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Vergoten G, Bailly C. Molecular docking study of britannin binding to PD-L1 and related anticancer pseudoguaianolide sesquiterpene lactones. J Recept Signal Transduct Res 2021; 42:454-461. [PMID: 34789056 DOI: 10.1080/10799893.2021.2003816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The pseudoguaianolide-type sesquiterpene lactone (SL) britannin (BRT), found in different Inula species, has been characterized as a potent anticancer agent acting via modulation of the transcription factor NFkB and the Nrf2-Keap1 signaling pathway. In addition, a BRT-induced down-regulation of the immune checkpoint PD-L1 (programmed cell death ligand 1) expressed on cancer cells has been evidenced. Here we have performed a docking analysis of the direct binding of BRT to the PD-L1 protein, both in its monomeric and dimeric state. BRT appears to form stable complexes with PD-L1, with a preference for the dimeric form, binding at the interface of the two monomers. The calculated empirical energy of interaction (ΔE) value reaches -63.1 kcal/mol for the BRT-PD-L1 dimer complex, not far from the value calculated with the reference PD-L1 ligand BMS-202 (ΔE = -73.4 kcal/mol) under identical conditions. We also studied the potential PD-L1 dimer binding of 15 pseudoguaianolide sesquiterpene lactones analogues to BRT, including helenalin, gaillardin, bigelovin, coronopilin, and others. The docking analysis predicted that the SL chamissonolide (CHM) can also form equally stable complexes with PD-L1 dimer (ΔE = -64.8 kcal/mol). Preliminary compound structure-PD-L1 binding relationships have been delineated. This computational study supports the proposed interaction of BRT with PD-L1 and provides a guidance to the design of novel PD-L1 binders incorporating a SL-like tricyclic core unit.
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Affiliation(s)
- Gérard Vergoten
- University of Lille, Inserm, INFINITE - U1286, Institut de Chimie Pharmaceutique Albert Lespagnol (ICPAL), Faculté de Pharmacie, Lille, France
| | - Christian Bailly
- OncoWitan, Scientific Consulting Office, Lille (Wasquehal), France
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Anticancer Targets and Signaling Pathways Activated by Britannin and Related Pseudoguaianolide Sesquiterpene Lactones. Biomedicines 2021; 9:biomedicines9101325. [PMID: 34680439 PMCID: PMC8533303 DOI: 10.3390/biomedicines9101325] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 09/15/2021] [Accepted: 09/23/2021] [Indexed: 12/15/2022] Open
Abstract
Sesquiterpene lactones (SLs) are abundant in plants and display a large spectrum of bioactivities. The compound britannin (BRT), found in different Inula species, is a pseudoguaianolide-type SL equipped with a typical and highly reactive α-methylene-γ-lactone moiety. The bioproperties of BRT and related pseudoguaianolide SLs, including helenalin, gaillardin, bigelovin and others, have been reviewed. Marked anticancer activities of BRT have been evidenced in vitro and in vivo with different tumor models. Three main mechanisms are implicated: (i) interference with the NFκB/ROS pathway, a mechanism common to many other SL monomers and dimers; (ii) blockade of the Keap1-Nrf2 pathway, with a covalent binding to a cysteine residue of Keap1 via the reactive α-methylene unit of BRT; (iii) a modulation of the c-Myc/HIF-1α signaling axis leading to a downregulation of the PD-1/PD-L1 immune checkpoint and activation of cytotoxic T lymphocytes. The non-specific reactivity of the α-methylene-γ-lactone moiety with the sulfhydryl groups of proteins is discussed. Options to reduce or abolish this reactivity have been proposed. Emphasis is placed on the capacity of BRT to modulate the tumor microenvironment and the immune-modulatory action of the natural product. The present review recapitulates the anticancer effects of BRT, some central concerns with SLs and discusses the implication of the PD1/PD-L1 checkpoint in its antitumor action.
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Kriplani P, Guarve K. Recent Patents on Anti-Cancer Potential of Helenalin. Recent Pat Anticancer Drug Discov 2021; 15:132-142. [PMID: 32614752 DOI: 10.2174/1574892815666200702142601] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 05/08/2020] [Accepted: 05/15/2020] [Indexed: 12/21/2022]
Abstract
BACKGROUND Arnica montana, containing helenalin as its principal active constituent, is the most widely used plant to treat various ailments. Recent studies indicate that Arnica and helenalin provide significant health benefits, including anti-inflammatory, neuroprotective, antioxidant, cholesterol-lowering, immunomodulatory, and most important, anti-cancer properties. OBJECTIVE The objective of the present study is to overview the recent patents of Arnica and its principal constituent helenalin, including new methods of isolation, and their use in the prevention of cancer and other ailments. METHODS Current prose and patents emphasizing the anti-cancer potential of helenalin and Arnica, incorporated as anti-inflammary agents in anti-cancer preparations, have been identified and reviewed with particular emphasis on their scientific impact and novelty. RESULTS Helenalin has shown its anti-cancer potential to treat multiple types of tumors, both in vitro and in vivo. It has also portrayed synergistic effects when given in combination with other anti- cancer drugs or natural compounds. New purification/isolation techniques are also developing with novel helenalin formulations and its synthetic derivatives have been developed to increase its solubility and bioavailability. CONCLUSION The promising anti-cancer potential of helenalin in various preclinical studies may open new avenues for therapeutic interventions in different tumors. Thus clinical trials validating its tumor suppressing and chemopreventive activities, particularly in conjunction with standard therapies, are immediately required.
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Affiliation(s)
- Priyanka Kriplani
- Department of Pharmaceutical Sciences, Guru Gobind Singh College of Pharmacy, Yamuna Nagar 135001, Haryana, India
| | - Kumar Guarve
- Department of Pharmaceutical Sciences, Guru Gobind Singh College of Pharmacy, Yamuna Nagar 135001, Haryana, India
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4
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Matos MS, Anastácio JD, Nunes dos Santos C. Sesquiterpene Lactones: Promising Natural Compounds to Fight Inflammation. Pharmaceutics 2021; 13:pharmaceutics13070991. [PMID: 34208907 PMCID: PMC8309091 DOI: 10.3390/pharmaceutics13070991] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/18/2021] [Accepted: 06/22/2021] [Indexed: 12/14/2022] Open
Abstract
Inflammation is a crucial and complex process that reestablishes the physiological state after a noxious stimulus. In pathological conditions the inflammatory state may persist, leading to chronic inflammation and causing tissue damage. Sesquiterpene lactones (SLs) are composed of a large and diverse group of highly bioactive plant secondary metabolites, characterized by a 15-carbon backbone structure. In recent years, the interest in SLs has risen due to their vast array of biological activities beneficial for human health. The anti-inflammatory potential of these compounds results from their ability to target and inhibit various key pro-inflammatory molecules enrolled in diverse inflammatory pathways, and prevent or reduce the inflammatory damage on tissues. Research on the anti-inflammatory mechanisms of SLs has thrived over the last years, and numerous compounds from diverse plants have been studied, using in silico, in vitro, and in vivo assays. Besides their anti-inflammatory potential, their cytotoxicity, structure–activity relationships, and pharmacokinetics have been investigated. This review aims to gather the most relevant results and insights concerning the anti-inflammatory potential of SL-rich extracts and pure SLs, focusing on their effects in different inflammatory pathways and on different molecular players.
