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Santos AL, Ionta M, Horvath RO, Soares MG, Silva DO, Kawafune ES, Ferreira MJP, Sartorelli P. Dereplication of Cytochalasans and Octaketides in Cytotoxic Extracts of Endophytic Fungi from Casearia arborea (Salicaceae). Metabolites 2022; 12:metabo12100903. [PMID: 36295805 PMCID: PMC9611219 DOI: 10.3390/metabo12100903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 09/15/2022] [Accepted: 09/16/2022] [Indexed: 11/16/2022] Open
Abstract
Endophytes have been shown to be a source of novel drug prototypes. The Casearia genus is known for presenting cytotoxic clerodane diterpenes; however, there are few reports on secondary metabolites produced by its fungal microbiota. Thus, in the present study endophytic fungi obtained from the fresh leaves of C. arborea were grown in potato dextrose broth and rice to perform a secondary metabolite prospection study. The cytotoxic profile of the crude extracts at 10 µg/mL was determined by a colorimetric assay on tumor cell lines. The endophytes producing cytotoxic extracts were identified through phylogenetic analysis and belong to Diaporthe and Colletotrichum species. Metabolites present in these extracts were organized in molecular networking format based on HRMS-MS, and a dereplication process was performed to target compounds for chromatographic purification. Metabolic classes, such as lipids, peptides, alkaloids, and polyketides were annotated, and octaketide and cytochalasin derivatives were investigated. Cytochalasin H was purified from the cytotoxic Diaporthe sp. CarGL8 extract and its cytotoxic activity was determined on human cancer cell lines A549, MCF-7, and HepG2. The data collected in the present study showed that molecular networking is useful to understand the chemical profile of complex matrices to target compounds, minimizing the cost and time spent in purification processes.
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Affiliation(s)
- Augusto L. Santos
- Institute of Environmental, Chemical and Pharmaceutical Sciences, Federal University of São Paulo, São Paulo 09972-270, Brazil
| | - Marisa Ionta
- Institute of Biomedical Science, Federal University of Alfenas, Minas Gerais 37130-000, Brazil
| | - Renato O. Horvath
- Institute of Biomedical Science, Federal University of Alfenas, Minas Gerais 37130-000, Brazil
| | - Marisi G. Soares
- Institute of Chemistry, Federal University of Alfenas, Minas Gerais 37130-000, Brazil
| | - Daniele O. Silva
- Institute of Chemistry, Federal University of Alfenas, Minas Gerais 37130-000, Brazil
| | - Eunizinis S. Kawafune
- Botany Department, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil
| | - Marcelo J. P. Ferreira
- Botany Department, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil
- Correspondence: (M.J.P.F.); (P.S.)
| | - Patricia Sartorelli
- Institute of Environmental, Chemical and Pharmaceutical Sciences, Federal University of São Paulo, São Paulo 09972-270, Brazil
- Correspondence: (M.J.P.F.); (P.S.)
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Nguyen HTT, Truong NB, Doan HTM, Litaudon M, Retailleau P, Do TT, Nguyen HV, Chau MV, Pham CV. Cytotoxic Clerodane Diterpenoids from the Leaves of Casearia grewiifolia. JOURNAL OF NATURAL PRODUCTS 2015; 78:2726-2730. [PMID: 26516994 DOI: 10.1021/acs.jnatprod.5b00677] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Two new clerodane diterpenoids (1 and 2) and the known compound caseanigrescen D (3) were isolated from the leaves of Casearia grewiifolia by bioassay-guided fractionation. Their structures were determined by analyses of MS and 2D NMR data. The absolute configurations of 1 and 3 were established by analysis of X-ray diffraction data. Compounds 1-3 were evaluated for their cytotoxicity against four cancer cell lines, KB (mouth epidermal carcinoma cells), HepG-2 (human liver hepatocellular carcinoma cells), LU-1 (human lung adenocarcinoma cells), and MCF-7 (human breast cancer cells). Caseagrewifolin B (2) had inhibitory activity against KB and HepG-2 cell lines with IC50 values of 6.2 to 7.0 μM, respectively. When tested against the normal cells (NIH/3T3), caseagrewifolin B (2) exhibited a significant selective inhibition against cancer cells in comparison with the normal cells. Caseanigrescen D (3) was cytotoxic against four cancer cell lines; however it had no selective inhibition compared with normal cells.
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Affiliation(s)
- Ha T T Nguyen
- Institute of Marine Biochemistry of the Vietnam Academy of Science and Technology (VAST) , 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam
| | - Ngan B Truong
- Institute of Marine Biochemistry of the Vietnam Academy of Science and Technology (VAST) , 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam
| | - Huong T M Doan
- Institute of Marine Biochemistry of the Vietnam Academy of Science and Technology (VAST) , 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam
| | - Marc Litaudon
- Institut de Chimie des Substances Naturelles, CNRS-ICSN, UPR 2301, Université Paris-Sud , 91198, Gif-sur-Yvette, France
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, CNRS-ICSN, UPR 2301, Université Paris-Sud , 91198, Gif-sur-Yvette, France
| | - Thao T Do
- Institute of Biotechnology of the Vietnam Academy of Science and Technology (VAST) , 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam
| | - Hung V Nguyen
- Institute of Marine Biochemistry of the Vietnam Academy of Science and Technology (VAST) , 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam
| | - Minh V Chau
- Institute of Marine Biochemistry of the Vietnam Academy of Science and Technology (VAST) , 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam
| | - Cuong V Pham
- Institute of Marine Biochemistry of the Vietnam Academy of Science and Technology (VAST) , 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam
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