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Sherin DR, Geethu CK, Prabhakaran J, Mann JJ, Dileep Kumar JS, Manojkumar TK. Molecular docking, dynamics simulations and 3D-QSAR modeling of arylpiperazine derivatives of 3,5-dioxo-(2H,4H)-1,2,4-triazine as 5-HT 1AR agonists. Comput Biol Chem 2018; 78:108-115. [PMID: 30502727 DOI: 10.1016/j.compbiolchem.2018.11.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 10/09/2018] [Accepted: 11/18/2018] [Indexed: 12/31/2022]
Abstract
Serotonin receptor, 5-HT1AR, agonists and partial agonists have established drug candidates for psychiatric and neurologic disorders. Recently, we reported the synthesis and evaluation of arylpiperazine derivatives of 3,5-dioxo-(2H,4H)-1,2,4-triazine as 5-HT1AR ligands. Herein, we generated a homology model of the receptor and docked the ligands against it, predicted the stability of the receptor model and complexes by molecular dynamics and generated a 3D-QSAR model for the arylpiperazine derivatives of 3,5-dioxo-(2H,4H)-1,2,4-triazine. The model suggests the hydrophobic part that arises from the aromatic region and the electron withdrawing parts play a vital role in the agonist activity of the lead molecules.
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Affiliation(s)
- D R Sherin
- Centre for Data Engineering and Computational Modeling, Indian Institute of Information Technology and Management-Kerala, India
| | - C K Geethu
- Centre for Data Engineering and Computational Modeling, Indian Institute of Information Technology and Management-Kerala, India
| | - Jaya Prabhakaran
- Molecular Imaging and Neuropathology Division, New York State Psychiatric Institute & Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York, USA
| | - J John Mann
- Molecular Imaging and Neuropathology Division, New York State Psychiatric Institute & Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York, USA
| | - J S Dileep Kumar
- Molecular Imaging and Neuropathology Division, New York State Psychiatric Institute & Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York, USA.
| | - T K Manojkumar
- Centre for Data Engineering and Computational Modeling, Indian Institute of Information Technology and Management-Kerala, India.
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Collier TL, Liang SH, Mann JJ, Vasdev N, Kumar JSD. Microfluidic radiosynthesis of [ 18F]FEMPT, a high affinity PET radiotracer for imaging serotonin receptors. Beilstein J Org Chem 2017; 13:2922-2927. [PMID: 29564020 PMCID: PMC5753126 DOI: 10.3762/bjoc.13.285] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 12/18/2017] [Indexed: 01/04/2023] Open
Abstract
Continuous-flow microfluidics has shown increased applications in radiochemistry over the last decade, particularly for both pre-clinical and clinical production of fluorine-18 labeled radiotracers. The main advantages of microfluidics are the reduction in reaction times and consumption of reagents that often result in increased radiochemical yields and rapid optimization of reaction parameters for 18F-labeling. In this paper, we report on the two-step microfluidic radiosynthesis of the high affinity partial agonist of the serotonin 1A receptor, [18F]FEMPT (pKi = 9. 79; Ki = 0.16 nM) by microfluidic radiochemistry. [18F]FEMPT was obtained in ≈7% isolated radiochemical yield and in >98% radiochemical and chemical purity. The molar activity of the final product was determined to be >148 GBq/µmol (>4 Ci/µmol).
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Affiliation(s)
- Thomas Lee Collier
- Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital & Harvard Medical School, Boston, MA, USA
- Advion, Inc., Ithaca, NY, USA
| | - Steven H Liang
- Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital & Harvard Medical School, Boston, MA, USA
| | - J John Mann
- Molecular Imaging and Neuropathology Division, New York State Psychiatric Institute, New York, NY, USA
| | | | - J S Dileep Kumar
- Molecular Imaging and Neuropathology Division, New York State Psychiatric Institute, New York, NY, USA
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Methods to Increase the Metabolic Stability of (18)F-Radiotracers. Molecules 2015; 20:16186-220. [PMID: 26404227 PMCID: PMC6332123 DOI: 10.3390/molecules200916186] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 08/20/2015] [Accepted: 08/26/2015] [Indexed: 11/17/2022] Open
Abstract
The majority of pharmaceuticals and other organic compounds incorporating radiotracers that are considered foreign to the body undergo metabolic changes in vivo. Metabolic degradation of these drugs is commonly caused by a system of enzymes of low substrate specificity requirement, which is present mainly in the liver, but drug metabolism may also take place in the kidneys or other organs. Thus, radiotracers and all other pharmaceuticals are faced with enormous challenges to maintain their stability in vivo highlighting the importance of their structure. Often in practice, such biologically active molecules exhibit these properties in vitro, but fail during in vivo studies due to obtaining an increased metabolism within minutes. Many pharmacologically and biologically interesting compounds never see application due to their lack of stability. One of the most important issues of radiotracers development based on fluorine-18 is the stability in vitro and in vivo. Sometimes, the metabolism of 18F-radiotracers goes along with the cleavage of the C-F bond and with the rejection of [18F]fluoride mostly combined with high background and accumulation in the skeleton. This review deals with the impact of radiodefluorination and with approaches to stabilize the C-F bond to avoid the cleavage between fluorine and carbon.