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Affiliation(s)
- Melanie S. Matos
- Instituto de Biologia Experimental e Tecnológica (iBET), Apartado 12, 2781-901 Oeiras, Portugal; (M.S.M.); (J.D.A.)
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - José D. Anastácio
- Instituto de Biologia Experimental e Tecnológica (iBET), Apartado 12, 2781-901 Oeiras, Portugal; (M.S.M.); (J.D.A.)
- CEDOC, Chronic Diseases Research Centre, NOVA Medical School, Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Campo dos Mártires da Pátria, 130, 1169-056 Lisboa, Portugal
| | - Cláudia Nunes dos Santos
- Instituto de Biologia Experimental e Tecnológica (iBET), Apartado 12, 2781-901 Oeiras, Portugal; (M.S.M.); (J.D.A.)
- CEDOC, Chronic Diseases Research Centre, NOVA Medical School, Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Campo dos Mártires da Pátria, 130, 1169-056 Lisboa, Portugal
- Correspondence:
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Emmetiere F, Ratnayake R, Schares HAM, Jones KFM, Bevan-Smith E, Luesch H, Harki DA, Grenning AJ. Function-Oriented and Modular (+/-)-cis-Pseudoguaianolide Synthesis: Discovery of New Nrf2 Activators and NF-κB Inhibitors. Chemistry 2021; 27:5564-5571. [PMID: 33502811 DOI: 10.1002/chem.202100038] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 01/21/2021] [Indexed: 12/26/2022]
Abstract
Described herein is a function-oriented synthesis route and biological evaluation of pseudoguaianolide analogues. The 10-step synthetic route developed retains the topological complexity of the natural product, installs functional handles for late-stage diversification, and forges the key bioactive Michael acceptors early in the synthesis. The analogues were found to be low-micromolar Nrf2 activators and micromolar NF-κB inhibitors and dependent on the local environment of the Michael acceptor moieties.
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Affiliation(s)
- Fabien Emmetiere
- Department of Chemistry, University of Florida, PO Box 117200, Gainesville, FL, 32608, USA
| | - Ranjala Ratnayake
- Department of Medicinal Chemistry and Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL, 32610, USA
| | - Henry A M Schares
- Department of Medicinal Chemistry, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Katherine F M Jones
- Department of Chemistry, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Emily Bevan-Smith
- Department of Chemistry, University of Florida, PO Box 117200, Gainesville, FL, 32608, USA
| | - Hendrik Luesch
- Department of Medicinal Chemistry and Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL, 32610, USA
| | - Daniel A Harki
- Department of Medicinal Chemistry, University of Minnesota, Minneapolis, MN, 55455, USA.,Department of Chemistry, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Alexander J Grenning
- Department of Chemistry, University of Florida, PO Box 117200, Gainesville, FL, 32608, USA
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Matos MS, Anastácio JD, Allwood JW, Carregosa D, Marques D, Sungurtas J, McDougall GJ, Menezes R, Matias AA, Stewart D, dos Santos CN. Assessing the Intestinal Permeability and Anti-Inflammatory Potential of Sesquiterpene Lactones from Chicory. Nutrients 2020; 12:E3547. [PMID: 33228214 PMCID: PMC7699524 DOI: 10.3390/nu12113547] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 11/12/2020] [Accepted: 11/16/2020] [Indexed: 12/16/2022] Open
Abstract
Cichorium intybus L. has recently gained major attention due to large quantities of health-promoting compounds in its roots, such as inulin and sesquiterpene lactones (SLs). Chicory is the main dietary source of SLs, which have underexplored bioactive potential. In this study, we assessed the capacity of SLs to permeate the intestinal barrier to become physiologically available, using in silico predictions and in vitro studies with the well-established cell model of the human intestinal mucosa (differentiated Caco-2 cells). The potential of SLs to modulate inflammatory responses through modulation of the nuclear factor of activated T-cells (NFAT) pathway was also evaluated, using a yeast reporter system. Lactucopicrin was revealed as the most permeable chicory SL in the intestinal barrier model, but it had low anti-inflammatory potential. The SL with the highest anti-inflammatory potential was 11β,13-dihydrolactucin, which inhibited up to 54% of Calcineurin-responsive zinc finger (Crz1) activation, concomitantly with the impairment of the nuclear accumulation of Crz1, the yeast orthologue of human NFAT.
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Affiliation(s)
- Melanie S. Matos
- Instituto de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal; (M.S.M.); (J.D.A.); (D.C.); (R.M.); (A.A.M.)
| | - José D. Anastácio
- Instituto de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal; (M.S.M.); (J.D.A.); (D.C.); (R.M.); (A.A.M.)
- CEDOC, Chronic Diseases Research Centre, NOVA Medical School, Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Campo dos Mártires da Pátria, 130, 1169-056 Lisboa, Portugal;
| | - J. William Allwood
- Plant Biochemistry and Food Quality Group, Environmental and Biochemical Sciences, The James Hutton Institute, Dundee DD2 5DA, UK; (J.W.A.); (J.S.); (G.J.M.); (D.S.)
| | - Diogo Carregosa
- Instituto de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal; (M.S.M.); (J.D.A.); (D.C.); (R.M.); (A.A.M.)
- CEDOC, Chronic Diseases Research Centre, NOVA Medical School, Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Campo dos Mártires da Pátria, 130, 1169-056 Lisboa, Portugal;
| | - Daniela Marques
- CEDOC, Chronic Diseases Research Centre, NOVA Medical School, Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Campo dos Mártires da Pátria, 130, 1169-056 Lisboa, Portugal;
| | - Julie Sungurtas
- Plant Biochemistry and Food Quality Group, Environmental and Biochemical Sciences, The James Hutton Institute, Dundee DD2 5DA, UK; (J.W.A.); (J.S.); (G.J.M.); (D.S.)
| | - Gordon J. McDougall
- Plant Biochemistry and Food Quality Group, Environmental and Biochemical Sciences, The James Hutton Institute, Dundee DD2 5DA, UK; (J.W.A.); (J.S.); (G.J.M.); (D.S.)
| | - Regina Menezes
- Instituto de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal; (M.S.M.); (J.D.A.); (D.C.); (R.M.); (A.A.M.)
- CEDOC, Chronic Diseases Research Centre, NOVA Medical School, Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Campo dos Mártires da Pátria, 130, 1169-056 Lisboa, Portugal;
| | - Ana A. Matias
- Instituto de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal; (M.S.M.); (J.D.A.); (D.C.); (R.M.); (A.A.M.)
| | - Derek Stewart
- Plant Biochemistry and Food Quality Group, Environmental and Biochemical Sciences, The James Hutton Institute, Dundee DD2 5DA, UK; (J.W.A.); (J.S.); (G.J.M.); (D.S.)
| | - Cláudia Nunes dos Santos
- Instituto de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal; (M.S.M.); (J.D.A.); (D.C.); (R.M.); (A.A.M.)
