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Gomes de Carvalho NK, Wellisson da Silva Mendes J, Martins da Costa JG. Quinones: Biosynthesis, Characterization of 13 C Spectroscopical Data and Pharmacological Activities. Chem Biodivers 2023; 20:e202301365. [PMID: 37926679 DOI: 10.1002/cbdv.202301365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 11/02/2023] [Accepted: 11/04/2023] [Indexed: 11/07/2023]
Abstract
Quinones are natural products widely distributed in nature, which are involved in stages of several vital biological processes, with mostly having a variety of pharmacological properties. The main groups comprising most of these compounds are benzoquinones, naphthoquinones, anthraquinones, and phenanthraquinones. Quinone isolation has been a focus of study around the world in recent years; for this reason, this study approaches the junction of natural quinones identified by 13 C Nuclear Magnetic Resonance (NMR) spectroscopic analytical techniques. The methodology used to obtain the data collected articles from various databases on quinones from 2000 to 2022. As a result, 137 compounds were selected, among which 70 were characterized for the first time in the period investigated; moreover, the study also discusses the biosynthetic pathways of quinones and the pharmacological activities of the compounds found, giving an overview of the various applications of these compounds.
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Affiliation(s)
- Natália Kelly Gomes de Carvalho
- Rede Nordeste de Biotecnologia - RENORBIO, Universidade Estadual do Ceará, Av. Dr. Silas Munguba, 1700 - Campus do Itaperi, 60714-903, Fortaleza, Ceará, Brasil
| | - Johnatan Wellisson da Silva Mendes
- Departamento de Química Biológica, Laboratório de Pesquisa de Produtos Naturais, Universidade Regional do Cariri, Rua Coronel Antônio Luíz, 1161 - Pimenta, 63105-010, Crato, Ceará, Brasil
| | - José Galberto Martins da Costa
- Rede Nordeste de Biotecnologia - RENORBIO, Universidade Estadual do Ceará, Av. Dr. Silas Munguba, 1700 - Campus do Itaperi, 60714-903, Fortaleza, Ceará, Brasil
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2
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Broni E, Striegel A, Ashley C, Sakyi PO, Peracha S, Velazquez M, Bebla K, Sodhi M, Kwofie SK, Ademokunwa A, Khan S, Miller WA. Molecular Docking and Dynamics Simulation Studies Predict Potential Anti-ADAR2 Inhibitors: Implications for the Treatment of Cancer, Neurological, Immunological and Infectious Diseases. Int J Mol Sci 2023; 24:6795. [PMID: 37047766 PMCID: PMC10095294 DOI: 10.3390/ijms24076795] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/01/2023] [Accepted: 04/04/2023] [Indexed: 04/08/2023] Open
Abstract
Altered RNA editing has been linked to several neurodevelopmental disorders, including autism spectrum disorder (ASD) and intellectual disability, in addition to depression, schizophrenia, some cancers, viral infections and autoimmune disorders. The human ADAR2 is a potential therapeutic target for managing these various disorders due to its crucial role in adenosine to inosine editing. This study applied consensus scoring to rank potential ADAR2 inhibitors after performing molecular docking with AutoDock Vina and Glide (Maestro), using a library of 35,161 compounds obtained from traditional Chinese medicine. A total of 47 compounds were predicted to be good binders of the human ADAR2 and had insignificant toxicity concerns. Molecular dynamics (MD) simulations, including the molecular mechanics Poisson-Boltzmann surface area (MM/PBSA) procedure, also emphasized the binding of the shortlisted compounds. The potential compounds had plausible binding free energies ranging from -81.304 to -1068.26 kJ/mol from the MM/PBSA calculations. ZINC000085511995, a naphthoquinone had more negative binding free energy (-1068.26 kJ/mol) than inositol hexakisphosphate (IHP) [-873.873 kJ/mol], an agonist and a strong binder of ADAR2. The potential displacement of IHP by ZINC000085511995 in the IHP binding site of ADAR2 could be explored for possible deactivation of ADAR2. Bayesian-based biological activity prediction corroborates the neuropharmacological, antineoplastic and antiviral activity of the potential lead compounds. All the potential lead compounds, except ZINC000014612330 and ZINC000013462928, were predicted to be inhibitors of various deaminases. The potential lead compounds also had probability of activity (Pa) > 0.442 and probability of inactivity (Pi) < 0.116 values for treating acute neurologic disorders, except for ZINC000085996580 and ZINC000013462928. Pursuing these compounds for their anti-ADAR2 activities holds a promising future, especially against neurological disorders, some cancers and viral infections caused by RNA viruses. Molecular interaction, hydrogen bond and per-residue decomposition analyses predicted Arg400, Arg401, Lys519, Trp687, Glu689, and Lys690 as hot-spot residues in the ADAR2 IHP binding site. Most of the top compounds were observed to have naphthoquinone, indole, furanocoumarin or benzofuran moieties. Serotonin and tryptophan, which are beneficial in digestive regulation, improving sleep cycle and mood, are indole derivatives. These chemical series may have the potential to treat neurological disorders, prion diseases, some cancers, specific viral infections, metabolic disorders and eating disorders through the disruption of ADAR2 pathways. A total of nine potential lead compounds were shortlisted as plausible modulators of ADAR2.
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Affiliation(s)
- Emmanuel Broni
- Department of Medicine, Loyola University Medical Center, Loyola University Chicago, Maywood, IL 60153, USA
| | - Andrew Striegel
- Department of Medicine, Loyola University Medical Center, Loyola University Chicago, Maywood, IL 60153, USA
- Department of Chemical and Biochemistry, College of Science, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Carolyn Ashley
- Department of Medicine, Loyola University Medical Center, Loyola University Chicago, Maywood, IL 60153, USA
| | - Patrick O. Sakyi
- Department of Chemistry, School of Physical and Mathematical Sciences, College of Basic and Applied Sciences, University of Ghana, Legon, Accra P.O. Box LG 56, Ghana
- Department of Chemical Sciences, School of Sciences, University of Energy and Natural Resources, Sunyani P.O. Box 214, Ghana
| | - Saqib Peracha
- Department of Medicine, Loyola University Medical Center, Loyola University Chicago, Maywood, IL 60153, USA
| | - Miriam Velazquez
- Department of Medicine, Loyola University Medical Center, Loyola University Chicago, Maywood, IL 60153, USA
- Department of Molecular Pharmacology & Neuroscience, Loyola University Medical Center, Loyola University Chicago, Maywood, IL 60153, USA
| | - Kristeen Bebla
- Department of Molecular Pharmacology & Neuroscience, Loyola University Medical Center, Loyola University Chicago, Maywood, IL 60153, USA
| | - Monsheel Sodhi
- Department of Molecular Pharmacology & Neuroscience, Loyola University Medical Center, Loyola University Chicago, Maywood, IL 60153, USA
| | - Samuel K. Kwofie
- Department of Biomedical Engineering, School of Engineering Sciences, College of Basic & Applied Sciences, University of Ghana, Legon, Accra P.O. Box LG 77, Ghana
- Department of Biochemistry, Cell and Molecular Biology, West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Accra P.O. Box LG 54, Ghana
| | - Adesanya Ademokunwa
- Department of Medicine, Loyola University Medical Center, Loyola University Chicago, Maywood, IL 60153, USA
- Department of Cognitive and Behavioral Neuroscience, Loyola University Chicago, Chicago, IL 60660, USA
| | - Sufia Khan
- Department of Medicine, Loyola University Medical Center, Loyola University Chicago, Maywood, IL 60153, USA
- Department of Biology, Loyola University Chicago, Chicago, IL 60660, USA
| | - Whelton A. Miller
- Department of Medicine, Loyola University Medical Center, Loyola University Chicago, Maywood, IL 60153, USA
- Department of Molecular Pharmacology & Neuroscience, Loyola University Medical Center, Loyola University Chicago, Maywood, IL 60153, USA
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Lozynskyi A, Senkiv J, Ivasechko I, Finiuk N, Klyuchivska O, Kashchak N, Lesyk D, Karkhut A, Polovkovych S, Levytska O, Karpenko O, Boshkayeva A, Sayakova G, Gzella A, Stoika R, Lesyk R. 1,4-Naphthoquinone Motif in the Synthesis of New Thiopyrano[2,3-d]thiazoles as Potential Biologically Active Compounds. Molecules 2022; 27:molecules27217575. [PMID: 36364402 PMCID: PMC9658586 DOI: 10.3390/molecules27217575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 10/31/2022] [Accepted: 11/02/2022] [Indexed: 11/09/2022] Open
Abstract
A series of 11-substituted 3,5,10,11-tetrahydro-2H-benzo[6,7]thiochromeno[2,3-d][1,3]thiazole-2,5,10-triones were obtained via hetero-Diels-Alder reaction of 5-alkyl/arylallylidene/-4-thioxo-2-thiazolidinones and 1,4-naphthoquinones. The structures of newly synthesized compounds were established by spectral data and a single-crystal X-ray diffraction analysis. According to U.S. NCI protocols, compounds 3.5 and 3.6 were screened for their anticancer activity; 11-Phenethyl-3,11-dihydro-2H-benzo[6,7]thiochromeno[2,3-d]thiazole-2,5,10-trione (3.6) showed pronounced cytotoxic effect on leukemia (Jurkat, THP-1), epidermoid (KB3-1, KBC-1), and colon (HCT116wt, HCT116 p53-/-) cell lines. The cytotoxic action of 3.6 on p53-deficient colon carcinoma cells was two times weaker than on HCT116wt, and it may be an interesting feature of the mechanism action.
