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Latham RL, Boyle JT, Barbano A, Loveman WG, Brown NA. Diverse mycotoxin threats to safe food and feed cereals. Essays Biochem 2023; 67:797-809. [PMID: 37313591 PMCID: PMC10500202 DOI: 10.1042/ebc20220221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 05/15/2023] [Accepted: 05/18/2023] [Indexed: 06/15/2023]
Abstract
Toxigenic fungi, including Aspergillus and Fusarium species, contaminate our major cereal crops with an array of harmful mycotoxins, which threaten the health of humans and farmed animals. Despite our best efforts to prevent crop diseases, or postharvest spoilage, our cereals are consistently contaminated with aflatoxins and deoxynivalenol, and while established monitoring systems effectively prevent acute exposure, Aspergillus and Fusarium mycotoxins still threaten our food security. This is through the understudied impacts of: (i) our chronic exposure to these mycotoxins, (ii) the underestimated dietary intake of masked mycotoxins, and (iii) the synergistic threat of cocontaminations by multiple mycotoxins. Mycotoxins also have profound economic consequences for cereal and farmed-animal producers, plus their associated food and feed industries, which results in higher food prices for consumers. Climate change and altering agronomic practices are predicted to exacerbate the extent and intensity of mycotoxin contaminations of cereals. Collectively, this review of the diverse threats from Aspergillus and Fusarium mycotoxins highlights the need for renewed and concerted efforts to understand, and mitigate, the increased risks they pose to our food and feed cereals.
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Affiliation(s)
- Rosie L Latham
- Milner Centre for Evolution, Department of Life Sciences, University of Bath, Bath, U.K
- Department of Life Sciences, University of Bath, Bath, U.K
| | - Jeremy T Boyle
- Department of Life Sciences, University of Bath, Bath, U.K
| | - Anna Barbano
- Department of Life Sciences, University of Bath, Bath, U.K
| | | | - Neil A Brown
- Milner Centre for Evolution, Department of Life Sciences, University of Bath, Bath, U.K
- Department of Life Sciences, University of Bath, Bath, U.K
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2
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Inhibitory Effect Mediated by Deoxynivalenol on Rumen Fermentation under High-Forage Substrate. FERMENTATION 2022. [DOI: 10.3390/fermentation8080369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Deoxynivalenol (DON) is a type B trichothecene mycotoxin produced by Fusarium fungi. To investigate its ruminal degradability and its effect on rumen fermentation, a 2 × 5 factorial experiment was conducted in vitro with two feed substrates with different forage levels (high forage (HF), forage-to-concentrate = 4:1; low forage (LF), forage-to-concentrate = 1:4) and five DON additions per substrate (0, 5, 10, 15, and 20 mg/kg of dry matter). After 48 h incubation, the DON degradability in the HF group was higher than in the LF group (p < 0.01), and it decreased along with the increase in DON concentrations (p < 0.01), which varied from 57.18% to 29.01% at 48 h. In addition, the gas production rate, total VFA production and microbial crude protein decreased linearly against the increase in DON additions (p < 0.05). Meanwhile, the proportion of CH4 in the fermentation gas end-products increased linearly, especially in the HF group (p < 0.01). In brief, rumen microorganisms presented 29–57% of the DON degradation ability and were particularly significant under a high-forage substrate. Along with the increasing DON addition, the toxin degradability decreased, showing a dose-dependent response. However, DON inhibited rumen fermentation and increased methane production when it exceeded 5 mg/kg of dry matter.
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3
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Becker LL, DeRouchey JM, Woodworth JC, Tokach MD, Goodband RD, Vidal A, Gougoulias C, Gebhardt JT. Evaluation of dietary mycotoxin control strategies on nursery pig growth performance and blood measures. Transl Anim Sci 2022; 6:txac081. [PMID: 35813664 PMCID: PMC9263879 DOI: 10.1093/tas/txac081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 06/11/2022] [Indexed: 12/04/2022] Open
Abstract
A total of 4,318 pigs (337 × 1,050, PIC; initially 6.5 ± 0.08 kg) were used in a 35-day study to evaluate dietary mycotoxin control strategies on nursery pig performance and blood measures. Pigs were weaned at approximately 21 d of age and randomly allotted to 1 of 5 dietary treatments in a randomized complete block design with blocking structure including sow farm origin, date of entry into facility, and average pen BW. A total of 160 pens were used with 80 double-sided 5-hole stainless steel fence line feeders, with feeder serving as the experimental unit. For each feeder, 1 pen contained 27 gilts and 1 pen contained 27 barrows. There were 16 replications per dietary treatment. A common phase 1 diet was fed to all pigs in pelleted form for 7 day prior to treatment diets. Experimental treatments were fed from days 7 to 42 after weaning (days 0 to 35 of the study) and included a low deoxynivalenol (DON) diet (1.12 ± 0.623 mg/kg), high DON diet (2.34 ± 1.809 mg/kg), high DON+ 0.50% sodium metabisulfite (SMB), high DON+ one of two mitigating products; 0.30% Technology1, or 0.30% Technology1+. Technology1 and 1+ are comprised of clays, yeast cell wall components, and a blend of plant extracts. Technology1+ also contains SMB. Overall (days 0 to 35), pigs fed high DON had decreased (P < 0.05) final BW, ADG, and ADFI compared with low DON. Additionally, pigs fed high DON+SMB had increased (P < 0.05) ADG compared with all other treatments. An improvement (P < 0.05) in G:F was observed in pigs fed high DON + SMB or high DON + Technology1+ compared with the low DON or high DON + Technology1 diets with high DON diets intermediate. Pigs fed high DON + SMB or high DON + Technology1 diets had reduced (P < 0.05) total removals and mortality compared with pigs fed low DON diets with high DON and high DON + Technology1+ intermediate. Liquid chromatography/mass spectrometry analysis of circulating blood collected on day 35 revealed that pigs fed high DON or high DON + Technology1 had increased (P < 0.05) DON concentrations compared to low DON with high DON + SMB and high DON + Technology1+ intermediate. In summary, pigs fed high DON diets had reduced performance compared with pigs fed low DON. Sodium metabisulfite in high DON diets provided a benefit in growth performance with ADG and G:F exceeding growth performance in the low DON diet while, the improved G:F ratio combined with other immunometabolic changes (gamma glutamyltransferase and creatine kinase) associated with Technology1+ warrant further investigation.
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Affiliation(s)
- Larissa L Becker
- Department of Animal Sciences and Industry, College of Agriculture, Kansas State University , Manhattan, KS 66506-0201 , USA
| | - Joel M DeRouchey
- Department of Animal Sciences and Industry, College of Agriculture, Kansas State University , Manhattan, KS 66506-0201 , USA
| | - Jason C Woodworth
- Department of Animal Sciences and Industry, College of Agriculture, Kansas State University , Manhattan, KS 66506-0201 , USA
| | - Mike D Tokach
- Department of Animal Sciences and Industry, College of Agriculture, Kansas State University , Manhattan, KS 66506-0201 , USA
| | - Robert D Goodband
- Department of Animal Sciences and Industry, College of Agriculture, Kansas State University , Manhattan, KS 66506-0201 , USA
| | - Arnau Vidal
- Innovad NV/SA , Postbaan 69, 2910 Essen , Belgium
| | | | - Jordan T Gebhardt
- Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University , Manhattan, KS 66506-0201 , USA
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4
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Chen J, Yang S, Li P, Wu A, Nepovimova E, Long M, Wu W, Kuca K. MicroRNA regulates the toxicological mechanism of four mycotoxins in vivo and in vitro. J Anim Sci Biotechnol 2022; 13:37. [PMID: 35197116 PMCID: PMC8867758 DOI: 10.1186/s40104-021-00653-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 11/21/2021] [Indexed: 11/30/2022] Open
Abstract
Mycotoxins can cause body poisoning and induce carcinogenesis, often with a high mortality rate. Therefore, it is of great significance to seek new targets that indicate mycotoxin activity and to diagnose and intervene in mycotoxin-induced diseases in their early stages. MicroRNAs (miRNAs) are physiological regulators whose dysregulation is closely related to the development of diseases. They are thus important markers for the occurrence and development of diseases. In this review, consideration is given to the toxicological mechanisms associated with four major mycotoxins (ochratoxin A, aflatoxin B1, deoxynivalenol, and zearalenone). The roles that miRNAs play in these mechanisms and the interactions between them and their target genes are explained, and summarize the important role of histone modifications in their toxicity. As a result, the ways that miRNAs are regulated in the pathogenicity signaling pathways are revealed which highlights the roles played by miRNAs in preventing and controlling the harmful effects of the mycotoxins. It is hoped that this review will provide a theoretical basis for the prevention and control of the damage caused by these mycotoxins.
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Affiliation(s)
- Jia Chen
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang, 110866, China
| | - Shuhua Yang
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang, 110866, China
| | - Peng Li
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang, 110866, China
| | - Aibo Wu
- SIBS-UGENT-SJTU Joint Laboratory of Mycotoxin Research, CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Eugenie Nepovimova
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, 50003, Czech Republic
| | - Miao Long
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang, 110866, China.
| | - Wenda Wu
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, 50003, Czech Republic. .,MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Kamil Kuca
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, 50003, Czech Republic. .,Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, 50003, Czech Republic.
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5
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Hooft JM, Bureau DP. Deoxynivalenol: Mechanisms of action and its effects on various terrestrial and aquatic species. Food Chem Toxicol 2021; 157:112616. [PMID: 34662691 DOI: 10.1016/j.fct.2021.112616] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 10/02/2021] [Accepted: 10/12/2021] [Indexed: 11/26/2022]
Abstract
Deoxynivalenol, a type B trichothecene mycotoxin produced by Fusarium species of fungi, is a ubiquitious contaminant of cereal grains worldwide. Chronic, low dose consumption of feeds contaminated with DON is associated with a wide range of symptoms in terrestrial and aquatic species including decreased feed intake and feed refusal, reduced weight gain, and altered nutritional efficiency. Acute, high dose exposure to DON may be associated with more severe symptoms such as vomiting, diarrhea, intestinal inflammation and gastrointestinal hemorrhage. The toxicity of DON is partly related to its ability to disrupt eukaryotic protein synthesis via binding to the peptidyl transferase site of the ribosome. Moreover, DON exerts its effects at the cellular level by activating mitogen activated protein kinases (MAPK) through a process known as the ribotoxic stress response (RSR). The outcome of DON-associated MAPK activation is dose and duration dependent; acute low dose exposure results in immunostimulation characterized by the upregulation of cytokines, chemokines and other proinflammatory-related proteins, whereas longer term exposure to higher doses generally results in apoptosis, cell cycle arrest, and immunosuppression. The order of decreasing sensitivity to DON is considered to be: swine > rats > mice > poultry ≈ ruminants. However, studies conducted within the past 10 years have demonstrated that some species of fish, such as rainbow trout, are highly sensitive to DON. The aims of this review are to explore the effects of DON on terrestrial and aquatic species as well as its mechanisms of action, metabolism, and interaction with other Fusarium mycotoxins. Notably, a considerable emphasis is placed on reviewing the effects of DON on different species of fish.
