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Sharma VK, Yang X, Kim SK, Mafi A, Saiz-Sanchez D, Villanueva-Anguita P, Xiao L, Inoue A, Goddard WA, Loh YP. Novel interaction between neurotrophic factor-α1/carboxypeptidase E and serotonin receptor, 5-HTR1E, protects human neurons against oxidative/neuroexcitotoxic stress via β-arrestin/ERK signaling. Cell Mol Life Sci 2021; 79:24. [PMID: 34966948 PMCID: PMC8732845 DOI: 10.1007/s00018-021-04021-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 10/14/2021] [Accepted: 11/01/2021] [Indexed: 12/18/2022]
Abstract
Protecting neurons from death during oxidative and neuroexcitotoxic stress is key for preventing cognitive dysfunction. We uncovered a novel neuroprotective mechanism involving interaction between neurotrophic factor-α1 (NF-α1/carboxypeptidase E, CPE) and human 5-HTR1E, a G protein-coupled serotonin receptor with no previously known neurological function. Co-immunoprecipitation and pull-down assays confirmed interaction between NFα1/CPE and 5-HTR1E and 125I NF-α1/CPE-binding studies demonstrated saturable, high-affinity binding to 5-HTR1E in stably transfected HEK293 cells (Kd = 13.82 nM). Treatment of 5-HTR1E stable cells with NF-α1/CPE increased pERK 1/2 and pCREB levels which prevented a decrease in pro-survival protein, BCL2, during H2O2-induced oxidative stress. Cell survival assay in β-arrestin Knockout HEK293 cells showed that the NF-α1/CPE-5-HTR1E-mediated protection against oxidative stress was β-arrestin-dependent. Molecular dynamics studies revealed that NF-α1/CPE interacts with 5-HTR1E via 3 salt bridges, stabilized by several hydrogen bonds, independent of the serotonin pocket. Furthermore, after phosphorylating the C-terminal tail and intracellular loop 3 (ICL3) of NF-α1/CPE-5-HTR1E, it recruited β-arrestin1 by forming numerous salt bridges and hydrogen bonds to ICL2 and ICL3, leading to activation of β-arrestin1. Immunofluorescence studies showed 5-HTR1E and NF-α1/CPE are highly expressed and co-localized on cell surface of human hippocampal neurons. Importantly, knock-down of 5-HTR1E in human primary neurons diminished the NF-α1/CPE-mediated protection of these neurons against oxidative stress and glutamate neurotoxicity-induced cell death. Thus, NF-α1/CPE uniquely interacts with serotonin receptor 5-HTR1E to activate the β-arrestin/ERK/CREB/BCL2 pathway to mediate stress-induced neuroprotection.
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Affiliation(s)
- Vinay Kumar Sharma
- Section on Cellular Neurobiology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, 49, Convent Drive, Bldg 49, Rm 6A-10, Bethesda, MD, 20892, USA
| | - Xuyu Yang
- Section on Cellular Neurobiology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, 49, Convent Drive, Bldg 49, Rm 6A-10, Bethesda, MD, 20892, USA
| | - Soo-Kyung Kim
- Materials and Process Simulation Center, California Institute of Technology, Pasedena, CA, 91125, USA
| | - Amirhossein Mafi
- Materials and Process Simulation Center, California Institute of Technology, Pasedena, CA, 91125, USA
| | - Daniel Saiz-Sanchez
- Neuroplasticity and Neurodegeneration Laboratory, Medical School, Regional Center for Biomedical Research, University of Castilla-La Mancha, 13071, Ciudad Real, Spain
| | - Patricia Villanueva-Anguita
- Neuroplasticity and Neurodegeneration Laboratory, Medical School, Regional Center for Biomedical Research, University of Castilla-La Mancha, 13071, Ciudad Real, Spain
| | - Lan Xiao
- Section on Cellular Neurobiology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, 49, Convent Drive, Bldg 49, Rm 6A-10, Bethesda, MD, 20892, USA
| | - Asuka Inoue
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Miyagi, 980-8578, Japan
| | - William A Goddard
- Materials and Process Simulation Center, California Institute of Technology, Pasedena, CA, 91125, USA.
| | - Y Peng Loh
- Section on Cellular Neurobiology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, 49, Convent Drive, Bldg 49, Rm 6A-10, Bethesda, MD, 20892, USA.
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Gu P, Chen C, Wu Q, Dong C, Wang T, Wan Q, Dong X. The Effect and Safety of 5-HT 1F Receptor Agonist Lasmiditan on Migraine: A Systematic Review and Meta-Analysis. Biomed Res Int 2021; 2021:6663591. [PMID: 34660796 PMCID: PMC8517628 DOI: 10.1155/2021/6663591] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 08/04/2021] [Accepted: 08/30/2021] [Indexed: 11/18/2022]
Abstract
BACKGROUND Migraine has a great impact on public health. Current acute therapies do not satisfy all migraineurs. The novel serotonin 5-HT1F receptor agonist appears more promising for aborting migraine attacks. OBJECTIVE To evaluate the clinical efficacy and safety of lasmiditan in treating acute migraine attacks. METHODS The literature search was performed in PubMed, Embase, and the Cochrane Central Register of Controlled Trials for randomized controlled trials (RCTs) which assessed the effect and safety of lasmiditan on migraine. The risk of bias was assessed using the Cochrane Collaboration's risk of bias tool. Results were extracted and pooled as risk ratios (RRs) with a fixed or random-effects model. RESULTS Based on the four included RCTs, pooled estimates showed that lasmiditan with the 50 mg, 100 mg, and 200 mg doses was superior to placebo at 2 h after the first dose in terms of pain freedom, absence of migraine-associated symptoms, headache relief, no/mild disability, and global impression of change (very much/much better) (RRs ranged from 1.13 to 1.96), except for nausea-free and vomiting-free. Both lasmiditan 100 mg and 200 mg resulted in significantly fewer patients using rescue medication (100 mg: RR = 0.75, 95% CI (0.61, 0.92), P = 0.007; 200 mg: RR = 0.81, 95% CI (0.66, 0.99), P = 0.04) at 2-24 h postdose, compared with placebo. Safety data showed that the proportion of patients reporting at least one treatment-emergent adverse event (TEAE) and the incidence of most common TEAEs such as dizziness, paresthesia, fatigue, somnolence, and nausea was higher in the lasmiditan groups (50 mg, 100 mg, and 200 mg), compared with placebo. There was no significant difference between lasmiditan and placebo in terms of cardiovascular-related TEAEs (RR = 2.75, 95% CI (0.81, 9.37), P = 0.11). Compared with lasmiditan 100 mg, lasmiditan 200 mg was more effective in pain freedom at 2 h after the first dose (RR = 0.83, 95% CI (0.74, 0.94), P = 0.004) but associated with a higher risk of reporting at least one TEAE (RR = 0.88, 95% CI (0.81, 0.96), P = 0.006). CONCLUSIONS Lasmiditan with the 50 mg, 100 mg, and 200 mg doses are effective and safe in acute migraine treatment. Lasmiditan 200 mg is more effective than lasmiditan 100 mg in pain freedom, while lasmiditan 100 mg is better tolerated in the short-term follow-up. Further larger sample-size RCTs are required to verify the applicability and tolerability in the long term.
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Affiliation(s)
- Ping Gu
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, Jiangsu Province, China
| | - Cheng Chen
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, Jiangsu Province, China
- Department of Neurology, The Second Affiliated Hospital of Wannan Medical College, 10 Kangfu Road, Wuhu, Anhui Province, China
| | - Qian Wu
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, Jiangsu Province, China
| | - Changhong Dong
- Department of Clinical Medicine, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, Jiangsu Province, China
| | - Teng Wang
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, Jiangsu Province, China
| | - Qi Wan
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, Jiangsu Province, China
| | - Xin Dong
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, Jiangsu Province, China
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Pindelska E, Marczewska-Rak A, Jaśkowska J, Madura ID. Solvates of New Arylpiperazine Salicylamide Derivative-a Multi-Technique Approach to the Description of 5 HTR Ligand Structure and Interactions. Int J Mol Sci 2021; 22:ijms22094992. [PMID: 34066719 PMCID: PMC8125853 DOI: 10.3390/ijms22094992] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 04/22/2021] [Accepted: 04/26/2021] [Indexed: 11/21/2022] Open
Abstract
A new ligand for 5-HT1A and 5-HT7 receptors, an arylpiperazine salicylamide derivative with an inflexible spacer, is investigated to identify preferred fragments capable of creating essential intermolecular interactions in different solvates. To fully identify and characterize the obtained crystalline materials, various methods including powder and single-crystal X-ray diffraction, solid-state NMR, and thermal analysis were employed, supplemented by periodic ab initio calculations. The molecular conformation in different solvates, types, and hierarchy of intermolecular interactions as well as the crystal packing were investigated to provide data for future research focused on studying protein–ligand interactions. Based on various methods of crystal structure analysis, including the interaction energy calculation and programs using an artificial neural network, a salicylamide fragment was found to be crucial for intermolecular contacts, mostly of dispersion and electrostatic character. A supramolecular 2D kite-type layer of {4,4} topology was found to form in crystals. The closed voids between layers contain disordered solvents, very weakly interacting with the molecule and the layer. It has been postulated that the separation of the layers might be influenced by an increase in temperature or the size of the solvent; hence, only methanol and ethanol hemi-solvates could be obtained from a series of various alcohols.
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Affiliation(s)
- Edyta Pindelska
- Department of Analytical Chemistry and Biomaterials, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1, 02-093 Warsaw, Poland
- Correspondence: (E.P.); (I.D.M.)
| | - Anna Marczewska-Rak
- Scientific Circle “Spektrum” at Department of Analytical Chemistry and Biomaterials, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1, 02-093 Warsaw, Poland;
| | - Jolanta Jaśkowska
- Department of Organic Chemistry and Technology, Faculty of Chemical and Engineering and Technology, Cracow University of Technology, 24 Warszawska Street, 31-155 Cracow, Poland;
| | - Izabela D. Madura
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
- Correspondence: (E.P.); (I.D.M.)
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Guzmán-Rodríguez S, Chávez-Reyes J, Vázquez-León P, Soriano-Ursúa MA, Rosalez MN, Allende G, Marichal-Cancino BA. 1-Boc-Piperidine-4-Carboxaldehyde Prevents Binge-Eating Behaviour and Anxiety in Rats. Pharmacology 2021; 106:305-315. [PMID: 33756489 DOI: 10.1159/000513376] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Accepted: 11/24/2020] [Indexed: 02/05/2023]
Abstract
BACKGROUND Piperidines are biogenic amines studied mainly in toxicology because they were initially found as alkaloids from peppers and insect venoms. Piperidines are also produced in the human body, and their actions seem to be related to wakefulness/sleep and other cognitive phenomena. Piperidines have been minimally characterized for therapeutic applications. In this context, 1-Boc-piperidine-4-carboxaldehyde (1-Boc-piperidine) is a piperidine-derivative molecule with no mechanism of action reported, although its uses include the synthesis of GPR119 selective agonists that have been patented as anti-obesity drugs. OBJECTIVES The aim of this work was to study the effects of 1-Boc-piperidine on binge-eating behaviour and anxiety in Wistar rats. METHODS In experimental protocol 1, binge-eating behaviour was induced in animals that received pre-treatment (i.p.) with (i) vehicle (methanol 10%; 1 mL/kg), (ii) 1-Boc-piperidine (1 µmol kg-1), or (iii) 1-Boc-piperidine (10 µmol kg-1). In experimental protocol 2, mildly stressed animals were evaluated in the elevated plus maze under the acute effects of the pre-treatments applied in experimental protocol 1. RESULTS AND CONCLUSIONS 1-Boc-piperidine decreased, in a dose-dependent manner, the intake of calories from a succulent hyper-caloric food in a binge-eating protocol in female rats, whereas the acute exposition to this piperidine exerted an anxiolytic effect in the male rat. In both effects, the mechanism of action remains to be characterized.