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Affiliation(s)
- Andrii Lozynskyi
- Department of Pharmaceutical, Organic and Bioorganic Chemistry, Danylo Halytsky Lviv National Medical University, Pekarska 69, 79010 Lviv, Ukraine
| | - Julia Senkiv
- Institute of Cell Biology of National Academy of Sciences of Ukraine, Drahomanov14/16, 79005 Lviv, Ukraine
| | - Iryna Ivasechko
- Institute of Cell Biology of National Academy of Sciences of Ukraine, Drahomanov14/16, 79005 Lviv, Ukraine
| | - Nataliya Finiuk
- Institute of Cell Biology of National Academy of Sciences of Ukraine, Drahomanov14/16, 79005 Lviv, Ukraine
| | - Olga Klyuchivska
- Institute of Cell Biology of National Academy of Sciences of Ukraine, Drahomanov14/16, 79005 Lviv, Ukraine
| | - Nataliya Kashchak
- Institute of Cell Biology of National Academy of Sciences of Ukraine, Drahomanov14/16, 79005 Lviv, Ukraine
| | - Danylo Lesyk
- Department of Pharmaceutical, Organic and Bioorganic Chemistry, Danylo Halytsky Lviv National Medical University, Pekarska 69, 79010 Lviv, Ukraine
| | - Andriy Karkhut
- Department of Technology of Biologically Active Substances, Pharmacy and Biotechnology, Lviv Polytechnic National University, Bandera 12, 79013 Lviv, Ukraine
| | - Svyatoslav Polovkovych
- Department of Technology of Biologically Active Substances, Pharmacy and Biotechnology, Lviv Polytechnic National University, Bandera 12, 79013 Lviv, Ukraine
| | - Oksana Levytska
- Department of Organization and Economics of Pharmacy, Danylo Halytsky Lviv National Medical University, Pekarska 69, 79010 Lviv, Ukraine
| | | | - Assyl Boshkayeva
- Department of Pharmaceutical and Toxicological Chemistry, Pharmacognosy and Botany, Asfendiyarov Kazakh National Medical University, Almaty 050000, Kazakhstan
| | - Galiya Sayakova
- Department of Pharmaceutical and Toxicological Chemistry, Pharmacognosy and Botany, Asfendiyarov Kazakh National Medical University, Almaty 050000, Kazakhstan
| | - Andrzej Gzella
- Department of Organic Chemistry, Poznan University of Medical Sciences, Grunwaldzka 6, 60-780 Poznan, Poland
| | - Rostyslav Stoika
- Institute of Cell Biology of National Academy of Sciences of Ukraine, Drahomanov14/16, 79005 Lviv, Ukraine
| | - Roman Lesyk
- Department of Pharmaceutical, Organic and Bioorganic Chemistry, Danylo Halytsky Lviv National Medical University, Pekarska 69, 79010 Lviv, Ukraine
- Department of Biotechnology and Cell Biology, Medical College, University of Information Technology and Management in Rzeszow, Sucharskiego 2, 35-225 Rzeszow, Poland
- Correspondence: ; Tel.: +380-677-038-010
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Tajuddeen N, Swart T, Hoppe HC, van Heerden FR. Phytochemical, Antiplasmodial, and Cytotoxic Investigation of Euclea natalensis A.DC. subsp. natalensis Leaves. Chem Biodivers 2022; 19:e202200150. [PMID: 36253138 DOI: 10.1002/cbdv.202200150] [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: 04/13/2022] [Accepted: 09/21/2022] [Indexed: 11/12/2022]
Abstract
Previous research shows that the root and bark extracts of Euclea natalensis have antiplasmodial activity, but the leaves have not been examined yet. This study investigated the phytochemical, antiplasmodial, and cytotoxic properties of the plant leaves. The activity against 3D7 Plasmodium falciparum was determined using the parasite lactate dehydrogenase assay, and the cytotoxicity against Vero and HeLa cells was evaluated using the MTT and resazurin assays, respectively. The bioactive compounds were isolated by chromatography, and their structures were established with spectroscopic and spectrometric techniques. The extract showed antiplasmodial activity (IC50 =25.6 μg/mL) and was not cytotoxic against Vero cells (IC50 =403.7 μg/mL). Purification of the extract afforded six flavonoid glycosides, four triterpenoids, and a coumarin. The glycosides showed antiplasmodial and cytotoxic activities, against HeLa cells, at 50 μg/mL, but the activity was reduced at 10 μg/mL. Naphthoquinones, which are among the predominant phytochemicals in the root and root bark of E. natalensis, were not detected in the leaves.
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Affiliation(s)
- Nasir Tajuddeen
- School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X01, Scottsville, 3209, Pietermaritzburg, South Africa
| | - Tarryn Swart
- Department of Biochemistry and Microbiology, Rhodes University, Grahamstown, 6140, South Africa
| | - Heinrich C Hoppe
- Department of Biochemistry and Microbiology, Rhodes University, Grahamstown, 6140, South Africa
| | - Fanie R van Heerden
- School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X01, Scottsville, 3209, Pietermaritzburg, South Africa
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Bakery HH, Allam GA, Abuelsaad ASA, Abdel‐Latif M, Elkenawy AE, Khalil RG. Anti‐inflammatory, antioxidant, anti‐fibrotic, and schistosomicidal properties of plumbagin in murine schistosomiasis. Parasite Immunol 2022; 44:e12945. [DOI: 10.1111/pim.12945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 08/01/2022] [Accepted: 08/08/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Heba H. Bakery
- Immunology Divisions, Zoology Department Faculty of Science, Beni‐Suef University Beni‐Suef Egypt
| | - Gamal A. Allam
- Immunology Divisions, Zoology Department Faculty of Science, Beni‐Suef University Beni‐Suef Egypt
| | | | - Mahmoud Abdel‐Latif
- Immunology Divisions, Zoology Department Faculty of Science, Beni‐Suef University Beni‐Suef Egypt
| | - Ayman E. Elkenawy
- Department of Pathology College of Medicine, Taif University, P.O. Box 11099 Taif Saudi Arabia
- Department of Molecular Biology, GEBRI University of Sadat City Sadat City Egypt
| | - Rehab G. Khalil
- Immunology Divisions, Zoology Department Faculty of Science, Beni‐Suef University Beni‐Suef Egypt
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Yadav R, Darakshan, Bhaumick P, Choudhury LH, Parvin T. Synthesis of Pentacyclic Pyran Fused Pyrazolo Benzo[
h
]quinolines by Multicomponent Reaction and Their Photophysical Studies. ChemistrySelect 2022. [DOI: 10.1002/slct.202104124] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Rahul Yadav
- Department of Chemistry National Institute of Technology Patna Ashok Rajpath Patna 800 005 India
| | - Darakshan
- Department of Chemistry National Institute of Technology Patna Ashok Rajpath Patna 800 005 India
| | - Prabhas Bhaumick
- Department of Chemistry Indian Institute of Technology Patna Bihta Patna 801106 India
| | - Lokman H. Choudhury
- Department of Chemistry Indian Institute of Technology Patna Bihta Patna 801106 India
| | - Tasneem Parvin
- Department of Chemistry National Institute of Technology Patna Ashok Rajpath Patna 800 005 India
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Selaković Ž, Nikolić AM, Ajdačić V, Opsenica IM. Application of Transition Metal‐Catalyzed Decarbonylation of Aldehydes in the Total Synthesis of Natural Products. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Života Selaković
- Department of Organic Chemistry University of Belgrade – Faculty of Chemistry PO Box 51, Studentski trg 16 11158 Belgrade Serbia
| | - Andrea M. Nikolić
- Department of Organic Chemistry University of Belgrade – Faculty of Chemistry PO Box 51, Studentski trg 16 11158 Belgrade Serbia
| | - Vladimir Ajdačić
- Innovative Centre Faculty of Chemistry, Ltd. Studentski trg 12–16 11158 Belgrade Serbia
| | - Igor M. Opsenica
- Department of Organic Chemistry University of Belgrade – Faculty of Chemistry PO Box 51, Studentski trg 16 11158 Belgrade Serbia
- Department of Organic Chemistry University of Belgrade – Faculty of Chemistry PO Box 51, Studentski trg 16 11158 Belgrade Serbia
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8
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Wangso H, Laya A, Leutcha PB, Koubala BB, Laurent S, Henoumont C, Talla E. Antibacterial and antioxidant activities and phytochemical composition of Stereospermum kunthianum root bark. Nat Prod Res 2021; 36:5665-5675. [PMID: 34933618 DOI: 10.1080/14786419.2021.2019730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
A new glycoiridoid (1) together with seven (7) known compounds were isolated from the methanol crude extract of the root bark of Stereospermum kunthianum using chromatography methods. Their structures were elucidated using HR-ESI-MS, 1 D- & 2 D-NMR spectroscopies in comparison with previous literature. The antioxidant activity was investigated by using FRAP, DPPH, ABTS and HRSA methods while the antibacterial activity was assays on Escherichia coli (ATCC25922) and Salmonella typhimurium (ATCC14028) strains. The results showed that the isolated compounds had significantly (p < 0.01) high radical scavenging (IC50) and reducing power activity. All bacteria strains showed important minimal inhibitory concentration activity against isolated compounds started at 5 mg/mL with an inhibition zone of 6 mm. Thus, the isolated compounds in S. kunthianum justify the use of the plant in traditional medicine for the treatment of various diseases in humans. These isolated compounds can be used for formulation of new drug discovery to treat infectious diseases.
