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Kotliar IB, Ceraudo E, Kemelmakher-Liben K, Oren DA, Lorenzen E, Dodig-Crnković T, Horioka-Duplix M, Huber T, Schwenk JM, Sakmar TP. Itch receptor MRGPRX4 interacts with the receptor activity-modifying proteins. J Biol Chem 2023; 299:104664. [PMID: 37003505 PMCID: PMC10165273 DOI: 10.1016/j.jbc.2023.104664] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 03/22/2023] [Accepted: 03/24/2023] [Indexed: 04/03/2023] Open
Abstract
Cholestatic itch is a severe and debilitating symptom in liver diseases with limited treatment options. The class A G protein-coupled receptor (GPCR) Mas-related GPCR subtype X4 (MRGPRX4) has been identified as a receptor for bile acids, which are potential cholestatic pruritogens. An increasing number of GPCRs have been shown to interact with receptor activity-modifying proteins (RAMPs), which can modulate different aspects of GPCR biology. Using a combination of multiplexed immunoassay and proximity ligation assay, we show that MRGPRX4 interacts with RAMPs. The interaction of MRGPRX4 with RAMP2, but not RAMP1 or 3, causes attenuation of basal and agonist-dependent signaling, which correlates with a decrease of MRGPRX4 cell surface expression as measured using a quantitative NanoBRET pulse-chase assay. Finally, we use AlphaFold Multimer to predict the structure of the MRGPRX4-RAMP2 complex. The discovery that RAMP2 regulates MRGPRX4 may have direct implications for future drug development for cholestatic itch.
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Affiliation(s)
- Ilana B Kotliar
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, New York, New York, USA; Tri-Institutional PhD Program in Chemical Biology, New York, New York, USA
| | - Emilie Ceraudo
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, New York, New York, USA
| | - Kevin Kemelmakher-Liben
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, New York, New York, USA
| | - Deena A Oren
- Structural Biology Resource Center, The Rockefeller University, New York, New York, USA
| | - Emily Lorenzen
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, New York, New York, USA
| | - Tea Dodig-Crnković
- Science for Life Laboratory, Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Solna, Sweden
| | - Mizuho Horioka-Duplix
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, New York, New York, USA
| | - Thomas Huber
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, New York, New York, USA
| | - Jochen M Schwenk
- Science for Life Laboratory, Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Solna, Sweden
| | - Thomas P Sakmar
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, New York, New York, USA; Department of Neurobiology, Care Sciences and Society, Section for Neurogeriatrics, Karolinska Institutet, Solna, Sweden.
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Kotliar IB, Lorenzen E, Schwenk JM, Hay DL, Sakmar TP. Elucidating the Interactome of G Protein-Coupled Receptors and Receptor Activity-Modifying Proteins. Pharmacol Rev 2023; 75:1-34. [PMID: 36757898 PMCID: PMC9832379 DOI: 10.1124/pharmrev.120.000180] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Accepted: 09/27/2022] [Indexed: 12/13/2022] Open
Abstract
G protein-coupled receptors (GPCRs) are known to interact with several other classes of integral membrane proteins that modulate their biology and pharmacology. However, the extent of these interactions and the mechanisms of their effects are not well understood. For example, one class of GPCR-interacting proteins, receptor activity-modifying proteins (RAMPs), comprise three related and ubiquitously expressed single-transmembrane span proteins. The RAMP family was discovered more than two decades ago, and since then GPCR-RAMP interactions and their functional consequences on receptor trafficking and ligand selectivity have been documented for several secretin (class B) GPCRs, most notably the calcitonin receptor-like receptor. Recent bioinformatics and multiplexed experimental studies suggest that GPCR-RAMP interactions might be much more widespread than previously anticipated. Recently, cryo-electron microscopy has provided high-resolution structures of GPCR-RAMP-ligand complexes, and drugs have been developed that target GPCR-RAMP complexes. In this review, we provide a summary of recent advances in techniques that allow the discovery of GPCR-RAMP interactions and their functional consequences and highlight prospects for future advances. We also provide an up-to-date list of reported GPCR-RAMP interactions based on a review of the current literature. SIGNIFICANCE STATEMENT: Receptor activity-modifying proteins (RAMPs) have emerged as modulators of many aspects of G protein-coupled receptor (GPCR)biology and pharmacology. The application of new methodologies to study membrane protein-protein interactions suggests that RAMPs interact with many more GPCRs than had been previously known. These findings, especially when combined with structural studies of membrane protein complexes, have significant implications for advancing GPCR-targeted drug discovery and the understanding of GPCR pharmacology, biology, and regulation.
