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Armstrong JL, Casey AB, Saraf TS, Mukherjee M, Booth RG, Canal CE. ( S)-5-(2'-Fluorophenyl)- N, N-dimethyl-1,2,3,4-tetrahydronaphthalen-2-amine, a Serotonin Receptor Modulator, Possesses Anticonvulsant, Prosocial, and Anxiolytic-like Properties in an Fmr1 Knockout Mouse Model of Fragile X Syndrome and Autism Spectrum Disorder. ACS Pharmacol Transl Sci 2020; 3:509-523. [PMID: 32566916 DOI: 10.1021/acsptsci.9b00101] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Indexed: 12/12/2022]
Abstract
Fragile X syndrome (FXS) is a neurodevelopmental disorder characterized by intellectual disabilities and a plethora of neuropsychiatric symptoms. FXS is the leading monogenic cause of autism spectrum disorder (ASD), which is defined clinically by repetitive and/or restrictive patterns of behavior and social communication deficits. Epilepsy and anxiety are also common in FXS and ASD. Serotonergic neurons directly innervate and modulate the activity of neurobiological circuits altered in both disorders, providing a rationale for investigating serotonin receptors (5-HTRs) as targets for FXS and ASD drug discovery. Previously we unveiled an orally active aminotetralin, (S)-5-(2'-fluorophenyl)-N,N-dimethyl-1,2,3,4-tetrahydronaphthalen-2-amine (FPT), that exhibits partial agonist activity at 5-HT1ARs, 5-HT2CRs, and 5-HT7Rs and that reduces repetitive behaviors and increases social approach behavior in wild-type mice. Here we report that in an Fmr1 knockout mouse model of FXS and ASD, FPT is prophylactic for audiogenic seizures. No FPT-treated mice displayed audiogenic seizures, compared to 73% of vehicle-treated mice. FPT also exhibits anxiolytic-like effects in several assays and increases social interactions in both Fmr1 knockout and wild-type mice. Furthermore, FPT increases c-Fos expression in the basolateral amygdala, which is a preclinical effect produced by anxiolytic medications. Receptor pharmacology assays show that FPT binds competitively and possesses rapid association and dissociation kinetics at 5-HT1ARs and 5-HT7Rs, yet has slow association and rapid dissociation kinetics at 5-HT2CRs. Finally, we reassessed and report FPT's affinity and function at 5-HT1ARs, 5-HT2CRs, and 5-HT7Rs. Collectively, these observations provide mounting support for further development of FPT as a pharmacotherapy for common neuropsychiatric symptoms in FXS and ASD.
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Affiliation(s)
- Jessica L Armstrong
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University Health Sciences Center, Mercer University, 3001 Mercer University Drive, Atlanta, Georgia 30341, United States
| | - Austen B Casey
- Center for Drug Discovery, Department of Pharmaceutical Sciences, and Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02131, United States
| | - Tanishka S Saraf
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University Health Sciences Center, Mercer University, 3001 Mercer University Drive, Atlanta, Georgia 30341, United States
| | - Munmun Mukherjee
- Center for Drug Discovery, Department of Pharmaceutical Sciences, and Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02131, United States
| | - Raymond G Booth
- Center for Drug Discovery, Department of Pharmaceutical Sciences, and Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02131, United States
| | - Clinton E Canal
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University Health Sciences Center, Mercer University, 3001 Mercer University Drive, Atlanta, Georgia 30341, United States
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2
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Gadgaard C, Jensen AA. Functional characterization of 5-HT 1A and 5-HT 1B serotonin receptor signaling through G-protein-activated inwardly rectifying K + channels in a fluorescence-based membrane potential assay. Biochem Pharmacol 2020; 175:113870. [PMID: 32088264 DOI: 10.1016/j.bcp.2020.113870] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 02/18/2020] [Indexed: 11/15/2022]
Abstract
The 5-HT1A and 5-HT1B serotonin receptors are abundantly expressed in the CNS and constitute validated as well as putative drug targets in a variety of psychiatric and cognitive disorders, alcoholism/addiction, pain and migraine. In the present study we have characterized the functional properties of human 5-HT1A and 5-HT1B stably co-expressed with the human G-protein-activated inwardly rectifying K+ channel 2 (GIRK2) in HEK293 cells in the fluorescence-based FLIPR® Membrane Potential Blue (FMP) assay. Serotonin and other agonists induced robust decreases in fluorescence levels in the 5-HT1A/GIRK2- and 5-HT1B/GIRK2-HEK293 cells in a concentration-dependent manner in the assay, and these responses could be inhibited by selective 5-HT1A/5-HT1B antagonists and by the Gαi/o-protein inhibitor pertussis toxin (PTX). Five additional stable HEK293 cell lines co-expressing 5-HT1A or 5-HT1B with GIRK2 and one of the PTX-insensitive Gαi/o-subunit mutants Gαi1C351I, Gαi2C352I and Gαo1C351I were constructed, and 5-HT1A/5-HT1B-mediated responses through these specific Gαi/o-subunits were measured in these cells pretreated with PTX in the FMP assay. The functional properties of 16 reference 5-HT1 agonists were characterized at the seven cell lines, which constitutes the most detailed pharmacological profiling and comparison of 5-HT1A and 5-HT1B receptor signaling in the same assay published to date. We propose that this approach to assay 5-HT1-mediated signaling through endogenous Gαi/o-proteins in HEK293 cells or through specific Gαi/o-subunits in a fairly high-throughput manner holds some advantages to other functional assays for Gαi/o-coupled receptors. The assay will facilitate detailed profiling of the Gαi/o- and Gβγ-mediated signaling of 5-HT1A and 5-HT1B at the molecular level, and it could also be used to identify novel modulators for the receptors.
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Affiliation(s)
- Camilla Gadgaard
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Anders A Jensen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark.