- CEDOC, Chronic Diseases Research Centre, NOVA Medical School, Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Campo dos Mártires da Pátria, 130, 1169-056 Lisboa, Portugal;
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Zhang S, Jia Q, Gao Q, Fan X, Weng Y, Su Z. Dual-Specificity Phosphatase CDC25B Was Inhibited by Natural Product HB-21 Through Covalently Binding to the Active Site. Front Chem 2018; 6:531. [PMID: 30555816 PMCID: PMC6282036 DOI: 10.3389/fchem.2018.00531] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 10/12/2018] [Indexed: 12/14/2022] Open
Abstract
Cysteine 473, within the active site of the enzyme, Cdc25B, is catalytically essential for substrate activation. The most well-reported inhibitors of Cdc25 phosphatases, especially quinone-type inhibitors, function by inducing irreversible oxidation at this active site of cysteine. Here, we identified a natural product, HB-21, having a sesquiterpene lactone skeleton that could irreversibly bind to cys473 through the formation of a covalent bond. This compound inhibited recombinant human Cdc25B phosphatase with an IC50 value of 24.25 μM. Molecular modeling predicted that HB-21 not only covalently binds to cys473 of Cdc25B but also forms six hydrogen bonds with residues at the active site. Moreover, HB-21 can dephosphorylate cyclin-dependent kinase (CDK1), the natural substrate of Cdc25b, and inhibit cell cycle progression. In summary, HB-21 is a new type of Cdc25B inhibitor with a novel molecular mechanism.
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Affiliation(s)
- Shoude Zhang
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China.,Department of Pharmacy, Medical College of Qinghai University, Xining, China.,School of Pharmacy, East China University of Science and Technology, Shanghai, China
| | - Qiangqiang Jia
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Qiang Gao
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Xueru Fan
- Department of Pharmacy, Medical College of Qinghai University, Xining, China
| | - Yuxin Weng
- Department of Pharmacy, Medical College of Qinghai University, Xining, China
| | - Zhanhai Su
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China.,Department of Pharmacy, Medical College of Qinghai University, Xining, China
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Grienke U, Radić Brkanac S, Vujčić V, Urban E, Ivanković S, Stojković R, Rollinger JM, Kralj J, Brozovic A, Radić Stojković M. Biological Activity of Flavonoids and Rare Sesquiterpene Lactones Isolated From Centaurea ragusina L. Front Pharmacol 2018; 9:972. [PMID: 30190676 PMCID: PMC6117149 DOI: 10.3389/fphar.2018.00972] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Accepted: 08/06/2018] [Indexed: 01/28/2023] Open
Abstract
The endemic Croatian species Centaurea ragusina L., like other species from the genus Centaurea, has been traditionally used in Croatia as an antibacterial agent and for the treatment of gastrointestinal and urogenital disorders. In several chromatographic steps, three flavonoids and three sesquiterpene lactones (STLs) were isolated and identified from the most active fractions of the ethanol extract. Two STLs, one for which we created the trivial name ragusinin, and hemistepsin A are here reported for the first time as constituents of the genus Centaurea. All six compounds were screened for their effect on several tumor and one normal cell lines. Among them, ragusinin showed the best bioactivity and high specificity to affect tumor murine SCCVII, human HeLa and Caco-2 cell lines, but not the viability of normal V79 fibroblasts. Due to these characteristics the action of ragusinin was investigated in more detail. Since DNA is the primary target for many drugs with antibacterial and anticancer activity, we studied its interaction with ragusinin. Rather moderate binding affinity to DNA excluded it as the primary target of ragusinin. Due to the possibility of STL interaction with glutathione (GSH), the ubiquitous peptide that traps reactive compounds and other xenobiotics to prevent damage to vital proteins and nucleic acids, its role in deactivation of ragusinin was evaluated. Addition of the GSH precursor N-acetyl-cysteine potentiated the viability of HeLa cells, while the addition of GSH inhibitor L-buthionine sulfoximine decreased it. Moreover, pre-treatment of HeLa cells with the inhibitor of glutathione-S-transferase decreased their viability indicating the detoxifying role of GSH in ragusinin treated cells. Cell death, derived by an accumulation of cells in a G2 phase of the cell cylce, was shown to be independent of poly (ADP-ribose) polymerase and caspase-3 cleavage pointing toward an alternative cell death pathway.
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Affiliation(s)
- Ulrike Grienke
- Department of Pharmacognosy, University of Vienna, Vienna, Austria
| | - Sandra Radić Brkanac
- Department of Biology, Faculty of Science, University of Zagreb, Zagreb, Croatia
| | - Valerija Vujčić
- Department of Biology, Faculty of Science, University of Zagreb, Zagreb, Croatia
| | - Ernst Urban
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Siniša Ivanković
- Division of Molecular Medicine, Ruđer Bošković Institute, Zagreb, Croatia
| | - Ranko Stojković
- Division of Molecular Medicine, Ruđer Bošković Institute, Zagreb, Croatia
| | | | - Juran Kralj
- Division of Molecular Biology, Ruđer Bošković Institute, Zagreb, Croatia
| | - Anamaria Brozovic
- Division of Molecular Biology, Ruđer Bošković Institute, Zagreb, Croatia
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9
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Bias and misleading concepts in an Arnica research study. Comments to improve experimental Homeopathy. J Ayurveda Integr Med 2018; 9:75-80. [PMID: 29496319 PMCID: PMC5884037 DOI: 10.1016/j.jaim.2017.01.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 01/23/2017] [Accepted: 01/30/2017] [Indexed: 01/01/2023] Open
Abstract
Basic experimental models in Homeopathy are of major interest because they could get insightful data about the ability of high dilutions to work in a biological system. Due to the extreme difficulty in the highlighting any possible effect and trusting its reliability, methods should be particularly stringent and highly standardized. Confounders, handling process, pre-analytical errors, misleading statistics and misinterpretations may lead to experimental biases. This article tries to elucidate those factors causing bias, taking into account some recent reported evidence in the field.
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Laurella LC, Cerny N, Bivona AE, Sánchez Alberti A, Giberti G, Malchiodi EL, Martino VS, Catalan CA, Alonso MR, Cazorla SI, Sülsen VP. Assessment of sesquiterpene lactones isolated from Mikania plants species for their potential efficacy against Trypanosoma cruzi and Leishmania sp. PLoS Negl Trop Dis 2017; 11:e0005929. [PMID: 28945741 PMCID: PMC5629014 DOI: 10.1371/journal.pntd.0005929] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 10/05/2017] [Accepted: 09/04/2017] [Indexed: 12/16/2022] Open
Abstract
Four sesquiterpene lactones, mikanolide, deoxymikanolide, dihydromikanolide and scandenolide, were isolated by a bioassay-guided fractionation of Mikania variifolia and Mikania micrantha dichloromethane extracts. Mikanolide and deoxymikanolide were the major compounds in both extracts (2.2% and 0.4% for Mikania variifolia and 21.0% and 6.4% for Mikania micrantha respectively, calculated on extract dry weight). Mikanolide, deoxymikanolide and dihydromikanolide were active against Trypanosoma cruzi epimastigotes (50% inhibitory concentrations of 0.7, 0.08 and 2.5 μg/mL, for each compound respectively). These sesquiterpene lactones were also active against the bloodstream trypomastigotes (50% inhibitory concentrations for each compound were 2.1, 1.5 and 0.3 μg/mL, respectively) and against amastigotes (50% inhibitory concentrations for each compound were 4.5, 6.3 and 8.5 μg/mL, respectively). By contrast, scandenolide was not active on Trypanosoma cruzi. Besides, mikanolide and deoxymikanolide were also active on Leishmania braziliensis promastigotes (50% inhibitory concentrations of 5.1 and 11.5 μg/mL, respectively). The four sesquiterpene lactones were tested for their cytotoxicity on THP 1 cells. Deoxymikanolide presented the highest selectivity index for trypomastigotes (SI = 54) and amastigotes (SI = 12.5). In an in vivo model of Trypanosoma cruzi infection, deoxymikanolide was able to decrease the parasitemia and the weight loss associated to the acute phase of the parasite infection. More importantly, while 100% of control mice died by day 22 after receiving a lethal T. cruzi infection, 70% of deoxymikanolide-treated mice survived. We also observed that this compound increased TNF-α and IL-12 production by macrophages, which could contribute to control T. cruzi infection.
