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Andrei C, Zanfirescu A, Nițulescu GM, Olaru OT, Negreș S. Natural Active Ingredients and TRPV1 Modulation: Focus on Key Chemical Moieties Involved in Ligand-Target Interaction. PLANTS (BASEL, SWITZERLAND) 2023; 12:339. [PMID: 36679051 PMCID: PMC9860573 DOI: 10.3390/plants12020339] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/06/2023] [Accepted: 01/08/2023] [Indexed: 06/17/2023]
Abstract
Diseases such as cancer, neurological pathologies and chronic pain represent currently unmet needs. The existing pharmacotherapeutic options available for treating these conditions are limited by lack of efficiency and/or side effects. Transient receptor potential vanilloid 1 ion channel emerged as an attractive therapeutic target for developing new analgesic, anti-cancer and antiepileptic agents. Furthermore, various natural ingredients were shown to have affinity for this receptor. The aim of this narrative review was to summarize the diverse natural scaffolds of TRPV1 modulators based on their agonistic/antagonistic properties and to analyze the structure-activity relationships between the ligands and molecular targets based on the results of the existing molecular docking, mutagenesis and in vitro studies. We present here an exhaustive collection of TRPV1 modulators grouped by relevant chemical features: vanilloids, guaiacols, phenols, alkylbenzenes, monoterpenes, sesquiterpenoids, alkaloids, etc. The information herein is useful for understanding the key structural elements mediating the interaction with TRPV1 and how their structural variation impacts the interaction between the ligand and receptor. We hope this data will contribute to the design of novel effective and safe TRPV1 modulators, to help overcome the lack of effective therapeutic agents against pathologies with high morbidity and mortality.
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Anticancer Activity of Natural and Semi-Synthetic Drimane and Coloratane Sesquiterpenoids. Molecules 2022; 27:molecules27082501. [PMID: 35458699 PMCID: PMC9031474 DOI: 10.3390/molecules27082501] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/09/2022] [Accepted: 04/11/2022] [Indexed: 12/12/2022] Open
Abstract
Drimane and coloratane sesquiterpenoids are present in several plants, microorganisms, and marine life. Because of their cytotoxic activity, these sesquiterpenoids have received increasing attention as a source for new anticancer drugs and pharmacophores. Natural drimanes and coloratanes, as well as their semi-synthetic derivatives, showed promising results against cancer cell lines with in vitro activities in the low micro- and nanomolar range. Despite their high potential as novel anticancer agents, the mode of action and structure–activity relationships of drimanes and coloratanes have not been completely enlightened nor systematically reviewed. Our review aims to give an overview of known structures and derivatizations of this class of sesquiterpenoids, as well as their activity against cancer cells and potential modes-of-action. The cytotoxic activities of about 40 natural and 25 semi-synthetic drimanes and coloratanes are discussed. In addition to that, we give a summary about the clinical significance of drimane and coloratane sesquiterpenoids.
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Paz C, Ortiz L, Deuis JR, Vetter I. Polygodial, a drimane sesquiterpenoid dialdehyde purified from Drimys winteri, inhibits voltage-gated sodium channels. Nat Prod Res 2022; 36:6318-6323. [PMID: 35021940 DOI: 10.1080/14786419.2022.2025592] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Drimys winteri J.R.Forst. & G.Forst, a South American evergreen shrub that is used by the Mapuche people for treatment of several painful conditions, contains polygodial, a lipophilic drimane-type sesquiterpene dialdehyde with known activity at transient receptor potential channel family members including TRPA1 and TRPV1. We sought to assess the activity of polygodial at NaV1.7 and NaV1.8, two key isoforms of the voltage-gated sodium channel family involved in nociception. Polygodial was isolated from D. winteri by thin-layer chromatography and analysed structurally by 1 D and 2 D nuclear magnetic resonance (NMR) spectroscopy. Activity at heterologously expressed NaV1.7 and NaV1.8 was assessed using automated whole-cell patch-clamp electrophysiology. Here, we show that polygodial inhibits members of the voltage-gated sodium channel family, specifically NaV1.7 and NaV1.8, without changing the voltage-dependence of activation or inactivation. Activity of polygodial at voltage-gated sodium channels may contribute to the previously reported antinociceptive properties.
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Affiliation(s)
- Cristian Paz
- Laboratory of Natural Products & Drug Discovery, Center CEBIM, Universidad de La Frontera, Temuco, Chile
| | - Leandro Ortiz
- Instituto de Ciencias Químicas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - Jennifer R Deuis
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland, Australia
| | - Irina Vetter
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland, Australia.,School of Pharmacy, The University of Queensland, Woolloongabba, Queensland, Australia
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Duitama M, Moreno Y, Santander SP, Casas Z, Sutachan JJ, Torres YP, Albarracín SL. TRP Channels as Molecular Targets to Relieve Cancer Pain. Biomolecules 2021; 12:1. [PMID: 35053150 PMCID: PMC8774023 DOI: 10.3390/biom12010001] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 11/17/2021] [Accepted: 11/23/2021] [Indexed: 12/13/2022] Open
Abstract
Transient receptor potential (TRP) channels are critical receptors in the transduction of nociceptive stimuli. The microenvironment of diverse types of cancer releases substances, including growth factors, neurotransmitters, and inflammatory mediators, which modulate the activity of TRPs through the regulation of intracellular signaling pathways. The modulation of TRP channels is associated with the peripheral sensitization observed in patients with cancer, which results in mild noxious sensory stimuli being perceived as hyperalgesia and allodynia. Secondary metabolites derived from plant extracts can induce the activation, blocking, and desensitization of TRP channels. Thus, these compounds could act as potential therapeutic agents, as their antinociceptive properties could be beneficial in relieving cancer-derived pain. In this review, we will summarize the role of TRPV1 and TRPA1 in pain associated with cancer and discuss molecules that have been reported to modulate these channels, focusing particularly on the mechanisms of channel activation associated with molecules released in the tumor microenvironment.
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Affiliation(s)
- Milena Duitama
- Departamento de Nutrición y Bioquímica, Pontificia Universidad Javeriana, Bogotá 110231, Colombia; (M.D.); (Z.C.); (J.J.S.)
| | - Yurany Moreno
- Department of Lymphoma & Myeloma, MD Anderson Cancer Center, The University of Texas, Houston, TX 77030, USA;
| | - Sandra Paola Santander
- Phytoimmunomodulation Research Group, Juan N. Corpas University Foundation, Bogotá 111111, Colombia;
| | - Zulma Casas
- Departamento de Nutrición y Bioquímica, Pontificia Universidad Javeriana, Bogotá 110231, Colombia; (M.D.); (Z.C.); (J.J.S.)
| | - Jhon Jairo Sutachan
- Departamento de Nutrición y Bioquímica, Pontificia Universidad Javeriana, Bogotá 110231, Colombia; (M.D.); (Z.C.); (J.J.S.)
| | - Yolima P. Torres
- Departamento de Nutrición y Bioquímica, Pontificia Universidad Javeriana, Bogotá 110231, Colombia; (M.D.); (Z.C.); (J.J.S.)
| | - Sonia L. Albarracín
- Departamento de Nutrición y Bioquímica, Pontificia Universidad Javeriana, Bogotá 110231, Colombia; (M.D.); (Z.C.); (J.J.S.)
