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Socała K, Jakubiec M, Abram M, Mlost J, Starowicz K, Kamiński RM, Ciepiela K, Andres-Mach M, Zagaja M, Metcalf CS, Zawadzki P, Wlaź P, Kamiński K. TRPV1 channel in the pathophysiology of epilepsy and its potential as a molecular target for the development of new antiseizure drug candidates. Prog Neurobiol 2024:102634. [PMID: 38834133 DOI: 10.1016/j.pneurobio.2024.102634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 04/26/2024] [Accepted: 05/28/2024] [Indexed: 06/06/2024]
Abstract
Identification of transient receptor potential cation channel, subfamily V member 1 (TRPV1), also known as capsaicin receptor, in 1997 was a milestone achievement in the research on temperature sensation and pain signalling. Very soon after it become evident that TRPV1 is implicated in a wide array of physiological processes in different peripheral tissues, as well as in the central nervous system, and thereby could be involved in the pathophysiology of numerous diseases. Increasing evidence suggests that modulation of TRPV1 may also affect seizure susceptibility and epilepsy. This channel is localized in brain regions associated with seizures and epilepsy, and its overexpression was found both in animal models of seizures and in brain samples from epileptic patients. Moreover, modulation of TRPV1 on non-neuronal cells (microglia, astrocytes, and/or peripheral immune cells) may have an impact on the neuroinflammatory processes that play a role in epilepsy and epileptogenesis. In this paper, we provide a comprehensive and critical overview of currently available data on TRPV1 as a possible molecular target for epilepsy management, trying to identify research gaps and future directions. Overall, several converging lines of evidence implicate TRPV1 channel as a potentially attractive target in epilepsy research but more studies are needed to exploit the possible role of TRPV1 in seizures/epilepsy and to evaluate the value of TRPV1 ligands as candidates for new antiseizure drugs.
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Affiliation(s)
- Katarzyna Socała
- Department of Animal Physiology and Pharmacology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Akademicka 19, PL 20-033 Lublin, Poland.
| | - Marcin Jakubiec
- Department of Medicinal Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, PL 30-688 Cracow, Poland
| | - Michał Abram
- Department of Medicinal Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, PL 30-688 Cracow, Poland
| | - Jakub Mlost
- Department of Neurochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, PL 31-343 Cracow, Poland
| | - Katarzyna Starowicz
- Department of Neurochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, PL 31-343 Cracow, Poland
| | - Rafał M Kamiński
- Department of Medicinal Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, PL 30-688 Cracow, Poland
| | - Katarzyna Ciepiela
- Department of Medicinal Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, PL 30-688 Cracow, Poland; Selvita S.A., Bobrzyńskiego 14, PL 30-348 Cracow, Poland
| | - Marta Andres-Mach
- Department of Experimental Pharmacology, Institute of Rural Health, Jaczewskiego 2, PL 20-090 Lublin, Poland
| | - Mirosław Zagaja
- Department of Experimental Pharmacology, Institute of Rural Health, Jaczewskiego 2, PL 20-090 Lublin, Poland
| | - Cameron S Metcalf
- Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, UT 84112, USA
| | - Przemysław Zawadzki
- Department of Medicinal Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, PL 30-688 Cracow, Poland; Selvita S.A., Bobrzyńskiego 14, PL 30-348 Cracow, Poland
| | - Piotr Wlaź
- Department of Animal Physiology and Pharmacology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Akademicka 19, PL 20-033 Lublin, Poland
| | - Krzysztof Kamiński
- Department of Medicinal Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, PL 30-688 Cracow, Poland
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Rashid M, Khalid M, Ashraf A, Saleem T, Shafiq I, Shakil MA, Zainab B, El-Kott AF, Yaqub M, Shafiq Z. Multicomponent synthesis of pyrido[2,3- b]pyrazine derivatives: electrochemical DNA sensing, nonlinear optical properties and biological activity. RSC Adv 2023; 13:32160-32174. [PMID: 37920758 PMCID: PMC10619479 DOI: 10.1039/d3ra05365b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 10/19/2023] [Indexed: 11/04/2023] Open
Abstract
We synthesized novel pyrido[2,3-b]pyrazin based heterocyclic compounds (4-7) and their chemical structures were ascertained by spectral techniques (NMR, FT-IR). Besides experimental investigation, density functional theory (DFT) computations with B3LYP/6-31G(d,p) level of theory were executed to obtain spectroscopic and electronic properties. Nonlinear optical (NLO) properties, frontier molecular orbitals (FMOs), UV-visible, vibrational analysis, natural bond orbitals (NBOs), transition density matrix (TDM) and density of states (DOS) analyses of molecules (4-7) were accomplished at B3LYP/6-31G (d,p) level. Global reactivity parameters (GRPs) were correlated with the band gap (Egap) values; compound 7 with lower Egap (3.444 eV), exhibited smaller value of hardness (1.722 eV) with greater softness value (0.290 eV-1). The dipole moment (μ), average polarizability 〈α〉, first (βtot) and second 〈γ〉 hyper-polarizabilities were calculated for compounds (4-7). Compound 7 showed less Egap, highest absorption wavelength and remarkable NLO response. The highest 〈α〉, βtot and 〈γ〉 values for compound 7 were observed as 3.90 × 10-23, 15.6 × 10-30 and 6.63 × 10-35 esu, respectively. High NLO response revealed that pyrido[2,3-b]pyrazin based heterocyclic compounds had very remarkable contributions towards NLO technological applications. Further compounds (4-7) are utilized for the first time in electrochemical sensing of DNA, in vitro antioxidant and antiurease activity.