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Affiliation(s)
- Laura C. Laurella
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Farmacognosia, Buenos Aires, Argentina
| | - Natacha Cerny
- CONICET—Universidad Nacional de Luján, Instituto de Ecología y Desarrollo Sustentable (INEDES), Luján, Argentina
| | - Augusto E. Bivona
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Inmunología, Buenos Aires, Argentina, Instituto de Estudios de la Inmunidad Humoral (IDEHU), UBA-CONICET, Buenos Aires, Argentina
- CONICET- Universidad de Buenos Aires, Instituto de Microbiología y Parasitología Médica—CONICET (IMPaM), Facultad de Medicina, Piso 13, Buenos Aires, Argentina
| | - Andrés Sánchez Alberti
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Inmunología, Buenos Aires, Argentina, Instituto de Estudios de la Inmunidad Humoral (IDEHU), UBA-CONICET, Buenos Aires, Argentina
- CONICET- Universidad de Buenos Aires, Instituto de Microbiología y Parasitología Médica—CONICET (IMPaM), Facultad de Medicina, Piso 13, Buenos Aires, Argentina
| | - Gustavo Giberti
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Farmacognosia, Buenos Aires, Argentina
- CONICET–Universidad de Buenos Aires, Instituto de Química y Metabolismo del Fármaco—CONICET (IQUIMEFA), Buenos Aires, Argentina
| | - Emilio L. Malchiodi
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Inmunología, Buenos Aires, Argentina, Instituto de Estudios de la Inmunidad Humoral (IDEHU), UBA-CONICET, Buenos Aires, Argentina
- CONICET- Universidad de Buenos Aires, Instituto de Microbiología y Parasitología Médica—CONICET (IMPaM), Facultad de Medicina, Piso 13, Buenos Aires, Argentina
| | - Virginia S. Martino
- CONICET–Universidad de Buenos Aires, Instituto de Química y Metabolismo del Fármaco—CONICET (IQUIMEFA), Buenos Aires, Argentina
| | - Cesar A. Catalan
- CONICET–Universidad Nacional de Tucumán, Instituto de Química del Noroeste—CONICET (INQUINOA), Ayacucho 471 (T4000INI), San Miguel de Tucumán, Argentina
| | - María Rosario Alonso
- CONICET–Universidad de Buenos Aires, Instituto de Química y Metabolismo del Fármaco—CONICET (IQUIMEFA), Buenos Aires, Argentina
| | - Silvia I. Cazorla
- CONICET- Universidad de Buenos Aires, Instituto de Microbiología y Parasitología Médica—CONICET (IMPaM), Facultad de Medicina, Piso 13, Buenos Aires, Argentina
- CONICET–Centro de Referencia para Lactobacilos (CERELA), Batalla de Chacabuco 145, San Miguel de Tucumán, Argentina
- * E-mail: (VPS); (SIC)
| | - Valeria P. Sülsen
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Farmacognosia, Buenos Aires, Argentina
- CONICET–Universidad de Buenos Aires, Instituto de Química y Metabolismo del Fármaco—CONICET (IQUIMEFA), Buenos Aires, Argentina
- * E-mail: (VPS); (SIC)
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11
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Dash S, Ray M, Parida R, Achary KG, Nayak S, Singh S. Edible plant-derived essential oils synergistically enhance the Th1, Th2 and anti-inflammatory cytokines in neonatal cord blood monocytic cell line. FOOD AGR IMMUNOL 2017. [DOI: 10.1080/09540105.2017.1376039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- Swagatika Dash
- Centre for Biotechnology, Siksha ‘O’ Anusandhan University, Bhubaneswar, Odisha, India
| | - Monalisa Ray
- Centre for Biotechnology, Siksha ‘O’ Anusandhan University, Bhubaneswar, Odisha, India
| | - Reena Parida
- Centre for Biotechnology, Siksha ‘O’ Anusandhan University, Bhubaneswar, Odisha, India
| | | | - Sanghamitra Nayak
- Centre for Biotechnology, Siksha ‘O’ Anusandhan University, Bhubaneswar, Odisha, India
| | - Shikha Singh
- Centre for Biotechnology, Siksha ‘O’ Anusandhan University, Bhubaneswar, Odisha, India
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12
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Flemming M, Kraus B, Rascle A, Jürgenliemk G, Fuchs S, Fürst R, Heilmann J. Revisited anti-inflammatory activity of matricine in vitro: Comparison with chamazulene. Fitoterapia 2015; 106:122-8. [PMID: 26304764 DOI: 10.1016/j.fitote.2015.08.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 08/13/2015] [Accepted: 08/17/2015] [Indexed: 12/15/2022]
Abstract
The proazulene matricine (1) is present in chamomile flower heads and has been proven to exhibit strong in vivo anti-inflammatory activity. In contrast to other secondary metabolites in chamomile preparations like its degradation product chamazulene (2), no plausible targets have been found to explain this activity. Therefore we revisited 1 regarding its in vitro anti-inflammatory activity in cellular and molecular studies. Using ICAM-1 as a marker for NF-κB activation, it was shown that ICAM-1 protein expression induced by TNF-α and LPS, but not by IFN-γ, was remarkably inhibited by 1 in endothelial cells (HMEC-1). Inhibition was concentration-dependent in a micromolar range (10-75 μM) and did not involve cytotoxic effects. At 75 μM expression of the adhesion molecule ICAM-1 was down to 52.7 ± 3.3% and 20.4 ± 1.8% of control in TNF-α and LPS-stimulated HMEC-1, respectively. In contrast, 2 showed no activity. Quantitative RT-PCR experiments revealed that TNF-α-induced expression of the ICAM-1 gene was also reduced by 1 in a concentration-dependent manner, reaching 32.3 ± 6.2% of control at 100 μM matricine. Additional functional assays (NF-κB promotor activity and cytoplasm to nucleus translocation) confirmed the inhibitory effect of 1 on NF-κB signaling. Despite the fact that 1 lacks an α,β-unsaturated carbonyl and is thus not able to act via a Michael reaction with electron rich SH groups of functional biological molecules, data gave strong evidence that 1 inhibits NF-κB transcriptional activity in endothelial cells by an hitherto unknown mechanism and this may contribute to its well-known anti-inflammatory activity in vivo.
