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In Silico Drug Repurposing Framework Predicts Repaglinide, Agomelatine and Protokylol as TRPV1 Modulators with Analgesic Activity. Pharmaceutics 2022; 14:pharmaceutics14122563. [PMID: 36559057 PMCID: PMC9781017 DOI: 10.3390/pharmaceutics14122563] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/16/2022] [Accepted: 11/18/2022] [Indexed: 11/25/2022] Open
Abstract
Pain is one of the most common symptoms experienced by patients. The use of current analgesics is limited by low efficacy and important side effects. Transient receptor potential vanilloid-1 (TRPV1) is a non-selective cation channel, activated by capsaicin, heat, low pH or pro-inflammatory agents. Since TRPV1 is a potential target for the development of novel analgesics due to its distribution and function, we aimed to develop an in silico drug repositioning framework to predict potential TRPV1 ligands among approved drugs as candidates for treating various types of pain. Structures of known TRPV1 agonists and antagonists were retrieved from ChEMBL databases and three datasets were established: agonists, antagonists and inactive molecules (pIC50 or pEC50 < 5 M). Structures of candidates for repurposing were retrieved from the DrugBank database. The curated active/inactive datasets were used to build and validate ligand-based predictive models using Bemis−Murcko structural scaffolds, plain ring systems, flexophore similarities and molecular descriptors. Further, molecular docking studies were performed on both active and inactive conformations of the TRPV1 channel to predict the binding affinities of repurposing candidates. Variables obtained from calculated scaffold-based activity scores, molecular descriptors criteria and molecular docking were used to build a multi-class neural network as an integrated machine learning algorithm to predict TRPV1 antagonists and agonists. The proposed predictive model had a higher accuracy for classifying TRPV1 agonists than antagonists, the ROC AUC values being 0.980 for predicting agonists, 0.972 for antagonists and 0.952 for inactive molecules. After screening the approved drugs with the validated algorithm, repaglinide (antidiabetic) and agomelatine (antidepressant) emerged as potential TRPV1 antagonists, and protokylol (bronchodilator) as an agonist. Further studies are required to confirm the predicted activity on TRPV1 and to assess the candidates’ efficacy in alleviating pain.
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Unal GO, Demirdas A, Nazıroglu M, Ovey IS. Agomelatine attenuates calcium signaling and apoptosis via the inhibition of TRPV1 channel in the hippocampal neurons of rats with chronic mild stress depression model. Behav Brain Res 2022; 434:114033. [DOI: 10.1016/j.bbr.2022.114033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 07/27/2022] [Accepted: 07/27/2022] [Indexed: 11/15/2022]
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Boutin JA, Witt-Enderby PA, Sotriffer C, Zlotos DP. Melatonin receptor ligands: A pharmaco-chemical perspective. J Pineal Res 2020; 69:e12672. [PMID: 32531076 DOI: 10.1111/jpi.12672] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/19/2020] [Accepted: 06/04/2020] [Indexed: 12/14/2022]
Abstract
Melatonin MT1 and MT2 receptor ligands have been vigorously explored for the last 4 decades. Inspection of approximately 80 publications in the field revealed that most melatonergic ligands were structural analogues of melatonin combining three essential features of the parent compound: an aromatic ring bearing a methoxy group and an amide side chain in a relative arrangement similar to that present in melatonin. While several series of MT2 -selective agents-agonists, antagonists, or partial agonists-were reported, the field was lacking MT1 -selective agents. Herein, we describe various approaches toward the development of melatonergic ligands, keeping in mind that most of the molecules/pharmacophores obtained were essentially melatonin copies, even though diverse tri- or tetra-cyclic compounds were explored. In addition to lack of structural diversity, only few studies examined the activity of the reported melatonergic ligands in vivo. Moreover, an extensive pharmacological characterization including biopharmaceutical stability, pharmacokinetic properties, specificity toward other major receptors to name a few remained scarce. For example, many of the antagonists described were not stable in vivo, were not selective for the melatonin receptor subtype of interest, and were not fully characterized from a pharmacological standpoint. Indeed, virtual screening of large compound libraries has led to the recent discovery of potent and selective melatonin receptor agonists and partial agonists of new chemotypes. Having said this, the melatonergic field is still lacking subtype-selective melatonin receptor antagonists "active" in vivo, which are critical to our understanding of melatonin and melatonin receptors' role in basic physiology and disease.
