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Nisar N, Ajmal M, Hanif NQ, Hassan SW. Phytochemicals analysis and aflatoxin B 1 detoxification potential of leaves extract of Moringa oleifera and Calotropis procera. Nat Prod Res 2024:1-9. [PMID: 38625875 DOI: 10.1080/14786419.2024.2342003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 04/03/2024] [Indexed: 04/18/2024]
Abstract
The present study aimed to identify the presence of certain classes of phytochemicals in the leaf extract of medicinal herbs viz. Moringa oleifera and Calotropis procera, using qualitative detection tests and explored the potential of aqueous and ethanolic extract to inhibit aflatoxin production by thin layer chromatography at 25 °C and pH (7) of different incubation times i.e. 0-, 1-, 3-, 6- and 24-h. Qualitative phytochemical analysis reported that the aqueous leave extracts of M. oleifera and C. procera contained tannins, phlobatannins, quinones, steroids, sugar, betacyanins, fatty acids, phenols, and volatile oils. Aflatoxin analysis reported that the ethanolic extract of M. oleifera was found more effective than detoxifying 100% of AFB1 after 24 h of incubation. In the case of C. procera, the aqueous extract reduced 96.5% of AFB1 and ethanolic extract reduced 96% of AFB1 after 24-h of incubation. The results revealed that natural plant products have a high potential to reduce AFB1 and could contribute to mitigation plans for AFB1. There is a need for further characterisation using techniques such as GC-MS, LC-MS, or NMR which would provide valuable information on the chemical composition of the extracts.
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Affiliation(s)
- Nehrish Nisar
- Center of Integrative Conservation Macroevolution Group, Xishuangbanna Tropical Botanical Garden, UCAS, Mengla, China
| | - Maryam Ajmal
- Faculty of Sciences, Department of Botany, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan
| | - Nafeesa Qudsia Hanif
- University Institute of Biochemistry and Biotechnology (UIBB), Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan
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2
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GC-MS/MS Quantification of EGFR Inhibitors, β-Sitosterol, Betulinic Acid, (+) Eriodictyol, (+) Epipinoresinol, and Secoisolariciresinol, in Crude Extract and Ethyl Acetate Fraction of Thonningia sanguinea. Molecules 2022; 27:molecules27134109. [PMID: 35807354 PMCID: PMC9268025 DOI: 10.3390/molecules27134109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 06/16/2022] [Accepted: 06/21/2022] [Indexed: 11/17/2022] Open
Abstract
Medicinal plants are widely used in folk medicine to treat various diseases. Thonningia sanguinea Vahl is widespread in African traditional medicine, and exhibits antioxidant, antibacterial, antiviral, and anticancer activities. T. sanguinea is a source of phytomedicinal agents that have previously been isolated and structurally elucidated. Herein, gas chromatography combined with tandem mass spectrometry (GC-MS/MS) was used to quantify epipinoresinol, β-sitosterol, eriodictyol, betulinic acid, and secoisolariciresinol contents in the methanolic crude extract and its ethyl acetate fraction for the first time. The ethyl acetate fraction was rich in epipinoresinol, eriodictyol, and secoisolariciresinol at concentrations of 2.3, 3.9, and 2.4 mg/g of dry extract, respectively. The binding interactions of these compounds with the epidermal growth factor receptor (EGFR) were computed using a molecular docking study. The results revealed that the highest binding affinities for the EGFR signaling pathway were attributed to eriodictyol and secoisolariciresinol, with good binding energies of −19.93 and −16.63 Kcal/mol, respectively. These compounds formed good interactions with the key amino acid Met 769 as the co-crystallized ligand. So, the ethyl acetate fraction of T. sanguinea is a promising adjuvant therapy in cancer treatments.
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Makhuvele R, Naidu K, Gbashi S, Thipe VC, Adebo OA, Njobeh PB. The use of plant extracts and their phytochemicals for control of toxigenic fungi and mycotoxins. Heliyon 2020; 6:e05291. [PMID: 33134582 PMCID: PMC7586119 DOI: 10.1016/j.heliyon.2020.e05291] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 09/16/2020] [Accepted: 10/14/2020] [Indexed: 12/17/2022] Open
Abstract
Mycotoxins present a great concern to food safety and security due to their adverse health and socio-economic impacts. The necessity to formulate novel strategies that can mitigate the economic and health effects associated with mycotoxin contamination of food and feed commodities without any impact on public health, quality and nutritional value of food and feed, economy and trade industry become imperative. Various strategies have been adopted to mitigate mycotoxin contamination but often fall short of the required efficacy. One of the promising approaches is the use of bioactive plant components/metabolites synergistically with mycotoxin-absorbing components in order to limit exposure to these toxins and associated negative health effects. In particular, is the fabrication of β-cyclodextrin-based nanosponges encapsulated with bioactive compounds of plant origin to inhibit toxigenic fungi and decontaminate mycotoxins in food and feed without leaving any health and environmental hazard to the consumers. The present paper reviews the use of botanicals extracts and their phytochemicals coupled with β-cyclodextrin-based nanosponge technology to inhibit toxigenic fungal invasion and detoxify mycotoxins.