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Affiliation(s)
- Honoré Wangso
- Department of Chemistry, Faculty of Science, University of Maroua, Maroua, Cameroon
| | - Alphonse Laya
- Department of Chemistry, Faculty of Science, University of Maroua, Maroua, Cameroon.,Department of Biological Sciences, Faculty of Science, University of Maroua, Maroua, Cameroon
| | - Peron Bosco Leutcha
- Department of Chemistry, Faculty of Science, University of Maroua, Maroua, Cameroon
| | - Benoît Bargui Koubala
- Department of Life and Earth Sciences, Higher Teacher's Training College of Maroua, University of Maroua, Maroua, Cameroon.,Department of Biological Sciences, Faculty of Science, University of Maroua, Maroua, Cameroon
| | - Sophie Laurent
- Department of General, Organic Chemistry and Biomedical, Laboratory of NMR and molecular Imaging, University of Mons, Mons, Belgium
| | - Celine Henoumont
- Department of General, Organic Chemistry and Biomedical, Laboratory of NMR and molecular Imaging, University of Mons, Mons, Belgium
| | - Emmanuel Talla
- Department of Chemistry, Faculty of Science, University of Ngaounere, Ngaoundere, Cameroon
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Manuel L, Bechel A, Noormahomed EV, Hlashwayo DF, Madureira MDC. Ethnobotanical study of plants used by the traditional healers to treat malaria in Mogovolas district, northern Mozambique. Heliyon 2020; 6:e05746. [PMID: 33364508 PMCID: PMC7753128 DOI: 10.1016/j.heliyon.2020.e05746] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 11/24/2020] [Accepted: 12/11/2020] [Indexed: 01/01/2023] Open
Abstract
INTRODUCTION Malaria is an important parasitic disease that affects mostly the African continent. Traditional medicine is very important in Mozambique and traditional healers play a key role in the primary health care services, particularly in rural areas. We aim to report the results of an ethnobotanical survey undertaken in Mogovolas district, northern region of Mozambique. We recorded and identified the medicinal plants used by traditional healers for treatment of malaria, as well as the mode of preparation and administration. METHODS The study was conducted in 14 villages from Mogovolas between June and August 2015. Sixteen traditional healers were interviewed using semi-structured questionnaires. Under their guidance, we collected medicinal plants and prepared herbarium specimens that were sent and kept at Eduardo Mondlane University Herbarium for scientific identification. We searched for information on the in vitro and in vivo studies of the cited plants for antiplasmodial activity. RESULTS Traditional healers from Mogovolas district reported the use of 37 plants to treat malaria, belonging to 22 families. The most used species are Ochna kirkii Oliv. (5 citations), Ehretia amoena Klotzsch and Pteleopsis myrtifolia (M.A.Lawson) Engl. & Diels (both with 3 citations). These plants belong to Ochnaceae, Boraginaceae and Combretaceae families, respectively. The herbal remedies are prepared using leaves (22/37), roots (18/37), stem barks (16/37) and stems (3/37). The administration of the herbal remedies was made essentially by oral route and bathing. CONCLUSION The ethnobotanical data resulted from this study can be the starting point for further chemical and pharmacological studies aiming to identify medicinal species with antimalarial activity, thus, open the insights for the discovery of new antimalarial substances, as well as better integration of the traditional medicine into the national health systems, particularly in developing countries, as the health system coverage is limited.
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Affiliation(s)
- Leonardo Manuel
- Faculty of Health Sciences, Lúrio University, Nampula, Mozambique
| | - Aurélio Bechel
- Department of Biological Sciences, Faculty of Sciences, Eduardo Mondlane University, Maputo, Mozambique
| | - Emília Virgínia Noormahomed
- Department of Microbiology, Faculty of Medicine, Eduardo Mondlane University, Maputo, Mozambique,Mozambique Institute for Health Education and Research (MIHER), Maputo, Mozambique,Department of Medicine, Infectious Disease Division, University of California, San Diego, USA
| | - Delfina Fernandes Hlashwayo
- Department of Biological Sciences, Faculty of Sciences, Eduardo Mondlane University, Maputo, Mozambique,Corresponding author.
| | - Maria do Céu Madureira
- CFE, Centre for Functional Ecology - Science for People & the Planet, Department of Life Sciences, University of Coimbra, Portugal
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10
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Medicinal plants used by traditional medicine practitioners to boost the immune system in people living with HIV/AIDS in Uganda. Eur J Integr Med 2020. [DOI: 10.1016/j.eujim.2019.101011] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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11
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Leutcha BP, Sema DK, Dzoyem JP, Ayimele GA, Nyongbela KD, Delie F, Alléman É, Sewald N, Meli Lannang A. Cytotoxicity of a new tirucallane derivative isolated from Stereospermum acuminatissimum K. Schum stem bark. Nat Prod Res 2020; 35:4417-4422. [DOI: 10.1080/14786419.2020.1723085] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Bosco Peron Leutcha
- Department of Chemistry, Faculty of Science, University of Maroua, Maroua, Cameroon
- Department of Chemistry, Higher Teachers’ Training College, University of Maroua, Maroua, Cameroon
| | - Denis Kehdinga Sema
- Department of Chemistry, Faculty of Science, University of Maroua, Maroua, Cameroon
- Department of Chemistry, Higher Teachers’ Training College, University of Maroua, Maroua, Cameroon
| | - Jean Paul Dzoyem
- Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Geneva, Switzerland
| | | | | | - Florence Delie
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Geneva, Switzerland
| | - Éric Alléman
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Geneva, Switzerland
| | - Norbert Sewald
- Department of Chemistry, Organic and Bioorganic Chemistry, Bielefeld University, Bielefeld, Germany
| | - Alain Meli Lannang
- Department of Chemistry, Higher Teachers’ Training College, University of Maroua, Maroua, Cameroon
- Department of Chemistry, Organic and Bioorganic Chemistry, Bielefeld University, Bielefeld, Germany
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12
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Saigal, Irfan M, Khan P, Abid M, Khan MM. Design, Synthesis, and Biological Evaluation of Novel Fused Spiro-4 H-Pyran Derivatives as Bacterial Biofilm Disruptor. ACS OMEGA 2019; 4:16794-16807. [PMID: 31646225 PMCID: PMC6796888 DOI: 10.1021/acsomega.9b01571] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 09/13/2019] [Indexed: 10/07/2023]
Abstract
This study aims to synthesize novel fused spiro-4H-pyran derivatives under green conditions to develop agents having antimicrobial activity. The synthesized compounds were initially screened for in vitro antibacterial activity against two Gram-positive and three Gram-negative bacterial strains, and all the compounds exhibited moderate to potent antibacterial activity. However, compound 4l showed significant inhibition toward all the bacterial strains, particularly against Streptococcus pneumoniae and Escherichia coli with minimum inhibitory concentration values of 125 μg/mL for each. The toxicity studies of selected compounds (4c, 4e, 4l, and 4m) using human red blood cells as well as human embryonic kidney (HEK-293) cells showed nontoxic behavior at desired concentration. Growth kinetic and time-kill curve studies of 4l against S. pneumoniae and E. coli supported its bactericidal nature. Interestingly, compound 4l showed a synergistic effect when used in combination with ciprofloxacin against selected strains. Biofilm formation in the presence of a lead compound, as assessed by XTT assay, showed complete disruption of the bacterial biofilm visualized by scanning electron microscopy. Overall, the findings suggest 4l to be considered as a promising lead for further development as an antibacterial agent.