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Ribeiro CAS, Pupo AS. Involvement of α1B-adrenoceptors in the anti-immobility effect of imipramine in the tail suspension test. Eur J Pharmacol 2015; 750:39-42. [DOI: 10.1016/j.ejphar.2015.01.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 01/14/2015] [Accepted: 01/15/2015] [Indexed: 10/24/2022]
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4
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5-HT1A receptor pharmacophores to screen for off-target activity of α1-adrenoceptor antagonists. J Comput Aided Mol Des 2013; 27:305-19. [PMID: 23625023 DOI: 10.1007/s10822-013-9647-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Accepted: 04/13/2013] [Indexed: 01/08/2023]
Abstract
The α1-adrenoceptors (α1-ARs), in particular the α1A-AR subtype, are current therapeutic targets of choice for the treatment of urogenital conditions, such as benign prostatic hyperplasia (BPH). Due to the similarity between the transmembrane domains of the α1-AR subtypes, and the serotonin receptor subtype 1A (5-HT1A-R), currently used α1-AR subtype-selective drugs to treat BPH display considerable off-target affinity for the 5-HT1A-R, leading to side effects. We describe the construction and validation of pharmacophores for 5-HT1A-R agonists and antagonists. Through the structural diversity of the training sets used in their development, these pharmacophores define the properties of a compound needed to bind to 5-HT1A receptors. Using these and previously published pharmacophores in virtual screening and profiling, we have identified unique chemical compounds (hits) that fit the requirements to bind to our target, the α1A-AR, selectively over the off-target, the 5-HT1A-R. Selected hits have been obtained and their affinities for α1A-AR, α1B-AR and 5-HT1A-R determined in radioligand binding assays, using membrane preparations which contain human receptors expressed individually. Three of the tested hits demonstrate statistically significant selectivity for α1A-AR over 5-HT1A-R. All seven tested hits bind to α1A-AR, with two compounds displaying K i values below 1 μM, and a further two K i values of around 10 μM. The insights and knowledge gained through the development of the new 5-HT1A-R pharmacophores will greatly aid in the design and synthesis of derivatives of our lead compound, and allow the generation of more efficacious and selective ligands.
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5
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Ueda T, Ugawa S, Ishida Y, Shimada S. Geissoschizine methyl ether has third-generation antipsychotic-like actions at the dopamine and serotonin receptors. Eur J Pharmacol 2011; 671:79-86. [DOI: 10.1016/j.ejphar.2011.09.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Revised: 07/04/2011] [Accepted: 09/08/2011] [Indexed: 11/26/2022]
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6
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Venkatesan AM, Dos Santos O, Ellingboe J, Evrard DA, Harrison BL, Smith DL, Scerni R, Hornby GA, Schechter LE, Andree TH. Novel benzofuran derivatives with dual 5-HT1A receptor and serotonin transporter affinity. Bioorg Med Chem Lett 2010; 20:824-7. [PMID: 20064720 DOI: 10.1016/j.bmcl.2009.12.093] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2009] [Revised: 12/21/2009] [Accepted: 12/24/2009] [Indexed: 11/25/2022]
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7
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Brennan JA, Graf R, Grauer SM, Navarra RL, Pulicicchio CM, Hughes ZA, Lin Q, Wantuch C, Rosenzweig-Lipson S, Pruthi F, Lai M, Smith D, Goutier W, van de Neut M, Robichaud AJ, Rotella D, Feenstra RW, Kruse C, Broqua P, Beyer CE, McCreary AC, Pausch MH, Marquis KL. WS-50030 [7-{4-[3-(1H-inden-3-yl)propyl]piperazin-1-yl}-1,3-benzoxazol-2(3H)-one]: a novel dopamine D2 receptor partial agonist/serotonin reuptake inhibitor with preclinical antipsychotic-like and antidepressant-like activity. J Pharmacol Exp Ther 2009; 332:190-201. [PMID: 19828876 DOI: 10.1124/jpet.109.157388] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The preclinical characterization of WS-50030 [7-{4-[3-(1H-inden-3-yl)propyl]piperazin-1-yl}-1,3-benzoxazol-2(3H)-one] is described. In vitro binding and functional studies revealed highest affinity to the D(2) receptor (D(2L) K(i), 4.0 nM) and serotonin transporter (K(i), 7.1 nM), potent D(2) partial agonist activity (EC(50), 0.38 nM; E(max), 30%), and complete block of the serotonin transporter (IC(50), 56.4 nM). Consistent with this in vitro profile, WS-50030 (10 mg/kg/day, 21 days) significantly increased extracellular 5-HT in the rat medial prefrontal cortex, short-term WS-50030 treatment blocked apomorphine-induced climbing (ID(50), 0.51 mg/kg) in a dose range that produced minimal catalepsy in mice and induced low levels of contralateral rotation in rats with unilateral substantia nigra 6-hydroxydopamine lesions (10 mg/kg i.p.), a behavioral profile similar to that of the D(2) partial agonist aripiprazole. In a rat model predictive of antipsychotic-like activity, WS-50030 and aripiprazole reduced conditioned avoidance responding by 42 and 55% at 10 mg/kg, respectively. Despite aripiprazole's reported lack of effect on serotonin transporters, long-term treatment with aripiprazole or WS-50030 reversed olfactory bulbectomy-induced hyperactivity at doses that did not reduce activity in sham-operated rats, indicating antidepressant-like activity for both compounds. Despite possessing serotonin reuptake inhibitory activity in addition to D(2) receptor partial agonism, WS-50030 displays activity in preclinical models predictive of antipsychotic- and antidepressant efficacy similar to aripiprazole, suggesting potential efficacy of WS-50030 versus positive and negative symptoms of schizophrenia, comorbid mood symptoms, bipolar disorder, major depressive disorder, and treatment-resistant depression. Furthermore, WS-50030 provides a tool to further explore how combining these mechanisms might differentiate from other antipsychotics or antidepressants.
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Affiliation(s)
- Julie A Brennan
- Discovery Neuroscience, Wyeth Research, CN8000, Princeton, NJ 08543, USA.