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Affiliation(s)
- Rhulani Makhuvele
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein Campus, Gauteng, 2028, South Africa
| | - Kayleen Naidu
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein Campus, Gauteng, 2028, South Africa
| | - Sefater Gbashi
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein Campus, Gauteng, 2028, South Africa
| | - Velaphi C Thipe
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein Campus, Gauteng, 2028, South Africa.,Laboratório de Ecotoxicologia - Centro de Química e Meio Ambiente - Instituto de Pesquisas Energéticas e Nucleares (IPEN) - Comissão Nacional de Energia Nuclear- IPEN/CNEN-SP, Av. Lineu Prestes, 2242 - Butantã, 05508-000, São Paulo, Brazil
| | - Oluwafemi A Adebo
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein Campus, Gauteng, 2028, South Africa
| | - Patrick B Njobeh
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein Campus, Gauteng, 2028, South Africa
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4
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Gulumian M, Yahaya ES, Steenkamp V. African Herbal Remedies with Antioxidant Activity: A Potential Resource Base for Wound Treatment. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2018; 2018:4089541. [PMID: 30595712 PMCID: PMC6282146 DOI: 10.1155/2018/4089541] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 10/23/2018] [Accepted: 11/07/2018] [Indexed: 12/21/2022]
Abstract
The use of traditional herbal remedies as alternative medicine plays an important role in Africa since it forms part of primary health care for treatment of various medical conditions, including wounds. Although physiological levels of free radicals are essential to the healing process, they are known to partly contribute to wound chronicity when in excess. Consequently, antioxidant therapy has been shown to facilitate healing of such wounds. Also, a growing body of evidence suggests that, at least, part of the therapeutic value of herbals may be explained by their antioxidant activity. This paper reviews African herbal remedies with antioxidant activity with the aim of indicating potential resources for wound treatment. Firstly, herbals with identified antioxidant compounds and, secondly, herbals with proven antioxidant activity, but where the compound(s) responsible for the activity has not yet been identified, are listed. In the latter case it has been attempted to ascribe the activity to a compound known to be present in the plant family and/or species, where related activity has previously been documented for another genus of the species. Also, the tests employed to assess antioxidant activity and the potential caveats thereof during assessment are briefly commented on.
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Affiliation(s)
- Mary Gulumian
- National Institute for Occupational Health, Johannesburg, South Africa
- Haematology and Molecular Medicine, University of the Witwatersrand, Johannesburg, South Africa
| | - Ewura Seidu Yahaya
- Department of Pharmacology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
- Department of Pharmacology, University of Cape Coast, Cape Coast, Ghana
| | - Vanessa Steenkamp
- Department of Pharmacology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
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5
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Abd El-Hack ME, Samak DH, Noreldin AE, El-Naggar K, Abdo M. Probiotics and plant-derived compounds as eco-friendly agents to inhibit microbial toxins in poultry feed: a comprehensive review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:31971-31986. [PMID: 30229484 DOI: 10.1007/s11356-018-3197-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 09/11/2018] [Indexed: 06/08/2023]
Abstract
Some of pathogenic bacteria and fungi have the ability to produce fetal toxins which may be the direct causes of cytotoxicity or cellular dysfunction in the colonization site. Biological and non-biological environmental factors, challenge and microbes influence the effect of toxins on these pathogens. Modern research mentions that many natural materials can reduce the production of toxins in pathogenic microbes. However, researches that explain the mechanical theories of their effects are meager. This review aimed to discuss the ameliorative potential role of plant-derived compounds and probiotics to reduce the toxin production of food-borne microbes either in poultry bodies or poultry feedstuff. Moreover, studies that highlight their own toxicological mechanisms have been discussed. Adding natural additives to feed has a clear positive effect on the enzymatic and microbiological appearance of the small intestine without any adverse effect on the liver. Studies in this respect were proposed to clarify the effects of these natural additives for feed. In conclusion, it could be suggested that the incorporation of probiotics, herbal extracts, and herbs in the poultry diets has some beneficial effects on productive performance, without a positive impact on economic efficiency. In addition, the use of these natural additives in feed has a useful impact on the microbiological appearance of the small intestine and do not have any adverse impacts on intestinal absorption or liver activity as evidenced by histological examination.
