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Mayeka JG, Nyandoro SS, Munissi JJE. Genus Monanthotaxis: a review on distribution, ethnomedicinal uses and phytochemistry. Nat Prod Res 2024:1-17. [PMID: 38259197 DOI: 10.1080/14786419.2024.2301743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 12/30/2023] [Indexed: 01/24/2024]
Abstract
This article reviews the geographical distribution, ethnomedicinal applications, and phytochemistry of the genus Monanthotaxis Baill, tribe Uvariae of the family Annonaceae. The reviewed works of literature were collected from various electronic databases including Google Scholar, PubMed, Science Direct, The International Plant Names Index (IPNI), and Research Gate. During this review, ninety-eight species of the genus Monanthotaxis were found to be widely distributed in tropical Africa. Some of those species are used in folkloric medicine by various communities to manage diseases and disease conditions such as fever, vomiting, headache, stomach-ache, malaria, helminthiasis, and hysteria. In the past 44 years (1979 to 2023), one hundred and nineteen secondary metabolites with different biomedical potentials have been reported from this genus. The reported compounds are categorised into flavonoids, alkaloids, terpenoids, polyoxygenated cyclohexane, and cyclohexene derivatives, benzyl derivatives, cinnamic acid derivatives, and stilbenoids. Most of the reported compounds showed an array of bioactivities corroborating the use of some members of the genus in folkloric medicine.
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Affiliation(s)
- James G Mayeka
- Chemistry Department, University of Dar es Salaam, Dar es Salaam, Tanzania
- Department of Educational Curriculum and Instructions, School of Education, Sokoine University of Agriculture, Morogoro, Tanzania
| | - Stephen S Nyandoro
- Chemistry Department, University of Dar es Salaam, Dar es Salaam, Tanzania
| | - Joan J E Munissi
- Chemistry Department, University of Dar es Salaam, Dar es Salaam, Tanzania
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2
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Mahambo E, Uwamariya C, Miah M, Clementino LDC, Alvarez LCS, Di Santo Meztler GP, Trybala E, Said J, Wieske LHE, Ward JS, Rissanen K, Munissi JJE, Costa FTM, Sunnerhagen P, Bergström T, Nyandoro SS, Erdelyi M. Crotofolane Diterpenoids and Other Constituents Isolated from Croton kilwae. J Nat Prod 2023; 86:380-389. [PMID: 36749598 PMCID: PMC9972476 DOI: 10.1021/acs.jnatprod.2c01007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Indexed: 06/18/2023]
Abstract
Six new crotofolane diterpenoids (1-6) and 13 known compounds (7-19) were isolated from the MeOH-CH2Cl2 (1:1, v/v) extracts of the leaves and stem bark of Croton kilwae. The structures of the new compounds were elucidated by extensive analysis of spectroscopic and mass spectrometric data. The structure of crotokilwaepoxide A (1) was confirmed by single-crystal X-ray diffraction, allowing for the determination of its absolute configuration. The crude extracts and the isolated compounds were investigated for antiviral activity against respiratory syncytial virus (RSV) and human rhinovirus type-2 (HRV-2) in HEp-2 and HeLa cells, respectively, for antibacterial activity against the Gram-positive Bacillus subtilis and the Gram-negative Escherichia coli, and for antimalarial activity against the Plasmodium falciparum Dd2 strain. ent-3β,19-Dihydroxykaur-16-ene (7) and ayanin (16) displayed anti-RSV activities with IC50 values of 10.2 and 6.1 μM, respectively, while exhibiting only modest cytotoxic effects on HEp-2 cells that resulted in selectivity indices of 4.9 and 16.4. Compounds 2 and 5 exhibited modest anti-HRV-2 activity (IC50 of 44.6 μM for both compounds), while compound 16 inhibited HRV-2 with an IC50 value of 1.8 μM. Compounds 1-3 showed promising antiplasmodial activities (80-100% inhibition) at a 50 μM concentration.
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Affiliation(s)
- Emanuel
T. Mahambo
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Colores Uwamariya
- Department
of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska
Academy, University of Gothenburg, S-413 46 Gothenburg, Sweden
| | - Masum Miah
- Department
of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska
Academy, University of Gothenburg, S-413 46 Gothenburg, Sweden
| | - Leandro da Costa Clementino
- Laboratory
of Tropical Diseases - Prof. Dr. Luiz Jacinto da Silva, Department
of Genetics, Evolution, Microbiology and Immunology, Institute of
Biology (IB), University of Campinas - UNICAMP, Campinas, 13083-970 SP, Brazil
| | - Luis Carlos Salazar Alvarez
- Laboratory
of Tropical Diseases - Prof. Dr. Luiz Jacinto da Silva, Department
of Genetics, Evolution, Microbiology and Immunology, Institute of
Biology (IB), University of Campinas - UNICAMP, Campinas, 13083-970 SP, Brazil
| | - Gabriela Paula Di Santo Meztler
- Department
of Chemistry and Molecular Biology and Centre for Antibiotic Resistance
Research (CARe), University of Gothenburg, SE-405 30 Gothenburg, Sweden
| | - Edward Trybala
- Department
of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska
Academy, University of Gothenburg, S-413 46 Gothenburg, Sweden
| | - Joanna Said
- Department
of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska
Academy, University of Gothenburg, S-413 46 Gothenburg, Sweden
| | - Lianne H. E. Wieske
- Department
of Chemistry − BMC, Uppsala University, SE-751 23 Uppsala, Sweden
| | - Jas S. Ward
- Department
of Chemistry, University of Jyvaskyla, Survontie 9B, 40014 Jyväskylä, Finland
| | - Kari Rissanen
- Department
of Chemistry, University of Jyvaskyla, Survontie 9B, 40014 Jyväskylä, Finland
| | - Joan J. E. Munissi
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Fabio T. M. Costa
- Laboratory
of Tropical Diseases - Prof. Dr. Luiz Jacinto da Silva, Department
of Genetics, Evolution, Microbiology and Immunology, Institute of
Biology (IB), University of Campinas - UNICAMP, Campinas, 13083-970 SP, Brazil
| | - Per Sunnerhagen
- Department
of Chemistry and Molecular Biology and Centre for Antibiotic Resistance
Research (CARe), University of Gothenburg, SE-405 30 Gothenburg, Sweden
| | - Tomas Bergström
- Department
of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska
Academy, University of Gothenburg, S-413 46 Gothenburg, Sweden
| | - Stephen S. Nyandoro
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Mate Erdelyi
- Department
of Chemistry − BMC, Uppsala University, SE-751 23 Uppsala, Sweden
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Tibashailwa N, Stephano F, Shadrack DM, Munissi JJE, Nyandoro SS. Neuroprotective potential of cinnamoyl derivatives against Parkinson's disease indicators in Drosophila melanogaster and in silico models. Neurotoxicology 2023; 94:147-157. [PMID: 36410467 DOI: 10.1016/j.neuro.2022.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 09/23/2022] [Accepted: 11/17/2022] [Indexed: 11/22/2022]
Abstract
