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Kalenga T, Ndoile MM, Atilaw Y, Gilissen PJ, Munissi JJE, Rudenko A, Bourgard C, Sunnerhagen P, Nyandoro SS, Erdelyi M. Biflavanones, Chalconoids, and Flavonoid Analogues from the Stem Bark of Ochna holstii. J Nat Prod 2021; 84:364-372. [PMID: 33511842 PMCID: PMC7923207 DOI: 10.1021/acs.jnatprod.0c01017] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Indexed: 05/20/2023]
Abstract
Two new biflavanones (1 and 2), three new bichalconoids (3-5), and 11 known flavonoid analogues (6-16) were isolated from the stem bark extract (CH3OH-CH2Cl2, 7:3, v/v) of Ochna holstii. The structures of the isolated metabolites were elucidated by NMR spectroscopic and mass spectrometric analyses. The crude extract and the isolated metabolites were evaluated for antibacterial activity against Bacillus subtilis (Gram-positive) and Escherichia coli (Gram-negative) as well as for cytotoxicity against the MCF-7 human breast cancer cell line. The crude extract and holstiinone A (1) exhibited moderate antibacterial activity against B. subtilis with MIC values of 9.1 μg/mL and 14 μM, respectively. The crude extract and lophirone F (14) showed cytotoxicity against MCF-7 with EC50 values of 11 μg/mL and 24 μM, respectively. The other isolated metabolites showed no significant antibacterial activities (MIC > 250 μM) and cytotoxicities (EC50 ≥ 350 μM).
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Affiliation(s)
- Thobias
M. Kalenga
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Monica M. Ndoile
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Yoseph Atilaw
- Department
of Chemistry − BMC, Uppsala University, SE-751 23 Uppsala, Sweden
| | - Pieter J. Gilissen
- Institute
for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Joan J. E. Munissi
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Anastasia Rudenko
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, SE-405 30 Gothenburg, Sweden
- Centre
for Antibiotic Resistance Research (CARe) at the University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Catarina Bourgard
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, SE-405 30 Gothenburg, Sweden
- Centre
for Antibiotic Resistance Research (CARe) at the University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Per Sunnerhagen
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, SE-405 30 Gothenburg, Sweden
- Centre
for Antibiotic Resistance Research (CARe) at the University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Stephen S. Nyandoro
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Mate Erdelyi
- Department
of Chemistry − BMC, Uppsala University, SE-751 23 Uppsala, Sweden
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Florencio M, Tomás Nery E, Rosa D, Auxiliadora Nascimento Ribeiro T, de Brito Braz Moraes J, Araujo Zuma A, da Silva Trindade JD, Dutra Barbosa da Rocha RF, Decote-Ricardo D, Pinto-da-Silva LH, M Motta MC, de Carvalho MG, Fampa P. The effect of the biflavonoid 2″,3″-dihydroochnaflavone on Trypanosoma cruzi Y strain. Parasitol Int 2020; 79:102180. [PMID: 32860937 DOI: 10.1016/j.parint.2020.102180] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 07/16/2020] [Accepted: 08/11/2020] [Indexed: 11/18/2022]
Abstract
Trypanosoma cruzi is the causative agent of Chagas disease which affects 8 million people in Latin America. The parasite possesses high capacity to evade host immune system and the available drugs to treat Chagas disease present low efficacy combined to serious side effects to patients. Therefore, the identification of alternative therapeutics is essential. Brazilian flora exhibits an immense diversity of metabolites with great potential to be developed into new drugs. We investigated the action of 2″,3″-dihydroochnaflavone a biflavonoid extracted from Luxemburgia nobilis Eichler ex Engl. (Ochnaceae) against T. cruzi (Y strain). Our experiments showed that this compound is effective against parasite epimastigote forms, presenting IC50 value of (2.5 ± 0.1) μM after 96 h of treatment. Ultrastructure alterations were also detected in treated epimastigotes especially mitochondrial enlargement at the kinetoplast region. At the concentration of 30 μM, the compound killed (61.6 ± 3.37)% of the parasite in its amastigote form. In addition, at the same concentration, the compound killed all trypamastigotes growing within murine macrophages after 7-9 days of infection. Nonetheless, the biflavonoid concentrations were harmless to murine enriched population of lymphocytes and peritoneal macrophages. These results indicate that 2″,3″- dihydroochnaflavone presents activity against T. cruzi.