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Affiliation(s)
- Mohamed E Abd El-Hack
- Department of Poultry, Faculty of Agriculture, Zagazig University, Zagazig, 44511, Egypt.
| | - Dalia H Samak
- Department of Veterinary Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Damanhour University, Damanhour, Egypt
| | - Ahmed E Noreldin
- Department of Histology and Cytology, Faculty of Veterinary Medicine, Damanhour University, Damanhour, Egypt
| | - Karima El-Naggar
- Department of Nutrition and Veterinary Clinical Nutrition, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt
| | - Mohamed Abdo
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, University of Sadat City, Sadat, Egypt
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6
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Pompermaier L, Heiss EH, Alilou M, Mayr F, Monizi M, Lautenschlaeger T, Schuster D, Schwaiger S, Stuppner H. Dihydrochalcone Glucosides from the Subaerial Parts of Thonningia sanguinea and Their in Vitro PTP1B Inhibitory Activities. JOURNAL OF NATURAL PRODUCTS 2018; 81:2091-2100. [PMID: 30207720 DOI: 10.1021/acs.jnatprod.8b00450] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Six new and four known dihydrochalcone glucoside derivatives (1-10), the phenylpropanoid coniferin (11), and the lignans (+)-pinoresinol (12) and lariciresinol (13) were isolated from the subaerial plant parts of Thonningia sanguinea in the course of a screening campaign for new antidiabetic lead compounds. The structures of the new substances were elucidated by HRESIMS, NMR, GC-MS, and ECD data evaluation. 2'- O-(3-Galloyl-4,6- O- Sa-hexahydroxydiphenoyl-β-d-glucopyranosyl)-3-hydroxyphloretin (4), 2'- O-(4,6- O- Sa-hexahydroxydiphenoyl-β-d-glucopyranosyl)phloretin (5), 2'- O-(3- O-galloyl-4,6- O- Sa-hexahydroxydiphenoyl-β-d-glucopyranosyl)phloretin (6), and thonningianin B (9) showed moderate protein tyrosine phosphatase-1B inhibition in an enzyme assay (IC50 values ranging from 19 to 25 μM), whereas thonningianin A (10) was identified as a more potent inhibitor (IC50 = 4.4 μM). The observed activity differences could be explained by molecular docking experiments. The activity of 10 could further be confirmed in HEPG2 liver carcinoma cells, where the compound was able to increase the level of phosphorylated insulin receptors in a concentration-dependent manner.
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Affiliation(s)
- Luca Pompermaier
- Institute of Pharmacy/Pharmacognosy, Center for Molecular Biosciences Innsbruck , University of Innsbruck , Innrain 80/82 , Innsbruck 6020 , Austria
| | - Elke H Heiss
- Department of Pharmacognosy, Faculty of Life Sciences , University of Vienna , Althanstrasse 14 , Vienna 1090 , Austria
| | - Mostafa Alilou
- Institute of Pharmacy/Pharmacognosy, Center for Molecular Biosciences Innsbruck , University of Innsbruck , Innrain 80/82 , Innsbruck 6020 , Austria
| | - Fabian Mayr
- Institute of Pharmacy/Pharmacognosy, Center for Molecular Biosciences Innsbruck , University of Innsbruck , Innrain 80/82 , Innsbruck 6020 , Austria
- Institute of Pharmacy/Computer-aided Molecular Design Group, Center for Molecular Biosciences Innsbruck , University of Innsbruck , Innrain 80/82 , Innsbruck 6020 , Austria
| | - Mawunu Monizi
- Universidade Kimpa Vita , Province of Uíge, Rua Henrique Freitas No. 1, Bairro Popular , Uíge , Angola
| | - Thea Lautenschlaeger
- Department of Biology, Institute of Botany, Faculty of Science , Technische Universität Dresden , Zellescher Weg 20 , 01217 Dresden , Germany
| | - Daniela Schuster
- Institute of Pharmacy/Computer-aided Molecular Design Group, Center for Molecular Biosciences Innsbruck , University of Innsbruck , Innrain 80/82 , Innsbruck 6020 , Austria
- Department of Pharmaceutical and Medicinal Chemistry, Institute of Pharmacy , Paracelsus Medical University Salzburg , Strubergasse 21 , 5020 Salzburg , Austria
| | - Stefan Schwaiger
- Institute of Pharmacy/Pharmacognosy, Center for Molecular Biosciences Innsbruck , University of Innsbruck , Innrain 80/82 , Innsbruck 6020 , Austria
| | - Hermann Stuppner
- Institute of Pharmacy/Pharmacognosy, Center for Molecular Biosciences Innsbruck , University of Innsbruck , Innrain 80/82 , Innsbruck 6020 , Austria
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7
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Thomford AK, Ahmed Abdelhameed RF, Yamada K. Chemical studies on the parasitic plant Thonningia sanguinea Vahl. RSC Adv 2018; 8:21002-21011. [PMID: 35542344 PMCID: PMC9080861 DOI: 10.1039/c8ra03913e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 06/01/2018] [Indexed: 11/21/2022] Open
Abstract
A detailed first-time report on plant sterols and one flavanone characterized from Thonningia sanguinea provides significant evidence for its ethnomedicinal usage.