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8
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Zhou D, Stack GP, Lo J, Failli AA, Evrard DA, Harrison BL, Hatzenbuhler NT, Tran M, Croce S, Yi S, Golembieski J, Hornby GA, Lai M, Lin Q, Schechter LE, Smith DL, Shilling AD, Huselton C, Mitchell P, Beyer CE, Andree TH. Synthesis, Potency, and in Vivo Evaluation of 2-Piperazin-1-ylquinoline Analogues as Dual Serotonin Reuptake Inhibitors and Serotonin 5-HT1A Receptor Antagonists. J Med Chem 2009; 52:4955-9. [DOI: 10.1021/jm900374r] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dahui Zhou
- Chemical Sciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
| | - Gary P. Stack
- Chemical Sciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
| | - Jennifer Lo
- Chemical Sciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
| | - Amedeo A. Failli
- Chemical Sciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
| | - Deborah A. Evrard
- Chemical Sciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
| | - Boyd L. Harrison
- Chemical Sciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
| | | | - Megan Tran
- Chemical Sciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
| | - Susan Croce
- Chemical Sciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
| | - Soo Yi
- Chemical Sciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
| | | | - Geoffrey A. Hornby
- Discovery Neurosciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
| | - Margaret Lai
- Discovery Neurosciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
| | - Qian Lin
- Discovery Neurosciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
| | - Lee E. Schechter
- Discovery Neurosciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
| | - Deborah L. Smith
- Discovery Neurosciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
| | - Adam D. Shilling
- Drug Safety & Metabolism, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Christine Huselton
- Drug Safety & Metabolism, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Paul Mitchell
- Department of Pharmacy and Pharmacology, University of Bath, Claverton Down, Bath BA2 7AY, U.K
| | - Chad E. Beyer
- Discovery Neurosciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
| | - Terrance H. Andree
- Discovery Neurosciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
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9
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Hatzenbuhler NT, Baudy R, Evrard DA, Failli A, Harrison BL, Lenicek S, Mewshaw RE, Saab A, Shah U, Sze J, Zhang M, Zhou D, Chlenov M, Kagan M, Golembieski J, Hornby G, Lai M, Smith DL, Sullivan KM, Schechter LE, Andree TH. Advances toward New Antidepressants with Dual Serotonin Transporter and 5-HT1A Receptor Affinity within a Class of 3-Aminochroman Derivatives. Part 2. J Med Chem 2008; 51:6980-7004. [DOI: 10.1021/jm8007097] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nicole T. Hatzenbuhler
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Reinhardt Baudy
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Deborah A. Evrard
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Amedeo Failli
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Boyd L. Harrison
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Steven Lenicek
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Richard E. Mewshaw
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Annmarie Saab
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Uresh Shah
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Jean Sze
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Minsheng Zhang
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Dahui Zhou
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Michael Chlenov
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Michael Kagan
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Jeannette Golembieski
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Geoffrey Hornby
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Margaret Lai
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Deborah L. Smith
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Kelly M. Sullivan
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Lee E. Schechter
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
| | - Terrance H. Andree
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
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10
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Studies toward the discovery of the next generation of antidepressants. Part 6: Dual 5-HT1A receptor and serotonin transporter affinity within a class of arylpiperazinyl-cyclohexyl indole derivatives. Bioorg Med Chem 2008; 16:6707-23. [DOI: 10.1016/j.bmc.2008.05.075] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2008] [Revised: 05/29/2008] [Accepted: 05/29/2008] [Indexed: 11/23/2022]
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11
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Zhou D, Hatzenbuhler NT, Gross JL, Harrison BL, Evrard DA, Chlenov M, Golembieski J, Hornby G, Schechter LE, Smith DL, Andree TH, Stack GP. Novel pyridyl-fused 3-amino chroman derivatives with dual action at serotonin transporter and 5-HT1A receptor. Bioorg Med Chem Lett 2007; 17:3117-21. [PMID: 17407811 DOI: 10.1016/j.bmcl.2007.03.049] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2007] [Revised: 03/12/2007] [Accepted: 03/12/2007] [Indexed: 10/23/2022]
Abstract
Structural modifications of the initial lead, 3-aminochroman (4), led to the identification of a novel series of pyridyl-fused amino chroman derivatives (5-8) and the structural isomers (9-12). The compounds described were evaluated for dual 5-HT transporter inhibitory and 5-HT(1A) receptor activities. The design strategy, synthesis, and in vitro biological characterization for these novel compounds are described.
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Affiliation(s)
- Dahui Zhou
- Chemical and Screening Sciences, Wyeth Research, CN 8000, Princeton, NJ 08543-8000, USA.
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12
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Hatzenbuhler NT, Evrard DA, Harrison BL, Huryn D, Inghrim J, Kraml C, Mattes JF, Mewshaw RE, Zhou D, Hornby G, Lin Q, Smith DL, Sullivan KM, Schechter LE, Beyer CE, Andree TH. Synthesis and biological evaluation of novel compounds within a class of 3-aminochroman derivatives with dual 5-HT1A receptor and serotonin transporter affinity. J Med Chem 2006; 49:4785-9. [PMID: 16854086 DOI: 10.1021/jm060218h] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Compounds containing a 5-carbamoyl-8-fluoro-3-amino-3,4-dihydro-2H-1-benzopyran and a 3-alkylindole moiety linked through a common basic nitrogen were prepared and evaluated for 5-HT1A affinity, serotonin rat transporter affinity, and functional antagonist activity in vitro. 26a was found to be the most potent and selective compound in this series and was shown to possess neurochemical activity in vivo by producing acute and rapid increases in 5-HT in the rat frontal cortex.
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Affiliation(s)
- Nicole T Hatzenbuhler
- Chemical and Screening Sciences and Discovery Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543, USA.
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13
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Zhou D, Harrison BL, Shah U, Andree TH, Hornby GA, Scerni R, Schechter LE, Smith DL, Sullivan KM, Mewshaw RE. Studies toward the discovery of the next generation of antidepressants. Part 5: 3,4-Dihydro-2H-benzo[1,4]oxazine derivatives with dual 5-HT1A receptor and serotonin transporter affinity. Bioorg Med Chem Lett 2006; 16:1338-41. [PMID: 16332439 DOI: 10.1016/j.bmcl.2005.11.054] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2005] [Revised: 11/11/2005] [Accepted: 11/14/2005] [Indexed: 11/30/2022]
Abstract
The design, synthesis, and structure-activity relationship of two novel classes of benzoxazine derivatives with dual selective serotonin reuptake inhibitors and 5-HT(1A) receptor activities are described.
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Affiliation(s)
- Dahui Zhou
- Chemical and Screening Sciences, Wyeth Research, CN 8000, Princeton, NJ 08543-8000, USA.
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14
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Kukkonen JP. Regulation of receptor-coupling to (multiple) G proteins. A challenge for basic research and drug discovery. ACTA ACUST UNITED AC 2005; 10:167-83. [PMID: 15989081 DOI: 10.3109/10606820490926151] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
G protein-coupled receptors induce intracellular signals via interaction of with cytosolic/peripheral membrane proteins, mainly G proteins. There has been much debate about the mode of interaction between the receptors, G proteins and effectors, their mobility and the ways of determining the specificity of interaction. Additional complexity has been added to system upon the discovery of i) coupling of single receptors to several G proteins and ii) active direction of this by different ligands (stimulus trafficking). These data suggest that the most primary unit in the signal transduction is the receptor complexed with a specific G protein, making the investigation of the mechanism of receptor-G protein selection and interaction even more important. In this review, I will summarize the general knowledge of receptor interaction with G proteins and effectors and the ways of investigating this.
