1
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Rekowski SP, Kroener BK, Kathuria D, Wani AA, Chourasiya SS, Conrad J, Bharatam PV, Frey W, Beifuss U. A novel copper-catalyzed, hydrazine-free synthesis of N-1 unsubstituted 1H-indazoles using stable guanylhydrazone salts as substrates. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132192] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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2
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Gujarati NA, Undem BJ, Korlipara VL. Design, Synthesis, and Evaluation of Isoquinoline Ureas as TRPV1 Antagonists. Med Chem 2020; 16:202-211. [DOI: 10.2174/1573406415666190626130453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 05/06/2019] [Accepted: 06/09/2019] [Indexed: 11/22/2022]
Abstract
Background:
The inhibition of transient receptor potential vanilloid receptor 1
(TRPV1) has emerged as a novel approach for the treatment of various pain states. Pyrrolidinyl
urea, SB 705498 with pKb = 7.3 in guinea pig TRPV1 receptor has been investigated in Phase II
clinical trials for pain and chronic cough. Another heteroaryl urea derivative, A-425619 1, has
been reported to be a potent and selective TRPV1 antagonist of capsaicin-evoked receptor activation
with an IC50 value of 4 nM in hTRPV1.
Objective:
A series of thirteen A-425619 1 analogues with modifications centered around the Cregion
were synthesized to understand the binding site characteristics of TRPV1 receptors.
Method:
We synthesized a series of isoquinoline ureas and evaluated their antagonist potency using
smooth muscle assay using guinea pig trachea along with the evaluation of the molecular properties
and molecular modeling using CoMFA studies.
Results:
p-Chloro 4, p-bromo 5, m-isothiocyanate 15, and p-isothiocyanate 16 derivatives were
found to be the most potent members of the series with pKb values in the range of 7.3-7.4 in the
functional assay using guinea pig trachea. The lead compound A-425619 1 exhibited a pKb value
of 8.1 in this assay.
Conclusion:
The para-substituted analogues were found to be more potent than the ortho- and
meta- analogues in the biological assay. This observation was further supported by molecular
modeling studies using CoMFA.
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Affiliation(s)
- Nehaben A. Gujarati
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, United States
| | - Bradley J. Undem
- Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21224, United States
| | - Vijaya L. Korlipara
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, United States
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3
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Wang J, Li Y, Yang Y, Du J, Zhang S, Yang L. In silico research to assist the investigation of carboxamide derivatives as potent TRPV1 antagonists. MOLECULAR BIOSYSTEMS 2015; 11:2885-99. [DOI: 10.1039/c5mb00356c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The transient receptor potential vanilloid type 1 (TRPV1), a non-selective cation channel, is known for its essential role in the pathogenesis of various pain conditions such as nerve damage induced hyperalgesia, diabetic neuropathy and cancer pain.
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Affiliation(s)
- Jinghui Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- Faculty of Chemical
- Environmental and Biological Science and Technology
- Dalian University of Technology
- Dalian
| | - Yan Li
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- Faculty of Chemical
- Environmental and Biological Science and Technology
- Dalian University of Technology
- Dalian
| | - Yinfeng Yang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- Faculty of Chemical
- Environmental and Biological Science and Technology
- Dalian University of Technology
- Dalian
| | - Jian Du
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- Faculty of Chemical
- Environmental and Biological Science and Technology
- Dalian University of Technology
- Dalian
| | - Shuwei Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- Faculty of Chemical
- Environmental and Biological Science and Technology
- Dalian University of Technology
- Dalian
| | - Ling Yang
- Laboratory of Pharmaceutical Resource Discovery
- Dalian Institute of Chemical Physics
- Graduate School of the Chinese Academy of Sciences
- Dalian
- China
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Coapplication of lidocaine and membrane-impermeable lidocaine derivative QX-222 produces divergent effects on evoked and spontaneous nociceptive behaviors in mice. BIOMED RESEARCH INTERNATIONAL 2014; 2014:628729. [PMID: 25506595 PMCID: PMC4260428 DOI: 10.1155/2014/628729] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 09/08/2014] [Indexed: 12/29/2022]
Abstract
The present study was aimed at investigating the analgesic properties of a combination of lidocaine and QX-222 and its effects on evoked pain behavior (complete Freund's adjuvant-induced allodynia and hyperalgesia in inflammatory condition) and spontaneous pain behavior (formalin-induced acute pain) in mice. Drugs were injected adjacent to sciatic nerve or into plantar. Motor function, thermal withdrawal latency, mechanical withdrawal threshold, and licking/biting were evaluated by behavioral tests. A combination of lidocaine and QX-222 adjacent sciatic nerve injection produced the long-lasting sensory-specific nerve block, and intraplantar injection inhibited spontaneous pain in the formalin-treated mice but did not detectably attenuated hyperalgesia and allodynia in the complete Freund's adjuvant- (CFA-) treated mice. Our results suggest that a combination of lidocaine and QX-222 achieves a long-lasting differential block (sensory selective) and produces divergent effects on evoked and spontaneous pain behaviors in mice.