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Affiliation(s)
- Sergio Guzmán-Rodríguez
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Ciudad Universitaria, Aguascalientes, Mexico
| | - Jesús Chávez-Reyes
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Ciudad Universitaria, Aguascalientes, Mexico
| | - Priscila Vázquez-León
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Ciudad Universitaria, Aguascalientes, Mexico
| | - Marvin A Soriano-Ursúa
- Academia de Fisiología y Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina del Instituto Politécnico Nacional, Mexico City, Mexico
| | - Melvin N Rosalez
- Academia de Fisiología y Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina del Instituto Politécnico Nacional, Mexico City, Mexico
| | - Gonzalo Allende
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Ciudad Universitaria, Aguascalientes, Mexico
| | - Bruno A Marichal-Cancino
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Ciudad Universitaria, Aguascalientes, Mexico,
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Naß J, Abdelfatah S, Efferth T. Ursolic acid enhances stress resistance, reduces ROS accumulation and prolongs life span in C. elegans serotonin-deficient mutants. Food Funct 2021; 12:2242-2256. [PMID: 33596295 DOI: 10.1039/d0fo02208j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Depression and anxiety disorders contribute to the global disease burden. Ursolic acid (UA), a natural compound present in many vegetables, fruits and medicinal plants, was tested in vivo for its effect on (1) enhancing resistance to stress and (2) its effect on life span. METHODS The compound was tested for its antioxidant activity in C. elegans. Stress resistance was tested in the heat and osmotic stress assay. Additionally, the influence on normal life span was examined. RT-PCR was used to assess possible serotonin targets. RESULTS UA prolonged the life span of C. elegans. Additionally, UA significantly lowered reactive oxygen species (ROS). Molecular docking studies, PCR analysis and microscale thermophoresis (MST) supported the results that UA acts through serotonin receptors to enhance stress resistance. DISCUSSION Considering the urgent need for new and safe medications in the treatment of depression and anxiety disorders, our results indicate that UA may be a promising new drug candidate.
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Affiliation(s)
- Janine Naß
- Department of Pharmaceutical Biology, Institute of Biochemistry and Pharmacy, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany.
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Tempio A, Niso M, Laera L, Trisolini L, Favia M, Ciranna L, Marzulli D, Petrosillo G, Pierri CL, Lacivita E, Leopoldo M. Mitochondrial Membranes of Human SH-SY5Y Neuroblastoma Cells Express Serotonin 5-HT 7 Receptor. Int J Mol Sci 2020; 21:ijms21249629. [PMID: 33348850 PMCID: PMC7766962 DOI: 10.3390/ijms21249629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/10/2020] [Accepted: 12/13/2020] [Indexed: 12/13/2022] Open
Abstract
Mitochondria in neurons contribute to energy supply, the regulation of synaptic transmission, Ca2+ homeostasis, neuronal excitability, and stress adaptation. In recent years, several studies have highlighted that the neurotransmitter serotonin (5-HT) plays an important role in mitochondrial biogenesis in cortical neurons, and regulates mitochondrial activity and cellular function in cardiomyocytes. 5-HT exerts its diverse actions by binding to cell surface receptors that are classified into seven distinct families (5-HT1 to 5-HT7). Recently, it was shown that 5-HT3 and 5-HT4 receptors are located on the mitochondrial membrane and participate in the regulation of mitochondrial function. Furthermore, it was observed that activation of brain 5-HT7 receptors rescued mitochondrial dysfunction in female mice from two models of Rett syndrome, a rare neurodevelopmental disorder characterized by severe behavioral and physiological symptoms. Our Western blot analyses performed on cell-lysate and purified mitochondria isolated from neuronal cell line SH-SY5Y showed that 5-HT7 receptors are also expressed into mitochondria. Maximal binding capacity (Bmax) obtained by Scatchard analysis on purified mitochondrial membranes was 0.081 pmol/mg of 5-HT7 receptor protein. Lastly, we evaluated the effect of selective 5-HT7 receptor agonist LP-211 and antagonist (inverse agonist) SB-269970 on mitochondrial respiratory chain (MRC) cytochrome c oxidase activity on mitochondria from SH-SY5Y cells. Our findings provide the first evidence that 5-HT7 receptor is also expressed in mitochondria.
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Affiliation(s)
- Alessandra Tempio
- Dipartimento di Scienze Biomediche e Biotecnologiche, Università degli Studi di Catania, via S. Sofia 97, 95123 Catania, Italy; (A.T.); (L.C.)
- Biofordrug srl, via Dante 99, 70019 Triggiano (Bari), Italy
| | - Mauro Niso
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70125 Bari, Italy; (M.N.); (M.F.)
| | - Luna Laera
- Dipartimento di Bioscienze, Biotecnologie e Biofarmaceutica, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70125 Bari, Italy; (L.L.); (L.T.); (C.L.P.)
| | - Lucia Trisolini
- Dipartimento di Bioscienze, Biotecnologie e Biofarmaceutica, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70125 Bari, Italy; (L.L.); (L.T.); (C.L.P.)
| | - Maria Favia
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70125 Bari, Italy; (M.N.); (M.F.)
- Dipartimento di Bioscienze, Biotecnologie e Biofarmaceutica, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70125 Bari, Italy; (L.L.); (L.T.); (C.L.P.)
| | - Lucia Ciranna
- Dipartimento di Scienze Biomediche e Biotecnologiche, Università degli Studi di Catania, via S. Sofia 97, 95123 Catania, Italy; (A.T.); (L.C.)
| | - Domenico Marzulli
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies (IBIOM), National Research Council (CNR), 70126 Bari, Italy; (D.M.); (G.P.)
| | - Giuseppe Petrosillo
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies (IBIOM), National Research Council (CNR), 70126 Bari, Italy; (D.M.); (G.P.)
| | - Ciro Leonardo Pierri
- Dipartimento di Bioscienze, Biotecnologie e Biofarmaceutica, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70125 Bari, Italy; (L.L.); (L.T.); (C.L.P.)
| | - Enza Lacivita
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70125 Bari, Italy; (M.N.); (M.F.)
- Correspondence: (E.L.); (M.L.); Tel.: +39-080-544-2750 (E.L.); +39-080-544-2798 (M.L.)
| | - Marcello Leopoldo
- Biofordrug srl, via Dante 99, 70019 Triggiano (Bari), Italy
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70125 Bari, Italy; (M.N.); (M.F.)
- Correspondence: (E.L.); (M.L.); Tel.: +39-080-544-2750 (E.L.); +39-080-544-2798 (M.L.)
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Kucwaj-Brysz K, Latacz G, Podlewska S, Żesławska E, Handzlik J, Lubelska A, Satała G, Nitek W, Handzlik J. The relationship between stereochemical and both, pharmacological and ADME-Tox, properties of the potent hydantoin 5-HT 7R antagonist MF-8. Bioorg Chem 2020; 106:104466. [PMID: 33246603 DOI: 10.1016/j.bioorg.2020.104466] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 09/30/2020] [Accepted: 11/06/2020] [Indexed: 11/18/2022]
Abstract
This study concerns synthesis and evaluation of pharmacodynamic and pharmacokinetic profile for all four stereoisomers of MF-8 (5-(4-fluorophenyl)-3-(2-hydroxy-3-(4-(2-methoxyphenyl)piperazin-1-yl)propyl)-5-methylimidazolidine-2,4-dione), the previously described, highly potent 5-HT7R ligand with antidepressant activity on mice. The combination of DFT calculations of 1H NMR chemical shifts with docking and dynamic simulations, in comparison to experimental screening results, provided prediction of the configuration for one of two present stereogenic centers. The experimental data for stereoisomers (MF-8A-MF-8D) confirmed the significant impact of stereochemistry on both, 5-HT7R affinity and antagonistic action, with Ki and Kb values in the range of 3-366 nM and 0.024-99 μM, respectively. We also indicated the stereochemistry-dependent influence of the tested compounds on P-glycoprotein efflux, absorption in Caco-2 model, metabolic pathway as well as CYP3A4 and CYP2C9 activities.
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Affiliation(s)
- Katarzyna Kucwaj-Brysz
- Department of Technology and Biotechnology of Drugs, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland
| | - Gniewomir Latacz
- Department of Technology and Biotechnology of Drugs, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland
| | - Sabina Podlewska
- Department of Technology and Biotechnology of Drugs, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland; Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343 Kraków, Poland
| | - Ewa Żesławska
- Institute of Biology, Pedagogical University of Cracow, Podchorążych 2, 30-084 Kraków, Poland
| | - Jarosław Handzlik
- Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 31-155 Kraków, Poland
| | - Annamaria Lubelska
- Department of Technology and Biotechnology of Drugs, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland
| | - Grzegorz Satała
- Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343 Kraków, Poland
| | - Wojciech Nitek
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Jadwiga Handzlik
- Department of Technology and Biotechnology of Drugs, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland.
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Gao L, Yang Z, Xiong J, Hao C, Ma R, Liu X, Liu BF, Jin J, Zhang G, Chen Y. Design, Synthesis and Biological Investigation of Flavone Derivatives as Potential Multi-Receptor Atypical Antipsychotics. Molecules 2020; 25:molecules25184107. [PMID: 32911828 PMCID: PMC7571155 DOI: 10.3390/molecules25184107] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 08/26/2020] [Accepted: 08/28/2020] [Indexed: 11/17/2022] Open
Abstract
The design of a series of novel flavone derivatives was synthesized as potential broad-spectrum antipsychotics by using multi-receptor affinity strategy between dopamine receptors and serotonin receptors. Among them, 7-(4-(4-(6-fluorobenzo[d]isoxazol-3-yl) piperidin- 1-yl) butoxy)-2,2-dimethylchroman-4-one (6j) exhibited a promising preclinical profile. Compound 6j not only showed high affinity for dopamine D2, D3, and serotonin 5-HT1A, 5-HT2A receptors, but was also endowed with low to moderate activities on 5-HT2C, α1, and H1 receptors, indicating a low liability to induce side effects such as weight gain, orthostatic hypotension and QT prolongation. In vivo behavioral studies suggested that 6j has favorable effects in alleviating the schizophrenia-like symptoms without causing catalepsy. Taken together, compound 6j has the potential to be further developed as a novel atypical antipsychotic.
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Affiliation(s)
- Lanchang Gao
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; (L.G.); (Z.Y.); (J.X.); (C.H.); (X.L.); (B.-F.L.)
| | - Zhengge Yang
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; (L.G.); (Z.Y.); (J.X.); (C.H.); (X.L.); (B.-F.L.)
| | - Jiaying Xiong
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; (L.G.); (Z.Y.); (J.X.); (C.H.); (X.L.); (B.-F.L.)
| | - Chao Hao
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; (L.G.); (Z.Y.); (J.X.); (C.H.); (X.L.); (B.-F.L.)
| | - Ru Ma
- Jiangsu Key Laboratory of Marine Biological Resources and Environment, Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, School of Pharmacy, Jiangsu Ocean University, Lianyungang 222005, China; (R.M.); (J.J.)
| | - Xin Liu
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; (L.G.); (Z.Y.); (J.X.); (C.H.); (X.L.); (B.-F.L.)
| | - Bi-Feng Liu
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; (L.G.); (Z.Y.); (J.X.); (C.H.); (X.L.); (B.-F.L.)
| | - Jian Jin
- Jiangsu Key Laboratory of Marine Biological Resources and Environment, Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, School of Pharmacy, Jiangsu Ocean University, Lianyungang 222005, China; (R.M.); (J.J.)
| | - Guisen Zhang
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; (L.G.); (Z.Y.); (J.X.); (C.H.); (X.L.); (B.-F.L.)
- Jiangsu Key Laboratory of Marine Biological Resources and Environment, Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, School of Pharmacy, Jiangsu Ocean University, Lianyungang 222005, China; (R.M.); (J.J.)
- Correspondence: (G.Z.); (Y.C.); Tel.: +86-27-8779-2235 (G.Z.); +86-0518-8589-5791 (Y.C.); Fax: +86-27-8779-2170 (G.Z.)
| | - Yin Chen
- Jiangsu Key Laboratory of Marine Biological Resources and Environment, Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, School of Pharmacy, Jiangsu Ocean University, Lianyungang 222005, China; (R.M.); (J.J.)
- Correspondence: (G.Z.); (Y.C.); Tel.: +86-27-8779-2235 (G.Z.); +86-0518-8589-5791 (Y.C.); Fax: +86-27-8779-2170 (G.Z.)