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Affiliation(s)
- Saigal
- Department
of Chemistry, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India
| | - Mohammad Irfan
- Department of Biosciences and Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Parvez Khan
- Department of Biosciences and Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Mohammad Abid
- Department of Biosciences and Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Md. Musawwer Khan
- Department
of Chemistry, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India
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Li Y, Jiang JG. Health functions and structure-activity relationships of natural anthraquinones from plants. Food Funct 2019; 9:6063-6080. [PMID: 30484455 DOI: 10.1039/c8fo01569d] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Anthraquinone compounds with the anthraquinone ring structure are widely found in traditional Chinese medicines and they are attracting a lot of attention due to their good pharmacological activity. Diversities of anthraquinones depend on their chemical structures, such as the number of anthraquinone rings and the substituents; what's more, the difference in chemical structure determines the difference in physiological activity. Based on results of previous studies, this review summarizes several natural anthraquinones identified from Chinese herbal medicines and their physiological activities including anti-cancer, anti-pathogenic microorganisms, anti-inflammatory, anti-oxidation, anti-osteoporosis, anti-depression, and anti-constipation. The source, effect, model, and action mechanism of the active anthraquinones are described in detail, from which their structure-activity relationship is summarized. By analyzing the relationship between anthraquinone structure and function, we found that, on the whole structure, the anthraquinone ring and anthraquinone glycosides have significant anticancer activity and anti-constipation activity, while for their substituents, anthraquinones substituted by alizarin have significant antioxidant activity and the polarity of the substituents is closely related to their antibacterial activities.
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Affiliation(s)
- Yu Li
- College of Food and Bioengineering, South China University of Technology, Guangzhou, 510640, China.
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14
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Abstract
The paper is a compilation of the studies reported in the literature concerning non-nitrogenous natural constituents that have shown antiplasmodial activity and aims to provide a basis for further in vivo studies as well as for clinical trials to develop new antimalarial agents. Due to the increasingly unsatisfactory outcomes for N-heterocyclic drugs, coupled with the rising incidence of the deadly falciparum malaria, the advent of non-nitrogenous lead compounds is timely, signaling a new era of antimalarial chemotherapy. Currently a few non-nitrogenous molecules are used in therapy, but many promising molecules of plant origin are under study, such as peroxide sesquiterpenes, quinoid triterpenes, quassinoids, gallic acid derivatives, lignans, flavonoids and biflavonoids, xanthones, naphthoquinones and phenylanthraquinones. Many of these constituents are isolated from plants used traditionally to treat malaria and fever. Ethnopharmacology can still be considered as a rich source of lead molecules.
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Affiliation(s)
- Anna Rita Bilia
- Department of Pharmaceutical Sciences, University of Florence, via Ugo Schiff, 6, Sesto Fiorentino-50019-Florence, Italy
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15
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Tri Mai D, Nghia Ngo T, Ly Nguyen NT, Luan Ngo Q, Minh NP, Dat Bui T, Dang VS, Tran CL, Tuyen Pham NK, An Tran NM, Nguyen TP. Cytotoxic activity and phytochemical composition of Stereospermum binhchauensis V.S. Dang leaves. Nat Prod Res 2019; 35:641-645. [PMID: 30887819 DOI: 10.1080/14786419.2019.1585847] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
For the first time, the cytotoxic and phytochemical investigation of the leaves of Stereospermum binhchauensis V.S. Dang, a new species discovered in Viet Nam were finalized and led to purify nine compounds, including one furancoumarin (1), one chromone (3), two triterpenoids (2, 4), two flavonoids (5, 8), two flavanoids (6, 7) and one iridoid (9) using various chromatography methods. Their structures were verified by HR-ESI-MS, NMR experiments and compared with previous literatures. For the first time, compounds (5-8) were realized from the genus Stereospermum, while compounds (1, 2, 3, 4 & 9) were designated from the species S. binhchauensis. Furthermore, the furancoumarin, chromone and flavanoid classes were notified for the first time from the genus Stereospermum.
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Affiliation(s)
- Dinh Tri Mai
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam.,Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Trong Nghia Ngo
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam.,Kien Giang University, Kien Giang City, Vietnam
| | | | - Quoc Luan Ngo
- School of Education, Can Tho University, Can Tho City, Vietnam
| | - Nhat Phan Minh
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Trong Dat Bui
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Van Son Dang
- Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Cong Luan Tran
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam.,Tay Do University, Can Tho City, Vietnam
| | | | | | - Tan Phat Nguyen
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam.,Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
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Osman CP, Ismail NH, Widyawaruyanti A, Imran S, Tumewu L, Choo CY, Ideris S. Evaluation of a Series of 9,10-Anthraquinones as Antiplasmodial Agents. LETT DRUG DES DISCOV 2019. [DOI: 10.2174/1570180815666180607085102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background: A phytochemical study on medicinal plants used for the treatment of fever
and malaria in Africa yielded metabolites with potential antiplasmodial activity, many of which are
Anthraquinones (AQ). AQs have similar sub-structure as naphthoquinones and xanthones, which
were previously reported as novel antiplasmodial agents.
</P><P>
Objective: The present study aimed to investigate the structural requirements of 9,10-
anthraquinones with hydroxy, methoxy and methyl substituents to exert strong antiplasmodial activity
and to investigate their possible mode of action.
</P><P>
Methods: Thirty-one AQs were synthesized through Friedel-Crafts reaction and assayed for antiplasmodial
activity in vitro against Plasmodium falciparum (3D7). The selected compounds were
tested for toxicity and probed for their mode of action against β-hematin dimerization through
HRP2 and lipid catalyses. The most active compounds were subjected to a docking study using
AutoDock 4.2.
</P><P>
Results: The active AQs have similar common structural characteristics. However, it is difficult to
establish a structure-activity relationship as certain compounds are active despite the absence of the
structural features exhibited by other active AQs. They have either ortho- or meta-arranged
substituents and one free hydroxyl and/or carbonyl groups. When C-6 is substituted with a methyl
group, the activity of AQs generally increased. 1,3-DihydroxyAQ (15) showed good antiplasmodial
activity with an IC50 value of 1.08 µM, and when C-6 was substituted with a methyl group, 1,3-
dihydroxy-6-methylAQ (24) showed stronger antiplasmodial activity with an IC50 value of 0.02
µM, with better selectivity index. Compounds 15 and 24 showed strong HRP2 activity and mild
toxicity against hepatocyte cells. Molecular docking studies showed that the hydroxyl groups at the
ortho (23) and meta (24) positions are able to form hydrogen bonds with heme, of 3.49 Å and 3.02
Å, respectively.
</P><P>
Conclusion: The activity of 1,3-dihydroxy-6-methylAQ (24) could be due to their inhibition against
the free heme dimerization by inhibiting the HRP2 protein. It was further observed that the
anthraquinone moiety of compound 24 bind in parallel to the heme ring through hydrophobic interactions,
thus preventing crystallization of heme into hemozoin.
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Affiliation(s)
- Che Puteh Osman
- Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
| | - Nor Hadiani Ismail
- Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
| | - Aty Widyawaruyanti
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmacy, Universitas Airlangga, Surabaya 60286, Indonesia
| | - Syahrul Imran
- Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
| | - Lidya Tumewu
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmacy, Universitas Airlangga, Surabaya 60286, Indonesia
| | - Chee Yan Choo
- MedChem Herbal Research Group, Faculty of Pharmacy, Universiti Teknologi MARA, 42300 Bandar Puncak Alam, Selangor, Malaysia
| | - Sharinah Ideris
- MedChem Herbal Research Group, Faculty of Pharmacy, Universiti Teknologi MARA, 42300 Bandar Puncak Alam, Selangor, Malaysia
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Osman CP, Ismail NH. Antiplasmodial Anthraquinones from Medicinal Plants: The Chemistry and Possible Mode of Actions. Nat Prod Commun 2018. [DOI: 10.1177/1934578x1801301207] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Malaria killed nearly half a million people in 2015, and 70% of this victims were young children. Malarial chemotherapy makes use of several drugs, each with its own pharmacological limitations, and with parasite resistance being the most challenging. People of low income nations often rely on traditional medicine as a treatment due to limited access to modern healthcare services. Despite uncertainties present in the outcome of traditional medicine, ethnomedicine approach has yielded important lead candidates. The investigation of medicinal plants utilized in the malaria endemic region yielded many antiplasmodial compounds with anthraquinone moiety. This paper describes natural anthraquinones extracted from medicinal plants utilized in traditional medicine for the treatment of malaria. In addition, the insight on structure-activity relationship and their mode of actions are also elaborated.
