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Podlech J. Natural resorcylic lactones derived from alternariol. Beilstein J Org Chem 2024; 20:2171-2207. [PMID: 39224229 PMCID: PMC11368053 DOI: 10.3762/bjoc.20.187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Accepted: 08/06/2024] [Indexed: 09/04/2024] Open
Abstract
In this overview, naturally occurring resorcylic lactones biosynthetically derived from alternariol and almost exclusively produced by fungi, are discussed with view on their isolation, structure, biological activities, biosynthesis, and total syntheses. This class of compounds consists until now of 127 naturally occurring compounds, with very divers structural motifs. Although only a handful of these toxins (i.e., alternariol and its 9-O-methyl ether, altenusin, dehydroaltenusin, altertenuol, and altenuene) were frequently found and isolated as fungal contaminants in food and feed and have been investigated in significant detail, further metabolites, which were much more rarely found as natural products, similarly show interesting biological activities.
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Affiliation(s)
- Joachim Podlech
- Karlsruhe Institute of Technology (KIT), Institute of Organic Chemistry, Kaiserstraße 12, 76131 Karlsruhe, Germany
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2
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Yin CL, Qin RZ, Qin HL. One-Pot Three-Component Synthesis of Indolyl-4 H-chromene-3-sulfonyl Fluoride: A Class of Important Pharmacophore. J Org Chem 2024; 89:3618-3628. [PMID: 38358945 DOI: 10.1021/acs.joc.3c02706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
A one-pot, sequential three-component reaction between salicylaldehyde, indole, and 2-bromoprop-2-ene-1-sulfonyl fluoride (BPESF) has been demonstrated for the synthesis of sulfonyl fluoride substituted 4H-chromene derivatives in moderate to excellent yields (45%-94%). This one-pot sequential method features easily available starting materials, wide substrate scope, mild conditions, and great efficiency.
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Affiliation(s)
- Cheng-Lin Yin
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, People's Republic of China
| | - Richard Zijian Qin
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, People's Republic of China
| | - Hua-Li Qin
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, People's Republic of China
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3
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Molnár A, Knapp DG, Lovas M, Tóth G, Boldizsár I, Váczy KZ, Kovács GM. Untargeted metabolomic analyses support the main phylogenetic groups of the common plant-associated Alternaria fungi isolated from grapevine (Vitis vinifera). Sci Rep 2023; 13:19298. [PMID: 37935846 PMCID: PMC10630412 DOI: 10.1038/s41598-023-46020-3] [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: 08/07/2023] [Accepted: 10/26/2023] [Indexed: 11/09/2023] Open
Abstract
Alternaria, a cosmopolitan fungal genus is a dominant member of the grapevine (Vitis vinifera) microbiome. Several Alternaria species are known to produce a variety of secondary metabolites, which are particularly relevant to plant protection and food safety in field crops. According to previous findings, the majority of Alternaria species inhabiting grapevine belong to Alternaria sect. Alternaria. However, the phylogenetic diversity and secondary metabolite production of the distinct Alternaria species has remained unclear. In this study, our aim was to examine the genetic and metabolic diversity of endophytic Alternaria isolates associated with the above-ground tissues of the grapevine. Altogether, 270 Alternaria isolates were collected from asymptomatic leaves and grape clusters of different grapevine varieties in the Eger wine region of Hungary. After analyses of the nuclear ribosomal DNA internal transcribed spacer (ITS) and RNA polymerase second largest subunit (rpb2) sequences, 170 isolates were chosen for further analyses. Sequences of the Alternaria major allergen gene (Alt a 1), endopolygalacturonase (endoPG), OPA10-2, and KOG1058 were also included in the phylogenetic analyses. Identification of secondary metabolites and metabolite profiling of the isolates were performed using high-performance liquid chromatography (HPLC)-high-resolution tandem mass spectrometry (HR-MS/MS). The multilocus phylogeny results revealed two distinct groups in grapevine, namely A. alternata and the A. arborescens species complex (AASC). Eight main metabolites were identified in all collected Alternaria isolates, regardless of their affiliation to the species and lineages. Multivariate analyses of untargeted metabolites found no clear separations; however, a partial least squares-discriminant analysis model was able to successfully discriminate between the metabolic datasets from isolates belonging to the AASC and A. alternata. By conducting univariate analysis based on the discriminant ability of the metabolites, we also identified several features exhibiting large and significant variation between A. alternata and the AASC. The separation of these groups may suggest functional differences, which may also play a role in the functioning of the plant microbiome.
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Affiliation(s)
- Anna Molnár
- Centre for Research and Development, Eszterházy Károly Catholic University, Leányka utca 6, Eger, 3300, Hungary.
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary.
| | - Dániel G Knapp
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
- Department of Forestry and Wood Technology, Linnaeus University, Växjö, Sweden
| | - Miklós Lovas
- Centre for Research and Development, Eszterházy Károly Catholic University, Leányka utca 6, Eger, 3300, Hungary
- Hevesy György PhD School of Chemistry, Institute of Chemistry, ELTE Eötvös Loránd University, Budapest, H-1117, Hungary
| | - Gergő Tóth
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre U. 9, Budapest, 1092, Hungary
| | - Imre Boldizsár
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
- Department of Pharmacognosy, Semmelweis University, Üllői út 26, Budapest, 1085, Hungary
| | - Kálmán Zoltán Váczy
- Centre for Research and Development, Eszterházy Károly Catholic University, Leányka utca 6, Eger, 3300, Hungary
| | - Gábor M Kovács
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
- Plant Protection Institute, Centre for Agricultural Research, Budapest, 1525, Hungary
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4
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Job N, Sarasan M, Philip R. Mangrove-associated endomycota: diversity and functional significance as a source of novel drug leads. Arch Microbiol 2023; 205:349. [PMID: 37789248 DOI: 10.1007/s00203-023-03679-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 09/04/2023] [Accepted: 09/07/2023] [Indexed: 10/05/2023]
Abstract
Endophytic fungi are known for their unprecedented ability to produce novel lead compounds of clinical and pharmaceutical importance. This review focuses on the unexplored fungal diversity associated with mangroves, emphasizing their biodiversity, distribution, and methodological approaches targeting isolation, and identification. Also highlights the bioactive compounds reported from the mangrove fungal endophytes. The compounds are categorized according to their reported biological activities including antimicrobial, antioxidant and cytotoxic property. In addition, protein kinase, α-glucosidase, acetylcholinesterase, tyrosinase inhibition, antiangiogenic, DNA-binding affinity, and calcium/potassium channel blocking activity are also reported. Exploration of these endophytes as a source of pharmacologically important compounds will be highly promising in the wake of emerging antibiotic resistance among pathogens. Thus, the aim of this review is to present a detailed report of mangrove derived endophytic fungi and to open an avenue for researchers to discover the possibilities of exploring these hidden mycota in developing novel drug leads.
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Affiliation(s)
- Neema Job
- Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Fine Arts Avenue, Kochi, 682016, Kerala, India
- Department of Marine Biosciences, Faculty of Ocean Science and Technology, Kerala University of Fisheries and Ocean Studies, Kochi, 682506, Kerala, India
| | - Manomi Sarasan
- Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Fine Arts Avenue, Kochi, 682016, Kerala, India
| | - Rosamma Philip
- Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Fine Arts Avenue, Kochi, 682016, Kerala, India.
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5
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Podlech J, Gutsche M. Benzo[ j]fluoranthene-Derived Natural Products. JOURNAL OF NATURAL PRODUCTS 2023; 86:1632-1640. [PMID: 37276341 DOI: 10.1021/acs.jnatprod.3c00078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this overview the literature on benzo[j]fluoranthene-derived toxins produced by fungi is discussed with a view on isolation, structure, biological activities, biosynthesis, and total syntheses of the natural products. This class of compounds consists until now of 33 naturally occurring compounds, where 25 are chiral and eight contain no stereogenic centers. The relative configuration of xylarenol was clarified by comparison of experimental and calculated ECD spectra, and absolute configurations of four toxins were corrected. The compounds show various biological activities including antibiotic and cytotoxic properties.
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Affiliation(s)
- Joachim Podlech
- Institut für Organische Chemie, Karlsruher Institut für Technologie (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| | - Maximilian Gutsche
- Institut für Organische Chemie, Karlsruher Institut für Technologie (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
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Zhu M, He C, Zhou J, Li Y, Qian L, Zhang J, Qiao Y, Chang W, Lou H. Liverwort-Derived Metabolites Retard Endophyte Growth and Inspire Antifungal Application. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:4863-4875. [PMID: 36919252 DOI: 10.1021/acs.jafc.2c08866] [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: 06/18/2023]
Abstract
Liverwort secondary metabolites play an important role in the peaceful relationship between liverwort endophytic fungi and the host. This study identified potential antifungal agents based on interactions between host plants and endophytic fungi. Two endophytic fungi strains and 25 metabolites, including nine new compounds, were isolated from the Chinese liverwort Herbertus herpocladioides. Endophytic fungi were identified using internal transcribed spacer and whole-genome sequencing, and the compound structures were determined using comprehensive spectroscopic analysis coupled with electronic circular dichroism calculations. Among these compounds, compounds 10-13 exhibited potent antifungal activities. Compound 10, the most potent antifungal agent, disrupted fungal mitochondrial respiration by inhibiting the activity of mitochondrial complexes I and IV and resulted in the intracellular ATP content of endophytic fungi being significantly reduced. The in vivo results show that compound 10 protected fruits and animals from infection by phytopathogen Alternaria citriarbusti and human pathogen Candida albicans, respectively.