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Affiliation(s)
- Muhammad Rashid
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan 60800 Pakistan +92-3006559811
| | - Muhammad Khalid
- Institute of Chemistry, Khwaja Fareed University of Engineering & Information Technology Rahim Yar Khan 64200 Pakistan
- Centre for Theoretical and Computational Research, Khwaja Fareed University of Engineering & Information Technology Rahim Yar Khan 64200 Pakistan
| | - Abida Ashraf
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan 60800 Pakistan +92-3006559811
- Department of Chemistry, Govt. Graduate College Shah Rukne-Alam Multan Pakistan
| | - Tahira Saleem
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan 60800 Pakistan +92-3006559811
| | - Iqra Shafiq
- Institute of Chemistry, Khwaja Fareed University of Engineering & Information Technology Rahim Yar Khan 64200 Pakistan
- Centre for Theoretical and Computational Research, Khwaja Fareed University of Engineering & Information Technology Rahim Yar Khan 64200 Pakistan
| | - Muhammad Azeem Shakil
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan 60800 Pakistan +92-3006559811
| | - Briha Zainab
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan 60800 Pakistan +92-3006559811
| | - Attalla F El-Kott
- Department of Biology, College of Science, King Khalid University Abha Saudi Arabia
- Department of Zoology, College of Science, Damanhour University Egypt
| | - Muhammad Yaqub
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan 60800 Pakistan +92-3006559811
| | - Zahid Shafiq
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan 60800 Pakistan +92-3006559811
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Martins MS, Almeida IF, Cruz MT, Sousa E. Chronic pruritus: from pathophysiology to drug design. Biochem Pharmacol 2023; 212:115568. [PMID: 37116666 DOI: 10.1016/j.bcp.2023.115568] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 04/17/2023] [Accepted: 04/18/2023] [Indexed: 04/30/2023]
Abstract
Pruritus, the most common symptom in dermatology, is an innate response capable of protecting skin against irritants. Nonetheless, when it lasts more than six weeks it is assumed to be a chronic pathology having a negative impact on people's lives. Chronic pruritus (CP) can occur in common and rare skin diseases, having a high prevalence in global population. The existing therapies are unable to counteract CP or are associated with adverse effects, so the development of effective treatments is a pressing issue. The pathophysiological mechanisms underlying CP are not yet completely dissected but, based on current knowledge, involve a wide range of receptors, namely neurokinin 1 receptor (NK1R), Janus kinase (JAK), and transient receptor potential (TRP) ion channels, especially transient receptor potential vanilloid 1 (TRPV1) and transient receptor potential ankyrin 1 (TRPA1). This review will address the relevance of these molecular targets for the treatment of CP and molecules capable of modulating these receptors that have already been studied clinically or have the potential to possibly alleviate this pathology. According to scientific and clinical literature, there is an increase in the expression of these molecular targets in the lesioned skin of patients experiencing CP when compared with non-lesioned skin, highlighting their importance for the development of potential efficacious drugs through the design of antagonists/inhibitors.
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Affiliation(s)
- Márcia S Martins
- CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Novo Edifício do Terminal de Cruzeiros do Porto de Leixões, 4450-208 Matosinhos, Portugal; Laboratory of Organic and Pharmaceutical Chemistry, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Isaobel F Almeida
- Associate Laboratory i4HB-Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal; UCIBIO-Applied Molecular Biosciences Unit, MedTech, Laboratory of Pharmaceutical Technology, Department of Drug Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal.
| | - Maria T Cruz
- CNC-Center for Neuroscience and Cell Biology, CIBB-Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004-504 Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Emília Sousa
- CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Novo Edifício do Terminal de Cruzeiros do Porto de Leixões, 4450-208 Matosinhos, Portugal; Laboratory of Organic and Pharmaceutical Chemistry, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal.