Parkinson's disease (PD) is a movement disorder resulting from the loss of dopaminergic neurons over time. While there is no cure for PD, available conventional therapies aid to manage the motor symptoms. Natural products (NPs) derived from plants are among the most potent alternative therapies for PD. This study explored the neuroprotective potential of selected cinnamoyl derivatives namely toussaintine A (1), E-toussaintine E (2), asperphenamate (3) and julocrotine (4) against PD indicators using rotenone-challenged Drosophila melanogaster and in silico models. The compounds were first assessed for their toxicity preceding treatment experiments. Adult flies (aged 1-4 days) were exposed to varying concentrations of the compounds for 7 days. During the experiment, the mortality of flies was observed, and the lethal concentration (LC50) of each tested compound was determined. The LC50 values were found to be 50.1, 55.6, 513.5, and 101.0 µM for compounds 1, 2, 3, and 4, respectively. For seven days, we exposed flies to 500 µM of rotenone and co-fed with a chosen dose of 40 µM of each test compound in the diet. Using a negative geotaxis test, rotenone-challenged flies exhibited compromised climbing ability in comparison to control flies, the condition that was reversed by the action of studied compounds. Rotenone exposure also elevated malondialdehyde levels in the brain tissues, as measured by lipid peroxidation, when compared to control flies. In flies exposed to rotenone and co-fed with the compounds, this effect was lessened. In flies exposed to rotenone, mRNA levels of antioxidant enzymes such as superoxide dismutase and catalase were raised but were normalized in flies treated with the investigated compounds. Moreover, in-silico studies examined the inhibitory ability of compounds 1-4 against selected PD molecular targets, revealing the strong power of toussaintine A (1) against Adenosine receptor 2 (A2AR) and monoamine oxidase B. Thus, our findings suggest that cinnamoyl derivatives have neuroprotective potential via reducing the oxidative burden and improving locomotor ability after toxin invectives. In particular, compound 1 at lower doses can simultaneously be a potential inhibitor of A2AR and an anti-oxidative mediator in the development of anti-PD agents.
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Affiliation(s)
- Nelson Tibashailwa
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O Box 35061, Dar es Salaam, Tanzania; Department of Zoology and Wildlife Conservation, College of Natural and Applied Sciences, University of Dar es Salaam, P.O Box 35064, Dar es Salaam, Tanzania
| | - Flora Stephano
- Department of Zoology and Wildlife Conservation, College of Natural and Applied Sciences, University of Dar es Salaam, P.O Box 35064, Dar es Salaam, Tanzania.
| | - Daniel M Shadrack
- Department of Chemistry, Faculty of Natural and Applied Sciences, St. John's University of Tanzania, Dodoma, P.O Box 47, Dodoma, Tanzania
| | - Joan J E Munissi
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O Box 35061, Dar es Salaam, Tanzania
| | - Stephen S Nyandoro
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O Box 35061, Dar es Salaam, Tanzania
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Deogratias G, Shadrack DM, Munissi JJE, Kinunda GA, Jacob FR, Mtei RP, Masalu RJ, Mwakyula I, Kiruri LW, Nyandoro SS. Hydrophobic π-π stacking interactions and hydrogen bonds drive self-aggregation of luteolin in water. J Mol Graph Model 2022; 116:108243. [PMID: 35777224 DOI: 10.1016/j.jmgm.2022.108243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 05/12/2022] [Accepted: 06/05/2022] [Indexed: 12/14/2022]
Abstract
Luteolin is a flavonoid obtained from different plant species. It is known for its versatile biological activities. However, the beneficial effects of luteolin have been limited to small concentrations as a result of poor water solubility. This study aimed at investigating the hydrophobic interaction and hydration of luteolin towards the improvement of its solubility when used as a drug. We report the aggregation properties of luteolin in water by varying the number of monomers using atomistic molecular dynamics simulation. Results show that the equilibrium structure of luteolin occurs in an aggregated state with different structural arrangements. As the monomers size increase, the antiparallel flipped conformation dominates over T-shaped antiparallel, T-shaped parallel, and antiparallel conformations. The formation of intramolecular hydrogen bonding of 0.19 nm between the keto-enol groups results in hydrophobic characteristics. A larger cluster exhibits slow hydrogen bond dynamics for luteolin-luteolin than luteolin-water interaction. Water structure at large cluster size exhibited slow dynamics and low self-diffusion of luteolin. The existence of hydrophobic π-π and hydrogen bonds between luteolin molecules drives strong self-aggregation resulting in poor water solubility. Breakage of these established interactions would result in increased solubility of luteolin in water.
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Affiliation(s)
- Geradius Deogratias
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania.
| | - Daniel M Shadrack
- Department of Chemistry, Faculty of Natural and Applied Sciences, St. John's University of Tanzania, P.O. Box 47, Dodoma, Tanzania
| | - Joan J E Munissi
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Grace A Kinunda
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Fortunatus R Jacob
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Regina P Mtei
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Rose J Masalu
- Department of Molecular Biology and Biotechnology, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 25179, Dar es Salaam, Tanzania
| | - Issakwisa Mwakyula
- Mbeya College of Health and Allied Sciences, University of Dar es Salaam, P.O. Box 608, Mbeya, Tanzania
| | - Lucy W Kiruri
- Department of Chemistry, Kenyatta University, P.O.Box, 43844-00100, Nairobi, Kenya
| | - Stephen S Nyandoro
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
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Kalenga T, Mollel JT, Said J, Orthaber A, Ward JS, Atilaw Y, Umereweneza D, Ndoile MM, Munissi JJE, Rissanen K, Trybala E, Bergström T, Nyandoro SS, Erdelyi M. Modified ent-Abietane Diterpenoids from the Leaves of Suregada zanzibariensis. J Nat Prod 2022; 85:2135-2141. [PMID: 36075014 PMCID: PMC9513791 DOI: 10.1021/acs.jnatprod.2c00147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Indexed: 06/15/2023]
Abstract
The leaf extract of Suregada zanzibariensis gave two new modified ent-abietane diterpenoids, zanzibariolides A (1) and B (2), and two known triterpenoids, simiarenol (3) and β-amyrin (4). The structures of the isolated compounds were elucidated based on NMR and MS data analysis. Single-crystal X-ray diffraction was used to establish the absolute configurations of compounds 1 and 2. The crude leaf extract inhibited the infectivity of herpes simplex virus 2 (HSV-2, IC50 11.5 μg/mL) and showed toxicity on African green monkey kidney (GMK AH1) cells at CC50 52 μg/mL. The isolated compounds 1-3 showed no anti-HSV-2 activity and exhibited insignificant toxicity against GMK AH1 cells at ≥100 μM.