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9
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Czopek A, Partyka A, Bucki A, Pawłowski M, Kołaczkowski M, Siwek A, Głuch-Lutwin M, Koczurkiewicz P, Pękala E, Jaromin A, Tyliszczak B, Wesołowska A, Zagórska A. Impact of N-Alkylamino Substituents on Serotonin Receptor (5-HTR) Affinity and Phosphodiesterase 10A (PDE10A) Inhibition of Isoindole-1,3-dione Derivatives. Molecules 2020; 25:molecules25173868. [PMID: 32854402 PMCID: PMC7504677 DOI: 10.3390/molecules25173868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 08/22/2020] [Accepted: 08/23/2020] [Indexed: 11/16/2022] Open
Abstract
In this study, a series of compounds derived from 4-methoxy-1H-isoindole-1,3(2H)-dione, potential ligands of phosphodiesterase 10A and serotonin receptors, were investigated as potential antipsychotics. A library of 4-methoxy-1H-isoindole-1,3(2H)-dione derivatives with various amine moieties was synthesized and examined for their phosphodiesterase 10A (PDE10A)-inhibiting properties and their 5-HT1A and 5-HT7 receptor affinities. Based on in vitro studies, the most potent compound, 18 (2-[4-(1H-benzimidazol-2-yl)butyl]-4-methoxy-1H-isoindole-1,3(2H)-dione), was selected and its safety in vitro was evaluated. In order to explain the binding mode of compound 18 in the active site of the PDE10A enzyme and describe the molecular interactions responsible for its inhibition, computer-aided docking studies were performed. The potential antipsychotic properties of compound 18 in a behavioral model of schizophrenia were also investigated.
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Affiliation(s)
- Anna Czopek
- Department of Medicinal Chemistry, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland; (A.B.); (M.P.); (M.K.); (A.Z.)
- Correspondence: ; Tel.: +48-12-620-5450
| | - Anna Partyka
- Department of Clinical Pharmacy, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland; (A.P.); (A.W.)
| | - Adam Bucki
- Department of Medicinal Chemistry, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland; (A.B.); (M.P.); (M.K.); (A.Z.)
| | - Maciej Pawłowski
- Department of Medicinal Chemistry, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland; (A.B.); (M.P.); (M.K.); (A.Z.)
| | - Marcin Kołaczkowski
- Department of Medicinal Chemistry, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland; (A.B.); (M.P.); (M.K.); (A.Z.)
| | - Agata Siwek
- Department of Pharmacobiology, Jagiellonian University Collegium Medicum, 9 Medyczna Street, 30-688 Krakow, Poland; (A.S.); (M.G.-L.)
| | - Monika Głuch-Lutwin
- Department of Pharmacobiology, Jagiellonian University Collegium Medicum, 9 Medyczna Street, 30-688 Krakow, Poland; (A.S.); (M.G.-L.)
| | - Paulina Koczurkiewicz
- Department of Pharmaceutical Biochemistry, Jagiellonian University Collegium Medicum, 9 Medyczna Street, 30-688 Krakow, Poland; (P.K.); (E.P.)
| | - Elżbieta Pękala
- Department of Pharmaceutical Biochemistry, Jagiellonian University Collegium Medicum, 9 Medyczna Street, 30-688 Krakow, Poland; (P.K.); (E.P.)
| | - Anna Jaromin
- Department of Lipids and Liposomes, Faculty of Biotechnology, University of Wroclaw, 14a Joliot-Curie, 50-383 Wroclaw, Poland;
| | - Bożena Tyliszczak
- Faculty of Materials Engineering and Physics, Cracow University of Technology, Institute of Materials Science, 24 Warszawska Street, 31-155 Krakow, Poland;
| | - Anna Wesołowska
- Department of Clinical Pharmacy, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland; (A.P.); (A.W.)
| | - Agnieszka Zagórska
- Department of Medicinal Chemistry, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland; (A.B.); (M.P.); (M.K.); (A.Z.)
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10
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Śliwa P, Kurczab R, Kafel R, Drabczyk A, Jaśkowska J. Recognition of repulsive and attractive regions of selected serotonin receptor binding site using FMO-EDA approach. J Mol Model 2019; 25:114. [PMID: 30955095 DOI: 10.1007/s00894-019-3995-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 03/14/2019] [Indexed: 12/28/2022]
Abstract
The complexes of selected long-chain arylpiperazines with homology models of 5-HT1A, 5-HT2A, and 5-HT7 receptors were investigated using quantum mechanical methods. The molecular geometries of the ligand-receptor complexes were firstly optimized with the Our own N-layered Integrated molecular Orbital and molecular Mechanics (ONIOM) method. Next, the fragment molecular orbitals method with an energy decomposition analysis scheme (FMO-EDA) was employed to estimate the interaction energies in binding sites. The results clearly showed that orthosteric binding sites of studied serotonin receptors have both attractive and repulsive regions. In the case of 5-HT1A and 5-HT2A two repulsive areas, located in the lower part of the binding pocket, and one large area of attraction engaging many residues at the top of all helices were identified. Additionally, for the 5-HT7 receptor, the third area of destabilization located at the extracellular end of the helix 6 was found.
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Affiliation(s)
- Paweł Śliwa
- Faculty of Chemical Engineering and Technology, Cracow University of Technology, 24 Warszawska, 31-155, Kraków, Poland.
| | - Rafał Kurczab
- Department of Medicinal Chemistry, Institute of Pharmacology, Polish Academy of Sciences, 12 Smȩtna, 31-343, Kraków, Poland
| | - Rafał Kafel
- Department of Medicinal Chemistry, Institute of Pharmacology, Polish Academy of Sciences, 12 Smȩtna, 31-343, Kraków, Poland
| | - Anna Drabczyk
- Faculty of Chemical Engineering and Technology, Cracow University of Technology, 24 Warszawska, 31-155, Kraków, Poland
| | - Jolanta Jaśkowska
- Faculty of Chemical Engineering and Technology, Cracow University of Technology, 24 Warszawska, 31-155, Kraków, Poland
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11
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Yang X, Huang G, Xu M, Zhang C, Cheng Y. Molecular cloning and functional expression of the 5-HT 7 receptor in Chinese mitten crab (Eriocheir sinensis). Comp Biochem Physiol B Biochem Mol Biol 2018; 226:10-17. [PMID: 30110659 DOI: 10.1016/j.cbpb.2018.07.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Revised: 07/23/2018] [Accepted: 07/30/2018] [Indexed: 11/18/2022]
Abstract
Serotonin (5-HT) regulates numerous physiological functions and processes, such as light adaptation, food intake and ovarian maturation, and plays the role through 5-HT receptors. To our knowledge, this is the first study to isolate and characterize the serotonin receptor 7 (5-HT7 receptor) cDNA encoded in Eriocheir sinensis, an economically important aquaculture species in China, by performing rapid-amplification of cDNA ends. The full-length of 5-HT7 receptor gene cDNA is 2328 bp and encodes a polypeptide with 590 amino acids that are highly homologous with other crustaceans 5-HT7 receptor genes. Analysis of the deduced amino acid sequence of the 5-HT7, including 7 transmembrane domains and some common features of G protein-coupled receptors (GPCRs), indicated that 5-HT7 receptor was a member of GPCRs family. A gene expression analysis of the 5-HT7 receptor by RT-PCR revealed that the 5-HT7 receptor transcripts were widely distributed in various tissues, in which high expression levels were observed in the cranial ganglia, thoracic ganglia and intestines. Further study about the effects of photoperiods on the 5-HT7 expression in the tissues showed that a significantly increasing expression of the 5-HT7 receptor was observed in the thoracic ganglia induced by constant light. In addition, in the eyestalks, the expression levels of 5-HT7 mRNA in constant darkness and constant light were lower than control treatment. Then, the expression levels of the 5-HT7 receptor in three feeding statuses displayed that there were significantly increasing expressions in the hepatopancreas and intestines after feeding, compared with before feeding and during the feeding period. Finally, the 5-HT7 mRNA expression levels in stage III and stage IV were higher than the levels in stage I of ovarian development. Our experimental results showed that the 5-HT7 receptor structurally belongs to GPCRs, and the thoracic ganglia and eyestalks are the important tissues of the 5-HT7 receptor for light adaptation. The 5-HT7 receptor may also be involved in the physiological regulation of the hepatopancreas and intestines after ingestion in E. sinensis. In addition, the 5-HT7 receptor is involved in the process of ovarian maturation. The study provided a foundation for further research of light adaptation, digestive functions and ovarian maturation of the 5-HT7 receptor in Decapoda.
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Affiliation(s)
- Xiaozhen Yang
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China; Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China
| | - Genyong Huang
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China; Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China
| | - Minjie Xu
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China; Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China
| | - Cong Zhang
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China; Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China
| | - Yongxu Cheng
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China; Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China.
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12
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Lin Z, Smith MD, Concepcion GP, Haygood MG, Olivera BM, Light A, Schmidt EW. Modulating the Serotonin Receptor Spectrum of Pulicatin Natural Products. J Nat Prod 2017; 80:2360-2370. [PMID: 28745513 PMCID: PMC6025773 DOI: 10.1021/acs.jnatprod.7b00317] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Serotonin (5-HT) receptors are important in health and disease, but the existence of 14 subtypes necessitates selective ligands. Previously, the pulicatins were identified as ligands that specifically bound to the subtype 5-HT2B in the 500 nM to 10 μM range and that exhibited in vitro effects on cultured mouse neurons. Here, we examined the structure-activity relationship of 30 synthetic and natural pulicatin derivatives using binding, receptor functionality, and in vivo assays. The results reveal the 2-arylthiazoline scaffold as a tunable serotonin receptor-targeting pharmacophore. Tests in mice show potential antiseizure and antinociceptive activities at high doses without motor impairment.
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Affiliation(s)
- Zhenjian Lin
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112 USA
| | - Misty D. Smith
- Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, Utah 84112 USA
- School of Dentistry, University of Utah, Salt Lake City, UT 84112 USA
| | - Gisela P. Concepcion
- Marine Science Institute, University of the Philippines, Diliman, Quezon City 1101 Philippines
| | - Margo G. Haygood
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112 USA
| | | | - Alan Light
- Department of Anesthesiology, University of Utah, Salt Lake City, Utah 84112 USA
| | - Eric W. Schmidt
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112 USA
- Department of Biology, University of Utah, Salt Lake City, Utah 84112 USA
- To whom correspondence should be addressed. Phone: (801) 585-5234. Fax: (801) 585-9119.
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13
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Mechaly AS, Richardson E, Rinkwitz S. Activity of etv5a and etv5b genes in the hypothalamus of fasted zebrafish is influenced by serotonin. Gen Comp Endocrinol 2017; 246:233-240. [PMID: 28041791 DOI: 10.1016/j.ygcen.2016.12.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 12/03/2016] [Accepted: 12/19/2016] [Indexed: 11/28/2022]
Abstract
Serotonin has been implicated in the inhibition of food intake in vertebrates. However, the mechanisms through which serotonin acts has yet to be elucidated. Recently, ETV5 (ets variant gene 5) has been associated with obesity and food intake control mechanisms in mammals. We have analyzed a putative physiological function of the two etv5 paralogous genes (etv5a and etv5b) in neuronal food intake control in adult zebrafish that have been exposed to different nutritional conditions. A feeding assay was established and fluoxetine, a selective serotonin re-uptake inhibitor (SSRI), was applied. Gene expression changes in the hypothalamus were determined using real-time PCR. Fasting induced an up-regulation of etv5a and etv5b in the hypothalamus, whereas increased serotonin levels in the fasted fish counteracted the increase in expression. To investigate potential mechanisms the expression of further food intake control genes was determined. The results show that an increase of serotonin in fasting fish causes a reduction in the activity of genes stimulating food intake. This is in line with a previously demonstrated anorexigenic function of serotonin. Our results suggest that obesity-associated ETV5 has a food intake stimulating function and that this function is modulated through serotonin.
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Affiliation(s)
- Alejandro S Mechaly
- Dept. of Physiology, Sydney Medical School, University of Sydney, Camperdown 2050, Australia.
| | - Ebony Richardson
- Dept. of Physiology, Sydney Medical School, University of Sydney, Camperdown 2050, Australia
| | - Silke Rinkwitz
- Dept. of Physiology, Sydney Medical School, University of Sydney, Camperdown 2050, Australia.