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Affiliation(s)
- Jamie M Hooft
- Wittaya Aqua International, 1 University Ave, Floor 5, Toronto, ON, M5J 2P1, Canada.
| | - Dominique P Bureau
- Wittaya Aqua International, 1 University Ave, Floor 5, Toronto, ON, M5J 2P1, Canada; Department of Animal Biosciences, University of Guelph, 50 Stone Road E, Guelph, ON, N1G 2W1, Canada
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6
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Thapa A, Horgan KA, White B, Walls D. Deoxynivalenol and Zearalenone-Synergistic or Antagonistic Agri-Food Chain Co-Contaminants? Toxins (Basel) 2021; 13:toxins13080561. [PMID: 34437432 PMCID: PMC8402399 DOI: 10.3390/toxins13080561] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 08/03/2021] [Accepted: 08/06/2021] [Indexed: 01/01/2023] Open
Abstract
Deoxynivalenol (DON) and Zearalenone (ZEN) are two commonly co-occurring mycotoxins produced by members of the genus Fusarium. As important food chain contaminants, these can adversely affect both human and animal health. Critically, as they are formed prior to harvesting, their occurrence cannot be eliminated during food production, leading to ongoing contamination challenges. DON is one of the most commonly occurring mycotoxins and is found as a contaminant of cereal grains that are consumed by humans and animals. Consumption of DON-contaminated feed can result in vomiting, diarrhoea, refusal of feed, and reduced weight gain in animals. ZEN is an oestrogenic mycotoxin that has been shown to have a negative effect on the reproductive function of animals. Individually, their mode of action and impacts have been well-studied; however, their co-occurrence is less well understood. This common co-occurrence of DON and ZEN makes it a critical issue for the Agri-Food industry, with a fundamental understanding required to develop mitigation strategies. To address this issue, in this targeted review, we appraise what is known of the mechanisms of action of DON and ZEN with particular attention to studies that have assessed their toxic effects when present together. We demonstrate that parameters that impact toxicity include species and cell type, relative concentration, exposure time and administration methods, and we highlight additional research required to further elucidate mechanisms of action and mitigation strategies.
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Affiliation(s)
- Asmita Thapa
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland;
| | | | - Blánaid White
- School of Chemical Sciences, National Centre for Sensor Research, DCU Water Institute, Dublin City University, Dublin 9, Ireland
- Correspondence: (B.W.); (D.W.); Tel.: +353-01-7006731 (B.W.); +353-01-7005600 (D.W.)
| | - Dermot Walls
- School of Biotechnology, National Centre for Sensor Research, Dublin City University, Dublin 9, Ireland
- Correspondence: (B.W.); (D.W.); Tel.: +353-01-7006731 (B.W.); +353-01-7005600 (D.W.)
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7
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Dmitriev SE, Vladimirov DO, Lashkevich KA. A Quick Guide to Small-Molecule Inhibitors of Eukaryotic Protein Synthesis. BIOCHEMISTRY (MOSCOW) 2021; 85:1389-1421. [PMID: 33280581 PMCID: PMC7689648 DOI: 10.1134/s0006297920110097] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Eukaryotic ribosome and cap-dependent translation are attractive targets in the antitumor, antiviral, anti-inflammatory, and antiparasitic therapies. Currently, a broad array of small-molecule drugs is known that specifically inhibit protein synthesis in eukaryotic cells. Many of them are well-studied ribosome-targeting antibiotics that block translocation, the peptidyl transferase center or the polypeptide exit tunnel, modulate the binding of translation machinery components to the ribosome, and induce miscoding, premature termination or stop codon readthrough. Such inhibitors are widely used as anticancer, anthelmintic and antifungal agents in medicine, as well as fungicides in agriculture. Chemicals that affect the accuracy of stop codon recognition are promising drugs for the nonsense suppression therapy of hereditary diseases and restoration of tumor suppressor function in cancer cells. Other compounds inhibit aminoacyl-tRNA synthetases, translation factors, and components of translation-associated signaling pathways, including mTOR kinase. Some of them have antidepressant, immunosuppressive and geroprotective properties. Translation inhibitors are also used in research for gene expression analysis by ribosome profiling, as well as in cell culture techniques. In this article, we review well-studied and less known inhibitors of eukaryotic protein synthesis (with the exception of mitochondrial and plastid translation) classified by their targets and briefly describe the action mechanisms of these compounds. We also present a continuously updated database (http://eupsic.belozersky.msu.ru/) that currently contains information on 370 inhibitors of eukaryotic protein synthesis.
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Affiliation(s)
- S E Dmitriev
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119234, Russia. .,Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Moscow, 119234, Russia.,Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991, Russia
| | - D O Vladimirov
- Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Moscow, 119234, Russia
| | - K A Lashkevich
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119234, Russia
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8
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Xu H, Wang L, Sun J, Wang L, Guo H, Ye Y, Sun X. Microbial detoxification of mycotoxins in food and feed. Crit Rev Food Sci Nutr 2021; 62:4951-4969. [PMID: 33663294 DOI: 10.1080/10408398.2021.1879730] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Mycotoxins are metabolites produced by fungi growing in food or feed, which can produce toxic effects and seriously threaten the health of humans and animals. Mycotoxins are commonly found in food and feed, and are of significant concern due to their hepatotoxicity, nephrotoxicity, carcinogenicity, mutagenicity, and ability to damage the immune and reproductive systems. Traditional physical and chemical detoxification methods to treat mycotoxins in food and feed products have limitations, such as loss of nutrients, reagent residues, and secondary pollution to the environment. Thus, there is an urgent need for new detoxification methods to effectively control mycotoxins and treat mycotoxin pollution. In recent years, microbial detoxification technology has been widely used for the degradation of mycotoxins in food and feed because this approach offers the potential for treatment with high efficiency, low toxicity, and strong specificity, without damage to nutrients. This article reviews the application of microbial detoxification technology for removal of common mycotoxins such as Aflatoxin, Ochratoxin, Zearalenone, Deoxynivalenol, and Fumonisins, and discusses the development trend of this important technology.
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Affiliation(s)
- Hongwen Xu
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu, P.R. China
| | - Liangzhe Wang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu, P.R. China
| | - Jiadi Sun
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu, P.R. China
| | - Liping Wang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu, P.R. China
| | - Hongyan Guo
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu, P.R. China
| | - Yongli Ye
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu, P.R. China
| | - Xiulan Sun
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu, P.R. China
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9
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Wang W, Zhu Y, Abraham N, Li XZ, Kimber M, Zhou T. The Ribosome-Binding Mode of Trichothecene Mycotoxins Rationalizes Their Structure-Activity Relationships. Int J Mol Sci 2021; 22:1604. [PMID: 33562610 PMCID: PMC7914836 DOI: 10.3390/ijms22041604] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/29/2021] [Accepted: 02/01/2021] [Indexed: 02/06/2023] Open
Abstract
Trichothecenes are the most prevalent mycotoxins contaminating cereal grains. Some of them are also considered as the virulence factors of Fusarium head blight disease. However, the mechanism behind the structure-activity relationship for trichothecenes remains unexplained. Filling this information gap is a crucial step for developing strategies to manage this large family of mycotoxins in food and feed. Here, we perform an in-depth re-examination of the existing structures of Saccharomyces cerevisiae ribosome complexed with three different trichothecenes. Multiple binding interactions between trichothecenes and 25S rRNA, including hydrogen bonds, nonpolar pi stacking interactions and metal ion coordination interactions, are identified as important binding determinants. These interactions are mainly contributed by the key structural elements to the toxicity of trichothecenes, including the oxygen in the 12,13-epoxide ring and a double bond between C9 and C10. In addition, the C3-OH group also participates in binding. The comparison of three trichothecenes binding to the ribosome, along with their binding pocket architecture, suggests that the substitutions at different positions impact trichothecenes binding in two different patterns. Moreover, the binding of trichothecenes induced conformation changes of several nucleotide bases in 25S rRNA. This then provides a structural framework for understanding the structure-activity relationships apparent in trichothecenes. This study will facilitate the development of strategies aimed at detoxifying mycotoxins in food and feed and at improving the resistance of cereal crops to Fusarium fungal diseases.
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Affiliation(s)
- Weijun Wang
- Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON N1G 5C9, Canada; (W.W.); (Y.Z.); (N.A.); (X.-Z.L.)
| | - Yan Zhu
- Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON N1G 5C9, Canada; (W.W.); (Y.Z.); (N.A.); (X.-Z.L.)
| | - Nadine Abraham
- Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON N1G 5C9, Canada; (W.W.); (Y.Z.); (N.A.); (X.-Z.L.)
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON N1G 2W1, Canada;
| | - Xiu-Zhen Li
- Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON N1G 5C9, Canada; (W.W.); (Y.Z.); (N.A.); (X.-Z.L.)
| | - Matthew Kimber
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON N1G 2W1, Canada;
| | - Ting Zhou
- Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON N1G 5C9, Canada; (W.W.); (Y.Z.); (N.A.); (X.-Z.L.)
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10
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Deoxynivalenol degradation in wheat kernels by exposition to ammonia vapours: A tentative strategy for detoxification. Food Control 2020. [DOI: 10.1016/j.foodcont.2020.107444] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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11
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Liu JT, Pham PH, Wootton SK, Bols NC, Lumsden JS. VHSV IVb infection and autophagy modulation in the rainbow trout gill epithelial cell line RTgill-W1. JOURNAL OF FISH DISEASES 2020; 43:1237-1247. [PMID: 32794227 DOI: 10.1111/jfd.13227] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/23/2020] [Accepted: 06/24/2020] [Indexed: 06/11/2023]
Abstract
Autophagy modulation influences the success of intracellular pathogens, and an understanding of the mechanisms involved might offer practical options to reduce the impact of infectious disease. Viral haemorrhagic septicaemia virus (VHSV) can cause high mortality and economic loss in some commercial fish species. VHSV IVb was used to infect a rainbow trout gill cell line, RTgill-W1, followed by the treatment of the cells with different autophagy-modulating reagents. LC3II protein using Western blot was significantly (p < .05) decreased for two days following VHSV infection, and immunofluorescence confirmed that LC3II-positive intracytoplasmic puncta were also decreased. Infection with VHSV resulted in significantly decreased expression of the autophagy-related (Atg) genes atg4, at12, atg13 and becn1 after one day using quantitative PCR. Both viral gene copy number and VHSV N protein were significantly decreased by treating the cells with autophagy-blocking (chloroquine) and autophagy-inhibiting reagents (deoxynivalenol and 3-methyladenine) after three days, while autophagy induction (restricted nutrition and rapamycin) had limited effect. Only treatment of RTgill-W1 with deoxynivalenol resulted in a significant increase in expression of type I interferon. Therefore, the suppression of autophagy initially occurs after VHSV IVb infection, but the modulation of autophagy can also inhibit VHSV IVb infection in RTgill-W1 after three days.