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Affiliation(s)
- Che Puteh Osman
- Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
- Atta-ur Rahman Institute of Natural Product Discovery, Universiti Teknologi MARA Cawangan Selangor, 42300 Bandar Puncak Alam, Selangor, Malaysia
| | - Nor Hadiani Ismail
- Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
- Atta-ur Rahman Institute of Natural Product Discovery, Universiti Teknologi MARA Cawangan Selangor, 42300 Bandar Puncak Alam, Selangor, Malaysia
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18
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Upadhyay A, Singh VK, Dubey R, Kumar N, Sharma L, Singh RKP. Electrocatalytic one pot synthesis of medicinally relevant 4H-benzo[g]chromene and pyrano[2,3-g]chromene scaffold via multicomponent-domino approach. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.09.048] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Solvent-free synthesis of 4H-pyranonaphthoquinones using highly active and stable polymer-grafted layered double hydroxides (LDHs-g-POEGMA) as an efficient and reusable heterogeneous catalyst. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-017-3117-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Bello I, Shehu MW, Musa M, Zaini Asmawi M, Mahmud R. Kigelia africana (Lam.) Benth. (Sausage tree): Phytochemistry and pharmacological review of a quintessential African traditional medicinal plant. JOURNAL OF ETHNOPHARMACOLOGY 2016; 189:253-276. [PMID: 27220655 DOI: 10.1016/j.jep.2016.05.049] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 05/17/2016] [Accepted: 05/20/2016] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Kigelia africana is a quintessential African herbal medicinal plant with a pan-African distribution and immense indigenous medicinal and non-medicinal applications. The plant is use traditionally as a remedy for numerous disease such as use wounds healing, rheumatism, psoriasis, diarrhea and stomach ailments. It is also use as an aphrodisiac and for skin care. AIM OF THE REVIEW The present review aims to compile an up-to-date review of the progress made in the continuous pharmacological and phytochemistry investigation of K. africana and the corresponding commercial and pharmaceutical application of these findings with the ultimate objective of providing a guide for future research on this plant. METHOD The scholarly information needed for this paper were predominantly sourced from the electronic search engines such as Google, Google scholar; publishing sites such as Elsevier, scienceDirect, BMC, PubMed; other scientific database sites for chemicals such as ChemSpider, PubChem, and also from online books. RESULTS Pharmacological investigations conducted confirm the anti-inflammatory, analgesic, antioxidant and anticancer activity of the extract of different parts of the plant. Bioactive constituents are found to be present in all parts of the plant. So far, approximately 150 compounds have been characterized from different part of the plant. Iridoids, naphthoquinones, flavonoids, terpenes and phenylethanoglycosides are the major class of compounds isolated. Novel compounds with potent antioxidant, antimicrobial and anticancer effect such as verbascoside, verminoside and pinnatal among others, have been identified. Commercial trade of K. africana has boosted in the las few decades. Its effect in the maintenance of skin has been recognized resulting in a handful of skin formulations in the market. CONCLUSIONS The pharmaceutical potentials of K. africana has been recognized and have witness a surge in research interest. However, till date, many of its traditional medicinal uses has not been investigated scientifically. Further probing of the existential researches on its pharmacological activity is recommended with the end-goal of unravelling the pharmacodynamics, pharmacokinetics, clinical relevance and possible toxicity and side effects of both the extract and the active ingredients isolated.
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Affiliation(s)
- Idris Bello
- Department of Pharmacology, School of Pharmaceutical Sciences, University Sains Malaysia, 11800 Pulau Pinang, Malaysia.
| | - Mustapha W Shehu
- Department of Environmental Science, Faculty of Science, Islamic University, Uganda
| | | | - Mohd Zaini Asmawi
- Department of Pharmacology, School of Pharmaceutical Sciences, University Sains Malaysia, 11800 Pulau Pinang, Malaysia
| | - Roziahanim Mahmud
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Sciences, Universiti Sains Malaysia (USM), 11800 Pulau Pinang, Malaysia
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21
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Kaya U, Chauhan P, Hack D, Deckers K, Puttreddy R, Rissanen K, Enders D. Enantioselective synthesis of 4H-pyranonaphthoquinones via sequential squaramide and silver catalysis. Chem Commun (Camb) 2016; 52:1669-72. [DOI: 10.1039/c5cc09592a] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An enantioselective Michael addition/hydroalkoxylation reaction between 2-hydroxy-1,4-naphthoquinones and alkyne-tethered nitroalkenes catalysed by a cinchona-derived squaramide/silver(i) salt has been developed.
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Affiliation(s)
- Uğur Kaya
- Institute of Organic Chemistry, RWTH Aachen University
- 52074 Aachen
- Germany
| | - Pankaj Chauhan
- Institute of Organic Chemistry, RWTH Aachen University
- 52074 Aachen
- Germany
| | - Daniel Hack
- Institute of Organic Chemistry, RWTH Aachen University
- 52074 Aachen
- Germany
| | - Kristina Deckers
- Institute of Organic Chemistry, RWTH Aachen University
- 52074 Aachen
- Germany
| | - Rakesh Puttreddy
- Department of Chemistry
- University of Jyväskylä
- 40014 Jyväskylä
- Finland
| | - Kari Rissanen
- Department of Chemistry
- University of Jyväskylä
- 40014 Jyväskylä
- Finland
| | - Dieter Enders
- Institute of Organic Chemistry, RWTH Aachen University
- 52074 Aachen
- Germany
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22
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Bian J, Qian X, Wang N, Mu T, Li X, Sun H, Zhang L, You Q, Zhang X. Palladium(II)-Catalyzed C–H Bond Activation/C–C Coupling/Intramolecular Tsuji–Trost Reaction Cascade: Facile Access to 2H-Pyranonaphthoquinones. Org Lett 2015; 17:3410-3. [DOI: 10.1021/acs.orglett.5b01304] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jinlei Bian
- Jiangsu
Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China
| | - Xue Qian
- Jiangsu
Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China
| | - Nan Wang
- Jiangsu
Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China
| | - Tong Mu
- Jiangsu
Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China
| | - Xiang Li
- Jiangsu
Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China
| | - Haopeng Sun
- Jiangsu
Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China
| | - Lianshan Zhang
- National
Engineering
and Research Center for Target Drugs, Lianyungang, 222000, China
| | - Qidong You
- Jiangsu
Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China
- State
Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Xiaojin Zhang
- Jiangsu
Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China
- Department
of Organic Chemistry, School of Science, China Pharmaceutical University, Nanjing 210009, China
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23
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Duran Lengua M, Kamali AN, Cano AJ, Piermattey J, Reyes N, Bautista JM, Gaitan R. Synthetic alkyl substituted quinones oxidize membrane proteins and arrest Plasmodium falciparum growth in vitro. ACTA ACUST UNITED AC 2015. [DOI: 10.5897/ajpp2014.4257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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24
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Wahab Sab BA, Jacob J, Manjunath GG, Singh VK, Mundkinajeedu D, Shankarappa S. Cycloolivil, a lignan from the roots of Stereospermum suaveolens. Pharmacognosy Res 2015; 7:45-8. [PMID: 25598634 PMCID: PMC4285648 DOI: 10.4103/0974-8490.147198] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2014] [Revised: 07/13/2014] [Accepted: 12/17/2014] [Indexed: 11/21/2022] Open
Abstract
Background: Stereospermum suaveolens DC. (Syn. S. chelonoides) belonging to family Bignoniaceae is an important medicinal plant in India. Traditionally, it is mainly used as analgesic, liver stimulant, astringent, wound healing and antidyspeptic. Roots of this plant are one of the ingredients of Dashamularishta. The plant has been studied for many pharmacological actions, only few were concerned with isolation of active compounds. Objective: The present work deals with the isolation and identification of phytochemical constituents present in the roots of Stereospermum suaveolens. Material and Methods: The compounds were isolated from the ethyl acetate-soluble fraction from the methanol extract of S. suaveolens by using open silica gel column chromatography and HPLC was carried out for all the fractions to target the major peaks in fractions. Results and Conclusion: The isolated compounds structures were elucidated by analysis of spectroscopic data (UV, IR, 1D-NMR, and MS) and characterized as Cycloolivil (1) reported for the first time from this plant species, Lapachol (2) and β-sitosterol (3), respectively.