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Affiliation(s)
- Marcel Flemming
- Institut für Pharmazie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - Birgit Kraus
- Institut für Pharmazie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - Anne Rascle
- Institut für Immunologie, Universität Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
| | - Guido Jürgenliemk
- Institut für Pharmazie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - Simone Fuchs
- Institut für Pharmazeutische Biologie, Goethe-Universität Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt am Main, Germany
| | - Robert Fürst
- Institut für Pharmazeutische Biologie, Goethe-Universität Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt am Main, Germany
| | - Jörg Heilmann
- Institut für Pharmazie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany.
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13
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Wang M, Li Q. Parthenolide could become a promising and stable drug with anti-inflammatory effects. Nat Prod Res 2014; 29:1092-101. [DOI: 10.1080/14786419.2014.981541] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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14
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Hsu BY, Kuo YC, Chen BH. Polysaccharide Isolated from Zizyphus jujuba ( Hóng Zǎo) Inhibits Interleukin-2 Production in Jurkat T Cells. J Tradit Complement Med 2014; 4:132-5. [PMID: 24860737 PMCID: PMC4003703 DOI: 10.4103/2225-4110.124360] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Zizyphus jujuba ( Hóng Zǎo), a traditional Chinese herb widely used in many Asian countries, has been shown to possess vital biological activities such as anti-cancer activity. The objective of this study was to evaluate the immunomodulatory effect of deproteinated polysaccharide (DP) isolated from Z. jujuba. The DP isolated from Z. jujuba consisted of two polysaccharide fractions and their molecular weights (MWs) were found to be 143,108 and 67,633 Da, respectively. The DP could significantly decrease interleukin (IL)-2 production in phytohemagglutinin (PHA)-activated Jurkat T cells in a dose-dependent manner after 48 h of incubation, with the inhibition being 47.5%, 61.2%, and 81.7% for DP concentrations of 0.75, 1.75, and 2.5 mg/ml, respectively. Thus, our study showed that DP isolated from Z. jujuba may possess anti-inflammatory activity as it could significantly reduce IL-2 production in activated Jurkat T cells.
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Affiliation(s)
- Bo-Yang Hsu
- Department of Food and Beverage Management, University of Kang Ning, Tainan 709, Taiwan
| | - Yuh-Chi Kuo
- Department of Life Science, Fu Jen University, Taipei 242, Taiwan
| | - Bing-Huei Chen
- Department of Food Science, Fu Jen University, Taipei 242, Taiwan
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15
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16
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ZHANG ZHIQIANG, CHOW RAYMONDKWOKKEI, ZHOU HONGWEI, LI JIELIANG, CHEUNG HONYEUNG. AN AB INITIO STUDY ON THE STRUCTURE–CYTOTOXICITY RELATIONSHIP OF TERPENOID LACTONES BASED ON THE MICHAEL REACTION BETWEEN THEIR PHARMACOPHORES AND L-CYSTEINE-METHYLESTER-1. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633608003794] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The cytotoxic effects of terpenoid lactones are attributed to the alkylation of biological nucleophiles, especially sulfhydryl groups in proteins, by the α,β-unsaturated carbonyl moiety of lactones through Michael reaction. Therefore, the cytotoxicity could be reflected by the reactivity of the pharmacophores. In this work, the Michael reaction between 12 α,β-unsaturated-carbonyl-containing small species, i.e. 10 analogues of the alpha methylene gamma butyrolactone moiety of andrographolide, one cyclopentenone, and one methylene–pentanolide, and L-cysteine-methylester-1 were investigated by ab initio methods to mimic the alkylation of proteins by terpenoid lactones. The trend in the calculated reaction free energies of the small species is qualitatively in accordance with the reported cytotoxicity of corresponding terpenoid lactones.
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Affiliation(s)
- ZHI QIANG ZHANG
- Research Group for Bioactive Products, Department of Biology and Chemistry, City University of Hong Kong, Hong Kong SAR, China
| | - RAYMOND KWOK KEI CHOW
- Research Group for Bioactive Products, Department of Biology and Chemistry, City University of Hong Kong, Hong Kong SAR, China
| | - HONG WEI ZHOU
- Research Group for Bioactive Products, Department of Biology and Chemistry, City University of Hong Kong, Hong Kong SAR, China
| | - JIE LIANG LI
- Research Group for Bioactive Products, Department of Biology and Chemistry, City University of Hong Kong, Hong Kong SAR, China
| | - HON-YEUNG CHEUNG
- Research Group for Bioactive Products, Department of Biology and Chemistry, City University of Hong Kong, Hong Kong SAR, China
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17
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Casu L, Cottiglia F, Leonti M, De Logu A, Agus E, Tse-Dinh YC, Lombardo V, Sissi C. Ungeremine effectively targets mammalian as well as bacterial type I and type II topoisomerases. Bioorg Med Chem Lett 2011; 21:7041-4. [PMID: 22014547 DOI: 10.1016/j.bmcl.2011.09.097] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Revised: 09/22/2011] [Accepted: 09/23/2011] [Indexed: 11/16/2022]
Abstract
From the methanol extract of the bulbs of Pancratium illyricum L., three phenanthridine type alkaloids, ungeremine (1), (-)-lycorine (2) and (+)-vittatine (3) were isolated. For the evaluation of their anticancer and antibacterial potential, compounds 1-3 were tested against human (I, IIα) and bacterial (IA, IV) topoisomerases. Our data demonstrated that ungeremine impairs the activity of both, human and bacterial topoisomerases. Remarkably, ungeremine was found to largely increments the DNA cleavage promoted by bacterial topoisomerase IA, a new target in antimicrobial chemotherapy.
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Affiliation(s)
- Laura Casu
- Dipartimento Farmaco Chimico Tecnologico, University of Cagliari, Cagliari, Italy
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18
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Chicca A, Tebano M, Adinolfi B, Ertugrul K, Flamini G, Nieri P. Anti-proliferative activity of aguerin B and a new rare nor-guaianolide lactone isolated from the aerial parts of Centaurea deflexa. Eur J Med Chem 2011; 46:3066-70. [DOI: 10.1016/j.ejmech.2011.03.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Revised: 01/11/2011] [Accepted: 03/05/2011] [Indexed: 11/17/2022]
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19
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Kmoníčková E, Harmatha J, Vokáč K, Kostecká P, Farghali H, Zídek Z. Sesquiterpene lactone trilobolide activates production of interferon-γ and nitric oxide. Fitoterapia 2010; 81:1213-9. [DOI: 10.1016/j.fitote.2010.08.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Revised: 08/10/2010] [Accepted: 08/12/2010] [Indexed: 10/19/2022]
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20
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Leonti M, Casu L, Gertsch J, Bonsignore L, Floris C, Casu M, Cottiglia F. A pterocarpan from the seeds of Bituminaria morisiana. J Nat Med 2010; 64:354-7. [PMID: 20238177 DOI: 10.1007/s11418-010-0408-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Accepted: 02/04/2010] [Indexed: 10/19/2022]
Abstract
A new prenylated pterocarpan, named morisianine, was isolated together with the known secondary metabolites erybraedin C, psoralen and angelicin from the seeds of Bituminaria morisiana. The structures of the compounds were elucidated mainly by 1D and 2D NMR experiments as well as mass spectrometry. The new compound was subjected to cytotoxicity screening against a panel of human cancer cells.