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Affiliation(s)
- Thobias
M. Kalenga
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
- Department
of Chemistry, College of Education, Mwalimu
Julius K. Nyerere University of Agriculture and Technology, P.O. Box 976, Butiama, Tanzania
| | - Jackson T. Mollel
- Institute
of Traditional Medicine, Muhimbili University
of Health and Allied Sciences, P.O. Box 65001, Dar es Salaam, Tanzania
- Department
of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska
Academy, University of Gothenburg, S-413 46 Gothenburg, Sweden
| | - Joanna Said
- Department
of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska
Academy, University of Gothenburg, S-413 46 Gothenburg, Sweden
| | - Andreas Orthaber
- Department
of Chemistry − Ångström, Uppsala University, SE-751 20 Uppsala, Sweden
| | - Jas S. Ward
- University
of Jyvaskyla, Department of Chemistry, 40014 Jyväskylä, Finland
| | - Yoseph Atilaw
- Department
of Chemistry − BMC, Uppsala University, SE-751 23 Uppsala, Sweden
| | - Daniel Umereweneza
- Department
of Chemistry − BMC, Uppsala University, SE-751 23 Uppsala, Sweden
- Department
of Chemistry, College of Science and Technology, University of Rwanda, P.O Box 3900, Kigali, Rwanda
| | - Monica M. Ndoile
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Joan J. E. Munissi
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Kari Rissanen
- University
of Jyvaskyla, Department of Chemistry, 40014 Jyväskylä, Finland
| | - Edward Trybala
- Department
of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska
Academy, University of Gothenburg, S-413 46 Gothenburg, Sweden
| | - Tomas Bergström
- Department
of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska
Academy, University of Gothenburg, S-413 46 Gothenburg, Sweden
| | - Stephen S. Nyandoro
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Mate Erdelyi
- Department
of Chemistry − BMC, Uppsala University, SE-751 23 Uppsala, Sweden
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Maeda G, Gilissen PJ, Rudenko A, van der Wal J, Bourgard C, Gupta AK, Sunnerhagen P, Munissi JJE, Nyandoro SS, Erdélyi M. Oxygenated Cyclohexene Derivatives from the Stem and Root Barks of Uvaria pandensis. J Nat Prod 2021; 84:3080-3089. [PMID: 34802242 PMCID: PMC8713284 DOI: 10.1021/acs.jnatprod.1c00811] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Indexed: 05/13/2023]
Abstract
Five new cyclohexene derivatives, dipandensin A and B (1 and 2) and pandensenols A-C (3-5), and 16 known secondary metabolites (6-21) were isolated from the methanol-soluble extracts of the stem and root barks of Uvaria pandensis. The structures were characterized by NMR spectroscopic and mass spectrometric analyses, and that of 6-methoxyzeylenol (6) was further confirmed by single-crystal X-ray crystallography, which also established its absolute configuration. The isolated metabolites were evaluated for antibacterial activity against the Gram-positive bacteria Bacillus subtilis and Staphylococcus epidermidis and the Gram-negative bacteria Enterococcus raffinosus, Escherichia coli, Paraburkholderia caledonica, Pectobacterium carotovorum, and Pseudomonas putida, as well as for cytotoxicity against the MCF-7 human breast cancer cell line. A mixture of uvaretin (20) and isouvaretin (21) exhibited significant antibacterial activity against B. subtilis (EC50 8.7 μM) and S. epidermidis (IC50 7.9 μM). (8'α,9'β-Dihydroxy)-3-farnesylindole (12) showed strong inhibitory activity (EC50 9.8 μM) against B. subtilis, comparable to the clinical reference ampicillin (EC50 17.9 μM). None of the compounds showed relevant cytotoxicity against the MCF-7 human breast cancer cell line.
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Affiliation(s)
- Gasper Maeda
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, Dar es Salaam, Tanzania
- Department
of Chemistry−BMC, Uppsala University, SE-751 23 Uppsala, Sweden
| | - Pieter J. Gilissen
- Institute
for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Anastasia Rudenko
- Department
of Chemistry and Molecular Biology, University of Gothenburg,
and Centre for Antibiotic Resistance Research (CARe)
at the University of Gothenburg, SE-405 30 Gothenburg, Sweden
| | - Jelle van der Wal
- Department
of Chemistry and Molecular Biology, University of Gothenburg,
and Centre for Antibiotic Resistance Research (CARe)
at the University of Gothenburg, SE-405 30 Gothenburg, Sweden
| | - Catarina Bourgard
- Department
of Chemistry and Molecular Biology, University of Gothenburg,
and Centre for Antibiotic Resistance Research (CARe)
at the University of Gothenburg, SE-405 30 Gothenburg, Sweden
| | - Arvind Kumar Gupta
- Department
of Chemistry−Ångström, Uppsala University, SE-751
20 Uppsala, Sweden
| | - Per Sunnerhagen
- Department
of Chemistry and Molecular Biology, University of Gothenburg,
and Centre for Antibiotic Resistance Research (CARe)
at the University of Gothenburg, SE-405 30 Gothenburg, Sweden
| | - Joan J. E. Munissi
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, Dar es Salaam, Tanzania
| | - Stephen S. Nyandoro
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, Dar es Salaam, Tanzania
| | - Máté Erdélyi
- Department
of Chemistry−BMC, Uppsala University, SE-751 23 Uppsala, Sweden
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China CR, Nyandoro SS, Munissi JJE, Maguta MM, Meyer M, Schroepfer M. Tanning capacity of Tessmannia burttii extracts: the potential eco-friendly tanning agents for the leather industry. J Leather Sci Eng 2021. [DOI: 10.1186/s42825-021-00055-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Abstract
In the present study, the tannins from stem and root barks of Tessmannia burttii Harms (Caesalpiniaceae), a plant species abundantly growing in Tanzania and other parts of Africa, were investigated for their suitability in hides tanning. Tannin powder was extracted at selected temperatures (30, 50 and 80 °C) and the influence of each temperature on the crosslinking capacity was evaluated. The interaction mechanism between hide powder collagen and the tannins was studied by Differential Scanning Calorimetry (DSC), trinitrobenzensulfonic (TNBS) acid assay and amino acid hydrolysis methods. Extraction temperatures showed low influence on crosslinking capacity of the tannins. However, extract obtained at 50 °C exhibited best performance in terms of gap size between Tonset and Tpeak. The stem bark extract yield was higher than that from the root bark, but both were within the recommended ranges. The tannin content (61%) of T. burttii stem bark extract was above recommended value (10%), whereas its total phenolic content and total flavonoic content were found to be above that of commercial Acacia mearnsii tannin. The study of cross-linking parameters as a function of pH showed cross-linking to occur via a covalent mechanism at the basic amino groups. However, the bonds were not resistant to acid hydrolysis. The observed interaction mechanism indicated that tannins from stem and root barks of T. burttii belong to the condensed tannin, similar to A. mearnsii (black wattle), a commercial tannin source that was used in this study as a reference. Findings from this study depict that T. burttii extracts are auspicious eco-friendly alternative source of vegetable tannins to overcome the use of chromium salts in the leather industry.