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Steinberg X, Lespay-Rebolledo C, Brauchi S. A structural view of ligand-dependent activation in thermoTRP channels. Front Physiol 2014; 5:171. [PMID: 24847275 PMCID: PMC4017155 DOI: 10.3389/fphys.2014.00171] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 04/11/2014] [Indexed: 11/26/2022] Open
Abstract
Transient Receptor Potential (TRP) proteins are a large family of ion channels, grouped into seven sub-families. Although great advances have been made regarding the activation and modulation of TRP channel activity, detailed molecular mechanisms governing TRP channel gating are still needed. Sensitive to electric, chemical, mechanical, and thermal cues, TRP channels are tightly associated with the detection and integration of sensory input, emerging as a model to study the polymodal activation of ion channel proteins. Among TRP channels, the temperature-activated kind constitute a subgroup by itself, formed by Vanilloid receptors 1–4, Melastatin receptors 2, 4, 5, and 8, TRPC5, and TRPA1. Some of the so-called “thermoTRP” channels participate in the detection of noxious stimuli making them an interesting pharmacological target for the treatment of pain. However, the poor specificity of the compounds available in the market represents an important obstacle to overcome. Understanding the molecular mechanics underlying ligand-dependent modulation of TRP channels may help with the rational design of novel synthetic analgesics. The present review focuses on the structural basis of ligand-dependent activation of TRPV1 and TRPM8 channels. Special attention is drawn to the dissection of ligand-binding sites within TRPV1, PIP2-dependent modulation of TRP channels, and the structure of natural and synthetic ligands.
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Affiliation(s)
- Ximena Steinberg
- Faculty of Medicine, Institute of Physiology, Universidad Austral de Chile Campus Isla Teja, Valdivia, Chile ; Faculty of Sciences, Graduate School, Universidad Austral de Chile Campus Isla Teja, Valdivia, Chile
| | - Carolyne Lespay-Rebolledo
- Faculty of Chemical and Pharmaceutical Sciences, Graduate School, Universidad de Chile Santiago, Chile
| | - Sebastian Brauchi
- Faculty of Medicine, Institute of Physiology, Universidad Austral de Chile Campus Isla Teja, Valdivia, Chile
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6
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Zhang H, Zhou F, Li C, Kong M, Liu H, Zhang P, Zhang S, Cao J, Zhang L, Ma H. Molecular mechanisms underlying the analgesic property of intrathecal dexmedetomidine and its neurotoxicity evaluation: an in vivo and in vitro experimental study. PLoS One 2013; 8:e55556. [PMID: 23409000 PMCID: PMC3567091 DOI: 10.1371/journal.pone.0055556] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2012] [Accepted: 12/27/2012] [Indexed: 12/13/2022] Open
Abstract
Background Dexmedetomidine (DEX) has been used under perioperative settings as an adjuvant to enhance the analgesic property of local anesthetics by some anesthesiologists. However, the analgesic mechanisms and neurotoxicity of DEX were poorly understood. This study examined the effect of DEX alone on inflammatory pain, and it also examined the underlying molecular mechanisms of DEX in the spinal cord. Furthermore, in vivo and in vitro experiments were performed to investigate the neurotoxicity of DEX on the spinal cord and cortical neurons. Methods This study used adult, male Kunming mice. In the acute inflammatory model, the left hind-paws of mice were intradermally injected with pH 5.0 PBS while chronic constrictive injury (CCI) of the sciatic nerve was used to duplicate the neuropathic pain condition. Thermal paw withdrawal latency and mechanical paw withdrawal threshold were tested with a radiant heat test and the Von Frey method, respectively. Locomotor activity and motor coordination were evaluated using the inverted mesh test. Western blotting examined spinal ERK1/2, p-ERK1/2, caspase-3 and β-actin expressions, while spinal c-Fos protein expression was realized with immunohistochemical staining. Hematoxylin eosin (HE) staining was used to examine the pathological impacts of intrathecal DEX on the spinal cord. DAPI (4′,6-diamidino-2-phenylindole) staining