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Li L, Chen C, Chiang C, Xiao T, Chen Y, Zhao Y, Zheng D. The Impact of TRPV1 on Cancer Pathogenesis and Therapy: A Systematic Review. Int J Biol Sci 2021; 17:2034-2049. [PMID: 34131404 PMCID: PMC8193258 DOI: 10.7150/ijbs.59918] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Accepted: 04/23/2021] [Indexed: 12/27/2022] Open
Abstract
The transient receptor potential cation channel subfamily V member 1 (TRPV1) is a transmembrane protein that can be activated by various physical and chemical stimuli and is associated with pain transduction. In recent years, TRPV1 was discovered to play essential roles in cancer tumorigenesis and development, as TRPV1 expression levels are altered in numerous cancer cell types. Several investigations have discovered direct associations between TRPV1 and cancer cell proliferation, cell death, and metastasis. Furthermore, about two dozen TRPV1 agonists/antagonists are under clinical trial, as TRPV1 is a potential drug target for treating various diseases. Hence, more researchers are focusing on the effects of TRPV1 agonists or antagonists on cancer tumorigenesis and development. However, both agonists and antagonists may reveal anti-cancer effects, and the effect may function via or be independent of TRPV1. In this review, we provide an overview of the impact of TRPV1 on cancer cell proliferation, cell death, and metastasis, as well as on cancer therapy and the tumor microenvironment, and consider the implications of using TRPV1 agonists and antagonists for future research and potential therapeutic approaches.
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Affiliation(s)
- Li Li
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen University International Cancer Center, Department of Cell Biology and Genetics, School of Medicine, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518055, China
| | - Cheng Chen
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen University International Cancer Center, Department of Cell Biology and Genetics, School of Medicine, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518055, China
| | - Chengyao Chiang
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen University International Cancer Center, Department of Cell Biology and Genetics, School of Medicine, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518055, China
| | - Tian Xiao
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen University International Cancer Center, Department of Cell Biology and Genetics, School of Medicine, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518055, China
| | - Yangchao Chen
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
| | - Yongxiang Zhao
- National Center for International Research of Biological Targeting Diagnosis and Therapy (Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research), Guangxi Medical University, Nanning, China
| | - Duo Zheng
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen University International Cancer Center, Department of Cell Biology and Genetics, School of Medicine, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518055, China
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Ramal-Sanchez M, Bernabò N, Valbonetti L, Cimini C, Taraschi A, Capacchietti G, Machado-Simoes J, Barboni B. Role and Modulation of TRPV1 in Mammalian Spermatozoa: An Updated Review. Int J Mol Sci 2021; 22:4306. [PMID: 33919147 PMCID: PMC8122410 DOI: 10.3390/ijms22094306] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/19/2021] [Accepted: 04/19/2021] [Indexed: 12/26/2022] Open
Abstract
Based on the abundance of scientific publications, the polymodal sensor TRPV1 is known as one of the most studied proteins within the TRP channel family. This receptor has been found in numerous cell types from different species as well as in spermatozoa. The present review is focused on analyzing the role played by this important channel in the post-ejaculatory life of spermatozoa, where it has been described to be involved in events such as capacitation, acrosome reaction, calcium trafficking, sperm migration, and fertilization. By performing an exhaustive bibliographic search, this review gathers, for the first time, all the modulators of the TRPV1 function that, to our knowledge, were described to date in different species and cell types. Moreover, all those modulators with a relationship with the reproductive process, either found in the female tract, seminal plasma, or spermatozoa, are presented here. Since the sperm migration through the female reproductive tract is one of the most intriguing and less understood events of the fertilization process, in the present work, chemotaxis, thermotaxis, and rheotaxis guiding mechanisms and their relationship with TRPV1 receptor are deeply analyzed, hypothesizing its (in)direct participation during the sperm migration. Last, TRPV1 is presented as a pharmacological target, with a special focus on humans and some pathologies in mammals strictly related to the male reproductive system.
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Affiliation(s)
- Marina Ramal-Sanchez
- Faculty of Biosciences and Technology for Food, Agriculture and Environment, University of Teramo, 64100 Teramo, Italy; (N.B.); (L.V.); (C.C.); (A.T.); (G.C.); (J.M.-S.); (B.B.)
| | - Nicola Bernabò
- Faculty of Biosciences and Technology for Food, Agriculture and Environment, University of Teramo, 64100 Teramo, Italy; (N.B.); (L.V.); (C.C.); (A.T.); (G.C.); (J.M.-S.); (B.B.)
- Institute of Biochemistry and Cell Biology (CNR-IBBC/EMMA/Infrafrontier/IMPC), National Research Council, Monterotondo Scalo, 00015 Rome, Italy
| | - Luca Valbonetti
- Faculty of Biosciences and Technology for Food, Agriculture and Environment, University of Teramo, 64100 Teramo, Italy; (N.B.); (L.V.); (C.C.); (A.T.); (G.C.); (J.M.-S.); (B.B.)
- Institute of Biochemistry and Cell Biology (CNR-IBBC/EMMA/Infrafrontier/IMPC), National Research Council, Monterotondo Scalo, 00015 Rome, Italy
| | - Costanza Cimini
- Faculty of Biosciences and Technology for Food, Agriculture and Environment, University of Teramo, 64100 Teramo, Italy; (N.B.); (L.V.); (C.C.); (A.T.); (G.C.); (J.M.-S.); (B.B.)
| | - Angela Taraschi
- Faculty of Biosciences and Technology for Food, Agriculture and Environment, University of Teramo, 64100 Teramo, Italy; (N.B.); (L.V.); (C.C.); (A.T.); (G.C.); (J.M.-S.); (B.B.)
- Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise “G. Caporale”, Via Campo Boario 1, 64100 Teramo, Italy
| | - Giulia Capacchietti
- Faculty of Biosciences and Technology for Food, Agriculture and Environment, University of Teramo, 64100 Teramo, Italy; (N.B.); (L.V.); (C.C.); (A.T.); (G.C.); (J.M.-S.); (B.B.)
| | - Juliana Machado-Simoes
- Faculty of Biosciences and Technology for Food, Agriculture and Environment, University of Teramo, 64100 Teramo, Italy; (N.B.); (L.V.); (C.C.); (A.T.); (G.C.); (J.M.-S.); (B.B.)
| | - Barbara Barboni
- Faculty of Biosciences and Technology for Food, Agriculture and Environment, University of Teramo, 64100 Teramo, Italy; (N.B.); (L.V.); (C.C.); (A.T.); (G.C.); (J.M.-S.); (B.B.)
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Kitte R, Tretbar M, Dluczek S, Beckmann L, Marquardt P, Duenkel A, Schubert A, Fricke S, Tretbar US. Chemical and Cytotoxic Activity of three main Sesquiterpenoids from Warburgia ugandensis. RESULTS IN CHEMISTRY 2021. [DOI: 10.1016/j.rechem.2021.100242] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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8
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Ferreira BA, Norton Filho AF, Deconte SR, Tomiosso TC, Thevenard F, Andrade SP, Lago JHG, Araújo FDA. Sesquiterpene Polygodial from Drimys brasiliensis (Winteraceae) Down-Regulates Implant-Induced Inflammation and Fibrogenesis in Mice. JOURNAL OF NATURAL PRODUCTS 2020; 83:3698-3705. [PMID: 33232149 DOI: 10.1021/acs.jnatprod.0c00958] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Drimys brasiliensis (Winteraceae) has been investigated in traditional medicine for its anti-inflammatory properties to treat gastric ulcers and allergic and respiratory system diseases as well as for cancer treatment. In this work, we investigate the ability of the sesquiterpene polygodial, isolated from D. brasiliensis stem barks, to modulate the chronic inflammatory response induced by polyester-polyurethane sponge implants in C57BL/6J mice. Daily treatment with polygodial inhibited the macrophage content in the implants as determined by the activity of the N-acetyl-β-d-glucosaminidase enzyme as well as decreased the levels of CXCL1/KC and CCL2/JE/MCP-1 pro-inflammatory chemokines and the presence of mast cells along the formed fibrovascular tissue. Similarly, the deposition of a new extracellular matrix (total collagen and type I and III collagen fibers) as well as the production of the TGF-β1 cytokine were attenuated in implants treated with polygodial, showing for the first time its antifibrogenic capacity. The hemoglobin content, the number of newly formed vessels, and the levels of VEGF cytokine, which were used as parameters for the assessment of the neovascularization of the implants, did not change after treatment with polygodial. The anti-inflammatory and antifibrogenic effects of polygodial over the components of the granulation tissue induced by the sponge implant indicate a therapeutic potential for the treatment of inflammatory diseases associated with the development of fibrovascular tissue.
