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Santos MBD, Carvalho Marques B, Miranda Ayusso G, Rocha Garcia MA, Chiquetto Paracatu L, Pauli I, Silva Bolzani V, Defini Andricopulo A, Farias Ximenes V, Zeraik ML, Regasini LO. Chalcones and their B-aryl analogues as myeloperoxidase inhibitors: In silico, in vitro and ex vivo investigations. Bioorg Chem 2021; 110:104773. [PMID: 33744807 DOI: 10.1016/j.bioorg.2021.104773] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 01/29/2021] [Accepted: 02/22/2021] [Indexed: 12/23/2022]
Abstract
In the present study, a series of chalcones and their B-aryl analogues were prepared and evaluate as inhibitors of myeloperoxidase (MPO) chlorinating activity, using in vitro and ex vivo assays. Among these, B-thiophenyl chalcone (analogue 9) demonstrated inhibition of in vitro and ex vivo MPO chlorinating activity, exhibiting IC50 value of 0.53 and 19.2 µM, respectively. Potent ex vivo MPO inhibitors 5, 8 and 9 were not toxic to human neutrophils at 50 µM, as well as displayed weak 2,2-diphenyl-1-pycrylhydrazyl radical (DPPH•) and hypochlorous acid (HOCl) scavenger abilities. Docking simulations indicated binding mode of MPO inhibitors, evidencing hydrogen bonds between the amino group at 4'position (ring A) of chalcones with Gln91, Asp94, and Hys95 MPO residues. In this regard, the efficacy and low toxicity promoted aminochalcones and arylic analogues to the rank of hit compounds in the search for new non-steroidal anti-inflammatory compounds.
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Affiliation(s)
- Mariana Bastos Dos Santos
- Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), 15054-000 São José do Rio Preto, SP, Brazil
| | - Beatriz Carvalho Marques
- Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), 15054-000 São José do Rio Preto, SP, Brazil
| | - Gabriela Miranda Ayusso
- Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), 15054-000 São José do Rio Preto, SP, Brazil
| | - Mayara Aparecida Rocha Garcia
- Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), 15054-000 São José do Rio Preto, SP, Brazil
| | - Luana Chiquetto Paracatu
- Department of Chemistry, Faculty of Sciences, São Paulo State University (UNESP), 17033-360 Bauru, SP, Brazil
| | - Ivani Pauli
- Physics Institute of São Carlos, University of São Paulo, 13563-120 São Carlos, SP, Brazil
| | - Vanderlan Silva Bolzani
- Department of Organic Chemistry, Institute of Chemistry, São Paulo State University, 14800-900 Araraquara, SP, Brazil
| | | | - Valdecir Farias Ximenes
- Department of Chemistry, Faculty of Sciences, São Paulo State University (UNESP), 17033-360 Bauru, SP, Brazil
| | - Maria Luiza Zeraik
- Department of Chemistry, State University of Londrina (UEL), 86051-990 Londrina, PR, Brazil.
| | - Luis Octavio Regasini
- Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), 15054-000 São José do Rio Preto, SP, Brazil.
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Di Stasi LC. Coumarin Derivatives in Inflammatory Bowel Disease. Molecules 2021; 26:molecules26020422. [PMID: 33467396 PMCID: PMC7830946 DOI: 10.3390/molecules26020422] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 12/21/2020] [Accepted: 12/23/2020] [Indexed: 12/12/2022] Open
Abstract
Inflammatory bowel disease (IBD) is a non-communicable disease characterized by a chronic inflammatory process of the gut and categorized into Crohn’s disease and ulcerative colitis, both currently without definitive pharmacological treatment and cure. The unclear etiology of IBD is a limiting factor for the development of new drugs and explains the high frequency of refractory patients to current drugs, which are also related to various adverse effects, mainly after long-term use. Dissatisfaction with current therapies has promoted an increased interest in new pharmacological approaches using natural products. Coumarins comprise a large class of natural phenolic compounds found in fungi, bacteria, and plants. Coumarin and its derivatives have been reported as antioxidant and anti-inflammatory compounds, potentially useful as complementary therapy of the IBD. These compounds produce protective effects in intestinal inflammation through different mechanisms and signaling pathways, mainly modulating immune and inflammatory responses, and protecting against oxidative stress, a central factor for IBD development. In this review, we described the main coumarin derivatives reported as intestinal anti-inflammatory products and its available pharmacodynamic data that support the protective effects of these products in the acute and subchronic phase of intestinal inflammation.