was used to observe cell death under an immunofluorescence microscope. Results Intra-plantar pH 5.0 PBS-induced acute pain required spinal ERK1/2 activation. Inhibition of spinal ERK1/2 signaling by intrathecal injection of DEX displayed a robust analgesia, via a α2-receptor dependent manner. The analgesic properties of DEX were validated in CCI mice. In vivo studies showed that intrathecal DEX has no significant pathological impacts on the spinal cord, and in vitro experiments indicated that DEX has potential protective effects of lidocaine-induced neural cell death. Conclusion Intrathecal injection of DEX alone or as an adjuvant might be potential for pain relief.
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Affiliation(s)
- Hongxing Zhang
- The First Clinical College, China Medical University, Shenyang, Liaoning, People’s Republic of China
- Department of Anesthesiology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, People’s Republic of China
| | - Fang Zhou
- The First Clinical College, China Medical University, Shenyang, Liaoning, People’s Republic of China
- Jiangsu Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, Jiangsu, People’s Republic of China
- School of Nursing, Xuzhou Medical College, Xuzhou, Jiangsu, People’s Republic of China
| | - Chen Li
- Jiangsu Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, Jiangsu, People’s Republic of China
| | - Min Kong
- Jiangsu Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, Jiangsu, People’s Republic of China
| | - He Liu
- The First Clinical College, China Medical University, Shenyang, Liaoning, People’s Republic of China
- Jiangsu Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, Jiangsu, People’s Republic of China
| | - Peng Zhang
- Jiangsu Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, Jiangsu, People’s Republic of China
| | - Song Zhang
- Jiangsu Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, Jiangsu, People’s Republic of China
| | - Junli Cao
- Jiangsu Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, Jiangsu, People’s Republic of China
- Department of Anesthesiology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu, People’s Republic of China
| | - Licai Zhang
- Jiangsu Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, Jiangsu, People’s Republic of China
| | - Hong Ma
- Department of Anesthesiology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, People’s Republic of China
- * E-mail:
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7
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Liu H, Zhang HX, Hou HY, Lu XF, Wei JQ, Wang CG, Zhang LC, Zeng YM, Wu YP, Cao JL. Acid solution is a suitable medium for introducing QX-314 into nociceptors through TRPV1 channels to produce sensory-specific analgesic effects. PLoS One 2011; 6:e29395. [PMID: 22216270 PMCID: PMC3247264 DOI: 10.1371/journal.pone.0029395] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2011] [Accepted: 11/28/2011] [Indexed: 11/25/2022] Open
Abstract
Background Previous studies have demonstrated that QX-314, an intracellular sodium channel blocker, can enter into nociceptors through capsaicin-activated TRPV1 or permeation of the membrane by chemical enhancers to produce a sensory-selective blockade. However, the obvious side effects of these combinations limit the application of QX-314. A new strategy for targeting delivery of QX-314 into nociceptors needs further investigation. The aim of this study is to test whether acidic QX-314, when dissolves in acidic solution directly, can enter into nociceptors through acid-activated TRPV1 and block sodium channels from the intracellular side to produce a sensory-specific analgesic effect. Methodology/Principal Findings Acidic solution or noradrenaline was injected intraplantarly to induce acute pain behavior in mice. A chronic constrictive injury model was performed to induce chronic neuropathic pain. A sciatic nerve blockade model was used to evaluate the sensory-specific analgesic effects of acidic QX-314. Thermal and mechanical hyperalgesia were measured by using radiant heat and electronic von Frey filaments test. Spinal Fos protein expression was determined by immunohistochemistry. The expression of p-ERK was detected by western blot assay. Whole cell clamp recording was performed to measure