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Kumar JSD, Majo VJ, Prabhakaran J, Mann JJ. Synthesis and evaluation of arylpiperazines derivatives of 3,5-dioxo-(2H,4H)-1,2,4-triazine as 5-HT1AR ligands. Bioorg Med Chem Lett 2014; 24:4759-4762. [PMID: 25182564 DOI: 10.1016/j.bmcl.2014.07.048] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2014] [Revised: 07/16/2014] [Accepted: 07/17/2014] [Indexed: 12/23/2022]
Abstract
5-HT1AR agonist or partial agonists are established drug candidates for psychiatric and neurological disorders. We have reported the synthesis and evaluation of a series of high affinity 5-HT1AR partial agonist PET imaging agents with greater selectivity over α-1AR. The characteristic of these molecules are 3,5-dioxo-(2H,4H)-1,2,4-triazine skeleton tethered to an arylpiperazine unit through an alkyl side chain. The most potent 5-HT1AR agonistic properties were found to be associated with the molecules bearing C-4 alkyl group as the linker. Therefore development of 3,5-dioxo-(2H,4H)-1,2,4-triazine bearing arylpiperazine derivatives may provide high affinity selective 5-HT1AR ligands. Herein we describe the synthesis and evaluation of the binding properties of a series of arylpiperazine analogues of 3,5-dioxo-(2H,4H)-1,2,4-triazine.
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Affiliation(s)
- J S Dileep Kumar
- Division of Molecular Imaging and Neuropathology, New York State Psychiatric Institute, New York, USA; Department of Psychiatry and Behavior Science, Stony Brook University, New York, USA.
| | - Vattoly J Majo
- Division of Molecular Imaging and Neuropathology, New York State Psychiatric Institute, New York, USA
| | - Jaya Prabhakaran
- Columbia University College of Physicians and Surgeons, New York, USA
| | - J John Mann
- Division of Molecular Imaging and Neuropathology, New York State Psychiatric Institute, New York, USA; Columbia University College of Physicians and Surgeons, New York, USA
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Franck D, Kniess T, Steinbach J, Zitzmann-Kolbe S, Friebe M, Dinkelborg LM, Graham K. Investigations into the synthesis, radiofluorination and conjugation of a new [¹⁸F]fluorocyclobutyl prosthetic group and its in vitro stability using a tyrosine model system. Bioorg Med Chem 2012; 21:643-52. [PMID: 23290251 DOI: 10.1016/j.bmc.2012.11.049] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Revised: 11/12/2012] [Accepted: 11/29/2012] [Indexed: 11/29/2022]
Abstract
The [(18)F]fluorocyclobutyl group has the potential to be a metabolically stable prosthetic group for PET tracers. The synthesis of the radiolabeling precursor cis-cyclobutane-1,3-diyl bis(toluene-4-sulfonate) 8 was obtained from epibromohydrin in 7 steps (2% overall yield). The radiolabeling of this precursor 8 and its conjugation to L-tyrosine as a model system was successfully achieved to give the new non-natural amino acid 3-[(18)F]fluorocyclobutyl-L-tyrosine (L-3-[(18)F]FCBT) [(18)F]17 in 8% decay-corrected yield from the non-carrier-added [(18)F]fluoride. L-3-[(18)F]FCBT was investigated in vitro in different cancer cell lines to determine the uptake and stability. The tracer [(18)F]17 showed a time dependent uptake into different tumor cell lines (A549, NCI-H460, DU145) with the best uptake of 5.8% injected dose per 5×10(5) cells after 30min in human lung carcinoma cells A549. The stability of L-3-[(18)F]FCBT in human and rat plasma and the stability of the non-radioactive L-3-FCBT in rat hepatocytes were both found to be excellent. These results show that the non-natural amino acid L-3-[(18)F]FCBT is a promising metabolically stable radiotracer for positron emission tomography.
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Affiliation(s)
- Dominic Franck
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
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Pessoa-Mahana H, Recabarren-Gajardo G, Temer JF, Zapata-Torres G, Pessoa-Mahana CD, Barría CS, Araya-Maturana R. Synthesis, docking studies and biological evaluation of benzo[b]thiophen-2-yl-3-(4-arylpiperazin-1-yl)-propan-1-one derivatives on 5-HT1A serotonin receptors. Molecules 2012; 17:1388-407. [PMID: 22306829 PMCID: PMC6268179 DOI: 10.3390/molecules17021388] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Revised: 01/28/2012] [Accepted: 01/30/2012] [Indexed: 01/03/2023] Open
Abstract
A series of novel benzo[b]thiophen-2-yl-3-(4-arylpiperazin-1-yl)-propan-1-one derivatives 6a-f, 7a-f and their corresponding alcohols 8a-f were synthesized and evaluated for their affinity towards 5-HT(1A) receptors. The influence of arylpiperazine moiety and benzo[b]thiophene ring substitutions on binding affinity was studied. The most promising analogue, 1-(benzo[b]thiophen-2-yl)-3-(4-(pyridin-2-yl)piperazin-1-yl)propan-1-one (7e) displayed micromolar affinity (K(i) = 2.30 μM) toward 5-HT(1A) sites. Docking studies shed light on the relevant electrostatic interactions which could explain the observed affinity for this compound.
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Affiliation(s)
- Hernán Pessoa-Mahana
- Departamento de Química Orgánica y Fisicoquímica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago 1, Chile.
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Pellegatti L, Vedrenne E, Leger JM, Jarry C, Routier S. New heteroaromatic aminations on 5-aryl-1,2,4-triazines and 1,2,4,5-tetrazines by palladium catalysis. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.03.099] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Discovery and pharmacological characterization of aryl piperazine and piperidine ethers as dual acting norepinephrine reuptake inhibitors and 5-HT1A partial agonists. Bioorg Med Chem Lett 2009; 19:6604-7. [DOI: 10.1016/j.bmcl.2009.10.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2009] [Accepted: 10/05/2009] [Indexed: 11/22/2022]
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