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Affiliation(s)
- Ilana B Kotliar
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, New York, New York (I.B.K., E.L., T.P.S.); Tri-Institutional PhD Program in Chemical Biology, New York, New York (I.B.K.); Science for Life Laboratory, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH-Royal Institute of Technology, Solna, Sweden (J.M.S.); Department of Pharmacology and Toxicology, School of Biomedical Sciences, Division of Health Sciences, University of Otago, Dunedin, New Zealand (D.L.H.); and Department of Neurobiology, Care Sciences and Society (NVS), Division for Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet, Solna, Sweden (T.P.S.)
| | - Emily Lorenzen
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, New York, New York (I.B.K., E.L., T.P.S.); Tri-Institutional PhD Program in Chemical Biology, New York, New York (I.B.K.); Science for Life Laboratory, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH-Royal Institute of Technology, Solna, Sweden (J.M.S.); Department of Pharmacology and Toxicology, School of Biomedical Sciences, Division of Health Sciences, University of Otago, Dunedin, New Zealand (D.L.H.); and Department of Neurobiology, Care Sciences and Society (NVS), Division for Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet, Solna, Sweden (T.P.S.)
| | - Jochen M Schwenk
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, New York, New York (I.B.K., E.L., T.P.S.); Tri-Institutional PhD Program in Chemical Biology, New York, New York (I.B.K.); Science for Life Laboratory, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH-Royal Institute of Technology, Solna, Sweden (J.M.S.); Department of Pharmacology and Toxicology, School of Biomedical Sciences, Division of Health Sciences, University of Otago, Dunedin, New Zealand (D.L.H.); and Department of Neurobiology, Care Sciences and Society (NVS), Division for Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet, Solna, Sweden (T.P.S.)
| | - Debbie L Hay
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, New York, New York (I.B.K., E.L., T.P.S.); Tri-Institutional PhD Program in Chemical Biology, New York, New York (I.B.K.); Science for Life Laboratory, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH-Royal Institute of Technology, Solna, Sweden (J.M.S.); Department of Pharmacology and Toxicology, School of Biomedical Sciences, Division of Health Sciences, University of Otago, Dunedin, New Zealand (D.L.H.); and Department of Neurobiology, Care Sciences and Society (NVS), Division for Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet, Solna, Sweden (T.P.S.)
| | - Thomas P Sakmar
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, New York, New York (I.B.K., E.L., T.P.S.); Tri-Institutional PhD Program in Chemical Biology, New York, New York (I.B.K.); Science for Life Laboratory, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH-Royal Institute of Technology, Solna, Sweden (J.M.S.); Department of Pharmacology and Toxicology, School of Biomedical Sciences, Division of Health Sciences, University of Otago, Dunedin, New Zealand (D.L.H.); and Department of Neurobiology, Care Sciences and Society (NVS), Division for Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet, Solna, Sweden (T.P.S.)
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3
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Velázquez-Villegas LA, Tovar-Palacio C, Palacios-González B, Torres N, Tovar AR, Díaz-Villaseñor A. Recycling of glucagon receptor to plasma membrane increases in adipocytes of obese rats by soy protein; implications for glucagon resistance. Mol Nutr Food Res 2017; 61. [DOI: 10.1002/mnfr.201700116] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 05/24/2017] [Accepted: 06/14/2017] [Indexed: 12/31/2022]
Affiliation(s)
- Laura A. Velázquez-Villegas
- Departmento de Fisiología de la Nutrición; Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán; Mexico City Mexico
| | - Claudia Tovar-Palacio
- Departmento de Nefrología y Metabolismo Mineral; Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán; Mexico City Mexico
| | - Berenice Palacios-González
- Departmento de Fisiología de la Nutrición; Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán; Mexico City Mexico
| | - Nimbe Torres
- Departmento de Fisiología de la Nutrición; Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán; Mexico City Mexico
| | - Armando R. Tovar