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Affiliation(s)
- Bruno Antonio Ferreira
- Programa de Pós-graduação em Genética e Bioquímica, Instituto de Biotecnologia, Universidade Federal de Uberlândia (UFU), Uberlândia, MG 38408-100, Brazil
| | - Anderson Ferraz Norton Filho
- Departamento de Ciências Fisiológicas, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia (UFU), Uberlândia, MG 38408-100, Brazil
| | - Simone Ramos Deconte
- Departamento de Ciências Fisiológicas, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia (UFU), Uberlândia, MG 38408-100, Brazil
| | - Tatiana Carla Tomiosso
- Departamento de Biologia Celular, Histologia e Embriologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia (UFU), Uberlândia, MG 38408-100, Brazil
| | - Fernanda Thevenard
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP 09210-580, Brazil
| | - Silvia Passos Andrade
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | | | - Fernanda de Assis Araújo
- Departamento de Ciências Fisiológicas, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia (UFU), Uberlândia, MG 38408-100, Brazil
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Modulation of TRPV1 channel function by natural products in the treatment of pain. Chem Biol Interact 2020; 330:109178. [DOI: 10.1016/j.cbi.2020.109178] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 05/22/2020] [Accepted: 06/09/2020] [Indexed: 01/01/2023]
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10
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De La Chapa J, Singha PK, Sallaway M, Self K, Nasreldin R, Dasari R, Hart M, Kornienko A, Just J, Smith JA, Bissember AC, Gonzales CB. Novel polygodial analogs P3 and P27: Efficacious therapeutic agents disrupting mitochondrial function in oral squamous cell carcinoma. Int J Oncol 2018; 53:2627-2636. [PMID: 30320372 PMCID: PMC6203145 DOI: 10.3892/ijo.2018.4585] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 07/03/2018] [Indexed: 01/05/2023] Open
Abstract
Polygodial, a drimane sesquiterpenoid dialdehyde isolated as a pungent component of the water pepper Persicaria hydropiper, exhibits antifeedant, antimicrobial, anti-inflammatory and anticancer effects. Polygodial also activates transient receptor potential vanilloid subtype 1 (TRPV1) channels. Previously, we described the synthesis of a C12-Wittig derivative of polygodial, termed P3, with significant antiproliferative effects against multiple cancer types including oral squamous cell carcinoma (OSCC). In the present study, a more potent derivative, P27, with superior anti-proliferative effects in vitro and antitumor effects in Cal-27 derived xenografts is described. Polygodial, P3, and P27 all significantly decreased OSCC tumor growth, with P27 being equipotent with polygodial and P3 being the least efficacious. However, neither analog elicited the adverse effect observed with polygodial: Profound transient inflammation. Although P3 and P27 pharmacophores are based on polygodial, novel effects on OSCC cell cycle distribution were identified and shared anticancer effects that are independent of TRPV1 activity were observed. Polygodial elicits an S-phase block, whereas P3 and P27 lead to G2/M phase arrest. Pretreatment of OSCC cells with the TRPV1 antagonist capsazepine does not affect the antiproliferative activity of P3 or P27, indicating that TRPV1 interactions do not regulate OSCC cell proliferation. Indeed, calcium imaging studies identified that the analogs neither activate nor antagonize TRPV1. Behavioral studies using a rat model for orofacial pain confirmed that these analogs fail to induce nocifensive responses, indicating that they are non-noxious in vivo. All compounds induced a significant concentration-dependent decrease in the mitochondrial transmembrane potential and corresponding apoptosis. Considering that P27 is equipotent to polygodial with no TRPV1-associated adverse effects, P27 may serve as an efficacious novel therapy for OSCC.
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Affiliation(s)
- Jorge De La Chapa
- Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio School of Dentistry, San Antonio, TX 78229-3900, USA
| | - Prajjal Kanti Singha
- Department of Pathology, University of Texas Health Science Center at San Antonio School of Medicine, San Antonio, TX 78229-3900, USA
| | - Mckay Sallaway
- Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio School of Dentistry, San Antonio, TX 78229-3900, USA
| | - Kristen Self
- Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio School of Dentistry, San Antonio, TX 78229-3900, USA
| | - Ranna Nasreldin
- Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio School of Dentistry, San Antonio, TX 78229-3900, USA
| | - Ramesh Dasari
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX 78666-4684, USA
| | - Matthew Hart
- Center for Innovation in Drug Discovery High Throughput Facility, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229-3900, USA
| | - Alexander Kornienko
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX 78666-4684, USA
| | - Jeremy Just
- School of Physical Sciences - Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Jason A Smith
- School of Physical Sciences - Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Alex C Bissember
- School of Physical Sciences - Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Cara B Gonzales
- Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio School of Dentistry, San Antonio, TX 78229-3900, USA
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Effect of polygodial and its direct derivatives on the mammalian Na +/K +-ATPase activity. Eur J Pharmacol 2018; 831:1-8. [PMID: 29715454 DOI: 10.1016/j.ejphar.2018.04.031] [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: 09/21/2017] [Revised: 04/06/2018] [Accepted: 04/26/2018] [Indexed: 11/23/2022]
Abstract
The sesquiterpene polygodial is an agonist of the transient receptor potential vanilloid 1 (TRPV1). Our group recently reported the synthesis and anticancer effects of polygodial and its derivatives, and showed that these compounds retain activity against apoptosis- and multidrug-resistant cancer cells. Herein, we tested the inhibitory effect of these compounds on the activity of the enzyme Na+/K+-ATPase (NKA) from kidney (α1 isoform) and brain (α2 and α3 isoforms) guinea pig extracts. Polygodial (1) displayed a dose-dependent inhibition of both kidney and brain purified NKA preparations, with higher sensitivity for the cerebral isoforms. Polygo-11,12-diol (2) and C11,C12-pyridazine derivative (3) proved to be poor inhibitors. Unsaturated ester (4) and 9-epipolygodial (5) inhibited NKA preparations from brain and kidney, with the same inhibitory potency. Nevertheless, they did not achieve maximum inhibition even at higher concentration. Comparing the inhibitory potency in crude homogenates and purified preparations of NKA, compounds 4 and 5 revealed a degree of selectivity toward the renal enzyme. Kinetic studies showed a non-competitive inhibition for Na+ and K+ by compounds 1, 4 and 5 and for ATP by 1 and 4. However, compound 5 presented a competitive inhibition type. Furthermore, K+-activated p-nitrophenylphosphatase activity of these purified preparations was not inhibited by 1, 4 and 5, suggesting that these compounds acted in the initial phase of the enzyme's catalytic cycle. These findings suggest that the antitumor action of polygodial and its analogues may be linked to their NKA inhibitory properties and reinforce that NKA may be an important target for cancer therapy.
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Antiproliferative and toxicological properties of drimanes obtained from Drimys brasiliensis stem barks. Biomed Pharmacother 2018; 103:1498-1506. [DOI: 10.1016/j.biopha.2018.04.103] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 04/11/2018] [Accepted: 04/13/2018] [Indexed: 01/04/2023] Open
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Rihak KJ, Bissember AC, Smith JA. Polygodial: A viable natural product scaffold for the rapid synthesis of novel polycyclic pyrrole and pyrrolidine derivatives. Tetrahedron 2018. [DOI: 10.1016/j.tet.2017.10.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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14
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Kornienko A, La Clair JJ. Covalent modification of biological targets with natural products through Paal-Knorr pyrrole formation. Nat Prod Rep 2017; 34:1051-1060. [PMID: 28808718 PMCID: PMC5759776 DOI: 10.1039/c7np00024c] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Covering: up to June 2017Natural products and endogenous metabolites engage specific targets within tissues and cells through complex mechanisms. This review examines the extent to which natural systems have adopted the Paal-Knorr reaction to engage nucleophilic amine groups within biological targets. Current understanding of this mode of reactivity is limited by only a few examples of this reaction in a biological context. This highlight is intended to stimulate the scientific community to identify potential research directions and applications of the Paal-Knorr reaction in native and engineered biological systems.