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Oliveira-Tintino CDDM, Tintino SR, Justino de Araújo AC, dos Santos Barbosa CR, Ramos Freitas P, de Araújo Neto JB, Begnini IM, Rebelo RA, da Silva LE, Mireski SL, Nasato MC, Krautler MIL, Barreto HM, Ribeiro-Filho J, de Menezes IRA, Coutinho HDM. Efflux Pump (QacA, QacB, and QacC) and β-Lactamase Inhibitors? An Evaluation of 1,8-Naphthyridines against Staphylococcus aureus Strains. Molecules 2023; 28:molecules28041819. [PMID: 36838807 PMCID: PMC9961278 DOI: 10.3390/molecules28041819] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/09/2023] [Accepted: 02/10/2023] [Indexed: 02/17/2023] Open
Abstract
The bacterial species Staphylococcus aureus presents a variety of resistance mechanisms, among which the expression of β-lactamases and efflux pumps stand out for providing a significant degree of resistance to clinically relevant antibiotics. The 1,8-naphthyridines are nitrogen heterocycles with a broad spectrum of biological activities and, as such, are promising research targets. However, the potential roles of these compounds on bacterial resistance management remain to be better investigated. Therefore, the present study evaluated the antibacterial activity of 1,8-naphthyridine sulfonamides, addressing their ability to act as inhibitors of β-lactamases and efflux pump (QacA/B and QacC) against the strains SA-K4414 and SA-K4100 of S. aureus. All substances were prepared at an initial concentration of 1024 μg/mL, and their minimum inhibitory concentrations (MIC) were determined by the broth microdilution method. Subsequently, their effects on β-lactamase- and efflux pump-mediated antibiotic resistance was evaluated from the reduction of the MIC of ethidium bromide (EtBr) and β-lactam antibiotics, respectively. The 1,8-naphthyridines did not present direct antibacterial activity against the strains SA-K4414 and SA-K4100 of S. aureus. On the other hand, when associated with antibiotics against both strains, the compounds reduced the MIC of EtBr and β-lactam antibiotics, suggesting that they may act by inhibiting β-lactamases and efflux pumps such as QacC and QacA/B. However, further research is required to elucidate the molecular mechanisms underlying these observed effects.
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Affiliation(s)
| | - Saulo Relison Tintino
- Laboratory of Microbiology and Molecular Biology, Department of Biological Chemistry, Regional University of Cariri (URCA), Crato 63105-000, CE, Brazil
- Correspondence: (S.R.T.); (I.R.A.d.M.)
| | - Ana Carolina Justino de Araújo
- Laboratory of Microbiology and Molecular Biology, Department of Biological Chemistry, Regional University of Cariri (URCA), Crato 63105-000, CE, Brazil
| | - Cristina Rodrigues dos Santos Barbosa
- Laboratory of Microbiology and Molecular Biology, Department of Biological Chemistry, Regional University of Cariri (URCA), Crato 63105-000, CE, Brazil
| | - Priscilla Ramos Freitas
- Laboratory of Microbiology and Molecular Biology, Department of Biological Chemistry, Regional University of Cariri (URCA), Crato 63105-000, CE, Brazil
| | - José Bezerra de Araújo Neto
- Laboratory of Microbiology and Molecular Biology, Department of Biological Chemistry, Regional University of Cariri (URCA), Crato 63105-000, CE, Brazil
| | - Iêda Maria Begnini
- Department of Chemistry, Regional University of Blumenau (FURB), Itoupava Seca, Blumenau 89030-903, SC, Brazil
| | - Ricardo Andrade Rebelo
- Department of Chemistry, Regional University of Blumenau (FURB), Itoupava Seca, Blumenau 89030-903, SC, Brazil
| | - Luiz Everson da Silva
- Postgraduate Program in Sustainable Territorial Development, Coastal Sector, Federal University of Paraná (UFPR), Curitiba 81531-990, PR, Brazil
| | - Sandro Lucio Mireski
- Department of Chemistry, Regional University of Blumenau (FURB), Itoupava Seca, Blumenau 89030-903, SC, Brazil
| | - Michele Caroline Nasato
- Department of Chemistry, Regional University of Blumenau (FURB), Itoupava Seca, Blumenau 89030-903, SC, Brazil
| | | | | | - Jaime Ribeiro-Filho
- Oswaldo Cruz Foundation (Fiocruz), Fiocruz Ceará, Eusébio 60180-900, CE, Brazil
| | - Irwin Rose Alencar de Menezes
- Laboratory of Pharmacology and Molecular Chemistry (LFQM), Department of Biological Chemistry, Regional University of Cariri (URCA), Crato 63105-000, CE, Brazil
- Correspondence: (S.R.T.); (I.R.A.d.M.)
| | - Henrique Douglas Melo Coutinho
- Laboratory of Microbiology and Molecular Biology, Department of Biological Chemistry, Regional University of Cariri (URCA), Crato 63105-000, CE, Brazil
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Singh R, Adhya P, Sharma SS. Redox-sensitive TRP channels: a promising pharmacological target in chemotherapy-induced peripheral neuropathy. Expert Opin Ther Targets 2021; 25:529-545. [PMID: 34289785 DOI: 10.1080/14728222.2021.1956464] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Chemotherapy-induced peripheral neuropathy (CIPN) and its related pain is a major side effect of certain chemotherapeutic agents used in cancer treatment. Available analgesics are mostly symptomatic, and on prolonged treatment, patients become refractive to them. Hence, the development of improved therapeutics that act on novel therapeutic targets is necessary. Potential targets include the redox-sensitive TRP channels [e.g. TRPA1, TRPC5, TRPC6, TRPM2, TRPM8, TRPV1, TRPV2, and TRPV4] which are activated under oxidative stress associated with CIPN. AREAS COVERED We have examined numerous neuropathy-inducing cancer chemotherapeutics and their pathophysiological mechanisms. Oxidative stress and its downstream targets, the redox-sensitive TRP channels, together with their potential pharmacological modulators, are discussed. Finally, we reflect upon the barriers to getting new therapeutic approaches into the clinic. The literature search was conducted in PubMed upto and including April 2021. EXPERT OPINION Redox-sensitive TRP channels are a promising target in CIPN. Pharmacological modulators of these channels have reduced pain in preclinical models and in clinical studies. Clinical scrutiny suggests that TRPA1, TRPM8, and TRPV1 are the most promising targets because of their pain-relieving potential. In addition to the analgesic effect, TRPV1 agonist-Capsaicin possesses a disease-modifying effect in CIPN through its restorative property in damaged sensory nerves.