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MESH Headings
- Animals
- Humans
- Ligands
- Melatonin/chemistry
- Receptor, Melatonin, MT1/agonists
- Receptor, Melatonin, MT1/antagonists & inhibitors
- Receptor, Melatonin, MT1/chemistry
- Receptor, Melatonin, MT2/agonists
- Receptor, Melatonin, MT2/antagonists & inhibitors
- Receptor, Melatonin, MT2/chemistry
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Affiliation(s)
- Jean A Boutin
- Institut de Recherches Internationales SERVIER, Suresnes, France
| | - Paula A Witt-Enderby
- School of Pharmacy & Graduate School of Pharmaceutical, Administrative and Social Sciences, Duquesne University, Pittsburg, PA, USA
| | - Christoph Sotriffer
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Würzburg, Germany
| | - Darius P Zlotos
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, The German University in Cairo, New Cairo City, Egypt
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Chiral Recognition of Flexible Melatonin Receptor Ligands Induced by Conformational Equilibria. Molecules 2020; 25:molecules25184057. [PMID: 32899888 PMCID: PMC7570888 DOI: 10.3390/molecules25184057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 08/27/2020] [Accepted: 09/02/2020] [Indexed: 01/17/2023] Open
Abstract
N-anilinoethylamides are a class of melatoninergic agents with the aniline portion mimicking the indole ring of the natural ligand and the ethylamide chain reproducing that of melatonin. The simplest compound in this class, N-{2-[(3-methoxyphenyl)methylamino]ethyl}acetamide (UCM793), has nanomolar binding affinity for MT1 and MT2 membrane receptors. To explore the effect of chain conformation on receptor binding, a methyl group was inserted on the methylene alpha or beta to the amide nitrogen and conformational equilibria were investigated by NMR spectroscopy and molecular dynamics simulations. Receptor affinity was conserved only for the beta-methyl derivative, which also showed significant stereoselectivity, with the (S) enantiomer being the eutomer. Molecular dynamics simulations, validated by NMR spectroscopy, showed that the beta-methyl group affects the conformational preferences of the ethylamide chain. Docking into the receptor crystal structure provides a rationale for the observed chiral recognition, suggesting that the (S)-beta-methyl group favors the conformation that better fits the receptor binding site.
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5
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Dampening of neurotransmitter action: molecular similarity within the melatonin structure. Endocr Regul 2019; 52:199-207. [PMID: 31517615 DOI: 10.2478/enr-2018-0025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVES Melatonin initiates physiologic and therapeutic responses in various tissues through binding to poorly defined MT receptors regulated by G-proteins and purine nucleotides. Melatonin's interaction with other G-protein regulated receptors, including those of serotonin, is unclear. This study explores the potential for the interaction of melatonin with nucleotide and receptor ligand structures. METHODS The study uses a computational program to investigate relative molecular similarity by the comparative superimposition and quantitative fitting of molecular structures to adenine and guanine nucleotide templates. RESULTS A minimum energy melatonin conformer replicates the nucleotide fits of ligand structures that regulate Gαi and Gαq proteins via serotonin, dopamine, opioid, α-adrenoceptor, and muscarinic receptor classes. The same conformer also replicates the nucleotide fits of ligand structures regulating K+ and Ca2+ ion channels. The acyl-methoxy distance within the melatonin conformer matches a carbonyl-hydroxyl distance in guanine nucleotide. CONCLUSION Molecular similarity within the melatonin and ligand structures relates to the established effects of melatonin on cell receptors regulated by purine nucleotides in cell signal transduction processes. Pharmacologic receptor promiscuity may contribute to the widespread effects of melatonin.