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Affiliation(s)
- Melissa Florencio
- Departamento de Ciências Farmacêuticas, Instituto de Ciências Biológicas e da Saúde, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23.890-000, Brazil; Programa de Pós-graduação em Ciências Veterinárias, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23.890-000, Brazil
| | - Eveliny Tomás Nery
- Departamento de Ciências Farmacêuticas, Instituto de Ciências Biológicas e da Saúde, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23.890-000, Brazil; Faculty of Health and Medical Sciences, University of Surrey - Stag Hill Campus, GU2 7TE Guildford, UK
| | - Dayana Rosa
- Departamento de Ciências Farmacêuticas, Instituto de Ciências Biológicas e da Saúde, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23.890-000, Brazil; Programa de Pós-graduação em Ciências Veterinárias, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23.890-000, Brazil
| | - Tereza Auxiliadora Nascimento Ribeiro
- Departamento de Química Orgânica, Instituto de Química, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23.890-000, Brazil; Departamento de Química, Instituto de Ciências Exatas e da Terra, Universidade Federal de Mato Grosso, Cuiabá, MT 78060-900, Brazil
| | - Julliane de Brito Braz Moraes
- Departamento de Microbiologia e Imunologia Veterinária, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23.890-000, Brazil
| | - Aline Araujo Zuma
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, CEP 21941-540 Rio de Janeiro, RJ, Brazil
| | - Joana D'Arc da Silva Trindade
- Departamento de Química Orgânica, Instituto de Química, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23.890-000, Brazil
| | - Raphael Francisco Dutra Barbosa da Rocha
- Programa de Pós-graduação em Ciências Veterinárias, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23.890-000, Brazil; Departamento de Microbiologia e Imunologia Veterinária, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23.890-000, Brazil
| | - Debora Decote-Ricardo
- Departamento de Microbiologia e Imunologia Veterinária, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23.890-000, Brazil
| | - Lucia Helena Pinto-da-Silva
- Departamento de Microbiologia e Imunologia Veterinária, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23.890-000, Brazil
| | - Maria Cristina M Motta
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, CEP 21941-540 Rio de Janeiro, RJ, Brazil
| | - Mario Geraldo de Carvalho
- Departamento de Química Orgânica, Instituto de Química, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23.890-000, Brazil
| | - Patrícia Fampa
- Departamento de Ciências Farmacêuticas, Instituto de Ciências Biológicas e da Saúde, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23.890-000, Brazil.
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Rocha MP, Campana PRV, Pádua RM, Souza Filho JD, Ferreira D, Braga FC. (3,3″)-Linked Biflavanones from Ouratea spectabilis and Their Effects on the Release of Proinflammatory Cytokines in THP-1 Cells. J Nat Prod 2020; 83:1891-1898. [PMID: 32484349 DOI: 10.1021/acs.jnatprod.0c00074] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Ouratea spectabilis is an arborous species traditionally used in Brazil as an anti-inflammatory agent. Four new (3,3″)-linked biflavanone O-methyl ethers, named ouratein A (1), B (2), C (3), and D (4), were isolated from the bark extract of the species. Ouratein A (1) is an enantiomer of neochamagesmine A, which has never been described before. The structures were elucidated by extensive spectroscopic data analyses, whereas their absolute configurations were defined by electronic circular dichroism data. Ouratein D (4) inhibited in vitro the release of the pro-inflammatory cytokine CCL2 by lipopolysaccharide-stimulated THP-1 cells (IC50 of 3.1 ± 1.1 μM), whereas TNF and IL-1β release were not reduced by any of the biflavanones. These findings show ouratein D (4) as a selective CCL2 inhibitor, which may have potential for the development of new anti-inflammatory agents to prevent or treat cardiovascular diseases.