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Affiliation(s)
- Mingzhu Zhu
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Chen He
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Jinchuan Zhou
- School of Pharmacy, Linyi University, Linyi 276000, China
| | - Yi Li
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Lilin Qian
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Jiaozhen Zhang
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Yanan Qiao
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Wenqiang Chang
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Hongxiang Lou
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
- Shandong Provincial Clinical Research Center for Emergency and Critical Care Medicine, Qilu Hospital, Jinan, Shandong 250012, China
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Firoozbahr M, Kingshott P, Palombo EA, Zaferanloo B. Recent Advances in Using Natural Antibacterial Additives in Bioactive Wound Dressings. Pharmaceutics 2023; 15:644. [PMID: 36839966 PMCID: PMC10004169 DOI: 10.3390/pharmaceutics15020644] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/07/2023] [Accepted: 02/09/2023] [Indexed: 02/17/2023] Open
Abstract
Wound care is a global health issue with a financial burden of up to US $96.8 billion annually in the USA alone. Chronic non-healing wounds which show delayed and incomplete healing are especially problematic. Although there are more than 3000 dressing types in the wound management market, new developments in more efficient wound dressings will require innovative approaches such as embedding antibacterial additives into wound-dressing materials. The lack of novel antibacterial agents and the misuse of current antibiotics have caused an increase in antimicrobial resistance (AMR) which is estimated to cause 10 million deaths by 2050 worldwide. These ongoing challenges clearly indicate an urgent need for developing new antibacterial additives in wound dressings targeting microbial pathogens. Natural products and their derivatives have long been a significant source of pharmaceuticals against AMR. Scrutinising the data of newly approved drugs has identified plants as one of the biggest and most important sources in the development of novel antibacterial drugs. Some of the plant-based antibacterial additives, such as essential oils and plant extracts, have been previously used in wound dressings; however, there is another source of plant-derived antibacterial additives, i.e., those produced by symbiotic endophytic fungi, that show great potential in wound dressing applications. Endophytes represent a novel, natural, and sustainable source of bioactive compounds for therapeutic applications, including as efficient antibacterial additives for chronic wound dressings. This review examines and appraises recent developments in bioactive wound dressings that incorporate natural products as antibacterial agents as well as advances in endophyte research that show great potential in treating chronic wounds.
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Affiliation(s)
- Meysam Firoozbahr
- Department of Chemistry and Biotechnology, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
| | - Peter Kingshott
- Department of Chemistry and Biotechnology, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
- ARC Training Centre Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Engineering, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
| | - Enzo A. Palombo
- Department of Chemistry and Biotechnology, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
| | - Bita Zaferanloo
- Department of Chemistry and Biotechnology, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
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Antioxidant, Cytotoxic, and DNA Damage Protection Activities of Endophytic Fungus Pestalotiopsis neglecta Isolated from Ziziphus spina-christi Medicinal Plant. Microorganisms 2023; 11:microorganisms11010117. [PMID: 36677409 PMCID: PMC9862592 DOI: 10.3390/microorganisms11010117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 12/14/2022] [Accepted: 12/22/2022] [Indexed: 01/04/2023] Open
Abstract
Fungal endophytes are friendly microorganisms that colonize plants and are important in the interactions between plants and their environment. They generate valuable secondary metabolites that are valuable to both plants and humans. Endophytic fungi with bioactivities were isolated from the leaves of the medicinal plant Ziziphus spina-christi. An efficient isolate was selected and identified as Pestalotiopsis neglecta based on nucleotide sequencing of the internal transcribed spacer region (ITS 1-5.8S-ITS 2) of the 18S rRNA gene (NCBI accession number OP529850); the 564 bp had 99 to 100% similarity with P. neglecta MH860161.1, AY682935.1, KP689121.1, and MG572407.1, according to the BLASTn analysis, following preliminary phytochemical and antifungal screening. The biological activities of this fungus' crude ethyl acetate (EtOAc) extract were assessed. With an efficient radical scavenging activity against 2,2'-diphenyl-1-picrylhydrazyl and an IC50 value of 36.6 µg mL-1, P. neglecta extract has shown its potential as an antioxidant. Moreover, it displayed notable cytotoxic effects against MCF-7 (breast carcinoma, IC50 = 22.4 µg mL-1), HeLa (cervical carcinoma, IC50 = 28.9 µg mL-1) and HepG-2 (liver carcinoma, IC50 = 28.9 µg mL-1). At 10 µg mL-1, EtOAc demonstrated significant DNA protection against hydroxyl radical-induced damage. Based on FT-IR and GC-MS spectral analysis, it was detected that the EtOAc of P. neglecta product contains multiple bioactive functional groups. Subsequently, this validated the features of major different potent compounds; tolycaine, 1H-pyrazol, 1,3,5-trimethyl-, eugenol, 2,5-cyclohexadiene-1,4-dione, 2,6-bis(1,1-dimethyl), and bis(2-ethylhexyl) phthalate. Since these compounds are biologically relevant in various aspects, and distinct biological activities of fungal extract were acceptable in vitro, this suggests that endophytic fungus P. neglecta may be a viable source of bioactive natural products. This could be a good starting point for pharmaceutical applications.
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Wongso H, Hendra R, Nugraha AS, Ritawidya R, Saptiama I, Kusumaningrum CE. Microbial metabolites diversity and their potential as molecular template for the discovery of new fluorescent and radiopharmaceutical probes. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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10
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Chang CH, Lee YC, Hsiao G, Chang LK, Chi WC, Cheng YC, Huang SJ, Wang TC, Lu YS, Lee TH. Anti-Epstein-Barr Viral Agents from the Medicinal Herb-Derived Fungus Alternaria alstroemeriae Km2286. JOURNAL OF NATURAL PRODUCTS 2022; 85:2667-2674. [PMID: 36346918 DOI: 10.1021/acs.jnatprod.2c00783] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Chromatographic separation on the liquid-state fermented products produced by the fungal strain Alternaria alstroemeriae Km2286 isolated from the littoral medicinal herb Atriplex maximowicziana Makino resulted in the isolation of compounds 1-9. Structures were determined by spectroscopic analysis as four undescribed perylenequinones, altertromins A-D (1-4), along with altertoxin IV (5), altertoxin VIII (6), stemphyperylenol (7), tenuazonic acid (8), and allo-tenuazonic acid (9). Compounds 1-6 exhibited antiviral activities against Epstein-Barr virus (EBV) with EC50 values ranging from 0.17 ± 0.07 to 3.13 ± 0.31 μM and selectivity indices higher than 10. In an anti-neuroinflammatory assay, compounds 1-4, 6, and 7 showed inhibitory activity of nitric oxide production in lipopolysaccharide-induced microglial BV-2 cells, with IC50 values ranging from 0.33 ± 0.04 to 4.08 ± 0.53 μM without significant cytotoxicity. This is the first report to describe perylenequinone-type compounds with potent anti-EBV and anti-neuroinflammatory activities.
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Affiliation(s)
- Chia-Hao Chang
- Institute of Fisheries Science, National Taiwan University, Taipei 10617, Taiwan
| | - Yi-Chieh Lee
- Institute of Fisheries Science, National Taiwan University, Taipei 10617, Taiwan
| | - George Hsiao
- Department of Pharmacology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
| | - Li-Kwan Chang
- Department of Biochemical Science and Technology, College of Life Science, National Taiwan University, Taipei 10617, Taiwan
| | - Wei-Chiung Chi
- Department of Food Science, National Quemoy University, Kinmen 89250, Taiwan
| | - Yuan-Chung Cheng
- Department of Chemistry and Center for Quantum Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Shu-Jung Huang
- Institute of Fisheries Science, National Taiwan University, Taipei 10617, Taiwan
| | - Tai-Chou Wang
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Yi-Shan Lu
- Department of Biochemical Science and Technology, College of Life Science, National Taiwan University, Taipei 10617, Taiwan
| | - Tzong-Huei Lee
- Institute of Fisheries Science, National Taiwan University, Taipei 10617, Taiwan
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Elmaidomy AH, Shady NH, Abdeljawad KM, Elzamkan MB, Helmy HH, Tarshan EA, Adly AN, Hussien YH, Sayed NG, Zayed A, Abdelmohsen UR. Antimicrobial potentials of natural products against multidrug resistance pathogens: a comprehensive review. RSC Adv 2022; 12:29078-29102. [PMID: 36320761 PMCID: PMC9558262 DOI: 10.1039/d2ra04884a] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 10/03/2022] [Indexed: 11/07/2022] Open
Abstract
Antibiotic resistance is one of the critical issues, describing a significant social health complication globally. Hence, the discovery of novel antibiotics has acquired an increased attention particularly against drug-resistant pathogens. Natural products have served as potent therapeutics against pathogenic bacteria since the glorious age of antibiotics of the mid 20th century. This review outlines the various mechanistic candidates for dealing with multi-drug resistant pathogens and explores the terrestrial phytochemicals isolated from plants, lichens, insects, animals, fungi, bacteria, mushrooms, and minerals with reported antimicrobial activity, either alone or in combination with conventional antibiotics. Moreover, newly established tools are presented, including prebiotics, probiotics, synbiotics, bacteriophages, nanoparticles, and bacteriocins, supporting the progress of effective antibiotics to address the emergence of antibiotic-resistant infectious bacteria. Therefore, the current article may uncover promising drug candidates that can be used in drug discovery in the future.