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Affiliation(s)
- Luiz C Di Stasi
- Laboratory of Phytomedicines, Pharmacology, and Biotechnology (PhytoPharmaTech), Department of Biophysics and Pharmacology, Institute of Biosciences, São Paulo State University (UNESP), 18618-689 Botucatu, SP, Brazil
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Oliveira AS, Nascimento JR, Trovão LO, Alves PCS, Maciel MCG, Silva LDM, Marques AA, Santos APSA, Silva LA, Nascimento FRF, Guerra RNM. The anti-inflammatory activity of Anacardium occidentale L. increases the lifespan of diabetic mice with lethal sepsis. JOURNAL OF ETHNOPHARMACOLOGY 2019; 236:345-353. [PMID: 30872173 DOI: 10.1016/j.jep.2019.03.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 02/14/2019] [Accepted: 03/05/2019] [Indexed: 06/09/2023]
Affiliation(s)
- Aluísio S Oliveira
- Laboratory of Immunophysiology, Federal University of Maranhão, São Luís, Brazil.
| | - Johnny R Nascimento
- Laboratory of Immunophysiology, Federal University of Maranhão, São Luís, Brazil.
| | - Liana O Trovão
- Laboratory of Immunophysiology, Federal University of Maranhão, São Luís, Brazil.
| | - Patrícia C S Alves
- Laboratory of Immunophysiology, Federal University of Maranhão, São Luís, Brazil.
| | | | - Luís Douglas M Silva
- Laboratory of Immunophysiology, Federal University of Maranhão, São Luís, Brazil.
| | - André A Marques
- Laboratory of Immunophysiology, Federal University of Maranhão, São Luís, Brazil.
| | - Ana Paula S A Santos
- Laboratory of Immunophysiology, Federal University of Maranhão, São Luís, Brazil.
| | - Lucilene A Silva
- Laboratory of Immunophysiology, Federal University of Maranhão, São Luís, Brazil.
| | | | - Rosane N M Guerra
- Laboratory of Immunophysiology, Federal University of Maranhão, São Luís, Brazil.
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Ardisson JS, Gonçalves RDCR, Rodrigues RP, Kitagawa RR. Antitumour, Immunomodulatory activity and in silico studies of naphthopyranones targeting iNOS, a relevant target for the treatment of Helicobacter pylori infection. Biomed Pharmacother 2018; 107:1160-1165. [PMID: 30257329 DOI: 10.1016/j.biopha.2018.08.098] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 08/16/2018] [Accepted: 08/17/2018] [Indexed: 01/05/2023] Open
Abstract
The naphthopyranones paepalantine and 5-methoxy-3,4-dehydroxanthomegnin isolated from Paepalanthus sp, showed in previous studies antioxidant, anti-inflammatory, antitumour and antimicrobial potential, such as anti-Helicobacter pylori activity. H. pylori infection is one of the main causes of gastric cancer, causing an excessive inflammatory response through the neutrophils and macrophages infiltration, increasing the release of reactive species and thus inducing the production of pro-inflammatory mediators. In the present study, immunomodulatory activity of naphthopyranones in LPS-stimulated macrophages and cytotoxic action in gastric adenocarcinoma cell lines was evaluated. The potential of interaction of these substances in the iNOS binding site was investigated by molecular docking. Cytotoxic activity in gastric adenocarcinoma cells (AGS) was evaluated by the MTT assay. The results evidenced immunomodulatory potential by inhibiting the pro-inflammatory cytokines and nitric oxide produced by LPS-stimulated macrophages. Cytotoxic activity in AGS cell line was also reported. The results indicated that the studied naphthopyranones are viable alternatives in the treatment and prevention of H. pylori infection as well as the diseases related to this infection, especially gastric cancer.