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Affiliation(s)
- Marina P Rocha
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Priscilla R V Campana
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Rodrigo M Pádua
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - José D Souza Filho
- Department of Chemistry, Institute of Exact Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Daneel Ferreira
- Department of BioMolecular Sciences, Division of Pharmacognosy, School of Pharmacy, The University of Mississippi, University, Mississippi 38677, United States
| | - Fernão C Braga
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
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Iniaghe LO, Ighodaro I, Magaji MG, Tabot TP, Maduka IT. Neurobehavioural evaluation of Lophira alata (Ochnaceae) stem bark extract in mice. J Basic Clin Physiol Pharmacol 2015; 26:523-9. [PMID: 25781676 DOI: 10.1515/jbcpp-2014-0096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 01/05/2015] [Indexed: 11/15/2022]
Abstract
BACKGROUND Stem bark and leaves of Lophira alata (Family: Ochnaceae) have been used traditionally for their anti-psychotic, anti-convulsant and anxiolytic properties. Since no existing data was found on the neurobehavioural properties, this study was carried out to evaluate some neurobehavioural properties of the aqueous extract of the stem bark of L. alata in animal models. METHODS The oral mean lethal dose (LD50) of the extract was estimated, and preliminary phytochemical screening was conducted. Lophira alata extract (200, 400 and 800 mg/kg, p.o.) was investigated for antidepressant effect using the forced swim and tail suspension tests, and the anxiolytic potential was assessed using the stair case and hole board tests. Pentylenetetrazole-induced convulsion test was used to investigate the anticonvulsant potential of the extract. RESULTS The LD50 was estimated to be >5000 mg/kg. Oral administration of L. alata extract produced a significant (p<0.05) non-dose-dependent decrease in the period of immobility in both the forced swim and tail suspension tests. While a significant decrease (p<0.05) in episodes of grooming was recorded in the staircase test, the number of head dips was not significantly reduced (p>0.05) in the hole board test. In the pentylenetetrazole-induced convulsion, a non-dose-dependent increase in onset of tonic-clonic seizures and protection from death was recorded. CONCLUSIONS The results obtained suggest that the aqueous stem bark extract of L. alata possesses neurobehavioural properties which may account for its use in ethnomedicine.
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Kongstad KT, Wubshet SG, Johannesen A, Kjellerup L, Winther AML, Jäger AK, Staerk D. High-resolution screening combined with HPLC-HRMS-SPE-NMR for identification of fungal plasma membrane H(+)-ATPase inhibitors from plants. J Agric Food Chem 2014; 62:5595-5602. [PMID: 24830509 DOI: 10.1021/jf501605z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Crude extracts of 33 plant species were assessed for fungal plasma membrane (PM) H(+)-ATPase inhibition. This led to identification of 18 extracts showing more than 95% inhibition at a concentration of 7.5 mg/mL and/or a concentration-dependent activity profile. These extracts were selected for semi-high-resolution fungal PM H(+)-ATPase inhibition screening, and, on the basis of these results, Haplocoelum foliolosum (Hiern) Bullock and Sauvagesia erecta L. were selected for investigation by high-resolution fungal PM H(+)-ATPase inhibition screening. Structural analysis performed by high-performance liquid chromatography-high-resolution mass spectrometry-solid-phase extraction-nuclear magnetic resonance spectroscopy (HPLC-HRMS-SPE-NMR) led to identification of chebulagic acid (1) and tellimagrandin II (2) from H. foliolosum. Preparative-scale isolation of the two metabolites allowed determination of IC50 values for PM H(+)-ATPase, and growth inhibition of Saccharomyces cerevisiae and Candida albicans. Chebulagic acid and tellimagrandin II are both potent inhibitors of the PM H(+)-ATPase with inhibitory effect on the growth of S. cerevisiae.
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Affiliation(s)
- Kenneth T Kongstad
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen , Universitetsparken 2, DK-2100 Copenhagen, Denmark
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Makhafola TJ, Samuel BB, Elgorashi EE, Eloff JN. Ochnaflavone and ochnaflavone 7-O-methyl ether two antibacterial biflavonoids from Ochna pretoriensis (Ochnaceae). Nat Prod Commun 2012; 7:1601-1604. [PMID: 23413563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Abstract
The acetone extract of Ochna pretoriensis was evaluated for antibacterial activity using bioautography and serial microplate dilution methods against four nosocomial bacterial pathogens namely: Escherichia coli, Staphylococcus aureus, Enterococcus faecalis and Pseudomonas aeruginosa. A bioassay-guided fractionation of the crude extract led to the isolation of two antibacterial biflavonoids, ochnaflavone and ochnaflavone 7-O-methyl ether. Gram-negative bacteria were more sensitive to the isolated compounds than the Gram-positive bacteria (MIC values: 31.3 microg/mL for P. aeruginosa and 62.5 microg/mL for S. aureus). In addition, the isolated compounds were assessed for their potential toxic effects in the MTT toxicity assay using monkey kidney vero cells and Ames genotoxicity test using Salmonella typhimurium strain TA98. LC50 values were 125.9 microg/mL for ochnaflavone and 162.0/microg/mL for ochnaflavone 7-O-methyl ether. The isolated compounds have selectivity index values ranging from 1.29 to 4.03. Selectivity index values higher than one indicate that test samples are less toxic to the host cells than to the pathogens. The biflavonoids did not have any mutagenic effects in the Salmonella/microsome assay without metabolic activation.