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Affiliation(s)
- Juan-Ting Liu
- Department of Pathobiology, University of Guelph, Guelph, ON, Canada
| | - Phuc H Pham
- Department of Pathobiology, University of Guelph, Guelph, ON, Canada
| | - Sarah K Wootton
- Department of Pathobiology, University of Guelph, Guelph, ON, Canada
| | - Niels C Bols
- Department of Biology, University of Waterloo, Waterloo, ON, Canada
| | - John S Lumsden
- Department of Pathobiology, University of Guelph, Guelph, ON, Canada
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12
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Pharmacological and nutritional modulation of autophagy in a rainbow trout (Oncorhynchus mykiss) gill cell line, RTgill-W1. In Vitro Cell Dev Biol Anim 2020; 56:659-669. [PMID: 32901427 DOI: 10.1007/s11626-020-00490-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 08/06/2020] [Indexed: 12/12/2022]
Abstract
Autophagy is involved in the modulation of nutrition, immunity, and disease in humans and animals. To understand the impact of autophagy modulation on a rainbow trout gill cell line, RTgill-W1, treatments including reduced nutrition (2% fetal bovine serum compared with 10% control), rapamycin, 3-methyladenine, deoxynivalenol, and chloroquine were tested. Western blot and immunofluorescence were used to detect microtubule-associated protein 1A/1B-light chain protein and quantitative polymerase chain reaction was used to detect the expression of 10 autophagy-related genes. At 3-d post-treatment, reduced nutrition significantly (p < 0.05) increased autophagy while deoxynivalenol significantly (p < 0.01) suppressed it compared to controls. These phenomena were confirmed by using immunofluorescence to detect the number of autophagosomes in RTgill-W1. Chloroquine is critical to allow observation of microtubule-associated protein 1A/1B-light chain protein in this model. The commonly used autophagy-modulating chemicals rapamycin and 3-methyladenine either activated or suppressed microtubule-associated protein 1A/1B-light chain protein, respectively, as expected from the literature, but did not act in a consistently significant manner. Expression of five of the 10 Atg genes, including lc3, gabarap, atg4, atg7, and atg12, were altered in a similar pattern to microtubule-associated protein 1A/1B-light chain protein. The consistent trend of autophagy-related gene upregulation including becn1, lc3, gabarap, and atg9 following treatment with 3-methyladenine and chloroquine is suggestive of a novel feedback regulation in the autophagy machinery.
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Park SH, Moon Y. Enterocyte-Based Bioassay via Quantitative Combination of Proinflammatory Sentinels Specific to 8-keto-trichothecenes. Front Immunol 2020; 11:1530. [PMID: 32765531 PMCID: PMC7378738 DOI: 10.3389/fimmu.2020.01530] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 06/10/2020] [Indexed: 12/12/2022] Open
Abstract
Type B 8-keto-trichothecenes are muco-active mycotoxins that exist as inevitable contaminants in cereal-based foodstuffs. Gut-associated inflammation is an early frontline response during human and animal exposure to these mycotoxins. Despite various tools for chemical identification, optimized biomonitoring of sentinel response-associated biomarkers is required to assess the specific proinflammatory actions of 8-keto-trichothecenes in the gut epithelial barrier. In the present study, intoxication with 8-keto-trichothecenes in human intestinal epithelial cells was found to trigger early response gene 1 product (EGR-1) that plays crucial roles in proinflammatory chemokine induction. In contrast, epithelial exposure to 8-keto-trichothecenes resulted in downregulated expression of nuclear factor NF-kappa-B p65 protein, a key transcription factor, during general inflammatory responses in the gut. Based on the early molecular patterns of expression, the inflammation-inducing activity of 8-keto-trichothecenes was quantified using intestinal epithelial cells with dual reporters for EGR-1 and p65 proteins. EGR-1-responsive elements were linked to luciferase reporter while p65 promoter was bound to secretory alkaline phosphatase (SEAP) reporter. In response to conventional inflammagens such as endotoxins and cytokines such as TNF-α, both luciferase and SEAP activity were elevated in a dose-dependent manner. However, as expected from the mechanistic evaluation, 8-keto-trichothecene-exposed dual reporters of luciferase and SEAP displayed contrasting expression patterns. Furthermore, 8-keto-trichothecene-elevated EGR-1-responsive luciferase activity was improved by deficiency of PSMA3, an α-type subunit of the 20S proteasome core complex for ubiquitin-dependent EGR-1 degradation. This molecular event-based dual biomonitoring in epithelial cells is a promising supplementary tool for detecting typical molecular inflammatory pathways in response to 8-keto-trichothecenes in the food matrix.
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Affiliation(s)
- Seong-Hwan Park
- Laboratory of Mucosal Exposome and Biomodulation, Department of Biomedical Sciences, Pusan National University, Yangsan, South Korea
| | - Yuseok Moon
- Laboratory of Mucosal Exposome and Biomodulation, Department of Biomedical Sciences, Pusan National University, Yangsan, South Korea.,Biomedical Research Institute, Pusan National University, Yangsan, South Korea
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14
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Rissato DF, de Santi Rampazzo AP, Borges SC, Sousa FC, Busso C, Buttow NC, Natali MRM. Chronic ingestion of deoxynivalenol-contaminated diet dose-dependently decreases the area of myenteric neurons and gliocytes of rats. Neurogastroenterol Motil 2020; 32:e13770. [PMID: 31793155 DOI: 10.1111/nmo.13770] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 10/18/2019] [Accepted: 11/10/2019] [Indexed: 02/08/2023]
Abstract
BACKGROUND Deoxynivalenol (DON), a mycotoxin produced by Fusarium spp., is commonly found in cereals ingested by humans and animals. Its ingestion is correlated with hepatic, hematologic, renal, splenic, cardiac, gastrointestinal, and neural damages, according to dose, duration of exposure and species. In this work, the effects of the ingestion of DON-contaminated diet at concentrations considered tolerable for human and animal intake were assessed. METHODS Male Wistar rats aging 21 days were allotted to five groups that were given, for 42 days, diets contaminated with different concentrations of DON (0, 0.2, 0.75, 1.75, and 2 mg kg-1 of chow). Food ingestion, bodyweight, oxidative status and morphometric analyses of gliocytes, and neurons of jejunal myenteric ganglia were recorded. KEY RESULTS At these concentrations, there was no food rejection, decrease in bodyweight gain, changes in oxidative status, or loss of either neurons or gliocytes. However, DON decreased gliocyte area, general neuronal population, nitrergic, cholinergic and NADH-diaphorase positive subpopulations and, as a result, ganglion area. CONCLUSIONS & INFERENCES It was concluded that, even in the absence of visible effect, DON exposure reduces cell body area of gliocytes and neurons of the myenteric plexus of the rat jejunum.
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Affiliation(s)
- Débora Furlan Rissato
- Ingá University Center, Maringá, Paraná, Brazil.,Department of Morphological Sciences, State University of Maringá, Maringá, Paraná, Brazil
| | | | | | - Fernando Carlos Sousa
- Coordination of Biological Sciences, Federal University of Technology - Paraná, Dois Vizinhos Campus, Dois Vizinhos, Paraná, Brazil
| | - Cleverson Busso
- Coordination of Biological Sciences, Federal University of Technology - Paraná, Dois Vizinhos Campus, Dois Vizinhos, Paraná, Brazil
| | - Nilza Cristina Buttow
- Department of Morphological Sciences, State University of Maringá, Maringá, Paraná, Brazil
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15
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Xie MY, Chen T, Xi QY, Hou LJ, Luo JY, Zeng B, Li M, Sun JJ, Zhang YL. Porcine milk exosome miRNAs protect intestinal epithelial cells against deoxynivalenol-induced damage. Biochem Pharmacol 2020; 175:113898. [PMID: 32145262 DOI: 10.1016/j.bcp.2020.113898] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Accepted: 03/02/2020] [Indexed: 12/18/2022]
Abstract
Porcine milk exosomes play an important role in mother-infant communication. Deoxynivalenol (DON) is a toxin which causes serious damage to the animal intestinal mucosa. Our previous study showed porcine milk exosomes facilitate mice intestine development, but the effects of these exosomes to antagonize DON toxicity is unclear. Our in vivo results showed that milk exosomes attenuated DON-induced damage on the mouse body weight and intestinal epithelium growth. In addition, these exosomes could reverse DON-induced inhibition on cell proliferation and tight junction proteins (TJs) formation and reduce DON-induced cell apoptosis. In vitro, exosomes up-regulated the expression of miR-181a, miR-30c, miR-365-5p and miR-769-3p in IPEC-J2 cells and then down-regulated the expression of their targeting genes in p53 pathway, ultimately attenuating DON-induced damage by promoting cell proliferation and TJs and by inhibiting cell apoptosis. In conclusion, porcine milk exosomes could protect the intestine against DON damage, and these protections may take place through the miRNAs in exosomes. These results indicated that the addition of miRNA-enriched exosomes to feed or food could be used as a novel preventative measure for necrotizing enterocolitis.
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Affiliation(s)
- Mei-Ying Xie
- College of Animal Science, South China Agricultural University, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China; Collaborative Innovation Center of Plant Pest Management and Bioenvironmental Health Application Technology, Guangdong Eco-Engineering Polytechnic, 297 Guangshan First Road, Tianhe District, Guangzhou, Guangdong 510520, China; Guangdong Province Key Laboratory of Animal Nutritional Regulation, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China
| | - Ting Chen
- College of Animal Science, South China Agricultural University, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China; Guangdong Province Key Laboratory of Animal Nutritional Regulation, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China; National Engineering Research Center for Breeding Swine Industry, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China; Guangdong Engineering&Research Center for Woody Fodder Plants, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China
| | - Qian-Yun Xi
- College of Animal Science, South China Agricultural University, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China; Guangdong Province Key Laboratory of Animal Nutritional Regulation, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China; National Engineering Research Center for Breeding Swine Industry, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China; Guangdong Engineering&Research Center for Woody Fodder Plants, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China
| | - Lian-Jie Hou
- College of Animal Science, South China Agricultural University, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China
| | - Jun-Yi Luo
- College of Animal Science, South China Agricultural University, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China; Guangdong Province Key Laboratory of Animal Nutritional Regulation, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China
| | - Bin Zeng
- College of Animal Science, South China Agricultural University, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China; Guangdong Province Key Laboratory of Animal Nutritional Regulation, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China
| | - Meng Li
- College of Animal Science, South China Agricultural University, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China; Guangdong Province Key Laboratory of Animal Nutritional Regulation, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China
| | - Jia-Jie Sun
- College of Animal Science, South China Agricultural University, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China; Guangdong Province Key Laboratory of Animal Nutritional Regulation, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China; National Engineering Research Center for Breeding Swine Industry, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China; Guangdong Engineering&Research Center for Woody Fodder Plants, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China.
| | - Yong-Liang Zhang
- College of Animal Science, South China Agricultural University, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China; Guangdong Province Key Laboratory of Animal Nutritional Regulation, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China; National Engineering Research Center for Breeding Swine Industry, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China; Guangdong Engineering&Research Center for Woody Fodder Plants, 483 Wushan Road, Tianhe District, Guangzhou, Guangdong 510642, China.
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Foroud NA, Baines D, Gagkaeva TY, Thakor N, Badea A, Steiner B, Bürstmayr M, Bürstmayr H. Trichothecenes in Cereal Grains - An Update. Toxins (Basel) 2019; 11:E634. [PMID: 31683661 PMCID: PMC6891312 DOI: 10.3390/toxins11110634] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 10/25/2019] [Accepted: 10/29/2019] [Indexed: 01/01/2023] Open
Abstract
Trichothecenes are sesquiterpenoid mycotoxins produced by fungi from the order Hypocreales, including members of the Fusarium genus that infect cereal grain crops. Different trichothecene-producing Fusarium species and strains have different trichothecene chemotypes belonging to the Type A and B class. These fungi cause a disease of small grain cereals, called Fusarium head blight, and their toxins contaminate host tissues. As potent inhibitors of eukaryotic protein synthesis, trichothecenes pose a health risk to human and animal consumers of infected cereal grains. In 2009, Foroud and Eudes published a review of trichothecenes in cereal grains for human consumption. As an update to this review, the work herein provides a comprehensive and multi-disciplinary review of the Fusarium trichothecenes covering topics in chemistry and biochemistry, pathogen biology, trichothecene toxicity, molecular mechanisms of resistance or detoxification, genetics of resistance and breeding strategies to reduce their contamination of wheat and barley.
