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Ngo MT, Han JW, Nguyen MV, Choi Y, Kim B, Gho ES, Kim H, Choi GJ. Discovery of Novel Antioomycete Metabolites from the Marine-Derived Fungus Paraconiothyrium sporulosum. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:16359-16367. [PMID: 39011851 DOI: 10.1021/acs.jafc.4c04706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/17/2024]
Abstract
In our screening program for natural products that are effective in controlling plant diseases, we found that the culture filtrate of Paraconiothyrium sporulosum SFC20160907-M11 effectively suppressed the development of tomato late blight disease caused by Phytophthora infestans. Using a bioassay-guided fractionation of antioomycete activity, 12 active compounds (1-12) were obtained from an ethyl acetate extract of the culture filtrate. Chemical structures of five new compounds 1-5 were determined by the extensive analyses of nuclear magnetic resonance (NMR), high resolution mass spectrometry (HRMS), and circular dichroism (CD) data. Interestingly, mycosporulonol (1) and botrallin (8) completely inhibited the growth of P. infestans at concentrations of 8 and 16 μg/mL, respectively. Furthermore, the spray treatment of 1 and 8 (500 μg/mL) successfully protected tomato seedlings against P. infestans with disease control values of 92%. Taken together, these results suggest that the culture filtrates of P. sporulosum SFC20160907-M11 and their bioactive metabolites can be used as new antioomycete agents for Phytophthora late blight control.
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Affiliation(s)
- Men Thi Ngo
- Center for Eco-friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
- Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Jae Woo Han
- Center for Eco-friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Minh Van Nguyen
- Center for Eco-friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
- Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Yugyeong Choi
- Center for Eco-friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Bomin Kim
- Center for Eco-friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
- Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Eun Sol Gho
- Center for Eco-friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
- Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Hun Kim
- Center for Eco-friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
- Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Gyung Ja Choi
- Center for Eco-friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
- Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon 34113, Republic of Korea
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Morehouse NJ, Flewelling AJ, Liu DY, Cavanagh H, Linington RG, Johnson JA, Gray CA. Tolypocaibols: Antibacterial Lipopeptaibols from a Tolypocladium sp. Endophyte of the Marine Macroalga Spongomorpha arcta. JOURNAL OF NATURAL PRODUCTS 2023; 86:1529-1535. [PMID: 37313957 DOI: 10.1021/acs.jnatprod.3c00233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Two new lipopeptaibols, tolypocaibols A (1) and B (2), and the mixed NRPS-polyketide-shikimate natural product maximiscin [(P/M)-3)] were isolated from a Tolypocladium sp. fungal endophyte of the marine alga Spongomorpha arcta. Analysis of NMR and mass spectrometry data revealed the amino acid sequences of the lipopeptaibols, which both comprise 11 residues with a valinol C-terminus and a decanoyl acyl chain at the N-terminus. The configuration of the amino acids was determined by Marfey's analysis. Tolypocaibols A (1) and B (2) showed moderate, selective inhibition against Gram-positive and acid-fast bacterial strains, while maximiscin [(P/M)-3)] showed moderate, broad-spectrum antibiotic activity.
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Affiliation(s)
- Nicholas J Morehouse
- Department of Biological Sciences, University of New Brunswick, Saint John, New Brunswick E2K 5E2, Canada
| | - Andrew J Flewelling
- Department of Biological Sciences, University of New Brunswick, Saint John, New Brunswick E2K 5E2, Canada
| | - Dennis Y Liu
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Hannah Cavanagh
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Roger G Linington
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - John A Johnson
- Department of Biological Sciences, University of New Brunswick, Saint John, New Brunswick E2K 5E2, Canada
| | - Christopher A Gray
- Department of Biological Sciences, University of New Brunswick, Saint John, New Brunswick E2K 5E2, Canada
- Department of Chemistry, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada
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Taritla S, Kumari M, Kamat S, Bhat SG, Jayabaskaran C. Optimization of PhysicoChemical Parameters for Production of Cytotoxic Secondary Metabolites and Apoptosis Induction Activities in the Culture Extract of a Marine Algal-Derived Endophytic Fungus Aspergillus sp. Front Pharmacol 2021; 12:542891. [PMID: 33981211 PMCID: PMC8108993 DOI: 10.3389/fphar.2021.542891] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 02/17/2021] [Indexed: 01/20/2023] Open