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Affiliation(s)
- Abeer H Elmaidomy
- Department of Pharmacognosy, Faculty of Pharmacy, Beni-Suef University Beni-Suef 62511 Egypt
| | - Nourhan Hisham Shady
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, Universities Zone New Minia 61111 Egypt
| | | | | | - Hussein Hykel Helmy
- Faculty of Pharmacy, Deraya University, Universities Zone New Minia 61111 Egypt
| | - Emad Ashour Tarshan
- Faculty of Pharmacy, Deraya University, Universities Zone New Minia 61111 Egypt
| | - Abanoub Nabil Adly
- Faculty of Pharmacy, Deraya University, Universities Zone New Minia 61111 Egypt
| | | | - Nesma Gamal Sayed
- Faculty of Pharmacy, Deraya University, Universities Zone New Minia 61111 Egypt
| | - Ahmed Zayed
- Department of Pharmacognosy, College of Pharmacy, Tanta University, Elguish Street (Medical Campus) Tanta 31527 Egypt
- Institute of Bioprocess Engineering, Technical University of Kaiserslautern Gottlieb-Daimler-Str. 49 Kaiserslautern 67663 Germany
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, Universities Zone New Minia 61111 Egypt
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University Minia 61519 Egypt
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12
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Tsivileva OM, Koftin OV, Evseeva NV. Coumarins as Fungal Metabolites with Potential Medicinal Properties. Antibiotics (Basel) 2022; 11:1156. [PMID: 36139936 PMCID: PMC9495007 DOI: 10.3390/antibiotics11091156] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 08/23/2022] [Accepted: 08/24/2022] [Indexed: 11/17/2022] Open
Abstract
Coumarins are a structurally varied set of 2H-chromen-2-one compounds categorized also as members of the benzopyrone group of secondary metabolites. Coumarin derivatives attract interest owing to their wide practical application and the unique reactivity of fused benzene and pyrone ring systems in molecular structure. Coumarins have their own specific fingerprints as antiviral, antimicrobial, antioxidant, anti-inflammatory, antiadipogenic, cytotoxic, apoptosis, antitumor, antitubercular, and cytotoxicity agents. Natural products have played an essential role in filling the pharmaceutical pipeline for thousands of years. Biological effects of natural coumarins have laid the basis of low-toxic and highly effective drugs. Presently, more than 1300 coumarins have been identified in plants, bacteria, and fungi. Fungi as cultivated microbes have provided many of the nature-inspired syntheses of chemically diverse drugs. Endophytic fungi bioactivities attract interest, with applications in fields as diverse as cancer and neuronal injury or degeneration, microbial and parasitic infections, and others. Fungal mycelia produce several classes of bioactive molecules, including a wide group of coumarins. Of promise are further studies of conditions and products of the natural and synthetic coumarins' biotransformation by the fungal cultures, aimed at solving the urgent problem of searching for materials for biomedical engineering. The present review evaluates the fungal coumarins, their structure-related peculiarities, and their future therapeutic potential. Special emphasis has been placed on the coumarins successfully bioprospected from fungi, whereas an industry demand for the same coumarins earlier found in plants has faced hurdles. Considerable attention has also been paid to some aspects of the molecular mechanisms underlying the coumarins' biological activity. The compounds are selected and grouped according to their cytotoxic, anticancer, antibacterial, antifungal, and miscellaneous effects.
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Affiliation(s)
- Olga M. Tsivileva
- Laboratory of Microbiology, Institute of Biochemistry and Physiology of Plants and Microorganisms, Saratov Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), 13 Prospekt Entuziastov, Saratov 410049, Russia
| | - Oleg V. Koftin
- Department of Biochemistry, V.I. Razumovsky Saratov State Medical University, 112 ul. Bol’shaya Kazach’ya, Saratov 410012, Russia
| | - Nina V. Evseeva
- Laboratory of Immunochemistry, Institute of Biochemistry and Physiology of Plants and Microorganisms, Saratov Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), 13 Prospekt Entuziastov, Saratov 410049, Russia
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13
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Hou Z, Sun C, Chen X, Zhang G, Che Q, Li D, Zhu T. Xanalterate A, Altertoxin VIII and IX, Perylenequinone Derivatives from Antarctica-Sponge-Derived Fungus Alternaria sp. HDN19-690. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Endophytic Fungi: Key Insights, Emerging Prospects, and Challenges in Natural Product Drug Discovery. Microorganisms 2022; 10:microorganisms10020360. [PMID: 35208814 PMCID: PMC8876476 DOI: 10.3390/microorganisms10020360] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 01/25/2022] [Accepted: 02/01/2022] [Indexed: 12/01/2022] Open
Abstract
Plant-associated endophytes define an important symbiotic association in nature and are established bio-reservoirs of plant-derived natural products. Endophytes colonize the internal tissues of a plant without causing any disease symptoms or apparent changes. Recently, there has been a growing interest in endophytes because of their beneficial effects on the production of novel metabolites of pharmacological significance. Studies have highlighted the socio-economic implications of endophytic fungi in agriculture, medicine, and the environment, with considerable success. Endophytic fungi-mediated biosynthesis of well-known metabolites includes taxol from Taxomyces andreanae, azadirachtin A and B from Eupenicillium parvum, vincristine from Fusarium oxysporum, and quinine from Phomopsis sp. The discovery of the billion-dollar anticancer drug taxol was a landmark in endophyte biology/research and established new paradigms for the metabolic potential of plant-associated endophytes. In addition, endophytic fungi have emerged as potential prolific producers of antimicrobials, antiseptics, and antibiotics of plant origin. Although extensively studied as a “production platform” of novel pharmacological metabolites, the molecular mechanisms of plant–endophyte dynamics remain less understood/explored for their efficient utilization in drug discovery. The emerging trends in endophytic fungi-mediated biosynthesis of novel bioactive metabolites, success stories of key pharmacological metabolites, strategies to overcome the existing challenges in endophyte biology, and future direction in endophytic fungi-based drug discovery forms the underlying theme of this article.
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Chen S, Cai R, Liu Z, Cui H, She Z. Secondary metabolites from mangrove-associated fungi: source, chemistry and bioactivities. Nat Prod Rep 2021; 39:560-595. [PMID: 34623363 DOI: 10.1039/d1np00041a] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Covering 1989 to 2020The mangrove forests are a complex ecosystem occurring at tropical and subtropical intertidal estuarine zones and nourish a diverse group of microorganisms including fungi, actinomycetes, bacteria, cyanobacteria, algae, and protozoa. Among the mangrove microbial community, mangrove associated fungi, as the second-largest ecological group of the marine fungi, not only play an essential role in creating and maintaining this biosphere but also represent a rich source of structurally unique and diverse bioactive secondary metabolites, attracting significant attention of organic chemists and pharmacologists. This review summarizes the discovery relating to the source and characteristics of metabolic products isolated from mangrove-associated fungi over the past thirty years (1989-2020). Its emphasis included 1387 new metabolites from 451 papers, focusing on bioactivity and the unique chemical diversity of these natural products.
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Affiliation(s)
- Senhua Chen
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China. .,School of Marine Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Runlin Cai
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China. .,College of Science, Shantou University, Shantou 515063, China
| | - Zhaoming Liu
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China. .,State Key Laboratory of Applied Microbiology Southern China, Guangdong Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China
| | - Hui Cui
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China. .,School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Zhigang She
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China.
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16
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Diverse anti-inflammation and anti-cancer polyketides isolated from the endophytic fungi Alternaria sp. MG1. Fitoterapia 2021; 153:105000. [PMID: 34303765 DOI: 10.1016/j.fitote.2021.105000] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 07/16/2021] [Accepted: 07/17/2021] [Indexed: 11/22/2022]
Abstract
Six new polyketides, alternaritins A-D [(±)-1-4] and isoxanalteric acid I (8), and 25 known Alternaria toxins were isolated from the culture of an endophytic fungi Alternaria sp. MG1. 3 is a rare fungal metabolite. 6 is a new natural product, and 5, 7, and 9 are known previously but their absolute configurations have not been determined. Three enantiomers [(±)-1, (±)-7, and (±)-15] were separated via chiral HPLC resolution. The structures of those polyketides (1-9) were elucidated by spectrometric analysis using MS and NMR. The absolute configurations were established using X-ray diffraction analysis and statistical comparative analysis of the experimental ECD and OR data, in conjunction with quantum mechanical calculations. All of the compounds were evaluated for their bioactivities. Known compound 27 exerted the most potent cytotoxic activities against HT-1080 and NCI-H1299 cell lines. The new compounds, 2 and 3, showed moderate inhibition on COX-2, while a pair of isomers, 8 and 9, exhibited medium activity on COX-2 and uropathogenic Escherichia coli.