Graphical abstract
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Kalenga T, Ndoile MM, Atilaw Y, Gilissen PJ, Munissi JJE, Rudenko A, Bourgard C, Sunnerhagen P, Nyandoro SS, Erdelyi M. Biflavanones, Chalconoids, and Flavonoid Analogues from the Stem Bark of Ochna holstii. J Nat Prod 2021; 84:364-372. [PMID: 33511842 PMCID: PMC7923207 DOI: 10.1021/acs.jnatprod.0c01017] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Indexed: 05/20/2023]
Abstract
Two new biflavanones (1 and 2), three new bichalconoids (3-5), and 11 known flavonoid analogues (6-16) were isolated from the stem bark extract (CH3OH-CH2Cl2, 7:3, v/v) of Ochna holstii. The structures of the isolated metabolites were elucidated by NMR spectroscopic and mass spectrometric analyses. The crude extract and the isolated metabolites were evaluated for antibacterial activity against Bacillus subtilis (Gram-positive) and Escherichia coli (Gram-negative) as well as for cytotoxicity against the MCF-7 human breast cancer cell line. The crude extract and holstiinone A (1) exhibited moderate antibacterial activity against B. subtilis with MIC values of 9.1 μg/mL and 14 μM, respectively. The crude extract and lophirone F (14) showed cytotoxicity against MCF-7 with EC50 values of 11 μg/mL and 24 μM, respectively. The other isolated metabolites showed no significant antibacterial activities (MIC > 250 μM) and cytotoxicities (EC50 ≥ 350 μM).
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Affiliation(s)
- Thobias
M. Kalenga
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Monica M. Ndoile
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Yoseph Atilaw
- Department
of Chemistry − BMC, Uppsala University, SE-751 23 Uppsala, Sweden
| | - Pieter J. Gilissen
- Institute
for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Joan J. E. Munissi
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Anastasia Rudenko
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, SE-405 30 Gothenburg, Sweden
- Centre
for Antibiotic Resistance Research (CARe) at the University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Catarina Bourgard
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, SE-405 30 Gothenburg, Sweden
- Centre
for Antibiotic Resistance Research (CARe) at the University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Per Sunnerhagen
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, SE-405 30 Gothenburg, Sweden
- Centre
for Antibiotic Resistance Research (CARe) at the University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Stephen S. Nyandoro
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Mate Erdelyi
- Department
of Chemistry − BMC, Uppsala University, SE-751 23 Uppsala, Sweden
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9
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Kalenga TM, Ndoile MM, Atilaw Y, Munissi JJE, Gilissen PJ, Rudenko A, Bourgard C, Sunnerhagen P, Nyandoro SS, Erdelyi M. Antibacterial and cytotoxic biflavonoids from the root bark of Ochna kirkii. Fitoterapia 2021; 151:104857. [PMID: 33582268 DOI: 10.1016/j.fitote.2021.104857] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Revised: 02/03/2021] [Accepted: 02/04/2021] [Indexed: 10/22/2022]
Abstract
The new isoflavonoid kirkinone A (1) and biflavonoid kirkinone B (2) along with six known compounds (3-8) were isolated from the methanolic extract of the root bark of Ochna kirkii. The compounds were identified by NMR spectroscopic and mass spectrometric analyses. Out of the eight isolated natural products, calodenin B (4) and lophirone A (6) showed significant antibacterial activity against the Gram-positive bacterium Bacillus subtilis with MIC values of 2.2 and 28 μM, and cytotoxicity against the MCF-7 human breast cancer cell line with EC50 values of 219.3 and 19.2 μM, respectively. The methanolic crude extract of the root bark exhibited cytotoxicity at EC50 8.4 μg/mL. The isolated secondary metabolites and the crude extract were generally inactive against the Gram-negative Escherichia coli (MIC ≥400 μg/mL). Isolation of biflavonoids and related secondary metabolites from O. kirkii demonstrates their chemotaxonomic significance to the genus Ochna and to other members of the family Ochnaceae.
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Affiliation(s)
- Thobias M Kalenga
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Monica M Ndoile
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Yoseph Atilaw
- Department of Chemistry - BMC, Uppsala University, SE-751 23 Uppsala, Sweden
| | - Joan J E Munissi
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Pieter J Gilissen
- Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, the Netherlands
| | - Anastasia Rudenko
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden; Centre for Antibiotic Resistance Research (CARe) at the University of Gothenburg, 40530 Gothenburg, Sweden
| | - Catarina Bourgard
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden; Centre for Antibiotic Resistance Research (CARe) at the University of Gothenburg, 40530 Gothenburg, Sweden
| | - Per Sunnerhagen
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden; Centre for Antibiotic Resistance Research (CARe) at the University of Gothenburg, 40530 Gothenburg, Sweden
| | - Stephen S Nyandoro
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania.
| | - Mate Erdelyi
- Department of Chemistry - BMC, Uppsala University, SE-751 23 Uppsala, Sweden.