Abstract
The endophytic fungal community in the marine ecosystem has been demonstrated to be relevant source of novel and pharmacologically active secondary metabolites. The current study focused on the evaluation of cytotoxic and apoptosis induction potential in the culture extracts of endophytic fungi associated with Sargassum muticum, a marine brown alga. The cytotoxicity of the four marine endophytes, Aspergillus sp., Nigrospora sphaerica, Talaromyces purpureogenus, and Talaromyces stipitatus, was evaluated by the MTT assay on HeLa cells. Further, several physicochemical parameters, including growth curve, culture media, and organic solvents, were optimized for enhanced cytotoxic activity of the selected extract. The Aspergillus sp. ethyl acetate extract (ASE) showed maximum cytotoxicity on multiple cancer cell lines. Chemical investigation of the metabolites by gas chromatography–mass spectroscopy (GC-MS) showed the presence of several compounds, including quinoline, indole, 2,4-bis(1,1-dimethylethyl) phenol, and hexadecenoic acid, known to be cytotoxic in ASE. The ASE was then tested for cytotoxicity in vitro on a panel of six human cancer cell lines, namely, HeLa (cervical adenocarcinoma), MCF-7 (breast adenocarcinoma), Hep G2 (hepatocellular carcinoma), A-549 (lung carcinoma), A-431 (skin/epidermis carcinoma), and LN-229 (glioblastoma). HeLa cells were most vulnerable to ASE treatment with an IC50 value of 24 ± 2 μg/ml. The mechanism of cytotoxicity exhibited by the ASE was further investigated on Hela cells. The results showed that the ASE was capable of inducing apoptosis in HeLa cells through production of reactive oxygen species, depolarization of mitochondrial membrane, and activation of the caspase-3 pathway, which shows a possible activation of the intrinsic apoptosis pathway. It also arrested the HeLa cells at the G2/M phase of the cell cycle, eventually leading to apoptosis. Through this study, we add to the knowledge about the marine algae associated with fungal endophytes and report its potential for purifying specific compounds responsible for cytotoxicity.
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Affiliation(s)
- Sidhartha Taritla
- Department of Biochemistry, Indian Institute of Science, Bangalore, India
| | - Madhuree Kumari
- Department of Biochemistry, Indian Institute of Science, Bangalore, India
| | - Siya Kamat
- Department of Biochemistry, Indian Institute of Science, Bangalore, India
| | - Sarita G Bhat
- Department of Biotechnology, Cochin University of Science and Technology, Kochi, India
| | - C Jayabaskaran
- Department of Biochemistry, Indian Institute of Science, Bangalore, India
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Clark TN, Ellsworth KT, Jean S, Webster D, Robichaud GA, Johnson JA, Graya CA. Isolation of Phomopsolide A and 6(E)-Phomopsolide A as Antimycobacterial Products from an Unidentified Endophyte of the Canadian Medicinal Plant Heracleum maximum. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501001005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
An extract of an unidentified endophyte from the Canadian medicinal plant Heracleum maximum exhibited a unique metabolomic profile and significant antimycobacterial activity against Mycobacterium tuberculosis H37Ra. Bioassay guided fractionation of the extract led to the isolation of phomopsolide A (1) and 6(E’)-phomopsolide A (2). This is the first report of antimycobacterial activity for 1 and 2.
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Affiliation(s)
- Trevor N. Clark
- Department of Biology, University of New Brunswick, 100 Tucker Park Rd, Saint John, NB, Canada, E2L 4L5
| | - Katelyn T. Ellsworth
- Department of Biology, University of New Brunswick, 100 Tucker Park Rd, Saint John, NB, Canada, E2L 4L5
| | - Stephanie Jean
- Department of Chemistry and Biochemistry, Universite de Moncton, Moncton, New Brunswick, Canada El A 3E9
- Atlantic Cancer Research Institute, Moncton, New Brunswick, Canada E1C 8X3
| | - Duncan Webster
- Department of Medicine, Division of Infectious Diseases, Saint John Regional Hospital, Saint John, New Brunswick, Canada E2L 4L2
| | - Gilles A. Robichaud
- Department of Chemistry and Biochemistry, Universite de Moncton, Moncton, New Brunswick, Canada El A 3E9
- Atlantic Cancer Research Institute, Moncton, New Brunswick, Canada E1C 8X3
| | - John A. Johnson
- Department of Biology, University of New Brunswick, 100 Tucker Park Rd, Saint John, NB, Canada, E2L 4L5
| | - Christopher A. Graya
- Department of Biology, University of New Brunswick, 100 Tucker Park Rd, Saint John, NB, Canada, E2L 4L5
- Department of Chemistry, University of New Brunswick, 30 Dineen Dr, Fredericton, NB, Canada, E3B 5A3
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