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Affiliation(s)
- Nora A Foroud
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB T1J 4B1, Canada.
| | - Danica Baines
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB T1J 4B1, Canada.
| | - Tatiana Y Gagkaeva
- Laboratory of Mycology and Phytopathology, All-Russian Institute of Plant Protection (VIZR), St. Petersburg, Pushkin 196608, Russia.
| | - Nehal Thakor
- Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada.
| | - Ana Badea
- Brandon Research and Development Centre, Agriculture and Agri-Food Canada, Brandon, MB R7A 5Y3, Canada.
| | - Barbara Steiner
- Department of Agrobiotechnology (IFA-Tulln), Institute of Biotechnology in Plant Production, University of Natural Resources and Life Sciences, Vienna (BOKU), Tulln 3430, Austria.
| | - Maria Bürstmayr
- Department of Agrobiotechnology (IFA-Tulln), Institute of Biotechnology in Plant Production, University of Natural Resources and Life Sciences, Vienna (BOKU), Tulln 3430, Austria.
| | - Hermann Bürstmayr
- Department of Agrobiotechnology (IFA-Tulln), Institute of Biotechnology in Plant Production, University of Natural Resources and Life Sciences, Vienna (BOKU), Tulln 3430, Austria.
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Exposure of pregnant sows to deoxynivalenol during 35-70 days of gestation does not affect pathomorphological and immunohistochemical properties of fetal organs. Mycotoxin Res 2017; 34:99-106. [PMID: 29288371 DOI: 10.1007/s12550-017-0304-z] [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: 12/02/2016] [Revised: 12/10/2017] [Accepted: 12/13/2017] [Indexed: 10/18/2022]
Abstract
In order to evaluate the influence of deoxynivalenol (DON) on histomorphological and immunohistochemical parameters in the development of porcine fetuses, five pregnant sows were fed a control diet (0.15 mg DON/kg diet) and seven sows a contaminated diet (4.42 mg DON/kg diet) between days 35 and 70 of gestation. On day 70, fetuses were delivered by caesarean section and sows and fetuses were euthanized. Tissue samples of three fetuses from each sow were collected, fixed in formalin, and processed routinely for light microscopy and immunohistochemistry. At necropsy, no macroscopic lesions were observed in any organ of the fetuses. Histomorphological, immunohistochemical, and morphometrical parameters of the immune system, liver, and intestinal tract were examined. The following antibodies were used in the liver, spleen, lymph nodes, thymus, gut, and bone marrow to compare control- and DON-treated animals: (I) CD3 and CD79a (T and B lymphocytes differentiation); (II) myeloid/histiocyte antigen 387 (MAC) (identification of macrophages); (III) Ki-67 Antigen (Ki-67) (proliferation marker); (IV) p-p-38 mitogen-activated protein kinases (p-p38 MAPK) as well as caspase-3 (cas3) and caspase-9 (cas9) (enzymes of apoptosis cascade); (V) tumor necrosis factor-alpha (TNFα) (immune-related protein). The results of the study show that exposure of pregnant sows with DON between gestation days 35 and 70 causes no pathomorphologically or immunohistochemically detectable alterations in all fetal organs examined.
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18
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Kim SH, Vujanovic V. Biodegradation and biodetoxification of Fusarium mycotoxins by Sphaerodes mycoparasitica. AMB Express 2017; 7:145. [PMID: 28687037 PMCID: PMC5500597 DOI: 10.1186/s13568-017-0446-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 06/28/2017] [Indexed: 11/10/2022] Open
Abstract
A fungus Sphaerodes mycoparasitica SMCD 2220-01 is a host specific mycoparasite against plant pathogenic Fusarium species. Fusarium spp. are producing a plethora of mycotoxins including zearalenone (ZEN), deoxynivalenol (DON) and its acetylated derivatives, 3-acetyl-deoxynivalenol (3-ADON) and 15-acetyl-deoxynivalenol (15-ADON). The SMCD 2220-01 strain substantially reduced DON, 3-ADON, 15-ADON, and ZEN production capacity in co-culture system. Degradation and detoxification of the pure mycotoxins were also achieved when exposed to SMCD 2220-01 in shake flasks. The thin layer chromatography (TLC) combined with high performance liquid chromatography-electrospray ionization-high resolution mass spectrometry (HPLC-ESI-HRMS) revealed that the amount of mycotoxins exposed to SMCD 2220-01 was considerably reduced compared to control. ZEN level was decreased by 97%, while zearalenone sulfate ([M-H+SO3]- at m/z 397.1052 C18H21O8S1) was detected as a metabolite of ZEN converted to less toxic molecule by the mycoparasite. Further, the mycoparasite appeared to degrade DON, 3-ADON, and 15-ADON by 89, 58, and 72%, respectively. The deoxynivalenol sulfate ([M-COCH3+SO3-CH2O]- at m/z 345.2300 C14H17O8S1) was detected as a less toxic metabolic product of DON and 3-ADON. These findings report the SMCD 2220-01 effectiveness to lower mycotoxins-producing capacities of Fusarium, degrade pure mycotoxins and transform them to less toxic metabolites, opening new opportunities for research and innovation for detoxification of mycotoxins.
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19
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Brown NA, Evans J, Mead A, Hammond‐Kosack KE. A spatial temporal analysis of the Fusarium graminearum transcriptome during symptomless and symptomatic wheat infection. MOLECULAR PLANT PATHOLOGY 2017; 18:1295-1312. [PMID: 28466509 PMCID: PMC5697668 DOI: 10.1111/mpp.12564] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 04/10/2017] [Accepted: 04/24/2017] [Indexed: 05/20/2023]
Abstract
Fusarium head blight of wheat is one of the most serious and hazardous crop diseases worldwide. Here, a transcriptomic investigation of Fusarium graminearum reveals a new model for symptomless and symptomatic wheat infection. The predicted metabolic state and secretome of F. graminearum were distinct within symptomless and symptomatic wheat tissues. Transcripts for genes involved in the biosynthesis of the mycotoxin, deoxynivalenol, plus other characterized and putative secondary metabolite clusters increased in abundance in symptomless tissue. Transcripts encoding for genes of distinct groups of putative secreted effectors increased within either symptomless or symptomatic tissue. Numerous pathogenicity-associated gene transcripts and transcripts representing PHI-base mutations that impacted on virulence increased in symptomless tissue. In contrast, hydrolytic carbohydrate-active enzyme (CAZyme) and lipase gene transcripts exhibited a different pattern of expression, resulting in elevated transcript abundance during the development of disease symptoms. Genome-wide comparisons with existing datasets confirmed that, within the wheat floral tissue, at a single time point, different phases of infection co-exist, which are spatially separated and reminiscent of both early and late infection. This study provides novel insights into the combined spatial temporal coordination of functionally characterized and hypothesized virulence strategies.
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Affiliation(s)
- Neil A. Brown
- Department of Biointeractions and Crop ProtectionRothamsted ResearchHarpenden, Hertfordshire AL5 2JQ, UK
| | - Jess Evans
- Computational and Analytical SciencesRothamsted ResearchHarpenden, Hertfordshire AL5 2JQ, UK
| | - Andrew Mead
- Computational and Analytical SciencesRothamsted ResearchHarpenden, Hertfordshire AL5 2JQ, UK
| | - Kim E. Hammond‐Kosack
- Department of Biointeractions and Crop ProtectionRothamsted ResearchHarpenden, Hertfordshire AL5 2JQ, UK
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20
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Effects of deoxynivalenol (DON) and its microbial biotransformation product deepoxy-deoxynivalenol (DOM-1) on a trout, pig, mouse, and human cell line. Mycotoxin Res 2017; 33:297-308. [PMID: 28741250 PMCID: PMC5644741 DOI: 10.1007/s12550-017-0289-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 07/13/2017] [Accepted: 07/14/2017] [Indexed: 01/14/2023]
Abstract
Deoxynivalenol (DON), a trichothecene produced by various Fusarium species, is one of the most prevalent food- and feed-associated mycotoxins. The effects of DON and deepoxy-deoxynivalenol (DOM-1) were assessed in five different cell lines from different tissues and species starting from the first line of defense, the trout gill (RTgill-W1) and pig intestinal cells (IPEC-1 and IPEC-J2) over immune cells, as second line of defense (mouse macrophages RAW 264.7) to human liver cells (HepG2). Viability was assessed with a WST-1 assay, except for RTgill-W1, where a neutral red (NR) and sulforhodamine B (SRB) assay was performed. Additionally, more sensitive parameters, such as interleukin-, nitric oxide (NO)-, and albumin-release were determined. Viability was affected by DON at concentrations starting at 10 μmol/L (RTgill-W1), 0.9 μmol/L (IPEC-1), 3.5 μmol/L (IPEC-J2), and 0.9 μmol/L (HepG2), whereas DOM-1 did not have such an effect. Additionally, NO was decreased (0.84 μmol/L DON), whereas interleukin (IL)-6 was increased (0.42 μmol/L DON) in lipopolysaccharide (LPS)-stimulated DON-, but not DOM-1-treated RAW cells. Tumor necrosis factor (TNF)-α release, however, was not affected. Interestingly, albumin secretion of HepG2 cells was decreased by both DON and DOM-1 but at a much higher concentration for DOM-1 (228 versus 0.9 μmol/L for DON). 98.9% of DOM-1 was retrieved by liquid chromatography tandem mass spectrometry at the end of the experiment, proving its stability. In this study, IL-6 was the most sensitive parameter, followed by NO and albumin release and viability for HepG2 and IPEC-1.
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Vanhoutte I, De Mets L, De Boevre M, Uka V, Di Mavungu JD, De Saeger S, De Gelder L, Audenaert K. Microbial Detoxification of Deoxynivalenol (DON), Assessed via a Lemna minor L. Bioassay, through Biotransformation to 3-epi-DON and 3-epi-DOM-1. Toxins (Basel) 2017; 9:toxins9020063. [PMID: 28208799 PMCID: PMC5331442 DOI: 10.3390/toxins9020063] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 01/31/2017] [Accepted: 02/04/2017] [Indexed: 01/30/2023] Open
Abstract
Mycotoxins are toxic metabolites produced by fungi. To mitigate mycotoxins in food or feed, biotransformation is an emerging technology in which microorganisms degrade toxins into non-toxic metabolites. To monitor deoxynivalenol (DON) biotransformation, analytical tools such as ELISA and liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) are typically used. However, these techniques do not give a decisive answer about the remaining toxicity of possible biotransformation products. Hence, a bioassay using Lemna minor L. was developed. A dose-response analysis revealed significant inhibition in the growth of L. minor exposed to DON concentrations of 0.25 mg/L and higher. Concentrations above 1 mg/L were lethal for the plant. This bioassay is far more sensitive than previously described systems. The bioassay was implemented to screen microbial enrichment cultures, originating from rumen fluid, soil, digestate and activated sludge, on their biotransformation and detoxification capability of DON. The enrichment cultures originating from soil and activated sludge were capable of detoxifying and degrading 5 and 50 mg/L DON. In addition, the metabolites 3-epi-DON and the epimer of de-epoxy-DON (3-epi-DOM-1) were found as biotransformation products of both consortia. Our work provides a new valuable tool to screen microbial cultures for their detoxification capacity.
