% SDS/PAGE, transferred onto a PVDF parapinopsin, AB116380; lizard parietopsin, DQ100320; am- membrane, and incubated with 1:500 diluted anti-box jellyfish phioxus peropsin, AB050610; human peropsin, AF012270; hu- opsin antiserum. Visualization was carried out by the ABC man rgr, U15790; squid retinochrome, X57143; human melan- method (Vectastain) and by staining with 3,3Ј-diaminobenzidine opsin, AF147788; amphioxus melanopsin, AB205400; squid (Sigma). rhodopsin, X70498; fruit fly Rh1, K02315; human neuropsin, AY377391; amphioxus rhodopsin, AB050606; scallop Go- In Situ Hybridization. Digoxigenin-labeled antisense and sense RNA rhodopsin, AB006455; human muscarinic acetylcholine receptor probes for the box jellyfish opsin were synthesized by using the DIG M1 (CHRM1), NM000738; human melatonin receptor 1A RNA labeling kit (Roche). Sections were pretreated with protein- (MTNR1A), NM005958; Arabidopsis AKT1, U06745; Arabi- ase K and hybridized with each RNA probe. -
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 . -
From Inverse Agonism to 'Paradoxical Pharmacology' Richard A
International Congress Series 1249 (2003) 27-37 From inverse agonism to 'Paradoxical Pharmacology' Richard A. Bond*, Kenda L.J. Evans, Zsirzsanna Callaerts-Vegh Department of Pharmacological and Pharmaceutical Sciences, University of Houston, 521 Science and Research Bldg 2, 4800 Caltioun, Houston, TX 77204-5037, USA Received 16 April 2003; accepted 16 April 2003 Abstract The constitutive or spontaneous activity of G protein-coupled receptors (GPCRs) and compounds acting as inverse agonists is a recent but well-established phenomenon. Dozens of receptor subtypes for numerous neurotransmitters and hormones have been shown to posses this property. However, do to the apparently low percentage of receptors in the spontaneously active state, the physiologic relevance of these findings remains questionable. The possibility that the reciprocal nature of the effects of agonists and inverse agonists may extend to cellular signaling is discussed, and that this may account for the beneficial effects of certain p-adrenoceptor inverse agonists in the treatment of heart failure. © 2003 Elsevier Science B.V. All rights reserved. Keywords. Inverse agonism; GPCR; Paradoxical pharmacology 1. Brief history of inverse agonism at G protein-coupled receptors For approximately three-quarters of a century, ligands that interacted with G protein- coupled receptors (GPCRs) were classified either as agonists or antagonists. Receptors were thought to exist in a single quiescent state that could only induce cellular signaling upon agonist binding to the receptor to produce an activated state of the receptor. In this model, antagonists had no cellular signaling ability on their own, but did bind to the receptor and prevented agonists from being able to bind and activate the receptor. -
Multiplex Gpcr Internalization Assay Using Reverse Transduction on Adenoviral Vector Immobilized Microparticles S
MULTIPLEX GPCR INTERNALIZATION ASSAY USING REVERSE TRANSDUCTION ON ADENOVIRAL VECTOR IMMOBILIZED MICROPARTICLES S. Han1,2, H.J. Bae1,2, W. Park3 and S. Kwon1,2* 1Department of Electrical and Computer Engineering, Inter-university Semiconductor Research Center (ISRC), Seoul National University, SOUTH KOREA 2Center for Nanoparticle Research, Institute for Basic Science (IBS), SOUTH KOREA and 3Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, SOUTH KOREA ABSTRACT We present a new multiplexing method for high-throughput cell-based assays in a microtiter well based on reverse transduction of cells by adenoviral vectors immobilized on encoded microparticles. Our particle-based approach spatially confines the gene delivery to cells seeded on the particles and provides the code for identifying the delivered gene, thus easily achieving a multiplex cell microarray in a microtiter well by means of a single pipetting without the cross- expression of genes and the positional identification. Utilizing this method with adenoviral vectors having a G-protein coupled recpeptor (GPCR) gene, we