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Hudu AR, Addy F, Mahunu GK, Abubakari A, Opoku N. Zearalenone contamination in maize, its associated producing fungi, control strategies, and legislation in Sub-Saharan Africa. Food Sci Nutr 2024; 12:4489-4512. [PMID: 39055180 PMCID: PMC11266927 DOI: 10.1002/fsn3.4125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 02/26/2024] [Accepted: 03/13/2024] [Indexed: 07/27/2024] Open
Abstract
The fungal genus Fusarium contains many important plant pathogens as well as endophytes of wild and crop plants. Globally, Fusarium toxins in food crops are considered one of the greatest food safety concerns. Their occurrence has become more pronounced in Africa in recent times. Among the major Fusarium mycotoxins with food and feed safety concerns, zearalenone is frequently detected in finished feeds and cereals in Africa. However, the impact of indigenous agricultural practices (pre- and postharvest factors) and food processing techniques on the prevalence rate of Fusarium species and zearalenone occurrence in food and feed have not been collated and documented systematically. This review studies and analyzes recent reports on zearalenone contamination in maize and other cereal products from Africa, including its fungi producers, agronomic and climate variables impacting their occurrences, preventive measures, removal/decontamination methods, and legislations regulating their limits. Reports from relevant studies demonstrated a high prevalence of F. verticillioides and F. graminearum as Africa's main producers of zearalenone. Elevated CO2 concentration and high precipitation may carry along an increased risk of zearalenone contamination in maize. African indigenous processing methods may contribute to reduced ZEA levels in agricultural products and foods. Most African countries do not know their zearalenone status in the food supply chain and they have limited regulations that control its occurrence.
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Affiliation(s)
- Abdul Rashid Hudu
- Department of Agricultural Biotechnology, Faculty of Agriculture, Food and Consumer SciencesUniversity for Development StudiesNyankpalaGhana
| | - Francis Addy
- Department of Biotechnology and Molecular Biology, Faculty of BiosciencesUniversity for Development StudiesNyankpalaGhana
| | - Gustav Komla Mahunu
- Department of Food Science and Technology, Faculty of Agriculture, Food, and Consumer SciencesUniversity for Development StudiesNyankpalaGhana
| | - Abdul‐Halim Abubakari
- Department of Horticulture, Faculty of Agriculture, Food, and Consumer SciencesUniversity for Development StudiesNyankpalaGhana
| | - Nelson Opoku
- Department of Biotechnology and Molecular Biology, Faculty of BiosciencesUniversity for Development StudiesNyankpalaGhana
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De Troyer L, De Zutter N, De Saeger S, Dumoulin F, Croubels S, De Baere S, De Gelder L, Audenaert K. Actinobacteria as Promising Biocontrol Agents for In Vitro and In Planta Degradation and Detoxification of Zearalenone. Toxins (Basel) 2024; 16:253. [PMID: 38922147 PMCID: PMC11209476 DOI: 10.3390/toxins16060253] [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: 04/19/2024] [Revised: 05/13/2024] [Accepted: 05/27/2024] [Indexed: 06/27/2024] Open
Abstract
Zearalenone (ZEN) is a prevalent mycotoxin found in grains and grain-derived products, inducing adverse health effects in both animals and humans. The in-field application of microorganisms to degrade and detoxify ZEN is a promising strategy to enhance the safety of food and feed. In this study, we investigated the potential of three actinobacterial strains to degrade and detoxify ZEN in vitro and in planta on wheat ears. The residual ZEN concentration and toxicity in the samples were analysed with UHPLC-MS/MS and a bioluminescence BLYES assay, respectively. Streptomyces rimosus subsp. rimosus LMG19352 could completely degrade and detoxify 5 mg/L ZEN in LB broth within 24 h, along with significant reductions in ZEN concentration both in a minimal medium (MM) and on wheat ears. Additionally, it was the only strain that showed a significant colonisation of these ears. Rhodococcus sp. R25614 exhibited partial but significant degradation in LB broth and MM, whereas Streptomyces sp. LMG16995 degraded and detoxified ZEN in LB broth after 72 h by 39% and 33%, respectively. Although all three actinobacterial strains demonstrated the metabolic capability to degrade and detoxify ZEN in vitro, only S. rimosus subsp. rimosus LMG19352 showed promising potential to mitigate ZEN in planta. This distinction underscores the importance of incorporating in planta screening assays for assessing the potential of mycotoxin-biotransforming microorganisms as biocontrol agents.