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Affiliation(s)
- Marco Leonti
- Dipartimento Farmaco Chimico Tecnologico, University of Cagliari, via Ospedale 72, 09124, Cagliari, Italy
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21
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Berges C, Fuchs D, Opelz G, Daniel V, Naujokat C. Helenalin suppresses essential immune functions of activated CD4+ T cells by multiple mechanisms. Mol Immunol 2009; 46:2892-901. [DOI: 10.1016/j.molimm.2009.07.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2009] [Revised: 07/01/2009] [Accepted: 07/13/2009] [Indexed: 12/31/2022]
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22
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Adams M, Berset C, Kessler M, Hamburger M. Medicinal herbs for the treatment of rheumatic disorders--a survey of European herbals from the 16th and 17th century. JOURNAL OF ETHNOPHARMACOLOGY 2009; 121:343-359. [PMID: 19063957 DOI: 10.1016/j.jep.2008.11.010] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2008] [Revised: 11/07/2008] [Accepted: 11/11/2008] [Indexed: 05/27/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE From the 16th up into the 18th century botanical and medicinal knowledge in Europe was documented and spread in magnificently illustrated herbals. For the most part modern science has neglected this source of knowledge and old remedies have not been systematically evaluated pharmacologically. AIM OF THE STUDY Rheumatic disorders and chronic inflammatory and degenerative diseases of the musculoskeletal system were chosen in an attempt to discuss remedies described in the old herbals in the viewpoint of modern science. MATERIALS AND METHODS Five of the most important European herbals of the 16th and 17th century were searched for terms related to rheumatic diseases, and plants and recipes described for their treatment. An extensive search of the scientific data banks Medline and SciFinder scholar was done to find recent results concerning the phytochemistry and possible antiphlogistic activities of the plants. RESULTS Sixty-three plants were identified in the herbals for this indication. More than half of them have shown in vitro or in vivo antiphlogistic activities. CONCLUSIONS European herbals may be a valuable source of information for the selection of plants for focussed screening programmes. Information contained in these herbals should be explored in a systematic manner.
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Affiliation(s)
- Michael Adams
- Institute of Pharmaceutical Biology, University of Basel, Klingelbergstrasse 50, CH-4056 Basel, Switzerland.
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23
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Fernandes KM, Auld CA, Hopkins RG, Morrison RF. Helenalin-mediated post-transcriptional regulation of p21(Cip1) inhibits 3T3-L1 preadipocyte proliferation. J Cell Biochem 2008; 105:913-21. [PMID: 18729080 DOI: 10.1002/jcb.21894] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
We have previously shown that post-transcriptional mechanisms involving the 26S proteasome regulate the cyclin-dependent kinase inhibitors (CKIs), p21(Cip1) and p27(Kip1) during preadipocyte proliferation. Earlier studies further demonstrated that the anti-inflammatory, anti-carcinogenic phytochemical, helenalin is a potent inhibitor of periodic Skp2 accumulation, an F-box protein mediating SCF E3 ligase ubiquitylation and degradation of both CKIs during S phase progression. Data presented here demonstrate that helenalin dose-dependently induced G1 arrest of synchronously replicating 3T3-L1 preadipocytes. This effect occurred in the absence of discernable indices of cell toxicity or apoptosis under the conditions used in this study. Our results demonstrate that helenalin markedly increased p21 protein accumulation in both density-arrested and proliferating preadipocytes in a dose-dependent manner. This increase in p21 protein abundance occurred without change in mRNA transcript demonstrating that post-transcriptional mechanisms were involved. This notion was further supported by the modest accumulation of polyubiquitylated p21 following treatment with helenalin suggesting that suppression of targeted p21 proteolysis by the 26S proteasome contributed to helenalin-mediated p21 accumulation. The increase in p21 protein was compartmentalized to the nucleus where p21 is known to inhibit cell cycle progression. Finally, helenalin increased protein-protein interactions between p21 and cyclin-dependent kinase 2 (Cdk2) which may account in part for the anti-proliferative effect in 3T3-L1 preadipocytes.
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Affiliation(s)
- Karishma M Fernandes
- Department of Nutrition, The University of North Carolina at Greensboro, Greensboro, North Carolina 27402, USA
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24
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Macías FA, García-Díaz MD, Massanet GM, Gómez-Madero JF, Fronczek FR, Galindo JC. An easy access to bioactive 13-hydroxylated and 11,13-dihydroxylated sesquiterpene lactones (SLs) through Michael addition of a nucleophilic hydroxyl group. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.09.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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Collu F, Bonsignore L, Casu M, Floris C, Gertsch J, Cottiglia F. New cytotoxic saturated and unsaturated cyclohexanones from Anthemis maritima. Bioorg Med Chem Lett 2008; 18:1559-62. [PMID: 18262418 DOI: 10.1016/j.bmcl.2008.01.078] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2008] [Revised: 01/21/2008] [Accepted: 01/22/2008] [Indexed: 11/30/2022]
Abstract
Two new cyclohexenones (antheminones A and B) and a new cyclohexanone, (antheminone C) along with five known compounds were isolated from the leaves of Anthemis maritima L. The structures were mainly deduced from extensive 1D and 2D NMR spectroscopy and mass spectrometry. The new compounds were tested in vitro for their cytotoxic activity against adherent and non-adherent cancer cell lines. Antheminones A and C exhibited significant antiproliferative activity against leukemia cells with IC(50) values ranging from 3.2 to 14 microM.
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Affiliation(s)
- Francesca Collu
- Dipartimento Farmaco Chimico Tecnologico, University of Cagliari, via Ospedale 72, 09124 Cagliari, Italy
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26
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Kaileh M, Vanden Berghe W, Boone E, Essawi T, Haegeman G. Screening of indigenous Palestinian medicinal plants for potential anti-inflammatory and cytotoxic activity. JOURNAL OF ETHNOPHARMACOLOGY 2007; 113:510-6. [PMID: 17716845 DOI: 10.1016/j.jep.2007.07.008] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2006] [Revised: 07/10/2007] [Accepted: 07/10/2007] [Indexed: 05/16/2023]
Abstract
Organic extracts of 24 selected plant species, used by Palestinian traditional healers to treat different illnesses and diseases, were tested for their anti-inflammatory and anti-tumoral activities. The plant selection was based on existing ethnobotanic information and interviews with local healers. The extracts of the plants under investigation were tested for their potential anti-tumor (cytotoxic) effect on the murine fibrosarcoma L929sA cells, and on the human breast cancer cells MDA-MB231 and MCF7. Cytotoxicity screening models provide important preliminary data to select plant extracts with potential antineoplastic properties. MTT (Tetrazolium blue) colorimetric assay was used to evaluate the reduction of viability of cell cultures in the presence or absence of the extracts. The extract from Withania somnifera, L. Dunal (Solanaceae) presented an IC(50) value at 24h of 150 and 60 microg/ml, on L929sA and MCF7 cells, respectively, while the extract from Psidium guajava L. (Myrtaceae) presented an IC(50) value at 24h of 55 microg/ml on MCF7 cells. Other extracts examined, like Laurus nobilis L. (Lauraceae) and Salvia fruticosa M. (Labiatae), also displayed a remarkable activity. Additionally, as the nuclear transcription factor NFkappaB regulates the expression of various genes that play critical roles in apoptosis and immunomodulation, we further investigated the effect of nine promising plant extracts, withheld from the first cell viability screening on NFkappaB activation. The extracts showed variable degrees of NFkappaB-inhibitory activity. Whereas Withania somnifera extract demonstrated the strongest NFkappaB-inhibitory activity, other extracts derived from Laurus nobilis, Psidium guajava and Foeniculum vulgare M. (Umbiliferrae) also revealed immunomodulatory NFkappaB activities. These species are good candidates for further activity-monitored fractionation to identify active constituents.