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Crudo F, Aichinger G, Mihajlovic J, Varga E, Dellafiora L, Warth B, Dall'Asta C, Berry D, Marko D. In vitro interactions of Alternaria mycotoxins, an emerging class of food contaminants, with the gut microbiota: a bidirectional relationship. Arch Toxicol 2021; 95:2533-2549. [PMID: 33847775 PMCID: PMC8241668 DOI: 10.1007/s00204-021-03043-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 04/01/2021] [Indexed: 12/11/2022]
Abstract
The human gut microbiota plays an important role in the maintenance of human health. Factors able to modify its composition might predispose the host to the development of pathologies. Among the various xenobiotics introduced through the diet, Alternaria mycotoxins are speculated to represent a threat for human health. However, limited data are currently available about the bidirectional relation between gut microbiota and Alternaria mycotoxins. In the present work, we investigated the in vitro effects of different concentrations of a complex extract of Alternaria mycotoxins (CE; containing eleven mycotoxins; e.g. 0.153 µM alternariol and 2.3 µM altersetin, at the maximum CE concentration tested) on human gut bacterial strains, as well as the ability of the latter to metabolize or adsorb these compounds. Results from the minimum inhibitory concentration assay showed the scarce ability of CE to inhibit the growth of the tested strains. However, the growth kinetics of most of the strains were negatively affected by exposure to the various CE concentrations, mainly at the highest dose (50 µg/mL). The CE was also found to antagonize the formation of biofilms, already at concentrations of 0.5 µg/mL. LC-MS/MS data analysis of the mycotoxin concentrations found in bacterial pellets and supernatants after 24 h incubation showed the ability of bacterial strains to adsorb some Alternaria mycotoxins, especially the key toxins alternariol, alternariol monomethyl ether, and altersetin. The tendency of these mycotoxins to accumulate within bacterial pellets, especially in those of Gram-negative strains, was found to be directly related to their lipophilicity.
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Affiliation(s)
- Francesco Crudo
- Department of Food Chemistry and Toxicology, University of Vienna, Währinger Str. 38, 1090, Wien, Austria
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124, Parma, Italy
| | - Georg Aichinger
- Department of Food Chemistry and Toxicology, University of Vienna, Währinger Str. 38, 1090, Wien, Austria
| | - Jovana Mihajlovic
- Department of Microbiology and Ecosystem Science, Centre for Microbiology and Environmental Systems Science, University of Vienna, Althanstr. 14, 1090, Vienna, Austria
| | - Elisabeth Varga
- Department of Food Chemistry and Toxicology, University of Vienna, Währinger Str. 38, 1090, Wien, Austria
| | - Luca Dellafiora
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124, Parma, Italy
| | - Benedikt Warth
- Department of Food Chemistry and Toxicology, University of Vienna, Währinger Str. 38, 1090, Wien, Austria
| | - Chiara Dall'Asta
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124, Parma, Italy
| | - David Berry
- Department of Food Chemistry and Toxicology, University of Vienna, Währinger Str. 38, 1090, Wien, Austria
- Department of Microbiology and Ecosystem Science, Centre for Microbiology and Environmental Systems Science, University of Vienna, Althanstr. 14, 1090, Vienna, Austria
- Joint Microbiome Facility of the Medical University of Vienna and the University of Vienna, Vienna, Austria
| | - Doris Marko
- Department of Food Chemistry and Toxicology, University of Vienna, Währinger Str. 38, 1090, Wien, Austria.
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124, Parma, Italy.
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Antioxidant and antimicrobial activity displayed by a fungal endophyte Alternaria alternata isolated from Picrorhiza kurroa from Garhwal Himalayas, India. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2021. [DOI: 10.1016/j.bcab.2021.101955] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Qader MM, Hamed AA, Soldatou S, Abdelraof M, Elawady ME, Hassane ASI, Belbahri L, Ebel R, Rateb ME. Antimicrobial and Antibiofilm Activities of the Fungal Metabolites Isolated from the Marine Endophytes Epicoccum nigrum M13 and Alternaria alternata 13A. Mar Drugs 2021; 19:md19040232. [PMID: 33924262 PMCID: PMC8074750 DOI: 10.3390/md19040232] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/15/2021] [Accepted: 04/19/2021] [Indexed: 01/15/2023] Open
Abstract
Epicotripeptin (1), a new cyclic tripeptide along with four known cyclic dipeptides (2-5) and one acetamide derivative (6) were isolated from seagrass-associated endophytic fungus Epicoccum nigrum M13 recovered from the Red Sea. Additionally, two new compounds, cyclodidepsipeptide phragamide A (7) and trioxobutanamide derivative phragamide B (8), together with eight known compounds (9-16), were isolated from plant-derived endophyte Alternaria alternata 13A collected from a saline lake of Wadi El Natrun depression in the Sahara Desert. The structures of the isolated compounds were determined based on the 1D and 2D NMR spectroscopic data, HRESIMS data, and a comparison with the reported literature. The absolute configurations of 1 and 7 were established by advanced Marfey's and Mosher's ester analyses. The antimicrobial screening indicated that seven of the tested compounds exhibited considerable (MIC range of 2.5-5 µg/mL) to moderate (10-20 µg/mL) antibacterial effect against the tested Gram-positive strains and moderate to weak (10-30 µg/mL) antibacterial effect against Gram-negative strains. Most of the compounds exhibited weak or no activity against the tested Gram-negative strains. On the other hand, four of the tested compounds showed considerable antibiofilm effects against biofilm forming Gram-positive and Gram-negative strains.
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Affiliation(s)
- M. Mallique Qader
- School of Computing, Engineering, & Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, UK; (M.M.Q.); (A.S.I.H.)
- National Institute of Fundamental Studies, Hantana Road, Kandy 20000, Sri Lanka
| | - Ahmed A. Hamed
- National Research Centre, Microbial Chemistry Department, 33 El-Buhouth Street, Dokki, Giza 12622, Egypt; (A.A.H.); (M.A.)
| | - Sylvia Soldatou
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK;
| | - Mohamed Abdelraof
- National Research Centre, Microbial Chemistry Department, 33 El-Buhouth Street, Dokki, Giza 12622, Egypt; (A.A.H.); (M.A.)
| | - Mohamed E. Elawady
- National Research Centre, Microbial Biotechnology Department, 33 El-Buhouth Street, Dokki, Giza 12622, Egypt;
| | - Ahmed S. I. Hassane
- School of Computing, Engineering, & Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, UK; (M.M.Q.); (A.S.I.H.)
- Aberdeen Royal Infirmary, Foresterhill Health Campus, Aberdeen AB25 2ZN, UK
| | - Lassaad Belbahri
- Laboratory of Soil Biology, University of Neuchatel, 2000 Neuchatel, Switzerland;
| | - Rainer Ebel
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK;
- Correspondence: (R.E.); (M.E.R.); Tel.: +44-1224-272930 (R.E.); +44-141-8483072 (M.E.R.)
| | - Mostafa E. Rateb
- School of Computing, Engineering, & Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, UK; (M.M.Q.); (A.S.I.H.)
- Correspondence: (R.E.); (M.E.R.); Tel.: +44-1224-272930 (R.E.); +44-141-8483072 (M.E.R.)
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20
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Lotfy MM, Sayed AM, AboulMagd AM, Hassan HM, El Amir D, Abouzid SF, El-Gendy AO, Rateb ME, Abdelmohsen UR, Alhadrami H, Mohammed R. Metabolomic profiling, biological evaluation of Aspergillus awamori, the river Nile-derived fungus using epigenetic and OSMAC approaches. RSC Adv 2021; 11:6709-6719. [PMID: 35423214 PMCID: PMC8694877 DOI: 10.1039/d0ra07578g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 01/10/2021] [Indexed: 11/21/2022] Open
Abstract
LC-HRMS-based metabolomics approach was applied to the river Nile-derived fungus Aspergillus awamori after its fermentation on four different media and using four epigenetic modifiers as elicitors. Thereafter, a comprehensive multivariate statistical analysis such as PCA, PLS-DA and OPLS-DA were employed to explain the generated metabolomic data (1587 features). PCA showed that the fungus displayed a unique chemical profile in each medium or elicitor. Additionally, PLS-DA results revealed the upregulated metabolites under each of these conditions. Results indicated that both rice and malt dextrose agar were recognized as the best media in terms of secondary metabolites diversity and showed better profiles than the four applied epigenetic modifiers, of which nicotinamide was the best secondary metabolite elicitor. Testing the antibacterial and cytotoxic effects of all A. awamori-derived extracts revealed that using epigenetic modifiers can induce antimicrobial metabolites against S. aureus and E. coli, whereas using rice, malt dextrose or nicotinamide can induce groups of cytotoxic metabolites. OPLS-DA results assisted in the putative identification of the induced metabolites that could be responsible for these observed inhibitory activities. This study highlighted how powerful the OSMAC approach in maximizing of the chemical diversity of a single organism. Furthermore, it revealed the power of metabolomics in tracing, profiling and categorizing such chemical diversity and even targeting the possible bioactive candidates which require further scaling up studies in the future. LC-HRMS-based metabolomics approach was applied to the river Nile-derived fungus Aspergillus awamori after its fermentation on four different media and using four epigenetic modifiers as elicitors.![]()
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Affiliation(s)
- Momen M Lotfy
- Pharmacognosy Department, Faculty of Pharmacy, Beni-Suef University Beni-Suef 62111 Egypt +20 1202442204
| | - Ahmed M Sayed
- Department of Pharmacognosy, Faculty of Pharmacy, Nahda University Beni-Suef 62513 Egypt
| | - Asmaa M AboulMagd
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Nahda University Beni-Suef 62513 Egypt
| | - Hossam M Hassan
- Pharmacognosy Department, Faculty of Pharmacy, Beni-Suef University Beni-Suef 62111 Egypt +20 1202442204.,Department of Pharmacognosy, Faculty of Pharmacy, Nahda University Beni-Suef 62513 Egypt
| | - Dalia El Amir
- Pharmacognosy Department, Faculty of Pharmacy, Beni-Suef University Beni-Suef 62111 Egypt +20 1202442204
| | - Sameh F Abouzid
- Pharmacognosy Department, Faculty of Pharmacy, Beni-Suef University Beni-Suef 62111 Egypt +20 1202442204
| | - Ahmed O El-Gendy
- Microbiology and Immunology Department, Faculty of Pharmacy, Beni-Suef University Beni-Suef 62111 Egypt
| | - Mostafa E Rateb
- School of Computing, Engineering & Physical Science, University of the West of Scotland Paisley PA1 2BE Scotland UK
| | - Usama R Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University Minia 61519 Egypt.,Department of Pharmacognosy, Faculty of Pharmacy, Deraya University 7 Universities Zone 61111 New Minia City Egypt.,Department of Pharmacognosy, College of Pharmacy, King Khalid University Abha 61441 Saudi Arabia
| | - Hani Alhadrami
- Department of Medical Laboratory Technology, King Abdulaziz University P.O. Box 80402 Jeddah 21589 Saudi Arabia.,Special Infectious Agent Unit, King Fahd Medical Research Centre P.O. Box 80402 Jeddah 21589 Saudi Arabia
| | - Rabab Mohammed
- Pharmacognosy Department, Faculty of Pharmacy, Beni-Suef University Beni-Suef 62111 Egypt +20 1202442204
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21
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Abo Nouh FA, Gezaf SA, Abdel-Azeem AM. Recent Advances in Fungal Antimicrobial Molecules. Fungal Biol 2021. [DOI: 10.1007/978-3-030-85603-8_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Yadav AN, Kaur T, Devi R, Kour D, Yadav A, Dikilitas M, Usmani Z, Yadav N, Abdel-Azeem AM, Ahluwalia AS. Biodiversity and Biotechnological Applications of Industrially Important Fungi: Current Research and Future Prospects. Fungal Biol 2021. [DOI: 10.1007/978-3-030-67561-5_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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23
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Zhao S, Tian K, Li Y, Ji W, Liu F, Khan B, Yan W, Ye Y. Enantiomeric Dibenzo-α-Pyrone Derivatives from Alternaria alternata ZHJG5 and Their Potential as Agrochemicals. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:15115-15122. [PMID: 33289556 DOI: 10.1021/acs.jafc.0c04106] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Three pairs of enantiomeric dibenzo-α-pyrone derivatives (1-3) including two pairs of new racemates (±)-alternaone A (1) and (±)-alternaone B (2) and one new enantiomer (-)-alternatiol (3), together with five known compounds (4-8) were isolated from the fungus Alternaria alternata ZHJG5. Their structures were confirmed by spectroscopic data and single-crystal X-ray diffraction analysis. All enantiomers were separated via chiral high-performance liquid chromatography, with their configurations determined by electronic circular dichroism calculation. Biogenetically, a key epoxy-rearrangement step was proposed for the formation of skeletons in 1-3; (+) 1, (-)-1, and 5 presented moderate antibacterial inhibition on phytopathogenic bacteria Xanthomonas oryzae pv. oryzae and Xanthomonas oryzae pv. oryzicola. In the antifungal test, compounds 7 and 8 showed a moderate protective effect against Botrytis cinerea in vivo.