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Affiliation(s)
- Ramandeep Singh
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Mohali, Punjab, India
| | - Pratik Adhya
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Mohali, Punjab, India
| | - Shyam Sunder Sharma
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Mohali, Punjab, India
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Hu J, Gao M, Zhang Y, Wang Y, Qiao Z, Zhang W, Wang Q, Yan L, Qian H. Novel piperazine urea derivatives as highly potent transient receptor potential vanilloid 1 (TRPV1) antagonists. Bioorg Chem 2021; 115:105229. [PMID: 34364049 DOI: 10.1016/j.bioorg.2021.105229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 07/21/2021] [Accepted: 07/28/2021] [Indexed: 10/20/2022]
Abstract
Transient receptor potential vanilloid 1 (TRPV1) is a non-selective cation channel with high permeability to Ca2+, which can be activated by low pH, noxious heat and vanilloid compounds such as capsaicin. TRPV1 has been proved to be very important in the process of pain production and is considered to be a highly effective analgesic target. In this work, three series of new piperazine urea TRPV1 antagonists were designed, synthesized and evaluated based on classical TRPV1 antagonists BCTC and GRT12360. Among them, N-(4,6-dimethylpyridin-2-yl)-4-(2-(pyrrolidin-1-yl)benzyl)piperazine-1-carboxamide (5ac) was finally identified, which had excellent TRPV1 antagonistic activity (IC50 (CAP) = 9.80 nM), good bioavailability and did not cause side effects of hyperthermia. In the study of molecular docking, the compound 5ac fitted well with the amino acid residues on rTRPV1 through hydrophobic interaction. Collectively, compound 5ac is an efficient TRPV1 antagonist and can be used as a candidate for the development of analgesic drugs.
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Affiliation(s)
- Jing Hu
- Institute for Innovative Drug Design and Evaluation, School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan 475004, China
| | - Mengkang Gao
- Institute for Innovative Drug Design and Evaluation, School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan 475004, China
| | - Yang Zhang
- State Key Laboratory of Natural Medicines, Center of Drug Discovery, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, Jiangsu 210009, China
| | - Yusui Wang
- Institute for Innovative Drug Design and Evaluation, School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan 475004, China
| | - Zhenrui Qiao
- Institute for Innovative Drug Design and Evaluation, School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan 475004, China
| | - Weiya Zhang
- Institute for Innovative Drug Design and Evaluation, School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan 475004, China
| | - Qiang Wang
- School of Pharmaceutical Sciences, South-Central University for Nationalities, 182 Minyuan Road, Wuhan, Hubei 430074, China
| | - Lin Yan
- Institute for Innovative Drug Design and Evaluation, School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan 475004, China; Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou, Henan 450001, China.
| | - Hai Qian
- State Key Laboratory of Natural Medicines, Center of Drug Discovery, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, Jiangsu 210009, China.
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Achanta S, Jordt SE. Transient receptor potential channels in pulmonary chemical injuries and as countermeasure targets. Ann N Y Acad Sci 2020; 1480:73-103. [PMID: 32892378 PMCID: PMC7933981 DOI: 10.1111/nyas.14472] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 07/22/2020] [Accepted: 07/29/2020] [Indexed: 12/17/2022]
Abstract
The lung is highly sensitive to chemical injuries caused by exposure to threat agents in industrial or transportation accidents, occupational exposures, or deliberate use as weapons of mass destruction (WMD). There are no antidotes for the majority of the chemical threat agents and toxic inhalation hazards despite their use as WMDs for more than a century. Among several putative targets, evidence for transient receptor potential (TRP) ion channels as mediators of injury by various inhalational chemical threat agents is emerging. TRP channels are expressed in the respiratory system and are essential for homeostasis. Among TRP channels, the body of literature supporting essential roles for TRPA1, TRPV1, and TRPV4 in pulmonary chemical injuries is abundant. TRP channels mediate their function through sensory neuronal and nonneuronal pathways. TRP channels play a crucial role in complex pulmonary pathophysiologic events including, but not limited to, increased intracellular calcium levels, signal transduction, recruitment of proinflammatory cells, neurogenic inflammatory pathways, cough reflex, hampered mucus clearance, disruption of the integrity of the epithelia, pulmonary edema, and fibrosis. In this review, we summarize the role of TRP channels in chemical threat agents-induced pulmonary injuries and how these channels may serve as medical countermeasure targets for broader indications.
