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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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Evidente A. The incredible story of ophiobolin A and sphaeropsidin A: two fungal terpenes from wilt-inducing phytotoxins to promising anticancer compounds. Nat Prod Rep 2024; 41:434-468. [PMID: 38131643 DOI: 10.1039/d3np00035d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Covering: 2000 to 2023This review presents the exceptional story of ophiobolin A (OphA) and sphaeropsidin A (SphA), a sesterterpene and a diterpene, respectively, which were initially isolated as fungal phytotoxins and subsequently shown to possess other interesting biological activities, including promising anticancer activities. Ophiobolin A is a phytotoxin produced by different fungal pathogens, all belonging to the Bipolaris genus. Initially, it was only known as a very dangerous phytotoxin produced by fungi attacking essential cereals, such as rice and barley. However, extensive and interesting studies were carried out to define its original carbon skeleton, which is characterized by a typical 5 : 8 : 5 ring system and shared with fusicoccins and cotylenins, and its phytotoxic activity on host and non-host plants. The biosynthesis of OphA was also defined by describing the different steps starting from mevalonate and through the rearrangement of the acyclic C-25 precursor lead the toxin is obtained. OphA was also produced as a bioherbicide from Drechslera gigantea and proposed for the biocontrol of the widespread and dangerous weed Digitaria sanguinaria. To date, more than sixty ophiobolins have been isolated from different fungi and their biological activities and structure-activity relationship investigated, which were also described using their hemisynthetic derivatives. In the last two decades, thorough studies have been performed on the potential anticancer activity of OphA and its original mode of action, attracting great interest from scientists. Sphaeropsidin A has a similar story. It was isolated as the main phytotoxin from Diplodia cupressi, the causal agent of Italian cypress canker disease, resulting in the loss of millions of plants in a few years in the Mediterranean basin. The damage to the forest, environment and ornamental heritage are noteworthy and economic losses are also suffered by tree nurseries and the wood industry. Six natural analogues of SphA were isolated and several interesting hemisynthetic derivatives were prepared to study its structure-activity relationship. Surprisingly, sphaeropsidin A showed other interesting biological activities, including antibiotic, antifungal, and antiviral. In the last decade, extensive studies have focused on the anticancer activity and original mode of action of SphA. Furthermore, specific hemisynthetic studies enable the preparation of derivatives of SphA, preserving its chromophore, which showed a noteworthy increase in anticancer activity. It has been demonstrated that ophiobolin A and sphaeropsidin A are promising natural products showing potent activity against some malignant cancers, such as brain glioblastoma and different melanomas.
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Affiliation(s)
- Antonio Evidente
- Institute of Sciences of Food Production, National Research Council, Via Amendola 122/O, 70125 Bari, Italy.
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Liang C, Hu C, Nie P, Liu Y, Liu J, Du Y. Bioinspired synthesis and biological evaluation of ent-protulactones A and B. Org Biomol Chem 2023; 22:175-183. [PMID: 38053497 DOI: 10.1039/d3ob01708g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
The bioinspired and stereoselective synthesis of the furo[3,2-b] furan lactone (-)-protulactone A and the dioxabicyclo[3.3.1]nonane lactone (+)-protulactone B has been achieved based on the chiron approach. The synthesis features the utilization of a number of one-pot, sequential transformations, including a cascade reaction of reductive elimination and nucleophilic addition in a one-pot process and a one-pot sequence via cross-metathesis/acetonide deprotection/O-Michael addition/lactonization to streamline the synthesis route and avoid the tedious work of product purification. Synthetic protulactones and their analogues were evaluated for their in vitro antiproliferative activity against selected tumor cell lines (MCF-7 and Capan 2) and showed minor cytotoxicity.
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Affiliation(s)
- Changxu Liang
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chao Hu
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Pengpeng Nie
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuanfang Liu
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jun Liu
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Binzhou Institute of Technology, Weiqiao-UCAS Science and Technology Park, Binzhou 256606, Shandong Province, China
| | - Yuguo Du
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Binzhou Institute of Technology, Weiqiao-UCAS Science and Technology Park, Binzhou 256606, Shandong Province, China
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Oduro-Mensah D, Lowor ST, Bukari Y, Donkor JK, Minnah B, Nuhu AH, Dontoh D, Amadu AA, Ocloo A. Cocoa-associated filamentous fungi for the biocontrol of aflatoxigenic Aspergillus flavus. J Basic Microbiol 2023; 63:1279-1292. [PMID: 37485741 DOI: 10.1002/jobm.202300163] [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: 03/31/2023] [Revised: 05/30/2023] [Accepted: 07/01/2023] [Indexed: 07/25/2023]
Abstract
Aflatoxin and other mycotoxin contamination are major threats to global food security and present an urgent need to secure the global food crop against spoilage by mycotoxigenic fungi. Cocoa material is noted for naturally low aflatoxin contamination. This study was designed to assess the potential for harnessing cocoa-associated filamentous fungi for the biocontrol of aflatoxigenic Aspergillus flavus. The candidate fungi were isolated from fermented cocoa beans collected from four cocoa-growing areas in Ghana. Molecular characterization included Internal Transcribed Spacer (ITS)-sequencing for identification and polymer chain reaction (PCR) to determine mating type. Effects of the candidate isolates on growth and aflatoxin-production by an aflatoxigenic A. flavus isolate (BANGA1) were assessed. Aflatoxin production was monitored by UV fluorescence and quantified by enzyme-linked immunosorbent assay (ELISA). Thirty-six filamentous fungi were cultured and identified as Aspergillus, Cladosporium, Lichtheimia, or Trichoderma spp. isolates. The isolates generally interacted negatively with BANGA1 growth and aflatoxin production. The Aspergillus niger and Aspergillus aculeatus biocontrol candidates showed the strongest colony antagonism (54%-94%) and reduction in aflatoxin production (12%-50%) on agar. In broth, the A. niger isolates reduced aflatoxin production by up to 97%. Metabolites from the A. niger isolates showed the strongest inhibition of growth by BANGA1 and inhibited aflatoxin production. Four of the candidate isolates belonged to the MAT1-1 mating type and 12 identified as MAT1-2. This may be indicative of the potential for genetic recombination events between fungi in the field, a finding which is particularly relevant to the risk posed by A. flavus biocontrol measures that rely on atoxigenic A. flavus strains.