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Sakurai M, Kihara N, Watanabe N, Ikari Y, Takata T. Synthesis of α-Aminocarbonyl Compounds via Hetero Diels–Alder Reaction. CHEM LETT 2018. [DOI: 10.1246/cl.170970] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Masayoshi Sakurai
- Department of Chemistry, Faculty of Science, Kanagawa University, 2946 Tsuchiya, Hiratsuka, Kanagawa 259-1293, Japan
| | - Nobuhiro Kihara
- Department of Chemistry, Faculty of Science, Kanagawa University, 2946 Tsuchiya, Hiratsuka, Kanagawa 259-1293, Japan
| | - Nobuhiro Watanabe
- Department of Applied Chemistry, Faculty of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Yoshihiro Ikari
- Department of Applied Chemistry, Faculty of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Toshikazu Takata
- Department of Polymer Chemistry, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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7
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Duroux R, Rami M, Landagaray E, Ettaoussi M, Caignard DH, Delagrange P, Melnyk P, Yous S. Synthesis and biological evaluation of new naphtho- and quinolinocyclopentane derivatives as potent melatoninergic (MT 1 /MT 2 ) and serotoninergic (5-HT 2C ) dual ligands. Eur J Med Chem 2017; 141:552-566. [DOI: 10.1016/j.ejmech.2017.10.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 10/08/2017] [Accepted: 10/09/2017] [Indexed: 01/02/2023]
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8
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Landagaray E, Ettaoussi M, Duroux R, Boutin JA, Caignard DH, Delagrange P, Melnyk P, Berthelot P, Yous S. Melatonergic ligands: Design, synthesis and pharmacological evaluation of novel series of naphthofuranic derivatives. Eur J Med Chem 2016; 109:360-70. [DOI: 10.1016/j.ejmech.2015.12.047] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 12/22/2015] [Accepted: 12/23/2015] [Indexed: 12/23/2022]
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9
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Landagaray E, Vaccher C, Yous S, Lipka E. Design of experiments for enantiomeric separation in supercritical fluid chromatography. J Pharm Biomed Anal 2016; 120:297-305. [DOI: 10.1016/j.jpba.2015.12.041] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 12/21/2015] [Accepted: 12/21/2015] [Indexed: 11/30/2022]
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10
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Legros C, Brasseur C, Delagrange P, Ducrot P, Nosjean O, Boutin JA. Alternative Radioligands for Investigating the Molecular Pharmacology of Melatonin Receptors. J Pharmacol Exp Ther 2016; 356:681-92. [PMID: 26759496 DOI: 10.1124/jpet.115.229989] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 01/11/2016] [Indexed: 12/15/2022] Open
Abstract
Melatonin exerts a variety of physiologic activities that are mainly relayed through the melatonin receptors MT1 and MT2 Low expressions of these receptors in tissues have led to widespread experimental use of the agonist 2-[(125)I]-iodomelatonin as a substitute for melatonin. We describe three iodinated ligands: 2-(2-[(2-iodo-4,5-dimethoxyphenyl)methyl]-4,5-dimethoxy phenyl) (DIV880) and (2-iodo-N-2-[5-methoxy-2-(naphthalen-1-yl)-1H-pyrrolo[3,2-b]pyridine-3-yl])acetamide (S70254), which are specific ligands at MT2 receptors, and N-[2-(5-methoxy-1H-indol-3-yl)ethyl]iodoacetamide (SD6), an analog of 2-[(125)I]-iodomelatonin with slightly different characteristics. Here, we further characterized these new ligands with regards to their molecular pharmacology. We performed binding experiments, saturation assays, association/dissociation rate measurements, and autoradiography using sheep and rat tissues and recombinant cell lines. Our results showed that [(125)I]-S70254 is receptor, and can be used with both cells and tissue. This radioligand can be used in autoradiography. Similarly, DIV880, a partial agonist [43% of melatonin on guanosine 5'-3-O-(thio)triphosphate binding assay], selective for MT2, can be used as a tool to selectively describe the pharmacology of this receptor in tissue samples. The molecular pharmacology of both human melatonin receptors MT1 and MT2, using a series of 24 ligands at these receptors and the new radioligands, did not lead to noticeable variations in the profiles. For the first time, we described radiolabeled tools that are specific for one of the melatonin receptors (MT2). These tools are amenable to binding experiments and to autoradiography using sheep or rat tissues. These specific tools will permit better understanding of the role and implication in physiopathologic processes of the melatonin receptors.