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Affiliation(s)
- Shuangshuang Zhao
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing 210095, P. R. China
| | - Kailin Tian
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing 210095, P. R. China
| | - Yu Li
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing 210095, P. R. China
| | - Wenxia Ji
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing 210095, P. R. China
| | - Fang Liu
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing 210095, P. R. China
| | - Babar Khan
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing 210095, P. R. China
| | - Wei Yan
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing 210095, P. R. China
- Department of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Yonghao Ye
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing 210095, P. R. China
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24
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Manganyi MC, Ateba CN. Untapped Potentials of Endophytic Fungi: A Review of Novel Bioactive Compounds with Biological Applications. Microorganisms 2020; 8:microorganisms8121934. [PMID: 33291214 PMCID: PMC7762190 DOI: 10.3390/microorganisms8121934] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 11/20/2020] [Accepted: 11/26/2020] [Indexed: 01/08/2023] Open
Abstract
Over the last century, endophytic fungi have gained tremendous attention due to their ability to produce novel bioactive compounds exhibiting varied biological properties and are, therefore, utilized for medicinal, pharmaceutical, and agricultural applications. Endophytic fungi reside within the plant tissues without showing any disease symptoms, thus supporting the physiological and ecological attributes of the host plant. Ground breaking lead compounds, such as paclitaxel and penicillin, produced by endophytic fungi have paved the way for exploring novel bioactive compounds for commercial usage. Despite this, limited research has been conducted in this valuable and unique niche area. These bioactive compounds belong to various structural groups, including alkaloids, peptides, steroids, terpenoids, phenols, quinones, phenols, and flavonoids. The current review focuses on the significance of endophytic fungi in producing novel bioactive compounds possessing a variety of biological properties that include antibacterial, antiviral, antifungal, antiprotozoal, antiparasitic, antioxidant, immunosuppressant, and anticancer functions. Taking into consideration the portal of this publication, special emphasis is placed on the antimicrobial and antiviral activities of metabolites produced by endophytes against human pathogens. It also highlights the importance of utilization of these compounds as potential treatment agents for serious life-threatening infectious diseases. This is supported by the fact that several findings have indicated that these bioactive compounds may significantly contribute towards the fight against resistant human and plant pathogens, thus motivating the need enhance the search for new, more efficacious and cost-effective antimicrobial drugs.
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Affiliation(s)
- Madira Coutlyne Manganyi
- Department of Microbiology, North West University Mafikeng Campus, Private Bag X2046, Mmabatho 2735, South Africa
- Correspondence: ; Tel.: +27-18-389-2134
| | - Collins Njie Ateba
- Food Security and Safety Niche Area, Faculty of Agriculture, Science and Technology, North West University, Mmabatho, Mafikeng 2735, South Africa;
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25
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Wang L, Jiao J, Liu D, Zhang X, Li J, Che Q, Zhu T, Zhang G, Li D. Cytotoxic Meroterpenoids from the Fungus Alternaria sp. JJY-32. Chem Biodivers 2020; 17:e2000226. [PMID: 32372483 DOI: 10.1002/cbdv.202000226] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 05/05/2020] [Indexed: 01/08/2023]
Abstract
Two new meroterpenoids, tricycloalternarenes X and Y, together with one known meroterpenoid, tricycloalternarene I, were isolated from the fungus Alternaria sp. JJY-32. The structures including absolute configurations were established by the comprehensive spectroscopic data, electronic circular dichroism (ECD) spectral analyses, and biosynthesis consideration. Tricycloalternarene X showed cytotoxicity against the HL-60 and HO8910 cells with IC50 values of 7.54 and 20.32 μm.
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Affiliation(s)
- Lu Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, P. R. China
| | - Jieying Jiao
- Sino Silliker Testing Services Co., Ltd, Qingdao, 266011, P. R. China
| | - Dan Liu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, P. R. China
| | - Xiaomin Zhang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, P. R. China
| | - Jing Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, P. R. China
| | - Qian Che
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, P. R. China
| | - Tianjiao Zhu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, P. R. China
| | - Guojian Zhang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, P. R. China.,Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266237, P. R. China
| | - Dehai Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, P. R. China.,Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266237, P. R. China
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26
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Saad MMG, Abdelgaleil SAM, Shiono Y. Antibacterial and herbicidal properties of secondary metabolites from fungi. Nat Prod Res 2020; 35:5446-5451. [PMID: 32567386 DOI: 10.1080/14786419.2020.1779718] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Twenty-eight compounds were isolated from endophytic, soil and marine fungi and their structures were elucidated through spectroscopic methods. The isolated compounds were tested for their antibacterial and herbicidal activities against phytopathogenic bacteria and barnyard grass weed for the first time. Methyleurotinone (14) was the most potent compound against Pectobacterium carotovorum subsp. carotovorum, Pseudomonas syringae pv. syringae, Rhizobium radiobacter and Ralstonia solanacearum with minimum inhibitory concentration (MIC) values of 31.3, 125, 31.3 and 125 mg/L, respectively. Compounds 13-15 were highly effective in reducing the development of potato tuber soft rot disease caused by P. carotovorum subsp. carotovorum. Furthermore, twelve of the tested compounds induced a significant reduction in seed germination of Echinochloa crus-galli at 2 mM with compounds 8 and 26 causing complete inhibition of seed germination. Also, compounds 4, 22, 5, 8, 18 and 25-27 induced remarkable reduction of root and shoot growth of E. crus-galli at 2 mM.
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Affiliation(s)
- Mona M G Saad
- Department of Pesticide Chemistry and Technology, Faculty of Agriculture, El-Shatby, Alexandria University, Alexandria, Egypt
| | - Samir A M Abdelgaleil
- Department of Pesticide Chemistry and Technology, Faculty of Agriculture, El-Shatby, Alexandria University, Alexandria, Egypt
| | - Yoshihito Shiono
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata, Japan
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Fadiji AE, Babalola OO. Elucidating Mechanisms of Endophytes Used in Plant Protection and Other Bioactivities With Multifunctional Prospects. Front Bioeng Biotechnol 2020; 8:467. [PMID: 32500068 PMCID: PMC7242734 DOI: 10.3389/fbioe.2020.00467] [Citation(s) in RCA: 153] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 04/22/2020] [Indexed: 01/06/2023] Open
Abstract
Endophytes are abundant in plants and studies are continuously emanating on their ability to protect plants from pathogens that cause diseases especially in the field of agriculture. The advantage that endophytes have over other biocontrol agents is the ability to colonize plant's internal tissues. Despite this attributes, a deep understanding of the mechanism employed by endophytes in protecting the plant from diseases is still required for both effectiveness and commercialization. Also, there are increasing cases of antibiotics resistance among most causative agents of diseases in human beings, which calls for an alternative drug discovery using natural sources. Endophytes present themselves as a storehouse of many bioactive metabolites such as phenolic acids, alkaloids, quinones, steroids, saponins, tannins, and terpenoids which makes them a promising candidate for anticancer, antimalarial, antituberculosis, antiviral, antidiabetic, anti-inflammatory, antiarthritis, and immunosuppressive properties among many others, even though the primary function of bioactive compounds from endophytes is to make the host plants resistant to both abiotic and biotic stresses. Endophytes still present themselves as a peculiar source of possible drugs. This study elucidates the mechanisms employed by endophytes in protecting the plant from diseases and different bioactivities of importance to humans with a focus on endophytic bacteria and fungi.