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Affiliation(s)
- Juliana Santa Ardisson
- Graduate Program in Pharmaceutical Sciences, Federal University of Espirito Santo - UFES, Avenida Marechal Campos 1468, 29047-105 Vitória, ES, Brazil
| | - Rita de Cássia Ribeiro Gonçalves
- Graduate Program in Pharmaceutical Sciences, Federal University of Espirito Santo - UFES, Avenida Marechal Campos 1468, 29047-105 Vitória, ES, Brazil; Department of Pharmaceutical Sciences, Federal University of Espirito Santo - UFES, Avenida Marechal Campos 1468, 29047-105 Vitória, ES, Brazil
| | - Ricardo Pereira Rodrigues
- Graduate Program in Pharmaceutical Sciences, Federal University of Espirito Santo - UFES, Avenida Marechal Campos 1468, 29047-105 Vitória, ES, Brazil
| | - Rodrigo Rezende Kitagawa
- Graduate Program in Pharmaceutical Sciences, Federal University of Espirito Santo - UFES, Avenida Marechal Campos 1468, 29047-105 Vitória, ES, Brazil; Department of Pharmaceutical Sciences, Federal University of Espirito Santo - UFES, Avenida Marechal Campos 1468, 29047-105 Vitória, ES, Brazil.
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Wolf VG, Bonacorsi C, Raddi MSG, da Fonseca LM, Ximenes VF. Octyl gallate, a food additive with potential beneficial properties to treat Helicobacter pylori infection. Food Funct 2017. [PMID: 28640317 DOI: 10.1039/c7fo00707h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Helicobacter pylori infection is marked by intense production of reactive oxygen species (ROS) through the activation of neutrophils that are constantly attracted to the infected gastric mucosa. Here, gallic acid and its alkyl esters were evaluated as compounds able to act as antimicrobial agents and inhibitors of ROS released by H. pylori-activated neutrophils simultaneously. We found that the higher hydrophobicity caused by esterification of gallic acid led to a significant increase in its ability as a cytotoxic agent against H. pylori, a scavenger of ROS and an inhibitor of NADPH oxidase in neutrophils. Octyl gallate, a widely used food additive, showed the highest antimicrobial activity against H. pylori, with a minimum inhibitory concentration (MIC) value of 125 μg mL-1, whereas gallic acid had a MIC value higher than 1000 μg mL-1. The production of superoxide anion radicals was almost 100% abolished by the addition of 10 μM (2.82 μg mL-1) octyl gallate, whereas gallic acid inhibited around 20%. A similar tendency was also found when measuring the production of hypochlorous acid. The protective effect of the esters was cytochemically confirmed. In conclusion, this study showed that hydrophobicity is a crucial factor to obtain a significant anti-ROS and anti-H. pylori activity. Finally, it highlights octyl gallate, a food additive widely used in the food industry, as a promising molecule in the treatment of H. pylori infection.
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Affiliation(s)
- Vanessa Gonçalves Wolf
- Department of Clinical Analysis, Faculty of Pharmaceutical Sciences, UNESP - São Paulo State University, 14800-903, Araraquara, São Paulo, Brazil.