action potentials and total sodium current in rats DRG neurons. We found that pH 5.0 PBS solution induced behavioral hyperalgesia accompanied with the increased expression of spinal Fos protein and p-ERK. Pretreatment with pH 5.0 QX-314, and not pH 7.4 QX-314, alleviated pain behavior, inhibited the increased spinal Fos protein and p-ERK expression induced by pH 5.0 PBS or norepinephrine, blocked sodium currents and abolished the production of action potentials evoked by current injection. The above effects were prevented by TRPV1 channel inhibitor SB366791, but not by ASIC channel inhibitor amiloride. Furthermore, acidic QX-314 employed adjacent to the sciatic nerve selectively blocked the sensory but not the motor functions in naïve and CCI mice. Conclusions/Significance Acid solution is a suitable medium for introducing QX-314 into nociceptors through TRPV1 channels to produce a sensory-specific analgesic effect.
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Affiliation(s)
- He Liu
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, China
| | - Hong-Xing Zhang
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, China
| | - Hui-Yan Hou
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, China
| | - Xian-Fu Lu
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, China
| | - Jing-Qiu Wei
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, China
| | - Chun-Guang Wang
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, China
| | - Li-Cai Zhang
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, China
| | - Yin-Ming Zeng
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, China
- Department of Anesthesiology, Affiliated Hospital of Xuzhou Medical College, Xu Zhou, China
| | - Yong-Ping Wu
- Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application Technology, Xu Zhou, China
| | - Jun-Li Cao
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou, China
- Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application Technology, Xu Zhou, China
- Department of Anesthesiology, Affiliated Hospital of Xuzhou Medical College, Xu Zhou, China
- * E-mail:
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8
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9
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Thermoregulatory phenotype of the Trpv1 knockout mouse: thermoeffector dysbalance with hyperkinesis. J Neurosci 2011; 31:1721-33. [PMID: 21289181 DOI: 10.1523/jneurosci.4671-10.2011] [Citation(s) in RCA: 108] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This study aimed at determining the thermoregulatory phenotype of mice lacking transient receptor potential vanilloid-1 (TRPV1) channels. We used Trpv1 knockout (KO) mice and their genetically unaltered littermates to study diurnal variations in deep body temperature (T(b)) and thermoeffector activities under basal conditions, as well as thermoregulatory responses to severe heat and cold. Only subtle alterations were found in the basal T(b) of Trpv1 KO mice or in their T(b) responses to thermal challenges. The main thermoregulatory abnormality of Trpv1 KO mice was a different pattern of thermoeffectors used to regulate T(b). On the autonomic side, Trpv1 KO mice were hypometabolic (had a lower oxygen consumption) and hypervasoconstricted (had a lower tail skin temperature). In agreement with the enhanced skin vasoconstriction, Trpv1 KO mice had a higher thermoneutral zone. On the behavioral side, Trpv1 KO mice preferred a lower ambient temperature and expressed a higher locomotor activity. Experiments with pharmacological TRPV1 agonists (resiniferatoxin and anandamide) and a TRPV1 antagonist (AMG0347) confirmed that TRPV1 channels located outside the brain tonically inhibit locomotor activity. With age (observed for up to 14 months), the body mass of Trpv1 KO mice exceeded that of controls, sometimes approaching 60 g. In summary, Trpv1 KO mice possess a distinct thermoregulatory phenotype, which is coupled with a predisposition to age-associated overweight and includes hypometabolism, enhanced skin vasoconstriction, decreased thermopreferendum, and hyperkinesis. The latter may be one of the primary deficiencies in Trpv1 KO mice. We propose that TRPV1-mediated signals from the periphery tonically suppress the general locomotor activity.
