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Bohni N, Hofstetter V, Gindro K, Buyck B, Schumpp O, Bertrand S, Monod M, Wolfender JL. Production of Fusaric Acid by Fusarium spp. in Pure Culture and in Solid Medium Co-Cultures. Molecules 2016; 21:370. [PMID: 26999098 PMCID: PMC6274276 DOI: 10.3390/molecules21030370] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Revised: 01/10/2016] [Accepted: 01/25/2016] [Indexed: 01/13/2023] Open
Abstract
The ability of fungi isolated from nails of patients suffering from onychomycosis to induce de novo production of bioactive compounds in co-culture was examined. Comparison between the metabolite profiles produced by Sarocladium strictum, by Fusarium oxysporum, and by these two species in co-culture revealed de novo induction of fusaric acid based on HRMS. Structure confirmation of this toxin, using sensitive microflow NMR, required only three 9-cm Petri dishes of fungal culture. A targeted metabolomics study based on UHPLC-HRMS confirmed that the production of fusaric acid was strain-dependent. Furthermore, the detected toxin levels suggested that onychomycosis-associated fungal strains of the F. oxysporum and F. fujikuroi species complexes are much more frequently producing fusaric acid, and in higher amount, than strains of the F. solani species complex. Fusarium strains producing no significant amounts of this compound in pure culture, were shown to de novo produce that compound when grown in co-culture. The role of fusaric acid in fungal virulence and defense is discussed.
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Affiliation(s)
- Nadine Bohni
- School of Pharmaceutical Sciences, EPGL, University of Geneva, University of Lausanne, Quai Ernest-Ansermet 30, CH-1211 Geneva 4, Switzerland.
| | - Valérie Hofstetter
- Mycology and Biotechnology Group, Institute for Plant Production Sciences IPS, Agroscope, Route de Duillier 50, P. O. Box 1012, CH-1260 Nyon, Switzerland.
| | - Katia Gindro
- Mycology and Biotechnology Group, Institute for Plant Production Sciences IPS, Agroscope, Route de Duillier 50, P. O. Box 1012, CH-1260 Nyon, Switzerland.
| | - Bart Buyck
- Muséum National d'Histoire Naturelle, Département Systématique et Évolution, CP 39, ISYEB, UMR 7205 CNRS MNHN UPMC EPHE, 12 rue Buffon, F-75005 Paris, France.
| | - Olivier Schumpp
- Mycology and Biotechnology Group, Institute for Plant Production Sciences IPS, Agroscope, Route de Duillier 50, P. O. Box 1012, CH-1260 Nyon, Switzerland.
| | - Samuel Bertrand
- School of Pharmaceutical Sciences, EPGL, University of Geneva, University of Lausanne, Quai Ernest-Ansermet 30, CH-1211 Geneva 4, Switzerland.
| | - Michel Monod
- Department of Dermatology and Venereology, Laboratory of Mycology, Centre Hospitalier Universitaire Vaudois, CH-1011 Lausanne, Switzerland.
| | - Jean-Luc Wolfender
- School of Pharmaceutical Sciences, EPGL, University of Geneva, University of Lausanne, Quai Ernest-Ansermet 30, CH-1211 Geneva 4, Switzerland.
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