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Damasceno JPL, Rodrigues RP, Gonçalves RDCR, Kitagawa RR. Anti-Helicobacter pylori Activity of Isocoumarin Paepalantine: Morphological and Molecular Docking Analysis. Molecules 2017; 22:molecules22050786. [PMID: 28498343 PMCID: PMC6154667 DOI: 10.3390/molecules22050786] [Citation(s) in RCA: 14] [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: 03/14/2017] [Revised: 04/29/2017] [Accepted: 05/03/2017] [Indexed: 02/07/2023] Open
Abstract
The Helicobacterpylori bacterium is one of the main causes of chronic gastritis, peptic ulcers, and even gastric cancer. It affects an average of half of the world population. Its difficult eradication depends upon multi-drug therapy. Since its classification as a group 1 carcinogenic by International Agency for Research on Cancer (IARC), the importance of H. pylori eradication has obtained a novel meaning. There is considerable interest in alternative therapies for the eradication of H. pylori using compounds from a wide range of natural products. In the present study, we investigated the antibacterial property of the isocoumarin paepalantine against H. pylori and it exhibited significant anti-H. pylori activity at a minimum inhibitory concentration (MIC) of 128 μg/mL and at a minimum bactericidal concentration (MBC) of 256 μg/mL. The scanning electron microscopy (SEM) revealed significant morphological changes of the bacterial cell as a response to a sub-MIC of paepalantine, suggesting a penicillin-binding protein (PBP) inhibition. Computational studies were carried out in order to study binding modes for paepalantine in PBP binding sites, exploring the active and allosteric sites. The data from the present study indicates that paepalantine exhibits significant anti-H. pylori activity, most likely by inhibiting membrane protein synthesis.
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Affiliation(s)
- João Paulo L Damasceno
- Graduate Program in Pharmaceutical Sciences, Federal University of Espirito Santo-UFES, Marechal Campos Av., 1468, Vitoria 29043-900, ES, Brazil.
| | - Ricardo P Rodrigues
- Graduate Program in Pharmaceutical Sciences, Federal University of Espirito Santo-UFES, Marechal Campos Av., 1468, Vitoria 29043-900, ES, Brazil.
| | - Rita de Cássia R Gonçalves
- Graduate Program in Pharmaceutical Sciences, Federal University of Espirito Santo-UFES, Marechal Campos Av., 1468, Vitoria 29043-900, ES, Brazil.
- Department of Pharmaceutical Sciences, Federal University of Espirito Santo-UFES, Marechal Campos Av., 1468, Vitoria 29043-900, ES, Brazil.
| | - Rodrigo R Kitagawa
- Graduate Program in Pharmaceutical Sciences, Federal University of Espirito Santo-UFES, Marechal Campos Av., 1468, Vitoria 29043-900, ES, Brazil.
- Department of Pharmaceutical Sciences, Federal University of Espirito Santo-UFES, Marechal Campos Av., 1468, Vitoria 29043-900, ES, Brazil.
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Saroni Arwa P, Zeraik ML, Ximenes VF, da Fonseca LM, Bolzani VDS, Siqueira Silva DH. Redox-active biflavonoids from Garcinia brasiliensis as inhibitors of neutrophil oxidative burst and human erythrocyte membrane damage. JOURNAL OF ETHNOPHARMACOLOGY 2015; 174:410-418. [PMID: 26320685 DOI: 10.1016/j.jep.2015.08.041] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 08/22/2015] [Accepted: 08/26/2015] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Garcinia brasiliensis, a plant native to the Brazilian Amazon Rainforest, is used in traditional medicine to treat inflammation of the urinary tract, peptic ulcers, arthritis and other conditions. AIM OF THE STUDY The purposes of this study were to analyze the chemical constituents of G. brasiliensis branches and leaves and to evaluate the potential of isolated compounds to act as inhibitors of both the oxidative burst of stimulated neutrophils and oxidative damage in human erythrocyte membranes to verify the antioxidant and anti-inflammatory effects of this plant. MATERIALS AND METHODS Neutrophils were isolated from the blood of healthy donors by Ficoll-Paque density gradient centrifugation. Superoxide anion and total reactive oxygen species (ROS) produced by stimulated neutrophils were measured by WST-1 reduction and luminol-enhanced chemiluminescence assays, respectively. Radical-induced lipoperoxidation and hemolysis were performed using erythrocytes from the blood of healthy donors. Compounds were isolated from G. brasiliensis branches and leaves by HPLC microfractionation, and structure elucidation of the isolated compounds was performed based on NMR and HR-MS analyses. RESULTS The biflavonoids procyanidin, fukugetin, amentoflavone and podocarpusflavone isolated from G. brasiliensis showed potent inhibitory effects on the oxidative burst of human neutrophils, inhibiting ROS production by 50% at 1 μmol L(-1). These biflavonoids also proved to be potent inhibitors of hemolysis (with 88 ± 7% inhibition at 50 µmol L(-1) for procyanidin) and lipid peroxidation in human erythrocytes, with a malondialdehyde level (a biomarker of oxidative stress) of 8.5 ± 0.3 nmol/mg Hb at 50 µmol L(-1) for procyanidin. CONCLUSIONS These findings indicate that the biflavonoids extracted from G. brasiliensis branches and leaves modulate oxidative stress via inhibition of NADPH oxidase and ROS production by stimulated human neutrophils. Furthermore, the biflavonoids exhibited potent inhibition of oxidant hemolysis and lipid peroxidation induced by AAPH in human erythrocytes. Therefore, these studies suggest the use of G. brasiliensis extract as an antioxidant and anti-inflammatory agent.