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Perner RJ, Koenig JR, DiDomenico S, Gomtsyan A, Schmidt RG, Lee CH, Hsu MC, McDonald HA, Gauvin DM, Joshi S, Turner TM, Reilly RM, Kym PR, Kort ME. Synthesis and biological evaluation of 5-substituted and 4,5-disubstituted-2-arylamino oxazole TRPV1 antagonists. Bioorg Med Chem 2010; 18:4821-9. [DOI: 10.1016/j.bmc.2010.04.099] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2010] [Revised: 04/28/2010] [Accepted: 04/30/2010] [Indexed: 11/27/2022]
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Stokes BJ, Vogel CV, Urnezis LK, Pan M, Driver TG. Intramolecular Fe(II)-catalyzed N-O or N-N bond formation from aryl azides. Org Lett 2010; 12:2884-7. [PMID: 20507088 PMCID: PMC2913475 DOI: 10.1021/ol101040p] [Citation(s) in RCA: 149] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Iron(II) bromide catalyzes the transformation of aryl and vinyl azides with ketone or methyl oxime substituents into 2,1-benzisoxazoles, indazoles, or pyrazoles through the formation of an N-O or N-N bond. This transformation tolerates a variety of different functional groups to facilitate access to a range of benzisoxazoles or indazoles. The unreactivity of the Z-methyloxime indicates that N-heterocycle formation occurs through a nucleophilic attack of the ketone or oxime onto an activated planar iron azide complex.
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Affiliation(s)
- Benjamin J. Stokes
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois, 60607-7061
| | - Carl V. Vogel
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois, 60607-7061
| | - Linda K. Urnezis
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois, 60607-7061
| | - Minjie Pan
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois, 60607-7061
| | - Tom G. Driver
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois, 60607-7061
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12
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Discovery of TRPV1 antagonist ABT-116. Bioorg Med Chem Lett 2010; 20:3291-4. [DOI: 10.1016/j.bmcl.2010.04.047] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2010] [Revised: 04/07/2010] [Accepted: 04/12/2010] [Indexed: 11/23/2022]
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13
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Taskin T, Sevin F. QSAR Approach to Correlate TRPV1 Antagonist Activity for a Series of Heteroaromatic Urea. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/qsar.200810157] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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14
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Angeles García M, Claramunt RM, Solcan T, Milata V, Alkorta I, Elguero J. 13C and 15N NMR spectra of aminobenzimidazoles in solution and in the solid state. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2009; 47:100-104. [PMID: 19006105 DOI: 10.1002/mrc.2357] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The (13)C [hexadeutero-dimethylsulfoxide (DMSO-d(6)), hexamethyl-phosphoramide (HMPA)-d(18)and solid-state] and (15)N (solid-state) NMR spectra of six C-aminobenzimidazoles have been recorded. The tautomerism of 4(7)-aminobenzimidazoles and 5(6)-aminobenzimidazoles has been determined and compared with B3LYP/6-311 + + G(d,p) calculations confirming the clear predominance of the 4-amino tautomer and the slight preference for the 6-amino tautomer. GIAO-calculated absolute shieldings compare well with experimental chemical shifts.
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Affiliation(s)
- M Angeles García
- Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Senda del Rey 9, E-28040 Madrid, Spain.
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Xiao D, Palani A, Aslanian R, McKittrick BA, McPhail AT, Correll CC, Phelps PT, Anthes JC, Rindgen D. Spiro-piperidine azetidinones as potent TRPV1 antagonists. Bioorg Med Chem Lett 2008; 19:783-7. [PMID: 19114307 DOI: 10.1016/j.bmcl.2008.12.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2008] [Revised: 12/03/2008] [Accepted: 12/04/2008] [Indexed: 11/19/2022]
Abstract
A series of spiro-piperidine azetidinone were synthesized and evaluated as potential TRPV1 antagonists. An important issue of plasma stability was investigated and resolved. Further focused SAR study lead to the discovery of a potent antagonist with good oral pharmacokinetic profile in rat.