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14
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González-Vera JA, Medina RA, Martín-Fontecha M, Gonzalez A, de la Fuente T, Vázquez-Villa H, García-Cárceles J, Botta J, McCormick PJ, Benhamú B, Pardo L, López-Rodríguez ML. A new serotonin 5-HT 6 receptor antagonist with procognitive activity - Importance of a halogen bond interaction to stabilize the binding. Sci Rep 2017; 7:41293. [PMID: 28117458 PMCID: PMC5259792 DOI: 10.1038/srep41293] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 12/16/2016] [Indexed: 12/13/2022] Open
Abstract
Serotonin 5-HT6 receptor has been proposed as a promising therapeutic target for cognition enhancement though the development of new antagonists is still needed to validate these molecules as a drug class for the treatment of Alzheimer's disease and other pathologies associated with memory deficiency. As part of our efforts to target the 5-HT6 receptor, new benzimidazole-based compounds have been designed and synthesized. Site-directed mutagenesis and homology models show the importance of a halogen bond interaction between a chlorine atom of the new class of 5-HT6 receptor antagonists identified herein and a backbone carbonyl group in transmembrane domain 4. In vitro pharmacological characterization of 5-HT6 receptor antagonist 7 indicates high affinity and selectivity over a panel of receptors including 5-HT2B subtype and hERG channel, which suggests no major cardiac issues. Compound 7 exhibited in vivo procognitive activity (1 mg/kg, ip) in the novel object recognition task as a model of memory deficit.
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Affiliation(s)
- Juan A. González-Vera
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - Rocío A. Medina
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - Mar Martín-Fontecha
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - Angel Gonzalez
- Laboratori de Medicina Computacional, Unitat de Bioestadística, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain
| | - Tania de la Fuente
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - Henar Vázquez-Villa
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - Javier García-Cárceles
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - Joaquín Botta
- School of Pharmacy, University of East Anglia, NR4 7TJ Norwich, UK
| | | | - Bellinda Benhamú
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - Leonardo Pardo
- Laboratori de Medicina Computacional, Unitat de Bioestadística, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain
| | - María L. López-Rodríguez
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
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15
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Vass M, Jójárt B, Bogár F, Paragi G, Keserű GM, Tarcsay Á. Dynamics and structural determinants of ligand recognition of the 5-HT6 receptor. J Comput Aided Mol Des 2015; 29:1137-49. [PMID: 26572911 DOI: 10.1007/s10822-015-9883-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 11/07/2015] [Indexed: 11/25/2022]
Abstract
In order to identify molecular models of the human 5-HT6 receptor suitable for virtual screening, homology modeling and membrane-embedded molecular dynamics simulations were performed. Structural requirements for robust enrichment were assessed by an unbiased chemometric analysis of enrichments from retrospective virtual screening studies. The two main structural features affecting enrichment are the outward movement of the second extracellular loop and the formation of a hydrophobic cavity deep in the binding site. These features appear transiently in the trajectories and furthermore the stretches of uniformly high enrichment may only last 4-10 ps. The formation of the inner hydrophobic cavity was also linked to the active-like to inactive-like transition of the receptor, especially the so-called connector region. The best structural models provided significant and robust enrichment over three independent ligand sets.
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Affiliation(s)
- Márton Vass
- Discovery Chemistry, Gedeon Richter Plc., Gyömrői út 19-21, Budapest, 1103, Hungary
- Division of Medicinal Chemistry, Faculty of Science, Amsterdam Institute for Molecules, Medicines and Systems (AIMMS), VU University Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands
| | - Balázs Jójárt
- Department of Chemical Informatics, Faculty of Education, University of Szeged, Boldogasszony sgt. 6, Szeged, 6725, Hungary
| | - Ferenc Bogár
- MTA SZTE Supramolecular and Nanostructured Materials Research Group, Hungarian Academy of Sciences, University of Szeged, Dóm tér 8, Szeged, 6720, Hungary
| | - Gábor Paragi
- MTA SZTE Supramolecular and Nanostructured Materials Research Group, Hungarian Academy of Sciences, University of Szeged, Dóm tér 8, Szeged, 6720, Hungary
- Department of Theoretical Chemistry, VU University Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands
| | - György M Keserű
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, Budapest, 1117, Hungary
| | - Ákos Tarcsay
- Discovery Chemistry, Gedeon Richter Plc., Gyömrői út 19-21, Budapest, 1103, Hungary.
- ChemAxon Ltd., Záhony Str. 7, Budapest, 1031, Hungary.
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16
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Abstract
Serotonin receptors are prevalent throughout the nervous system and the periphery, and remain one of the most lucrative and promising drug discovery targets for disorders ranging from migraine headaches to neuropsychiatric disorders such as schizophrenia and depression. There are 14 distinct serotonin receptors, of which 13 are G protein-coupled receptors (GPCRs), which are targets for approximately 40% of the approved medicines. Recent crystallographic and biochemical evidence has provided a converging understanding of the basic structure and functional mechanics of GPCR activation. Currently, two GPCR crystal structures exist for the serotonin family, the 5-HT1B and 5-HT2B receptor, with the antimigraine and valvulopathic drug ergotamine bound. The first serotonin crystal structures not only provide the first evidence of serotonin receptor topography but also provide mechanistic explanations into functional selectivity or biased agonism. This review will detail the findings of these crystal structures from a molecular and mutagenesis perspective for driving rational drug design for novel therapeutics incorporating biased signaling.
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MESH Headings
- Allosteric Site
- Animals
- Ergotamine/pharmacology
- Ergotamine/therapeutic use
- GTP-Binding Proteins/physiology
- Heart Valve Diseases/drug therapy
- Heart Valve Diseases/metabolism
- Humans
- Migraine Disorders/drug therapy
- Migraine Disorders/metabolism
- Models, Molecular
- Protein Conformation
- Receptor, Serotonin, 5-HT1B/chemistry
- Receptor, Serotonin, 5-HT1B/metabolism
- Receptor, Serotonin, 5-HT2B/chemistry
- Receptor, Serotonin, 5-HT2B/metabolism
- Receptors, Serotonin/chemistry
- Receptors, Serotonin/metabolism
- Serotonin Receptor Agonists/pharmacology
- Serotonin Receptor Agonists/therapeutic use
- Signal Transduction
- Vasoconstrictor Agents/pharmacology
- Vasoconstrictor Agents/therapeutic use
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Affiliation(s)
- John D McCorvy
- Department of Pharmacology and Division of Chemical Biology and Medicinal Chemistry, University of North Carolina Chapel Hill Medical School, Chapel Hill, NC 27514, USA
| | - Bryan L Roth
- Department of Pharmacology and Division of Chemical Biology and Medicinal Chemistry, University of North Carolina Chapel Hill Medical School, Chapel Hill, NC 27514, USA
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17
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Ivanenkov YA, Majouga AG, Veselov MS, Chufarova NV, Baranovsky SS, Filkov GI. Computational approaches to the design of novel 5-HT6 R ligands. Rev Neurosci 2014; 25:451-67. [PMID: 24867282 DOI: 10.1515/revneuro-2014-0030] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Accepted: 04/19/2014] [Indexed: 01/13/2023]
Abstract
5-Hydroxytryptamine (5-HT, serotonin) subtype 6 receptor (5-HT6 receptor, 5-HT6 R) belongs to a 5-HT subclass of a relatively wide G protein-coupled receptor (GPCR) family. Accumulated biological data indicate that 5-HT6 R antagonists and agonists have a great potential for the treatment of neuropathological disorders, such as Parkinson's disease, Alzheimer's disease, and schizophrenia. A number of painstaking efforts have been made toward the design of novel 5-HT6 R ligands; however, there are still no drugs that successfully passed all the clinical trials and entered the market, except for several multimodal ligands. Novel active molecules are strongly needed to progress this development forward. The in silico drug design has some benefits compared with the other rough approaches in terms of thoroughness and predictive accuracy; therefore, it can be effectively used as a solid foundation for the design of novel 5-HT6 R ligands with high potency and selectivity. Here, we provide an overview of the reported computational approaches to the design of novel 5-HT6 R ligands.
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18
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Vleugels R, Lenaerts C, Vanden Broeck J, Verlinden H. Signalling properties and pharmacology of a 5-HT7 -type serotonin receptor from Tribolium castaneum. Insect Mol Biol 2014; 23:230-243. [PMID: 24330075 DOI: 10.1111/imb.12076] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In the last decade, genome sequence data and gene structure information on invertebrate receptors has been greatly expanded by large sequencing projects and cloning studies. This information is of great value for the identification of receptors; however, functional and pharmacological data are necessary for an accurate receptor classification and for practical applications. In insects, an important group of neurotransmitter and neurohormone receptors, for which ample sequence information is available but pharmacological information is missing, are the biogenic amine G protein-coupled receptors (GPCRs). In the present study, we investigated the sequence information, pharmacology and signalling properties of a 5-HT7 -type serotonin receptor from the red flour beetle, Tribolium castaneum (Trica5-HT7 ). The receptor encoding cDNA shows considerable sequence similarity with cognate 5-HT7 receptors and phylogenetic analysis also clusters the receptor within this 5-HT receptor group. Real-time reverse transcription PCR demonstrated high expression levels in the brain, indicating the possible importance of this receptor in neural processes. Trica5-HT7 was dose-dependently activated by 5-HT, which induced elevated intracellular cyclic AMP levels but had no effect on calcium signalling. The synthetic agonists, α-methyl 5-HT, 5-methoxytryptamine, 5-carboxamidotryptamine and 8-hydroxy-2-(dipropylamino)tetralin hydrobromide, showed a response, although with a much lower potency and efficacy than 5-HT. Ketanserin and methiothepin were the most potent antagonists. Both showed characteristics of competitive inhibition on Trica5-HT7 . The signalling pathway and pharmacological profile offer important information that will facilitate functional and comparative studies of 5-HT receptors in insects and other invertebrates. The pharmacology of invertebrate 5-HT receptors differs considerably from that of vertebrates. The present study may therefore contribute to establishing a more reliable classification of invertebrate 5-HT receptors.
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Affiliation(s)
- R Vleugels
- Laboratory for Molecular Developmental Physiology and Signal Transduction, Department of Animal Physiology and Neurobiology, Zoological Institute, KU Leuven, Leuven, Belgium
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Sams M, Silye R, Göhring J, Muresan L, Schilcher K, Jacak J. Spatial cluster analysis of nanoscopically mapped serotonin receptors for classification of fixed brain tissue. J Biomed Opt 2014; 19:011021. [PMID: 24297043 DOI: 10.1117/1.jbo.19.1.011021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Accepted: 10/14/2013] [Indexed: 06/02/2023]
Abstract
We present a cluster spatial analysis method using nanoscopic dSTORM images to determine changes in protein cluster distributions within brain tissue. Such methods are suitable to investigate human brain tissue and will help to achieve a deeper understanding of brain disease along with aiding drug development. Human brain tissue samples are usually treated postmortem via standard fixation protocols, which are established in clinical laboratories. Therefore, our localization microscopy-based method was adapted to characterize protein density and protein cluster localization in samples fixed using different protocols followed by common fluorescent immunohistochemistry techniques. The localization microscopy allows nanoscopic mapping of serotonin 5-HT1A receptor groups within a two-dimensional image of a brain tissue slice. These nanoscopically mapped proteins can be confined to clusters by applying the proposed statistical spatial analysis. Selected features of such clusters were subsequently used to characterize and classify the tissue. Samples were obtained from different types of patients, fixed with different preparation methods, and finally stored in a human tissue bank. To verify the proposed method, samples of a cryopreserved healthy brain have been compared with epitope-retrieved and paraffin-fixed tissues. Furthermore, samples of healthy brain tissues were compared with data obtained from patients suffering from mental illnesses (e.g., major depressive disorder). Our work demonstrates the applicability of localization microscopy and image analysis methods for comparison and classification of human brain tissues at a nanoscopic level. Furthermore, the presented workflow marks a unique technological advance in the characterization of protein distributions in brain tissue sections.