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Affiliation(s)
- Jyrki P Kukkonen
- Department of Neuroscience, Physiology, Uppsala University, Uppsala, Sweden.
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15
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Heusler P, Pauwels PJ, Wurch T, Newman-Tancredi A, Tytgat J, Colpaert FC, Cussac D. Differential ion current activation by human 5-HT(1A) receptors in Xenopus oocytes: evidence for agonist-directed trafficking of receptor signalling. Neuropharmacology 2005; 49:963-76. [PMID: 15964603 DOI: 10.1016/j.neuropharm.2005.05.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2004] [Revised: 03/24/2005] [Accepted: 05/03/2005] [Indexed: 11/20/2022]
Abstract
The subject of the present study was the functional and pharmacological characterization of human 5-HT(1A) receptor regulation of ion channels in Xenopus oocytes. Activation of the heterologously expressed human 5-HT(1A) receptor induced two distinct currents in Xenopus oocytes, consisting of a smooth inward current (I(smooth)) and an oscillatory calcium-activated chloride current, I(Cl(Ca)). 5-HT(1A) receptor coupling to both ionic responses as well as to co-expressed inward rectifier potassium (GIRK) channels was pharmacologically characterized using 5-HT(1A) receptor agonists. The relative order of efficacy for activation of GIRK current was 5-HT approximately F 13714 approximately L 694,247 approximately LY 228,729>flesinoxan approximately (+/-)8-OH-DPAT. In contrast, flesinoxan and (+/-)8-OH-DPAT typically failed to activate I(Cl(Ca)). The other ligands behaved as full or partial agonists, exhibiting an efficacy rank order of 5-HT approximately L 694,247>F 13714 approximately LY 228,729. The pharmacological profile of I(smooth) activation was completely distinct: flesinoxan and F 13714 were inactive and rather exhibited an inhibition of this current. I(smooth) was activated by the other agonists with an efficacy order of L 694,247>5-HT approximately LY 228,729>(+/-)8-OH-DPAT. Moreover, activation of I(smooth) was not affected by application of pertussis toxin or the non-hydrolyzable GDP-analogue, guanosine-5'-O-(2-thio)-diphosphate (GDP betaS), suggesting a GTP binding protein-independent pathway. Together, these results suggest the existence of distinct and agonist-specific signalling states of this receptor.
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Affiliation(s)
- Peter Heusler
- Centre de Recherche Pierre Fabre, 17, Avenue Jean Moulin, F-81106 Castres Cedex, France.
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16
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Childers WE, Abou-Gharbia MA, Kelly MG, Andree TH, Harrison BL, Ho DM, Hornby G, Huryn DM, Potestio L, Rosenzweig-Lipson SJ, Schmid J, Smith DL, Sukoff SJ, Zhang G, Schechter LE. Synthesis and biological evaluation of benzodioxanylpiperazine derivatives as potent serotonin 5-HT(1A) antagonists: the discovery of Lecozotan. J Med Chem 2005; 48:3467-70. [PMID: 15887953 DOI: 10.1021/jm049493z] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of benzodioxanylpiperazine derivatives possessing a 4-aryl amide substituent was prepared and evaluated for 5-HT(1A) affinity and functional antagonist activity in vitro and in vivo. All of the compounds in this series possessed high affinity for the human 5-HT(1A) receptor and many displayed potent antagonist activity in vitro and varying degrees of intrinsic activity in vivo. Compound 11c (Lecozotan) was selected for further development and is currently in clinical trials.
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Affiliation(s)
- Wayne E Childers
- Chemical and Screening Sciences and Neuroscience, Wyeth Research, CN 8000, Princeton, New Jersey 08543-8000, USA.
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17
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Gilbert AM, Coleman T, Kodah J, Mewshaw RE, Scerni R, Schechter LE, Smith DL, Andree TH. Novel aryloxy-8-azabicyclo[3.2.1]oct-3-enes with 5-HT transporter and 5-HT1A affinity. Bioorg Med Chem Lett 2005; 14:5281-4. [PMID: 15454211 DOI: 10.1016/j.bmcl.2004.08.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2004] [Revised: 08/12/2004] [Accepted: 08/14/2004] [Indexed: 11/28/2022]
Abstract
Joining aryl 8-azabicyclo[3.2.1]oct-3-enes with aryloxyethanes and aryloxypropanes produces novel series of compounds 11 and 12 with potent 5-HT-T affinity and moderately potent 5-HT(1A) affinity. Moreover, several of these compounds possess functional 5-HT(1A) antagonism. Optimal compounds are, 4-indolyloxyethane 21, 4-indolyloxypropanes 25, and 27, which possess potent 5-HT-T affinity (5-HT-T K(i): 21: 1.2nM, 25: 0.54nM, 27: 0.38nM) and good 5-HT(1A) affinity/antagonism (5-HT(1A)K(i), [(35)S]GTPgammaS: E(max) (%): 21: 111.1nM, 0%; 25: 173.2nM, 0%; 27: 107nM, 0%).
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Affiliation(s)
- Adam M Gilbert
- Chemical and Screening Sciences, Wyeth Research, 401 N. Middletown Road, Pearl River, NY 10965-1215, USA.