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Affiliation(s)
- Dong Xiao
- Chemical Research Department, Schering-Plough Research Institute, 2015 Galloping Hill Road, Kenilworth, NJ 07033, USA.
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16
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Urankar D, Kosmrlj J. Concise and diversity-oriented synthesis of ligand arm-functionalized azoamides. ACTA ACUST UNITED AC 2008; 10:981-5. [PMID: 18922038 DOI: 10.1021/cc8001475] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Azoamides, previously established as bioactive intracellular GSH-depleting agents, were decorated with a terminal alkyne moiety to 4 and then were transformed, by copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC), into different ligand-arm functionalized azoamides 6. Azides 5 having ligand-arms amenable for binding to platinum(II) were selected for this study. Because, for the fragile azoamides 4, the typically employed reaction conditions for CuAAC failed, several alternative solvents and copper catalysts were tested. Excellent results were obtained with copper(II) sulfate pentahydrate/metallic copper and especially with heterogeneous catalysts, such as copper-in-charcoal, cupric oxide, and cuprous oxide. The heterogeneous catalysts were employed to obtain the desired products in almost quantitative yields by a simple three-step "stir-filter-evaporate" protocol with no or negligible contamination with copper impurities. This is of particular importance because compounds 6 have been designed for coordination.
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Affiliation(s)
- Damijana Urankar
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, SI-1000 Ljubljana, Slovenia
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Mills C, McMackin M, Jaffe R, Yu J, Zininberg E, Slee D, Gogas K, Bradbury M. Effects of the transient receptor potential vanilloid 1 antagonist A-425619 on body temperature and thermoregulation in the rat. Neuroscience 2008; 156:165-74. [DOI: 10.1016/j.neuroscience.2008.06.069] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2008] [Revised: 06/10/2008] [Accepted: 06/25/2008] [Indexed: 11/28/2022]
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18
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Childers WE, Gilbert AM, Kennedy JD, Whiteside GT. Advances in the development of novel analgesics. Expert Opin Ther Pat 2008. [DOI: 10.1517/13543776.18.9.1027] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Mandadi S, Roufogalis BD. ThermoTRP channels in nociceptors: taking a lead from capsaicin receptor TRPV1. Curr Neuropharmacol 2008; 6:21-38. [PMID: 19305786 PMCID: PMC2645548 DOI: 10.2174/157015908783769680] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2007] [Revised: 04/27/2007] [Accepted: 07/15/2007] [Indexed: 01/08/2023] Open
Abstract
Nociceptors with peripheral and central projections express temperature sensitive transient receptor potential (TRP) ion channels, also called thermoTRP's. Chemosensitivity of thermoTRP's to certain natural compounds eliciting pain or exhibiting thermal properties has proven to be a good tool in characterizing these receptors. Capsaicin, a pungent chemical in hot peppers, has assisted in the cloning of the first thermoTRP, TRPV1. This discovery initiated the search for other receptors encoding the response to a wide range of temperatures encountered by the body. Of these, TRPV1 and TRPV2 encode unique modalities of thermal pain when exposed to noxious heat. The ability of TRPA1 to encode noxious cold is presently being debated. The role of TRPV1 in peripheral inflammatory pain and central sensitization during chronic pain is well known. In addition to endogenous agonists, a wide variety of chemical agonists and antagonists have been discovered to activate and inhibit TRPV1. Efforts are underway to determine conditions under which agonist-mediated desensitization of TRPV1 or inhibition by antagonists can produce analgesia. Also, identification of specific second messenger molecules that regulate phosphorylation of TRPV1 has been the focus of intense research, to exploit a broader approach to pain treatment. The search for a role of TRPV2 in pain remains dormant due to the lack of suitable experimental models. However, progress into TRPA1's role in pain has received much attention recently. Another thermoTRP, TRPM8, encoding for the cool sensation and also expressed in nociceptors, has recently been shown to reduce pain via a central mechanism, thus opening a novel strategy for achieving analgesia. The role of other thermoTRP's (TRPV3 and TRPV4) encoding for detection of warm temperatures and expressed in nociceptors cannot be excluded. This review will discuss current knowledge on the role of nociceptor thermoTRPs in pain and therapy and describes the activator and inhibitor molecules known to interact with them and modulate their activity.