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Affiliation(s)
- Alexander Kornienko
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX 78666, USA.
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Moodie LWK, Trepos R, Cervin G, Larsen L, Larsen DS, Pavia H, Hellio C, Cahill P, Svenson J. Probing the Structure-Activity Relationship of the Natural Antifouling Agent Polygodial against both Micro- and Macrofoulers by Semisynthetic Modification. JOURNAL OF NATURAL PRODUCTS 2017; 80:515-525. [PMID: 28170258 DOI: 10.1021/acs.jnatprod.6b01056] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The current study represents the first comprehensive investigation into the general antifouling activities of the natural drimane sesquiterpene polygodial. Previous studies have highlighted a high antifouling effect toward macrofoulers, such as ascidians, tubeworms, and mussels, but no reports about the general antifouling effect of polygodial have been communicated before. To probe the structural and chemical basis for antifouling activity, a library of 11 polygodial analogues was prepared by semisynthesis. The library was designed to yield derivatives with ranging polarities and the ability to engage in both covalent and noncovalent interactions, while still remaining within the drimane sesquiterpene scaffold. The prepared compounds were screened against 14 relevant marine micro- and macrofouling species. Several of the polygodial analogues displayed inhibitory activities at sub-microgram/mL concentrations. These antifouling effects were most pronounced against the macrofouling ascidian Ciona savignyi and the barnacle Balanus improvisus, with inhibitory activities observed for selected compounds comparable or superior to several commercial antifouling products. The inhibitory activity against the microfouling bacteria and microalgae was reversible and significantly less pronounced than for the macrofoulers. This study illustrates that the macro- and microfoulers are targeted by the compounds via different mechanisms.
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Affiliation(s)
- Lindon W K Moodie
- Department of Chemistry, UiT The Arctic University of Norway , Breivika, N-9037, Tromsø, Norway
| | - Rozenn Trepos
- Biodimar LEMAR UMR 6539, Université de Bretagne Occidentale , 6 Avenue le Gorgeu, 29200 Brest, France
| | - Gunnar Cervin
- Department of Marine Sciences - Tjärnö, University of Gothenburg , SE-452 96 Strömstad, Sweden
| | - Lesley Larsen
- Department of Chemistry, University of Otago , P.O. Box 56, Dunedin, New Zealand
| | - David S Larsen
- Department of Chemistry, University of Otago , P.O. Box 56, Dunedin, New Zealand
| | - Henrik Pavia
- Department of Marine Sciences - Tjärnö, University of Gothenburg , SE-452 96 Strömstad, Sweden
| | - Claire Hellio
- Biodimar LEMAR UMR 6539, Université de Bretagne Occidentale , 6 Avenue le Gorgeu, 29200 Brest, France
| | - Patrick Cahill
- Cawthron Institute , 98 Halifax Street East, Nelson 7010, New Zealand
| | - Johan Svenson
- Department of Chemistry, UiT The Arctic University of Norway , Breivika, N-9037, Tromsø, Norway
- Department of Chemistry, Material and Surfaces, SP Technical Research Institute of Sweden , Box 857, SE-501 15 Borås, Sweden
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16
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Mollo E, Garson MJ, Polese G, Amodeo P, Ghiselin MT. Taste and smell in aquatic and terrestrial environments. Nat Prod Rep 2017; 34:496-513. [DOI: 10.1039/c7np00008a] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The review summarizes results up to 2017 on chemosensory cues occurring in both aquatic and terrestrial environments.
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Affiliation(s)
- E. Mollo
- National Research Council of Italy
- Institute of Biomolecular Chemistry
- Italy
| | - M. J. Garson
- University of Queensland
- School of Chemistry and Molecular Sciences
- Brisbane Q 4072
- Australia
| | - G. Polese
- University of Naples “Federico II”
- Department of Biology
- 80126 Naples
- Italy
| | - P. Amodeo
- National Research Council of Italy
- Institute of Biomolecular Chemistry
- Italy
| | - M. T. Ghiselin
- California Academy of Sciences
- Department of Invertebrate Zoology
- San Francisco
- USA
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17
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Dutra RC, Campos MM, Santos AR, Calixto JB. Medicinal plants in Brazil: Pharmacological studies, drug discovery, challenges and perspectives. Pharmacol Res 2016; 112:4-29. [DOI: 10.1016/j.phrs.2016.01.021] [Citation(s) in RCA: 138] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 01/17/2016] [Indexed: 12/16/2022]
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18
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Fratoni E, Claudino VD, Yunes RA, Franchi GC, Nowill AE, Filho VC, Monache FD, Malheiros A. Further drimane sesquiterpenes from Drimys brasiliensis stem barks with cytotoxic potential. Naunyn Schmiedebergs Arch Pharmacol 2016; 389:791-7. [PMID: 27095358 DOI: 10.1007/s00210-016-1241-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 03/31/2016] [Indexed: 11/25/2022]
Abstract
Drimys brasiliensis Miers (Winteraceae) is used in folk medicine for the treatment of cancer. Its anti-tumor activity has been demonstrated in vitro models using extracts and isolated compounds. This study investigates the cytotoxic effects of stem bark extracts of D. brasiliensis as well as isolated compounds that may be responsible for the activitys and evaluates them in leukemia cells. The stem bark extract were subjected to column chromatography, and the structures of compounds were elucidated based on spectroscopic methods by using NMR and infrared spectroscopy and GC/MS. The cytotoxicity of the isolated compounds was evaluated in chronic myeloid (K562) and acute B lymphoblastic (Nalm6) leukemia cells using tetrazolium assay (MTT). Two new compounds were isolated 1β-O-p-methoxy-E-cinnamoyl-5α-keto-11α-enol-albicanol (1a) and the isomer 1β-O-p-methoxy-E-cinnamoyl-5α-keto-11β-enol-albicanol (1b) and 1β-O-p-methoxy-E-cinnamoyl-isodrimeninol (2). The known compounds polygonal acid (3a) and the isomer isopolygonal acid (3b), fuegin (4a) and the isomer epifuegin (4b), the mixture drimanial (5) and 1β-O-(p-methoxy-E-cinnamoyl)-6α-hydroxypolygodial (6) were also isolated. The drimanes (1-4) and drimanial (5), 1β-(p-coumaroyloxy)-polygodial (7), 1β-(p-methoxycinnamoyl)-polygodial (8), and polygodial (9) isolated previously were assessed in tumor cells. The IC50 values were between 3.56 and 128.91 μM. 1-β-(p-cumaroiloxi)-polygodial showed the best result with IC50 8.18 and 3.56 μM by K562 and Nalm6, respectively. The chloroform extract of the stem bark of D. brasiliensis is a great source of drimane sesquiterpenes. Our experimental data suggest that drimanes are responsible for cytotoxicity activity demonstrated by this species, especially those with the aldehyde group linked to carbons C-11 and C-12.