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Affiliation(s)
- Céline Legros
- Pôle d'Expertise Biotechnologie, Chimie, Biologie (C.L., C.B., P.Du., O.N., J.A.B.), and Unité de Recherches et Découvertes en Neurosciences (P.De.), Institut de Recherches SERVIER, Croissy-sur-Seine, France
| | - Chantal Brasseur
- Pôle d'Expertise Biotechnologie, Chimie, Biologie (C.L., C.B., P.Du., O.N., J.A.B.), and Unité de Recherches et Découvertes en Neurosciences (P.De.), Institut de Recherches SERVIER, Croissy-sur-Seine, France
| | - Philippe Delagrange
- Pôle d'Expertise Biotechnologie, Chimie, Biologie (C.L., C.B., P.Du., O.N., J.A.B.), and Unité de Recherches et Découvertes en Neurosciences (P.De.), Institut de Recherches SERVIER, Croissy-sur-Seine, France
| | - Pierre Ducrot
- Pôle d'Expertise Biotechnologie, Chimie, Biologie (C.L., C.B., P.Du., O.N., J.A.B.), and Unité de Recherches et Découvertes en Neurosciences (P.De.), Institut de Recherches SERVIER, Croissy-sur-Seine, France
| | - Olivier Nosjean
- Pôle d'Expertise Biotechnologie, Chimie, Biologie (C.L., C.B., P.Du., O.N., J.A.B.), and Unité de Recherches et Découvertes en Neurosciences (P.De.), Institut de Recherches SERVIER, Croissy-sur-Seine, France
| | - Jean A Boutin
- Pôle d'Expertise Biotechnologie, Chimie, Biologie (C.L., C.B., P.Du., O.N., J.A.B.), and Unité de Recherches et Découvertes en Neurosciences (P.De.), Institut de Recherches SERVIER, Croissy-sur-Seine, France
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11
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Pringle A, Bogdanovskaya M, Waskett P, Zacharia S, Cowen PJ, Harmer CJ. Does melatonin treatment change emotional processing? Implications for understanding the antidepressant mechanism of agomelatine. J Psychopharmacol 2015; 29:1129-32. [PMID: 26174133 DOI: 10.1177/0269881115592341] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The antidepressant, agomelatine, has a novel pharmacological profile, with agonist properties at M1 and M2 receptors and antagonist properties at 5HT2C receptors. Whether the antidepressant effects of this treatment are mediated by the drug's effects at the M1 and M2 receptors or the 5HT2C receptor or a synergy between these actions remains unclear. In the present study, a healthy volunteer model of emotional processing, which discriminates between effective and non-effective antidepressant compounds, was used to assess the contribution of melatonin agonism to the efficacy of agomelatine. Fifty-eight healthy volunteers were randomised to receive 7 days of once daily treatment with either 1 mg melatonin, 3 mg melatonin or placebo. Seven days treatment with 3 mg melatonin resulted in earlier bedtimes consistent with a phase advance in circadian rhythm. Some marginal effects of melatonin were observed on emotional processing; however, these were neither consistent with nor comparable to those seen following conventional antidepressant treatment or with agomelatine itself. These data suggest that the antidepressant action of agomelatine cannot be accounted for solely by its action at the M1 and M2 receptors.
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Affiliation(s)
- Abbie Pringle
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK
| | | | - Poppy Waskett
- Department of Experimental Psychology, University of Oxford, Oxford, UK
| | - Sophie Zacharia
- Department of Experimental Psychology, University of Oxford, Oxford, UK
| | - Philip J Cowen
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK
| | - Catherine J Harmer
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK
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12
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Spadoni G, Bedini A, Lucarini S, Mari M, Caignard DH, Boutin JA, Delagrange P, Lucini V, Scaglione F, Lodola A, Zanardi F, Pala D, Mor M, Rivara S. Highly Potent and Selective MT2 Melatonin Receptor Full Agonists from Conformational Analysis of 1-Benzyl-2-acylaminomethyl-tetrahydroquinolines. J Med Chem 2015; 58:7512-25. [DOI: 10.1021/acs.jmedchem.5b01066] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Gilberto Spadoni
- Dipartimento
di Scienze Biomolecolari, Università degli Studi di Urbino “Carlo Bo”, Piazza Rinascimento 6, I-61029 Urbino, Italy
| | - Annalida Bedini
- Dipartimento
di Scienze Biomolecolari, Università degli Studi di Urbino “Carlo Bo”, Piazza Rinascimento 6, I-61029 Urbino, Italy