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10
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Munissi JJE, Isyaka SM, Mas-Claret E, Brabner M, Langat MK, Nyandoro SS, Mulholland DA. Ent-clerodane and ent-trachylobane diterpenoids from Croton dictyophlebodes. Phytochemistry 2020; 179:112487. [PMID: 32847772 DOI: 10.1016/j.phytochem.2020.112487] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 08/07/2020] [Accepted: 08/10/2020] [Indexed: 06/11/2023]
Abstract
The stem bark and root bark extracts of Croton dictyophlebodes (Euphorbiaceae) yielded seven undescribed ent-clerodanes: 15,16-epoxy-17,12(S)-olide-ent-cleroda-1,3,13(16),14-tetraen-18-oic acid methyl ester (crotodictyo A), 3β,4β:15,16-diepoxy-ent-cleroda-13(16),14-dien-20-al (crotodictyo B), 3β,4β:15,16-diepoxy-ent-cleroda-13(16),14-dien-19,20-dioic acid (crotodictyo C), 3β,4β:15,16-diepoxy-ent-cleroda-13(16),14-dien-20,19-olide (crotodictyo D), 3β,4β:15,16-diepoxy-20,12(R)-olide ent-cleroda-13(16),14-dien-19-oic acid methyl ester (crotodictyo E), 15,16-epoxy-ent-cleroda-3,13(16),14-trien-12-oxo-18-oic acid (crotodictyo F) and 15,16-epoxy-ent-cleroda-1,3,13(16),14-tetraen-12-oxo-18-oic acid (crotodictyo G), in addition to 15,16-epoxy- ent-cleroda-3,13(16),14-trien-12-oxo-18-oic acid methyl ester (crotodictyo H), reported previously as a synthetic derivative, and acetyl aleuritolic acid. The root extract yielded two ent-trachylobanes, ent-trachylobane-18,19-diol, the undescribed ent-trachylobane-2α,19-diol, along with ent-kaur-16-en-19-oic acid and 2-methoxybenzyl benzoate. Compounds were evaluated against the NCI 60 panel of human tumour cell lines at a single dose of 10-5 M, but showed no significant activity.
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Affiliation(s)
- Joan J E Munissi
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O.Box 35061, Dar es Salaam, Tanzania
| | - Sani M Isyaka
- Natural Products Research Group, Department of Chemistry, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, GU2 7XH, UK
| | - Eduard Mas-Claret
- Natural Products Research Group, Department of Chemistry, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, GU2 7XH, UK
| | - Molly Brabner
- Natural Products Research Group, Department of Chemistry, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, GU2 7XH, UK
| | - Moses K Langat
- Natural Products Research Group, Department of Chemistry, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, GU2 7XH, UK; Jodrell Laboratory, Natural Capital and Plant Health Department, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3DS, United Kingdom
| | - Stephen S Nyandoro
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O.Box 35061, Dar es Salaam, Tanzania.
| | - Dulcie A Mulholland
- Natural Products Research Group, Department of Chemistry, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, GU2 7XH, UK; School of Chemistry and Physics, University of KwaZulu-Natal, Durban, 4041, South Africa.
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11
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Zandi L, Makungu M, Munissi JJE, Duffy S, Puttreddy R, von der Heiden D, Rissanen K, Avery VM, Nyandoro SS, Erdélyi M. Secoiridoids and Iridoids from Morinda asteroscepa. J Nat Prod 2020; 83:2641-2646. [PMID: 32852949 PMCID: PMC7522965 DOI: 10.1021/acs.jnatprod.0c00447] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Indexed: 05/26/2023]
Abstract
The new 2,3-secoiridoids morisecoiridoic acids A (1) and B (2), the new iridoid 8-acetoxyepishanzilactone (3), and four additional known iridoids (4-7) were isolated from the leaf and stem bark methanol extracts of Morinda asteroscepa using chromatographic methods. The structure of shanzilactone (4) was revised. The purified metabolites were identified using NMR spectroscopic and mass spectrometric techniques, with the absolute configuration of 1 having been established by single-crystal X-ray diffraction analysis. The crude leaf extract (10 μg/mL) and compounds 1-3 and 5 (10 μM) showed mild antiplasmodial activities against the chloroquine-sensitive malaria parasite Plasmodium falciparum (3D7).
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Affiliation(s)
- Linda Zandi
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, Gothenburg SE-412 96, Sweden
| | - Marco Makungu
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, Gothenburg SE-412 96, Sweden
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Joan J. E. Munissi
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Sandra Duffy
- Discovery
Biology, Griffith Institute for Drug Discovery, Griffith University, Nathan, Q1d 4111, Australia
| | - Rakesh Puttreddy
- Department
of Chemistry, University of Jyvaskyla, P.O. Box 35, FI-40014, Jyvaskyla, Finland
| | | | - Kari Rissanen
- Department
of Chemistry, University of Jyvaskyla, P.O. Box 35, FI-40014, Jyvaskyla, Finland
| | - Vicky M. Avery
- Discovery
Biology, Griffith Institute for Drug Discovery, Griffith University, Nathan, Q1d 4111, Australia
| | - Stephen S. Nyandoro
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, Gothenburg SE-412 96, Sweden
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Máté Erdélyi
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, Gothenburg SE-412 96, Sweden
- Department
of Chemistry−BMC, Uppsala University, SE-751 23 Uppsala, Sweden
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12
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Siima AA, Stephano F, Munissi JJE, Nyandoro SS. Ameliorative effects of flavonoids and polyketides on the rotenone induced Drosophila model of Parkinson's disease. Neurotoxicology 2020; 81:209-215. [PMID: 32937168 DOI: 10.1016/j.neuro.2020.09.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 09/07/2020] [Accepted: 09/08/2020] [Indexed: 01/22/2023]
Abstract
Parkinson's disease (PD) is a movement disorder associated with the progressive loss of dopaminergic neurons (DA). PD treatment remains unsatisfactory as the current synthetic drugs in clinical use relies on managing only motor symptoms. This study investigated antioxidant potentials of selected compounds namely, 5,6,7,4'-tetramethoxyflavone (1), 6-hydroxy-2,3,4,4'-tetramethoxychalcone (2), 6-methoxyhamiltone A (3), diosquinone (4) and toussantine D (5) against rotenone (6) induced PD in Drosophila melanogaster. Toxicity of these compounds was conducted by monitoring flies' survival for seven days and determining the lethal concentrations (LC50). Whereas compound 1 had LC50 value of 91.3 μM within three days, compounds 2, 3, 4, and 5 had LC50 values of 87.2, 58.0, 64.0 and > 1000 μM, respectively on the seventh day of the experiment. We exposed flies (1-4 days old) to 500 μM rotenone and co-treated with different doses of the test compounds in the diet for seven days at final concentrations of 11.0, 43.6 and 87.2 μM for compounds 2 and 3. The concentrations used for compound 4 were 8.0, 32.0 and 64.0 μM, while 250, 500 and 1000 μM were used for compound 5. Rotenone fed flies showed impaired climbing ability compared to control flies, the phenotype that was rescued by the treatment of tested phytochemicals. Rotenone toxicity also increased malondialdehyde levels assayed by lipid peroxidation in the brain tissues relative to control flies. This effect was reduced in flies exposed to rotenone and co-treated with the phytochemicals. Moreover, expression levels of mRNA of antioxidant enzymes; superoxide dismutase and catalase were elevated in flies exposed to rotenone and normalized in flies that were co-treated with tested compounds. Besides compound 1, this study provides overall evidence that the tested flavonoids and polyketides ameliorated the rotenone provoked neurotoxicity in D. melanogaster by battling the induced oxidative stress in brain cells including DA neurons and hence rescue the locomotor behaviour deficits.