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Affiliation(s)
- Tshepiso J Makhafola
- Phytomedicine Programme, Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Private Bag x04, Onderstepoort, 0110, South Africa
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Bermúdez J, Rodríguez M, Hasegawa M, González-Mujica F, Duque S, Ito Y. (6R,9S)-6"-(4"-hydroxybenzoyl)-roseoside, a new megastigmane derivative from Ouratea polyantha and its effect on hepatic glucose-6-phosphatase. Nat Prod Commun 2012; 7:973-976. [PMID: 22978207 PMCID: PMC3445296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Abstract
A new megastigmane derivative, (6R,9S)-6'-(4"-hydroxybenzoyl)-roseoside (1) and two known compounds, the biflavoneagathisflavone (2) and 4-hydroxybenzoic acid (3) were isolated and purified from leaves and stems of Ouratea polyantha Engl. Agathisflavone was isolated in a single high-speed countercurrent chromatography run, while the megastigmane was purified in two steps, by using a combination of high-speed countercurrent chromatography and analytical column chromatography. All structures were elucidated on the basis of spectral evidence and comparison with literature data. Compound 1 was characterized by [alpha]D20, UV-Vis, IR, MS, 1H NMR, 13C NMR, HMQC, HMBC, COSY and NOESY. Compounds 1 and 2 showed an inhibitory effect of 63.6 and 13.7% on the G-6-Pase intact microsomes, respectively.
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Affiliation(s)
- Jairo Bermúdez
- Laboratorio de Productos Naturales, Escuela de Química, Facultad de Ciencias, Universidad Central de Venezuela. Apartado Postal 47102. Caracas, Venezuela
- Bioseparation Technology Laboratory, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, 10 Center drive, Building 10, Room 8N230, MD 20892-1762, USA
| | - María Rodríguez
- Laboratorio de Productos Naturales, Escuela de Química, Facultad de Ciencias, Universidad Central de Venezuela. Apartado Postal 47102. Caracas, Venezuela
| | - Masahisa Hasegawa
- Laboratorio de Productos Naturales, Escuela de Química, Facultad de Ciencias, Universidad Central de Venezuela. Apartado Postal 47102. Caracas, Venezuela
| | - Freddy González-Mujica
- Sección de Bioquímica Médica, Instituto de Medicina Experimental, Facultad de Medicina, Universidad Central de Venezuela. Apartado Postal 50587. Caracas, Venezuela
| | - Sandra Duque
- Sección de Bioquímica Médica, Instituto de Medicina Experimental, Facultad de Medicina, Universidad Central de Venezuela. Apartado Postal 50587. Caracas, Venezuela
| | - Yoichiro Ito
- Bioseparation Technology Laboratory, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, 10 Center drive, Building 10, Room 8N230, MD 20892-1762, USA
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Njock GBB, Bartholomeusz TA, Foroozandeh M, Pegnyemb DE, Christen P, Jeannerat D. NASCA-HMBC, a new NMR methodology for the resolution of severely overlapping signals: application to the study of agathisflavone. Phytochem Anal 2012; 23:126-130. [PMID: 21594945 DOI: 10.1002/pca.1333] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Revised: 03/30/2011] [Accepted: 03/30/2011] [Indexed: 05/30/2023]
Abstract
INTRODUCTION Standard NMR 2D heteronuclear HMBC spectra have a low resolution in the indirect carbon dimension, making it very difficult to assign signals to individual carbons when their chemical shifts are < 0.3 ppm apart. OBJECTIVE To establish spectral aliasing for HMBC experiments to improve the resolution in the carbon dimension without increasing the total experimental time and avoiding ambiguities in the observed chemical shifts. METHODOLOGY The NASCA-HMBC (Non-ambiguous Assignment by Superposition of Coupled Aliased HMBC) methodology combines a pair of HMBC spectra recorded with slightly different carbon windows to provide typically one order of magnitude increase in the resolution and unambiguous chemical shifts. RESULTS The application of this methodology to a biflavonoid found in Ouratea gilgiana resulted in spectra with a sufficiently high resolution to make the assignment straightforward and report, for the first time, the full assignment of agathisflavone. CONCLUSION The methodology should find many applications in dimeric and oligomeric compounds such as peptides, carbohydrates, polyketides and other cases where signal clustering is expected.