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Affiliation(s)
| | - Olubukola Oluranti Babalola
- Food Security and Safety Niche, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho, South Africa
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28
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Meta-analysis on big data of bioactive compounds from mangrove ecosystem to treat neurodegenerative disease. Scientometrics 2020. [DOI: 10.1007/s11192-020-03355-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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29
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Gotthardt M, Kanawati B, Schmidt F, Asam S, Hammerl R, Frank O, Hofmann T, Schmitt‐Kopplin P, Rychlik M. Comprehensive Analysis of the
Alternaria
Mycobolome Using Mass Spectrometry Based Metabolomics. Mol Nutr Food Res 2020; 64:e1900558. [DOI: 10.1002/mnfr.201900558] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 09/05/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Marina Gotthardt
- Chair of Analytical Food ChemistryTechnical University of Munich Maximus‐von‐Imhof Forum 2 85354 Freising Germany
| | - Basem Kanawati
- HelmholtzZentrum München Ingolstädter Landstraβe 1 85764 Neuherberg Germany
| | - Frank Schmidt
- Chair of Analytical Food ChemistryTechnical University of Munich Maximus‐von‐Imhof Forum 2 85354 Freising Germany
| | - Stefan Asam
- Chair of Analytical Food ChemistryTechnical University of Munich Maximus‐von‐Imhof Forum 2 85354 Freising Germany
| | - Richard Hammerl
- Chair of Food Chemistry and Molecular SensoryTechnical University of Munich Lise‐Meitner‐Straβe 34 85354 Freising Germany
| | - Oliver Frank
- Chair of Food Chemistry and Molecular SensoryTechnical University of Munich Lise‐Meitner‐Straβe 34 85354 Freising Germany
| | - Thomas Hofmann
- Chair of Food Chemistry and Molecular SensoryTechnical University of Munich Lise‐Meitner‐Straβe 34 85354 Freising Germany
| | - Philippe Schmitt‐Kopplin
- Chair of Analytical Food ChemistryTechnical University of Munich Maximus‐von‐Imhof Forum 2 85354 Freising Germany
- HelmholtzZentrum München Ingolstädter Landstraβe 1 85764 Neuherberg Germany
| | - Michael Rychlik
- Chair of Analytical Food ChemistryTechnical University of Munich Maximus‐von‐Imhof Forum 2 85354 Freising Germany
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30
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Current Progress on Endophytic Microbial Dynamics on Dendrobium Plants. Fungal Biol 2020. [DOI: 10.1007/978-3-030-41870-0_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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31
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Singh K, Dwivedi GR, Sanket AS, Pati S. Therapeutic Potential of Endophytic Compounds: A Special Reference to Drug Transporter Inhibitors. Curr Top Med Chem 2019; 19:754-783. [DOI: 10.2174/1568026619666190412095105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 03/08/2019] [Accepted: 03/09/2019] [Indexed: 12/11/2022]
Abstract
From the discovery to the golden age of antibiotics (miracle), millions of lives have been saved. The era of negligence towards chemotherapeutic agents gave birth to drug resistance. Among all the regulators of drug resistance, drug transporters are considered to be the key regulators for multidrug resistance. These transporters are prevalent from prokaryotes to eukaryotes. Endophytes are one of the unexplored wealths of nature. Endophytes are a model mutualistic partner of plants. They are the reservoir of novel therapeutics. The present review deals with endophytes as novel drug resistance reversal agents by inhibiting the drug transporters across the genera. This review also focuses on drug transporters, and mutualistic chemical diversity, exploring drug transporter modulating potential of endophytes.
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Affiliation(s)
- Khusbu Singh
- Microbiology Department, ICMR-Regional Medical Research Centre, Bhubaneswar, India
| | - Gaurav Raj Dwivedi
- Microbiology Department, ICMR-Regional Medical Research Centre, Bhubaneswar, India
| | - A. Swaroop Sanket
- Microbiology Department, ICMR-Regional Medical Research Centre, Bhubaneswar, India
| | - Sanghamitra Pati
- Microbiology Department, ICMR-Regional Medical Research Centre, Bhubaneswar, India
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Biodiversity of Endophytic Fungi from Diverse Niches and Their Biotechnological Applications. ADVANCES IN ENDOPHYTIC FUNGAL RESEARCH 2019. [DOI: 10.1007/978-3-030-03589-1_6] [Citation(s) in RCA: 105] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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33
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Endophytic Fungi: Biodiversity, Ecological Significance, and Potential Industrial Applications. RECENT ADVANCEMENT IN WHITE BIOTECHNOLOGY THROUGH FUNGI 2019. [DOI: 10.1007/978-3-030-10480-1_1] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Perylenequione Derivatives with Anticancer Activities Isolated from the Marine Sponge-Derived Fungus, Alternaria sp. SCSIO41014. Mar Drugs 2018; 16:md16080280. [PMID: 30110969 PMCID: PMC6117713 DOI: 10.3390/md16080280] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 08/06/2018] [Accepted: 08/08/2018] [Indexed: 12/13/2022] Open
Abstract
Seven new secondary metabolites classified as two perylenequinone derivatives (1 and 2), an altenusin derivative (3), two phthalide racemates (4 and 5), and two phenol derivatives (6 and 7), along with twenty-one known compounds (8–28) were isolated from cultures of the sponge-derived fungus, Alternaria sp. SCSIO41014. The structures and absolute configurations of these new compounds (1–7) were determined by spectroscopic analysis, X-ray single crystal diffraction, chiral-phase HPLC separation, and comparison of ECD spectra to calculations. Altertoxin VII (1) is the first example possessing a novel 4,8-dihydroxy-substituted perylenequinone derivative, while the phenolic hydroxy groups have commonly always substituted at C-4 and C-9. Compound 1 exhibited cytotoxic activities against human erythroleukemia (K562), human gastric carcinoma cells (SGC-7901), and hepatocellular carcinoma cells (BEL-7402) with IC50 values of 26.58 ± 0.80, 8.75 ± 0.13, and 13.11 ± 0.95 μg/mL, respectively. Compound 11 showed selectively cytotoxic activity against K562, with an IC50 value of 19.67 ± 0.19 μg/mL. Compound 25 displayed moderate inhibitory activity against Staphylococcus aureus with an MIC value of 31.25 μg/mL.
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35
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Sreenivasulu C, Satyanarayana G. Zinc-Chloride-Promoted Domino Reaction of Phenols with Terminal Alkynes under Solvent-Free Conditions: An Efficient Synthesis of Chromenes. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800391] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
| | - Gedu Satyanarayana
- Department of Chemistry; Indian Institute of Technology Hyderabad; 502 285 Kandi, Sangareddy Telangana India
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36
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37
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Endophytic Fungi and Bioactive Metabolites Production: An Update. Microb Biotechnol 2018. [DOI: 10.1007/978-981-10-7140-9_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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38
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Askin S, Bond TEH, Sorenson AE, Moreau MJJ, Antony H, Davis RA, Schaeffer PM. Selective protein unfolding: a universal mechanism of action for the development of irreversible inhibitors. Chem Commun (Camb) 2018; 54:1738-1741. [DOI: 10.1039/c8cc00090e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Selective protein unfolding was combined with high-throughput differential scanning fluorimetry of GFP-tagged proteins for the identification of irreversible enzyme inhibitors.