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MESH Headings
- Antineoplastic Agents, Phytogenic/chemistry
- Antineoplastic Agents, Phytogenic/isolation & purification
- Antineoplastic Agents, Phytogenic/pharmacology
- Cell Survival/drug effects
- Dose-Response Relationship, Drug
- Drimys/chemistry
- Gas Chromatography-Mass Spectrometry
- Humans
- Inhibitory Concentration 50
- K562 Cells
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/drug therapy
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Magnetic Resonance Spectroscopy
- Molecular Structure
- Phytotherapy
- Plant Bark/chemistry
- Plant Stems/chemistry
- Plants, Medicinal
- Polycyclic Sesquiterpenes
- Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/drug therapy
- Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/pathology
- Sesquiterpenes/chemistry
- Sesquiterpenes/isolation & purification
- Sesquiterpenes/pharmacology
- Spectrophotometry, Infrared
- Structure-Activity Relationship
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Affiliation(s)
- Eduarda Fratoni
- Programa de Pós-Graduação em Ciências Farmacêuticas e Núcleo de Investigações Químico-Farmacêuticas, Universidade do Vale do Itajaí - UNIVALI, Itajaí, SC, CEP 88302-202, Brazil
| | - Vanessa Duarte Claudino
- Programa de Pós-Graduação em Ciências Farmacêuticas e Núcleo de Investigações Químico-Farmacêuticas, Universidade do Vale do Itajaí - UNIVALI, Itajaí, SC, CEP 88302-202, Brazil
| | - Rosendo Augusto Yunes
- Programa de Pós-Graduação em Química, Universidade Federal de Santa Catarina - UFSC, Florianópolis, SC, CEP 88040-970, Brazil
| | - Gilberto C Franchi
- Centro Integrado de Pesquisas Oncohematológicas na Infância (CIPOI), UNICAMP, Campinas, SP, CEP 13083-970, Brazil
| | - Alexandre E Nowill
- Centro Integrado de Pesquisas Oncohematológicas na Infância (CIPOI), UNICAMP, Campinas, SP, CEP 13083-970, Brazil
| | - Valdir Cechinel Filho
- Programa de Pós-Graduação em Ciências Farmacêuticas e Núcleo de Investigações Químico-Farmacêuticas, Universidade do Vale do Itajaí - UNIVALI, Itajaí, SC, CEP 88302-202, Brazil
| | - Franco Delle Monache
- Programa de Pós-Graduação em Ciências Farmacêuticas e Núcleo de Investigações Químico-Farmacêuticas, Universidade do Vale do Itajaí - UNIVALI, Itajaí, SC, CEP 88302-202, Brazil
| | - Angela Malheiros
- Programa de Pós-Graduação em Ciências Farmacêuticas e Núcleo de Investigações Químico-Farmacêuticas, Universidade do Vale do Itajaí - UNIVALI, Itajaí, SC, CEP 88302-202, Brazil.
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19
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Dasari R, De Carvalho A, Medellin DC, Middleton KN, Hague F, Volmar MNM, Frolova LV, Rossato MF, De La Chapa JJ, Dybdal-Hargreaves NF, Pillai A, Mathieu V, Rogelj S, Gonzales CB, Calixto JB, Evidente A, Gautier M, Munirathinam G, Glass R, Burth P, Pelly SC, van Otterlo WAL, Kiss R, Kornienko A. Synthetic and Biological Studies of Sesquiterpene Polygodial: Activity of 9-Epipolygodial against Drug-Resistant Cancer Cells. ChemMedChem 2015; 10:2014-26. [PMID: 26434977 PMCID: PMC4831215 DOI: 10.1002/cmdc.201500360] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Indexed: 12/18/2022]
Abstract
Polygodial, a terpenoid dialdehyde isolated from Polygonum hydropiper L., is a known agonist of the transient receptor potential vanilloid 1 (TRPV1). In this investigation a series of polygodial analogues were prepared and investigated for TRPV1-agonist and anticancer activities. These experiments led to the identification of 9-epipolygodial, which has antiproliferative potency significantly exceeding that of polygodial. 9-Epipolygodial was found to maintain potency against apoptosis-resistant cancer cells as well as those displaying the multidrug-resistant (MDR) phenotype. In addition, the chemical feasibility for the previously proposed mechanism of action of polygodial, involving the formation of a Paal-Knorr pyrrole with a lysine residue on the target protein, was demonstrated by the synthesis of a stable polygodial pyrrole derivative. These studies reveal rich chemical and biological properties associated with polygodial and its direct derivatives. These compounds should inspire further work in this area aimed at the development of new pharmacological agents, or the exploration of novel mechanisms of covalent modification of biological molecules with natural products.
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Affiliation(s)
- Ramesh Dasari
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX, 78666, USA
| | - Annelise De Carvalho
- Laboratoire de Cancérologie et de Toxicologie Expérimentale, Faculté de Pharmacie, Université Libre de Bruxelles, 1050, Brussels, Belgium
| | - Derek C Medellin
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX, 78666, USA
| | - Kelsey N Middleton
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX, 78666, USA
| | - Frédéric Hague
- Laboratoire de Physiologie Cellulaire et Moléculaire, Faculté des Sciences, Université de Picardie Jules Verne, 80000, Amiens, France
| | - Marie N M Volmar
- Neurosurgical Research, University Clinics Munich, Marchioninistr. 15, 81377, Munich, Germany
| | - Liliya V Frolova
- Departments of Chemistry and Biology, New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, NM, 87801, USA
| | - Mateus F Rossato
- Center of Innovation and Preclinical Studies, Av. Luiz Boiteux Piazza 1302, Cachoeira do Bom Jesus, Florianópolis, SC, 88056-000, Brazil
- Department of Pharmacology, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Jorge J De La Chapa
- Department of Comprehensive Dentistry, Cancer Therapy and Research Center, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, USA
| | - Nicholas F Dybdal-Hargreaves
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, USA
| | - Akshita Pillai
- Department of Biomedical Sciences, College of Medicine, University of Illinois, 1601 Parkview Ave., Rockford, IL, 61107, USA
| | - Véronique Mathieu
- Laboratoire de Cancérologie et de Toxicologie Expérimentale, Faculté de Pharmacie, Université Libre de Bruxelles, 1050, Brussels, Belgium
| | - Snezna Rogelj
- Departments of Chemistry and Biology, New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, NM, 87801, USA
| | - Cara B Gonzales
- Department of Comprehensive Dentistry, Cancer Therapy and Research Center, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, USA
| | - João B Calixto
- Center of Innovation and Preclinical Studies, Av. Luiz Boiteux Piazza 1302, Cachoeira do Bom Jesus, Florianópolis, SC, 88056-000, Brazil
- Department of Pharmacology, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Antonio Evidente
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario Monte Sant'Angelo, Via Cintia 4, 80126, Napoli, Italy
| | - Mathieu Gautier
- Laboratoire de Physiologie Cellulaire et Moléculaire, Faculté des Sciences, Université de Picardie Jules Verne, 80000, Amiens, France
| | - Gnanasekar Munirathinam
- Department of Biomedical Sciences, College of Medicine, University of Illinois, 1601 Parkview Ave., Rockford, IL, 61107, USA
| | - Rainer Glass
- Neurosurgical Research, University Clinics Munich, Marchioninistr. 15, 81377, Munich, Germany
| | - Patricia Burth
- Departamento de Biologia Celular e Molecular, Instituto de Biologia, Universidade Federal Fluminense, Outeiro de São João Batista, s/n Campus do Valonguinho, Centro-Niterói, RJ, 24020-140, Brazil
| | - Stephen C Pelly
- Department of Chemistry and Polymer Science, Stellenbosch University, Stellenbosch, Private Bag X1, Matieland, 7602, South Africa
| | - Willem A L van Otterlo
- Department of Chemistry and Polymer Science, Stellenbosch University, Stellenbosch, Private Bag X1, Matieland, 7602, South Africa
| | - Robert Kiss
- Laboratoire de Cancérologie et de Toxicologie Expérimentale, Faculté de Pharmacie, Université Libre de Bruxelles, 1050, Brussels, Belgium
| | - Alexander Kornienko
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX, 78666, USA.