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18
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Sampaio LFS, Hamassaki-Britto DE, Markus RP. Influence of melatonin on the development of functional nicotinic acetylcholine receptors in cultured chick retinal cells. Braz J Med Biol Res 2005; 38:603-13. [PMID: 15962187 DOI: 10.1590/s0100-879x2005000400015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The influence of melatonin on the developmental pattern of functional nicotinic acetylcholine receptors was investigated in embryonic 8-day-old chick retinal cells in culture. The functional response to acetylcholine was measured in cultured retina cells by microphysiometry. The maximal functional response to acetylcholine increased 2.7 times between the 4th and 5th day in vitro (DIV4, DIV5), while the Bmax value for [125I]-alpha-bungarotoxin was reduced. Despite the presence of alpha8-like immunoreactivity at DIV4, functional responses mediated by alpha-bungarotoxin-sensitive nicotinic acetylcholine receptors were observed only at DIV5. Mecamylamine (100 microM) was essentially without effect at DIV4 and DIV5, while dihydro-ss-erythroidine (10-100 microM) blocked the response to acetylcholine (3.0 nM-2.0 microM) only at DIV4, with no effect at DIV5. Inhibition of melatonin receptors with the antagonist luzindole, or melatonin synthesis by stimulation of D4 dopamine receptors blocked the appearance of the alpha-bungarotoxin-sensitive response at DIV5. Therefore, alpha-bungarotoxin-sensitive receptors were expressed in retinal cells as early as at DIV4, but they reacted to acetylcholine only after DIV5. The development of an alpha-bungarotoxin-sensitive response is dependent on the production of melatonin by the retinal culture. Melatonin, which is produced in a tonic manner by this culture, and is a key hormone in the temporal organization of vertebrates, also potentiates responses mediated by alpha-bungarotoxin-sensitive receptors in rat vas deferens and cerebellum. This common pattern of action on different cell models that express alpha-bungarotoxin-sensitive receptors probably reflects a more general mechanism of regulation of these receptors.
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Affiliation(s)
- L F S Sampaio
- Laboratório de Cronofarmacologia, Departamento de Fisiologia, Instituto de Biociências, Universidade de São Paulo, Brasil
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19
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Sharif NA, Drace CD, Williams GW, Crider JY. Cloned human 5-HT1A receptor pharmacology determined using agonist binding and measurement of cAMP accumulation. J Pharm Pharmacol 2005; 56:1267-74. [PMID: 15482641 DOI: 10.1211/0022357044346] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Twenty agonists and nine antagonists were evaluated for their ability to compete for [3H]-8-hydroxy-2-(di-n-propylamino)tetralin ([3H]-8-OH-DPAT) binding to the cloned human serotonin-1A (ch-5-HT1A) receptor expressed in Chinese hamster ovary cells and for their ability to alter adenylyl cyclase activity in the same cells. The most potent full agonists of high affinity included N,N-dipropyl-5-carboxamidotryptamine (pEC50=9.6 +/- 0.1), MDL 73005EF (pEC50=9.3 +/- 0.2), 5-methyl-urapidil (pEC50=9.2 +/- 0.1), 5-carboxamidotryptamine (pEC50=9.1 +/- 0.2), R(+)-8-OH-DPAT (pEC50=8.6 +/- 0.1) and BMY-7378 (pEC50=8.6 +/- 0.1). WB-4101 (pEC50=8.3 +/- 0.2; IA=79%), clozapine (pEC50=8.1 +/- 0.3; IA=29%), (buspirone (pEC50=7.6 +/- 0.2; IA=79%), quipazine (pEC50 <5; IA=45%) and R-DOI (pEC50 < 5; IA=31%) were weaker agonists with partial agonist properties. The most potent antagonists were WAY-100,635 (pKi=10.2 +/- 0.1), methiothepin (pKi=8.8 +/- 0.2), spiperone (pKi=8.7 +/- 0.2) and NAN-190 (pKi=8.5 +/- 0.2). The receptor affinities and functional potencies were well correlated (r=0.88; P <0.0001). Our binding data correlated well with the pharmacology of endogenous 5-HT1A receptors in the rabbit iris-ciliary body (r=0.91; P <0.001) and rat hippocampus (r=0.93, P <0.0001). Our functional cAMP data correlated well with other cAMP accumulation data (r=0.8, P <0.01 vs calf hippocampus) but less so with [35S]-GTPgammaS binding to the ch-5-HT(1A) receptor as a functional activity read-out (r=0.58, P <0.05). The present study provides a detailed pharmacological characterization of the ch-5-HT1A receptor using binding and functional assays.
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Affiliation(s)
- Najam A Sharif
- Molecular Pharmacology Unit, Pharmaceutical Products Research, Alcon Research, Ltd, Fort Worth, TX 76134-2099, USA.
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20
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Nylund G, Nordgren S, Delbro DS. Expression of P2Y2 purinoceptors in MCG 101 murine sarcoma cells, and HT-29 human colon carcinoma cells. Auton Neurosci 2004; 112:69-79. [PMID: 15233932 DOI: 10.1016/j.autneu.2004.04.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2003] [Revised: 04/15/2004] [Accepted: 04/16/2004] [Indexed: 11/19/2022]
Abstract
We investigated how agonists at purinoceptors may affect tumour cell metabolism. This was investigated in vitro in tumour cell lines by microphysiometry, which method monitors extracellular acidification rate (ECAR), on-line. The cell lines investigated were the murine sarcoma, MCG 101, and the human colon cancer, HT-29. In MCG 101, adenosine-5'-triphosphate (ATP) or uridine-5'-triphosphate (UTP) caused a concentration-dependent increase in ECAR, most likely due to the ligation of P2Y(2) receptors, which response was blocked by suramin. In HT-29, ATP or UTP elicited a concentration-dependent, biphasic change in ECAR (increase/decrease). The pharmacological analysis suggests the involvement of P2Y(2) receptors, although other P2 receptor subtypes cannot be entirely excluded. This biphasic response to UTP or ATP was resistant to suramin. The expression of P2Y(2) receptors was demonstrated in both cell lines by immunocytochemistry and Western blot. The current study, thus, shows the functional and morphological expression of a purinoceptor subtype with partly different effects on metabolism in two different tumour cell lines.
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Affiliation(s)
- Gunnar Nylund
- Department of Surgery, Institute of Surgical Sciences, Sahlgrenska University Hospital, SE-413 45 Göteborg, Sweden
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21
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Nylund G, Nordgren S, Delbro DS. Demonstration of functional receptors for noradrenaline and adenosine-5'-triphosphate, but not for prostaglandin E2, in HT-29 human colon cancer cell line. ACTA ACUST UNITED AC 2004; 23:193-9. [PMID: 14690494 DOI: 10.1046/j.1474-8673.2003.00295.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
1. The aim of the current study was to investigate in HT-29 human colon cancer cell line, the existence of functional receptors for the signalling molecules, noradrenaline (NA), prostaglandin E2 (PGE2), and adenosine-5'-triphosphate (ATP). 2. We utilized microphysiometry, which monitors on-line extracellular acidification rate (ECAR) as a measure of cellular metabolic activity, and how this variable is altered by signalling molecules. 3. Challenge with NA (5.9 microM) resulted in an increase in ECAR by approximately 24% of basal. 4. PGE2 (0.0284, 0.284 and 2.84 microM) hardly affected ECAR. 5. ATP (100 microM) elicited a biphasic effect on ECAR (increase and decrease in ECAR by about 58 and 10% of basal, respectively). 6. HT-29 cells were shown to express COX-2 by immunocytochemistry. 7. These data suggest the presence of functional receptors for NA and ATP, but not for PGE2 in HT-29 human colon cancer cell line.
