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Maud L, Boyer F, Durrieu V, Bornot J, Lippi Y, Naylies C, Lorber S, Puel O, Mathieu F, Snini SP. Effect of Streptomyces roseolus Cell-Free Supernatants on the Fungal Development, Transcriptome, and Aflatoxin B1 Production of Aspergillus flavus. Toxins (Basel) 2023; 15:428. [PMID: 37505697 PMCID: PMC10467112 DOI: 10.3390/toxins15070428] [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: 06/02/2023] [Revised: 06/22/2023] [Accepted: 06/27/2023] [Indexed: 07/29/2023] Open
Abstract
Crop contamination by aflatoxin B1 (AFB1), an Aspergillus-flavus-produced toxin, is frequently observed in tropical and subtropical regions. This phenomenon is emerging in Europe, most likely as a result of climate change. Alternative methods, such as biocontrol agents (BCAs), are currently being developed to reduce the use of chemicals in the prevention of mycotoxin contamination. Actinobacteria are known to produce many bioactive compounds, and some of them can reduce in vitro AFB1 concentration. In this context, the present study aims to analyze the effect of a cell-free supernatant (CFS) from Streptomyces roseolus culture on the development of A. flavus, as well as on its transcriptome profile using microarray assay and its impact on AFB1 concentration. Results demonstrated that in vitro, the S. roseolus CFS reduced the dry weight and conidiation of A. flavus from 77% and 43%, respectively, and was therefore associated with a reduction in AFB1 concentration reduction to levels under the limit of quantification. The transcriptomic data analysis revealed that 5198 genes were differentially expressed in response to the CFS exposure and among them 5169 were downregulated including most of the genes involved in biosynthetic gene clusters. The aflatoxins' gene cluster was the most downregulated. Other gene clusters, such as the aspergillic acid, aspirochlorine, and ustiloxin B gene clusters, were also downregulated and associated with a variation in their concentration, confirmed by LC-HRMS.
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Affiliation(s)
- Louise Maud
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, 31326 Toulouse, France; (L.M.); (F.B.); (J.B.)
| | - Florian Boyer
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, 31326 Toulouse, France; (L.M.); (F.B.); (J.B.)
| | - Vanessa Durrieu
- Laboratoire de Chimie Agro-Industrielle (LCA), Université de Toulouse, INRAE, INPT, 4 Allée Emile Monso, 31030 Toulouse, France;
| | - Julie Bornot
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, 31326 Toulouse, France; (L.M.); (F.B.); (J.B.)
| | - Yannick Lippi
- Toxalim (Research Center in Food Toxicology), Université de Toulouse, INRAE, ENVT, EI-Purpan, UPS, 31062 Toulouse, France; (Y.L.); (C.N.); (S.L.); (O.P.)
| | - Claire Naylies
- Toxalim (Research Center in Food Toxicology), Université de Toulouse, INRAE, ENVT, EI-Purpan, UPS, 31062 Toulouse, France; (Y.L.); (C.N.); (S.L.); (O.P.)
| | - Sophie Lorber
- Toxalim (Research Center in Food Toxicology), Université de Toulouse, INRAE, ENVT, EI-Purpan, UPS, 31062 Toulouse, France; (Y.L.); (C.N.); (S.L.); (O.P.)
| | - Olivier Puel
- Toxalim (Research Center in Food Toxicology), Université de Toulouse, INRAE, ENVT, EI-Purpan, UPS, 31062 Toulouse, France; (Y.L.); (C.N.); (S.L.); (O.P.)
| | - Florence Mathieu
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, 31326 Toulouse, France; (L.M.); (F.B.); (J.B.)
| | - Selma P. Snini
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, 31326 Toulouse, France; (L.M.); (F.B.); (J.B.)
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Gannett C, Banks P, Chuong C, Weger-Lucarelli J, Mevers E, Lowell AN. Semisynthetic blasticidin S ester derivatives show enhanced antibiotic activity. RSC Med Chem 2023; 14:782-789. [PMID: 37122539 PMCID: PMC10131614 DOI: 10.1039/d2md00412g] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 03/05/2023] [Indexed: 03/19/2023] Open
Abstract
A rich potential source of new antibiotics are undeveloped natural product cytotoxins, provided they can be derivatized to restrict their activity to bacteria. In this work, we describe modification of one such candidate, the broad-spectrum, translation termination inhibitor, blasticidin S. By semisynthetically modifying blasticidin S, we produced a series of ester derivatives of this highly polar, zwitterionic compound in a single step. These derivatives showed a marked increase in activity against Gram-positive bacteria and an increase in selectivity index for pathogenic bacteria over human cells. The results of this study suggest that semisynthetic derivatization of blasticidin S and other neglected natural product antimicrobials has the potential to increase their activity against and selectivity for bacteria, an approach that can be leveraged for the development of leads against antimicrobial resistant pathogens.