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Affiliation(s)
- Satyanarayana Achanta
- Department of Anesthesiology, Duke University School of Medicine, Durham, North Carolina
| | - Sven-Eric Jordt
- Department of Anesthesiology, Duke University School of Medicine, Durham, North Carolina
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, North Carolina
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut
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Niaz L, Saddique FA, Aslam S, Ahmad M, Mohsin NUA. Recent synthetic methodologies for pyridopyrazines: An update. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1786123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Liaba Niaz
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | | | - Sana Aslam
- Department of Chemistry, Government College Women University, Faisalabad, Pakistan
| | - Matloob Ahmad
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Noor ul Amin Mohsin
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad, Pakistan
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Nie C, Li Q, Qiao Y, Hu J, Gao M, Wang Y, Qiao Z, Wang Q, Yan L, Qian H. Study on chemical modification and analgesic activity of N-(4-tert-butylphenyl)-4-(3-chloropyridin-2-yl) piperazine-1-carboxamide. Eur J Med Chem 2020; 194:112236. [DOI: 10.1016/j.ejmech.2020.112236] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 03/11/2020] [Accepted: 03/11/2020] [Indexed: 01/14/2023]
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10
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Tykocki NR, Boerman EM, Jackson WF. Smooth Muscle Ion Channels and Regulation of Vascular Tone in Resistance Arteries and Arterioles. Compr Physiol 2017; 7:485-581. [PMID: 28333380 DOI: 10.1002/cphy.c160011] [Citation(s) in RCA: 212] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Vascular tone of resistance arteries and arterioles determines peripheral vascular resistance, contributing to the regulation of blood pressure and blood flow to, and within the body's tissues and organs. Ion channels in the plasma membrane and endoplasmic reticulum of vascular smooth muscle cells (SMCs) in these blood vessels importantly contribute to the regulation of intracellular Ca2+ concentration, the primary determinant of SMC contractile activity and vascular tone. Ion channels provide the main source of activator Ca2+ that determines vascular tone, and strongly contribute to setting and regulating membrane potential, which, in turn, regulates the open-state-probability of voltage gated Ca2+ channels (VGCCs), the primary source of Ca2+ in resistance artery and arteriolar SMCs. Ion channel function is also modulated by vasoconstrictors and vasodilators, contributing to all aspects of the regulation of vascular tone. This review will focus on the physiology of VGCCs, voltage-gated K+ (KV) channels, large-conductance Ca2+-activated K+ (BKCa) channels, strong-inward-rectifier K+ (KIR) channels, ATP-sensitive K+ (KATP) channels, ryanodine receptors (RyRs), inositol 1,4,5-trisphosphate receptors (IP3Rs), and a variety of transient receptor potential (TRP) channels that contribute to pressure-induced myogenic tone in resistance arteries and arterioles, the modulation of the function of these ion channels by vasoconstrictors and vasodilators, their role in the functional regulation of tissue blood flow and their dysfunction in diseases such as hypertension, obesity, and diabetes. © 2017 American Physiological Society. Compr Physiol 7:485-581, 2017.
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Affiliation(s)
- Nathan R Tykocki
- Department of Pharmacology, University of Vermont, Burlington, Vermont, USA
| | - Erika M Boerman
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri, USA
| | - William F Jackson
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, Michigan, USA
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Pennington LD, Moustakas DT. The Necessary Nitrogen Atom: A Versatile High-Impact Design Element for Multiparameter Optimization. J Med Chem 2017; 60:3552-3579. [PMID: 28177632 DOI: 10.1021/acs.jmedchem.6b01807] [Citation(s) in RCA: 179] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
There is a continued desire in biomedical research to reduce the number and duration of design cycles required to optimize lead compounds into high-quality chemical probes or safe and efficacious drug candidates. The insightful application of impactful molecular design elements is one approach toward achieving this goal. The replacement of a CH group with a N atom in aromatic and heteroaromatic ring systems can have many important effects on molecular and physicochemical properties and intra- and intermolecular interactions that can translate to improved pharmacological profiles. In this Perspective, the "necessary nitrogen atom" is shown to be a versatile high-impact design element for multiparameter optimization, wherein ≥10-, 100-, or 1000-fold improvement in a variety of key pharmacological parameters can be realized.
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Affiliation(s)
- Lewis D Pennington
- Medicinal Chemistry and ‡Modeling and Informatics, Alkermes, Plc , 852 Winter Street, Waltham, Massachusetts 02451-1420, United States
| | - Demetri T Moustakas
- Medicinal Chemistry and ‡Modeling and Informatics, Alkermes, Plc , 852 Winter Street, Waltham, Massachusetts 02451-1420, United States
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Alekseeva AY, Mikhailov DL, Bardasov IN, Timrukova DV, Ershov OV. Three-component synthesis of 5-aryl-1,8-naphthyridine-3-carbonitriles. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2016. [DOI: 10.1134/s1070428016100158] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Novel scaffolds for modulation of TRPV1 identified with pharmacophore modeling and virtual screening. Future Med Chem 2015; 7:243-56. [PMID: 25826358 PMCID: PMC6422283 DOI: 10.4155/fmc.14.168] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Aim The transient receptor potential vanilloid type 1 (TRPV1) is responsible for pain perception in the peripheral nervous system (PNS). TRPV1 is thus considered a versatile target for development of non-opioid analgesics. Results Pharmacophore-based clustering of a publicly available data set of TRPV1 antagonists revealed a set of models, which were validated with data sets of inactive compounds, decoys and known drug candidates. The top ranked pharmacophore models were subsequently used for virtual screening. Based on a unique in-house protocol, a set of compounds was selected and biologically tested for modulation of TRPV1 in a voltage-clamp model. Conclusion Pharmacophore models extracted from large public data sets are a valuable source for identification of novel scaffolds for TRPV1 receptor modulation.