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Affiliation(s)
- Phanuel Saroni Arwa
- Department of Organic Chemistry, Nucleus of Bioassays, Ecophysiology and Biosynthesis of Natural Products (NUBBE), Institute of Chemistry, São Paulo State University (UNESP), P.O. Box 355, 14800-900 Araraquara, São Paulo, Brazil
| | - Maria Luiza Zeraik
- Department of Organic Chemistry, Nucleus of Bioassays, Ecophysiology and Biosynthesis of Natural Products (NUBBE), Institute of Chemistry, São Paulo State University (UNESP), P.O. Box 355, 14800-900 Araraquara, São Paulo, Brazil.
| | - Valdecir Farias Ximenes
- Department of Chemistry, School of Sciences, São Paulo State University (UNESP), P.O. Box 473, 17033-360 Bauru, São Paulo, Brazil
| | - Luiz Marcos da Fonseca
- Department of Clinical Analysis, School of Pharmaceutical Sciences, São Paulo State University (UNESP), P.O. Box 502, 14801-902 Araraquara, São Paulo, Brazil
| | - Vanderlan da Silva Bolzani
- Department of Organic Chemistry, Nucleus of Bioassays, Ecophysiology and Biosynthesis of Natural Products (NUBBE), Institute of Chemistry, São Paulo State University (UNESP), P.O. Box 355, 14800-900 Araraquara, São Paulo, Brazil
| | - Dulce Helena Siqueira Silva
- Department of Organic Chemistry, Nucleus of Bioassays, Ecophysiology and Biosynthesis of Natural Products (NUBBE), Institute of Chemistry, São Paulo State University (UNESP), P.O. Box 355, 14800-900 Araraquara, São Paulo, Brazil.
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Damasceno JPL, Giuberti CDS, Gonçalves RDCR, Kitagawa RR. Preformulation study and influence of DMSO and propylene glycol on the antioxidant action of isocoumarin paepalantine isolated from Paepalanthus bromelioides. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2015. [DOI: 10.1016/j.bjp.2015.07.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Santos EO, Kabeya LM, Figueiredo-Rinhel AS, Marchi LF, Andrade MF, Piatesi F, Paoliello-Paschoalato AB, Azzolini AEC, Lucisano-Valim YM. Flavonols modulate the effector functions of healthy individuals' immune complex-stimulated neutrophils: A therapeutic perspective for rheumatoid arthritis. Int Immunopharmacol 2014; 21:102-11. [DOI: 10.1016/j.intimp.2014.04.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 04/04/2014] [Accepted: 04/12/2014] [Indexed: 12/25/2022]
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Ethyl ferulate, a component with anti-inflammatory properties for emulsion-based creams. Molecules 2014; 19:8124-39. [PMID: 24941338 PMCID: PMC6271385 DOI: 10.3390/molecules19068124] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 06/10/2014] [Accepted: 06/10/2014] [Indexed: 11/16/2022] Open
Abstract
Ethyl ferulate (FAEE) has been widely studied due to its beneficial heath properties and, when incorporated in creams, shows a high sun protection capacity. Here we aimed to compare FAEE and its precursor, ferulic acid (FA), as free radical scavengers, inhibitors of oxidants produced by leukocytes and the alterations in rheological properties when incorporated in emulsion based creams. The cell-free antiradical capacity of FAEE was decreased compared to FA. However, FAEE was more effective regarding the scavenging of reactive oxygen species produced by activated leukocytes. Stress and frequency sweep tests showed that the formulations are more elastic than viscous. The viscoelastic features of the formulations were confirmed in the creep and recovery assay and showed that the FAEE formulation was less susceptive to deformation. Liberation experiments showed that the rate of FAEE release from the emulsion was slower compared to FA. In conclusion, FAEE is more effective than FA as a potential inhibitor of oxidative damage produced by oxidants generated by leukocytes. The rheological alterations caused by the addition of FAEE are indicative of lower spreadability, which could be useful for formulations used in restricted areas of the skin.