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20
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Dasari R, De Carvalho A, Medellin DC, Middleton KN, Hague F, Volmar MNM, Frolova LV, Rossato MF, De La Chapa JJ, Dybdal-Hargreaves NF, Pillai A, Kälin RE, Mathieu V, Rogelj S, Gonzales CB, Calixto JB, Evidente A, Gautier M, Munirathinam G, Glass R, Burth P, Pelly SC, van Otterlo WAL, Kiss R, Kornienko A. Wittig derivatization of sesquiterpenoid polygodial leads to cytostatic agents with activity against drug resistant cancer cells and capable of pyrrolylation of primary amines. Eur J Med Chem 2015; 103:226-37. [PMID: 26360047 DOI: 10.1016/j.ejmech.2015.08.047] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 08/22/2015] [Accepted: 08/24/2015] [Indexed: 12/13/2022]
Abstract
Many types of cancer, including glioma, melanoma, non-small cell lung cancer (NSCLC), among others, are resistant to proapoptotic stimuli and thus poorly responsive to current therapies based on the induction of apoptosis in cancer cells. The current investigation describes the synthesis and anticancer evaluation of unique C12-Wittig derivatives of polygodial, a sesquiterpenoid dialdehyde isolated from Persicaria hydropiper (L.) Delabre. These compounds were found to undergo an unprecedented pyrrole formation with primary amines in a chemical model system, a reaction that could be relevant in the biological environment and lead to the pyrrolation of lysine residues in the target proteins. The anticancer evaluation of these compounds revealed their promising activity against cancer cells displaying various forms of drug resistance, including resistance to proapoptotic agents. Mechanistic studies indicated that compared to the parent polygodial, which displays fixative general cytotoxic action against human cells, the C12-Wittig derivatives exerted their antiproliferative action mainly through cytostatic effects explaining their activity against apoptosis-resistant cancer cells. The possibility for an intriguing covalent modification of proteins through a novel pyrrole formation reaction, as well as useful activities against drug resistant cancer cells, make the described polygodial-derived chemical scaffold an interesting new chemotype warranting thorough investigation.
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Affiliation(s)
- Ramesh Dasari
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX 78666, USA
| | - Annelise De Carvalho
- Laboratoire de Cancérologie et de Toxicologie Expérimentale, Faculté de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
| | - Derek C Medellin
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX 78666, USA
| | - Kelsey N Middleton
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX 78666, USA
| | - Frédéric Hague
- Laboratoire de Physiologie Cellulaire et Moléculaire, Faculté des Sciences, Université de Picardie Jules Verne, Amiens, France
| | - Marie N M Volmar
- Neurosurgical Research, University Clinics Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Liliya V Frolova
- Department of Chemistry, New Mexico Tech, 801 Leroy Place, Socorro, NM 87801, USA; Department of Biology, New Mexico Tech, 801 Leroy Place, Socorro, NM 87801, USA
| | - Mateus F Rossato
- Center of Innovation and Preclinical Studies, Luiz Boiteux Piazza 1302, Cachoeira do Bom Jesus, Brazil; Department of Pharmacology, UFSC, Florianópolis SC 88.056-000, Brazil
| | - Jorge J De La Chapa
- Department of Comprehensive Dentistry, Cancer Therapy and Research Center, UTHSCSA, San Antonio, TX 78229, USA
| | | | - Akshita Pillai
- Department of Biomedical Sciences, University of Illinois, College of Medicine, 1601 Parkview Ave, Rockford, IL 61107, USA
| | - Roland E Kälin
- Neurosurgical Research, University Clinics Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Véronique Mathieu
- Laboratoire de Cancérologie et de Toxicologie Expérimentale, Faculté de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
| | - Snezna Rogelj
- Department of Chemistry, New Mexico Tech, 801 Leroy Place, Socorro, NM 87801, USA; Department of Biology, New Mexico Tech, 801 Leroy Place, Socorro, NM 87801, USA
| | - Cara B Gonzales
- Department of Comprehensive Dentistry, Cancer Therapy and Research Center, UTHSCSA, San Antonio, TX 78229, USA
| | - João B Calixto
- Center of Innovation and Preclinical Studies, Luiz Boiteux Piazza 1302, Cachoeira do Bom Jesus, Brazil; Department of Pharmacology, UFSC, Florianópolis SC 88.056-000, Brazil
| | - Antonio Evidente
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario Monte Sant'Angelo, Via Cintia 4, 80126 Napoli, Italy
| | - Mathieu Gautier
- Laboratoire de Physiologie Cellulaire et Moléculaire, Faculté des Sciences, Université de Picardie Jules Verne, Amiens, France
| | - Gnanasekar Munirathinam
- Department of Biomedical Sciences, University of Illinois, College of Medicine, 1601 Parkview Ave, Rockford, IL 61107, USA
| | - Rainer Glass
- Neurosurgical Research, University Clinics Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Patricia Burth
- Departamento de Biologia Celular e Molecular, Instituto de Biologia, Universidade Federal Fluminense, Outeiro de São João Batista, s/n° Campus do Valonguinho, Centro-Niterói, RJ 24020-140, Brazil
| | - Stephen C Pelly
- Department of Chemistry and Polymer Science, Stellenbosch University, Stellenbosch, Private Bag X1, Matieland, 7602, South Africa
| | - Willem A L van Otterlo
- Department of Chemistry and Polymer Science, Stellenbosch University, Stellenbosch, Private Bag X1, Matieland, 7602, South Africa
| | - Robert Kiss
- Laboratoire de Cancérologie et de Toxicologie Expérimentale, Faculté de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
| | - Alexander Kornienko
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX 78666, USA.
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21
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Abstract
![]()
To
date, 28 mammalian transient receptor potential (TRP) channels
have been cloned and characterized. They are grouped into six subfamilies
on the basis of their amino acid sequence homology: TRP Ankyrin (TRPA),
TRP Canonical (TRPC), TRP Melastatin (TRPM), TRP Mucolipin (TRPML),
TRP Polycystin (TRPP), and TRP Vanilloid (TRPV). Most of the TRP channels
are nonselective cation channels expressed on the cell membrane and
exhibit variable permeability ratios for Ca2+ versus Na+. They mediate sensory functions (such as vision, nociception,
taste transduction, temperature sensation, and pheromone signaling)
and homeostatic functions (such as divalent cation flux, hormone release,
and osmoregulation). Significant progress has been made in our understanding
of the specific roles of these TRP channels and their activation mechanisms.
In this Review, the emphasis will be on the activation of TRP channels
by phytochemicals that are claimed to exert health benefits. Recent
findings complement the anecdotal evidence that some of these phytochemicals
have specific receptors and the activation of which is responsible
for the physiological effects. Now, the targets for these phytochemicals
are being unveiled; a specific hypothesis can be proposed and tested
experimentally to infer a scientific validity of the claims of the
health benefits. The broader and pressing issues that have to be addressed
are related to the quantities of the active ingredients in a given
preparation, their bioavailability, metabolism, adverse effects, excretion,
and systemic versus local effects.
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Affiliation(s)
- Louis S. Premkumar
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, Illinois 62702, United States
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22
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Kaneko Y, Szallasi A. Transient receptor potential (TRP) channels: a clinical perspective. Br J Pharmacol 2014; 171:2474-507. [PMID: 24102319 PMCID: PMC4008995 DOI: 10.1111/bph.12414] [Citation(s) in RCA: 283] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 08/28/2013] [Accepted: 08/31/2013] [Indexed: 12/14/2022] Open
Abstract
Transient receptor potential (TRP) channels are important mediators of sensory signals with marked effects on cellular functions and signalling pathways. Indeed, mutations in genes encoding TRP channels are the cause of several inherited diseases in humans (the so-called 'TRP channelopathies') that affect the cardiovascular, renal, skeletal and nervous systems. TRP channels are also promising targets for drug discovery. The initial focus of research was on TRP channels that are expressed on nociceptive neurons. Indeed, a number of potent, small-molecule TRPV1, TRPV3 and TRPA1 antagonists have already entered clinical trials as novel analgesic agents. There has been a recent upsurge in the amount of work that expands TRP channel drug discovery efforts into new disease areas such as asthma, cancer, anxiety, cardiac hypertrophy, as well as obesity and metabolic disorders. A better understanding of TRP channel functions in health and disease should lead to the discovery of first-in-class drugs for these intractable diseases. With this review, we hope to capture the current state of this rapidly expanding and changing field.