- Departmento de Fisiología de la Nutrición; Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán; Mexico City Mexico
| | - Andrea Díaz-Villaseñor
- Departmento de Fisiología de la Nutrición; Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán; Mexico City Mexico
- Departmento de Medicina Genómica y Toxicología Ambiental; Instituto de Investigaciones Biomédicas; Universidad Nacional Autónoma de México; Mexico City Mexico
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Sekiguchi T, Shiraishi A, Satake H, Kuwasako K, Takahashi H, Sato M, Urata M, Wada S, Endo M, Ikari T, Hattori A, Srivastav AK, Suzuki N. Calcitonin-typical suppression of osteoclastic activity by amphioxus calcitonin superfamily peptides and insights into the evolutionary conservation and diversity of their structures. Gen Comp Endocrinol 2017; 246:294-300. [PMID: 28062302 DOI: 10.1016/j.ygcen.2017.01.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 12/05/2016] [Accepted: 01/02/2017] [Indexed: 01/27/2023]
Abstract
Calcitonin (CT) is a hormone that decreases serum calcium level by suppressing osteoclastic activity in the vertebrate bone. In vertebrates, the structure-function relationship of CTs has been studied extensively. We recently identified three CT superfamily peptides, Bf-CTFP1 to 3, and clarified the molecular and functional characteristics of their receptor and receptor activity-modifying protein in amphioxus, Branchiostoma floridae. However, the CT activity of Bf-CTFPs has yet to be investigated. In the present study, a functional analysis of Bf-CTFPs was performed using goldfish scales having both osteoclasts and osteoblasts. All Bf-CTFPs suppressed osteoclastic activity via a goldfish CT receptor. Although the primary amino acid sequences of the Bf-CTFPs showed low sequence similarity to vertebrate CTs, Bf-CTFP1 to 3 share three amino acids, Thr25, Thr27, and Pro32-NH2, that are required for receptor binding, with salmon CT. Moreover, homology model analysis revealed that the Bf-CTFPs form alpha-helical structures. The alpha-helical position and length of Bf-CTFP1 and 2 were conserved with those of a highly potent ligand, teleost CT. Interestingly, the composition of the alpha-helix of Bf-CTFP3 differed from those of teleost CT, despite that the action of Bf-CTFP3 on goldfish scales was the same as that of Bf-CTFP1 and 2. Collectively, the present study provides new insights into the structure-function relationship of CT and its functional evolution in chordates.
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Affiliation(s)
- Toshio Sekiguchi
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Division of Marine Environmental Studies, Kanazawa University, Housu-gun, Ishikawa 927-0553, Japan
| | - Akira Shiraishi
- Bioorganic Research Institute, Suntory Foundation for Life Sciences, 8-1-1, Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Honoo Satake
- Bioorganic Research Institute, Suntory Foundation for Life Sciences, 8-1-1, Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Kenji Kuwasako
- Frontier Science Research Center, University of Miyazaki, Miyazaki, Miyazaki 889-1692, Japan
| | - Hiroki Takahashi
- National Institute for Basic Biology, Laboratory of Morphogenesis, 38 Nishigonaka Myodaiji, Okazaki 444-8585, Japan
| | - Masayuki Sato
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Division of Marine Environmental Studies, Kanazawa University, Housu-gun, Ishikawa 927-0553, Japan
| | - Makoto Urata
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Division of Marine Environmental Studies, Kanazawa University, Housu-gun, Ishikawa 927-0553, Japan; Institute of Noto SATOUMI Education and Studies, Noto-cho, Ishikawa 927-0553, Japan
| | - Shuichi Wada
- Department of Animal Bioscience, Faculty of Bioscience, Nagahama Institute of Bio-Science and Technology, Nagahama, Shiga 526-0829, Japan
| | - Masato Endo
- Department of Marine Biosciences, Division of Marine Science, Tokyo University of Marine Science and Technology, Minato-ku, Tokyo 108-8477, Japan
| | - Takahiro Ikari
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Division of Marine Environmental Studies, Kanazawa University, Housu-gun, Ishikawa 927-0553, Japan
| | - Atsuhiko Hattori
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba 272-0827, Japan
| | - Ajai K Srivastav
- Department of Zoology, D.D.U. Gorakhpur University, Gorakhpur 273-009, India
| | - Nobuo Suzuki
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Division of Marine Environmental Studies, Kanazawa University, Housu-gun, Ishikawa 927-0553, Japan.