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Affiliation(s)
- Ilse Vanhoutte
- Laboratory of Environmental Biotechnology, Department of Applied Biosciences, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium.
| | - Laura De Mets
- Laboratory of Environmental Biotechnology, Department of Applied Biosciences, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium.
| | - Marthe De Boevre
- Laboratory of Food Analysis, Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, 9000 Ghent, Belgium.
| | - Valdet Uka
- Laboratory of Food Analysis, Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, 9000 Ghent, Belgium.
| | - José Diana Di Mavungu
- Laboratory of Food Analysis, Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, 9000 Ghent, Belgium.
| | - Sarah De Saeger
- Laboratory of Food Analysis, Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, 9000 Ghent, Belgium.
| | - Leen De Gelder
- Laboratory of Environmental Biotechnology, Department of Applied Biosciences, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium.
| | - Kris Audenaert
- Laboratory of Applied Mycology and Phenomics, Department of Applied Biosciences, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium.
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Foroud NA, Shank RA, Kiss D, Eudes F, Hazendonk P. Solvent and Water Mediated Structural Variations in Deoxynivalenol and Their Potential Implications on the Disruption of Ribosomal Function. Front Microbiol 2016; 7:1239. [PMID: 27582730 PMCID: PMC4987352 DOI: 10.3389/fmicb.2016.01239] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Accepted: 07/25/2016] [Indexed: 12/25/2022] Open
Abstract
Fusarium head blight (FHB) is a disease of cereal crops caused by trichothecene producing Fusarium species. Trichothecenes, macrocylicic fungal metabolites composed of three fused rings (A-C) with one epoxide functionality, are a class of mycotoxins known to inhibit protein synthesis in eukaryotic ribosomes. These toxins accumulate in the kernels of infected plants rendering them unsuitable for human and animal consumption. Among the four classes of trichothecenes (A-D) A and B are associated with FHB, where the type B trichothecene deoxynivalenol (DON) is most relevant. While it is known that these toxins inhibit protein synthesis by disrupting peptidyl transferase activity, the exact mechanism of this inhibition is poorly understood. The three-dimensional structures and H-bonding behavior of DON were evaluated using one- and two-dimensional nuclear magnetic resonance (NMR) spectroscopy techniques. Comparisons of the NMR structure presented here with the recently reported crystal structure of DON bound in the yeast ribosome reveal insights into the possible toxicity mechanism of this compound. The work described herein identifies a water binding pocket in the core structure of DON, where the 3OH plays an important role in this interaction. These results provide preliminary insights into how substitution at C3 reduces trichothecene toxicity. Further investigations along these lines will provide opportunities to develop trichothecene remediation strategies based on the disruption of water binding interactions with 3OH.
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Affiliation(s)
- Nora A. Foroud
- Lethbridge Research and Development Centre, Agriculture and Agri-Food CanadaLethbridge, AB, Canada
| | - Roxanne A. Shank
- Department of Chemistry and Biochemistry, University of LethbridgeLethbridge, AB, Canada
| | - Douglas Kiss
- Department of Chemistry and Biochemistry, University of LethbridgeLethbridge, AB, Canada
| | - François Eudes
- Department of Chemistry and Biochemistry, University of LethbridgeLethbridge, AB, Canada
| | - Paul Hazendonk
- Lethbridge Research and Development Centre, Agriculture and Agri-Food CanadaLethbridge, AB, Canada
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Zhao L, Li X, Ji C, Rong X, Liu S, Zhang J, Ma Q. Protective effect of Devosia sp. ANSB714 on growth performance, serum chemistry, immunity function and residues in kidneys of mice exposed to deoxynivalenol. Food Chem Toxicol 2016; 92:143-9. [DOI: 10.1016/j.fct.2016.03.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Revised: 03/15/2016] [Accepted: 03/18/2016] [Indexed: 01/19/2023]
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24
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Relationship between mycoparasites lifestyles and biocontrol behaviors against Fusarium spp. and mycotoxins production. Appl Microbiol Biotechnol 2016; 100:5257-72. [PMID: 27121573 DOI: 10.1007/s00253-016-7539-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 04/05/2016] [Accepted: 04/07/2016] [Indexed: 12/11/2022]
Abstract
Global food security research is seeking eco-friendly solutions to control mycotoxins in grain infected by fungi (molds). In particular, mycotoxigenic Fusarium spp. outbreak is a chronic threat for cereal grain production, human, and animal health. In this review paper, we discuss up-to-date biological control strategies in applying mycoparasites as biological control agents (BCA) to prevent plant diseases in crops and mycotoxins in grain, food, and feed. The aim is to increase food safety and to minimize economic losses due to the reduced grain yield and quality. However, recent papers indicate that the study of the BCA specialists with biotrophic lifestyle lags behind our understanding of the BCA generalists with necrotrophic lifestyle. We examine critical behavioral traits of the two BCA groups of mycoparasites. The goal is to highlight their major characteristics in the context of future research towards an efficient biocontrol strategy against mycotoxin-producing Fusarium species. The emphasis is put on biocontrol of Fusarium graminearum, F. avenaceum, and F. culmorum causing Fusarium head blight (FHB) in cereals and their mycotoxins.
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25
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Vanhoutte I, Audenaert K, De Gelder L. Biodegradation of Mycotoxins: Tales from Known and Unexplored Worlds. Front Microbiol 2016; 7:561. [PMID: 27199907 PMCID: PMC4843849 DOI: 10.3389/fmicb.2016.00561] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 04/04/2016] [Indexed: 12/24/2022] Open
Abstract
Exposure to mycotoxins, secondary metabolites produced by fungi, may infer serious risks for animal and human health and lead to economic losses. Several approaches to reduce these mycotoxins have been investigated such as chemical removal, physical binding, or microbial degradation. This review focuses on the microbial degradation or transformation of mycotoxins, with specific attention to the actual detoxification mechanisms of the mother compound. Furthermore, based on the similarities in chemical structure between groups of mycotoxins and environmentally recalcitrant compounds, known biodegradation pathways and degrading organisms which hold promise for the degradation of mycotoxins are presented.
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Affiliation(s)
| | | | - Leen De Gelder
- Department of Applied BioSciences, Faculty Bioscience Engineering, Ghent UniversityGhent, Belgium
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26
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Gu MJ, Song SK, Lee IK, Ko S, Han SE, Bae S, Ji SY, Park BC, Song KD, Lee HK, Han SH, Yun CH. Barrier protection via Toll-like receptor 2 signaling in porcine intestinal epithelial cells damaged by deoxynivalnol. Vet Res 2016; 47:25. [PMID: 26857454 PMCID: PMC4746821 DOI: 10.1186/s13567-016-0309-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Accepted: 01/05/2016] [Indexed: 12/29/2022] Open
Abstract
Intestinal barrier is the first line of defense inside the body and comprises intercellular tight junction (TJ) proteins that regulate paracellular permeability. Deoxynivalenol (DON), a fungal metabolite often found in the contaminated food of domestic animals, is known to impair intestinal barrier function and may be involved in intestinal inflammation. Unlike in humans and mice, the importance of Toll-like receptor (TLR) 2 expressed in porcine intestinal epithelial cells is largely unclear. Therefore, the aim of the present study was to investigate whether TLR2 stimulation enhances intestinal barrier function and protects against DON exposure. We found that the cells treated with TLR2 ligands decreased the epithelial barrier permeability and enhanced TJ protein expression in intestinal porcine epithelial cells (IPEC-J2). In addition, pretreatment with TLR2 ligand, including Pam3CSK4 (PCSK) and lipoteichoic acid from Bacillus subtilis, prevented DON-induced barrier dysfunction by increasing the expression of TJ proteins via the PI3K-Akt-dependent pathway. It is likely that the DON-disrupted intestinal barrier caused biological changes of immune cells in the lamina propria. Thus, we conducted co-culture of differentiated IPEC-J2 cells in the upper well together with peripheral blood mononuclear cells in the bottom well and found that apical TLR2 stimulation of IPEC-J2 cells could alleviate the reduction in cell survival and proliferation of immune cells. Conclusively, TLR2 signaling on intestinal epithelial cells may enhance intestinal barrier function and prevent DON-induced barrier dysfunction of epithelial cells.
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Affiliation(s)
- Min Jeong Gu
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea. .,Biomodulation Major and Center for Food Bioconvergence, Seoul National University, Seoul, 151-921, Republic of Korea.
| | - Sun Kwang Song
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea.
| | - In Kyu Lee
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea.
| | - Seongyeol Ko
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea. .,Biomodulation Major and Center for Food Bioconvergence, Seoul National University, Seoul, 151-921, Republic of Korea.
| | - Seung Eun Han
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea. .,Biomin Korea Ltd., Seoul, 153-714, Republic of Korea.
| | - Suhan Bae
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea. .,Seoulfeed Co., Ltd., Incheon, 405-819, Republic of Korea.
| | - Sang Yun Ji
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea. .,National Institute of Animal Science, Rural Development Administration, Jeonju, 565-851, Republic of Korea.
| | - Byung-Chul Park
- Institute of Green Bio Science Technology, Seoul National University, Pyeongchang, 232-916, Republic of Korea.
| | - Ki-Duk Song
- Department of Animal Biotechnology, Chonbuk National University, Jeonju, 561-756, Republic of Korea.
| | - Hak-Kyo Lee
- Department of Animal Biotechnology, Chonbuk National University, Jeonju, 561-756, Republic of Korea.
| | - Seung Hyun Han
- Department of Oral Microbiology and Immunology, School of Dentistry, Seoul National University, Seoul, 110-749, Republic of Korea.
| | - Cheol-Heui Yun
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea. .,Biomodulation Major and Center for Food Bioconvergence, Seoul National University, Seoul, 151-921, Republic of Korea. .,Institute of Green Bio Science Technology, Seoul National University, Pyeongchang, 232-916, Republic of Korea.
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27
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Kluess JW, Kahlert S, Kröber A, Diesing AK, Rothkötter HJ, Wimmers K, Dänicke S. Deoxynivalenol, but not E. coli lipopolysaccharide, changes the response pattern of intestinal porcine epithelial cells (IPEC-J2) according to its route of application. Toxicol Lett 2015; 239:161-71. [PMID: 26417708 DOI: 10.1016/j.toxlet.2015.09.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 09/23/2015] [Accepted: 09/24/2015] [Indexed: 01/21/2023]
Abstract
The porcine intestinal epithelium is a primary target for mycotoxin deoxynivalenol (DON) and lipopolysaccharides (LPS). Although epithelial cells are exposed to these toxins mainly from the luminal-chyme compartment an exposure from the blood side resulting from systemic absorption cannot be excluded. Thus, we investigated the effect of DON and LPS, alone or combined, on porcine intestinal epithelial cells IPEC-J2 on a transcriptional, translational and functional level when administered either from apical or basolateral. IPEC-J2 cells were cultured on 12-well inserts in complete medium at 5% CO2 and 39°C and subjected to following treatments: control (CON), 2000 ng/mL DON, 1 μg/mL LPS or DON+LPS for 72 h, either from apical or basolateral. Transepithelial electrical resistance (TEER), protein and IL-8 content were measured and microarray analysis, qRT-PCR (IL-8, zonula occludens-1 ZO-1, β-actin), Western Blot (ZO-1, β-actin) and immunofluorescence (ZO-1) were performed. Data of at least three independent experiments were analysed with ANOVA and Dunnett's post hoc test. Basolateral DON resulted in significantly lower cell counts (p<0.05) with larger cells (p<0.01), whereas apical DON reduced total (p<0.001) and specific protein content (IL-8 content CON vs. DON: 2378 pg/3 mL vs. 991 pg/3 mL; p<0.001). Transcripts of ß-actin and ZO-1 were significantly upregulated in response to DON, irrespective of direction, whereas IL-8 mRNA remained unaffected. However, ZO-1 spatial distribution in the tight junction and its function (TEER) were detrimentally affected by basolateral DON only. In conclusion, direction of DON exposure affected IPEC-J2 differently on a translational and functional level, but was mainly inconsequential on a transcriptional level.