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Affiliation(s)
- B Abdul Wahab Sab
- Pharmacognosy, Government College of Pharmacy, Natural Remedies Pvt. Ltd. Bangalore, Karnataka, India
| | - Janani Jacob
- Department of Phytochemistry, Natural Remedies Pvt. Ltd. Bangalore, Karnataka, India
| | | | - Vineet Kumar Singh
- Department of Phytochemistry, Natural Remedies Pvt. Ltd. Bangalore, Karnataka, India
| | - Deepak Mundkinajeedu
- Department of Phytochemistry, Natural Remedies Pvt. Ltd. Bangalore, Karnataka, India
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25
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Yang X, Liang X, Yang L, Pan F, Deng F, Liu H. Novel Gas-assisted Three-liquid-phase Extraction System for Simultaneous Separation and Concentration of Anthraquinones in Herbal Extract. Chin J Chem Eng 2014. [DOI: 10.1016/j.cjche.2014.06.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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26
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Bugarin A, Martinez LE, Cooke P, Islam T, Noveron JC. Solid-phase organic synthesis of 2-tridecanyl-1,4-naphthoquinone and 2-tridecanyl-1,4-naphthodiol that form redox-active micelles and vesicles. Bioorg Chem 2014; 56:62-6. [PMID: 25036816 DOI: 10.1016/j.bioorg.2014.06.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2013] [Revised: 06/19/2014] [Accepted: 06/27/2014] [Indexed: 11/18/2022]
Abstract
The solid-phase synthesis of new amphiphilic compounds is reported. It is based on a newly designed 1,4-naphthoquinone derivative that contains polar and nonpolar groups and self-assembles into micelles or vesicles in water depending on the concentration. They also display redox-active properties.
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Affiliation(s)
- Alejandro Bugarin
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, TX 76019, USA.
| | - Luis E Martinez
- Department of Chemistry and Biochemistry, Trinity University, San Antonio, TX 78212, USA
| | - Peter Cooke
- CURRL, New Mexico State University, 945 College Dr., Las Cruces, NM 88003, USA
| | - Tadiqul Islam
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968, USA
| | - Juan C Noveron
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968, USA
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27
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Hook I, Mills C, Sheridan H. Bioactive Naphthoquinones from Higher Plants. STUDIES IN NATURAL PRODUCTS CHEMISTRY 2014. [DOI: 10.1016/b978-0-444-63294-4.00005-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Menna M, Aiello A, D'Aniello F, Imperatore C, Luciano P, Vitalone R, Irace C, Santamaria R. Conithiaquinones A and B, Tetracyclic Cytotoxic Meroterpenes from the Mediterranean AscidianAplidium conicum. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300260] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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29
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Malerich JP, Li J, Joder D, Vieria ÉLM, Keesen TSL, Vaidyanathan R, Gollob KJ, Tanga MJ. Antileishmanial Activity of Natural Product-Like Naphthoquinones. Drug Dev Res 2013. [DOI: 10.1002/ddr.21067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jeremiah P. Malerich
- SRI International; Center for Infectious Disease and Biodefense Research; 333 Ravenswood Avenue; Menlo Park; California; 94025; USA
| | - Jinfang Li
- SRI International; Center for Infectious Disease and Biodefense Research; 140 Research Drive; Harrisonburg; Virginia; 22802; USA
| | - Dallas Joder
- SRI International; Center for Infectious Disease and Biodefense Research; 140 Research Drive; Harrisonburg; Virginia; 22802; USA
| | | | - Tatjana S. L. Keesen
- Biochemistry and Immunology Department; Universidade Federal de Minas Gerais; Belo Horizonte; MG; Brazil
| | - Rajeev Vaidyanathan
- SRI International; Center for Infectious Disease and Biodefense Research; 140 Research Drive; Harrisonburg; Virginia; 22802; USA
| | | | - Mary J. Tanga
- SRI International; Center for Infectious Disease and Biodefense Research; 333 Ravenswood Avenue; Menlo Park; California; 94025; USA
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Endale M, Ekberg A, Alao JP, Akala HM, Ndakala A, Sunnerhagen P, Erdélyi M, Yenesew A. Anthraquinones of the roots of Pentas micrantha. Molecules 2012; 18:311-21. [PMID: 23271468 PMCID: PMC6270246 DOI: 10.3390/molecules18010311] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 12/19/2012] [Accepted: 12/20/2012] [Indexed: 11/20/2022] Open
Abstract
Pentas micrantha is used in the East African indigenous medicine to treat malaria. In the first investigation of this plant, the crude methanol root extract showed moderate antiplasmodial activity against the W2- (3.37 μg/mL) and D6-strains (4.00 μg/mL) of Plasmodium falciparum and low cytotoxicity (>450 μg/mL, MCF-7 cell line). Chromatographic separation of the extract yielded nine anthraquinones, of which 5,6-dihydroxylucidin-11-O-methyl ether is new. Isolation of a munjistin derivative from the genus Pentas is reported here for the first time. The isolated constituents were identified by NMR and mass spectrometric techniques and showed low antiplasmodial activities.
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Affiliation(s)
- Milkyas Endale
- Department of Chemistry, University of Nairobi, P.O. Box 30197-00100, Nairobi, Kenya
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden
| | - Annabel Ekberg
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden
| | - John Patrick Alao
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden
| | - Hoseah M. Akala
- United States Army Medical Research Unit-Kenya, MRU 64109, APO, AE 09831, USA
| | - Albert Ndakala
- Department of Chemistry, University of Nairobi, P.O. Box 30197-00100, Nairobi, Kenya
| | - Per Sunnerhagen
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden
| | - Máté Erdélyi
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden
- Swedish NMR Center, University of Gothenburg, P.O. Box 465, SE-405 30 Gothenburg, Sweden
- Authors to whom correspondence should be addressed; E-Mail: (M.E.); (A.Y.); Tel.: +46-31-786-9033 (M.E.); Tel.: +254-202-444-6138 (A.Y.)
| | - Abiy Yenesew
- Department of Chemistry, University of Nairobi, P.O. Box 30197-00100, Nairobi, Kenya
- Authors to whom correspondence should be addressed; E-Mail: (M.E.); (A.Y.); Tel.: +46-31-786-9033 (M.E.); Tel.: +254-202-444-6138 (A.Y.)
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Wanzala W, Takken W, Mukabana WR, Pala AO, Hassanali A. Ethnoknowledge of Bukusu community on livestock tick prevention and control in Bungoma district, western Kenya. JOURNAL OF ETHNOPHARMACOLOGY 2012; 140:298-324. [PMID: 22306288 DOI: 10.1016/j.jep.2012.01.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Revised: 12/14/2011] [Accepted: 01/13/2012] [Indexed: 05/09/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE To date, nomadic communities in Africa have been the primary focus of ethnoveterinary research. The Bukusu of western Kenya have an interesting history, with nomadic lifestyle in the past before settling down to either arable or mixed arable/pastoral farming systems. Their collective and accumulative ethnoveterinary knowledge is likely to be just as rich and worth documenting. AIM OF THE STUDY The aim of the present study was to document indigenous knowledge of the Bukusu on the effect of livestock ticks and ethnopractices associated with their management. It was envisaged that this would provide a basis for further research on the efficacy of these practices that could also lead to the discovery of useful tick-control agents. MATERIALS AND METHODS Non-alienating, dialogic, participatory action research (PAR) and participatory rural appraisal (PRA) approaches involving 272 women and men aged between 18 and 118 years from the Bukusu community were used. RESULTS Ticks are traditionally classified and identified by colour, size, host range, on-host feeding sites, and habitat preference. Tick-associated problems recognised include kamabumba (local reference to East Coast fever, Anaplasmosis or Heartwater diseases transmitted by different species of livestock ticks) and general poor performance of livestock. Traditional methods of controlling ticks include handpicking, on-host use of ethnobotanical suspensions (prepared from one or more of over 150 documented plants) to kill the ticks and prevent re-infestation, fumigation of infested cattle with smoke derived from burning ethnobotanical products, burning pastures, rotational grazing ethnopractices, and livestock quarantine. CONCLUSIONS The study confirms that the Bukusu have preserved rich ethnoveterinary knowledge and practices. It provides some groundwork for elucidating the efficacy of some of these ethnopractices in protecting livestock from tick disease vectors, particularly those involving the use of ethnobotanicals, which may lead to the discovery of useful ant-tick agents.
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Affiliation(s)
- Wycliffe Wanzala
- School of Pure and Applied Sciences, Department of Biological Sciences, South Eastern University College (A Constituent College of the University of Nairobi), P.O. Box 170-90200, Kitui, Kenya.