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Madaan A, Verma R, Kumar V, Singh AT, Jain SK, Jaggi M. 1,8-Naphthyridine Derivatives: A Review of Multiple Biological Activities. Arch Pharm (Weinheim) 2015; 348:837-60. [DOI: 10.1002/ardp.201500237] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 10/10/2015] [Accepted: 10/14/2015] [Indexed: 12/16/2022]
Affiliation(s)
- Alka Madaan
- Cell Biology Lab; Dabur Research Foundation; Sahibabad, Ghaziabad Uttar Pradesh India
| | - Ritu Verma
- Cell Biology Lab; Dabur Research Foundation; Sahibabad, Ghaziabad Uttar Pradesh India
| | - Vivek Kumar
- Chemical Research Lab; Dabur Research Foundation; Sahibabad, Ghaziabad Uttar Pradesh India
| | - Anu T. Singh
- Cell Biology Lab; Dabur Research Foundation; Sahibabad, Ghaziabad Uttar Pradesh India
| | - Swatantra K. Jain
- Department of Medical Biochemistry, HIMSR and Department of Biotechnology; Jamia Hamdard; New Delhi India
| | - Manu Jaggi
- Cell Biology Lab; Dabur Research Foundation; Sahibabad, Ghaziabad Uttar Pradesh India
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Yan L, Wang J, Pan M, Qiu Q, Huang W, Qian H. Synthesis of Analogues of BCTC Incorporating a Pyrrolidinyl Linker and Biological Evaluation as Transient Receptor Potential Vanilloid 1 Antagonists. Chem Biol Drug Des 2015; 87:306-11. [DOI: 10.1111/cbdd.12661] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Revised: 08/12/2015] [Accepted: 09/06/2015] [Indexed: 11/28/2022]
Affiliation(s)
- Lin Yan
- Institute of Chemistry & Biology; Henan University; Kaifeng 475004 China
| | - Jingjie Wang
- State Key Laboratory of Natural Medicines; Center of Drug Discovery; China Pharmaceutical University; 24 Tongjiaxiang Nanjing 210009 China
| | - Miaobo Pan
- State Key Laboratory of Natural Medicines; Center of Drug Discovery; China Pharmaceutical University; 24 Tongjiaxiang Nanjing 210009 China
| | - Qianqian Qiu
- State Key Laboratory of Natural Medicines; Center of Drug Discovery; China Pharmaceutical University; 24 Tongjiaxiang Nanjing 210009 China
| | - Wenlong Huang
- State Key Laboratory of Natural Medicines; Center of Drug Discovery; China Pharmaceutical University; 24 Tongjiaxiang Nanjing 210009 China
| | - Hai Qian
- State Key Laboratory of Natural Medicines; Center of Drug Discovery; China Pharmaceutical University; 24 Tongjiaxiang Nanjing 210009 China
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Bardasov IN, Alekseeva AU, Ershov OV, Belikov MY. Four component DHARMA-synthesis of some densely functionalized 1,8-naphthyridines. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.08.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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17
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Lima CKF, Silva RM, Lacerda RB, Santos BLR, Silva RV, Amaral LS, Quintas LEM, Fraga CAM, Barreiro EJ, Guimaraes MZP, Miranda ALP. LASSBio-1135: a dual TRPV1 antagonist and anti-TNF-alpha compound orally effective in models of inflammatory and neuropathic pain. PLoS One 2014; 9:e99510. [PMID: 24941071 PMCID: PMC4062389 DOI: 10.1371/journal.pone.0099510] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Accepted: 05/15/2014] [Indexed: 01/09/2023] Open
Abstract
LASSBio-1135 is an imidazo[1,2-a]pyridine derivative with high efficacy in screening models of nociception and inflammation, presumed as a weak COX-2 inhibitor. In order to tease out its mechanism of action, we investigated others possible target for LASSBio-1135, such as TNF-α and TRPV1, to better characterize it as a multitarget compound useful in the treatment of chronic pain. TRPV1 modulation was assessed in TRPV1-expressing Xenopus oocytes against capsaicin and low pH-induced current. Modulation of TNF-α production was evaluated in culture of macrophages stimulated with LPS. In vivo efficacy of LASSBio-1135 was investigated in carrageenan and partial sciatic ligation-induced thermal hyperalgesia and mechanical allodynia. Corroborating its previous demonstration of efficacy in a model of capsaicin-induced hyperalgesia, LASSBio-1135 blocks capsaicin-elicited currents in a non-competitive way with an IC50 of 580 nM as well as low pH-induced current at 50 µM. As an additional action, LASSBio-1135 inhibited TNF-α release in these cells stimulated by LPS with an IC50 of 546 nM by reducing p38 MAPK phosphorilation. Oral administration of 100 µmol.Kg−1 LASSBio-1135 markedly reduced thermal hyperalgesia induced by carrageenan, however at 10 µmol.Kg−1 only a partial reduction was observed at the 4th h. Neutrophil recruitment and TNF-α production after carrageenan stimulus was also inhibited by the treatment with LASSBio-1135. Modulating TRPV1 and TNF-α production, two key therapeutic targets of neuropathic pain, 100 µmol.Kg−1 LASSBio-1135 was orally efficacious in reversing thermal hyperalgesia and mechanical allodynia produced by partial sciatic ligation 7–11 days after surgery without provoking hyperthermia, a common side effect of TRPV1 antagonists. In conclusion LASSBio-1135, besides being a weak COX-2 inhibitor, is a non-competitive TRPV1 antagonist and a TNF-α inhibitor. As a multitarget compound, LASSBio-1135 is orally efficacious in a model of neuropathic pain without presenting hyperthermia.