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Affiliation(s)
- Sravan Mandadi
- Hotchkiss Brain Institute, 3330 Hospital Drive NW, Calgary, Alberta T2N 4N1, Canada
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Christoph T, Bahrenberg G, De Vry J, Englberger W, Erdmann VA, Frech M, Kögel B, Röhl T, Schiene K, Schröder W, Seibler J, Kurreck J. Investigation of TRPV1 loss-of-function phenotypes in transgenic shRNA expressing and knockout mice. Mol Cell Neurosci 2008; 37:579-89. [DOI: 10.1016/j.mcn.2007.12.006] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2007] [Revised: 11/28/2007] [Accepted: 12/06/2007] [Indexed: 01/19/2023] Open
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Gomtsyan A, Bayburt EK, Schmidt RG, Surowy CS, Honore P, Marsh KC, Hannick SM, McDonald HA, Wetter JM, Sullivan JP, Jarvis MF, Faltynek CR, Lee CH. Identification of (R)-1-(5-tert-Butyl-2,3-dihydro-1H-inden-1-yl)-3-(1H-indazol-4-yl)urea (ABT-102) as a Potent TRPV1 Antagonist for Pain Management. J Med Chem 2008; 51:392-5. [DOI: 10.1021/jm701007g] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Arthur Gomtsyan
- Global Pharmaceutical Research and Development, Neuroscience Research, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064
| | - Erol K. Bayburt
- Global Pharmaceutical Research and Development, Neuroscience Research, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064
| | - Robert G. Schmidt
- Global Pharmaceutical Research and Development, Neuroscience Research, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064
| | - Carol S. Surowy
- Global Pharmaceutical Research and Development, Neuroscience Research, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064
| | - Prisca Honore
- Global Pharmaceutical Research and Development, Neuroscience Research, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064
| | - Kennan C. Marsh
- Global Pharmaceutical Research and Development, Neuroscience Research, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064
| | - Steven M. Hannick
- Global Pharmaceutical Research and Development, Neuroscience Research, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064
| | - Heath A. McDonald
- Global Pharmaceutical Research and Development, Neuroscience Research, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064
| | - Jill M. Wetter
- Global Pharmaceutical Research and Development, Neuroscience Research, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064
| | - James P. Sullivan
- Global Pharmaceutical Research and Development, Neuroscience Research, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064
| | - Michael F. Jarvis
- Global Pharmaceutical Research and Development, Neuroscience Research, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064
| | - Connie R. Faltynek
- Global Pharmaceutical Research and Development, Neuroscience Research, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064
| | - Chih-Hung Lee
- Global Pharmaceutical Research and Development, Neuroscience Research, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064
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Gomtsyan A, Bayburt EK, Keddy R, Turner SC, Jinkerson TK, Didomenico S, Perner RJ, Koenig JR, Drizin I, McDonald HA, Surowy CS, Honore P, Mikusa J, Marsh KC, Wetter JM, Faltynek CR, Lee CH. α-Methylation at benzylic fragment of N-aryl-N′-benzyl ureas provides TRPV1 antagonists with better pharmacokinetic properties and higher efficacy in inflammatory pain model. Bioorg Med Chem Lett 2007; 17:3894-9. [PMID: 17507218 DOI: 10.1016/j.bmcl.2007.04.105] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2007] [Revised: 04/24/2007] [Accepted: 04/30/2007] [Indexed: 10/23/2022]
Abstract
SAR studies for N-aryl-N'-benzyl urea class of TRPV1 antagonists have been extended to cover alpha-benzyl alkylation. Alkylated compounds showed weaker in vitro potencies in blocking capsaicin activation of TRPV1 receptor, but possessed improved pharmacokinetic properties. Further structural manipulations that included replacement of isoquinoline core with indazole and isolation of single enantiomer led to TRPV1 antagonists like (R)-16a with superior pharmacokinetic properties and greater potency in animal model of inflammatory pain.