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Affiliation(s)
- J W Kluess
- Institute of Animal Nutrition, Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, Braunschweig, Germany.
| | - S Kahlert
- Institute of Anatomy, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - A Kröber
- Institute of Anatomy, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - A-K Diesing
- Institute of Anatomy, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - H-J Rothkötter
- Institute of Anatomy, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Klaus Wimmers
- Genome Biology, Leibniz Institute for Farm Animal Biology, Dummerstorf, Germany
| | - S Dänicke
- Institute of Animal Nutrition, Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, Braunschweig, Germany
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28
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Fruhmann P, Weigl-Pollack T, Mikula H, Wiesenberger G, Adam G, Varga E, Berthiller F, Krska R, Hametner C, Fröhlich J. Methylthiodeoxynivalenol (MTD): insight into the chemistry, structure and toxicity of thia-Michael adducts of trichothecenes. Org Biomol Chem 2015; 12:5144-50. [PMID: 24903010 DOI: 10.1039/c4ob00458b] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Methylthiodeoxynivalenol (MTD), a novel derivative of the trichothecene mycotoxin deoxynivalenol (DON), was prepared by applying a reliable procedure for the formal Michael addition of methanethiol to the conjugated double bond of DON. Structure elucidation revealed the preferred formation of the hemiketal form of MTD by intramolecular cyclisation between C8 and C15. Computational investigations showed a negative total reaction energy for the hemiketalisation step and its decrease in comparison with theoretical model compounds. Therefore, this structural behaviour seems to be a general characteristic of thia-Michael adducts of type B trichothecenes. MTD was shown to be less inhibitory for a reticulocyte lysate based in vitro translation system than the parent compound DON, which supports the hypothesis that trichothecenes are detoxified through thia-adduct formation during xenobiotic metabolism.
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Affiliation(s)
- Philipp Fruhmann
- Institute of Applied Synthetic Chemistry, Vienna University of Technology (VUT), Getreidemarkt 9/163, 1060 Vienna, Austria.
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29
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Structural basis for the inhibition of the eukaryotic ribosome. Nature 2014; 513:517-22. [DOI: 10.1038/nature13737] [Citation(s) in RCA: 349] [Impact Index Per Article: 34.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 08/06/2014] [Indexed: 11/08/2022]
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30
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Gu MJ, Song SK, Park SM, Lee IK, Yun CH. Bacillus subtilis Protects Porcine Intestinal Barrier from Deoxynivalenol via Improved Zonula Occludens-1 Expression. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2014; 27:580-6. [PMID: 25049991 PMCID: PMC4093535 DOI: 10.5713/ajas.2013.13744] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2013] [Revised: 01/08/2014] [Accepted: 12/10/2013] [Indexed: 02/07/2023]
Abstract
Intestinal epithelial cells (IECs) forming the barrier for the first-line of protection are interconnected by tight junction (TJ) proteins. TJ alteration results in impaired barrier function, which causes potentially excessive inflammation leading to intestinal disorders. It has been suggested that toll-like receptor (TLR) 2 ligands and some bacteria enhance epithelial barrier function in humans and mice. However, no such study has yet to be claimed in swine. The aim of the present study was to examine whether Bacillus subtilis could improve barrier integrity and protection against deoxynivalenol (DON)-induced barrier disruption in porcine intestinal epithelial cell line (IPEC-J2). We found that B. subtilis decreased permeability of TJ and improved the expression of zonula occludens (ZO)-1 and occludin during the process of forming TJ. In addition, ZO-1 expression of IPEC-J2 cells treated with B. subtilis was up-regulated against DON-induced damage. In conclusion, B. subtilis may have potential to enhance epithelial barrier function and to prevent the cells from DON-induced barrier dysfunction.
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Affiliation(s)
- Min Jeong Gu
- WCU Biomodulation major and Center for Food and Bioconvergence, Seoul National University, Seoul, 151-742, Korea
| | - Sun Kwang Song
- WCU Biomodulation major and Center for Food and Bioconvergence, Seoul National University, Seoul, 151-742, Korea
| | - Sung Moo Park
- WCU Biomodulation major and Center for Food and Bioconvergence, Seoul National University, Seoul, 151-742, Korea
| | - In Kyu Lee
- WCU Biomodulation major and Center for Food and Bioconvergence, Seoul National University, Seoul, 151-742, Korea
| | - Cheol-Heui Yun
- WCU Biomodulation major and Center for Food and Bioconvergence, Seoul National University, Seoul, 151-742, Korea
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31
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Fruhmann P, Mikula H, Wiesenberger G, Varga E, Lumpi D, Stöger B, Häubl G, Lemmens M, Berthiller F, Krska R, Adam G, Hametner C, Fröhlich J. Isolation and structure elucidation of pentahydroxyscirpene, a trichothecene Fusarium mycotoxin. JOURNAL OF NATURAL PRODUCTS 2014; 77:188-192. [PMID: 24367932 PMCID: PMC3903343 DOI: 10.1021/np4008365] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Indexed: 06/03/2023]
Abstract
Pentahydroxyscirpene, a novel trichothecene-type compound, was isolated from Fusarium-inoculated rice. The structure of pentahydroxyscirpene was elucidated by 1D and 2D NMR spectroscopy and X-ray single-crystal diffraction. The conformation in solution was determined by NOESY experiments supported by quantum chemical calculations. In vitro toxicity tests showed that pentahydroxyscirpene inhibits protein synthesis as do other trichothecenes.
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Affiliation(s)
- Philipp Fruhmann
- Institute
of Applied Synthetic Chemistry, Vienna University
of Technology (VUT), Getreidemarkt 9/163, A-1060 Vienna, Austria
| | - Hannes Mikula
- Institute
of Applied Synthetic Chemistry, Vienna University
of Technology (VUT), Getreidemarkt 9/163, A-1060 Vienna, Austria
| | - Gerlinde Wiesenberger
- Department
of Applied Genetics and Cell Biology, University
of Natural Resources and Life Sciences, Vienna (BOKU), Konrad Lorenz Str. 24, 3430 Tulln, Austria
| | - Elisabeth Varga
- Christian
Doppler Laboratory for Mycotoxin Metabolism and Center for Analytical
Chemistry, Department for Agrobiotechnology (IFA-Tulln), University of Natural Resources and Life Sciences,
Vienna (BOKU), Konrad
Lorenz Str. 20, 3430 Tulln, Austria
| | - Daniel Lumpi
- Institute
of Applied Synthetic Chemistry, Vienna University
of Technology (VUT), Getreidemarkt 9/163, A-1060 Vienna, Austria
| | - Berthold Stöger
- Institute
of Chemical Technologies and Analytics, Vienna University of Technology (VUT), Getreidemarkt 9/164, 1060 Vienna, Austria
| | - Georg Häubl
- Romer
Laboratories Division Holding GmbH, Technopark 1, 3430 Tulln, Austria
| | - Marc Lemmens
- Institute
for Biotechnology in Plant Production, Department for Agrobiotechnology
(IFA-Tulln), University of Natural Resources
and Life Sciences, Vienna (BOKU), Konrad Lorenz Str. 20, 3430 Tulln, Austria
| | - Franz Berthiller
- Christian
Doppler Laboratory for Mycotoxin Metabolism and Center for Analytical
Chemistry, Department for Agrobiotechnology (IFA-Tulln), University of Natural Resources and Life Sciences,
Vienna (BOKU), Konrad
Lorenz Str. 20, 3430 Tulln, Austria
| | - Rudolf Krska
- Christian
Doppler Laboratory for Mycotoxin Metabolism and Center for Analytical
Chemistry, Department for Agrobiotechnology (IFA-Tulln), University of Natural Resources and Life Sciences,
Vienna (BOKU), Konrad
Lorenz Str. 20, 3430 Tulln, Austria
| | - Gerhard Adam
- Department
of Applied Genetics and Cell Biology, University
of Natural Resources and Life Sciences, Vienna (BOKU), Konrad Lorenz Str. 24, 3430 Tulln, Austria
| | - Christian Hametner
- Institute
of Applied Synthetic Chemistry, Vienna University
of Technology (VUT), Getreidemarkt 9/163, A-1060 Vienna, Austria
| | - Johannes Fröhlich
- Institute
of Applied Synthetic Chemistry, Vienna University
of Technology (VUT), Getreidemarkt 9/163, A-1060 Vienna, Austria
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32
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Pan X, Whitten DA, Wilkerson CG, Pestka JJ. Dynamic changes in ribosome-associated proteome and phosphoproteome during deoxynivalenol-induced translation inhibition and ribotoxic stress. Toxicol Sci 2013; 138:217-33. [PMID: 24284785 DOI: 10.1093/toxsci/kft270] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Deoxynivalenol (DON), a trichothecene mycotoxin produced by Fusarium that commonly contaminates cereal-based food, interacts with the ribosome to cause translation inhibition and activate stress kinases in mononuclear phagocytes via the ribotoxic stress response (RSR). The goal of this study was to test the hypothesis that the ribosome functions as a platform for spatiotemporal regulation of translation inhibition and RSR. Specifically, we employed stable isotope labeling of amino acids in cell culture (SILAC)-based proteomics to quantify the early (≤ 30 min) DON-induced changes in ribosome-associated proteins in RAW 264.7 murine macrophage. Changes in the proteome and phosphoproteome were determined using off-gel isoelectric focusing and titanium dioxide chromatography, respectively, in conjunction with LC-MS/MS. Following exposure of RAW 264.7 to a toxicologically relevant concentration of DON (250 ng/ml), we observed an overall decrease in translation-related proteins interacting with the ribosome, concurrently with a compensatory increase in proteins that mediate protein folding, biosynthesis, and cellular organization. Alterations in the ribosome-associated phosphoproteome reflected proteins that modulate translational and transcriptional regulation, and others that converged with signaling pathways known to overlap with phosphorylation changes characterized previously in intact RAW 264.7 cells. These results suggest that the ribosome plays a central role as a hub for association and phosphorylation of proteins involved in the coordination of early translation inhibition as well as recruitment and maintenance of stress-related proteins-both of which enable cells to adapt and respond to ribotoxin exposure. This study provides a template for elucidating the molecular mechanisms of DON and other ribosome-targeting agents.