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5
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Lindsley CW, Emmitte KA, Hopkins CR, Bridges TM, Gregory KJ, Niswender CM, Conn PJ. Practical Strategies and Concepts in GPCR Allosteric Modulator Discovery: Recent Advances with Metabotropic Glutamate Receptors. Chem Rev 2016; 116:6707-41. [PMID: 26882314 PMCID: PMC4988345 DOI: 10.1021/acs.chemrev.5b00656] [Citation(s) in RCA: 135] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Allosteric modulation of GPCRs has initiated a new era of basic and translational discovery, filled with therapeutic promise yet fraught with caveats. Allosteric ligands stabilize unique conformations of the GPCR that afford fundamentally new receptors, capable of novel pharmacology, unprecedented subtype selectivity, and unique signal bias. This review provides a comprehensive overview of the basics of GPCR allosteric pharmacology, medicinal chemistry, drug metabolism, and validated approaches to address each of the major challenges and caveats. Then, the review narrows focus to highlight recent advances in the discovery of allosteric ligands for metabotropic glutamate receptor subtypes 1-5 and 7 (mGlu1-5,7) highlighting key concepts ("molecular switches", signal bias, heterodimers) and practical solutions to enable the development of tool compounds and clinical candidates. The review closes with a section on late-breaking new advances with allosteric ligands for other GPCRs and emerging data for endogenous allosteric modulators.
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Affiliation(s)
- Craig W. Lindsley
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
- Department of Chemistry, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
| | - Kyle A. Emmitte
- Department of Pharmaceutical Sciences, UNT System College of Pharmacy, University of North Texas Health Science Center, 3500 Camp Bowie Boulevard, Fort Worth, Texas 76107, United States
| | - Corey R. Hopkins
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
| | - Thomas M. Bridges
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
| | - Karen J. Gregory
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville VIC 3052, Australia
| | - Colleen M. Niswender
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
- Vanderbilt Kennedy Center, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
| | - P. Jeffrey Conn
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
- Vanderbilt Kennedy Center, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
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Sekiguchi T, Kuwasako K, Ogasawara M, Takahashi H, Matsubara S, Osugi T, Muramatsu I, Sasayama Y, Suzuki N, Satake H. Evidence for Conservation of the Calcitonin Superfamily and Activity-regulating Mechanisms in the Basal Chordate Branchiostoma floridae: INSIGHTS INTO THE MOLECULAR AND FUNCTIONAL EVOLUTION IN CHORDATES. J Biol Chem 2015; 291:2345-56. [PMID: 26644465 DOI: 10.1074/jbc.m115.664003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Indexed: 11/06/2022] Open
Abstract
The calcitonin (CT)/CT gene-related peptide (CGRP) family is conserved in vertebrates. The activities of this peptide family are regulated by a combination of two receptors, namely the calcitonin receptor (CTR) and the CTR-like receptor (CLR), and three receptor activity-modifying proteins (RAMPs). Furthermore, RAMPs act as escort proteins by translocating CLR to the cell membrane. Recently, CT/CGRP family peptides have been identified or inferred in several invertebrates. However, the molecular characteristics and relevant functions of the CTR/CLR and RAMPs in invertebrates remain unclear. In this study, we identified three CT/CGRP family peptides (Bf-CTFPs), one CTR/CLR-like receptor (Bf-CTFP-R), and three RAMP-like proteins (Bf-RAMP-LPs) in the basal chordate amphioxus (Branchiostoma floridae). The Bf-CTFPs were shown to possess an N-terminal circular region typical of the CT/CGRP family and a C-terminal Pro-NH2. The Bf-CTFP genes were expressed in the central nervous system and in endocrine cells of the midgut, indicating that Bf-CTFPs serve as brain and/or gut peptides. Cell surface expression of the Bf-CTFP-R was enhanced by co-expression with each Bf-RAMP-LP. Furthermore, Bf-CTFPs activated Bf-CTFP-R·Bf-RAMP-LP complexes, resulting in cAMP accumulation. These results confirmed that Bf-RAMP-LPs, like vertebrate RAMPs, are prerequisites for the function and translocation of the Bf-CTFP-R. The relative potencies of the three peptides at each receptor were similar. Bf-CTFP2 was a potent ligand at all receptors in cAMP assays. Bf-RAMP-LP effects on ligand potency order were distinct to vertebrate CGRP/adrenomedullin/amylin receptors. To the best of our knowledge, this is the first molecular and functional characterization of an authentic invertebrate CT/CGRP family receptor and RAMPs.
