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Anywar GU, Kakudidi E, Oryem-Origa H, Schubert A, Jassoy C. Cytotoxicity of Medicinal Plant Species Used by Traditional Healers in Treating People Suffering From HIV/AIDS in Uganda. FRONTIERS IN TOXICOLOGY 2022; 4:832780. [PMID: 35586188 PMCID: PMC9108544 DOI: 10.3389/ftox.2022.832780] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 03/24/2022] [Indexed: 11/17/2022] Open
Abstract
Introduction: Many people living with HIV/AIDS (PLHIV) in Uganda widely use herbal medicines. However, their toxicity and safety have not been investigated. The use of these plants can potentially cause harmful effects to the health of patients. The purpose of this study was to determine the cytotoxicity of some commonly used medicinal plant species used by PLHIV. Methods: The cytotoxicity of the plant extracts was determined with the AlamarBlue cell viability assay using the human glioblastoma cell line U87.CD4.CXCR4. The cells were treated with varying concentrations of extracts of Warburgia ugandensis, Erythrina abyssinica, Cryptolepis sanguinolenta, Albizia coriaria, Psorospermum febrifugium, Gymnosporia senegalensis, Zanthoxylum chalybeum, Securidaca longipendunculata, Vachellia hockii, Gardenia ternifolia, and Bridelia micrantha reconstituted with ethanol and dimethyl sulfoxide (DMSO). Using regression analysis, the half maximal cytotoxic concentration (CC50) of the plant extracts were calculated from exponential curve fits, since they provided the highest coefficient of determination, R2. Results: The ethanol extracts of W. ugandensis (CC50 = 7.6 μg/ml) and A. coriaria (CC50 = 1.5 μg/ml) as well as the DMSO-reconstituted extracts of W. ugandensis (CC50 = 6.4 μg/ml) and A. coriria (CC50 = < 4 μg/ml) were highly cytotoxic. The cytotoxicity of W. ugandensis and A. coriaria compared well with the indigenous traditional knowledge of the toxic effects experienced when the plants were not used correctly. However, the cytotoxicity of most of the plant extracts (15/22) was low to moderate (CC50 = 21–200 μg/ml). Conclusion: Most of the plant species tested in this study had low to moderate cytotoxicity against U87.CD4.CXCR4 cells, except W. ugandensis and A. coriria which were highly cytotoxic.
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Affiliation(s)
- Godwin Upoki Anywar
- Department of Plant Sciences, Microbiology & Biotechnology, College of Natural Sciences, Makerere University, Kampala, Uganda
- Fraunhofer Institute for Cell Therapy & Immunology (IZI), Leipzig, Germany
- Institute for Medical Microbiology & Virology, University Clinics & Faculty of Medicine, University of Leipzig, Leipzig, Germany
- *Correspondence: Godwin Upoki Anywar, , ,
| | - Esezah Kakudidi
- Department of Plant Sciences, Microbiology & Biotechnology, College of Natural Sciences, Makerere University, Kampala, Uganda
| | - Hannington Oryem-Origa
- Department of Plant Sciences, Microbiology & Biotechnology, College of Natural Sciences, Makerere University, Kampala, Uganda
| | - Andreas Schubert
- Fraunhofer Institute for Cell Therapy & Immunology (IZI), Leipzig, Germany
| | - Christian Jassoy
- Institute for Medical Microbiology & Virology, University Clinics & Faculty of Medicine, University of Leipzig, Leipzig, Germany
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Anywar G, Kakudidi E, Byamukama R, Mukonzo J, Schubert A, Oryem-Origa H, Jassoy C. A Review of the Toxicity and Phytochemistry of Medicinal Plant Species Used by Herbalists in Treating People Living With HIV/AIDS in Uganda. Front Pharmacol 2021; 12:615147. [PMID: 33935707 PMCID: PMC8082237 DOI: 10.3389/fphar.2021.615147] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 02/18/2021] [Indexed: 01/14/2023] Open
Abstract
Introduction: Despite concerns about toxicity, potentially harmful effects and herb-drug interactions, the use of herbal medicines remains widely practiced by people living with HIV/AIDS (PLHIV) in Uganda. Objective: The objective of the paper was to comprehensively review the literature on the toxicity and chemical composition of commonly used medicinal plant species in treating PLHIV in Uganda. Methods: We reviewed relevant articles and books published over the last sixty years on ethnobotany, antiviral/anti-HIV activity, toxicity, phytochemistry of Vachellia hockii, Albizia coriaria, Bridelia micrantha, Cryptolepis sanguinolenta, Erythrina abyssinica, Gardenia ternifolia, Gymnosporia senegalensis, Psorospermum febrifugium, Securidaca longipendunculata, Warburgia ugandensis and Zanthoxylum chalybeum and their synonyms. We searched PubMed, Web of Science, Scopus, Science Direct and Google Scholar. Discussion: Most of the plant species reviewed apart from P. febrifugium, S. longipedunculata and C. sanguinolenta lacked detailed phytochemical analyses as well as the quantification and characterization of their constituents. Crude plant extracts were the most commonly used. However, purified/single component extracts from different plant parts were also used in some studies. The U87 human glioblastoma was the most commonly used cell line. Water, ethanol, methanol and DMSO were the commonest solvents used. In some instances, isolated purified compounds/extracts such as Cryptolepine and Psorospermin were used. Conclusion: Cytotoxicity varied with cell type, solvent and extract type used making it difficult for direct comparison of the plant species. Five of the eleven plant species namely, A. coriaria, C. sanguinolenta, G. ternifolia, P. febrifugium and Z. chalybeum had no cytotoxicity studies in animal models. For the remaining six plant species, the crude aqueous and ethanol extracts were mainly used in acute oral toxicity studies in mice. Herbalists reported only A. coriaria and W. ugandensis to cause toxic side effects in humans. However, selective cytotoxic plant extracts can potentially be beneficial as anticancer or anti-tumour drugs.