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Affiliation(s)
- Xiao Pan
- * Department of Biochemistry and Molecular Biology
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33
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Klunker LR, Kahlert S, Panther P, Diesing AK, Reinhardt N, Brosig B, Kersten S, Dänicke S, Rothkötter HJ, Kluess JW. Deoxynivalenol and E.coli lipopolysaccharide alter epithelial proliferation and spatial distribution of apical junction proteins along the small intestinal axis1. J Anim Sci 2013; 91:276-85. [DOI: 10.2527/jas.2012-5453] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- L. R. Klunker
- Institute of Anatomy, Medical Faculty, Otto-von-Guericke University, 39120 Magdeburg, Germany
| | - S. Kahlert
- Institute of Anatomy, Medical Faculty, Otto-von-Guericke University, 39120 Magdeburg, Germany
| | - P. Panther
- Institute of Anatomy, Medical Faculty, Otto-von-Guericke University, 39120 Magdeburg, Germany
| | - A.-K. Diesing
- Institute of Anatomy, Medical Faculty, Otto-von-Guericke University, 39120 Magdeburg, Germany
| | - N. Reinhardt
- Institute of Anatomy, Medical Faculty, Otto-von-Guericke University, 39120 Magdeburg, Germany
| | - B. Brosig
- Institute of Animal Nutrition, Federal Research Institute for Animal Health, 38116 Braunschweig, Germany
| | - S. Kersten
- Institute of Animal Nutrition, Federal Research Institute for Animal Health, 38116 Braunschweig, Germany
| | - S. Dänicke
- Institute of Animal Nutrition, Federal Research Institute for Animal Health, 38116 Braunschweig, Germany
| | - H.-J. Rothkötter
- Institute of Anatomy, Medical Faculty, Otto-von-Guericke University, 39120 Magdeburg, Germany
| | - J. W. Kluess
- Institute of Anatomy, Medical Faculty, Otto-von-Guericke University, 39120 Magdeburg, Germany
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34
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Stanek C, Reinhardt N, Diesing AK, Nossol C, Kahlert S, Panther P, Kluess J, Rothkötter HJ, Kuester D, Brosig B, Kersten S, Dänicke S. A chronic oral exposure of pigs with deoxynivalenol partially prevents the acute effects of lipopolysaccharides on hepatic histopathology and blood clinical chemistry. Toxicol Lett 2012; 215:193-200. [DOI: 10.1016/j.toxlet.2012.10.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 10/11/2012] [Accepted: 10/13/2012] [Indexed: 02/02/2023]
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Awad W, Ghareeb K, Dadak A, Gille L, Staniek K, Hess M, Böhm J. Genotoxic effects of deoxynivalenol in broiler chickens fed low-protein feeds. Poult Sci 2012; 91:550-5. [DOI: 10.3382/ps.2011-01742] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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36
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Lowe R, Jubault M, Canning G, Urban M, Hammond-Kosack KE. The induction of mycotoxins by trichothecene producing Fusarium species. Methods Mol Biol 2012; 835:439-455. [PMID: 22183670 DOI: 10.1007/978-1-61779-501-5_27] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In recent years, many Fusarium species have emerged which now threaten the productivity and safety of small grain cereal crops worldwide. During floral infection and post-harvest on stored grains the Fusarium hyphae produce various types of harmful mycotoxins which subsequently contaminate food and feed products. This article focuses specifically on the induction and production of the type B sesquiterpenoid trichothecene mycotoxins. Methods are described which permit in liquid culture the small or large scale production and detection of deoxynivalenol (DON) and its various acetylated derivatives. A wheat (Triticum aestivum L.) ear inoculation assay is also explained which allows the direct comparison of mycotoxin production by species, chemotypes and strains with different growth rates and/or disease-causing abilities. Each of these methods is robust and can be used for either detailed time-course studies or end-point analyses. Various analytical methods are available to quantify the levels of DON, 3A-DON and 15A-DON. Some criteria to be considered when making selections between the different analytical methods available are briefly discussed.
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Affiliation(s)
- Rohan Lowe
- Department of Plant Pathology and Microbiology, Centre for Sustainable Pest and Disease Management, Rothamsted Research, Harpenden, UK
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37
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Sato I, Ito M, Ishizaka M, Ikunaga Y, Sato Y, Yoshida S, Koitabashi M, Tsushima S. Thirteen novel deoxynivalenol-degrading bacteria are classified within two genera with distinct degradation mechanisms. FEMS Microbiol Lett 2011; 327:110-7. [PMID: 22098388 DOI: 10.1111/j.1574-6968.2011.02461.x] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Revised: 11/04/2011] [Accepted: 11/14/2011] [Indexed: 11/29/2022] Open
Abstract
The mycotoxin deoxynivalenol (DON), a secondary metabolite produced by species of the plant pathogen Fusarium, causes serious problems in cereal crop production because of its toxicity towards humans and livestock. A biological approach for the degradation of DON using a DON-degrading bacterium (DDB) appears to be promising, although information about DDBs is limited. We isolated 13 aerobic DDBs from a variety of environmental samples, including field soils and wheat leaves. Of these 13 strains, nine belonged to the Gram-positive genus Nocardioides and other four to the Gram-negative genus Devosia. The degradation phenotypes of the two Gram types were clearly different; all washed cells of the 13 strains degraded 100 μg mL(-1) DON to below the detection limit (0.5 μg mL(-1)), but the conditions inducing the DON-degrading activities differed between the two Gram types. The HPLC profiles of the DON metabolites were also distinct between the two genera, although all strains produced 3-epi-deoxynivalenol. The Gram-positive strains showed DON assimilation in media containing DON as a carbon source, whereas the Gram-negatives did not. Our results suggest that aerobic DDBs are distributed within at least two phylogenetically restricted genera, suggesting independent evolution of the DON-degradation mechanisms.
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Affiliation(s)
- Ikuo Sato
- National Institute for Agro-Environmental Sciences, Tsukuba, Japan
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38
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Shank RA, Foroud NA, Hazendonk P, Eudes F, Blackwell BA. Current and future experimental strategies for structural analysis of trichothecene mycotoxins--a prospectus. Toxins (Basel) 2011; 3:1518-53. [PMID: 22295175 PMCID: PMC3268455 DOI: 10.3390/toxins3121518] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 12/12/2011] [Accepted: 12/13/2011] [Indexed: 01/08/2023] Open
Abstract
Fungal toxins, such as those produced by members of the order Hypocreales, have widespread effects on cereal crops, resulting in yield losses and the potential for severe disease and mortality in humans and livestock. Among the most toxic are the trichothecenes. Trichothecenes have various detrimental effects on eukaryotic cells including an interference with protein production and the disruption of nucleic acid synthesis. However, these toxins can have a wide range of toxicity depending on the system. Major differences in the phytotoxicity and cytotoxicity of these mycotoxins are observed for individual members of the class, and variations in toxicity are observed among different species for each individual compound. Furthermore, while diverse toxicological effects are observed throughout the whole cellular system upon trichothecene exposure, the mechanism of toxicity is not well understood. In order to comprehend how these toxins interact with the cell, we must first have an advanced understanding of their structure and dynamics. The structural analysis of trichothecenes was a subject of major interest in the 1980s, and primarily focused on crystallographic and solution-state Nuclear Magnetic Resonance (NMR) spectroscopic studies. Recent advances in structural determination through solution- and solid-state NMR, as well as computation based molecular modeling is leading to a resurgent interest in the structure of these and other mycotoxins, with the focus shifting in the direction of structural dynamics. The purpose of this work is to first provide a brief overview of the structural data available on trichothecenes and a characterization of the methods commonly employed to obtain such information. A summary of the current understanding of the relationship between structure and known function of these compounds is also presented. Finally, a prospectus on the application of new emerging structural methods on these and other related systems is discussed.
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Affiliation(s)
- Roxanne A. Shank
- Agriculture and Agri-Food Canada, 5403 1 Ave S, Lethbridge, AB T1J 4B1, Canada; (R.A.S.); (N.A.F.)
- University of Lethbridge, 4401 University Dr W, Lethbridge, AB T1K 3M4, Canada
| | - Nora A. Foroud
- Agriculture and Agri-Food Canada, 5403 1 Ave S, Lethbridge, AB T1J 4B1, Canada; (R.A.S.); (N.A.F.)
| | - Paul Hazendonk
- University of Lethbridge, 4401 University Dr W, Lethbridge, AB T1K 3M4, Canada
| | - François Eudes
- Agriculture and Agri-Food Canada, 5403 1 Ave S, Lethbridge, AB T1J 4B1, Canada; (R.A.S.); (N.A.F.)
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Awad WA, Vahjen W, Aschenbach JR, Zentek J. A diet naturally contaminated with the Fusarium mycotoxin deoxynivalenol (DON) downregulates gene expression of glucose transporters in the intestine of broiler chickens. Livest Sci 2011. [DOI: 10.1016/j.livsci.2011.02.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Nielsen JK, Vikström AC, Turner P, Knudsen LE. Deoxynivalenol transport across the human placental barrier. Food Chem Toxicol 2011; 49:2046-52. [DOI: 10.1016/j.fct.2011.05.016] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Revised: 04/28/2011] [Accepted: 05/16/2011] [Indexed: 01/26/2023]
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Qiang Z, Truong M, Meynen K, Murphy PA, Hendrich S. Efficacy of a mycotoxin binder against dietary fumonisin, deoxynivalenol, and zearalenone in rats. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:7527-7533. [PMID: 21650453 DOI: 10.1021/jf202042z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
It was hypothesized that a mycotoxin binder, Grainsure E, would inhibit adverse effects of a mixture of fumonisin B1, deoxynivalenol, and zearalenone in rats. For 14 and 28 days, 8-10 Sprague-Dawley rats were fed control diet, Grainsure E (0.5%), toxins (7 μg fumonisin B1/g, 8 μg of deoxynivalenol/g and 0.2 μg of zearalenone/g), toxins (12 μg of fumonisin B1/g, 9 μg of deoxynivalenol/g, and 0.2 μg of zearalenone/g + Grainsure E), or pair-fed to control for food intake of toxin-fed rats. After 28 days, decreased body weight gain was prevented by Grainsure E in toxin-fed female rats, indicating partial protection against deoxynivalenol and fumonisin B1. Two effects of fumonisin B1 were partly prevented by Grainsure E in toxin-fed rats, increased plasma alanine transaminase (ALT) and urinary sphinganine/sphingosine, but sphinganine/sphingosine increase was not prevented in females at the latter time point. Grainsure E prevented some effects of fumonisin B1 and deoxynivalenol in rats.
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Affiliation(s)
- Zhiyi Qiang
- Department of Food Science and Human Nutrition, Iowa State University, Ames, IA 50011, USA
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42
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Lymphocyte subpopulations in blood and duodenal epithelium of broilers fed diets contaminated with deoxynivalenol and zearalenone. Anim Feed Sci Technol 2011. [DOI: 10.1016/j.anifeedsci.2011.02.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Casteel M, Nielsen C, Kothlow S, Dietrich R, Märtlbauer E. Impact of DUSP1 on the apoptotic potential of deoxynivalenol in the epithelial cell line HepG2. Toxicol Lett 2010; 199:43-50. [DOI: 10.1016/j.toxlet.2010.08.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2010] [Revised: 08/04/2010] [Accepted: 08/06/2010] [Indexed: 10/19/2022]
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Diesing AK, Nossol C, Panther P, Walk N, Post A, Kluess J, Kreutzmann P, Dänicke S, Rothkötter HJ, Kahlert S. Mycotoxin deoxynivalenol (DON) mediates biphasic cellular response in intestinal porcine epithelial cell lines IPEC-1 and IPEC-J2. Toxicol Lett 2010; 200:8-18. [PMID: 20937367 DOI: 10.1016/j.toxlet.2010.10.006] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2010] [Revised: 10/01/2010] [Accepted: 10/05/2010] [Indexed: 10/19/2022]
Abstract
The Fusarium derived mycotoxin deoxynivalenol (DON) is frequently found in cereals used for human and animal nutrition. We studied effects of DON in non-transformed, non-carcinoma, polarized epithelial cells of porcine small intestinal origin (IPEC-1 and IPEC-J2) in a low (200 ng/mL) and a high (2000 ng/mL) concentration. Application of high DON concentrations showed significant toxic effects as indicated by a reduction in cell number, in cellular reduction capacity measured by MTT assay, reduced uptake of neutral red (NR) and a decrease in cell proliferation. High dose toxicity was accompanied by disintegration of tight junction protein ZO-1 and increase of cell cycle phase G2/M. Activation of caspase 3 was found as an early event in the high DON concentration with an initial maximum after 6-8 h. In contrast, application of 200 ng/mL DON exhibited a response pattern distinct from the high dose DON toxicity. The cell cycle, ZO-1 expression and distribution as well as caspase 3 activation were not changed. BrdU incorporation was significantly increased after 72 h incubation with 200 ng/mL DON and NR uptake was only transiently reduced after 24 h. Low dose effects of DON on intestinal epithelial cells were triggered by mechanisms different from those responsible for the high dose toxicity.