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Affiliation(s)
- Michael Sams
- Upper Austria University of Applied Sciences, Campus Linz, Garnisonstrasse 21, 4020 Linz, Austria
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20
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García-Iglesias BB, Mendoza-Garrido ME, Gutiérrez-Ospina G, Rangel-Barajas C, Noyola-Díaz M, Terrón JA. Sensitization of restraint-induced corticosterone secretion after chronic restraint in rats: involvement of 5-HT₇ receptors. Neuropharmacology 2013; 71:216-27. [PMID: 23542440 PMCID: PMC3838668 DOI: 10.1016/j.neuropharm.2013.03.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 03/04/2013] [Accepted: 03/18/2013] [Indexed: 01/09/2023]
Abstract
Serotonin (5-HT) modulates the hypothalamic-pituitary-adrenal (HPA) axis response to stress. We examined the effect of chronic restraint stress (CRS; 20 min/day) as compared to control (CTRL) conditions for 14 days, on: 1) restraint-induced ACTH and corticosterone (CORT) secretion in rats pretreated with vehicle or SB-656104 (a 5-HT₇ receptor antagonist); 2) 5-HT₇ receptor-like immunoreactivity (5-HT₇-LI) and protein in the hypothalamic paraventricular nucleus (PVN) and adrenal glands (AG); 3) baseline levels of 5-HT and 5-hydroxyindolacetic acid (5-HIAA), and 5-HIAA/5-HT ratio in PVN and AG; and 4) 5-HT-like immunoreactivity (5-HT-LI) in AG and tryptophan hydroxylase (TPH) protein in PVN and AG. On day 15, animals were subdivided into Treatment and No treatment groups. Treatment animals received an i.p. injection of vehicle or SB-656104; No Treatment animals received no injection. Sixty min later, Treatment animals were either decapitated with no further stress (0 min) or submitted to acute restraint (10, 30, 60 or 120 min); hormone serum levels were measured. No Treatment animals were employed for the rest of measurements. CRS decreased body weight gain and increased adrenal weight. In CTRL animals, acute restraint increased ACTH and CORT secretion in a time of restraint-dependent manner; both responses were inhibited by SB-656104. Exposure to CRS abolished ACTH but magnified CORT responses to restraint as compared to CTRL conditions; SB-656104 had no effect on ACTH levels but significantly inhibited sensitized CORT responses. In CTRL animals, 5-HT₇-LI was detected in magnocellular and parvocellular subdivisions of PVN and sparsely in adrenal cortex. Exposure to CRS decreased 5-HT₇-LI and protein in the PVN, but increased 5-HT₇-LI in the adrenal cortex and protein in whole AG. Higher 5-HT and 5-HIAA levels were detected in PVN and AG from CRS animals but 5-HIAA/5-HT ratio increased in AG only. Finally, whereas 5-HT-LI was sparsely observed in the adrenal cortex of CTRL animals, it strongly increased in the adrenal cortex of CRS animals. No TPH protein was detected in AG from both animal groups. Results suggest that CRS promotes endocrine disruption involving decreased ACTH and sensitized CORT responses to acute restraint. This phenomenon may be associated with increased function and expression of 5-HT₇ receptors as well as 5-HT turnover in AG.
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Affiliation(s)
- Brenda B. García-Iglesias
- Departamento de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), Apartado Postal 14-740, Zacatenco 07000, Mexico City, México
| | | | - Gabriel Gutiérrez-Ospina
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México (UNAM), Mexico City, México
| | - Claudia Rangel-Barajas
- Departamento de Fisiología, Biofísica y Neurociencias, CINVESTAV-IPN, Mexico City, México
| | - Martha Noyola-Díaz
- Departamento de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), Apartado Postal 14-740, Zacatenco 07000, Mexico City, México
| | - José A. Terrón
- Departamento de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), Apartado Postal 14-740, Zacatenco 07000, Mexico City, México
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21
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Ivachtchenko A, Golovina E, Kadieva M, Mitkin O, Tkachenko S, Okun I. Synthesis of substituted diphenyl sulfones and their structure-activity relationship with the antagonism of 5-НТ6 receptors. Bioorg Med Chem 2013; 21:4614-27. [PMID: 23787290 DOI: 10.1016/j.bmc.2013.05.040] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 05/05/2013] [Accepted: 05/15/2013] [Indexed: 11/17/2022]
Abstract
Substituted diphenyl sulfones (10a-n) were synthesised, and the structures were confirmed by NMR, LC-MS and X-ray crystallography. Their antagonistic activities towards 5-HT₆ receptor were assessed in a cell-based functional assay. Diphenyl sulfone 10a, in spite of being the smallest and simplest known sulfonyl-containing 5-HT₆R antagonist, showed a strong potency (Ki=1.6 μM). Its derivative with a methylamine substituent, 10g (N-methyl-2-(phenylsulfonyl)aniline), was ∼66-times as active as diphenyl sulfone (Ki=24.3 nM). Addition of a piperazinyl moiety in the para-position relative to the sulfonyl group in compound 10m (N-methyl-2-(phenylsulfonyl)-5-piperazin-1-ylaniline) led to a further 150-fold increase in potency (Ki=0.16 nM) to block the serotonin-induced response of HEK-293 cells that were stably transfected with the human recombinant 5-HT₆ receptor.
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Affiliation(s)
- Alexandre Ivachtchenko
- Department of Organic Chemistry and Department of Molecular Pharmacology, CDRI, 114401 Khimki, Moscow Reg, Russia
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22
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Palangsuntikul R, Berner H, Berger ML, Wolschann P. Holographic quantitative structure-activity relationships of tryptamine derivatives at NMDA, 5HT(1A) and 5HT(2A) receptors. Molecules 2013; 18:8799-811. [PMID: 23887721 PMCID: PMC6270498 DOI: 10.3390/molecules18088799] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 07/17/2013] [Accepted: 07/18/2013] [Indexed: 11/16/2022] Open
Abstract
Tryptamine derivatives (Ts) were found to inhibit the binding of [3H]MK-801, [3H]ketanserin and [3H]8-OH-DPAT to rat brain membranes. [3H]MK-801 labels the NMDA (N-methyl-D-aspartate) receptor, a ionotropic glutamate receptor which controls synaptic plasticity and memory function in the brain, whereas [3H]ketanserin and [3H]8-OH-DPAT label 5HT2A and 5HT1A receptors, respectively. The inhibitory potencies of 64 Ts (as given by IC50 values) were correlated with their structural properties by using the Holographic QSAR procedure (HQSAR). This method uses structural fragments and connectivities as descriptors which were encoded in a hologram thus avoiding the usual problems with conformation and alignment of the structures. Four correlation equations with high predictive ability and appropriate statistical test values could be established. The results are visualized by generation of maps reflecting the contribution of individual structural parts to the biological activities.
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Affiliation(s)
- Rungtiva Palangsuntikul
- Biological Engineering Program, Faculty of Enigineering, King Mongkut's University of Technology Thonburi, Bangmod Campus, Bangkok 10140, Thailand.
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23
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Zamanian M, Agbedanu PN, Wheeler NJ, McVeigh P, Kimber MJ, Day TA. Novel RNAi-mediated approach to G protein-coupled receptor deorphanization: proof of principle and characterization of a planarian 5-HT receptor. PLoS One 2012; 7:e40787. [PMID: 22815820 PMCID: PMC3399857 DOI: 10.1371/journal.pone.0040787] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 06/13/2012] [Indexed: 11/18/2022] Open
Abstract
G protein-coupled receptors (GPCRs) represent the largest known superfamily of membrane proteins extending throughout the Metazoa. There exists ample motivation to elucidate the functional properties of GPCRs given their role in signal transduction and their prominence as drug targets. In many target organisms, these efforts are hampered by the unreliable nature of heterologous receptor expression platforms. We validate and describe an alternative loss-of-function approach for ascertaining the ligand and G protein coupling properties of GPCRs in their native cell membrane environment. Our efforts are focused on the phylum Platyhelminthes, given the heavy health burden exacted by pathogenic flatworms, as well as the role of free-living flatworms as model organisms for the study of developmental biology. RNA interference (RNAi) was used in conjunction with a biochemical endpoint assay to monitor cAMP modulation in response to the translational suppression of individual receptors. As proof of principle, this approach was used to confirm the neuropeptide GYIRFamide as the cognate ligand for the planarian neuropeptide receptor GtNPR-1, while revealing its endogenous coupling to Gαi/o. The method was then extended to deorphanize a novel Gαs-coupled planarian serotonin receptor, DtSER-1. A bioinformatics protocol guided the selection of receptor candidates mediating 5-HT-evoked responses. These results provide functional data on a neurotransmitter central to flatworm biology, while establishing the great potential of an RNAi-based deorphanization protocol. Future work can help optimize and adapt this protocol for higher-throughput platforms as well as other phyla.
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Affiliation(s)
- Mostafa Zamanian
- Neuroscience Program, Iowa State University, Ames, Iowa, United States of America.
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24
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Sukalovic V, Ignjatovic D, Tovilovic G, Andric D, Shakib K, Kostic-Rajacic S, Soskic V. Interactions of N-{[2-(4-phenyl-piperazin-1-yl)-ethyl]-phenyl}-2-aryl-2-yl-acetamides and 1-{[2-(4-phenyl-piperazin-1-yl)-ethyl]-phenyl}-3-aryl-2-yl-ureas with dopamine D2 and 5-hydroxytryptamine 5HT(1A) receptors. Bioorg Med Chem Lett 2012; 22:3967-72. [PMID: 22607670 DOI: 10.1016/j.bmcl.2012.04.098] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Revised: 04/15/2012] [Accepted: 04/20/2012] [Indexed: 11/18/2022]
Abstract
It is suggested that the ratio of dopamine D(2) to 5-hydroxytryptamine 5-HT(1A) activity is an important parameter that determines the efficiency of antipsychotic drugs. Here we present the synthesis of N-{[2-(4-phenyl-piperazin-1-yl)-ethyl]-phenyl}-2-aryl-2-yl-acetamides and 1-{[2-(4-phenyl-piperazin-1-yl)-ethyl]-phenyl}-3-aryl-2-yl-ureas and their structure-activity relationship studies on dopamine D(2) and 5-hydrohytryptamine 5-HT(1A) receptors. It was shown that ligand selectivity and affinity strongly depends on their topology and the presence of a pyridyl group in the head of molecules. Molecular modeling studies using homology modeling and docking simulation revealed a rational explanation for the ligand behavior. The observed binding modes and receptor-ligand interactions provided us with a clue for optimizing the optimal selectivity towards 5-HT(1A) receptors.
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Affiliation(s)
- Vladimir Sukalovic
- ICTM-Department of Chemistry, University of Belgrade, Njegoseva 12, 11000 Belgrade, Serbia
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25
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Gellynck E, Andressen KW, Lintermans B, Haegeman G, Levy FO, Vanhoenacker P, Van Craenenbroeck K. Biochemical and pharmacological study of N-linked glycosylation of the human serotonin 5-HT₇a receptor. FEBS J 2012; 279:1994-2003. [PMID: 22448645 DOI: 10.1111/j.1742-4658.2012.08581.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The 5-hydroxytryptamine (5-HT)(7(a)) receptor is a G-protein-coupled receptor critically involved in human psychiatric and neurological disorders. In the present study, we evaluate the presence and the functional role of N-glycosylation of the human 5-HT(7) receptor. Western blot analysis of HEK293T cells transiently expressing the 5-HT(7(a)) receptor in the presence of tunicamycin gave rise to a band shift, indicating the existence of an N-glycosylated form of the 5-HT(7(a)) receptor. To further investigate this, we mutated the two predicted N-glycosylation sites (N5Q and N66Q) and compared the molecular mass of the immunoreactive bands with those of the wild-type receptor, indicating that both asparagines were N-glycosylated. The mutant receptors had the same binding affinity for [(3) H]5-CT and the same potency and efficacy with regard to 5-HT-induced activation of adenylyl cyclase. However, there was a reduction in maximal ligand binding for the single and double mutants compared to the wild-type receptor. Next, membrane labelling and immunocytochemical studies demonstrated that the N-glycosylation mutants were expressed at the cell surface. We conclude that N-glycosylation is not important for cell surface expression of the 5-HT(7) receptor.
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Affiliation(s)
- Evelien Gellynck
- Laboratory for Eukaryotic Gene Expression and Signal Transduction (LEGEST), Ghent University, Belgium
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26
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Lee BS, Jun IG, Kim SH, Park JY. Interaction of morphine and selective serotonin receptor inhibitors in rats experiencing inflammatory pain. J Korean Med Sci 2012; 27:430-6. [PMID: 22468108 PMCID: PMC3314857 DOI: 10.3346/jkms.2012.27.4.430] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Accepted: 01/20/2012] [Indexed: 01/25/2023] Open
Abstract
Citalopram and paroxetine are selective serotonin reuptake inhibitors and also have antinociceptive effects. We investigated the antiallodynic and antihyperalgesic effects of intrathecally administered morphine, citalopram, paroxetine, and combinations thereof, in a rat model in which peripheral inflammation was induced by complete Freund's adjuvant (CFA). Drugs were intrathecally administered via direct lumbar puncture. Mechanical allodynia was measured using a Dynamic Plantar Aesthesiometer. Thermal hyperalgesia and cold allodynia were determined by measuring latency of paw withdrawal in response to radiant heat and cold water. Behavioral tests were run before and 15, 30, 45, and 60 min after intrathecal injection. Intraplantar injection of CFA produced mechanical allodynia, thermal hyperalgesia, and cold allodynia. Intrathecally administered morphine (0.3 or 1 µg) had antiallodynic or antihyperalgesic effects (24.0%-71.9% elevation). The effects of morphine were significantly increased when a combination of citalopram (100 µg) and paroxetine (100 µg) was added (35.2%-95.1% elevation). This rise was reversed by naloxone and methysergide. The effects of citalopram and paroxetine were also reversed by naloxone and methysergide. We suggest that the mu opioid receptor and serotonin receptors play major roles in production of the antiallodynic and antihyperalgesic effects of morphine, citalopram, paroxetine, and combinations thereof, in animals experiencing inflammatory pain.