| | - Simone Lucarini
- Dipartimento
di Scienze Biomolecolari, Università degli Studi di Urbino “Carlo Bo”, Piazza Rinascimento 6, I-61029 Urbino, Italy
| | - Michele Mari
- Dipartimento
di Scienze Biomolecolari, Università degli Studi di Urbino “Carlo Bo”, Piazza Rinascimento 6, I-61029 Urbino, Italy
| | - Daniel-Henri Caignard
- Institut de Recherches Servier, 125 Chemin de Ronde, F-78290 Croissy sur Seine, France
| | - Jean A. Boutin
- Institut de Recherches Servier, 125 Chemin de Ronde, F-78290 Croissy sur Seine, France
| | - Philippe Delagrange
- Institut de Recherches Servier, 125 Chemin de Ronde, F-78290 Croissy sur Seine, France
| | - Valeria Lucini
- Dipartimento
di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, Via Vanvitelli 32, I-20129 Milano, Italy
| | - Francesco Scaglione
- Dipartimento
di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, Via Vanvitelli 32, I-20129 Milano, Italy
| | - Alessio Lodola
- Dipartimento
di Farmacia, Università degli Studi di Parma, Parco Area
delle Scienze 27/A, I-43124 Parma, Italy
| | - Franca Zanardi
- Dipartimento
di Farmacia, Università degli Studi di Parma, Parco Area
delle Scienze 27/A, I-43124 Parma, Italy
| | - Daniele Pala
- Dipartimento
di Farmacia, Università degli Studi di Parma, Parco Area
delle Scienze 27/A, I-43124 Parma, Italy
| | - Marco Mor
- Dipartimento
di Farmacia, Università degli Studi di Parma, Parco Area
delle Scienze 27/A, I-43124 Parma, Italy
| | - Silvia Rivara
- Dipartimento
di Farmacia, Università degli Studi di Parma, Parco Area
delle Scienze 27/A, I-43124 Parma, Italy
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13
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Ettaoussi M, Pérès B, Errazani A, Boutin JA, Caignard DH, Delagrange P, Melnyk P, Berthelot P, Yous S. Synthesis and pharmacological evaluation of dual ligands for melatonin (MT1/MT2) and serotonin 5-HT2C receptor subtypes (II). Eur J Med Chem 2015; 90:822-33. [DOI: 10.1016/j.ejmech.2014.12.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 12/09/2014] [Accepted: 12/12/2014] [Indexed: 12/19/2022]
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14
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Landagaray E, Yous S, Vaccher C, Lipka E. Enantioseparation and thermodynamic study of naphthalene derivatives, new melatoninergic agonists, on coated amylose [tris(S)-1-phenylethylcarbamate] stationary phase. Transposition to preparative scale. Biomed Chromatogr 2014; 29:689-97. [DOI: 10.1002/bmc.3332] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 07/03/2014] [Accepted: 08/19/2014] [Indexed: 01/03/2023]
Affiliation(s)
- Elodie Landagaray
- Université Lille Nord de France; UDSL, EA 4481 and EA GRIIOT, UFR Pharmacie; F-59000 Lille France
| | - Saïd Yous
- Université Lille Nord de France; UDSL, EA 4481 and EA GRIIOT, UFR Pharmacie; F-59000 Lille France
| | - Claude Vaccher
- Université Lille Nord de France; UDSL, EA 4481 and EA GRIIOT, UFR Pharmacie; F-59000 Lille France
| | - Emmanuelle Lipka
- Université Lille Nord de France; UDSL, EA 4481 and EA GRIIOT, UFR Pharmacie; F-59000 Lille France
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15
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Lipka E, Landagaray E, Ettaoussi M, Yous S, Vaccher C. Enhanced detection for determination of enantiomeric purity of novel agomelatine analogs by EKC using single and dual cyclodextrin systems. Electrophoresis 2014; 35:2785-92. [DOI: 10.1002/elps.201400106] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 05/26/2014] [Accepted: 05/26/2014] [Indexed: 11/07/2022]
Affiliation(s)
| | | | | | - Saïd Yous
- Univ. Lille Nord de France, UDSL; Lille France
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16
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Ettaoussi M, Pérès B, Jarry C, Nosjean O, Boutin JA, Gohier A, Mannoury la Cour C, Caignard DH, Delagrange P, Berthelot P, Yous S. Synthesis, chiral resolution, absolute configuration assignment and pharmacological evaluation of a series of melatoninergic ligands. MEDCHEMCOMM 2014. [DOI: 10.1039/c4md00149d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
(−)-R-Enantiomers of agomelatine analogues were more potent at serotonin 5-HT2C receptors than (+)-S-enantiomers, and showed antidepressant-like properties in a tail suspension test.