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Affiliation(s)
- Daniel Oduro-Mensah
- Department of Biochemistry, Cell and Molecular Biology, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana
- African Centre of Excellence for Mycotoxin and Food Safety, Federal University of Technology, Minna, Niger State, Nigeria
| | - Sammy T Lowor
- Physiology/Biochemistry Division, Cocoa Research Institute of Ghana, New Tafo-Akim, Ghana
| | - Yahaya Bukari
- Plant Pathology Division, Cocoa Research Institute of Ghana, New Tafo-Akim, Ghana
| | - Jacob Kwaku Donkor
- Department of Biochemistry, Cell and Molecular Biology, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana
| | - Bismark Minnah
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana
| | - Abdul Hamid Nuhu
- Department of Biochemistry, Cell and Molecular Biology, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana
- Mycotoxins and Histamines Laboratory, Ghana Standards Authority, Accra, Ghana
| | - Derry Dontoh
- Mycotoxins and Histamines Laboratory, Ghana Standards Authority, Accra, Ghana
| | - Ayesha Algade Amadu
- Council for Scientific and Industrial Research-Water Research Institute, Ghana
- Environmental Biology and Health Division, Nanjing University of Science and Technology, Nanjing, Jiangsu Province, China
| | - Augustine Ocloo
- Department of Biochemistry, Cell and Molecular Biology, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana
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Kim DY, Han JW, Lee JW, Kim B, Kim YS, Kim HT, Choi GJ, Kim H. Biocontrol potential of Chitinophaga flava HK235 producing antifungal-related peptide chitinocin. Front Microbiol 2023; 14:1170673. [PMID: 37283917 PMCID: PMC10239826 DOI: 10.3389/fmicb.2023.1170673] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 05/05/2023] [Indexed: 06/08/2023] Open
Abstract
Botrytis cinerea is a necrotrophic fungal pathogen with an extremely broad host range, causing significant economic losses in agricultural production. In this study, we discovered a culture filtrate of bacterial strain HK235, which was identified as Chitinophaga flava, exhibiting high levels of antifungal activity against B. cinerea. From the HK235 culture filtrate, we isolated a new antimicrobial peptide molecule designated as chitinocin based on activity-guided fractionation followed by characterization of the amino acid composition and spectroscopic analyses. The HK235 culture filtrate and chitinocin completely inhibited both conidial germination and mycelial growth of B. cinerea at a concentration of 20% and 200 μg/mL, respectively. In addition to antibiosis against B. cinerea, the active compound chitinocin had a broad antifungal and antibacterial activity in vitro. When tomato plants were treated with the culture filtrate and chitinocin, the treatment strongly reduced the development of gray mold disease in a concentration-dependent manner compared to the untreated control. Here, considering the potent antifungal property in vitro and in vivo, we present the biocontrol potential of C. flava HK235 for the first time.