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Chemical constituents of Stereospermum acuminatissimum and their urease and α-chymotrypsin inhibitions. Fitoterapia 2012; 83:204-8. [DOI: 10.1016/j.fitote.2011.10.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Revised: 10/19/2011] [Accepted: 10/23/2011] [Indexed: 11/23/2022]
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Ching FP, Omogbai EKI, Okpo SO, Ozolua RI. Antiinflammatory Activity of Aqueous Extract of Stereospermum kunthianum (Cham, Sandrine Petit) Stem Bark in Rats. Indian J Pharm Sci 2011; 71:106-10. [PMID: 20177475 PMCID: PMC2810041 DOI: 10.4103/0250-474x.51943] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2008] [Revised: 11/01/2008] [Accepted: 02/24/2009] [Indexed: 11/06/2022] Open
Abstract
Stereospermum kunthianum, Cham, Sandrine Petit (family: Bignoniaceae) is used in traditional medicine to treat bronchitis, pneumonia and coughs, gastritis, wounds, rheumatic arthritis, ulcers, dysentery, leprosy and venereal diseases in humans. The antiinflammatory activity of the aqueous extract of the stem bark was investigated with experimental animal models using the carrageenan-induced paw oedema, leucocytes migration and granuloma air pouch tests in rats. The extract (100, 200 or 400 mg/kg) at 3 h post-treatment caused a significant (p<0.05) reduction in the paw oedema in rats. The effect of the extract was most pronounced at the dose of 400 mg/kg and was higher than that of indomethacin (10 mg/kg). The extract (400 mg/kg) caused a significant (p<0.05) reduction in the number of recruited leucocytes and it's inhibition of peritoneal exudate formation was comparable to that of indomethacin at a dose of 10 mg/kg. The exudate formation inhibited by 400 mg/kg of the extract in the granuloma air pouch test was comparatively less to that of indomethacin at a dose of 10 mg/kg. The findings of the study indicate that the aqueous extract of Stereospermum kunthianum stem bark possesses antiinflammatory activity which is probably related to the inhibition of prostaglandin synthesis. This is a possible rationale for its folkloric use as an antiinflammatory agent.
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Affiliation(s)
- F P Ching
- Department of Pharmacology, Faculty of Basic Medical Sciences, College of Health Sciences, Niger Delta University, WilberforceIsland, Yenagoa, Bayelsa State, Nigeria
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Sanogo R. Medicinal plants traditionally used in Mali for dysmenorrhea. AFRICAN JOURNAL OF TRADITIONAL, COMPLEMENTARY, AND ALTERNATIVE MEDICINES 2011; 8:90-6. [PMID: 22754061 DOI: 10.4314/ajtcam.v8i5s.4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Dysmenorrhea is painful menstrual cramps, which negatively impacts the quality of life of a large percentage of the world's female population in reproductive age. The paper reviews the plants used in the Malian traditional medicine for the treatment of dysmenorrhea. Some medicinal plants were effective for treatments of dysmenorrhea with minimal side effects. Conventional therapy for dysmenorrhea, which usually includes non-steroidal anti-inflammatory drugs (NSAIDs), provides symptomatic relief, but presents increasing adverse effects with long-term use. This article is in the framework of a study supported by International Foundation for Science (IFS) on three medicinal plants used in the treatment of dysmenorrhea in Mali: Maytenus senegalensis Stereospermum kunthianum and Trichilia emetica.
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Affiliation(s)
- Rokia Sanogo
- Département Médecine Traditionnelle, Institut National de Recherche en Santé Publique and Faculty of Medicine, Pharmacy, Odontostomatology, University of Bamako, Mali.
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Wang X, Chen Y, Lee YR. Concise Synthesis of (±)-Rhinacanthin A, Dehydro α-Lapachone, and β-Lapachone, and Pyranonaphthoquinone Derivatives. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.1.153] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Bignoniaceae metabolites as semiochemicals. Molecules 2010; 15:7090-105. [PMID: 20948497 PMCID: PMC6259213 DOI: 10.3390/molecules15107090] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Revised: 09/07/2010] [Accepted: 09/22/2010] [Indexed: 11/26/2022] Open
Abstract
Members of the family Bignoniaceae are mostly found in tropical and neo-tropical regions in America, Asia and Africa, although some of them are cultivated in other regions as ornamentals. Species belonging to this family have been extensively studied in regard to their pharmacological properties (as extracts and isolated compounds). The aim of this review is to summarize the reported scientific evidence about the chemical properties as well as that of the extracts and isolated compounds from species of this family, focusing mainly in insect-plant interactions. As it is known, this family is recognized for the presence of iridoids which are markers of oviposition and feeding preference to species which have became specialist feeders. Some herbivore species have also evolved to the point of been able to sequester iridoids and use them as defenses against their predators. However, iridoids also exhibit anti-insect properties, and therefore they may be good lead molecules to develop botanical pesticides. Other secondary metabolites, such as quinones, and whole extracts have also shown potential as anti-insect agents.
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Waterman C, Smith RA, Pontiggia L, DerMarderosian A. Anthelmintic screening of Sub-Saharan African plants used in traditional medicine. JOURNAL OF ETHNOPHARMACOLOGY 2010; 127:755-759. [PMID: 19962435 DOI: 10.1016/j.jep.2009.11.025] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2009] [Revised: 11/19/2009] [Accepted: 11/24/2009] [Indexed: 05/28/2023]
Abstract
AIM OF STUDY This study screened for anthelmintic activity of plant species traditionally used in the treatment of intestinal parasites and their symptoms in Sub-Saharan Africa in an effort to confirm their local use and aid in the search for new compounds since resistance is a growing concern. MATERIALS AND METHODS Aqueous and organic extracts of 33 plant parts from 17 plant species traditionally used in the treatment of intestinal infections in Sub-Saharan Africa were evaluated for their anthelmintic activity. This activity was assessed using a standard motility assay against a levamisole resistant strain of the nematode Caenorhabditis elegans. RESULTS AND CONCLUSIONS Anthelmintic activity was confirmed in 12 plant species. Of these, eight showed strong evidence of activity (p<0.0001), one exhibited moderate evidence of activity (p<0.001), three demonstrated weak evidence of activity (p<0.05), and five plants showed no evidence of activity. The eight species with the strongest evidence of activity were Acacia polyacantha, Anogeissus leiocarpus, Bridelia micrantha, Cassia sieberiana, Combretum nigricans, Grewia bicolor, Strychnos spinosa and Ziziphus mucronata. In only two cases, Anogeissus leiocarpus and Cassia sieberiana, anthelmintic activity has been previously confirmed. The activity demonstrated against the levamisole resistant strain of Caenorhabditis elegans and the presence of molecules in these plants known or suspected of having a broad spectrum of activity provide support for further study of these plants and their compounds as possible treatments for parasitic worm infections.
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Affiliation(s)
- Carrie Waterman
- Department of Chemistry & Biochemistry, University of the Sciences in Philadelphia, Philadelphia, PA 19104-4495, USA.
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Appleton DR, Chuen CS, Berridge MV, Webb VL, Copp BR. Rossinones A and B, Biologically Active Meroterpenoids from the Antarctic Ascidian, Aplidium species. J Org Chem 2009; 74:9195-8. [DOI: 10.1021/jo901846j] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David R. Appleton
- Department of Chemistry, The University of Auckland, Private Bag 92019, Auckland, New Zealand
- Centre for Natural Products Research and Drug Discovery, Department of Pharmacology, Faculty of Medicine, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Cheah Shiau Chuen
- Centre for Natural Products Research and Drug Discovery, Department of Pharmacology, Faculty of Medicine, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Michael V. Berridge
- Malaghan Institute of Medical Research, P.O. Box 7060, Wellington, New Zealand
| | - Victoria L. Webb
- National Institute of Water & Atmospheric Research (NIWA) Ltd, Private Bag 14-901, Kilbirnie, Wellington, New Zealand
| | - Brent R. Copp
- Department of Chemistry, The University of Auckland, Private Bag 92019, Auckland, New Zealand
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Ching FP, Omogbai EKI, Otokiti IO. Aqueous stem bark extract of Stereospermum kunthianum (Cham, Sandrine Petit) protects against generalized seizures in pentylenetetrazole and electro-convulsive models in rodents. AFRICAN JOURNAL OF TRADITIONAL, COMPLEMENTARY, AND ALTERNATIVE MEDICINES 2009; 6:544-8. [PMID: 20606775 DOI: 10.4314/ajtcam.v6i4.57197] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Stereospermum kunthianum, Cham Sandrine Petit (Bignoniaceae) known in English as pink jacaranda is used in traditional medicine to treat an array of ailments including febrile convulsions in infants and young children by the rural dwellers in Nigeria. This study examined the anticonvulsant activity of its aqueous stem bark extract (100 - 400mg/kg) against maximal electroshock and pentylenetetrazole-induced seizures in rodents. Phenobarbitone and ethosuximide were used as reference anticonvulsant drugs for comparison. Stereospermum kunthianum extract (200 - 400mg/kg, i.p.) remarkably protected (76.9% and 84.6 % respectively) the rats against electroshock-induced seizures. However, the extract (200- 400mg/kg) when administered orally showed a comparatively less effect (33.3% and 55.6% respectively) to the intraperitoneally administered extract in the maximal electroshock test. The extract (100-400mg/kg, i.p.) significantly delayed (p<0.05) the onset of pentylenetetrazole-induced clonic seizures but only slightly prolonged the time of death of the mice. Although the findings in the present study do not provide conclusive evidence, it appears that the aqueous stem bark extract of Stereospermum kunthianum produces its antiseizure effect by enhancing GABAergic neurotransmission and/or action in the brain. The results indicate that the aqueous extract possesses anticonvulsant activity in rodents and therefore tend to suggest that the shrub may be used as a natural supplementary remedy in the management, control and/or treatment of childhood convulsions. It can be concluded that the aqueous stem bark extract possesses anticonvulsant activity and therefore lend pharmacological credence to the traditionally claimed use in the treatment of childhood convulsions.