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Affiliation(s)
- Gaétan Bayiha Ba Njock
- Section of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Quai E. Ansermet 30, CH-1211 Geneva 4, Switzerland
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Ndongo JT, Shaaban M, Mbing JN, Bikobo DN, Atchadé ADT, Pegnyemb DE, Laatsch H. Phenolic dimers and an indole alkaloid from Campylospermum flavum (Ochnaceae). Phytochemistry 2010; 71:1872-1878. [PMID: 20822781 DOI: 10.1016/j.phytochem.2010.08.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2010] [Revised: 08/03/2010] [Accepted: 08/05/2010] [Indexed: 05/29/2023]
Abstract
From the leaves and stem bark of Campylospermum flavum (Ochnaceae), three compounds, namely 4‴-O-methylagathisflavone, flavumchalcone, and flavumindole have been isolated together with 10 known compounds, including three flavonoids, two biflavonoids, two alkaloids, two nitrile glucosides, and glucopyranosyl-β-sistosterol. The structures of these compounds and their relative configurations were established by 1D and 2D NMR experiments. The methanolic crude extracts of leaves and stem bark of C. flavum and compounds displayed a significant cytotoxicity towards Artemia salina larvae.
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Affiliation(s)
- Joseph Thierry Ndongo
- Department of Organic Chemistry, Faculty of Science, University of Yaounde I, P.O. Box 812 Yaounde, Cameroon
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10
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Abouem à Zintchem A, Bikobo DN, de Théodore Atchadé A, Mbing JN, Gangoue-Pieboji J, Tih RG, Blond A, Pegnyemb DE, Bodo B. Nitrile glucosides and serotobenine from Campylospermum glaucum and Ouratea turnarea. Phytochemistry 2008; 69:2209-2213. [PMID: 18550131 DOI: 10.1016/j.phytochem.2008.04.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2007] [Revised: 02/18/2008] [Accepted: 04/21/2008] [Indexed: 05/26/2023]
Abstract
Two nitrile glucosides (1S,3S,4S,5R)-4-benzoyloxy-2-cyanomethylene-3,5-dihydroxycyclohexyl-1-O-beta-glucopyranoside (campyloside A) and (1S,3S,4S,5R)-5-benzoyloxy-2-cyanomethylene-3-hydroxy-4-(2-pyrrolcarboxyloxy)cyclohexyl-1-O-beta-glucopyranoside (campyloside B) were isolated from the stem roots of Campylospermum glaucum, whereas serotobenine was isolated from Ouratea turnarea. The structure elucidations were based on spectroscopic evidence. The biological assays of compounds and crude extract of plant species showed good antimicrobial activity of crude extracts against Gram-positive cocci.
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Affiliation(s)
- Auguste Abouem à Zintchem
- Department of Organic Chemistry, Faculty of Science, University of Yaounde I, P.O. Box 812, Yaounde, Cameroon
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Ngo Mbing J, Enguehard-Gueiffier C, Atchadé ADT, Allouchi H, Gangoué-Piéboji J, Mbafor JT, Tih RG, Pothier J, Pegnyemb DE, Gueiffier A. Two biflavonoids from Ouratea nigroviolacea. Phytochemistry 2006; 67:2666-70. [PMID: 16950483 DOI: 10.1016/j.phytochem.2006.07.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2006] [Revised: 07/18/2006] [Accepted: 07/21/2006] [Indexed: 05/11/2023]
Abstract
The leaves of Ouratea nigroviolacea (Ochnaceae) afforded two biflavonoids, ouratine A and B together with agathisflavone and stigmasterol. The biflavonoids were characterized as 4'-O-methylated apigeninyl-(I-6, II-8)-4'-O-methylatedapigenin and 4'-O-methylated apigeninyl-(I-6, II-8) apigenin by spectral and chemical transformation studies.