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Affiliation(s)
- Yosuke Kaneko
- Discovery Research Alliance, Ono Pharmaceutical Co. LtdOsaka, Japan
| | - Arpad Szallasi
- Department of Pathology and Laboratory Medicine, Monmouth Medical CenterLong Branch, NJ, USA
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23
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Abstract
The use of medicinal plants or other naturally derived products to relieve illness can be traced back over several millennia, and these natural products are still extensively used nowadays. Studies on natural products have, over the years, enormously contributed to the development of therapeutic drugs used in modern medicine. By means of the use of these substances as selective agonists, antagonists, enzyme inhibitors or activators, it has been possible to understand the complex function of many relevant targets. For instance, in an attempt to understand how pepper species evoke hot and painful actions, the pungent and active constituent capsaicin (from Capsicum sp.) was isolated in 1846 and the receptor for the biological actions of capsaicin was cloned in 1997, which is now known as TRPV1 (transient receptor potential vanilloid 1). Thus, TRPV1 agonists and antagonists have currently been tested in order to find new drug classes to treat different disorders. Indeed, the transient receptor potential (TRP) proteins are targets for several natural compounds, and antagonists of TRPs have been synthesised based on the knowledge of naturally derived products. In this context, this chapter focuses on naturally derived compounds (from plants and animals) that are reported to be able to modulate TRP channels. To clarify and make the understanding of the modulatory effects of natural compounds on TRPs easier, this chapter is divided into groups according to TRP subfamilies: TRPV (TRP vanilloid), TRPA (TRP ankyrin), TRPM (TRP melastatin), TRPC (TRP canonical) and TRPP (TRP polycystin). A general overview on the naturally derived compounds that modulate TRPs is depicted in Table 1.
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Affiliation(s)
- Flavia Carla Meotti
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, 05508-000, São Paulo, SP, Brazil
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24
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Beltrán LR, Dawid C, Beltrán M, Gisselmann G, Degenhardt K, Mathie K, Hofmann T, Hatt H. The pungent substances piperine, capsaicin, 6-gingerol and polygodial inhibit the human two-pore domain potassium channels TASK-1, TASK-3 and TRESK. Front Pharmacol 2013; 4:141. [PMID: 24302912 PMCID: PMC3831292 DOI: 10.3389/fphar.2013.00141] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Accepted: 10/23/2013] [Indexed: 01/26/2023] Open
Abstract
For a long time, the focus of trigeminal chemoperception has rested almost exclusively on TRP channels. However, two-pore domain (K2P) potassium channels have recently been identified as targets for substances associated with typical trigeminal sensations, such as numbing and tingling. In addition, they have been shown to be modulated by several TRP agonists. We investigated whether the pungent substances piperine, capsaicin, 6-gingerol and polygodial have an effect on human K2P channels. For this purpose, we evaluated the effects of these pungent substances on both wild-type and mutant K2P channels by means of two-electrode voltage-clamp experiments using Xenopus laevis oocytes. All four pungent substances were found to inhibit the basal activity of TASK-1 (K2P 3.1), TASK-3 (K2P 9.1), and TRESK (K2P 18.1) channels. This inhibitory effect was dose-dependent and, with the exception of polygodial on TASK-1, fully reversible. However, only piperine exhibited an IC50 similar to its reported EC50 on TRP channels. Finally, we observed for TASK-3 that mutating H98 to E markedly decreased the inhibition induced by piperine, capsaicin, and 6-gingerol, but not by polygodial. Our data contribute to the relatively sparse knowledge concerning the pharmacology of K2P channels and also raise the question of whether K2P channels could be involved in the pungency perception of piperine.
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Holzer P. Transient receptor potential (TRP) channels as drug targets for diseases of the digestive system. Pharmacol Ther 2011; 131:142-70. [PMID: 21420431 PMCID: PMC3107431 DOI: 10.1016/j.pharmthera.2011.03.006] [Citation(s) in RCA: 172] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Accepted: 03/01/2011] [Indexed: 12/12/2022]
Abstract
Approximately 20 of the 30 mammalian transient receptor potential (TRP) channel subunits are expressed by specific neurons and cells within the alimentary canal. They subserve important roles in taste, chemesthesis, mechanosensation, pain and hyperalgesia and contribute to the regulation of gastrointestinal motility, absorptive and secretory processes, blood flow, and mucosal homeostasis. In a cellular perspective, TRP channels operate either as primary detectors of chemical and physical stimuli, as secondary transducers of ionotropic or metabotropic receptors, or as ion transport channels. The polymodal sensory function of TRPA1, TRPM5, TRPM8, TRPP2, TRPV1, TRPV3 and TRPV4 enables the digestive system to survey its physical and chemical environment, which is relevant to all processes of digestion. TRPV5 and TRPV6 as well as TRPM6 and TRPM7 contribute to the absorption of Ca²⁺ and Mg²⁺, respectively. TRPM7 participates in intestinal pacemaker activity, and TRPC4 transduces muscarinic acetylcholine receptor activation to smooth muscle contraction. Changes in TRP channel expression or function are associated with a variety of diseases/disorders of the digestive system, notably gastro-esophageal reflux disease, inflammatory bowel disease, pain and hyperalgesia in heartburn, functional dyspepsia and irritable bowel syndrome, cholera, hypomagnesemia with secondary hypocalcemia, infantile hypertrophic pyloric stenosis, esophageal, gastrointestinal and pancreatic cancer, and polycystic liver disease. These implications identify TRP channels as promising drug targets for the management of a number of gastrointestinal pathologies. As a result, major efforts are put into the development of selective TRP channel agonists and antagonists and the assessment of their therapeutic potential.
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Affiliation(s)
- Peter Holzer
- Research Unit of Translational Neurogastroenterology, Institute of Experimental and Clinical Pharmacology, Medical University of Graz, Universitätsplatz 4, A-8010 Graz, Austria.
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Anti-leishmanial and anti-trypanosomal potential of polygodial isolated from stem barks of Drimys brasiliensis Miers (Winteraceae). Parasitol Res 2011; 109:231-6. [PMID: 21243506 DOI: 10.1007/s00436-010-2229-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Accepted: 12/15/2010] [Indexed: 10/18/2022]
Abstract
Parasitic protozoan diseases affect the poorest population in developing countries. Leishmaniasis and Chagas disease have been included among the most important threats for public health in Central and South American continent, with few therapeutic alternatives and highly toxic drugs. In the course of selection of novel drug candidates, we studied the anti-protozoal potential of Drimys brasiliensis. Thus, the crude hexane extract from stem bark as well as its main derivative, the sesquiterpene polygodial, were tested using in vitro assays. The crude hexane extract and polygodial showed activity against Leishmania spp. in the range between 22 and 62 μg/mL, but polygodial demonstrated high parasite selectivity towards Trypanosoma cruzi trypomastigotes (2 μg/mL), with a selectivity index of 19. Finally, polygodial showed a leishmanicidal effect, inducing intense ultrastructural damages in Leishmania in short-time incubation. The obtained results suggested that polygodial could be used as a tool for drug design studies against protozoan diseases and as a candidate molecule for further in vivo studies against T. cruzi.