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Affiliation(s)
- Toshio Sekiguchi
- From the Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University, Housu-gun, Ishikawa 927-0553, Japan,
| | - Kenji Kuwasako
- the Frontier Science Research Center, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, Miyazaki 889-1692, Japan
| | - Michio Ogasawara
- the Department of Nanobiology, Graduate School of Advanced Integration Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Hiroki Takahashi
- the Laboratory of Morphogenesis, National Institute for Basic Biology, 38 Nishigonaka Myodaiji, Okazaki 444-8585, Japan
| | - Shin Matsubara
- the Bioorganic Research Institute, Suntory Foundation for Life Sciences, 8-1-1, Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan, and
| | - Tomohiro Osugi
- the Bioorganic Research Institute, Suntory Foundation for Life Sciences, 8-1-1, Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan, and
| | - Ikunobu Muramatsu
- the Department of Pharmacology, School of Medicine, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
| | - Yuichi Sasayama
- From the Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University, Housu-gun, Ishikawa 927-0553, Japan
| | - Nobuo Suzuki
- From the Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University, Housu-gun, Ishikawa 927-0553, Japan
| | - Honoo Satake
- the Bioorganic Research Institute, Suntory Foundation for Life Sciences, 8-1-1, Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan, and
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7
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Calcium-Sensing Receptor. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2015; 132:127-50. [DOI: 10.1016/bs.pmbts.2015.02.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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8
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Chen DN, Ma YT, Liu H, Zhou QY, Li JD. Functional rescue of Kallmann syndrome-associated prokineticin receptor 2 (PKR2) mutants deficient in trafficking. J Biol Chem 2014; 289:15518-26. [PMID: 24753254 DOI: 10.1074/jbc.m114.556381] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Mutations in the G protein-coupled prokineticin receptor 2 (PKR2) are known to cause Kallmann syndrome and idiopathic hypogonadotropic hypogonadism manifesting with delayed puberty and infertility. Some of the mutant receptors are not routed to the cell surface; instead, they are trapped in the cellular secretory pathway. The cell-permeant agonists/antagonists have been used to rescue some membrane receptors that are not targeted onto the cell membrane. Here, we chose three disease-associated mutations (W178S, G234D, and P290S), which all resulted in retention of PKR2 intracellularly. We show that a small molecule PKR2 antagonist (A457) dramatically increased cell surface expression and rescued the function of P290S PKR2, but had no effect on W178S and G234D PKR2. Furthermore, we also tested chemical chaperone glycerol on the cell surface expression and function of PKR2 mutants. Treatment with 10% glycerol significantly increased the cell surface expression and signaling of P290S and W178S PKR2. These data demonstrate that some Kallmann syndrome-associated, intracellularly retained mutant PKR2 receptors can be functionally rescued, suggesting a potential treatment strategy for patients bearing such mutations.
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Affiliation(s)
- Dan-Na Chen
- From the State Key Laboratory of Medical Genetics, Central South University, Changsha, Hunan 410078, China, the Department of Basic Medical Sciences, Changsha Medical University, Changsha, Hunan 410219, China
| | - Yan-Tao Ma
- From the State Key Laboratory of Medical Genetics, Central South University, Changsha, Hunan 410078, China
| | - Huadie Liu
- From the State Key Laboratory of Medical Genetics, Central South University, Changsha, Hunan 410078, China
| | - Qun-Yong Zhou
- the Department of Pharmacology, University of California, Irvine, California 92697
| | - Jia-Da Li
- From the State Key Laboratory of Medical Genetics, Central South University, Changsha, Hunan 410078, China, the Department of Pharmacology, Hubei University of Science and Technology, 88 Xianning Road, Xianning, Hubei 437100, China, and
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9
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Cervia D, Casini G. The Neuropeptide Systems and their Potential Role in the Treatment of Mammalian Retinal Ischemia: A Developing Story. Curr Neuropharmacol 2013; 11:95-101. [PMID: 23814541 PMCID: PMC3580795 DOI: 10.2174/157015913804999423] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 07/30/2012] [Accepted: 08/09/2012] [Indexed: 12/23/2022] Open
Abstract
The multiplicity of peptidergic receptors and of the transduction pathways they activate offers the possibility of important advances in the development of specific drugs for clinical treatment of central nervous system disorders. Among them, retinal ischemia is a common clinical entity and, due to relatively ineffective treatment, remains a common cause of visual impairment and blindness. Ischemia is a primary cause of neuronal death, and it can be considered as a sort of final common pathway in retinal diseases leading to irreversible morphological damage and vision loss. Neuropeptides and their receptors are widely expressed in mammalian retinas, where they exert multifaceted functions both during development and in the mature animal. In particular, in recent years somatostatin and pituitary adenylate cyclase activating peptide have been reported to be highly protective against retinal cell death caused by ischemia, while data on opioid peptides, angiotensin II, and other peptides have also been published. This review provides a rationale for harnessing the peptidergic receptors as a potential target against retinal neuronal damages which occur during ischemic retinopathies.