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Affiliation(s)
- Josephine Ngo Mbing
- Department of Organic Chemistry, Faculty of Science, University of Yaounde I, P.O. Box 812, Yaounde, Cameroon
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Möller M, Suschke U, Nolkemper S, Schneele J, Distl M, Sporer F, Reichling J, Wink M. Antibacterial, antiviral, antiproliferative and apoptosis-inducing properties of Brackenridgea zanguebarica (Ochnaceae). J Pharm Pharmacol 2006; 58:1131-8. [PMID: 16872561 DOI: 10.1211/jpp.58.8.0015] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Brackenridgea zanguebarica is a small tree that is used in traditional African medicine as a type of cure-all for many diseases, including the treatment of wounds. The yellow bark of B. zanguebarica was used for the preparation of an ethanolic extract, which was tested in various concentrations against eleven bacteria, Herpes simplex virus type 1 (HSV-1) and different human tumour cell lines. The extract that contains different polyphenolic substances like calodenin B. Cell growth inhibition, assessed via MTT-assay, was found in all tested human cell lines with IC50 values (concentration of extract that reduced cell viability by 50%) between 33 microg dry extract/mL for HL-60 human myeloid leukaemia cells and 93 microg dry extract/mL for HaCaT human keratinocytes. Staining with Annexin-V-FLUOS and JC-1 followed by subsequent analysis via flow cytometry revealed significant apoptosis-inducing properties. Analysis of caspase activity using a fluorogenic caspase-3 substrate showed a significant caspase activity in Jurkat T-cells after incubation with the extract. The bark extract had a pronounced activity against free HSV-1 and a strong antibacterial activity against Gram-positive strains (MICs: 6-24 microg dry extract/mL), which are often involved in skin infections. Additionally, no irritating properties of the extract could be observed in hen-egg test chorioallantoic membrane (HET-CAM) assay. These findings give a rationale for the traditional use of B. zanguebarica and are a basis for further analysis of the plant's components, their biological activity, and its use in modern phytotherapy.
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Affiliation(s)
- Maren Möller
- Institut für Pharmazie und Molekulare Biotechnologie, Universität Heidelberg, Im Neuenheimer Feld 364, 69 120 Heidelberg, Germany
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Benedek B, Weniger B, Parejo I, Bastida J, Arango GJ, Lobstein A, Codina C. Antioxidant activity of isoflavones and biflavones isolated from Godoya antioquiensis. ACTA ACUST UNITED AC 2006; 56:661-4. [PMID: 17063642 DOI: 10.1055/s-0031-1296768] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Two biflavones, ochnaflavone (1) and 2",3"-dihydroochnaflavone (2), and two isoflavones, 5,7,4'-trihydroxy-3',5'-dimethoxyisoflavone (piscigenin) (3) and 5,4'-dihydroxy-7,3',5'-trimethoxyisoflavone (4), a new natural compound, were isolated from the leaves of Godoya antioquiensis (Ochnaceae). Their structures were determined on the basis of spectral data and by comparison with data reported in the literature. The isolated compounds were evaluated for their radical scavenging activity using the NBT (nitrobluetetrazolium)/hypoxanthine superoxide and the .OH/luminol chemiluminescence methods. The isolated isoflavones were found to exhibit a strong hydroxyl radical scavenging activity and a moderate inhibition of the superoxide anion, whereas the two biflavones were inactive in the superoxide anion assay and showed a low hydroxyl radical scavenging activity.
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Affiliation(s)
- Birgit Benedek
- Pharmacognosie et Molécules Naturelles Bioactives, UMR 7081, Faculté de Pharmacie, Université Louis Pasteur de Strasbourg, Illkirch, France
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Abstract
The leaves of the Cameroonian medicinal plant Lophira alata afforded two new biflavonoids, lophirone L (1) and lophirone M (2), and the known luteolin and lithospermoside. Both biflavonoids were obtained in small quantities, and their structures show some new and unusual biflavonoid diversity.