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Affiliation(s)
- Byung-Sang Lee
- Department of Anesthesiology and Pain Medicine, CHA Medical Center, CHA University, Gumi, Korea
| | - In-Gu Jun
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Sung-Hoon Kim
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jong Yeon Park
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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27
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Abstract
Nicotinic and serotoninergic 5HT3 receptors share important sequence identities except for their cytoplasmic loop. Both ends of this loop display conserved 3D helical structures with distinct primary sequences. We decided to check whether these two helices named F and G play a role in the sub-cellular distribution of different nicotinic receptors. We systematically exchanged each helix with the equivalent sequence of neuronal nicotinic and alpha4, beta2 and alpha7 subunits in the functional chimeric alpha7-5HT3 receptor used as a model system. The new chimeras were expressed in vitro in polarized epithelial cells from pig kidney. We quantified synthesis and export of the receptors to the cell surface by measuring alpha-bungarotoxin binding sites. Immunogold labelling was used, at the electron microscope level, to determine the amount of each chimera present at either domain, apical and/or basolateral, of these cells. We noticed that in epithelial cells the majority of alpha-bungarotoxin binding sites remained sequestered in the cytoplasm as already observed in neurons in vivo. The majority of the pentamers present at the cell surface were located at the apical domain. Our results suggest that helix F and G differently regulate assembly and export to the cell surface of alpha-bungarotoxin binding receptors.
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MESH Headings
- Amino Acid Sequence
- Animals
- Antibodies, Monoclonal/metabolism
- Binding Sites
- Bungarotoxins/metabolism
- Cell Polarity
- Cells, Cultured
- Cytoplasm/metabolism
- Epithelial Cells/ultrastructure
- Green Fluorescent Proteins
- Hippocampus/cytology
- Hippocampus/embryology
- LLC-PK1 Cells
- Luminescent Proteins/metabolism
- Neurons/cytology
- Neurons/metabolism
- Protein Structure, Quaternary
- Protein Structure, Secondary
- Rats
- Rats, Sprague-Dawley
- Receptors, Nicotinic/chemistry
- Receptors, Nicotinic/genetics
- Receptors, Nicotinic/metabolism
- Receptors, Serotonin/chemistry
- Receptors, Serotonin/genetics
- Recombinant Proteins/chemistry
- Recombinant Proteins/metabolism
- Sequence Homology, Amino Acid
- Swine
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Affiliation(s)
- A Devillers-Thiéry
- Laboratoire Récepteurs et Cognition, Département des neuroscience, Institut Pasteur, 25 rue du Dr. Roux, 75724 Paris 15, France
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28
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Zajdel P, Marciniec K, Maślankiewicz A, Paluchowska MH, Satała G, Partyka A, Jastrzębska-Więsek M, Wróbel D, Wesołowska A, Duszyńska B, Bojarski AJ, Pawłowski M. Arene- and quinoline-sulfonamides as novel 5-HT7 receptor ligands. Bioorg Med Chem 2011; 19:6750-9. [PMID: 22001327 DOI: 10.1016/j.bmc.2011.09.044] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Revised: 09/22/2011] [Accepted: 09/23/2011] [Indexed: 12/23/2022]
Affiliation(s)
- Paweł Zajdel
- Department of Medicinal Chemistry, Jagiellonian University Medical College, Kraków, Poland.
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29
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Liu F, Majo VJ, Prabhakaran J, Milak MS, John Mann J, Parsey RV, Kumar JSD. Synthesis and in vivo evaluation of [O-methyl-11C] N-[3,5-dichloro-2-(methoxy)phenyl]-4-(methoxy)-3-(1-piperazinyl)benzenesulfonamide as an imaging probe for 5-HT6 receptors. Bioorg Med Chem 2011; 19:5255-9. [PMID: 21821420 DOI: 10.1016/j.bmc.2011.06.090] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 06/10/2011] [Accepted: 06/16/2011] [Indexed: 10/18/2022]
Abstract
The serotonin receptor 6 (5-HT(6)) is implicated in the pathophysiology of cognitive diseases, schizophrenia, anxiety and obesity and in vivo studies of this receptor would be of value for studying the pathophysiology of these disorders. Therefore, N-[3,5-dichloro-2-(methoxy)phenyl]-4-(methoxy)-3-(1-piperazinyl)benzenesulfonamide (SB399885), a selective and high affinity (pK(i)=9.11) 5-HT(6) antagonist, has been radiolabeled with carbon-11 by O-methylation of the corresponding desmethyl analogue with [(11)C]MeOTf in order to determine the suitability of [(11)C]SB399885 to quantify 5-HT(6)R in living brain using PET. Desmethyl-SB399885 was prepared, starting from 1-(2-methoxyphenyl) piperazine hydrochloride, in excellent yield. The yield obtained for radiolabeling of [(11)C]SB399885 was 30±5% (EOS) and the total synthesis time was 30min at EOB. PET studies with [(11)C]SB399885 in baboon showed fast uptake followed by rapid clearance in the brain. Highest uptake of radioactivity of [(11)C]SB399885 in baboon brain were found in temporal cortex, parahippocampal gyrus, pareital cortex, amygdala, and hippocampus. Poor brain entry and inconsistent brain uptake of [(11)C]SB399885 compared to known 5-HT(6)R distribution limits its usefulness for the in vivo quantification of 5-HT(6)R with PET.
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Affiliation(s)
- Fei Liu
- Division of Substance Abuse, Department of Psychiatry, Columbia University Medical Center, New York, NY, USA
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30
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Abstract
Although the cardinal manifestations of Parkinson's disease (PD) are attributed to a decline in dopamine levels in the striatum, a breadth of non-motor features and treatment-related complications in which the serotonergic system plays a pivotal role are increasingly recognised. Serotonin (5-HT)-mediated neurotransmission is altered in PD and the roles of the different 5-HT receptor subtypes in disease manifestations have been investigated. The aims of this article are to summarise and discuss all published preclinical and clinical studies that have investigated the serotonergic system in PD and related animal models, in order to recapitulate the state of the current knowledge and to identify areas that need further research and understanding.
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Affiliation(s)
- Philippe Huot
- Toronto Western Research Institute, MCL 11-419, Toronto Western Hospital, University Health Network, 399 Bathurst Street, Toronto, Ontario, Canada M5T 2S8
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31
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Hao M, Li Y, Li H, Zhang S. Investigation of the structure requirement for 5-HT₆ binding affinity of arylsulfonyl derivatives: a computational study. Int J Mol Sci 2011; 12:5011-30. [PMID: 21954341 PMCID: PMC3179148 DOI: 10.3390/ijms12085011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Revised: 07/19/2011] [Accepted: 07/29/2011] [Indexed: 11/16/2022] Open
Abstract
5-HT6 receptor has been implicated in a series of diseases including anxiety, depression, schizophrenia and cognitive dysfunctions. 5-HT6 ligands have been reported to play a significant role in the treatment for central nervous system (CNS) diseases. Presently, a large series of 223 5-HT6 ligands were studied using a combinational method by 3D-QSAR, molecular docking and molecular dynamics calculations for further improvement of potency. The optimal 3D models exhibit satisfying statistical results with r2ncv, q2 values of 0.85 and 0.50 for CoMFA, 0.81 and 0.53 for CoMSIA, respectively. Their predictive powers were validated by external test set, showing r2pred of 0.71 and 0.76. The contour maps also provide a visual representation of contributions of steric, electrostatic, hydrophobic and hydrogen bond fields as well as the prospective binding models. In addition, the agreement between 3D-QSAR, molecular docking and molecular dynamics simulation proves the rationality of the developed models. These results, we hope, may be helpful in designing novel and potential 5-HT6 ligands.
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Affiliation(s)
- Ming Hao
- Department of Materials Science and Chemical Engineering, Dalian University of Technology, Dalian 116023, Liaoning, China; E-Mails: (M.H.); (H.L.); (S.Z.)
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32
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Lambe EK, Fillman SG, Webster MJ, Shannon Weickert C. Serotonin receptor expression in human prefrontal cortex: balancing excitation and inhibition across postnatal development. PLoS One 2011; 6:e22799. [PMID: 21829518 PMCID: PMC3146513 DOI: 10.1371/journal.pone.0022799] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Accepted: 07/05/2011] [Indexed: 12/15/2022] Open
Abstract
Serotonin and its receptors (HTRs) play critical roles in brain development and in the regulation of cognition, mood, and anxiety. HTRs are highly expressed in human prefrontal cortex and exert control over prefrontal excitability. The serotonin system is a key treatment target for several psychiatric disorders; however, the effectiveness of these drugs varies according to age. Despite strong evidence for developmental changes in prefrontal Htrs of rodents, the developmental regulation of HTR expression in human prefrontal cortex has not been examined. Using postmortem human prefrontal brain tissue from across postnatal life, we investigated the expression of key serotonin receptors with distinct inhibitory (HTR1A, HTR5A) and excitatory (HTR2A, HTR2C, HTR4, HTR6) effects on cortical neurons, including two receptors which appear to be expressed to a greater degree in inhibitory interneurons of cerebral cortex (HTR2C, HTR6). We found distinct developmental patterns of expression for each of these six HTRs, with profound changes in expression occurring early in postnatal development and also into adulthood. However, a collective look at these HTRs in terms of their likely neurophysiological effects and major cellular localization leads to a model that suggests developmental changes in expression of these individual HTRs may not perturb an overall balance between inhibitory and excitatory effects. Examining and understanding the healthy balance is critical to appreciate how abnormal expression of an individual HTR may create a window of vulnerability for the emergence of psychiatric illness.
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Affiliation(s)
- Evelyn K Lambe
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada.
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Abstract
Drug discovery in skin pharmacotherapy is an enormous, continually expanding field. Researchers are developing novel and sensitive pharmaceutical products and drugs that target specific receptors to elicit concerted and appropriate responses. The pigment-bearing cells called melanophores have a significant contribution to make in this field. Melanophores, which contain the dark brown or black pigment melanin, constitute an important class of chromatophores. They are highly specialized in the bidirectional and coordinated translocation of pigment granules when given an appropriate stimulus. The pigment granules can be stimulated to undergo rapid dispersion throughout the melanophores, making the cell appear dark, or to aggregate at the center, making the cell appear light. The major signals involved in pigment transport within the melanophores are dependent on a special class of cell surface receptors called G-protein-coupled receptors (GPCRs). Many of these receptors of adrenaline, acetylcholine, histamine, serotonin, endothelin and melatonin have been found on melanophores. They are believed to have clinical relevance to skin-related ailments and therefore have become targets for high throughput screening projects. The selective screening of these receptors requires the recognition of particular ligands, agonists and antagonists and the characterization of their effects on pigment motility within the cells. The mechanism of skin pigmentation is incredibly intricate, but it would be a considerable step forward to unravel its underlying physiological mechanism. This would provide an experimental basis for new pharmacotherapies for dermatological anomalies. The discernible stimuli that can trigger a variety of intracellular signals affecting pigment granule movement primarily include neurotransmitters and hormones. This review focuses on the role of the hormone and neurotransmitter signals involved in pigment movement in terms of the pharmacology of the specific receptors.