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Affiliation(s)
- Samuel Askin
- Centre for Biodiscovery & Molecular Development of Therapeutics
- James Cook University
- 142
- James Cook Drive
- Townsville
| | - Thomas E. H. Bond
- Centre for Biodiscovery & Molecular Development of Therapeutics
- James Cook University
- 142
- James Cook Drive
- Townsville
| | - Alanna E. Sorenson
- Centre for Biodiscovery & Molecular Development of Therapeutics
- James Cook University
- 142
- James Cook Drive
- Townsville
| | - Morgane J. J. Moreau
- Centre for Biodiscovery & Molecular Development of Therapeutics
- James Cook University
- 142
- James Cook Drive
- Townsville
| | - Helma Antony
- Centre for Biodiscovery & Molecular Development of Therapeutics
- James Cook University
- 142
- James Cook Drive
- Townsville
| | - Rohan A. Davis
- Griffith Institute for Drug Discovery
- Griffith University
- Brisbane
- Australia
| | - Patrick M. Schaeffer
- Centre for Biodiscovery & Molecular Development of Therapeutics
- James Cook University
- 142
- James Cook Drive
- Townsville
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39
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40
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Luo Y, Chen W, Wen L, Zhou L, Kang X, Chen G. A New Hexanedioic Acid Analogue from the Endophytic Fungus Penicillium sp. OC-4 of Orchidantha chinensis. Chem Nat Compd 2017. [DOI: 10.1007/s10600-017-2135-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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41
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Hickert S, Hermes L, Marques LMM, Focke C, Cramer B, Lopes NP, Flett B, Humpf HU. Alternaria toxins in South African sunflower seeds: cooperative study. Mycotoxin Res 2017; 33:309-321. [DOI: 10.1007/s12550-017-0290-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 07/13/2017] [Accepted: 07/14/2017] [Indexed: 12/25/2022]
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42
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Mao Z, Lai D, Liu X, Fu X, Meng J, Wang A, Wang X, Sun W, Liu ZL, Zhou L, Liu Y. Dibenzo-α-pyrones: a new class of larvicidal metabolites against Aedes aegypti from the endophytic fungus Hyalodendriella sp. Ponipodef12. PEST MANAGEMENT SCIENCE 2017; 73:1478-1485. [PMID: 27862895 DOI: 10.1002/ps.4481] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 10/27/2016] [Accepted: 11/08/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND In our search for new agrochemicals from endophytic fungi, the crude extract of the endophytic Hyalodendriella sp. Ponipodef12 associated with the hybrid 'Neva' of Populus deltoides Marsh × P. nigra L. was found to possess larvicidal activity against Aedes aegypti. RESULTS Fractionation of the extract has led to the isolation of 11 dibenzo-α-pyrones (1-11), including three new congeners: hyalodendriols A-C (1-3). The structures of the new compounds were elucidated by comprehensive spectroscopic analyses, including the modified Mosher's method for the assignment of the absolute configuration. Compounds 2-7 showed potent larvicidal activities against the fourth-instar larvae of A. aegypti with IC50 values ranging from 7.21 to 120.81 µg mL-1 . Among them, penicilliumolide D (6) displayed the strongest activity (IC50 = 7.21 µg mL-1 ). A structure-larvicidal activity relationship was discussed. The possible mode of action of these compounds was assessed for their acetylcholinesterase inhibitory activities. In addition, hyalodendriol C (3) displayed antibacterial activity against Bacillus subtilis and Xanthomonas vesicatoria, and exhibited strong inhibition against the spore germination of Magnaporthe oryzae. CONCLUSION Our study revealed dibenzo-α-pyrones to be a new class of larvicidal metabolites against A. aegypti. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Ziling Mao
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Daowan Lai
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Xunda Liu
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Xiaoxiang Fu
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Jiajia Meng
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Ali Wang
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Xiaohan Wang
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Weibo Sun
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Zhi Long Liu
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Ligang Zhou
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Yang Liu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-products Processing, Ministry of Agriculture, Beijing, China
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43
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Fierro-Cruz JE, Jiménez P, Coy-Barrera E. Fungal endophytes isolated from Protium heptaphyllum and Trattinnickia rhoifolia as antagonists of Fusarium oxysporum. Rev Argent Microbiol 2017; 49:255-263. [PMID: 28495036 DOI: 10.1016/j.ram.2016.12.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 08/04/2016] [Accepted: 12/28/2016] [Indexed: 01/25/2023] Open
Abstract
Control of fungal pathogens is mainly addressed by the use of chemically synthesized fungicides which result in environmental pollution, developing resistance after prolonged use. In this context, endophytes have been recognized as potential biocontrollers, and also as a promising source of antifungal metabolites. Therefore, as part of our research on phytopathogen controllers, 355 fungal endophytes were isolated from Protium heptaphyllum and Trattinnickia rhoifolia (Burseraceae), both ethnobotanically important tree species that produce secondary metabolites of agronomic and industrial interest. Endophytes were tested by in vitro dual culture against Fusarium oxysporum, a phytopathogen of agronomic importance. Five endophytes exerted at least 40% inhibition on F. oxysporum growth. Ethyl acetate (EtOAc) extracts were obtained from the most active antagonistic fungi, after growing them in three different liquid media. The extracts were tested against a conidial suspension of F. oxysporum by direct bioautography. Two extracts derived from fungi identified as Chaetomium globosum, F211_UMNG and Meyerozima sp. F281_UMNG showed inhibition of pathogen growth. Isolate C. globosum, F211_UMNG was selected for a chemical analysis by RP-HPLC-DAD-ESI-MS and antifungal molecules such as cladosporin, chaetoatrosin A and chaetoviridin A were annotated and identified based on their MS data.
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Affiliation(s)
- Juan E Fierro-Cruz
- Universidad Militar Nueva Granada, Km 2 Cajicá - Zipaquirá, Cajicá, Colombia
| | - Pedro Jiménez
- Universidad Militar Nueva Granada, Km 2 Cajicá - Zipaquirá, Cajicá, Colombia
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Siridechakorn I, Yue Z, Mittraphab Y, Lei X, Pudhom K. Identification of spirobisnaphthalene derivatives with anti-tumor activities from the endophytic fungus Rhytidhysteron rufulum AS21B. Bioorg Med Chem 2017; 25:2878-2882. [PMID: 28274675 DOI: 10.1016/j.bmc.2017.02.054] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Revised: 02/23/2017] [Accepted: 02/24/2017] [Indexed: 11/25/2022]
Abstract
The cultivation of the mangrove-derived fungus Rhytidhysteron rufulum AS21B in acidic condition changed its secondary metabolite profile. Investigation of the culture broth extract led to the isolation and identification of two new spirobisnaphthalenes (1 and 2) together with eleven known compounds (3-13) from the crude extract of the fungus grown under an acidic condition as well as six known compounds (4, 10, 14-17) were isolated from the crude extract of the fungus grown under a neutral condition. Their structures were elucidated on the basis of extensive spectroscopic data. The isolated compounds were evaluated for their cytotoxicity against two human cancer cell lines, Ramos lymphoma and drug resistant NSCLC H1975. Compounds 2 and 10 displayed the most promising anti-tumor activity against both cancer cell lines.
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Affiliation(s)
- Ittipon Siridechakorn
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Synthetic and Functional Biomolecules Center, and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Zongwei Yue
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Synthetic and Functional Biomolecules Center, and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Yanisa Mittraphab
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Xiaoguang Lei
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Synthetic and Functional Biomolecules Center, and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Khanitha Pudhom
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
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Malhadas C, Malheiro R, Pereira JA, de Pinho PG, Baptista P. Antimicrobial activity of endophytic fungi from olive tree leaves. World J Microbiol Biotechnol 2017; 33:46. [PMID: 28168624 DOI: 10.1007/s11274-017-2216-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Accepted: 01/18/2017] [Indexed: 12/14/2022]
Abstract
In this study, the antimicrobial potential of three fungal endophytes from leaves of Olea europaea L. was evaluated and the host plant extract effect in the antimicrobial activity was examined. The volatile compounds produced by endophytes were identified by GC/MS and further correlated with the antimicrobial activity. In potato dextrose agar, both Penicillium commune and Penicillium canescens were the most effective inhibiting Gram-positive and -negative bacteria (up to 2.7-fold compared to 30 µg/mL chloramphenicol), whereas Alternaria alternata was most effective inhibiting yeasts (up to 8.0-fold compared to 25 μg/mL fluconazole). The presence of aqueous leaf extract in culture medium showed to induce or repress the antimicrobial activity, depending on the endophytic species. In the next step, various organic extracts from both A. alternata mycelium and cultured broth were prepared; being ethyl acetate extracts displayed the widest spectrum of anti-microorganisms at a minimum inhibitory concentration ≤0.095 mg/mL. The volatile composition of the fungi that displayed the highest (A. alternata) and the lowest (P. canescens) antimicrobial activity against yeasts revealed the presence of six volatiles, being the most abundant components (3-methyl-1-butanol and phenylethyl alcohol) ascribed with antimicrobial potentialities. Overall the results highlighted for the first time the antimicrobial potential of endophytic fungi from O. europaea and the possibility to be exploited for their antimicrobial agents.
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Affiliation(s)
- Cynthia Malhadas
- REQUIMTE-LAQV, School of Agriculture, Polytechnic Institute of Bragança, Campus de Santa Apolónia, 5300-253, Bragança, Portugal
| | - Ricardo Malheiro
- REQUIMTE-LAQV, School of Agriculture, Polytechnic Institute of Bragança, Campus de Santa Apolónia, 5300-253, Bragança, Portugal
| | - José Alberto Pereira
- REQUIMTE-LAQV, School of Agriculture, Polytechnic Institute of Bragança, Campus de Santa Apolónia, 5300-253, Bragança, Portugal
| | - Paula Guedes de Pinho
- REQUIMTE/Laboratory of Toxicology, Faculty of Pharmacy, Porto University, Rua Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal
| | - Paula Baptista
- REQUIMTE-LAQV, School of Agriculture, Polytechnic Institute of Bragança, Campus de Santa Apolónia, 5300-253, Bragança, Portugal.