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Affiliation(s)
- Angela A Siima
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O Box 35061, Dar es Salaam, Tanzania; Department of Zoology and Wildlife Conservation, College of Natural and Applied Sciences, University of Dar es Salaam, P.O Box 35064, Dar es Salaam, Tanzania
| | - Flora Stephano
- Department of Zoology and Wildlife Conservation, College of Natural and Applied Sciences, University of Dar es Salaam, P.O Box 35064, Dar es Salaam, Tanzania.
| | - Joan J E Munissi
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O Box 35061, Dar es Salaam, Tanzania
| | - Stephen S Nyandoro
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O Box 35061, Dar es Salaam, Tanzania
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13
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Maeda G, Munissi JJE, Lindblad S, Duffy S, Pelletier J, Avery VM, Nyandoro SS, Erdélyi M. A Meroisoprenoid, Heptenolides, and C-Benzylated Flavonoids from Sphaerocoryne gracilis ssp. gracilis. J Nat Prod 2020; 83:316-322. [PMID: 32067457 PMCID: PMC7343278 DOI: 10.1021/acs.jnatprod.9b00721] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Indexed: 05/31/2023]
Abstract
A new meroisoprenoid (1), two heptenolides (2 and 3), two C-benzylated flavonoids (4 and 5), and 11 known compounds (6-16) were isolated from leaf, stem bark, and root bark extracts of Sphaerocoryne gracilis ssp. gracilis by chromatographic separation. The structures of the new metabolites 1-5 were established by NMR, IR, and UV spectroscopic and mass spectrometric data analysis. (Z)-Sphaerodiol (7), (Z)-acetylmelodorinol (8), 7-hydroxy-6-hydromelodienone (10), and dichamanetin (15) inhibited the proliferation of Plasmodium falciparum (3D7, Dd2) with IC50 values of 1.4-10.5 μM, although these compounds also showed cytotoxicity against human embryonic kidney HEK-293 cells. None of the compounds exhibited significant disruption in protein translation when assayed in vitro.
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Affiliation(s)
- Gasper Maeda
- Chemistry Department,
College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden
| | - Joan J. E. Munissi
- Chemistry Department,
College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Sofia Lindblad
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden
- Department of Chemistry − BMC, Uppsala
University, SE-751 23 Uppsala, Sweden
| | - Sandra Duffy
- Discovery Biology, Griffith Institute for Drug Discovery, Griffith University, Nathan Q1d 4111, Australia
| | - Jerry Pelletier
- Department of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada
| | - Vicky M. Avery
- Discovery Biology, Griffith Institute for Drug Discovery, Griffith University, Nathan Q1d 4111, Australia
| | - Stephen S. Nyandoro
- Chemistry Department,
College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
- 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
- Department of Chemistry − BMC, Uppsala
University, SE-751 23 Uppsala, Sweden
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14
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Maeda G, van der Wal J, Gupta AK, Munissi JJE, Orthaber A, Sunnerhagen P, Nyandoro SS, Erdélyi M. Oxygenated Cyclohexene Derivatives and Other Constituents from the Roots of Monanthotaxis trichocarpa. J Nat Prod 2020; 83:210-215. [PMID: 31986029 PMCID: PMC7343284 DOI: 10.1021/acs.jnatprod.9b00363] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Indexed: 05/26/2023]
Abstract
Three new oxygenated cyclohexene derivatives, trichocarpeols A (1), B (2), and C (3), along with nine known secondary metabolites, were isolated from the methanolic root extract of Monanthotaxis trichocarpa. They were identified by NMR spectroscopic and mass spectrometric analyses, and the structure of trichocarpeol A (1) was confirmed by single-crystal X-ray diffraction. Out of the 12 isolated natural products, uvaretin (4) showed activity against the Gram-positive bacterium Bacillus subtilis with a MIC value of 18 μM. None of the isolated metabolites was active against the Gram-negative Escherichia coli at a ∼5 mM (2000 μg/mL) concentration. Whereas 4 showed cytotoxicity at EC50 10.2 μM against the MCF-7 human breast cancer cell line, the other compounds were inactive or not tested.
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Affiliation(s)
- Gasper Maeda
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
- Department
of Chemistry - BMC, Uppsala University, SE-751 23 Uppsala, Sweden
| | - Jelle van der Wal
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, SE-412 96 Gothenburg, Sweden
- Center
for Antibiotic Resistance Research (CARe) at the University of Gothenburg, Box 440, 405 30 Gotheburg, Sweden
| | - Arvind Kumar Gupta
- Department
of Chemistry - BMC, Uppsala University, SE-751 23 Uppsala, Sweden
| | - Joan J. E. Munissi
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Andreas Orthaber
- Department
of Chemistry - Ångström, Uppsala
University, SE-751 20 Uppsala, Sweden
| | - Per Sunnerhagen
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, SE-412 96 Gothenburg, Sweden
- Center
for Antibiotic Resistance Research (CARe) at the University of Gothenburg, Box 440, 405 30 Gotheburg, Sweden
| | - Stephen S. Nyandoro
- Chemistry
Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Máté Erdélyi
- Department
of Chemistry - BMC, Uppsala University, SE-751 23 Uppsala, Sweden
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, SE-412 96 Gothenburg, Sweden
- Center
for Antibiotic Resistance Research (CARe) at the University of Gothenburg, Box 440, 405 30 Gotheburg, Sweden
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15
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Mohammed S, Munissi JJE, Nyandoro SS. Aflatoxins in sunflower seeds and unrefined sunflower oils from Singida, Tanzania. Food Addit Contam Part B Surveill 2018; 11:161-166. [PMID: 29486657 DOI: 10.1080/19393210.2018.1443519] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
A total of 61 samples comprising sunflower seeds (40) and unrefined sunflower oils (21) samples collected randomly from Singida, Tanzania were analysed by Reverse Phase-high performance liquid chromatography (RP-HPLC). 15% (6/40) of the seed samples were contaminated with aflatoxin B1 ranging from limit of detection (LOD) to 218 ng g-1 with three of them exceeding the European Commission/European Union (EC/EU) and Tanzania Bureau of Standards (TBS)/Tanzania Food and Drug Authority (TFDA) maximum limits of 2 ng g-1 for AFB1 in oilseeds. The levels of total aflatoxins (AFT) in seeds ranged from LOD to 243 ng g-1. Other aflatoxins, except AFG2, were also detected. For the unrefined sunflower oils, the levels of AFB1 ranged from LOD to 2.56 ng mL-1. About 80.9% (17/21) of the analysed oil samples contained AFB1 of which 17.65% (3/17) exceeded the EC/EU and TBS/TFDA maximum limits of 2 ng mL-1. Other aflatoxins were also detected in the oils. The measured levels indicate there is a need for food quality education among food processors.