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Affiliation(s)
- F P Ching
- Department of Pharmacology, Faculty of Basic Medical Sciences, College of Health Sciences, Niger Delta University, Wilberforce Island, Amassoma, Bayelsa State, Nigeria.
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Song YS, Lee KJ. A new synthetic route to 2H-benzo[g]chromene-5,10-diones involving ring closing metathesis. J Heterocycl Chem 2009. [DOI: 10.1002/jhet.54] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Saha K, Lajis NH, Abas F, Naji NA, Hamzah AS, Shaari K. Halophenol Rearrangement in Lewis Acid-Catalyzed Friedel - Crafts Conditions: Evidence of Competitive Initial Protonation and Acylation. Aust J Chem 2008. [DOI: 10.1071/ch08084] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Halogen rearrangement was observed during the Lewis acid-catalyzed Friedel–Crafts reaction of phthalic anhydride with bromophenols or bromoanisole. Further investigation revealed that 2-, 3-, and 4-bromophenols undergo rearrangement into other isomers under these reaction conditions. Product distribution from these reactions suggested that halogen rearrangement takes place during the s-complex intermediate of the condensation step. Furthermore, iodophenol undergoes hydrodeiodination rapidly rather than rearrangement, whereas chlorophenol does not undergo rearrangement at all.
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Ndjakou Lenta B, Vonthron-Sénécheau C, Fongang Soh R, Tantangmo F, Ngouela S, Kaiser M, Tsamo E, Anton R, Weniger B. In vitro antiprotozoal activities and cytotoxicity of some selected Cameroonian medicinal plants. JOURNAL OF ETHNOPHARMACOLOGY 2007; 111:8-12. [PMID: 17141994 DOI: 10.1016/j.jep.2006.10.036] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2006] [Revised: 09/26/2006] [Accepted: 10/10/2006] [Indexed: 05/12/2023]
Abstract
Eight extracts from seven selected Cameroonian medicinal plants, traditionally used to treat malaria and other protozoal diseases, were tested in vitro for their antiprotozoal activities against Plasmodium falciparum K1 chloroquine-resistant strain, Leishmania donovani, Trypanosoma cruzi and Trypanosoma brucei rhodesiense, protozoa responsible for malaria, visceral leishmaniasis, Chagas disease and African trypanosomiasis, respectively. The most active extract against Plasmodium falciparum K1 strain and Trypanosoma brucei rhodesiense was the methanolic extract of Albizia zygia (Fabaceae) stem bark with IC(50) values of 1.0 microg/ml and 0.2 microg/ml, respectively. Five extracts showed IC(50) values below 5mug/ml against Leishmania donovani, with the methanolic seed extract of Harungana madagascarensis showing the highest activity, but only the methanolic extract of Albizia zygia showed activity against Trypanosoma cruzi. Cytotoxicity and selectivity indexes were estimated for the most active extracts. The best ratio of cytotoxicity to antiplasmodial activity (SI(a)=14) was established for the methanolic leaf extract of Symphonia globulifera (Clusiaceae), while the methanolic stem bark extract of Albizia zygia showed the best ratio of cytotoxicity to antitrypanosomal activity (SI(b)=22.5).
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Affiliation(s)
- B Ndjakou Lenta
- Department of Chemistry, Higher Teachers' Training College, University of Yaoundé 1, Yaoundé, Cameroon
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Haque MR, Rahman KM, Iskander MN, Hasan CM, Rashid MA. Stereochenols A and B, two quinones from Stereospermum chelonoides. PHYTOCHEMISTRY 2006; 67:2663-5. [PMID: 17027879 DOI: 10.1016/j.phytochem.2006.08.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2006] [Revised: 08/05/2006] [Accepted: 08/10/2006] [Indexed: 05/12/2023]
Abstract
Two quinones, stereochenols A (1) and B (2) were isolated from a methanol extract of the stem bark of Stereospermum chelonoides, in addition to the known naphthoquinones, sterekunthal B (3) and sterequinone C (4). The structures of these compounds were established by extensive spectroscopic analyses and by comparison of their spectral data with those of related compounds.
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Affiliation(s)
- Mohammad R Haque
- Phytochemical Research Laboratory, Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Dhaka, Dhaka 1000, Bangladesh
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Takao KI, Munakata R, Tadano KI. Recent advances in natural product synthesis by using intramolecular Diels-Alder reactions. Chem Rev 2006; 105:4779-807. [PMID: 16351062 DOI: 10.1021/cr040632u] [Citation(s) in RCA: 535] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ken-Ichi Takao
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama, Japan
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Kumar US, Tiwari AK, Reddy SV, Aparna P, Rao RJ, Ali AZ, Rao JM. Free-radical-scavenging and xanthine oxidase inhibitory constituents from Stereospermum personatum. JOURNAL OF NATURAL PRODUCTS 2005; 68:1615-21. [PMID: 16309309 DOI: 10.1021/np058036y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Bioassay-guided fractionation of different extracts of both stem and stem bark of Stereospermum personatum led to the isolation of free-radical-scavenging and xanthine oxidase inhibitory molecules along with three new anthraquinones, sterequinones F-H (1-3), a new naphthoquinone, sterequinone I (4), two new phenethyl esters, 2(4'-hydroxyphenyl)ethyl undecanoate (14) and 2(4'-hydroxyphenyl)ethyl nonacosanoate (15), and a new 3,4,5-trimethoxycinnamyl ether, 2-methoxy-4-[3'-(3'',4'',5''trimethoxyphenyl)allyloxymethyl]phenol (16), together with known compounds. The antioxidant and xanthine oxidase inhibitory potentials of the isolated compounds are reported.
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Affiliation(s)
- U Sampath Kumar
- Natural Products Laboratory, Division of Organic Chemistry-I, Indian Institute of Chemical Technology, Hyderabad-500 007, India
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Malerich JP, Maimone TJ, Elliott GI, Trauner D. Biomimetic synthesis of antimalarial naphthoquinones. J Am Chem Soc 2005; 127:6276-83. [PMID: 15853334 DOI: 10.1021/ja050092y] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The total synthesis of naphthoquinone natural products isolated from the Bignoniaceae plant family is described. Pinnatal, isopinnatal, sterekunthals A and B, pyranokunthones A and B, and anthrakunthone have been prepared along the lines of a biosynthetic proposal involving pericyclic reactions as key steps. The first case of catalysis in oxa 6pi electrocyclizations is reported.
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Affiliation(s)
- Jeremiah P Malerich
- Department of Chemistry, University of California-Berkeley, Berkeley, California 94720-1460, USA
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Kapoor VK, Kumar K. Recent Advances in the Search for Newer Antimalarial Agents. PROGRESS IN MEDICINAL CHEMISTRY 2005; 43:189-237. [PMID: 15850826 DOI: 10.1016/s0079-6468(05)43006-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Vijay K Kapoor
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India
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Hsung R, Kurdyumov A, Sydorenko N. A Formal [3 + 3] Cycloaddition Approach to Natural‐Product Synthesis. European J Org Chem 2004. [DOI: 10.1002/ejoc.200400567] [Citation(s) in RCA: 142] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Richard P. Hsung
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - Aleksey V. Kurdyumov
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - Nadiya Sydorenko
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, USA
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