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Affiliation(s)
- G. Anywar
- Department of Plant Sciences, Microbiology and Biotechnology, College of Natural Sciences, Makerere University, Kampala, Uganda
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Leipzig, Germany
- Institute for Virology, University Clinics and Faculty of Medicine, University of Leipzig, Leipzig, Germany
| | - E. Kakudidi
- Department of Plant Sciences, Microbiology and Biotechnology, College of Natural Sciences, Makerere University, Kampala, Uganda
| | - R. Byamukama
- Department of Chemistry, College of Natural Sciences, Makerere University, Kampala, Uganda
| | - J. Mukonzo
- Department of Pharmacology and Therapeutics, College of Health Sciences, Makerere University, Kampala, Uganda
| | - A. Schubert
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Leipzig, Germany
| | - H. Oryem-Origa
- Department of Plant Sciences, Microbiology and Biotechnology, College of Natural Sciences, Makerere University, Kampala, Uganda
| | - C. Jassoy
- Institute for Virology, University Clinics and Faculty of Medicine, University of Leipzig, Leipzig, Germany
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Zhang Z, Fang S, Liu Q, Zhang G. Microwave-Assisted Facile Synthesis of Furo[3,2-b]indole Derivatives via Silver(I)-Mediated [3+2] Cycloaddition. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100767] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Nguyen HT, Lallemand MC, Boutefnouchet S, Michel S, Tillequin F. Antitumor psoropermum xanthones and sarcomelicope acridones: privileged structures implied in DNA alkylation. JOURNAL OF NATURAL PRODUCTS 2009; 72:527-539. [PMID: 19191562 DOI: 10.1021/np800644y] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Fused isopropylfuran and dimethylpyran units are privileged structures present in numerous bioactive natural products exemplified, in the field of anticancer drugs, by the furanoxanthone psorospermin and the pyranoacridone acronycine. Psorospermin binds to the N-7 position of the guanine units in the presence of topoisomerase II. In contrast, acronycine derivatives such as cis-1,2-diacetoxy-1,2-dihydrobenzo[b]acronycine alkylate the 2-amino group of DNA guanine residues in the minor groove. Hybrid compounds associating the acridone or benzo[b]acridone chromophore of acronycine derivatives and the epoxyfuran alkylating unit present in psorospermin also display very potent antiproliferative activities, alkylating DNA guanine units at position N-7 in the major groove, as natural xanthones belonging to the psorospermin series.
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Affiliation(s)
- Hung The Nguyen
- Laboratoire de Pharmacognosie de l'Universite Paris Descartes, UMR/CNRS 8638, 4 Avenue de l'Observatoire, F-75006 Paris, France
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Bérard D, Giroux MA, Racicot L, Sabot C, Canesi S. Intriguing formal [2+3] cycloaddition promoted by a hypervalent iodine reagent. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.05.114] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Lenta BN, Devkota KP, Ngouela S, Boyom FF, Naz Q, Choudhary MI, Tsamo E, Rosenthal PJ, Sewald N. Anti-plasmodial and Cholinesterase Inhibiting Activities of some Constituents of Psorospermum glaberrimum. Chem Pharm Bull (Tokyo) 2008; 56:222-6. [DOI: 10.1248/cpb.56.222] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Bruno Ndjakou Lenta
- Department of Chemistry, Organic and Bioorganic Chemistry, Bielefeld University
- Department of Chemistry, Higher Teachers' Training College, University of Yaoundé 1
| | - Krishna Prasad Devkota
- Department of Chemistry, Organic and Bioorganic Chemistry, Bielefeld University
- Institute of Forestry, Tribhuvan University
| | - Silvère Ngouela
- Department of Organic Chemistry, Faculty of Science, University of Yaoundé 1
| | | | - Quamar Naz
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi
| | - Muhammad Iqbal Choudhary
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi
| | - Etienne Tsamo
- Department of Organic Chemistry, Faculty of Science, University of Yaoundé 1
| | - Philip Jon Rosenthal
- Division of Infectious Diseases, Department of Medicine, University of California
| | - Norbert Sewald
- Department of Chemistry, Organic and Bioorganic Chemistry, Bielefeld University
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Jevric M, Taylor DK, Greatrex BW, Tiekink ER. DDQ induced oxidative cyclisations of 1,2-dihydronaptho[2,1-b]furans. Tetrahedron 2005. [DOI: 10.1016/j.tet.2004.12.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
This review, with 350 references, gives information on the chemical study of 234 naturally occurring tetraoxygenated xanthones in 12 families, 53 genus and 182 species of higher plants, and two which are described as fungal and lichen metabolites. The value of these groups of substances in connection with pharmacological activity and therapeutic use of some species is described. The structural formulas of 135 isolated compounds, and their distribution, are also given.
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Affiliation(s)
- V Peres
- Departamento de Química, Universidade Federal de Viçosa, Minas Gerais, Brazil
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