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Affiliation(s)
- Salum Mohammed
- a Chemistry Department, College of Natural and Applied Sciences , University of Dar es Salaam , Dar es Salaam , Tanzania
| | - Joan J E Munissi
- a Chemistry Department, College of Natural and Applied Sciences , University of Dar es Salaam , Dar es Salaam , Tanzania
| | - Stephen S Nyandoro
- a Chemistry Department, College of Natural and Applied Sciences , University of Dar es Salaam , Dar es Salaam , Tanzania
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16
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Nyandoro SS, Munissi JJE, Kombo M, Mgina CA, Pan F, Gruhonjic A, Fitzpatrick P, Lu Y, Wang B, Rissanen K, Erdélyi M. Flavonoids from Erythrina schliebenii. J Nat Prod 2017; 80:377-383. [PMID: 28112509 DOI: 10.1021/acs.jnatprod.6b00839] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Prenylated and O-methylflavonoids including one new pterocarpan (1), three new isoflavones (2-4), and nineteen known natural products (5-23) were isolated and identified from the root, stem bark, and leaf extracts of Erythrina schliebenii. The crude extracts and their constituents were evaluated for antitubercular activity against Mycobacterium tuberculosis (H37Rv strain), showing MICs of 32-64 μg mL-1 and 36.9-101.8 μM, respectively. Evaluation of their toxicity against the aggressive human breast cancer cell line MDA-MB-231 indicated EC50 values of 13.0-290.6 μM (pure compounds) and 38.3 to >100 μg mL-1 (crude extracts).
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Affiliation(s)
- Stephen S Nyandoro
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam , P.O. Box 35061, Dar es Salaam, Tanzania
- Department of Chemistry and Molecular Biology, University of Gothenburg , Gothenburg SE-412 96, Sweden
| | - Joan J E Munissi
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam , P.O. Box 35061, Dar es Salaam, Tanzania
- Department of Chemistry and Molecular Biology, University of Gothenburg , Gothenburg SE-412 96, Sweden
| | - Msim Kombo
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam , P.O. Box 35061, Dar es Salaam, Tanzania
| | - Clarence A Mgina
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam , P.O. Box 35061, Dar es Salaam, Tanzania
| | - Fangfang Pan
- Department of Chemistry, Nanoscience Center, University of Jyvaskyla , P.O. Box. 35, FI-40014 University of Jyvaskyla, Finland
| | - Amra Gruhonjic
- Sahlgrenska Cancer Centre, University of Gothenburg , Gothenburg SE-405 30, Sweden
| | - Paul Fitzpatrick
- Sahlgrenska Cancer Centre, University of Gothenburg , Gothenburg SE-405 30, Sweden
| | - Yu Lu
- Beijing Key Laboratory of Drug Resistance Tuberculosis Research, Department of Pharmacology, Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumour Research Institute , Beijing 101149, People's Republic of China
| | - Bin Wang
- Beijing Key Laboratory of Drug Resistance Tuberculosis Research, Department of Pharmacology, Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumour Research Institute , Beijing 101149, People's Republic of China
| | - Kari Rissanen
- Department of Chemistry, Nanoscience Center, University of Jyvaskyla , P.O. Box. 35, FI-40014 University of Jyvaskyla, Finland
| | - Máté Erdélyi
- Department of Chemistry and Molecular Biology, University of Gothenburg , Gothenburg SE-412 96, Sweden
- Swedish NMR Centre, University of Gothenburg , Gothenburg SE-405 30, Sweden
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17
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Nyandoro SS, Munissi JJE, Gruhonjic A, Duffy S, Pan F, Puttreddy R, Holleran JP, Fitzpatrick PA, Pelletier J, Avery VM, Rissanen K, Erdélyi M. Polyoxygenated Cyclohexenes and Other Constituents of Cleistochlamys kirkii Leaves. J Nat Prod 2017; 80:114-125. [PMID: 28001067 DOI: 10.1021/acs.jnatprod.6b00759] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Thirteen new metabolites, including the polyoxygenated cyclohexene derivatives cleistodiendiol (1), cleistodienol B (3), cleistenechlorohydrins A (4) and B (5), cleistenediols A-F (6-11), cleistenonal (12), and the butenolide cleistanolate (13), 2,5-dihydroxybenzyl benzoate (cleistophenolide, 14), and eight known compounds (2, 15-21) were isolated from a MeOH extract of the leaves of Cleistochlamys kirkii. The purified metabolites were identified by NMR spectroscopic and mass spectrometric analyses, whereas the absolute configurations of compounds 1, 17, and 19 were established by single-crystal X-ray diffraction. The configuration of the exocyclic double bond of compound 2 was revised based on comparison of its NMR spectroscopic features and optical rotation to those of 1, for which the configuration was determined by X-ray diffraction. Observation of the co-occurrence of cyclohexenoids and heptenolides in C. kirkii is of biogenetic and chemotaxonomic significance. Some of the isolated compounds showed activity against Plasmodium falciparum (3D7, Dd2), with IC50 values of 0.2-40 μM, and against HEK293 mammalian cells (IC50 2.7-3.6 μM). While the crude extract was inactive at 100 μg/mL against the MDA-MB-231 triple-negative breast cancer cell line, some of its isolated constituents demonstrated cytotoxic activity with IC50 values ranging from 0.03-8.2 μM. Compound 1 showed the most potent antiplasmodial (IC50 0.2 μM) and cytotoxic (IC50 0.03 μM, MDA-MB-231 cell line) activities. None of the compounds investigated exhibited translational inhibitory activity in vitro at 20 μM.