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Affiliation(s)
- G Nylund
- Department of Surgery, Institute of Surgical Sciences, Sahlgrenska University Hospital, SE-413 45 Göteborg, Sweden
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22
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Nylund G, Andersson M, Haraldsson B, Delbro DS. Effects of norepinephrine or prostaglandin E2 on extracellular acidification rate of MCG 101, or K1735-M2 tumor cells. Life Sci 2004; 75:1747-59. [PMID: 15268974 DOI: 10.1016/j.lfs.2004.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2004] [Accepted: 05/18/2004] [Indexed: 11/28/2022]
Abstract
We studied by microphysiometry functional effects of two different signalling molecules in the murine tumor cell lines, MCG 101 and K1735-M2, namely norepinephrine (NE) and prostaglandin E2 (PGE2). This methodology implies estimation of intracellular metabolism by measurements of extracellular acidification rate (ECAR). MCG 101 (an undifferentiated, epithelial-like tumor), in contrast to K1735-M2 (a melanoma), has been found to produce great amounts of PGE2. Challenge of MCG 101 cells with PGE2 (0.284 and 2.84 microM for 9 min) elicited an increase in ECAR by about 10 and 41% above basal level, respectively. Pretreatment with indomethacin (0.5 microM) reduced the response to the two PGE2 concentrations by about 70 and 25%, respectively. In contrast, PGE2 caused virtually no response in K1735-M2 cells. Moreover, NE caused increases in ECAR in both cell types, possibly via beta3-adrenoceptors, as investigated pharmacologically in MCG 101, and by immunocytochemistry in both cell lines. The results obtained strongly suggest functional receptors for PGE2 in MCG 101, but not K1735-M2 tumor cells. Functional receptors for NE were demonstrated in both cell lines. There is possibly an autocrine loop in the MCG 101 cells, in which PGE2 activates cyclooxygenase.
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Affiliation(s)
- Gunnar Nylund
- Department of Surgery, Institute of Surgical Sciences, Sahlgrenska University Hospital, S 413 45 Goteborg, Sweden
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23
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Mewshaw RE, Zhou D, Zhou P, Shi X, Hornby G, Spangler T, Scerni R, Smith D, Schechter LE, Andree TH. Studies toward the discovery of the next generation of antidepressants. 3. Dual 5-HT1A and serotonin transporter affinity within a class of N-aryloxyethylindolylalkylamines. J Med Chem 2004; 47:3823-42. [PMID: 15239661 DOI: 10.1021/jm0304010] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
N-aryloxylethylindolealkylamines (5) having dual 5-HT transporter and 5-HT(1A) affinity are described. These compounds represent truncated analogues of our previously reported piperidinyl derivatives (3). Compounds in this investigation were found to have more similar affinities and functional activities for the 5-HT(1A) receptor and 5-HT transporter. Though 5-HT(1A) antagonism is not consistently observed throughout series 5, several molecular features were found to be essential to obtain high and balanced activities. The proper placement of a heteroatom in the aryl ring and the length of the linkage used to tether the indole moiety had significant influence on 5-HT(1A) and 5-HT transporter affinities. Introduction of a halogen into the aryl ring usually lowered intrinsic activity and in some cases led to full 5-HT(1A) antagonists. Compounds 33 and 34 were observed to be full 5-HT(1A) antagonists with K(i) values of approximately 30 nM for the 5-HT(1A) receptor and K(i) values of 5 and 0.5 nM for the 5-HT transporter, respectively. Unfortunately, similar to our previous series (3), compounds in this report also had high affinity for the alpha(1) receptor.
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Affiliation(s)
- Richard E Mewshaw
- Chemical and Screening Sciences and Neuroscience Discovery Research, Wyeth Research, P.O. Box 42528, Philadelphia, PA 19101-2528, USA.
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24
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Gilbert AM, Stack GP, Nilakantan R, Kodah J, Tran M, Scerni R, Shi X, Smith DL, Andree TH. Modulation of selective serotonin reuptake inhibitor and 5-HT1A antagonist activity in 8-aza-bicyclo[3.2.1]octane derivatives of 2,3-dihydro-1,4-benzodioxane. Bioorg Med Chem Lett 2004; 14:515-8. [PMID: 14698193 DOI: 10.1016/j.bmcl.2003.10.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
2,3-Dihydro-1,4-benzodioxanes with aryl 8-aza-bicyclo[3.2.1]oct-3-ene attachments 2 produce compounds with potent 5-HT-T affinity, and weak 5-HT(1A) affinity and alpha(1) affinity. This compares with 2,3-dihydro-1,4-benzodioxanes containing 8-aza-bicyclo[3.2.1] octan-3-ol attachments 4 which possess potent 5-HT(1A) affinity, moderate to good selectivity over alpha(1) and little 5-HT-T affinity. A 3-benzothiophene analogue of 4 (30) was synthesized which possesses potent 5-HT(1A) affinity and especially good selectivity over both alpha(1) and 5-HT-T.
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Affiliation(s)
- Adam M Gilbert
- Chemical and Screening Sciences, Wyeth Research, 401N. Middletown Road, Pearl River, NY 10945, USA.
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25
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Affiliation(s)
- Terry Kenakin
- Systems Research, GlaxoSmithKline Research and Development, 5 Moore Drive, Research Triangle Park, NC 27709, USA.
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26
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Kenakin T. Predicting therapeutic value in the lead optimization phase of drug discovery. Nat Rev Drug Discov 2003; 2:429-38. [PMID: 12776218 DOI: 10.1038/nrd1110] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Recombinant and natural cellular assays for human G-protein-coupled receptors are used to optimize initial lead molecules obtained from screening. Although the activity of these molecules can be assessed on human genotype receptors, there is increasing evidence that cells impose a phenotypic selectivity to molecules in various cellular backgrounds. This opens the possibility of dissimulations between activity seen in lead optimization assays and the intended therapeutic value in humans. This review discusses the mechanisms by which cells can impose phenotypic selectivity on molecules and approaches to reduce this practical problem for drug discovery.