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Affiliation(s)
- Cleverton K. F. Lima
- Laboratório de Estudos em Farmacologia Experimental (LEFEx), Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Rafael M. Silva
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Renata B. Lacerda
- Laboratório de Avaliação e Síntese de Substâncias Bioativas (LASSBio), Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Bruna L. R. Santos
- Laboratório de Estudos em Farmacologia Experimental (LEFEx), Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Rafaela V. Silva
- Laboratório de Estudos em Farmacologia Experimental (LEFEx), Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Luciana S. Amaral
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Luís E. M. Quintas
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Carlos A. M. Fraga
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Laboratório de Avaliação e Síntese de Substâncias Bioativas (LASSBio), Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Eliezer J. Barreiro
- Laboratório de Avaliação e Síntese de Substâncias Bioativas (LASSBio), Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Marília Z. P. Guimaraes
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Ana L. P. Miranda
- Laboratório de Estudos em Farmacologia Experimental (LEFEx), Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- * E-mail:
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Zhang YC, Liu ZC, Yang R, Zhang JH, Yan SJ, Lin J. Regioselective construction of 1,3-diazaheterocycle fused [1,2-a][1,8]naphthyridine derivatives via cascade reaction of quinolines with heterocyclic ketene aminals: a joint experimental-computational approach. Org Biomol Chem 2014; 11:7276-88. [PMID: 24057033 DOI: 10.1039/c3ob41200h] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A one-step, transition-metal-free protocol, involving facile post-treatment, for the regioselective synthesis of 1,3-diazaheterocycle fused [1,2-a][1,8]naphthyridine derivatives (3) from 2-chloroquinoline-3-carbaldehydes (ClQuAlds) (1) and heterocyclic ketene aminals (HKAs) (2) was developed via a joint experimental-computational approach. The computational prediction of the reactivity of two series of synthons was applied in the process of optimizing the reaction conditions, which relied on density functional theory (DFT) calculations together with concepts of frontier molecular orbital (FMO) theory and quantitative structure-reactivity relationship (QSRR) presumptions. The combined results enabled the proposal of a pre-synthetic prediction of global reactivity. The fully consistent results of the synthetic experiments with the in silico evaluation confirmed the rationality, effectiveness, and practicability of the new strategy. Notably, the joint method is not limited to the laboratory, but has applications ranging from routine to industry. This approach is likely to yield numerous insights to accelerate HKA-related synthetic chemistry that can be extended to numerous heterocycles. It thus opens up a novel entry towards rapidly investigating the reactivity of novel synthons with unique properties, a further step towards exploiting cascade reactions by avoiding the futile waste of time and resources.
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Affiliation(s)
- Yi-Chuan Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
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Kékesi L, Sipos A, Németh G, Pató J, Breza N, Baska F, Őrfi L, Kéri G. Synthesis and biological evaluation of novel pyrido[2,3-b]pyrazines inhibiting both erlotinib-sensitive and erlotinib-resistant cell lines. Bioorg Med Chem Lett 2013; 23:6152-5. [DOI: 10.1016/j.bmcl.2013.09.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 09/01/2013] [Accepted: 09/03/2013] [Indexed: 02/06/2023]
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Tsareva DA, Ecker GF. How Far Could We Go with Open Data - A Case Study for TRPV1 Antagonists. Mol Inform 2013; 32:555-562. [PMID: 23956804 PMCID: PMC3743172 DOI: 10.1002/minf.201300019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2013] [Accepted: 05/14/2013] [Indexed: 12/30/2022]
Abstract
Publicly open databases of small compounds have become an indispensable tool for chemoinformaticians for collection and preparation of datasets suitable for drug discovery questions. Since these databases comprise compounds coming from structure-activity relationship (SAR) studies performed by different research groups, they are very diverse with respect to the biological assays used. In the present study we analyzed the applicability of a thoroughly curated dataset gathered from open sources for ligand-based studies, using the transient receptor potential vanilloid type 1 (TRPV1) as use case. Thorough curation of compounds according to the biological assay type and conditions led to a dataset of comparable bioactive chemicals. Subsequent exhaustive analysis of the obtained dataset using classification algorithms demonstrated that the models obtained in most of the cases possess reliable quality. Analysis of constantly misclassified compounds showed that they belong to local SAR series, where small changes in structure lead to different class labels. These small structural differences could not be captured by the classification algorithms. However application of the 3D alignment-independent QSAR technique GRIND for local, structurally related series overcomes this problem.