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Affiliation(s)
- Da Yeon Kim
- Center for Eco-Friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon, South Korea
- Department of Plant Medicine, Chungbuk National University, Cheongju, South Korea
| | - Jae Woo Han
- Center for Eco-Friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon, South Korea
| | - Jin Woo Lee
- Center for Eco-Friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon, South Korea
- Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon, South Korea
| | - Bomin Kim
- Center for Eco-Friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon, South Korea
- Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon, South Korea
| | - Yeong Seok Kim
- Center for Eco-Friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon, South Korea
- Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon, South Korea
| | - Heung-Tae Kim
- Department of Plant Medicine, Chungbuk National University, Cheongju, South Korea
| | - Gyung Ja Choi
- Center for Eco-Friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon, South Korea
- Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon, South Korea
| | - Hun Kim
- Center for Eco-Friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon, South Korea
- Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon, South Korea
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Djokić S, Francuz J, Popsavin M, Rodić MV, Kojić V, Stevanović M, Popsavin V. Natural product protulactone A: Total synthesis from D-galactose, X-ray analysis and biological evaluation. Bioorg Chem 2022; 127:105980. [DOI: 10.1016/j.bioorg.2022.105980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/30/2022] [Accepted: 06/19/2022] [Indexed: 11/16/2022]
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Sa R, He S, Han D, Liu M, Yu Y, Shang R, Song M. Isolation and identification of a new biocontrol bacteria against Salvia miltiorrhiza root rot and optimization of culture conditions for antifungal substance production using response surface methodology. BMC Microbiol 2022; 22:231. [PMID: 36180825 PMCID: PMC9524000 DOI: 10.1186/s12866-022-02628-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 08/25/2022] [Indexed: 11/10/2022] Open
Abstract
Background S. miltiorrhiza root rot is a soil-borne disease mainly caused by Fusarium solani and Fusarium oxysporum, which has spread rapidly in China in recent years. To reduce the amount of pesticides to control this plant fungal disease, biological control using endophytic bacteria is a promising method. Many endophytic bacteria show good biocontrol potential against various plant fungal diseases. The aims of this study were to isolate and identify endophytic bacteria with antifungal activity from Salvia miltiorrhiza plant tissue. In order to increase antifungal substances production, the culture conditions of the isolated DS-R5 strain were optimized through response surface methodology. Results Thirteen endophytic bacteria with antifungal activity against the target pathogenic fungus were successfully screened. The DS-R5 strain that had the strongest antifungal activity was identified based on morphological, physiological and biochemical characteristics, 16S rRNA and gyrB sequence analysis.The results of response surface methodology experiments showed that the optimal values of the three significant factors were as follows: medium volume, 51.0 ml; initial pH, 6.7; fermentation temperature, 33.1 °C. Under these optimal culture conditions, the titer of antifungal substances produced by the DS-R5 strain was 77.6% higher than that under the initial culture conditions. Conclusions The antifungal activity of endophytic bacteria from Salvia miltiorrhiza has been demonstrated for the first time, which may benefit future crop quality and production. In addition, response surface methodology can be well applied the optimization of culture conditions for antifungal substance, which lays the foundation for further research on strain DS-R5.
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Affiliation(s)
- Rongbo Sa
- Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, China
| | - Song He
- Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, China
| | - Dongdong Han
- Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, China
| | - Mengjiao Liu
- Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, China
| | - Yunxia Yu
- Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, China
| | - Rongen Shang
- Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, China
| | - Meimei Song
- Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, China.
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Nguyen MV, Han JW, Kim H, Choi GJ. Phenyl Ethers from the Marine-Derived Fungus Aspergillus tabacinus and Their Antimicrobial Activity Against Plant Pathogenic Fungi and Bacteria. ACS OMEGA 2022; 7:33273-33279. [PMID: 36157764 PMCID: PMC9494657 DOI: 10.1021/acsomega.2c03859] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 08/24/2022] [Indexed: 06/06/2023]
Abstract
Marine fungi produce various secondary metabolites with unique chemical structures and diverse biological activities. In the continuing search for new antifungal agents from fungi isolated from marine environments, the culture filtrate of a fungus Aspergillus tabacinus SFC20160407-M11 exhibited the potential to control plant diseases caused by fungi. From the culture filtrate of A. tabacinus SFC20160407-M11, a total of seven compounds were isolated and identified by activity-guided column chromatography and spectroscopic analysis: violaceol I (1), violaceol II (2), diorcinol (3), versinol (4), orcinol (5), orsellinic acid (6), and sydowiol C (7). Based on in vitro bioassays against 17 plant pathogenic fungi and bacteria, violaceols and diorcinol (1-3) showed a broad spectrum of antimicrobial activity with minimum inhibitory concentration values in the range of 6.3-200 μg mL-1. These compounds also effectively reduced the development of rice blast, tomato late blight, and pepper anthracnose caused by plant pathogenic fungi in a dose-dependent manner. Our results suggest that A. tabacinus SFC20160407-M11 and its phenyl ether compounds could be used for developing new antimicrobial agents to protect crops from plant pathogens.
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Affiliation(s)
- Minh Van Nguyen
- Center
for Eco-friendly New Materials, Korea Research
Institute of Chemical Technology, Daejeon 34114, Korea
- Division
of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon 34113, Korea
| | - Jae Woo Han
- Center
for Eco-friendly New Materials, Korea Research
Institute of Chemical Technology, Daejeon 34114, Korea
| | - Hun Kim
- Center
for Eco-friendly New Materials, Korea Research
Institute of Chemical Technology, Daejeon 34114, Korea
- Division
of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon 34113, Korea
| | - Gyung Ja Choi
- Center
for Eco-friendly New Materials, Korea Research
Institute of Chemical Technology, Daejeon 34114, Korea
- Division
of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon 34113, Korea
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Curvicollide D, a new modified γ-lactone from the culture broth of Albifimbria verrucaria and its antifungal activity against plant pathogenic fungi. J Antibiot (Tokyo) 2022; 75:514-518. [DOI: 10.1038/s41429-022-00541-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 06/18/2022] [Accepted: 06/24/2022] [Indexed: 11/09/2022]
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