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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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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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