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Affiliation(s)
- Stephen S Nyandoro
- Department of Chemistry, College of Natural and Applied Sciences, University of Dar es Salaam , P.O. Box 35061, Dar es Salaam, Tanzania
- Department of Chemistry and Molecular Biology, University of Gothenburg , SE-412 96 Gothenburg, Sweden
| | - Joan J E Munissi
- Department of Chemistry, College of Natural and Applied Sciences, University of Dar es Salaam , P.O. Box 35061, Dar es Salaam, Tanzania
| | - Amra Gruhonjic
- Department of Chemistry and Molecular Biology, University of Gothenburg , SE-412 96 Gothenburg, Sweden
- Sahlgrenska Cancer Centre, University of Gothenburg , Gothenburg, SE-405 30, Sweden
| | - Sandra Duffy
- Discovery Biology, Eskitis Institute for Drug Discovery, Griffith University , Nathan, Q1d 4111, Australia
| | - Fangfang Pan
- University of Jyvaskyla, Department of Chemistry, Nanoscience Center, University of Jyvaskyla , P.O. Box. 35, Jyvaskyla FI-40014, Finland
| | - Rakesh Puttreddy
- University of Jyvaskyla, Department of Chemistry, Nanoscience Center, University of Jyvaskyla , P.O. Box. 35, Jyvaskyla FI-40014, Finland
| | - John P Holleran
- Discovery Biology, Eskitis Institute for Drug Discovery, Griffith University , Nathan, Q1d 4111, Australia
| | - Paul A Fitzpatrick
- Sahlgrenska Cancer Centre, University of Gothenburg , Gothenburg, SE-405 30, Sweden
| | - Jerry Pelletier
- Department of Biochemistry, McGill University , Montreal, QC, H3G 1Y6, Canada
| | - Vicky M Avery
- Discovery Biology, Eskitis Institute for Drug Discovery, Griffith University , Nathan, Q1d 4111, Australia
| | - Kari Rissanen
- University of Jyvaskyla, Department of Chemistry, Nanoscience Center, University of Jyvaskyla , P.O. Box. 35, Jyvaskyla FI-40014, Finland
| | - Máté Erdélyi
- Department of Chemistry and Molecular Biology, University of Gothenburg , SE-412 96 Gothenburg, Sweden
- Swedish NMR Centre, University of Gothenburg , Gothenburg, SE-405 30, Sweden
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Mohammed S, Munissi JJE, Nyandoro SS. Aflatoxin M1in raw milk and aflatoxin B1in feed from household cows in Singida, Tanzania. Food Additives & Contaminants: Part B 2016; 9:85-90. [DOI: 10.1080/19393210.2015.1137361] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Aronsson P, Munissi JJE, Gruhonjic A, Fitzpatrick PA, Landberg G, Nyandoro SS, Erdelyi M. Phytoconstituents with Radical Scavenging and Cytotoxic Activities from Diospyros shimbaensis. Diseases 2016; 4:diseases4010003. [PMID: 28933383 PMCID: PMC5456303 DOI: 10.3390/diseases4010003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 12/30/2015] [Accepted: 12/30/2015] [Indexed: 12/12/2022] Open
Abstract
As part of our search for natural products having antioxidant and anticancer properties, the phytochemical investigation of Diospyros shimbaensis (Ebenaceae), a plant belonging to a genus widely used in East African traditional medicine, was carried out. From its stem and root barks the new naphthoquinone 8,8'-oxo-biplumbagin (1) was isolated along with the known tetralones trans-isoshinanolone (2) and cis-isoshinanolone (3), and the naphthoquinones plumbagin (4) and 3,3'-biplumbagin (5). Compounds 2, 4, and 5 showed cytotoxicity (IC50 520-82.1 μM) against MDA-MB-231 breast cancer cells. Moderate to low cytotoxicity was observed for the hexane, dichloromethane, and methanol extracts of the root bark (IC50 16.1, 29.7 and > 100 μg/mL, respectively), and for the methanol extract of the stem bark (IC50 59.6 μg/mL). The radical scavenging activity of the isolated constituents (1-5) was evaluated on the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay. The applicability of the crude extracts and of the isolated constituents for controlling degenerative diseases is discussed.
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Affiliation(s)
- Per Aronsson
- Department of Chemistry and Molecular Biology, University of Gothenburg, Gothenburg SE-412 96, Sweden.
| | - Joan J E Munissi
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box. 35061, Dar es Salaam 0255, Tanzania.
| | - Amra Gruhonjic
- Department of Chemistry and Molecular Biology, University of Gothenburg, Gothenburg SE-412 96, Sweden.
- Sahlgrenska Cancer Center, University of Gothenburg, Gothenburg SE-405 30, Sweden.
| | - Paul A Fitzpatrick
- Sahlgrenska Cancer Center, University of Gothenburg, Gothenburg SE-405 30, Sweden.
| | - Göran Landberg
- Sahlgrenska Cancer Center, University of Gothenburg, Gothenburg SE-405 30, Sweden.
| | - Stephen S Nyandoro
- Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box. 35061, Dar es Salaam 0255, Tanzania.
| | - Mate Erdelyi
- Department of Chemistry and Molecular Biology, University of Gothenburg, Gothenburg SE-412 96, Sweden.
- Swedish NMR Center, University of Gothenburg, Gothenburg SE-405 30, Sweden.
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Baraza LD, Joseph CC, Munissi JJE, Nkunya MHH, Arnold N, Porzel A, Wessjohann L. Antifungal rosane diterpenes and other constituents of Hugonia castaneifolia. Phytochemistry 2008; 69:200-5. [PMID: 17688894 DOI: 10.1016/j.phytochem.2007.06.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2007] [Revised: 06/16/2007] [Accepted: 06/19/2007] [Indexed: 05/16/2023]
Abstract
The rosane diterpenoids hugorosenone [3beta-hydroxyrosa-1(10),15-dien-2-one], 18-hydroxyhugorosenone and 18-hydroxy-3-deoxyhugorosenone, and 12-hydroxy-13-methylpodocarpa-8,11,13-trien-3-one were isolated as antifungal constituents of H. castaneifolia Engl. root bark, together with the previously reported di-podocarpanoids hugonone A and hugonone B that were weakly active, and 1(10),15-rosadiene-2beta,3beta-diol (hugorosenol), 4alpha-methoxyhimachal-10-en-5beta-ol (hugonianene B) and 2-hydroxyhenpentacont-2-enal, and the known compounds tetracosyl-(E)-ferrulate and caryophyllene oxide, all of which were inactive. Hugorosenone also exhibited activity against Anopheles gambiae mosquito larvae. Structural determination was achieved based on spectroscopic data.
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Affiliation(s)
- Lilechi D Baraza
- Department of Chemistry, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
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