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Affiliation(s)
| | - Basile Pérès
- Univ Lille Nord de France
- , France
- UDSL
- EA GRIIOT
- UFR Pharmacie
| | | | - Olivier Nosjean
- Biotechnologies
- Pharmacologie Moléculaire et Cellulaire
- Institut de Recherches Servier
- , France
| | - Jean A. Boutin
- Biotechnologies
- Pharmacologie Moléculaire et Cellulaire
- Institut de Recherches Servier
- , France
| | - Arnaud Gohier
- Département des Sciences Expérimentales
- Institut de Recherches Servier
- , France
| | | | | | - Philippe Delagrange
- Département des Sciences Expérimentales
- Institut de Recherches Servier
- , France
| | | | - Saïd Yous
- Univ Lille Nord de France
- , France
- UDSL
- EA GRIIOT
- UFR Pharmacie
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17
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Legros C, Devavry S, Caignard S, Tessier C, Delagrange P, Ouvry C, Boutin JA, Nosjean O. Melatonin MT₁ and MT₂ receptors display different molecular pharmacologies only in the G-protein coupled state. Br J Pharmacol 2014; 171:186-201. [PMID: 24117008 PMCID: PMC3874706 DOI: 10.1111/bph.12457] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Revised: 09/13/2013] [Accepted: 09/18/2013] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND AND PURPOSE Melatonin receptors have been extensively characterized regarding their affinity and pharmacology, mostly using 2-[(125)I]-melatonin as a radioligand. Although [(3)H]-melatonin has the advantage of corresponding to the endogenous ligand of the receptor, its binding has not been well described. EXPERIMENTAL APPROACH We characterized [(3)H]-melatonin binding to the hMT₁ and hMT₂ receptors expressed in a range of cell lines and obtained new insights into the molecular pharmacology of melatonin receptors. KEY RESULTS The binding of [(3)H]-melatonin to the hMT₁ and hMT₂ receptors displayed two sites on the saturation curves. These two binding sites were observed on cell membranes expressing recombinant receptors from various species as well as on whole cells. Furthermore, our GTPγS/NaCl results suggest that these sites on the saturation curves correspond to the G-protein coupled and uncoupled states of the receptors, whose pharmacology was extensively characterized. CONCLUSIONS AND IMPLICATIONS hMT₁ and hMT₂ receptors spontaneously exist in two states when expressed in cell lines; these states can be probed by [(3)H]-melatonin binding. Overall, our results suggest that physiological regulation of the melatonin receptors may result from complex and subtle mechanisms, a small difference in affinity between the active and inactive states of the receptor, and spontaneous coupling to G-proteins.
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Affiliation(s)
- Céline Legros
- Biotechnologies, Pharmacologie Moléculaire et Cellulaire, Institut de Recherches ServierCroissy-sur-Seine, France
| | - Séverine Devavry
- Biotechnologies, Pharmacologie Moléculaire et Cellulaire, Institut de Recherches ServierCroissy-sur-Seine, France
- INRA, UMR85 Physiologie de la Reproduction et des ComportementsNouzilly, France
- CNRS, UMR6175Nouzilly, France
| | - Sarah Caignard
- Biotechnologies, Pharmacologie Moléculaire et Cellulaire, Institut de Recherches ServierCroissy-sur-Seine, France
| | - Clémence Tessier
- Biotechnologies, Pharmacologie Moléculaire et Cellulaire, Institut de Recherches ServierCroissy-sur-Seine, France
| | - Philippe Delagrange
- Unité de Recherches en Neurosciences, Institut de Recherches ServierCroissy-sur-Seine, France
| | - Christine Ouvry
- Biotechnologies, Pharmacologie Moléculaire et Cellulaire, Institut de Recherches ServierCroissy-sur-Seine, France
| | - Jean A Boutin
- Biotechnologies, Pharmacologie Moléculaire et Cellulaire, Institut de Recherches ServierCroissy-sur-Seine, France
| | - Olivier Nosjean
- Biotechnologies, Pharmacologie Moléculaire et Cellulaire, Institut de Recherches ServierCroissy-sur-Seine, France
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