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Affiliation(s)
- Ama Kyeraa Thomford
- Graduate School of Biomedical Sciences
- Nagasaki University
- Nagasaki 852-8521
- Japan
- Department of Biomedical Sciences
| | | | - Koji Yamada
- Graduate School of Biomedical Sciences
- Nagasaki University
- Nagasaki 852-8521
- Japan
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8
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Bio-guided isolation of antioxidant compounds from Chrysophyllum perpulchrum, a plant used in the Ivory Coast pharmacopeia. Molecules 2010; 15:6386-98. [PMID: 20877230 PMCID: PMC6257705 DOI: 10.3390/molecules15096386] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Accepted: 08/25/2010] [Indexed: 11/17/2022] Open
Abstract
Chrysophyllum perpulchrum (Sapotaceae) is used in the traditional Ivory Coast pharmacopeia to cure fevers. The extract of C. perpulchrum used for this study was the powdered form obtained from the maceration of the dried plant bark in 96% methanol, followed by evaporation to dryness. In the present study, the antioxidative and radical-scavenging activities of the methanolic extract were studied with three standard biological tests: DPPH reduction, ferric thiocyanate (FTC) lipidic peroxidation inhibition and thiobarbituric acid reacting substances (TBARS). Gallic acid and quercetin were used as references. The total amount of phenolic compounds in the extract was determined by ultraviolet (UV) spectrometry and calculated as gallic acid equivalents. Catechin and two dimeric procyanidins were found to be the compounds responsible for the activities. They were chemically dereplicated in the extract by LC-MS. For quantitation purposes, they were isolated by successive chromatographic methods and characterized by mass spectrometry (MS) and nuclear magnetic resonance (NMR) spectrometry. The quantities of these compounds in C. perpulchrum were 5.4% for catechin (P1), and 5.6 and 9.2% for dimers (compounds 2 (P2) and 3 (P3)), respectively. They displayed antioxidant activity with IC(50) values of 2.50 ± 0.15 µg/mL (P1), 2.10 ± 0.2 µg/mL (P2) and 2.10 ± 0.1 µg/mL (P3). The total extract, the active fractions and the pure compounds inhibited the lipid peroxidation by the FTC method and the TBARS method in the range of 60%. These values were comparable to those seen for quercetin.
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9
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Ankrah NA, Nyarko AK, Addo PGA, Ofosuhene M, Dzokoto C, Marley E, Addae MM, Ekuban FA. Evaluation of efficacy and safety of a herbal medicine used for the treatment of malaria. Phytother Res 2003; 17:697-701. [PMID: 12820245 DOI: 10.1002/ptr.1196] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Resistance of Plasmodium falciparum to chloroquine has been reported in several countries. Other anti-malarial drugs in use are expensive and not readily accessible to most people in malaria endemic countries. This has led to renewed interest in the development of herbal medicines that have the potential to treat malaria with little or no side effects. This study obtained a preliminary information on the safety and effectiveness of a plant decoction (AM-1), used in treating malaria. The AM-1 is formulated from Jatropha curcas, Gossypium hirsutum, Physalis angulata and Delonix regia. Patients with suspected malaria attending a herbal clinic were enrolled in the study on voluntary basis. They were hospitalized for treatment, clinical observation, biochemical and haematological monitoring, and parasite clearance while on AM-1. In addition male and female Sprague Dawley rats were used to evaluate the acute and subchronic toxicity effects of AM-1. The AM-1 eliminated malaria parasites (Plasmodium falciparum and Plasmodium malarie) from the peripheral blood of patients with malaria. In addition the AM-1 did not show any undesired effects in the patients as well as in laboratory rats. The AM-1, however, showed differential effect on the activities of selected cytochrome P450 isozymes (7-pentoxyresorufin-O-depentylation, 7-ethoxyresorufin-O-deethylation and p-nitrophenol hydroxylase) in relation to sex of the laboratory rats. These results indicate that AM-1 could be used to treat malaria. However, it could precipitate interactions with other drugs via their biotransformation and elimination. The obtained data warrant further studies in a large number of malaria subjects with monitoring for possible drug interactions.