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Affiliation(s)
- Terry Kenakin
- Systems Research, GlaxoSmithKline Research and Development, 5 Moore Drive, Research Triangle Park, North Carolina 27709, USA.
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27
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Kowal D, Zhang J, Nawoschik S, Ochalski R, Vlattas A, Shan Q, Schechter L, Dunlop J. The C-terminus of Gi family G-proteins as a determinant of 5-HT(1A) receptor coupling. Biochem Biophys Res Commun 2002; 294:655-9. [PMID: 12056819 DOI: 10.1016/s0006-291x(02)00535-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Using a universal signaling assay employing G-protein chimeras comprising the C-terminal five amino acids of Gi1/2, Gi3, Go, and Gz fused to Gq, the calcium mobilizing G-protein, we explored the role of the C-terminus of Gi family G-proteins as a determinant for 5-HT(1A) receptor functional coupling. Co-expression of the 5-HT(1A) receptor with each of the Gq/Gi family chimeras resulted in a concentration-dependent increase in calcium upon addition of 5-HT, although the coupling efficiency differed dramatically. Gq/Gi3 resulted in the most efficient coupling based on both potency and relative maximum response to 5-HT. Gq/Go also produced efficient coupling in terms of relative 5-HT efficacy (76% of the Gq/Gi3 maximum response), although 5-HT exhibited 4-fold lower agonist potency, and Gq/Gz and Gq/Gi1/2 conferred poor functional coupling. Agonist potencies and relative efficacies determined for a number of 5-HT(1A) receptor agonists using Gq/Gi3 coupling were significantly weaker than those described previously for coupling through the native G-protein. These results indicate the C-terminus of Gi3 as an important determinant for coupling to the 5-HT(1A) receptor, while the reduced functional agonist activities suggest additional motifs participate in receptor/G-protein coupling.
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Affiliation(s)
- Dianne Kowal
- Wyeth Research, Neuroscience Discovery Research, CN-8000, Princeton, NJ 08543-8000, USA
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28
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Abstract
Understanding quantitative aspects of cell energy metabolism and how it is influenced by environment is central to biology, medicine, and biotechnology. Most methods used for measuring metabolic fluxes associated with energy metabolism require considerable personnel effort or high maintenance instrumentation. The microphysiometer is a commercially available instrument that measures acid extrusion rates, which are commonly used for drug screening. With the addition of oxygen sensors, the instrument can also be used to measure cell oxygen consumption rates and thereby calculate glycolytic fluxes. In the work described here, oxygen consumption and acid extrusion rates were used to measure glucose utilization by the H9c2 rat heart myoblast cell line and these results are compared with fluxes measured with a radiometric assay. Both assays were used to investigate changes in H9c2 energy metabolism due to cell stimulation with carbachol and insulin. The results demonstrate the utility of the microphysiometer method for measuring both transient and sustained changes in partitioning of glucose utilization between glycolysis and oxidation in live cells.
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Affiliation(s)
- Carmen Wiley
- Department of Chemistry, University of Washington, Seattle, WA 98195-1700, USA
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29
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Mewshaw RE, Meagher KL, Zhou P, Zhou D, Shi X, Scerni R, Smith D, Schechter LE, Andree TH. Studies toward the discovery of the next generation of antidepressants. Part 2: incorporating a 5-HT(1A) antagonist component into a class of serotonin reuptake inhibitors. Bioorg Med Chem Lett 2002; 12:307-10. [PMID: 11814784 DOI: 10.1016/s0960-894x(01)00746-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The design and synthesis of a novel series of indole derivatives (9) having dual 5-HT transporter reuptake and 5-HT(1A) antagonist activity are described.
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Affiliation(s)
- Richard E Mewshaw
- Global Chemical Sciences and Neuroscience Departments, Wyeth-Ayerst Research Laboratories, PO Box 42528, Philadelphia, PA 19101-2528, USA.
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30
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Amano T, Akbar M, Matsubayashi H, Sasa M. Inhibitory effects of tandospirone, a 5-HT1A agonist, on medial vestibular nucleus neurons responding to lateral roll tilt stimulation in rats. Brain Res 2001; 910:195-8. [PMID: 11489272 DOI: 10.1016/s0006-8993(01)02698-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
An electrophysiological study was performed using chloral hydrate-anesthetized rats to determine whether tandospirone, a 5-HT1A agonist, affects neuronal activities of the medial vestibular nucleus (MVN), since serotonergic innervation and 5-HT1A receptors are present in this nucleus. Tandospirone applied microiontophoretically at a current of 20-60 nA caused an inhibition of tilt-induced firing of alpha-type neurons, which showed increased and decreased firing with lateral tilt ipsilateral and contralateral to the recording site, respectively, along with that of beta-type neurons which exhibited the reverse responses to ipsilateral and contralateral tilt stimulation. The inhibition was antagonized during simultaneous, iontophoretic application of WAY-100635 (20-60 nA), a 5-HT1A receptor antagonist, although WAY-100635 alone rarely affected spontaneous or tilt-induced firing in either type of neurons. These results suggest that tandospirone acts on a 5-HT1A receptor to inhibit transmission of otolith information to alpha- and beta-type MVN neurons.
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Affiliation(s)
- T Amano
- Department of Pharmacology, Hiroshima University School of Medicine, Hiroshima 734-8551, Japan
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31
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Meagher KL, Mewshaw RE, Evrard DA, Zhou P, Smith DL, Scerni R, Spangler T, Abulhawa S, Shi X, Schechter LE, Andree TH. Studies towards the next generation of antidepressants. Part 1: Indolylcyclohexylamines as potent serotonin reuptake inhibitors. Bioorg Med Chem Lett 2001; 11:1885-8. [PMID: 11459653 DOI: 10.1016/s0960-894x(01)00334-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
A series of indolylcyclohexylamines possessing potent and selective serotonin reuptake inhibition is reported. The most interesting compounds proved to have subnanomolar 5-HT transporter activity, and exhibited moderate 5-HT(1A) affinity.