demonstrated 3-plex GPCR internalization assay. KEYWORDS: Multiplex GPCR assay, Reverse transduction, Adenovirus, Encoded microparticle INTRODUCTION G-protein coupled receptors (GPCRs) in the cell membrane are major drug targets in pharmaceutical industry since they interact with a huge variety of endogenous ligands and trigger intracellular functions related to many physiological processes or diseases [1]. Many cell-based assay strategies have been developed to identify GPCR-targeted drugs with more biologically relevant data. Since typical cell-based assays are performed in the microtiter wells and it allows only one type of receptor for each well, multiplex cellular assay technologies have emerged to run high-throughput compound screening with over several hundreds of GPCRs. -
Molecular Mechanisms Involved Involved in the Interaction Effects of HCV and Ethanol on Liver Cirrhosis
Virginia Commonwealth University VCU Scholars Compass Theses and Dissertations Graduate School 2010 Molecular Mechanisms Involved Involved in the Interaction Effects of HCV and Ethanol on Liver Cirrhosis Ryan Fassnacht Virginia Commonwealth University Follow this and additional works at: https://scholarscompass.vcu.edu/etd Part of the Physiology Commons © The Author Downloaded from https://scholarscompass.vcu.edu/etd/2246 This Thesis is brought to you for free and open access by the Graduate School at VCU Scholars Compass. It has been accepted for inclusion in Theses and Dissertations by an authorized administrator of VCU Scholars Compass. For more information, please contact [email protected]. Ryan C. Fassnacht 2010 All Rights Reserved Molecular Mechanisms Involved in the Interaction Effects of HCV and Ethanol on Liver Cirrhosis A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science at Virginia Commonwealth University. by Ryan Christopher Fassnacht, B.S. Hampden Sydney University, 2005 M.S. Virginia Commonwealth University, 2010 Director: Valeria Mas, Ph.D., Associate Professor of Surgery and Pathology Division of Transplant Department of Surgery Virginia Commonwealth University Richmond, Virginia July 9, 2010 Acknowledgement The Author wishes to thank his family and close friends for their support. He would also like to thank the members of the molecular transplant team for their help and advice. This project would not have been possible with out the help of Dr. Valeria Mas and her endearing -
Supplemental Table 1 Enriched Genes in Cortical Astrocytes from Aged
Supplemental Table 1 Enriched genes in cortical astrocytes from aged and young-adult mice * Genes were present in the astrocyte module from the WGCNA analysis, and contains astrocyte enriched genes compared to microglia and oligodendrocytes # = Fold change of aged astrocyte expression over the average expression of all analyzed samples (microglia, astrocytes: young, old, with and without myelin contamination) $ ; aged = genes only present in the aged astrocyte top 1000 list (used to compare with lists from Cahoy, Lovatt, Doyle; see Fig. 4B), all = genes present in all astrocyte top 1000 lists Gene Symbol* Aged astr. (log2) Young astr.(log2) FC (aged/ aver.)# Location Ptprz1 15.37 15.02 18.76 Plasma Membrane Slc7a10 14.49 14.44 18.28 Plasma Membrane Gjb6 15.13 14.42 18.18 Plasma Membrane Dclk1 14.63 14.28 17.18 unknown Hes5 15.69 15.55 16.94 Nucleus Fgfr3 15.27 14.46 16.54 Plasma Membrane Entpd2 13.85 13.56 15.92 Cytoplasm Grin2c 14.93 14.87 15.75 Plasma Membrane Slc1a2 15.51 15.39 15.58 Plasma Membrane Fjx1 14.36 13.98 14.52 Extracellular Space Slc6a1 14.20 14.16 14.47 Plasma Membrane Kcnk1 12.93 13.49 14.43 Plasma Membrane Ppap2b 16.16 16.10 14.37 Plasma Membrane Fam20a 14.48 14.72 14.00 Extracellular Space Dbx2 13.68 13.32 13.99 Nucleus Itih3 13.93 13.93 13.94 Extracellular Space Htra1 17.12 16.91 13.92 Extracellular Space Atp1a2 14.59 14.48 13.73 Plasma Membrane Scg3 15.71 15.72 13.68 Extracellular Space F3 15.59 15.08 13.51 Plasma Membrane Mmd2 14.22 14.60 13.50 unknown Nrcam 13.73 13.88 13.47 Plasma Membrane Cldn10a 13.37 13.57 13.46 -