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Affiliation(s)
- Nii-Ayi Ankrah
- Noguchi Memorial Institute for Medical Research, Legon, Gana.
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10
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Shin HS, Kwon SK. Synthesis of allylthiopyridazine derivatives and inhibition of aflatoxin B1-induced hepatotoxicity in rats. Arch Pharm Res 2003; 26:351-7. [PMID: 12785730 DOI: 10.1007/bf02976691] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Five kinds of allylthiopyridazine derivatives were synthesized and their chemoprotective activities examined in rats exposed to aflatoxin B1-toxicant. Rats were pretreated with five allylthiopyridazine derivatives at daily oral doses of 50 mg/kg for 10 consecutive days, and during this period with one or three repeated doses of the potent hepatotoxin, aflatoxin B1. The hepatoprotective effects of the allylthiopyridazine derivatives against aflatoxin B1 (1 mg/kg, three times at intervals of 3 days, i.p., or at 3 mg/kg, once at final days, i.p.) administration were showed the significantly normal as compared with control in body and liver weights. Aspartate aminotransferase and alanine aminotransferase levels were markedly elevated after aflatoxin B1 administration, and pretreatment with allylthiopyridazine derivatives, before aflatoxin B1 administration, resulted in decreased levels of these enzymes. In addition, the allylthiopyridazine derivatives, K6 (3-methoxy-), K8 (3-chloro-), K16 (3-ethoxy-) and K17 (3-n-propoxy), induced elevated hepatic GSH levels. Four kinds of allylthiopyridazine derivatives investigated were effective against aflatoxin B1-induced hepatotoxicity.
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Affiliation(s)
- Hea-Soon Shin
- College of Pharmacy, Duksung Women's University, Seoul 132-714, Korea.
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11
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Gyamfi MA, Aniya Y. Antioxidant properties of Thonningianin A, isolated from the African medicinal herb, Thonningia sanguinea. Biochem Pharmacol 2002; 63:1725-37. [PMID: 12007576 DOI: 10.1016/s0006-2952(02)00915-2] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The antioxidant properties of Thonningianin A (Th A), an ellagitannin, isolated from the methanolic extract of the African medicinal herb, Thonningia sanguinea were studied using the NADPH and Fe2+/ascorbate-induced lipid peroxidation (LPO), electron spin resonance spectrometer and the deoxyribose assay. Th A at 10 microM inhibited both the NADPH and Fe2+/ascorbate-induced LPO in rat liver microsomes by 60% without inhibitory effects on cytochrome P450 activity. Th A was similar to the synthetic antioxidant, tannic acid, as an inhibitor of both the NADPH and Fe2+/ascorbate-induced LPO but potent than gallic acid, vitamin C and vitamin E. While Th A poorly scavenged the hydroxyl radical generated by the Fenton reaction it dose-dependently scavenged 1,1-diphenyl-2-picrylhydrazyl, superoxide anion and peroxyl radicals with IC50 of 7.5, 10 and 30 microM, respectively. Furthermore, Th A showed inhibitory effects on the activity of xanthine oxidase with an IC50 of 30 microM. In the deoxyribose assay both T. sanguinea and its methanolic component Th A showed only site-specific (Fe3+ + H2O2) but not non-site-specific (Fe3+ + EDTA + H2O2) hydroxyl radical scavenging suggesting chelating ability for iron ions. Spectroscopic studies showed that Th A enhanced absorbance in the visible region in the presence of Fe2+ ions. These results indicate that the antioxidant properties of Th A involve radical scavenging, anti-superoxide formation and metal chelation.