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Jarolim K, Del Favero G, Ellmer D, Stark TD, Hofmann T, Sulyok M, Humpf HU, Marko D. Dual effectiveness of Alternaria but not Fusarium mycotoxins against human topoisomerase II and bacterial gyrase. Arch Toxicol 2016; 91:2007-2016. [PMID: 27682608 PMCID: PMC5364253 DOI: 10.1007/s00204-016-1855-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 09/15/2016] [Indexed: 11/28/2022]
Abstract
Type II DNA-topoisomerases (topo II) play a crucial role in the maintenance of DNA topology. Previously, fungi of the Alternaria genus were found to produce mycotoxins that target human topo II. These results implied the question why a fungus should produce secondary metabolites that target a human enzyme. In the current work, the homology between human topo II and its bacterial equivalent, gyrase, served as basis to study a potential dual inhibition of both enzymes by mycotoxins. A total of 15 secondary metabolites produced by fungi of the genera Alternaria and Fusarium were assessed for their impact on topo II of human and bacterial origin in the decatenation and the supercoiling assay, respectively. In line with the theory of dual topo II inhibition, six of the tested Alternaria mycotoxins were active against both enzymes, the dibenzo-α-pyrones alternariol (AOH) and alternariol monomethyl ether (AME), as well as the perylene-quinones altertoxin I (ATX I) and II (ATX II), alterperylenol (ALP) and stemphyltoxin III (STTX III). The Alternaria metabolites altersetin (ALN), macrosporin (MAC), altenusine (ALS) and pyrenophorol (PYR) impaired the function of human topo II, but did not show any effect on gyrase. The potency to inhibit topo II activity declined in the row STTX III (initial inhibitory concentration 10 µM) > AOH (25 µM) = AME (25 µM) = ALS (25 µM) = ATX II (25 µM) > ALN (50 µM) = ATX I (50 µM) > ALP (75 µM) = PYR (75 µM) > MAC (150 µM). Inhibition of gyrase activity was most pronounced for AOH and AME (initial inhibitory concentration 10 µM) followed by ATX II (25 µM) > ATX I = ALP = STTX III (50 µM). In contrast, none of the investigated Fusarium mycotoxins deoxynivalenol (DON), fumonisin B1, fusarin C and moniliformin, as well as the Alternaria metabolite tentoxin, had any impact on the activity of neither human nor bacterial topo II.
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Affiliation(s)
- Katharina Jarolim
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, 1090, Vienna, Austria
| | - Giorgia Del Favero
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, 1090, Vienna, Austria
| | - Doris Ellmer
- Chair of Food Chemistry and Molecular Sensory Science, Technical University of Munich, 85354, Freising, Germany
| | - Timo D Stark
- Chair of Food Chemistry and Molecular Sensory Science, Technical University of Munich, 85354, Freising, Germany
| | - Thomas Hofmann
- Chair of Food Chemistry and Molecular Sensory Science, Technical University of Munich, 85354, Freising, Germany
| | - Michael Sulyok
- Department IFA-Tulln, University of Natural Resources and Life Sciences Vienna (BOKU), 3430, Tulln, Austria
| | - Hans-Ulrich Humpf
- Institute of Food Chemistry, Westfälische Wilhelms-Universität Münster, 48149, Münster, Germany
| | - Doris Marko
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, 1090, Vienna, Austria.
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Lai D, Wang A, Cao Y, Zhou K, Mao Z, Dong X, Tian J, Xu D, Dai J, Peng Y, Zhou L, Liu Y. Bioactive Dibenzo-α-pyrone Derivatives from the Endophytic Fungus Rhizopycnis vagum Nitaf22. JOURNAL OF NATURAL PRODUCTS 2016; 79:2022-31. [PMID: 27441892 DOI: 10.1021/acs.jnatprod.6b00327] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Six new dibenzo-α-pyrones, rhizopycnolides A (1) and B (2) and rhizopycnins A-D (3-6), together with eight known congeners (7-14), were isolated from the endophytic fungus Rhizopycnis vagum Nitaf22 obtained from Nicotiana tabacum. The structures of the new compounds were unambiguously elucidated using NMR, HRESIMS, TDDFT ECD calculation, and X-ray crystallography data. Rhizopycnolides A (1) and B (2) feature an uncommon γ-butyrolactone-fused dibenzo-α-pyrone tetracyclic skeleton (6/6/6/5), while rhizopycnin B (4) was the first amino group containing dibenzo-α-pyrone. Rhizopycnolides A (1) and B (2) are proposed to be biosynthesized from polyketide and tricarboxylic acid cycle pathways. The isolated compounds were tested for their antibacterial, antifungal, and cytotoxic activities. Among them, rhizopycnolide A (1), rhizopycnins C (5) and D (6), TMC-264 (8), penicilliumolide D (11), and alternariol (12) were active against the tested pathogenic bacteria Agrobacterium tumefaciens, Bacillus subtilis, Pseudomonas lachrymans, Ralstonia solanacearum, Staphylococcus hemolyticus, and Xanthomonas vesicatoria with MIC values in the range 25-100 μg/mL. Rhizopycnin D (6) and TMC-264 (8) strongly inhibited the spore germination of Magnaporthe oryzae with IC50 values of 9.9 and 12.0 μg/mL, respectively. TMC-264 (8) showed potent cytotoxicity against five human cancer cell lines (HCT-116, HepG2, BGC-823, NCI-H1650, and A2780) with IC50 values of 3.2-7.8 μM.
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Affiliation(s)
- Daowan Lai
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University , Beijing 100193, People's Republic of China
| | - Ali Wang
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University , Beijing 100193, People's Republic of China
| | - Yuheng Cao
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University , Beijing 100193, People's Republic of China
| | - Kaiyi Zhou
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University , Beijing 100193, People's Republic of China
| | - Ziling Mao
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University , Beijing 100193, People's Republic of China
| | - Xuejiao Dong
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University , Beijing 100193, People's Republic of China
| | - Jin Tian
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University , Beijing 100193, People's Republic of China
- National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences , Beijing 100101, People's Republic of China
| | - Dan Xu
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University , Beijing 100193, People's Republic of China
| | - Jungui Dai
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science & Peking Union Medical College , Beijing 100050, People's Republic of China
| | - Yu Peng
- Technical Centre of Hunan Tobacco Industry Co. Ltd. , Changsha 410014, People's Republic of China
| | - Ligang Zhou
- Key Laboratory of Plant Pathology, Ministry of Agriculture/Department of Plant Pathology, College of Plant Protection, China Agricultural University , Beijing 100193, People's Republic of China
| | - Yang Liu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-products Processing, Ministry of Agriculture , Beijing 100193, People's Republic of China
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Liu Y, Nan L, Liu J, Yan H, Zhang D, Han X. Isolation and identification of resveratrol-producing endophytes from wine grape Cabernet Sauvignon. SPRINGERPLUS 2016; 5:1029. [PMID: 27441148 PMCID: PMC4938804 DOI: 10.1186/s40064-016-2571-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Accepted: 06/14/2016] [Indexed: 11/24/2022]
Abstract
OBJECTIVES Obtain endophyte strains with effective resveratrol production from superior grapevine variety Cabernet Sauvignon in Xinjiang and determine related taxonomic position of the strain. RESULTS Seventy-three strains of endophytes, including 23 strains of bacteria, 14 ones of actinomycetes, 24 fungus and 12 yeasts, were isolated, respectively. The distribution law of endophytes was spring (30.14 %) = summer (30.14 %) < autumn (39.73 %) in different seasons, while the fruit (12.33 %) < leaf (20.55 %) < stem (32.88 %) < root (34.25 %) in different tissues and organs. From the 36 strains of endophytic fungi isolated, seven strains producing polyphenols were screened by ferric chloride-potassium ferricyanide color reaction. C2J6, stable genetic properties producing highly 1.48 mg L(-1) of resveratrol, was identified as Aspergillus niger by 26S rDNA-ITS sequence analysis after thin-layer chromatography sieve analysis, ultra violet wavelength scanning and high performance liquid chromatography, respectively. CONCLUSIONS There were the certain number and kinds of endophytes in the various tissues of Cabernet Sauvignon, which, to a certain extent, reflected the biological diversity of plant endophytes. The fact that the fungus C2J6 producing resveratrol in grape was acquired attested the special ability of the endophytes to produce the same or similar bioactive substances as the host plants.
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Affiliation(s)
- Ya Liu
- />College of Food, Shihezi University, Shihezi, 832000 People’s Republic of China
| | - Lijun Nan
- />College of Food, Shihezi University, Shihezi, 832000 People’s Republic of China
| | - Junchao Liu
- />College of Food, Shihezi University, Shihezi, 832000 People’s Republic of China
| | - Haiyan Yan
- />College of Food, Shihezi University, Shihezi, 832000 People’s Republic of China
| | - Dianpeng Zhang
- />Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097 People’s Republic of China
| | - Xinnian Han
- />Institute of Crops, Xinjiang Academy of Agriculture and Reclamation Science, Shihezi, 832000 People’s Republic of China
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He JW, Wang CX, Yang L, Chen GD, Hu D, Guo LD, Yao XS, Gao H. A Pair of New Polyketide Enantiomers from Three Endolichenic Fungal Strains Nigrospora sphaerica, Alternaria alternata, and Phialophora sp. Nat Prod Commun 2016. [DOI: 10.1177/1934578x1601100633] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A pair of new enantiomeric polyketides, (-)- and (+)-nigrosporaol A (1a and 1b), along with one related known compound, (±)-alternarienoic acid (2), were isolated from three endolichenic fungal strains, Nigrospora sphaerica (No.83-1-1-2), Alternaria alternata (No.58-8-4-1), and Phialophora sp.(No.96-1-8-1). Their structures, including the absolute configurations, were elucidated on the basis of spectroscopic methods, X-ray diffraction analysis, and the modified Mosher's method.
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Affiliation(s)
- Jun-Wei He
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China
- Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, China
| | - Chuan-Xi Wang
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Li Yang
- Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, China
| | - Guo-Dong Chen
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Dan Hu
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Liang-Dong Guo
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100190, China
| | - Xin-Sheng Yao
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Hao Gao
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China
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Garazd YL, Garazd MM. Natural Dibenzo[b,d]Pyran-6-Ones: Structural Diversity and Biological Activity. Chem Nat Compd 2016. [DOI: 10.1007/s10600-016-1536-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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