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MESH Headings
- Animals
- Drug Discovery
- Hypothalamic Hormones/metabolism
- Melanins/metabolism
- Melanocortins/metabolism
- Melanocyte-Stimulating Hormones/metabolism
- Melanophores/metabolism
- Pituitary Hormones/metabolism
- Receptors, Adrenergic/chemistry
- Receptors, Adrenergic/metabolism
- Receptors, Cholinergic/chemistry
- Receptors, Cholinergic/metabolism
- Receptors, Endothelin/chemistry
- Receptors, Endothelin/metabolism
- Receptors, G-Protein-Coupled/agonists
- Receptors, G-Protein-Coupled/antagonists & inhibitors
- Receptors, G-Protein-Coupled/metabolism
- Receptors, Histamine/chemistry
- Receptors, Histamine/metabolism
- Receptors, Melatonin/agonists
- Receptors, Melatonin/antagonists & inhibitors
- Receptors, Melatonin/metabolism
- Receptors, Serotonin/chemistry
- Receptors, Serotonin/metabolism
- Vertebrates
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Affiliation(s)
- Saima Salim
- Postgraduate Department of Biotechnology, Saifia College of Science Bhopal, Saifia, 462001 India
| | - Sharique A. Ali
- Postgraduate Department of Biotechnology, Saifia College of Science Bhopal, Saifia, 462001 India
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34
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35
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Tasler S, Kraus J, Wuzik A, Müller O, Aschenbrenner A, Cubero E, Pascual R, Quintana-Ruiz JR, Dordal A, Mercè R, Codony X. Discovery of 5-HT6 receptor ligands based on virtual HTS. Bioorg Med Chem Lett 2007; 17:6224-9. [PMID: 17892934 DOI: 10.1016/j.bmcl.2007.09.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2007] [Revised: 09/05/2007] [Accepted: 09/05/2007] [Indexed: 10/22/2022]
Abstract
Based on a pharmacophore alignment on a 5-HT(6) ligand applying 4SCan technology, a new lead series was identified and further structurally investigated. K(i)s down to 8 nM were achieved.
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Affiliation(s)
- Stefan Tasler
- 4SC AG, Am Klopferspitz 19a, 82152 Planegg-Martinsried, Germany.
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36
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Elokdah H, Li D, McFarlane G, Bernotas RC, Robichaud AJ, Magolda RL, Zhang GM, Smith D, Schechter LE. Novel 1-(azacyclyl)-3-arylsulfonyl-1H-pyrrolo[2,3-b]pyridines as 5-HT6 agonists and antagonists. Bioorg Med Chem 2007; 15:6208-26. [PMID: 17624788 DOI: 10.1016/j.bmc.2007.06.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2006] [Revised: 05/17/2007] [Accepted: 06/12/2007] [Indexed: 11/23/2022]
Abstract
1-Aminoethyl-3-arylsulfonyl-1H-indoles 1 are 5-HT(6) receptor ligands with modest activity in a 5-HT(6) cyclase assay. Introduction of an additional nitrogen in the indole ring provides 1-aminoethyl-3-arylsulfonyl-1H-pyrrolo[2,3-b]pyridines 2 with both enhanced 5-HT(6) affinity and cyclase activity, many acting as 5-HT(6) agonists. We constrained the basic side chain as part of a ring to make 1-(azacyclyl)-3-arylsulfonyl-1H-pyrrolo[2,3-b]pyridines incorporating a pyrrolidinyl 3 or piperidinyl 4 ring system. Preparation of compounds 3 and 4 required synthesis of the key intermediates, 1-(pyrrolidin-3-yl)-1H-pyrrolo[2,3-b]pyridines 7 and 1-(piperidin-3-yl)-1H-pyrrolo[2,3-b]pyridines 8, respectively. Intermediates 7 were prepared through alkylation of 7-azaindole while the intermediates 8 required an alternate synthesis. The compounds of both series 3 and 4 were shown to have high binding affinities for the 5-HT(6) receptor. The in vitro functional activity at the 5-HT(6) receptor varied depending on various functionalities including the selection of the arylsulfonyl, the substitution on the arylsulfonyl group, the ring size, and the substitution on the basic amine moiety producing either 5-HT(6) receptor agonists or antagonists.
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Affiliation(s)
- Hassan Elokdah
- Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, PA 19426, USA.
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37
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Dutton AC, Massoura AN, Dover TJ, Andrews NA, Barnes NM. Identification and functional significance of N-glycosylation of the 5-ht5A receptor. Neurochem Int 2007; 52:419-25. [PMID: 17881091 DOI: 10.1016/j.neuint.2007.07.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2007] [Revised: 07/16/2007] [Accepted: 07/25/2007] [Indexed: 10/23/2022]
Abstract
The presence and roles of N-glycosylation of the human (h) 5-ht(5A) receptor were investigated using a heterologous expression system. Following transient transfection of COS-7 cells with h5-ht(5A) receptor cDNA, SDS-PAGE/Western blot analysis of immunoreactivity demonstrated two protein species; a predominant species with a molecular weight of approximately 35-45 kDa and a minor species of approximately 45-55 kDa. Transfected cells grown in the presence of the N-glycosylation inhibitor tunicamycin, failed to express the minor immunoreactive species indicating this represented the N-glycosylated form of the h5-ht(5A) receptor. Comparison of the molecular weights of immunoreactive bands arising from the wild-type and each of the mutant 5-ht(5A) receptors with disruption of the predicted N-glycosylation sites (N6S and N21S) demonstrated that both identified asparagines were N-glycosylated. Immunocytochemical and ELISA studies demonstrated that the [N6S]h5-ht(5A) receptor mutation, but not the [N21S]h5-ht(5A) receptor mutation, reduced protein expression in the cell membrane, indicating that N-glycosylation of the N6 residue is important for the membrane expression of this neurotransmitter receptor; a requirement for receptor function.
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Affiliation(s)
- Alice C Dutton
- Cellular and Molecular Neuropharmacology Research Group, Division of Neuroscience, The Medical School, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
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38
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Madrid PB, Polgar WE, Toll L, Tanga MJ. Synthesis and antitubercular activity of phenothiazines with reduced binding to dopamine and serotonin receptors. Bioorg Med Chem Lett 2007; 17:3014-7. [PMID: 17407813 DOI: 10.1016/j.bmcl.2007.03.064] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2007] [Revised: 03/19/2007] [Accepted: 03/19/2007] [Indexed: 11/28/2022]
Abstract
Analogs of the psychotropic phenothiazines were synthesized and examined as antitubercular agents against Mycobacterium tuberculosis H37Rv. The compounds were subsequently counter-screened for binding to the dopaminergic-receptor subtypes D1, D2, D3 and the serotonergic-receptor subtypes 5-HT(1A), 5-HT(2A), and 5-HT(2C). The most active compounds showed MICs from 2 to 4 microg/mL and had overall reduced binding to the dopamine and serotonin receptors compared to chlorpromazine and trifluoperazine.
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Affiliation(s)
- Peter B Madrid
- Biosciences Division, SRI International, 333 Ravenswood Avenue, Menlo Park, CA 94025, USA.
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39
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Paillet-Loilier M, Fabis F, Lepailleur A, Bureau R, Butt-Gueulle S, Dauphin F, Lesnard A, Delarue C, Vaudry H, Rault S. Novel aminoethylbiphenyls as 5-HT7 receptor ligands. Bioorg Med Chem Lett 2007; 17:3018-22. [PMID: 17419056 DOI: 10.1016/j.bmcl.2007.03.054] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2007] [Revised: 03/16/2007] [Accepted: 03/19/2007] [Indexed: 01/31/2023]
Abstract
The synthesis of a series of aminoethylbiphenyls as novel 5-HT(7) receptor ligands is described. The novel derivatives exhibit high affinity for the 5-HT(7) receptor with selectivity toward 5-HT(1A) receptor.
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Affiliation(s)
- Magalie Paillet-Loilier
- Centre d'Etudes et de Recherche sur le Médicament de Normandie EA3915, Université de Caen, UFR des Sciences Pharmaceutiques, 5, rue Vaubénard 14032 Caen Cedex, France
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40
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Mancia F, Brenner-Morton S, Siegel R, Assur Z, Sun Y, Schieren I, Mendelsohn M, Axel R, Hendrickson WA. Production and characterization of monoclonal antibodies sensitive to conformation in the 5HT2c serotonin receptor. Proc Natl Acad Sci U S A 2007; 104:4303-8. [PMID: 17360519 PMCID: PMC1838597 DOI: 10.1073/pnas.0700301104] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
mAbs that are sensitive to protein conformation can be helpful in studies of protein structure and function; in particular, mAb fragments are useful reagents in membrane protein crystallization. We immunized mice with the rat 5HT2c serotonin receptor and derived clonal hybridoma cells, which we tested for specific antigen reactivity by using the complementarity of purified protein from bacteria and receptor-embedded mammalian cell membranes. Nine mAbs met our criteria for specificity, affinity, and sensitivity to conformational features. Epitopes were mapped in various additional tests. Five of the nine mAbs have cytoplasmic epitopes, and two of these are sensitive to the ligand state of the receptor. These properties should be useful both for structural analysis and in probes of function.
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Affiliation(s)
- Filippo Mancia
- *Department of Biochemistry and Molecular Biophysics and
| | | | - Risa Siegel
- *Department of Biochemistry and Molecular Biophysics and
| | - Zahra Assur
- *Department of Biochemistry and Molecular Biophysics and
| | - Yonghua Sun
- the Howard Hughes Medical Institute, Columbia University, New York, NY 10032
| | - Ira Schieren
- the Howard Hughes Medical Institute, Columbia University, New York, NY 10032
| | | | - Richard Axel
- *Department of Biochemistry and Molecular Biophysics and
- the Howard Hughes Medical Institute, Columbia University, New York, NY 10032
| | - Wayne A. Hendrickson
- *Department of Biochemistry and Molecular Biophysics and
- the Howard Hughes Medical Institute, Columbia University, New York, NY 10032
- To whom correspondence should be addressed. E-mail:
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41
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Sengupta B, Chaudhuri S, Banerjee A, Sengupta PK. Characterization of serotonin in protein and membrane mimetic environments: a spectroscopic study. Chem Biodivers 2007; 1:868-77. [PMID: 17191887 DOI: 10.1002/cbdv.200490069] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
As a first step toward using the photophysical properties of serotonin to probe its interactions with biological target sites, we have examined its interactions with human serum albumin (HSA), chosen as a surrogate for the actual receptor proteins in physiological systems, and with sodium bis(2-ethylhexyl)sulfosuccinate (AOT)/heptane/water reverse micelles, chosen as a biomembrane mimetic environment for the transmembrane portion of the receptor protein. Although the emission maximum of serotonin is relatively insensitive to the polarity of the local environment, which is attributed to lack of solvent dipolar reorientation of the 5-hydroxyindole chromophore, the fluorescence anisotropy (r) served as a useful and sensitive parameter from which the binding constants (K) and Gibbs energy changes (deltaG) were estimated for serotonin-HSA and serotonin-AOT reverse micellar interactions. Fluorescence-decay studies of serotonin show double-exponential kinetics in homogeneous aqueous solvent due to the structural heterogeneity arising from different rotamers of serotonin. In contrast, upon binding to HSA, a single-exponential fluorescence-decay profile was observed indicating the occurrence of a single structural species of serotonin in the protein environment. Furthermore, far-UV-circular-dichroism (CD) spectroscopic data indicate that the secondary structural features of HSA remain essentially intact after binding to serotonin. This preliminary research can be expected to open the door to extensive future studies on interactions of serotonin with relevant target proteins and associated cell membranes involved in its diverse physiological functions.
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Affiliation(s)
- Bidisa Sengupta
- Biophysics Division, Saha Institute of Nuclear Physics 37, Belgachia Road, Kolkata 700037, India
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42
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Kołaczkowski M, Nowak M, Pawłowski M, Bojarski AJ. Receptor-based pharmacophores for serotonin 5-HT7R antagonists-implications to selectivity. J Med Chem 2007; 49:6732-41. [PMID: 17154504 DOI: 10.1021/jm060300c] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A set of 31 diversified 5-HT7 receptor antagonists was automatically docked to a conformational ensemble of rhodopsin-based 5-HT7R models (flexible docking). It was found that ergolines, aporphines, and tricyclic psychotropic agents were always docked in a pocket formed by TMHs 4-6, and besides the main ionic bond with Asp3.32, they had specific interactions with Phe6.52, Phe6.51, Trp6.48, and Ser5.42. The arylpiperidine, arylpiperazine, or beta-carboline fragment of the complex ligands occupied the same pocket, whereas the terminal amide/imide part of those compounds reached the second cavity formed by TMHs 7-3 and interacted with Phe3.28, Arg7.36, and Tyr7.43. A similar orientation of selective antagonists of the group of arylsulfonamidoalkylamines was observed, that is, the sulfonamide part was located in the second pocket. Coherent docking results allowed the generation of two receptor-based pharmacophores: first containing features necessary for high 5-HT7R affinity and the other defining selectivity for this receptor subtype. The latter model indicated the importance of specific interactions with the residues of the TMHs 7-3 pocket (especially nonconserved Arg7.36) for selectivity over other monoamine GPCRs.