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Affiliation(s)
- Daria A Tsareva
- Department of Medicinal Chemistry, University of ViennaAlthanstr. 14, 1090 Vienna, Austria phone: +43-1-4277-55110
| | - Gerhard F Ecker
- Department of Medicinal Chemistry, University of ViennaAlthanstr. 14, 1090 Vienna, Austria phone: +43-1-4277-55110
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21
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Mukherjee S, Pal M. Quinolines: a new hope against inflammation. Drug Discov Today 2013; 18:389-98. [DOI: 10.1016/j.drudis.2012.11.003] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2012] [Revised: 10/12/2012] [Accepted: 11/07/2012] [Indexed: 01/05/2023]
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22
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Kim NJ, Li FN, Lee JH, Park SG, Kim K, Lim C, Han YT, Yun H, Jung JW, Park HG, Kim HD, Woo BY, Shin SS, Kim SY, Choi JK, Jeong YS, Park Y, Park YH, Kim DD, Choi S, Suh YG. Heterocycle-linked Phenylbenzyl Amides as Novel TRPV1 Antagonists and Their TRPV1 Binding Modes: Constraint-Induced Enhancement of In Vitro and In Vivo Activities. Chem Asian J 2012. [DOI: 10.1002/asia.201200730] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Nam-Jung Kim
- College of Pharmacy, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
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Marie E, Bouclé S, Enguehard-Gueiffier C, Gueiffier A. Regiocontrolled microwave assisted bifunctionalization of 7,8-dihalogenated imidazo[1,2-a]pyridines: a one pot double-coupling approach. Molecules 2012; 17:10683-707. [PMID: 22955457 PMCID: PMC6268566 DOI: 10.3390/molecules170910683] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Revised: 08/31/2012] [Accepted: 09/03/2012] [Indexed: 12/03/2022] Open
Abstract
The reactivity of the 7-chloro-8-iodo- and 8-chloro-7-iodoimidazo[1,2-a]pyridines 1a–e diversely substituted on the 2 position, towards Suzuki-Miyaura, Sonogashira, and Buchwald-Hartwig cross-coupling reactions as well as cyanation was evaluated. Various methodologies are proposed to introduce aryl, heteroaryl, alkyne, amine or cyano groups in the two positions depending on the nature of the substituent present in position 2. In both series, the substitution of the iodine atom was totally regioselective and the difficulty was to substitute the chlorine atom in a second step. Until now, only hetero(aryl) groups could be introduced though Suzuki-Miyaura cross-coupling. We overcame this problem evaluating both regioisomers in parallel. The double coupling approach was also studied allowing the one pot Suzuki/Suzuki, cyanation/Sonogashira and cyanation/Buchwald reactions leading to polyfunctionnalized imidazo[1,2-a]pyridines.
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Discovery and synthesis of 6,7,8,9-tetrahydro-5H-pyrimido-[4,5-d]azepines as novel TRPV1 antagonists. Bioorg Med Chem Lett 2010; 20:7137-41. [DOI: 10.1016/j.bmcl.2010.09.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Revised: 09/03/2010] [Accepted: 09/07/2010] [Indexed: 11/19/2022]
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Lebsack AD, Rech JC, Branstetter BJ, Hawryluk NA, Merit JE, Allison B, Rynberg R, Buma J, Rizzolio M, Swanson N, Ao H, Maher MP, Herrmann M, Freedman J, Scott BP, Luo L, Bhattacharya A, Wang Q, Chaplan SR, Wickenden AD, Breitenbucher JG. 1,2-Diamino-ethane-substituted-6,7,8,9-tetrahydro-5H-pyrimido[4,5-d]azepines as TRPV1 antagonists with improved properties. Bioorg Med Chem Lett 2010; 20:7142-6. [DOI: 10.1016/j.bmcl.2010.09.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2010] [Revised: 08/31/2010] [Accepted: 09/01/2010] [Indexed: 11/27/2022]
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Hodgetts KJ, Blum CA, Caldwell T, Bakthavatchalam R, Zheng X, Capitosti S, Krause JE, Cortright D, Crandall M, Murphy BA, Boyce S, Brian Jones A, Chenard BL. Pyrido[2,3-b]pyrazines, discovery of TRPV1 antagonists with reduced potential for the formation of reactive metabolites. Bioorg Med Chem Lett 2010; 20:4359-63. [DOI: 10.1016/j.bmcl.2010.06.069] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2010] [Revised: 06/10/2010] [Accepted: 06/11/2010] [Indexed: 12/21/2022]
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