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Affiliation(s)
- Mary Kaileh
- Laboratory of Eukaryotic Gene Expression and Signal Transduction (LEGEST), Department of Molecular Biology, Ghent University, K.L. Ledeganckstraat 35, B-9000 Gent, Belgium
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López-Antón N, Hermann C, Murillo R, Merfort I, Wanner G, Vollmar AM, Dirsch VM. Sesquiterpene lactones induce distinct forms of cell death that modulate human monocyte-derived macrophage responses. Apoptosis 2007; 12:141-53. [PMID: 17080325 DOI: 10.1007/s10495-006-0331-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Sesquiterpene lactones (SQTLs) are shown to possess anti-inflammatory as well as cytotoxic activity. No study, however, links both activities. We, therefore, hypothesized that SQTL-treated, dying cells might induce an anti-inflammatory response in cocultured THP-1 macrophages. Here we show that SQTLs bearing either an alpha,beta-unsaturated cyclopentenone or an alpha-methylene-gamma-lactone induce different forms of cell death. Whereas the cyclopentenone SQTL induced typical apoptosis, the alpha-methylene-gamma-lactone SQTLs-induced cell death lacked partly classical signs of apoptosis, such as DNA fragmentation. All SQTLs, however, activated caspases and the nuclear morphology of cell death was dependent on caspase activation. Most interestingly, alpha-methylene-gamma-lactone SQTLs induced a more pronounced phosphatidylserine (PS) exposure than the cyclopentenone SQTL. Especially, 7-hydroxycostunolide (HC), with an alpha-methylene-gamma-lactone substituted with a hydroxyl group, showed a striking fast and pronounced PS translocation. This result was in agreement with a strong activation of phagocytosis in cocultured THP-1 macrophages. Interestingly, HC-treated Jurkat cells led to an early (3.5 h) but transient increase in TNF-alpha levels in macrophage coculture. Release of TGF-beta remained unaffected after 18 h. We propose that this type of SQTL may influence local inflammation by transiently activating the immune system and help to clear cells by inducing a form of cell death that promotes phagocytosis.
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Affiliation(s)
- Nancy López-Antón
- Department of Pharmacy, Center of Drug Research, University of Munich, Germany
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28
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Lindenmeyer MT, Kern C, Sparna T, Donauer J, Wilpert J, Schwager J, Porath D, Kreutz C, Timmer J, Merfort I. Microarray analysis reveals influence of the sesquiterpene lactone parthenolide on gene transcription profiles in human epithelial cells. Life Sci 2007; 80:1608-18. [PMID: 17343877 DOI: 10.1016/j.lfs.2007.01.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2006] [Revised: 01/16/2007] [Accepted: 01/20/2007] [Indexed: 11/25/2022]
Abstract
Sesquiterpene lactones are known for their anti-inflammatory activity which has been proven in various assays on DNA, mRNA and protein level. Here we report on the change in the gene expression profile in TNF-alpha stimulated human 293 cells after treatment with parthenolide using a cDNA microarray analysis. Twenty-one of 7028 genes were found to be up- and 18 down-regulated. They encode for chemoattractants, immune system proteins, glycoproteins, metabolism, serine proteinases, and transcription factors. Confirmatory analyses were carried out using quantitative real-time RT-PCR (TaqMan). Additional studies with selected genes revealed the concentration-dependent influence of parthenolide on the expression of these genes.
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Affiliation(s)
- M T Lindenmeyer
- Institute for Pharmaceutical Sciences, Department of Pharmaceutical Biology and Biotechnology, Albert-Ludwigs-University, Freiburg, Germany
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29
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Boulanger D, Brouillette E, Jaspar F, Malouin F, Mainil J, Bureau F, Lekeux P. Helenalin reduces Staphylococcus aureus infection in vitro and in vivo. Vet Microbiol 2006; 119:330-8. [PMID: 17010538 DOI: 10.1016/j.vetmic.2006.08.020] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2006] [Revised: 08/11/2006] [Accepted: 08/16/2006] [Indexed: 10/24/2022]
Abstract
Staphylococcus (S.) aureus is a major udder pathogen causing bovine mastitis. Some pro-inflammatory cytokines, including tumor necrosis factor-alpha (TNF-alpha), enhance extracellular and intracellular growth of S. aureus, indicating that the inflammatory process favors S. aureus infection. Helenalin is a sesquiterpene lactone with potent anti-inflammatory properties. This study was designed to evaluate the effects of helenalin on S. aureus infection. First, in vitro experiments were conducted. These studies revealed that proliferation of S. aureus in bovine mammary epithelial MAC-T cells treated in the presence or absence of TNF-alpha was markedly reduced in the presence of helenalin. Secondly, in vivo effects of helenalin were investigated. Lactating mice treated in the presence or absence of helenalin were challenged by the intramammary route with S. aureus and the bacteria in the mammary glands were counted 12 h after infection. Significantly less numbers of bacteria were recovered from the infected glands of helenalin-treated mice compared with untreated mice. Moreover, histological examination of mammary tissue from helenalin-treated mice that were challenged with S. aureus indicated that helenalin is able to significantly reduce leukocyte infiltration in the mammary gland following S. aureus inoculation. Our results show that helenalin reduces S. aureus intracellular growth and experimental S. aureus infection. We conclude that helenalin may be of potential interest in the treatment of S. aureus-induced mastitis in the bovine species.
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MESH Headings
- Animals
- Anti-Inflammatory Agents, Non-Steroidal/administration & dosage
- Anti-Inflammatory Agents, Non-Steroidal/pharmacology
- Cattle
- Cell Line
- Cells, Cultured
- Colony Count, Microbial/veterinary
- Disease Models, Animal
- Female
- Injections, Intraperitoneal
- Mammary Glands, Animal/cytology
- Mammary Glands, Animal/microbiology
- Mastitis, Bovine/microbiology
- Mastitis, Bovine/prevention & control
- Mice
- Mice, Inbred BALB C
- Microbial Sensitivity Tests/veterinary
- Sesquiterpenes/administration & dosage
- Sesquiterpenes/pharmacology
- Sesquiterpenes, Guaiane
- Staphylococcal Infections/microbiology
- Staphylococcal Infections/prevention & control
- Staphylococcal Infections/veterinary
- Staphylococcus aureus/drug effects
- Staphylococcus aureus/growth & development
- Tumor Necrosis Factor-alpha/pharmacology
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Affiliation(s)
- D Boulanger
- Department of Physiology, Faculty of Veterinary Medicine, University of Liège, 20 Boulevard de Colonster, B-4000 Liège, Belgium.