Neurotensin Activates Gabaergic Interneurons in the Prefrontal Cortex
The Journal of Neuroscience, February 16, 2005 • 25(7):1629–1636 • 1629 Behavioral/Systems/Cognitive Neurotensin Activates GABAergic Interneurons in the Prefrontal Cortex Kimberly A. Petrie,1 Dennis Schmidt,1 Michael Bubser,1 Jim Fadel,1 Robert E. Carraway,2 and Ariel Y. Deutch1 1Departments of Pharmacology and Psychiatry, Vanderbilt University Medical Center, Nashville, Tennessee 37212, and 2Department of Physiology, University of Massachusetts Medical Center, Worcester, Massachusetts 01655 Converging data suggest a dysfunction of prefrontal cortical GABAergic interneurons in schizophrenia. Morphological and physiological studies indicate that cortical GABA cells are modulated by a variety of afferents. The peptide transmitter neurotensin may be one such modulator of interneurons. In the rat prefrontal cortex (PFC), neurotensin is exclusively localized to dopamine axons and has been suggested to be decreased in schizophrenia. However, the effects of neurotensin on cortical interneurons are poorly understood. We used in vivo microdialysis in freely moving rats to assess whether neurotensin regulates PFC GABAergic interneurons. Intra-PFC administra- tion of neurotensin concentration-dependently increased extracellular GABA levels; this effect was impulse dependent, being blocked by treatment with tetrodotoxin. The ability of neurotensin to increase GABA levels in the PFC was also blocked by pretreatment with 2-[1-(7-chloro-4-quinolinyl)-5-(2,6-dimethoxyphenyl)pyrazole-3-yl)carbonylamino]tricyclo(3.3.1.1.3.7)decan-2-carboxylic acid (SR48692), a high-affinity neurotensin receptor 1 (NTR1) antagonist. This finding is consistent with our observation that NTR1 was localized to GABAergic interneurons in the PFC, particularly parvalbumin-containing interneurons. Because neurotensin is exclusively localized to dopamine axons in the PFC, we also determined whether neurotensin plays a role in the ability of dopamine agonists to increase extracellular GABA levels. -
Serum Levels of Spexin and Kisspeptin Negatively Correlate with Obesity and Insulin Resistance in Women
Physiol. Res. 67: 45-56, 2018 https://doi.org/10.33549/physiolres.933467 Serum Levels of Spexin and Kisspeptin Negatively Correlate With Obesity and Insulin Resistance in Women P. A. KOŁODZIEJSKI1, E. PRUSZYŃSKA-OSZMAŁEK1, E. KOREK4, M. SASSEK1, D. SZCZEPANKIEWICZ1, P. KACZMAREK1, L. NOGOWSKI1, P. MAĆKOWIAK1, K. W. NOWAK1, H. KRAUSS4, M. Z. STROWSKI2,3 1Department of Animal Physiology and Biochemistry, Poznan University of Life Sciences, Poznan, Poland, 2Department of Hepatology and Gastroenterology & The Interdisciplinary Centre of Metabolism: Endocrinology, Diabetes and Metabolism, Charité-University Medicine Berlin, Berlin, Germany, 3Department of Internal Medicine, Park-Klinik Weissensee, Berlin, Germany, 4Department of Physiology, Karol Marcinkowski University of Medical Science, Poznan, Poland Received August 18, 2016 Accepted June 19, 2017 On-line November 10, 2017 Summary Corresponding author Spexin (SPX) and kisspeptin (KISS) are novel peptides relevant in P. A. Kolodziejski, Department of Animal Physiology and the context of regulation of metabolism, food intake, puberty and Biochemistry, Poznan University of Life Sciences, Wolynska Street reproduction. Here, we studied changes of serum SPX and KISS 28, 60-637 Poznan, Poland. E-mail: [email protected] levels in female non-obese volunteers (BMI<25 kg/m2) and obese patients (BMI>35 kg/m2). Correlations between SPX or Introduction KISS with BMI, McAuley index, QUICKI, HOMA IR, serum levels of insulin, glucagon, leptin, adiponectin, orexin-A, obestatin, Kisspeptin (KISS) and spexin (SPX) are peptides ghrelin and GLP-1 were assessed. Obese patients had lower SPX involved in regulation of body weight, metabolism and and KISS levels as compared to non-obese volunteers (SPX: sexual functions. In 2014, Kim and coworkers showed that 4.48±0.19 ng/ml vs. -
Expression of Melatonin Receptors 1A/1B, Calmodulin and Estrogen Receptor 2 in Deep Paravertebral Muscles Revisited