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Affiliation(s)
- Cole Gannett
- Department of Chemistry, Virginia Polytechnic Institute and State University (Virginia Tech) Blacksburg VA 24061 USA (540) 231 5842
- Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University (Virginia Tech) Blacksburg VA 24061 USA
| | - Paige Banks
- Department of Chemistry, Virginia Polytechnic Institute and State University (Virginia Tech) Blacksburg VA 24061 USA (540) 231 5842
| | - Christina Chuong
- Department of Biomedical Sciences and Pathobiology, VA-MD Regional College of Veterinary Medicine, Virginia Polytechnic Institute and State University (Virginia Tech) Blacksburg VA 24061 USA
- Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University (Virginia Tech) Blacksburg VA 24061 USA
| | - James Weger-Lucarelli
- Department of Biomedical Sciences and Pathobiology, VA-MD Regional College of Veterinary Medicine, Virginia Polytechnic Institute and State University (Virginia Tech) Blacksburg VA 24061 USA
- Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University (Virginia Tech) Blacksburg VA 24061 USA
| | - Emily Mevers
- Department of Chemistry, Virginia Polytechnic Institute and State University (Virginia Tech) Blacksburg VA 24061 USA (540) 231 5842
- Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University (Virginia Tech) Blacksburg VA 24061 USA
- Faculty of Health Sciences, Virginia Polytechnic Institute and State University (Virginia Tech) Blacksburg VA 24061 USA
| | - Andrew N Lowell
- Department of Chemistry, Virginia Polytechnic Institute and State University (Virginia Tech) Blacksburg VA 24061 USA (540) 231 5842
- Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University (Virginia Tech) Blacksburg VA 24061 USA
- Faculty of Health Sciences, Virginia Polytechnic Institute and State University (Virginia Tech) Blacksburg VA 24061 USA
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Yoshinari T, Watanabe M, Hara-Kudo Y. Cross-genus inhibitory activity of polyoxins against aflatoxin production by Aspergillus parasiticus and fumonisin production by Fusarium fujikuroi. FEMS Microbiol Lett 2022; 369:6596283. [PMID: 35641197 DOI: 10.1093/femsle/fnac048] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 05/25/2022] [Indexed: 11/14/2022] Open
Abstract
Co-exposure to aflatoxin and fumonisin is a health concern where corn is a staple food, and a method to prevent co-contamination of these mycotoxins in foods is urgently needed. Polyoxins are chitin synthase inhibitors produced by Streptomyces cacaoi var. asoensis. The aflatoxin production inhibitory activity of a commercially available polyoxin D and four polyoxins purified from polyoxin AL water-soluble powder, an agricultural chemical containing polyoxins, was tested. The five polyoxins dose-dependently inhibited aflatoxin production by Aspergillus parasiticus and the IC50 values of polyoxin A, B, D, K and L were 16, 74, 110, 9 and 280 µmol L-1, respectively. Polyoxins also inhibited fumonisin production by Fusarium fujikuroi, and the IC50 values of polyoxin B, D, K and L were 270, 42, 65 and 62 µmol L-1, respectively. Polyoxins repressed the transcription of genes encoding proteins required for aflatoxin biosynthesis in A. parasiticus and fumonisin biosynthesis in F. fujikuroi. Polyoxin K and D also inhibited conidiation in A. parasiticus and F. fujikuroi, respectively. These results suggest that a mixture of polyoxins may effectively prevent co-contamination of aflatoxin and fumonisin in foods.
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Affiliation(s)
- Tomoya Yoshinari
- Division of Microbiology, National Institute of Health Sciences, Kawasaki, Kanagawa 210-9501, Japan
| | - Maiko Watanabe
- Division of Microbiology, National Institute of Health Sciences, Kawasaki, Kanagawa 210-9501, Japan
| | - Yukiko Hara-Kudo
- Division of Microbiology, National Institute of Health Sciences, Kawasaki, Kanagawa 210-9501, Japan
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Skrzyńska A, Frankowski S, Topolska A, Dyguda M, Gao XY, Xu CJ, Chen YC, Albrecht Ł. Enantioselective H-bond-directed vinylogous iminium ion strategy for the functionalization of vinyl-substituted heteroaryl aldehydes. Chem Commun (Camb) 2021; 57:1667-1670. [PMID: 33464255 DOI: 10.1039/d0cc07765h] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work the first H-bond-directed vinylogous iminium ion strategy has been developed as a convenient strategy for the γ,δ-functionalization of vinyl-substituted heteroaromatic aldehydes. Their reaction with α-mercaptoketones proceeds in a cascade manner involving 1,6-addition followed by intramolecular aldol reaction. Excellent stereoselectivities have been obtained as a result of the H-bond interactions controlling the outcome of the cyclization step. The application of the strategy for the synthesis of tricyclic compounds bearing furan, tetrahydrothiophene and dihydropyran moieties has also been demonstrated.