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30
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Abstract
A defect in apoptosis is almost always linked to many pathologies, including cancer. Carcinogenesis has been linked to abnormalities in the apoptotic pathway, and many drugs that are targeted at different parts of this pathway are being developed. There have been many promising drugs that target the extrinsic death receptor pathway as well as the intrinsic mitochondrial apoptotic pathway. There have also been developments in targeting initiator and effector caspases, as well as the death domains that are involved in transducing the apoptotic signals. In this review, the authors will briefly explain how apoptosis deregulation can lead to cancer and discuss drugs that promise success in targeting this anomaly. This article shall also explain how co-treatments with chemotherapy can increase survival of cancer patients. There is a problem of acquired resistance in some of these therapies but there may be ways to overcome this.
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Affiliation(s)
- Zodwa Dlamini
- University of the Witwatersrand, School of Molecular and Cell Biology, Genetics and Developmental Biology Division, P/Bag 3, Johannesburg, 2050, South Africa.
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31
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Youn HS, Saitoh SI, Miyake K, Hwang DH. Inhibition of homodimerization of Toll-like receptor 4 by curcumin. Biochem Pharmacol 2006; 72:62-9. [PMID: 16678799 DOI: 10.1016/j.bcp.2006.03.022] [Citation(s) in RCA: 163] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2006] [Revised: 03/28/2006] [Accepted: 03/28/2006] [Indexed: 11/23/2022]
Abstract
Toll-like receptors play a key role in sensing microbial components and inducing innate immune responses. Ligand-induced dimerization of TLR4 is required for the activation of downstream signaling pathways. Thus, the receptor dimerization may be one of the first lines of regulation in activating TLR-mediated signaling pathways and induction of subsequent immune responses. LPS induces the activation of NF-kappaB and IRF3 through MyD88- or TRIF-dependent pathways. Curcumin, a polyphenol found in the plant Curcuma longa, has been shown to suppress the activation of NF-kappaB induced by various pro-inflammatory stimuli by inhibiting IKKbeta kinase activity in MyD88-dependent pathway. Curcumin also inhibited LPS-induced IRF3 activation. These results imply that curcumin inhibits both MyD88- and TRIF-dependent pathways in LPS-induced TLR4 signaling. However, in TRIF-dependent pathway, curcumin did not inhibit IRF3 activation induced by overexpression of TRIF in 293T cells. These results suggest that TLR4 receptor complex is the molecular target of curcumin in addition to IKKbeta. Here, we report biochemical evidence that phytochemicals (curcumin and sesquiterpene lactone) inhibit both ligand-induced and ligand-independent dimerization of TLR4. Furthermore, these results demonstrate that small molecules with non-microbial origin can directly inhibit TLRs-mediated signaling pathways at the receptor level. These results imply that the activation of TLRs and subsequent immune/inflammatory responses induced by endogenous molecules or chronic infection can be modulated by certain dietary phytochemicals we consume daily.
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Affiliation(s)
- Hyung S Youn
- USDA, ARS, Western Human Nutrition Research Center, and Department of Nutrition, University of California, Davis, Meyer Hall, One Shields Ave., CA 95616, USA
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32
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Schmidt TJ. Structure-Activity Relationships of Sesquiterpene Lactones. STUDIES IN NATURAL PRODUCTS CHEMISTRY 2006. [DOI: 10.1016/s1572-5995(06)80030-x] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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33
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Huang PR, Yeh YM, Wang TCV. Potent inhibition of human telomerase by helenalin. Cancer Lett 2005; 227:169-74. [PMID: 16112419 DOI: 10.1016/j.canlet.2004.11.045] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2004] [Revised: 11/25/2004] [Accepted: 11/28/2004] [Indexed: 11/18/2022]
Abstract
Telomerase activity is repressed in normal human somatic cells, but is activated in most cancers, suggesting that telomerase may be an important target for cancer therapy. Inhibition of telomerase in cancer cells has been shown to limit the growth of human cancer cells in culture. In this study, we report that helenalin, a natural sesquiterpene lactone, is a potent and selective inhibitor for human telomerase. In vitro studies indicate that this drug can inactivate telomerase directly in a manner that is dependent on concentration and time. The inhibitory action of this drug on telomerase is selective since the presence of excessive externally added proteins did not protect the inhibition and all of the other enzymes tested in this study were not inhibited by this drug. Furthermore, we demonstrated that helenalin can inhibit the expression of hTERT and telomerase in hematopoietic cancer cells. Therefore, the anti-tumor activity of helenalin is attributed, at least in part, to the inhibition of telomerase.
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Affiliation(s)
- Pei-Rong Huang
- Department of Molecular and Cellular Biology, Chang Gung University, Kwei-San, Tao-Yuan 333, Taiwan, ROC
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34
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Haefner B. The transcription factor NF-kappaB as drug target. PROGRESS IN MEDICINAL CHEMISTRY 2005; 43:137-88. [PMID: 15850825 DOI: 10.1016/s0079-6468(05)43005-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Affiliation(s)
- Burkhard Haefner
- Department of Inflammation, Johnson & Johnson Pharmaceutical Research and Development, A Division of Janssen Pharmaceutica, Beerse, Belgium
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35
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Cho JY, Kim AR, Jung JH, Chun T, Rhee MH, Yoo ES. Cytotoxic and pro-apoptotic activities of cynaropicrin, a sesquiterpene lactone, on the viability of leukocyte cancer cell lines. Eur J Pharmacol 2004; 492:85-94. [PMID: 15178350 DOI: 10.1016/j.ejphar.2004.03.027] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2004] [Accepted: 03/10/2004] [Indexed: 11/21/2022]
Abstract
Cynaropicrin, a sesquiterpene lactone from Saussurea lappa, has been reported to possess immunomodulatory effects on cytokine release, nitric oxide production and immunosuppressive effects. In this study, we have examined cytotoxic effect of cynaropicrin against several types of cell lines such as macrophages, eosinophils, fibroblasts and lymphocytes. Cynaropicrin potently inhibited the proliferation of leukocyte cancer cell lines, such as U937, Eol-1 and Jurkat T cells, but some other cells such as Chang liver cells and human fibroblast cell lines were not strongly suppressed by cynaropicrin treatment. The cytotoxic effect of cynaropicrin was due to inducing apoptosis and cell cycle arrest at G1/S phase, according to flow-cytometric, DNA fragmentation and morphological analyses using U937 cells. Evidence that combination treatment with l-cysteine and N-acetyl-l-cysteine, reactive oxygen species scavengers, or rottlerin (1-[6-[(3-acetyl-2,4,6-trihydroxy-5-methylphenyl)methyl]-5,7-dihydroxy-2, 2-dimethyl-2H-1-benzopyran-8-yl]-3-phenyl-2-propen-1-one), a specific protein kinase (PK) Cdelta inhibitor, abolished cynaropicrin-mediated cytotoxicity and morphological change, and that cynaropicrin-induced proteolytic cleavage of PKCdelta suggests that reactive oxygen species and PKCdelta may play an important role in mediating pro-apoptotic activity by cynaropicrin. Taken together, these results indicate that cynaropicrin may be a potential anticancer agent against some leukocyte cancer cells such as lymphoma or leukemia, through pro-apoptotic activity.
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Affiliation(s)
- Jae Youl Cho
- School of Biotechnology and Bioengineering, Kangwon National University, Chuncheon, 192-1, Hyoja2-Dong, Chuncheon, Kangwon-Do 200-701, South Korea.
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