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Affiliation(s)
- D Cervia
- Department for Innovation in Biological, Agro-food and Forest systems (DIBAF), University of Tuscia, Viterbo, Italy
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10
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Lenhart PM, Broselid S, Barrick CJ, Leeb-Lundberg LF, Caron KM. G-protein-coupled receptor 30 interacts with receptor activity-modifying protein 3 and confers sex-dependent cardioprotection. J Mol Endocrinol 2013; 51:191-202. [PMID: 23674134 PMCID: PMC3724340 DOI: 10.1530/jme-13-0021] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Receptor activity-modifying protein 3 (RAMP3) is a single-pass transmembrane protein known to interact with and affect the trafficking of several G-protein-coupled receptors (GPCRs). We sought to determine whether RAMP3 interacts with GPR30, also known as G-protein-coupled estrogen receptor 1. GPR30 is a GPCR that binds estradiol and has important roles in cardiovascular and endocrine physiology. Using bioluminescence resonance energy transfer titration studies, co-immunoprecipitation, and confocal microscopy, we show that GPR30 and RAMP3 interact. Furthermore, the presence of GPR30 leads to increased expression of RAMP3 at the plasma membrane in HEK293 cells. In vivo, there are marked sex differences in the subcellular localization of GPR30 in cardiac cells, and the hearts of Ramp3(-/-) mice also show signs of GPR30 mislocalization. To determine whether this interaction might play a role in cardiovascular disease, we treated Ramp3(+)(/)(+) and Ramp3(-/-) mice on a heart disease-prone genetic background with G-1, a specific agonist for GPR30. Importantly, this in vivo activation of GPR30 resulted in a significant reduction in cardiac hypertrophy and perivascular fibrosis that is both RAMP3 and sex dependent. Our results demonstrate that GPR30-RAMP3 interaction has functional consequences on the localization of these proteins both in vitro and in vivo and that RAMP3 is required for GPR30-mediated cardioprotection.
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Affiliation(s)
- Patricia M. Lenhart
- Department of Cell Biology & Physiology, The University of North Carolina, Chapel Hill, North Carolina, USA 27599
| | - Stefan Broselid
- Department of Experimental Medical Science, Lund University, SE-22184 Lund, Sweden
| | - Cordelia J. Barrick
- Department of Cell Biology & Physiology, The University of North Carolina, Chapel Hill, North Carolina, USA 27599
| | | | - Kathleen M. Caron
- Department of Cell Biology & Physiology, The University of North Carolina, Chapel Hill, North Carolina, USA 27599
- To whom correspondence should be addressed: Kathleen M. Caron, Department of Cell Biology & Physiology, CB # 7545, 6340B MBRB, 111 Mason Farm Road, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599. Tel: 919-966-5215, Fax: 919-966-5230.
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Emery AC. Catecholamine receptors: prototypes for GPCR-based drug discovery. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2013; 68:335-56. [PMID: 24054152 DOI: 10.1016/b978-0-12-411512-5.00016-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Drugs acting at G protein-coupled receptors (GPCRs) constitute ~40% of those in current clinical use. GPCR-based drug discovery remains at the forefront of drug development, especially for new treatments for psychiatric illness and neurological disease. Here, the basic framework of GPCR signaling learned through the elucidation of catecholamine receptor signaling through G proteins and β-arrestins, and X-ray crystallographic structure determination is reviewed. In silico docking studies developed in tandem with confirmatory empirical data gathering from binding and signaling experiments have allowed this basic framework to be expanded to drug hunting through predictive in silico searching as well as high-throughput and high-content screening approaches. For efforts moving forward for the deployment of new GPCR-acting drugs, collaborative efforts between industry and government/academic research in target validation at the molecular and cellular levels have become progressively more common. Polypharmacological approaches have become increasingly available for learning more about the mechanisms of GPCR-targeted drugs, based on interaction not with a single, but with a wide range of GPCR targets. These approaches are likely to aid in drug repurposing efforts, yield valuable insight on the side effects of currently employed drugs, and allow for a clearer picture of the actual targets of "atypical" drugs used in a variety of therapeutic contexts.
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Affiliation(s)
- Andrew C Emery
- Section on Molecular Neuroscience, Laboratory of Cellular and Molecular Regulation, National Institute of Mental Health Intramural Research Program, Bethesda, Maryland, USA.
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