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Affiliation(s)
- Anna Skrzyńska
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Żeromskiego 116, 90-924 Łódź, Poland.
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Bratiichuk D, Kurylenko O, Vasylyshyn R, Zuo M, Kang Y, Dmytruk K, Sibirny A. Development of new dominant selectable markers for the nonconventional yeasts
Ogataea polymorpha
and
Candida famata. Yeast 2020; 37:505-513. [DOI: 10.1002/yea.3467] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 04/05/2020] [Accepted: 04/13/2020] [Indexed: 12/18/2022] Open
Affiliation(s)
- Dmytro Bratiichuk
- Institute of Cell Biology National Academy of Sciences of Ukraine Lviv Ukraine
| | - Olena Kurylenko
- Institute of Cell Biology National Academy of Sciences of Ukraine Lviv Ukraine
| | | | - MingXing Zuo
- Institute of Cell Biology National Academy of Sciences of Ukraine Lviv Ukraine
- Key Laboratory of Medical Microbiology and Parasitology of Education Department of Guizhou Guizhou Medical University Guiyang China
| | - Yingqian Kang
- Key Laboratory of Medical Microbiology and Parasitology of Education Department of Guizhou Guizhou Medical University Guiyang China
| | - Kostyantyn Dmytruk
- Institute of Cell Biology National Academy of Sciences of Ukraine Lviv Ukraine
| | - Andriy Sibirny
- Institute of Cell Biology National Academy of Sciences of Ukraine Lviv Ukraine
- Department of Microbiology and Molecular Genetics University of Rzeszów Rzeszów Poland
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El Khoury R, Choque E, El Khoury A, Snini SP, Cairns R, Andriantsiferana C, Mathieu F. OTA Prevention and Detoxification by Actinobacterial Strains and Activated Carbon Fibers: Preliminary Results. Toxins (Basel) 2018; 10:toxins10040137. [PMID: 29587362 PMCID: PMC5923303 DOI: 10.3390/toxins10040137] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 03/20/2018] [Accepted: 03/22/2018] [Indexed: 11/26/2022] Open
Abstract
Ochratoxin A (OTA) is a mycotoxin produced by several species of Aspergillus and Penicillium that contaminate food and feed raw materials. To reduce OTA contamination, we first tested in vitro, actinobacterial strains as potential biocontrol agents and afterward, through a physical decontamination method using activated carbon fibers (ACFs). Actinobacterial strains were screened for their ability to reduce OTA in solid co-culture with A. carbonarius, which is the major OTA-producing species in European vineyards. Four strains showed a high affinity for removing OTA (67%–83%) with no significant effect on fungal growth (<20%). The mechanism of action was first studied by analyzing the expression of OTA cluster genes (acOTApks, acOTAnrps, acOTAhal) by RT-qPCR showing a drastic reduction in all genes (7–15 times). Second, the ability of these strains to degrade OTA was assessed in vitro on ISP2 solid medium supplemented with OTA (100 µg/L). Two strains reduced OTA to undetectable levels. As for the physical method, high adsorption rates were obtained for ACFs at 0.8 g/L with a 50% adsorption of OTA in red wine by AC15 and 52% in grape juice by AC20 within 24 h. These promising methods could be complementarily applied toward reducing OTA contamination in food chains, which promotes food safety and quality.
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Affiliation(s)
- Rhoda El Khoury
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, Toulouse, France; Avenue de l'Agrobiopole-BP 32607-Auzeville-Tolosane 31326 CASTANET-TOLOSAN CEDEX.
| | - Elodie Choque
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, Toulouse, France; Avenue de l'Agrobiopole-BP 32607-Auzeville-Tolosane 31326 CASTANET-TOLOSAN CEDEX.
- Unité de Recherche Biologie des Plantes et Innovation (BIOPI-EA 3900), Université de Picardie Jules Verne, 33 rue Saint Leu, 80039 Amiens CEDEX, France.
| | - Anthony El Khoury
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, Toulouse, France; Avenue de l'Agrobiopole-BP 32607-Auzeville-Tolosane 31326 CASTANET-TOLOSAN CEDEX.
| | - Selma P Snini
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, Toulouse, France; Avenue de l'Agrobiopole-BP 32607-Auzeville-Tolosane 31326 CASTANET-TOLOSAN CEDEX.
| | - Robbie Cairns
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, Toulouse, France; Avenue de l'Agrobiopole-BP 32607-Auzeville-Tolosane 31326 CASTANET-TOLOSAN CEDEX.
| | - Caroline Andriantsiferana
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, Toulouse, France; Avenue de l'Agrobiopole-BP 32607-Auzeville-Tolosane 31326 CASTANET-TOLOSAN CEDEX.
| | - Florence Mathieu
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, Toulouse, France; Avenue de l'Agrobiopole-BP 32607-Auzeville-Tolosane 31326 CASTANET-TOLOSAN CEDEX.
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