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Affiliation(s)
- Marcin Kołaczkowski
- Department of Medicinal Chemistry, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland.
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43
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Geldenhuys WJ, Van der Schyf CJ. Triquinane-based compounds as possible serotonin 5-HT6 receptor antagonists for the treatment of Alzheimer’s disease. Med Hypotheses 2007; 68:81-6. [PMID: 16962723 DOI: 10.1016/j.mehy.2006.06.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2006] [Accepted: 06/21/2006] [Indexed: 11/28/2022]
Abstract
The recently discovered serotonin 5-HT(6) receptor is a novel target for the treatment of cognitive decline associated with neurodegenerative diseases such as Alzheimer's disease (AD). Several studies have shown that antagonism of this receptor leads to improved learning and memory. Two serotonin 5-HT(6) receptor antagonists are currently in Phase II clinical trials for cognitive enhancement. Striking structural similarities between the polycyclic features of some 5-HT(6) antagonists and those of the cis-syn-cis triquinane ring system led us to propose that triquinane-derived compounds may represent a novel class of 5-HT(6) receptor antagonists. Using computational methodologies, we propose a structure with features that may impart potent 5-HT(6) receptor antagonistic activities to the triquinane ring complex. Related compounds, once synthesized, may have possible utility in the treatment of cognitive decline associated with AD.
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Affiliation(s)
- Werner J Geldenhuys
- Texas Tech University Health Sciences Center, School of Pharmacy, 1300 Coulter Drive, Amarillo, TX 79106, USA
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44
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Sikazwe D, Bondarev ML, Dukat M, Rangisetty JB, Roth BL, Glennon RA. Binding of Sulfonyl-Containing Arylalkylamines at Human 5-HT6 Serotonin Receptors. J Med Chem 2006; 49:5217-25. [PMID: 16913710 DOI: 10.1021/jm060469q] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Various sulfonyl-containing compounds (e.g. sulfonamides, sulfones) bind at human 5-HT6 serotonin receptors, but it has been difficult relating the binding mode(s) of such agents to one another, even though many possess a common SO2 moiety, to identify a common pharmacophore model(s). On the basis of the hypothesis that an ergoline-type conformation might be important for the binding of some sulfonamide-containing arylalkylamines, we prepared for examination at h5-HT6 receptors a series of compounds, including phenylethylamines 6, pyrroloethylamine 7, and phenylpiperazines 9. The results (with Ki values ranging from about 1 nM to >1000 nM) suggest that many of these agents likely bind in a related fashion, and structure-affinity studies indicate that the benzenesulfonamide portion of the phenylethylamine and phenylpiperazine analogues can be "reversed", abbreviated to a sulfone, and moved to an adjacent position with relatively little impact on affinity. Although a benzenesulfonamide (or related arylsulfonamide) group might be common to various 5-HT6 ligands, there appears to be some latitude with regard to the specific constitution and location of the sulfonamide moiety even within the same arylalkylamine structural framework. A pharmacophore model is presented to account for some of the current findings.
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Affiliation(s)
- Donald Sikazwe
- Department of Medicinal Chemistry, School of Pharmacy, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, Virginia 23298-0540, USA
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45
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Zhang J, Shen CP, Xiao JC, Lanza TJ, Lin LS, Francis BE, Fong TM, Chen RZ. Effects of mutations at conserved TM II residues on ligand binding and activation of mouse 5-HT6 receptor. Eur J Pharmacol 2006; 534:77-82. [PMID: 16612839 DOI: 10.1016/j.ejphar.2006.01.049] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
An aspartate residue (Asp-72) in the transmembrane helix II of mouse 5-hydroxytryptamine-6 receptor (5-HT6) is conserved among most G protein-coupled receptors. We have examined the functional significance of this residue by site-directed mutagenesis. A single Asp --> Ala (D72A) mutation resulted in an 8-fold decrease in apparent affinity for 5-HT, and a 60-fold reduction in EC50 value of agonist-induced stimulation of adenylyl cyclase. A F69L/T70I/D72A triple mutant showed a 2-fold reduction in apparent affinity for 5-HT but complete loss of adenylyl cyclase stimulation. Binding of SB-258585 (4-iodo-N-[4-methoxy-3-(4-methylpiperazin-1-yl)phenyl]benzene-sulfonamide), a selective 5-HT6 antagonist, was mildly affected (2- to 4-fold decrease in affinity) in the two mutants. Our data suggest that Asp-72 and additional residues toward the intracellular side of TM II have a limited role in ligand binding but are critical for functional activation of the 5-HT6 receptor.
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Affiliation(s)
- Jiaping Zhang
- Department of Metabolic Disorders, Merck Research Laboratories, Rahway, NJ 07065, USA
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46
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Lepailleur A, Bureau R, Paillet-Loilier M, Fabis F, Saettel N, Lemaître S, Dauphin F, Lesnard A, Lancelot JC, Rault S. Molecular modeling studies focused on 5-HT7 versus 5-HT1A selectivity. Discovery of novel phenylpyrrole derivatives with high affinity for 5-HT7 receptors. J Chem Inf Model 2006; 45:1075-81. [PMID: 16045303 DOI: 10.1021/ci050045p] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The present study discusses the well-known 5-HT7/5-HT1A selectivity issue through a new series of phenylpyrrole derivatives. The first hits emerged from a virtual screening performed on a chemolibrary. Further study led to an optimization of a preliminary 5-HT7 pharmacophore model. The importance of each pharmacophoric feature is confirmed, but these characteristics have to be coupled to geometric constraints in order to achieve a 5-HT7 selectivity. Indeed, 5-HT1A affinity probably arises from extended conformations, whereas a bent one appears to be best suited for 5-HT7 selectivity.
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Affiliation(s)
- Alban Lepailleur
- Centre d'Etudes et de Recherche sur le Médicament de Normandie, Université de Caen, U.F.R. des Sciences Pharmaceutiques, 5 rue Vaubénard, 14032 Caen Cedex, France
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47
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de la Fuente MC, Pullan SE, Biesmans I, Domínguez D. Synthesis and Receptor Binding Evaluation of Clavizepine Analogues with No Ring D Substituents. J Org Chem 2006; 71:3963-6. [PMID: 16674074 DOI: 10.1021/jo052320c] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Assembly of the azepine ring of xantheno[9,1-cd]azepines by electrophilic cyclization of sulfonamide acetals provides access to clavizepine analogues in the form of 2,12b-dihydro- or 4-hydroxy-2,3,4,12b-tetrahydro-1H-xantheno[9,1-cd]azepines, in the latter case producing the trans derivative stereoselectively. Binding assays for clavizepine and analogues at adrenergic, dopaminergic, and serotonergic receptors are reported.
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Affiliation(s)
- M Carmen de la Fuente
- Departamento de Química Organica y Unidad Asociada al CSIC, Facultad de Química, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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48
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Holenz J, Pauwels PJ, Díaz JL, Mercè R, Codony X, Buschmann H. Medicinal chemistry strategies to 5-HT6 receptor ligands as potential cognitive enhancers and antiobesity agents. Drug Discov Today 2006; 11:283-99. [PMID: 16580970 DOI: 10.1016/j.drudis.2006.02.004] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2005] [Revised: 12/15/2005] [Accepted: 02/20/2006] [Indexed: 10/24/2022]
Abstract
Although the 5-hydroxytryptamine(6) (5-HT(6)) receptor was discovered only recently, its almost exclusive distribution in the brain makes it a promising, novel, target for central nervous system (CNS)-mediated diseases such as Alzheimer's disease (cognitive function), schizophrenia, anxiety and obesity. In the past few years a significant research interest has advanced the understanding of the functional roles and the pharmacophore requirements of this receptor. Two 5-HT(6) receptor antagonists have already entered Phase II clinical trials for the enhancement of cognitive function. Since the first discovery of selective ligands for the 5-HT(6) receptor by HTS in 1998, several medicinal-chemistry-driven approaches have delivered highly selective lead structures with well-defined functionalities, starting from either the endogenous ligand 5-HT or the chemical structures identified by HTS. The concept of 'scaffold hopping' has been employed to expand the variability of the available chemical scaffolds and to generate patentable ligands. Supported by pharmacophore models, which have been established recently, the binding and functionality (structure-activity relationships) of the lead structures have been optimized further.
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Affiliation(s)
- Jörg Holenz
- Laboratorios Dr. Esteve S.A., Av. Mare de Déu de Montserrat 221, E-08041 Barcelona, Spain.
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49
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Zhang R, White NA, Soti FS, Kem WR, Machu TK. N-terminal domains in mouse and human 5-hydroxytryptamine3A receptors confer partial agonist and antagonist properties to benzylidene analogs of anabaseine. J Pharmacol Exp Ther 2006; 317:1276-84. [PMID: 16551836 DOI: 10.1124/jpet.106.101485] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The present study tested the hypothesis that mouse and human 5-hydroxytryptamine3A (5-HT3A) receptors may be differentially modulated by benzylidene analogs of anabaseine (BA) and that these analogs may be useful in assessing residues involved in receptor gating. Mouse and human wild-type and mouse and human chimeric 5-HT3A receptors expressed in Xenopus oocytes were evaluated with the two-electrode voltage clamp technique. Our previous studies demonstrated that 3-(2,4-dimethoxybenzylidene)-anabaseine (DMXBA) is an antagonist at the mouse wild-type 5-HT3A receptor, but that its metabolites 3-(2-hydroxy, 4-methoxybenzylidene)-anabaseine (2-OHMBA), 3-(2-methoxy, 4-hydroxybenzylidene)-anabaseine (4-OHMBA), and 3-(2,4-dihydroxybenzylidene)-anabaseine (2,4-DiOHBA) are partial agonists (J Pharmacol Exp Ther, 299: 1112-1117, 2001). In the human wild-type (HWT) 5-HT3A receptor, none of the BA compounds possessed partial agonist activity. BA compounds antagonized 1.5 microM 5-HT-mediated (EC50) responses in the HWT 5-HT3A receptor with a rank order of potency (IC50 in muM) of 2-OHMBA (1.5 +/- 0.1) > DMXBA (3.1 +/- 0.2) > 4-OHMBA (7.4 +/- 0.5) > 2,4-DiOHBA (12.8 +/- 0.7). In mouse receptor chimeras containing N-terminal human receptor orthologs, 2-OHMBA inhibited 5-HT-mediated (EC50) currents with IC50 values of 2.0 +/- 0.08 and 3.0 +/- 0.13 microM, respectively. In human receptor chimeras containing N-terminal mouse receptor orthologs, 2-OHMBA displayed partial agonist activities with EC50 values of 1.3 +/- 0.15 and 5.0 +/- 0.4 microM; efficacies were 43 and 57%, respectively. Thus, amino acids present in the distal one-third of the N terminus of mouse and human 5-HT3A receptors are necessary and sufficient to confer partial agonist or antagonist properties of 2-OHMBA.
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Affiliation(s)
- Ran Zhang
- Dept. of Pharmacology and Neuroscience, University of North Texas Health Science Center, 3500 Camp Bowie Blvd., Ft. Worth, TX 76107-2699, USA
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Adayev T, Ranasinghe B, Banerjee P. Transmembrane signaling in the brain by serotonin, a key regulator of physiology and emotion. Biosci Rep 2006; 25:363-85. [PMID: 16307382 DOI: 10.1007/s10540-005-2896-3] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2004] [Accepted: 07/14/2005] [Indexed: 11/30/2022] Open
Abstract
Serotonin (5-HT) is an ancient chemical that plays a crucial functional role in almost every living organism. It regulates platelet aggregation, activation of immune cells, and contraction of stomach and intestinal muscles. In addition, serotonin acts as a neurotransmitter in the brain and the peripheral nervous system. These activities are initiated by the binding of serotonin to 15 or more receptors that are pharmacologically classified into seven groups, 5-HT1 through 5-HT7. Each group is further divided into subgroups of receptors that are homologous but are encoded by discrete genes. With the exception of the 5-HT3 receptor--a cation channel--all of the others are G protein-coupled receptors that potentially activate or inhibit a large number of biochemical cascades. This review will endeavor to compare and contrast such signaling pathways with special attention to their tissue-specific occurrence, their possible role in immediate effects on covalent modification of other proteins, and relatively slower effects on gene expression, physiology and behavior.
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Affiliation(s)
- Tatyana Adayev
- Department of Chemistry and the CSI/IBR Center for Developmental Neuroscience, The College of Staten Island (CUNY), Staten Island, NY 10314, USA
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