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Abstract
Natural product ligands have contributed significantly to the deorphanisation of TRP ion channels. Furthermore, natural product ligands continue to provide valuable leads for the identification of ligands acting at "orphan" TRP channels. Additional naturally occurring modulators at TRP channels can be expected to be discovered in future, aiding in our understanding of not only their pharmacology and physiology, but also the therapeutic potential of this fascinating family of ion channels.
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Vriens J, Nilius B, Vennekens R. Herbal compounds and toxins modulating TRP channels. Curr Neuropharmacol 2010; 6:79-96. [PMID: 19305789 PMCID: PMC2645550 DOI: 10.2174/157015908783769644] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2007] [Revised: 07/19/2007] [Accepted: 08/15/2007] [Indexed: 01/13/2023] Open
Abstract
Although the benefits are sometimes obvious, traditional or herbal medicine is regarded with skepticism, because the mechanism through which plant compounds exert their powers are largely elusive. Recent studies have shown however that many of these plant compounds interact with specific ion channels and thereby modulate the sensing mechanism of the human body. Especially members of the Transient Receptor Potential (TRP) channels have drawn large attention lately as the receptors for plant-derived compounds such as capsaicin and menthol. TRP channels constitute a large and diverse family of channel proteins that can serve as versatile sensors that allow individual cells and entire organisms to detect changes in their environment. For this family, a striking number of empirical views have turned into mechanism-based actions of natural compounds. In this review we will give an overview of herbal compounds and toxins, which modulate TRP channels.
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Affiliation(s)
- Joris Vriens
- Laboratory of Ion Channel Research, Department of Mol. Cell Biology, Division of Physiology, Campus Gasthuisberg, KU Leuven, Herestraat 49, B-3000 LEUVEN, Belgium
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Iwasaki Y, Tanabe M, Kayama Y, Abe M, Kashio M, Koizumi K, Okumura Y, Morimitsu Y, Tominaga M, Ozawa Y, Watanabe T. Miogadial and miogatrial with α,β-unsaturated 1,4-dialdehyde moieties—Novel and potent TRPA1 agonists. Life Sci 2009; 85:60-9. [DOI: 10.1016/j.lfs.2009.04.017] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2008] [Revised: 02/12/2009] [Accepted: 04/28/2009] [Indexed: 10/20/2022]
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Abstract
Background: Traditional and current opioid pharmacology is fundamentally based on interactions between opioid receptors and compounds isolated from natural sources. Adverse effects associated with opioids have led to the search for compounds with diminished side effects. Discussion: Recent discoveries of non-nitrogenous and structurally diverse alkaloids as novel opioid ligands have led to renewed interest in the development of novel chemotypes for opioid receptors. Conclusion: The strong history of natural products as opioid receptor ligands suggests that nature is one of the most promising for the identification of novel opioids. This review highlights the vast potential of investigating natural products as novel probes of opioid receptors.
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Escalera J, von Hehn CA, Bessac BF, Sivula M, Jordt SE. TRPA1 mediates the noxious effects of natural sesquiterpene deterrents. J Biol Chem 2008; 283:24136-44. [PMID: 18550530 PMCID: PMC2527119 DOI: 10.1074/jbc.m710280200] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2007] [Revised: 05/20/2008] [Indexed: 11/06/2022] Open
Abstract
Plants, fungi, and animals generate a diverse array of deterrent natural products that induce avoidance behavior in biological adversaries. The largest known chemical family of deterrents are terpenes characterized by reactive alpha,beta-unsaturated dialdehyde moieties, including the drimane sesquiterpenes and other terpene species. Deterrent sesquiterpenes are potent activators of mammalian peripheral chemosensory neurons, causing pain and neurogenic inflammation. Despite their wide-spread synthesis and medicinal use as desensitizing analgesics, their molecular targets remain unknown. Here we show that isovelleral, a noxious fungal sesquiterpene, excites sensory neurons through activation of TPRA1, an ion channel involved in inflammatory pain signaling. TRPA1 is also activated by polygodial, a drimane sesquiterpene synthesized by plants and animals. TRPA1-deficient mice show greatly reduced nocifensive behavior in response to isovelleral, indicating that TRPA1 is the major receptor for deterrent sesquiterpenes in vivo. Isovelleral and polygodial represent the first fungal and animal small molecule agonists of nociceptive transient receptor potential channels.
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Affiliation(s)
| | | | | | | | - Sven-Eric Jordt
- Department of Pharmacology, Yale University School of Medicine, New
Haven, Connecticut 06520
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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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Della Monica C, De Petrocellis L, Di Marzo V, Landi R, Izzo I, Spinella A. Enantioselective synthesis and vanilloid activity evaluation of 1-beta-(p-methoxycinnamoyl)polygodial, an antinociceptive compound from Drymis winteri barks. Bioorg Med Chem Lett 2007; 17:6444-7. [PMID: 17951058 DOI: 10.1016/j.bmcl.2007.10.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2007] [Revised: 09/28/2007] [Accepted: 10/01/2007] [Indexed: 11/17/2022]
Abstract
A simple strategy is outlined for preparation of the antinociceptive 1-beta-(p-methoxycinnamoyl)polygodial, isolated from Drymis winteri barks. The synthesized compound showed vanilloid activity.
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Affiliation(s)
- Carmela Della Monica
- Dipartimento di Chimica, Università di Salerno, Via Ponte Don Melillo, 84084 Fisciano, Salerno, Italy
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Andrade EL, Ferreira J, André E, Calixto JB. Contractile mechanisms coupled to TRPA1 receptor activation in rat urinary bladder. Biochem Pharmacol 2006; 72:104-14. [PMID: 16725114 DOI: 10.1016/j.bcp.2006.04.003] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2006] [Revised: 04/06/2006] [Accepted: 04/07/2006] [Indexed: 12/12/2022]
Abstract
TRPA1 is a member of the transient receptor potential (TRP) channel family present in sensory neurons. Here we show that vanilloid receptor (TRPV1) stimulation with capsaicin and activation of TRPA1 with allyl isothiocyanate or cinnamaldehyde cause a graded contraction of the rat urinary bladder in vitro. Repeated applications of maximal concentrations of the agonists produce desensitization to their contractile effects. Moreover, contraction caused by TRPA1 agonists generates cross-desensitization with capsaicin. The TRP receptor antagonist ruthenium red (10-100 microM) inhibits capsaicin (0.03 microM), allyl isothiocyanate (100 microM) and cinnamaldehyde (300 microM)-induced contractions in the rat urinary bladder. The selective TRPV1 receptor antagonist SB 366791 (10 microM) blocks capsaicin-induced contraction, but partially reduces allyl isothiocyanate- or cinnamaldehyde-mediated contraction. However, allyl isothiocyanate and cinnamaldehyde (10-1000 microM) completely fail to interfere with the specific binding sites for the TRPV1 agonist [(3)H]-resiniferatoxin. Allyl isothiocyanate or cinnamaldehyde-mediated contractions of rat urinary bladder, which rely on external Ca(2+) influx, are significantly inhibited by tachykinin receptor antagonists as well as by tetrodotoxin (1 microM) or indomethacin (1 microM). Allyl isothiocyanate-induced contraction is not changed by atropine (1 microM) or suramin (300 microM). The exposure of urinary bladders to allyl isothiocyanate (100 microM) causes an increase in the prostaglandin E(2) and substance P levels. Taken together, these results indicate that TRPA1 agonists contract rat urinary bladder through sensory fibre stimulation, depending on extracellular Ca(2+) influx and release of tachykinins and cyclooxygenase metabolites, probably prostaglandin E(2). Thus, TRPA1 appears to exert an important role in urinary bladder function.
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Affiliation(s)
- Edinéia Lemos Andrade
- Department of Pharmacology, Federal University of Santa Catarina, CCB, Campus Universitário Trindade, 88049-900 Florianópolis, SC, Brazil
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