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Bioactive secondary metabolites from Phomopsis sp., an endophytic fungus from Senna spectabilis. Molecules 2014; 19:6597-608. [PMID: 24858094 PMCID: PMC6271730 DOI: 10.3390/molecules19056597] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 05/14/2014] [Accepted: 05/19/2014] [Indexed: 11/23/2022] Open
Abstract
Chemical investigation of an acetonitrile fraction from the endophytic fungus Phomopsis sp. led to the isolation of the new natural product 2-hydroxy-alternariol (7) together with the known compounds cytochalasins J (1) and H (2), 5'-epialtenuene (3) and the mycotoxins alternariol monomethyl ether (AME, 4), alternariol (AOH, 5) and cytosporone C (6). The structure of the new compound was elucidated by using 1-D and 2-D NMR (nuclear magnetic resonance) and high resolution mass spectrometry. The cytochalasins J (1) and H (2) and AOH (5) exhibited potent inhibition of the total ROS (reactive oxygen species) produced by stimulated human neutrophils and acted as potent potential anti-inflammatory agents. Moreover, cytochalasin H (2) demonstrated antifungal and acetylcholinesterase enzyme (AChE) inhibition in vitro.
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Gubiani JR, Zeraik ML, Oliveira CM, Ximenes VF, Nogueira CR, Fonseca LM, Silva DHS, Bolzani VS, Araujo AR. Biologically active eremophilane-type sesquiterpenes from Camarops sp., an endophytic fungus isolated from Alibertia macrophylla. JOURNAL OF NATURAL PRODUCTS 2014; 77:668-72. [PMID: 24588269 DOI: 10.1021/np400825s] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Two new eremophilane-type sesquiterpenes, xylarenones F (3) and G (4), have been isolated from solid substrate cultures of a Camarops sp. endophytic fungus isolated from Alibertia macrophylla, together with the known compounds xylarenones C (1) and D (2). The structures and relative configurations of 1-4 were elucidated by extensive NMR and HRESIMS spectroscopic analysis. Due to their effects on the respiratory burst of neutrophils, which included inhibition of the reactive oxygen species production, these sesquiterpenes exhibited potential anti-inflammatory and antioxidant properties.