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Anuradha V, Srinivas PV, Rao RR, Manjulatha K, Purohit MG, Rao JM. Isolation and synthesis of analgesic and anti-inflammatory compounds from Ochna squarrosa L. Bioorg Med Chem 2006; 14:6820-6. [PMID: 16824764 DOI: 10.1016/j.bmc.2006.06.048] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2006] [Revised: 06/19/2006] [Accepted: 06/20/2006] [Indexed: 11/18/2022]
Abstract
Two new furanoflavonoids (1, 2), one new chalcone dimer (3) along with six known compounds, chrysophanol, 5-O-methyl squarrosin, 5-methoxy furano[4'',5'',6,7]flavone, calodenone, lophirone A and lophirone H were isolated from the ethyl acetate-soluble fraction of methanol extract of root bark of Ochna squarrosa. Chrysophanol, calodenone, lophirone A and lophirone H were isolated from this plant for the first time. The structures of all the isolated compounds were confirmed by 1D and 2D spectroscopic data. These compounds were tested for analgesic and anti-inflammatory activity. All the new compounds showed good analgesic and anti-inflammatory activity. A simple and facile method for the cleavage of benzyl ethers using I(2) in trigol is also reported.
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Affiliation(s)
- V Anuradha
- Natural Products Laboratory, Organic Division-I, Indian Institute of Chemical Technology, Hyderabad 500 007, India
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Ichino C, Kiyohara H, Soonthornchareonnon N, Chuakul W, Ishiyama A, Sekiguchi H, Namatame M, Otoguro K, Omura S, Yamada H. Antimalarial activity of biflavonoids from Ochna integerrima. Planta Med 2006; 72:611-4. [PMID: 16732520 DOI: 10.1055/s-2006-931569] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
During the screening of antimalarial substances, the 80% EtOH extract from the outer bark of Ochna integerrima Merr. (Ochnaceae) was shown to have a good anti-malarial activity (IC50 value: 6.5 microg/mL) whereas extracts from the inner barks of O.integerrima showed no antimalarial activity. Biflavanone (1), which had not been found previously from a natural plant source, was isolated as a potent antimalarial active ingredient (IC50 value: 80 ng/mL) from the extract of the outer barks. The stereoisomer of 1 ( = compound 2) was also isolated from this plant; however, its activity was significantly lower than that of 1.
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Affiliation(s)
- Chikara Ichino
- Kitasato Institute for Life Sciences, Kitasato University, Tokyo , Japan
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de Carvalho MG, do Rocha Gomes MS, Fernandes Pereira AH, de Souza Daniel JF, Schripsema J. Carbon-13 and proton NMR assignments of a new agathisflavone derivative. Magn Reson Chem 2006; 44:35-7. [PMID: 16259052 DOI: 10.1002/mrc.1720] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The (1)H and (13)C NMR spectra of 5-acetyl-7,4'-dimethoxyflavone-(6-8'')-5''-acetyl-7'',4'''-dimethoxyflavone, a new agathisflavone derivative, were completely assigned on the basis of 1D and 2D NMR techniques.
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Affiliation(s)
- Mario Geraldo de Carvalho
- Universidade Federal Rural do Rio de Janeiro, Departamento de Química, Br 465, Km. 07, CEP: 23980-000, Seropédica-RJ, Brazil.
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Pegnyemb DE, Mbing JN, de Théodore Atchadé A, Tih RG, Sondengam BL, Blond A, Bodo B. Antimicrobial biflavonoids from the aerial parts of Ouratea sulcata. Phytochemistry 2005; 66:1922-6. [PMID: 16083925 DOI: 10.1016/j.phytochem.2005.06.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2005] [Revised: 06/11/2005] [Accepted: 06/20/2005] [Indexed: 05/03/2023]
Abstract
Investigation of the aerial parts of Ouratea sulcata led to the isolation of a biflavonoid named sulcatone A, together with the known compounds, 3-hydroxy-2,3-dihydroapigenyl-[I-4',O,II-3']-dihydrokaempferol, amentoflavone, lophirone A, agathisflavone, stigmasterol and stigmasteryl-3-O-beta-D-glucopyranoside. The structure of the compound was assigned as apigenyl-[I-4',O,II-3']-dihydrokaempferol, by means of spectroscopic analysis. Sulcatone A and 3-hydroxy-2,3-dihydroapigenyl-[I-4',O,II-3']-dihydrokaempferol exhibited significant in vitro antimicrobial activities against a range of microorganisms.
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Affiliation(s)
- Dieudonné Emmanuel Pegnyemb
- Department of Organic Chemistry, Faculty of Science, University of Yaounde I, P.O. Box 812 Yaounde, Cameroon.
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