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Affiliation(s)
- Maxwell Afari Gyamfi
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, School of Health Sciences, University of the Ryukyus, Nishihara, Okinawa, Japan
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12
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Gyamfi MA, Hokama N, Oppong-Boachie K, Aniya Y. Inhibitory effects of the medicinal herb, Thonningia sanguinea, on liver drug metabolizing enzymes of rats. Hum Exp Toxicol 2000; 19:623-31. [PMID: 11211240 DOI: 10.1191/096032700667732543] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In this study we examined the effect of the aqueous extract of Thonningia sanguinea (T.S.) on 7-ethoxyresorufin O-deethylase (EROD, CYP1A1), 7-pentoxyresorufin O-dealkylase (PROD, CYP2B1/2), 7-methoxyresorufin O-demethylase (MROD, CYP1A2), aniline hydroxylase (aniline, CYP2E1), p-nitrophenol hydroxylase (PNPH, CYP2E1) and erythromycin N-demethylase (ERDM, CYP3A1) in rat liver in vitro and in vivo. Although T.S. extract increased ERDM activity in induced rat liver microsomes, it showed a dose-dependent inhibitory effect in vitro on other P450 monooxygenase activities particularly EROD and PROD, which are mediated primarily by CYP1A1 and CYP2B1/2, respectively. PROD, EROD and MROD activities were also decreased by 18%, 19% and 40%, respectively, in hepatic microsomes prepared from rats treated with T.S. extract for 3 days. Kinetic analysis of CYP activity of 3-methylchloranthrene-induced microsomes demonstrated that T.S. inhibited EROD and MROD activities by a noncompetitive and competitive mechanism, respectively. The analysis of alterations produced by T.S. on PROD kinetic parameters in phenobarbital-induced microsomes suggested that the inhibition is noncompetitive. Pretreatment of rats with T.S. prolonged pentobarbital and phenobarbital sleeping time; however, plasma phenobarbital concentration determined on awakening showed no significant difference between control and T.S.-treated rats. T.S. was also found to be a potent inhibitor of the liver cytosolic glutathione S-transferase. These data suggest that selective modulation of CYP isoenzymes by T.S. might contribute to protection of the liver from xenobiotic-induced intoxication or to alteration of the action of drug(s) concomitantly administered besides its antioxidative properties.
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Affiliation(s)
- M A Gyamfi
- Laboratory of Physiology and Pharmacology, School of Health Sciences, Faculty of Medicine, University of the Ryukyus, Nishihara, Okinawa, Japan
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13
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Ohtani II, Gotoh N, Tanaka J, Higa T, Gyamfi MA, Aniya Y. Thonningianins A and B, new antioxidants from the African medicinal herb Thonningia sanguinea. JOURNAL OF NATURAL PRODUCTS 2000; 63:676-679. [PMID: 10843586 DOI: 10.1021/np990396w] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Two new ellagitannins, thonningianins A (1) and B (2), have been isolated from the African medicinal herb Thonningia sanguinea and their structures elucidated by interpretation of spectroscopic data. Both 1 and 2 showed strong free radical scavenging activity against 1,1-diphenyl-2-picrylhydrazyl (DPPH) as shown by ESR analysis.
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Affiliation(s)
- I I Ohtani
- Department of Chemistry, Biology, and Marine Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan
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14
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Nyarko AK, Ankrah NA, Ofosuhene M, Sittie AA. Acute and subchronic evaluation of Indigofera arrecta: absence of both toxicity and modulation of selected cytochrome P450 isozymes in ddY mice. Phytother Res 1999; 13:686-8. [PMID: 10594940 DOI: 10.1002/(sici)1099-1573(199912)13:8<686::aid-ptr519>3.0.co;2-b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Indigofera arrecta, an anti diabetic plant was investigated in ddY mice to determine its acute and subchronic effects, and whether it modulated hepatic cytochrome P450 (CYP) isozymes and glutathione (GSH). No mortality was observed in the acute (up to 10 g I. arrecta/kg body wt, p.o.) and subchronic (2 g I. arrecta/kg body wt, p.o. daily for 30 days) studies. The extract did not alter haematological indices, serum and tissue lipids and glutathione but lowered serum bile acids. The latter phenomenon is under further investigation. Neither the duration of pentobarbital (PB) and zoxazolamine (ZA) effects in vivo, nor CYP-dependent 7-ethoxyresorufin-O-deethylase (EROD), 7-pentoxyresorufin-O-depentylase (PROD) and p-nitrophenol hydroxylase (PNPH) activities in vitro were altered by I. arrecta. The extract was thus devoid of overt acute and subchronic toxic effects, and did not affect CYPs and GSH whose modulation may cause interactions of components in a multiple drug therapy.
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Affiliation(s)
- A K Nyarko
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
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