MOLECULAR MEDICINE REPORTS 14: 5719-5724, 2016 Etiopathogenesis of adolescent idiopathic scoliosis: Expression of melatonin receptors 1A/1B, calmodulin and estrogen receptor 2 in deep paravertebral muscles revisited JOSEF ZAMECNIK1*, LENKA KRSKOVA1*, JAROMIR HACEK1, IVANA STETKAROVA2 and MARTIN KRBEC3 1Department of Pathology and Molecular Medicine, 2nd Faculty of Medicine, Charles University in Prague and University Hospital Motol, 15006 Prague; 2Department of Neurology, Charles University; 3Department of Orthopedics and Traumatology, 3rd Faculty of Medicine, Charles University in Prague and University Hospital Královské Vinohrady, 10034 Prague, Czech Republic Received October 28, 2015; Accepted October 11, 2016 DOI: 10.3892/mmr.2016.5927 Abstract. The pathogenesis of adolescent idiopathic scoliosis addition, no difference in expression was detected between the (AIS), including the associated local changes in deep para- patients with AIS and the controls. With regards to MTNR1A vertebral muscles, is poorly understood. The asymmetric and MTNR1B, their expression was very weak in paravertebral expression of several molecules involved in the melatonin muscles, and in the majority of cases their expression could signaling pathway, including melatonin receptors 1A/1B not be detected by repeated RT-qPCR analysis. Therefore, (MTNR1A/MTNR1B), estrogen receptor 2 (ESR2) and these data do not support the previously suggested role of the calmodulin (CALM1), has previously been suggested to be asymmetric expression of molecules involved in the melatonin associated with AIS. However, this hypothesis is based on signaling pathway in deep paravertebral muscles in the patho- single studies in which the data were obtained by different genesis of AIS. methodological approaches. Therefore, to evaluate the symmetry of the mRNA expression levels of these molecules, Introduction 18 patients with AIS and 10 non-scoliotic controls were enrolled in the present study. -
The Evolutionary Origin of the Vasopressin/V2-Type Receptor/ Aquaporin Axis and the Urine-Concentrating Mechanism
Endocrine (2012) 42:63–68 DOI 10.1007/s12020-012-9634-y MINI REVIEW The evolutionary origin of the vasopressin/V2-type receptor/ aquaporin axis and the urine-concentrating mechanism Kristian Vinter Juul Received: 5 December 2011 / Accepted: 8 February 2012 / Published online: 29 February 2012 Ó Springer Science+Business Media, LLC 2012 Abstract In this mini-review, current evidence for how circadian regulation of urine volume and osmolality that the vasopressin/V2-type receptor/aquaporin axis developed may lead to enuresis and nocturia. co-evolutionary as a crucial part of the urine-concentrating mechanism will be presented. The present-day human Keywords Arginine vasopressin Á V2-R Á AQPs Á kidney, allowing the concentration of urine up to a maxi- Evolution mal osmolality around 1200 mosmol kg-1—or urine to plasma osmolality ratio around 4—with essentially no sodium secreted is the result of up to 3 billion years evo- Introduction lution. Moving from aquatic to terrestrial habitats required profound changes in kidney morphology, most notable the The evolutionary process that ultimately lead to the loops of Henle modifying the kidneys from basically a development of the urine-concentrating mechanism was water excretory system to a water conserving system. originally proposed by Homer Smith, the ‘Father of Renal Vasopressin-like molecules has during the evolution played Physiology’ [1], and is now generally accepted: First cru- a significant role in body fluid homeostasis, more specifi- cial step was salt water vertebrates’ simple nephron cally, the osmolality of body liquids by controlling the developing into nephrons with large glomerular capillaries elimination/reabsorption of fluid trough stimulating and proximal and distal tubules in fresh water vertebrates, V2-type receptors to mobilize aquaporin water channels in allowing the excretion of the vast amounts of excess water the renal collector tubules. -
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.