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Affiliation(s)
- K L Meagher
- Global Chemical Sciences and Neuroscience Departments, Wyeth-Ayerst Research Laboratories, CN 8000, NJ 08543-8000, Princeton, USA
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32
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Sabb AL, Vogel RL, Kelly MG, Palmer Y, Smith DL, Andree TH, Schechter LE. 1,2,5-Thiadiazole derivatives are potent and selective ligands at human 5-HT1A receptors. Bioorg Med Chem Lett 2001; 11:1069-71. [PMID: 11327592 DOI: 10.1016/s0960-894x(01)00151-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Amino acid derivatives of 1,2,5-thiadiazol-3-yl-piperazine related to (+)-WAY-100135 and WAY-100635 are potent 5-HT1A receptor agonists and antagonists, which have selective affinity for 5-HT1A receptors versus alpha1 and dopamine (D2, D3, and D4) receptors.
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Affiliation(s)
- A L Sabb
- Medicinal Chemistry, Chemical Sciences, Wyeth-Ayerst Research, Princeton, NJ 08543, USA.
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33
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Glennon RA, Young R. MDMA stimulus generalization to the 5-HT(1A) serotonin agonist 8-hydroxy-2- (di-n-propylamino)tetralin. Pharmacol Biochem Behav 2000; 66:483-8. [PMID: 10899359 DOI: 10.1016/s0091-3057(00)00174-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
The abused substance N-methyl-1-(3, 4-methylenedioxyphenyl)-2-aminopropane, or MDMA, serves as a training drug in animals. Because the 5-HT(1A) receptor antagonist NAN-190 has been shown to partially antagonize the MDMA stimulus, and because NAN-190 binds at several different types of receptors, in the present study we examined other agents (e.g., adrenergic, dopaminergic, sigma) in tests of stimulus generalization and stimulus antagonism to determine their influence on the MDMA stimulus. Each of these agents (i.e., clenbuterol, S(-)propranolol, R(+)SCH-23390, amantadine, NANM) was without effect on MDMA-appropriate responding. The finding that NAN-190 behaves as a 5-HT(1A) partial agonist in some studies prompted examination of the 5-HT(1A) receptor agonist 8-OH DPAT and its optical isomers. MDMA-stimulus generalization occurred to racemic 8-OH DPAT (ED(50) = 0.3 mg/kg), R(+)8-OH DPAT (ED(50) = 0.2 mg/kg), and to the 5-HT(1A) receptor partial agonist S(-)8-OH DPAT (ED(50) = 0.4 mg/kg). The results suggest that the MDMA stimulus might possess a 5-HT(1A) component of action. Furthermore, because 8-OH DPAT is known to enhance the stimulus effects of hallucinogens as discriminative stimuli, and because MDMA reportedly enhances the effects of hallucinogenic agents in humans ("flipping," "candy flipping"), this latter MDMA-induced phenomenon might involve a 5-HT(1A) mechanism.
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Affiliation(s)
- R A Glennon
- Department of Medicinal Chemistry, Virginia Commonwealth University, Richmond, VA 23298-0540, USA
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Albert PR, Sajedi N, Lemonde S, Ghahremani MH. Constitutive G(i2)-dependent activation of adenylyl cyclase type II by the 5-HT1A receptor. Inhibition by anxiolytic partial agonists. J Biol Chem 1999; 274:35469-74. [PMID: 10585418 DOI: 10.1074/jbc.274.50.35469] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The 5-HT1A receptor is implicated in depression and anxiety. This receptor couples to G(i) proteins to inhibit adenylyl cyclase (AC) activity but can stimulate AC in tissues (e.g. hippocampus) that express ACII. The role of ACII in receptor-mediated stimulation of cAMP formation was examined in HEK-293 cells transfected with the 5-HT1A receptor, which mediated inhibition of basal and G(s)-induced cAMP formation in the absence of ACII. In cells cotransfected with 5-HT1A receptor and ACII plasmids, 5-HT1A agonists induced a 1. 5-fold increase in cAMP level. Cotransfection of 5-HT1A receptor, ACII, and Galpha(i2), but not Galpha(i1), Galpha(i3), or Galpha(o), resulted in an agonist-independent 6-fold increase in the basal cAMP level, suggesting that G(i2) preferentially coupled the receptor to ACII. The 5-HT1B receptor also constitutively activated ACII. Constitutive activity of the 5-HT1A receptor was blocked by pertussis toxin and the Gbetagamma antagonist, betaCT, suggesting an important role for Gbetagamma-mediated activation of ACII. The Thr-149 --> Ala mutation in the second intracellular domain of the 5-HT1A receptor disrupted Gbetagamma-selective activation of ACII. Spontaneous 5-HT1A receptor activity was partially attenuated by 5-HT1A receptor partial agonists with anxiolytic activity (e.g. buspirone and flesinoxan) but was not altered by full agonists or antagonists. Thus, anxiolytic activity may involve inhibition of spontaneous 5-HT1A receptor activity.
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Affiliation(s)
- P R Albert
- Neuroscience Research Institute, Department of Medicine, University of Ottawa, Ottawa, Canada K1H 8M5.
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Raymond JR, Mukhin YV, Gettys TW, Garnovskaya MN. The recombinant 5-HT1A receptor: G protein coupling and signalling pathways. Br J Pharmacol 1999; 127:1751-64. [PMID: 10482904 PMCID: PMC1566169 DOI: 10.1038/sj.bjp.0702723] [Citation(s) in RCA: 189] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The 5-hydroxytryptamine 5-HT1A receptor was one of the first G protein coupled receptors whose cDNA and gene were isolated by molecular cloning methods. Transfection of the cDNA of this receptor into cells previously bearing no 5-HT receptors has resulted in the acquisition of large amounts of information regarding potential signal transduction pathways linked to the receptor, correlations of receptor structure to its various functions, and pharmacological properties of the receptor. Transfection studies with the 5-HT1A receptor have generated critical new information that might otherwise have been elusive. This information notably includes the discovery of unsuspected novel signalling linkages, the elucidation of the mechanisms of receptor desensitization, the refinement of models of the receptor pharmacophore, and the development of silent receptor antagonists, among others. The current review summarizes the most important studies of the recombinant 5-HT1A receptor in the decade since the identification of its cDNA.
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Affiliation(s)
- J R Raymond
- Division of Nephrology, Department of Medicine, Medical University of South Carolina and the Ralph H. Johnson Veterans Affairs Medical Center, Charleston, South Carolina 29425, USA.
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