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Affiliation(s)
- Larissa De Troyer
- Laboratory of Applied Mycology and Phenomics, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium
| | - Noémie De Zutter
- Laboratory of Applied Mycology and Phenomics, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium
| | - Sarah De Saeger
- Centre of Excellence in Mycotoxicology and Public Health, Department of Bio-Analysis, Faculty of Pharmaceutical Sciences, Ghent University, 9000 Ghent, Belgium
| | - Frédéric Dumoulin
- Centre of Excellence in Mycotoxicology and Public Health, Department of Bio-Analysis, Faculty of Pharmaceutical Sciences, Ghent University, 9000 Ghent, Belgium
| | - Siska Croubels
- Laboratory of Pharmacology and Toxicology, Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, 9820 Merelbeke, Belgium
| | - Siegrid De Baere
- Laboratory of Pharmacology and Toxicology, Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, 9820 Merelbeke, 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 Plants and Crops, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium
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Pfleger F, Schwake-Anduschus C. Relevance of Zearalenone and its modified forms in bakery products. Mycotoxin Res 2023:10.1007/s12550-023-00493-3. [PMID: 37322296 PMCID: PMC10393900 DOI: 10.1007/s12550-023-00493-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 05/26/2023] [Accepted: 05/30/2023] [Indexed: 06/17/2023]
Abstract
Zearalenone is a frequently occurring and well-known mycotoxin developed in cereals before and during the harvest period by Fusarium spp. mainly in maize and wheat. In addition to the main form, various modified forms (phase I and II metabolites) were detected, in some cases in high amounts. These modified forms can be harmful for human health due to their different toxicity, which can be much higher compared to the parent toxin. In addition, the parent toxin can be cleaved from the phase I and II metabolites during digestion. A risk of correlated and additive adverse effects of the metabolites of ZEN phase I and II in humans and animals is evident. ZEN is considered in many studies on its occurrence in grain-based foods and some studies are dedicated to the behavior of ZEN during food processing. This is not the case for the ZEN phase I and II metabolites, which are only included in a few occurrence reports. Their effects during food processing is also only sporadically addressed in studies to date. In addition to the massive lack of data on the occurrence and behavior of ZEN modified forms, there is also a lack of comprehensive clarification of the toxicity of the numerous different ZEN metabolites detected to date. Finally, studies on the fate during digestion of the relevant ZEN metabolites will be important in the future to further clarify their relevance in processed foods such as bakery products.
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Affiliation(s)
- Franz Pfleger
- Association for Cereal Research e.V., Detmold, Germany
| | - Christine Schwake-Anduschus
- Department of Safety and Quality of Cereals, Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Detmold, Germany.
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How does multiannual plastic mulching in strawberry cultivation influence soil fungi and mycotoxin occurrence in soil? Mycotoxin Res 2022; 38:93-105. [PMID: 35316485 PMCID: PMC9038900 DOI: 10.1007/s12550-022-00451-5] [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: 08/11/2021] [Revised: 02/03/2022] [Accepted: 02/17/2022] [Indexed: 12/03/2022]
Abstract
The production of mycotoxins is often interpreted as fungal response to cope with unfavorable growth conditions induced by toxic substances, environmental and biological factors. Soil covers influence soil environment, which consequently can change the abundance and composition of microbial communities. We investigated how plastic coverage (PC) influence soil fungi and mycotoxin occurrence (deoxynivalenol, nivalenol and zearalenone) compared to the traditional straw coverage (SC) in dependence of soil depth and time in a 3-year field experiment in strawberry cultivation. In total, 300 soil samples, resulting from two treatments, three soil layers, and ten sampling dates (n = 5), were analyzed for mycotoxins and ergosterol (proxy for soil fungal biomass) with liquid chromatography high resolution mass spectrometry and high-performance liquid chromatography with UV-detection, respectively. The modified microclimate under PC had no significant influence on fungal biomass, whereas SC promoted fungal biomass in the topsoil due to C-input. Mycotoxins were detected under both cover types in concentrations between 0.3 and 21.8 µg kg−1, mainly during strawberry establishment period and after fungicide application. Deoxynivalenol had the highest detection frequency with 26.3% (nivalenol: 8.3%, zearalenone: 8.7%). This study confirmed the in situ production of mycotoxins in soil, which seems mainly triggered by field treatment (fungicide application) and plant growth stage (establishment period) rather than on mulching type. Further investigations are necessary to better understand the influence of different agricultural practices and soil types on the production and fate of mycotoxins.