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Affiliation(s)
- Arthur Gomtsyan
- Global Pharmaceutical Research and Development, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, IL 60064, USA.
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23
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Perner RJ, DiDomenico S, Koenig JR, Gomtsyan A, Bayburt EK, Schmidt RG, Drizin I, Zheng GZ, Turner SC, Jinkerson T, Brown BS, Keddy RG, Lukin K, McDonald HA, Honore P, Mikusa J, Marsh KC, Wetter JM, George KS, Jarvis MF, Faltynek CR, Lee CH. In Vitro Structure−Activity Relationship and In Vivo Characterization of 1-(Aryl)-3-(4-(amino)benzyl)urea Transient Receptor Potential Vanilloid 1 Antagonists. J Med Chem 2007; 50:3651-60. [PMID: 17583335 DOI: 10.1021/jm070276i] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis and structure-activity relationship of 1-(aryl)-3-(4-(amino)benzyl)urea transient receptor potential vanilloid 1 (TRPV1) antagonists are described. A variety of cyclic amine substituents are well tolerated at the 4-position of the benzyl group on compounds containing either an isoquinoline or indazole heterocyclic core. These compounds are potent antagonists of capsaicin activation of the TRPV1 receptor in vitro. Analogues, such as compound 45, have been identified that have good in vivo activity in animal models of pain. Further optimization of 45 resulted in compound 58 with substantially improved microsome stability and oral bioavailability, as well as in vivo activity.
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Affiliation(s)
- Richard J Perner
- Neuroscience Research, Global Pharmaceutical Research and Development, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064, USA.
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Lukin K, Hsu MC, Chambournier G, Kotecki B, Venkatramani CJ, Leanna MR. Development of a Large Scale Asymmetric Synthesis of Vanilloid Receptor (TRPV1) Antagonist ABT-102. Org Process Res Dev 2007. [DOI: 10.1021/op060228s] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kirill Lukin
- GPRD Process Chemistry, Abbott Laboratories, R-13, North Chicago, Illinois 60064-6291, U.S.A
| | - Margaret C. Hsu
- GPRD Process Chemistry, Abbott Laboratories, R-13, North Chicago, Illinois 60064-6291, U.S.A
| | - Gilles Chambournier
- GPRD Process Chemistry, Abbott Laboratories, R-13, North Chicago, Illinois 60064-6291, U.S.A
| | - Brian Kotecki
- GPRD Process Chemistry, Abbott Laboratories, R-13, North Chicago, Illinois 60064-6291, U.S.A
| | - C. J. Venkatramani
- GPRD Process Chemistry, Abbott Laboratories, R-13, North Chicago, Illinois 60064-6291, U.S.A
| | - M. Robert Leanna
- GPRD Process Chemistry, Abbott Laboratories, R-13, North Chicago, Illinois 60064-6291, U.S.A
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Liu G, Zhao H, Liu B, Xin Z, Liu M, Serby MD, Lubbers NL, Widomski DL, Polakowski JS, Beno DWA, Trevillyan JM, Sham HL. Hemodynamic effects of potent and selective JNK inhibitors in anesthetized rats: Implication for targeting protein kinases in metabolic diseases. Bioorg Med Chem Lett 2007; 17:495-500. [PMID: 17055723 DOI: 10.1016/j.bmcl.2006.10.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2006] [Revised: 10/05/2006] [Accepted: 10/05/2006] [Indexed: 10/24/2022]
Abstract
The hemodynamic effects of a series of potent and selective 4-aminopyridine carboxamide-based pan-JNK inhibitors were assessed in an anesthetized rat model. The effects of these agents on mean arterial pressure, heart rate, cardiac contractility, and peripheral vascular resistance are described, and the implication for targeting protein kinases in metabolic diseases is discussed.
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Affiliation(s)
- Gang Liu
- Metabolic Disease Research, Global Pharmaceutical Research and Development, Abbott Laboratories, Abbott Park, IL 60064-6101, USA.
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