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Affiliation(s)
- Anne-Kathrin Diesing
- Institute of Anatomy, Medical Faculty, Otto-von-Guericke University Magdeburg, Leipziger Strasse 44, 39120 Magdeburg, Germany
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Yang H, Park SH, Choi HJ, Do KH, Kim J, An TJ, Lee SH, Moon Y. Mechanism-based alternative monitoring of endoplasmic reticulum stress by 8-keto-trichothecene mycotoxins using human intestinal epithelial cell line. Toxicol Lett 2010; 198:317-23. [DOI: 10.1016/j.toxlet.2010.07.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Accepted: 07/14/2010] [Indexed: 10/19/2022]
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Nocardioides sp. strain WSN05-2, isolated from a wheat field, degrades deoxynivalenol, producing the novel intermediate 3-epi-deoxynivalenol. Appl Microbiol Biotechnol 2010; 89:419-27. [PMID: 20857291 PMCID: PMC3291841 DOI: 10.1007/s00253-010-2857-z] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2010] [Revised: 08/01/2010] [Accepted: 08/31/2010] [Indexed: 11/15/2022]
Abstract
The mycotoxin deoxynivalenol (DON) causes serious problems worldwide in the production of crops such as wheat and barley because of its toxicity toward humans and livestock. A bacterial culture capable of degrading DON was obtained from soil samples collected in wheat fields using an enrichment culture procedure. The isolated bacterium, designated strain WSN05-2, completely removed 1,000 μg/mL of DON from the culture medium after incubation for 10 days. On the basis of phylogenetic studies, WSN05-2 was classified as a bacterium belonging to the genus Nocardioides. WSN05-2 showed significant growth in culture medium with DON as the sole carbon source. High-performance liquid chromatography analysis indicated the presence of a major initial metabolite of DON in the culture supernatant. The metabolite was identified as 3-epi-deoxynivalenol (3-epi-DON) by mass spectrometry and 1H and 13C nuclear magnetic resonance analysis. The amount of DON on wheat grain was reduced by about 90% at 7 days after inoculation with WSN05-2. This is the first report of a Nocardioides sp. strain able to degrade DON and of the yet unknown 3-epi-DON as an intermediate in the degradation of DON by a microorganism.
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Venancio TM, Balaji S, Aravind L. High-confidence mapping of chemical compounds and protein complexes reveals novel aspects of chemical stress response in yeast. MOLECULAR BIOSYSTEMS 2010; 6:175-81. [PMID: 20024079 PMCID: PMC3248796 DOI: 10.1039/b911821g] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chemical genetics in yeast has shown great potential for clarifying the pharmacology of various drugs. Investigating these results from a systems perspective has uncovered many facets of natural chemical tolerance, but many cellular interactions of chemicals still remain poorly understood. To uncover previously overlooked players in resistance to chemical stress we integrated several independent chemical genetics datasets with protein-protein interactions and a comprehensive collection of yeast protein complexes. As a consequence we were able to identify the potential targets and mode of action of certain poorly understood compounds. However, most complexes recovered in our analysis appear to perform indirect roles in countering deleterious effects of chemicals by constituting an underlying intricate buffering system that has been so far under-appreciated. This buffering role appears to be largely contributed to by complexes pertaining to chromatin and vesicular dynamics. The former set of complexes seems to act by setting up or maintaining gene expression states necessary to protect the cell against chemical effects. Among the latter complexes we found an important role for specific vesicle tethering complexes in tolerating particular sets of compounds, indicating that different chemicals might be routed via different points in the intracellular trafficking system. We also suggest a general operational similarity between these complexes and molecular capacitors (e.g. the chaperone Hsp90). Both have a key role in increasing the system's robustness, although at different levels, through buffering stress and mutation, respectively. It is therefore conceivable that some of these complexes identified here might have roles in molding the evolution of chemical resistance and response.
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Affiliation(s)
- Thiago M. Venancio
- National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, Maryland 20894, USA
| | - S. Balaji
- National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, Maryland 20894, USA
| | - L. Aravind
- National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, Maryland 20894, USA
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Doyle PJ, Saeed H, Hermans A, Gleddie SC, Hussack G, Arbabi-Ghahroudi M, Seguin C, Savard ME, MacKenzie CR, Hall JC. Intracellular expression of a single domain antibody reduces cytotoxicity of 15-acetyldeoxynivalenol in yeast. J Biol Chem 2009; 284:35029-39. [PMID: 19783651 PMCID: PMC2787364 DOI: 10.1074/jbc.m109.045047] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2009] [Revised: 09/08/2009] [Indexed: 11/06/2022] Open
Abstract
15-Acetyldeoxynivalenol (15-AcDON) is a low molecular weight sesquiterpenoid trichothecene mycotoxin associated with Fusarium ear rot of maize and Fusarium head blight of small grain cereals. The accumulation of mycotoxins such as deoxynivalenol (DON) and 15-AcDON within harvested grain is subject to stringent regulation as both toxins pose dietary health risks to humans and animals. These toxins inhibit peptidyltransferase activity, which in turn limits eukaryotic protein synthesis. To assess the ability of intracellular antibodies (intrabodies) to modulate mycotoxin-specific cytotoxocity, a gene encoding a camelid single domain antibody fragment (V(H)H) with specificity and affinity for 15-AcDON was expressed in the methylotropic yeast Pichia pastoris. Cytotoxicity and V(H)H immunomodulation were assessed by continuous measurement of cellular growth. At equivalent doses, 15-AcDON was significantly more toxic to wild-type P. pastoris than was DON. In turn, DON was orders of magnitude more toxic than 3-acetyldeoxynivalenol. Intracellular expression of a mycotoxin-specific V(H)H within P. pastoris conveyed significant (p = 0.01) resistance to 15-AcDON cytotoxicity at doses ranging from 20 to 100 mug.ml(-1). We also documented a biochemical transformation of DON to 15-AcDON to account for the attenuation of DON cytotoxicity at 100 and 200 mug.ml(-1). The proof of concept established within this eukaryotic system suggests that in planta V(H)H expression may lead to enhanced tolerance to mycotoxins and thereby limit Fusarium infection of commercial agricultural crops.
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Affiliation(s)
- Patrick J. Doyle
- From the Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G 2W1
| | - Hanaa Saeed
- Eastern Cereal and Oilseed Research Centre, Agriculture and AgriFood Canada, Ottawa, Ontario K1A 0C6, and
| | - Anne Hermans
- Eastern Cereal and Oilseed Research Centre, Agriculture and AgriFood Canada, Ottawa, Ontario K1A 0C6, and
| | - Steve C. Gleddie
- Eastern Cereal and Oilseed Research Centre, Agriculture and AgriFood Canada, Ottawa, Ontario K1A 0C6, and
| | - Greg Hussack
- Institute for Biological Sciences, National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada
| | - Mehdi Arbabi-Ghahroudi
- Institute for Biological Sciences, National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada
| | - Charles Seguin
- Eastern Cereal and Oilseed Research Centre, Agriculture and AgriFood Canada, Ottawa, Ontario K1A 0C6, and
| | - Marc E. Savard
- Eastern Cereal and Oilseed Research Centre, Agriculture and AgriFood Canada, Ottawa, Ontario K1A 0C6, and
| | - C. Roger MacKenzie
- Institute for Biological Sciences, National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada
| | - J. Christopher Hall
- From the Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G 2W1
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Döll S, Schrickx JA, Dänicke S, Fink-Gremmels J. Interactions of deoxynivalenol and lipopolysaccharides on cytokine excretion and mRNA expression in porcine hepatocytes and Kupffer cell enriched hepatocyte cultures. Toxicol Lett 2009; 190:96-105. [PMID: 19607891 DOI: 10.1016/j.toxlet.2009.07.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2009] [Revised: 07/01/2009] [Accepted: 07/06/2009] [Indexed: 01/09/2023]
Abstract
The effects of deoxynivalenol (DON) on the mRNA expression of cytokines and inflammation-related genes, as well as the cytokine secretion of porcine hepatocytes and Kupffer cell enriched hepatocyte cultures (co-cultures), were investigated in the absence or presence of LPS. DON and LPS acted in a synergistic manner with regard to a significantly increased mRNA expression of TNF-alpha in hepatocytes exposed to 500 nM or 2000 nM DON, or non-significant increase in co-cultures after 3h of exposure. TNF-alpha supernatant concentrations were increased due to LPS but did not reflect the synergistic effects with DON as observed at mRNA level. IL-6 mRNA in hepatocyte cultures at 6h paralleled the TNF-alpha supernatant pattern at this time point. In co-cultures and hepatocytes, a DON dose dependent induction of IL-6 mRNA was detected in cells not exposed to LPS. Supernatant concentrations of LPS-induced IL-6 were significantly decreased by 2000 nM DON in both types of cell cultures. Also the mRNA expression of the anti-inflammatory IL-10 was increased by DON to various degrees depending on DON-dose, stimulation with LPS and time point of measurement. After 6h, expression of iNOS was only induced by 2000 nM DON, but not in LPS treated cells. Even if mRNA induction was not paralleled by related supernatant concentrations of TNF-alpha, IL-6 and IL-10 under the conditions of the present investigations, it was clearly demonstrated that DON has the potential to provoke and modulate immunological reactions of porcine liver cells.
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Affiliation(s)
- Susanne Döll
- Division of Veterinary Pharmacology, Pharmacy and Toxicology, Department of Equine Science, Faculty of Veterinary Medicine, Utrecht University, The Netherlands.
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Bowens P, Lancova K, Dip R, Povilaityte V, Stroka J, Naegeli H. A new PCR-based bioassay strategy for the detection of type A trichothecenes in food. Analyst 2009; 134:939-44. [PMID: 19381388 DOI: 10.1039/b821023c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Type A trichothecenes (primarily T-2 and HT-2 toxins) are common fungal metabolites found in a wide range of grains and other field crops grown in temperate climatic zones. By acting as potent inhibitors of protein synthesis, T-2 and HT-2 exert adverse effects particularly against rapidly proliferating tissues, including the bone marrow, the immune system and epithelial cells. Based on toxicity studies in laboratory and farm animals, a temporary tolerable daily intake for the sum of T-2 and HT-2 has been issued in the European Union. However, exposure assessments suggest that the combined intake of these natural compounds exceeds in many cases the proposed threshold. To further protect the consumers, it is therefore necessary to screen a large number of food samples for parts per billion levels of both T-2 and HT-2. Towards that goal, we are the first to report that these two type A trichothecenes induce fast and high-amplitude transcriptional changes in cultured human breast cancer cells. This specific response involving marker gene inductions by more than 1000-fold has been exploited to develop a real-time PCR-based screening method that displays a limit of detection of 5 ng g(-1) for T-2 and 10 ng g(-1) for HT-2. The practicability of this bioassay is demonstrated by its application to the detection of type A trichothecenes in different food matrices.
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Affiliation(s)
- Priscilla Bowens
- Institute of Pharmacology and Toxicology, University of Zürich-Vetsuisse, CH-8057 Zürich, Switzerland
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