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Affiliation(s)
- Juliana R Gubiani
- Departamento de Química Orgânica, NuBBE - Núcleo de Bioensaios, Biossíntese e Ecofisiologia de Produtos Naturais, Instituto de Química, Universidade Estadual Paulista , Rua Professor Francisco Degni, 55, 14800-900, Araraquara, São Paulo, Brazil
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Kabeya LM, Fuzissaki CN, Taleb-Contini SH, da C. Ferreira AM, Naal Z, Santos EO, Figueiredo-Rinhel AS, Azzolini AEC, Vermelho RB, Malvezzi A, -do Amaral AT, Lopes JLC, Lucisano-Valim YM. 7-Hydroxycoumarin modulates the oxidative metabolism, degranulation and microbial killing of human neutrophils. Chem Biol Interact 2013; 206:63-75. [DOI: 10.1016/j.cbi.2013.08.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 07/14/2013] [Accepted: 08/17/2013] [Indexed: 11/30/2022]
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14
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Kabeya LM, Fuzissaki CN, Andrade MF, Azzolini AECS, Taleb-Contini SH, Vermelho RB, Lopes JLC, Lucisano-Valim YM. 4-methylcoumarin derivatives inhibit human neutrophil oxidative metabolism and elastase activity. J Med Food 2013; 16:692-700. [PMID: 23905650 DOI: 10.1089/jmf.2012.0184] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Increased neutrophil activation significantly contributes to the tissue damage in inflammatory illnesses; this phenomenon has motivated the search for new compounds to modulate their effector functions. Coumarins are natural products that are widely consumed in the human diet. We have evaluated the antioxidant and immunomodulator potential of five 4-methylcoumarin derivatives. We found that the 4-methylcoumarin derivatives inhibited the generation of reactive oxygen species by human neutrophils triggered by serum-opsonized zymosan or phorbol-12-myristate-13-acetate; this inhibition occurred in a concentration-dependent manner, as revealed by lucigenin- and luminol-enhanced chemiluminescence assays. Cytotoxicity did not mediate this inhibitory effect. The 7,8-dihydroxy-4-methylcoumarin suppressed the neutrophil oxidative metabolism more effectively than the 6,7- and 5,7-dihydroxy-4-methylcoumarins, but the 5,7- and 7,8-diacetoxy-4-methylcoumarins were less effective than their hydroxylated counterparts. An analysis of the biochemical pathways suggested that the 6,7- and 7,8-dihydroxy-4-methylcoumarins inhibit the protein kinase C-mediated signaling pathway, but 5,7-dihydroxy-4-methylcoumarin, as well as 5,7- and 7,8-diacetoxy-4-methylcoumarins do not significantly interfere in this pathway of the activation of the human neutrophil oxidative metabolism. The 4-methylcoumarin derivatives bearing the catechol group suppressed the elastase and myeloperoxidase activity and reduced the 1,1-diphenyl-2-picrylhydrazyl free radical the most strongly. Interestingly, the 5,7-dihydroxy-4-methylcoumarin scavenged hypochlorous acid more effectively than the o-dihydroxy-substituted 4-methylcoumarin derivatives, and the diacetoxylated 4-methylcoumarin derivatives scavenged hypochlorous acid as effectively as the 7,8-dihydroxy-4-methylcoumarin. The significant influence of small structural modifications in the inhibitory potential of 4-methylcoumarin derivatives on the effector functions of neutrophil makes them interesting candidates to develop new drugs for the treatment of inflammatory diseases mediated by increased neutrophil activation.
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Affiliation(s)
- Luciana M Kabeya
- Department of Physics and Chemistry, School of Pharmaceutical Sciences, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
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Moreira RR, Martins GZ, Pietro RC, Sato DN, Pavan FR, Leite SR, Vilegas W, Leite CQ. Paepalanthus spp: Antimycobacterial activity of extracts, methoxylated flavonoids and naphthopyranone fractions. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2013. [DOI: 10.1590/s0102-695x2012005000137] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Aparecida de Assis S, Vellosa JCR, Brunetti IL, Khalil NM, Leite KMDSC, Martins ABG, Oliveira OMMDF. Antioxidant activity, ascorbic acid and total phenol of exotic fruits occurring in Brazil. Int J Food Sci Nutr 2009; 60:439-48. [DOI: 10.1080/09637480701780641] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kitagawa RR, Raddi MSG, Santos LCD, Vilegas W. A New Cytotoxic Naphthoquinone from Paepalanthus latipes. Chem Pharm Bull (Tokyo) 2004; 52:1487-8. [PMID: 15577252 DOI: 10.1248/cpb.52.1487] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Quinones constitute an important class of naturally occurring compounds. They are found in plants, fungi and bacteria. Large number of quinones has been associated with antitumor, antibacterial, antimalarial and antifungal activities. In this work we describe the isolation, structure determination and the cytotoxic index of a new 1,4-naphthoquinone isolated from the capitula of Paepalanthus latipes.
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Affiliation(s)
- Rodrigo Rezende Kitagawa
- Instituto de Química de Araraquara, Universidade Estadual Paulista Júlio de Mesquita Filho, Rua Prof. Francisco Degni, Araraquara, SP, Brazil
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