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Kenngott KGJ, Albert J, Meyer-Wolfarth F, Schaumann GE, Muñoz K. Fusarium Mycotoxins in Maize Field Soils: Method Validation and Implications for Sampling Strategy. Toxins (Basel) 2022; 14:130. [PMID: 35202157 PMCID: PMC8875666 DOI: 10.3390/toxins14020130] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Revised: 01/21/2022] [Accepted: 01/25/2022] [Indexed: 02/05/2023] Open
Abstract
While mycotoxins are generally regarded as food contamination issues, there is growing interest in mycotoxins as environmental pollutants. The main sources of trichothecene and zearalenone mycotoxins in the environment are mainly attributed to Fusarium infested fields, where mycotoxins can wash off in infested plants or harvest residues. Subsequently, mycotoxins inevitably enter the soil. In this context, investigations into the effects, fate, and transport are still needed. However, there is a lack of analytical methods used to determine Fusarium toxins in soil matrices. We aimed to validate an analytical method capable of determining the toxins nivalenol (NIV), deoxynivalenol (DON), 15-acetyl-deoxynivalenol (15-AcDON), and zearalenone (ZEN), at environmentally relevant concentrations, in five contrasting agricultural soils. Soils were spiked at three levels (3, 9 and 15 ng g-1), extracted by solid-liquid extraction assisted with ultrasonication, using a generic solvent composition of acetonitrile:water 84:16 (v:v) and measured by LC-HRMS. Method validation was successful for NIV, DON, and 15-AcDON with mean recoveries > 93% and RSDr < 10%. ZEN failed the validation criteria. The validated method was applied to eight conventionally managed maize field soils during harvest season, to provide a first insight into DON, NIV, and 15-AcDON levels. Mycotoxins were present in two out of eight sampled maize fields. Soil mycotoxin concentrations ranged from 0.53 to 19.4 ng g-1 and 0.8 to 2.2 ng g-1 for DON and NIV, respectively. Additionally, we found indication that "hot-spot" concentrations were restricted to small scales (<5 cm) with implications for field scale soil monitoring strategies.
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Affiliation(s)
- Kilian G. J. Kenngott
- Group of Environmental and Soil Chemistry, Institute for Environmental Sciences (iES) Landau, University of Koblenz-Landau, Fortstraße 7, 76829 Landau, Germany; (K.G.J.K.); (J.A.); (G.E.S.)
| | - Julius Albert
- Group of Environmental and Soil Chemistry, Institute for Environmental Sciences (iES) Landau, University of Koblenz-Landau, Fortstraße 7, 76829 Landau, Germany; (K.G.J.K.); (J.A.); (G.E.S.)
| | - Friederike Meyer-Wolfarth
- Julius Kühn Institute (JKI), Federal Research Centre for Cultivated Plants, Institute for Plant Protection in Field Crops and Grassland, Messeweg 11/12, 38104 Braunschweig, Germany;
| | - Gabriele E. Schaumann
- Group of Environmental and Soil Chemistry, Institute for Environmental Sciences (iES) Landau, University of Koblenz-Landau, Fortstraße 7, 76829 Landau, Germany; (K.G.J.K.); (J.A.); (G.E.S.)
| | - Katherine Muñoz
- Group of Organic and Ecological Chemistry, Institute for Environmental Sciences (iES) Landau, University of Koblenz-Landau, Fortstraße 7, 76829 Landau, Germany
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Righetti L, Bhandari DR, Rolli E, Tortorella S, Bruni R, Dall’Asta C, Spengler B. Mycotoxin Uptake in Wheat - Eavesdropping Fusarium Presence for Priming Plant Defenses or a Trojan Horse to Weaken Them? FRONTIERS IN PLANT SCIENCE 2021; 12:711389. [PMID: 34381485 PMCID: PMC8350570 DOI: 10.3389/fpls.2021.711389] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 06/28/2021] [Indexed: 06/13/2023]
Abstract
Fusarium mycotoxins represent a major threat for cereal crops and food safety. While previous investigations have described plant biotransforming properties on mycotoxins or metabolic relapses of fungal infections in plants, so far, the potential consequences of radical exposure in healthy crops are mostly unknown. Therefore, we aimed at evaluating whether the exposure to mycotoxins, deoxynivalenol (DON) and zearalenone (ZEN), at the plant-soil interface may be considered a form of biotic stress capable of inducing priming or a potential initiation of fungal attack. To address this, we used atmospheric-pressure scanning microprobe matrix-assisted laser desorption/ionization mass spectrometry imaging to investigate the activation or the inhibition of specific biosynthetic pathways and in situ localization of primary and secondary metabolites in wheat. According to our untargeted metabolomics investigation, the translocation of plant defense metabolites (i.e., hydroxycinnamic acid amide and flavones) follows the mycotoxin accumulation organs, which is the root for ZEN-treated plantlet and culm for DON-treated sample, suggesting a local "defense-on-demand response." Therefore, it can be hypothesized that DON and ZEN are involved in the eavesdropping of Fusarium presence in soil and that wheat response based on secondary metabolites may operate on multiple organs with a potential interplay that involves masked mycotoxins.
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Affiliation(s)
- Laura Righetti
- Department of Food and Drug, University of Parma, Parma, Italy
- Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Giessen, Germany
| | - Dhaka Ram Bhandari
- Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Giessen, Germany
| | - Enrico Rolli
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, Italy
| | | | - Renato Bruni
- Department of Food and Drug, University of Parma, Parma, Italy
| | | | - Bernhard Spengler
- Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Giessen, Germany
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Peters J, Ash E, Gerssen A, Van Dam R, Franssen MCR, Nielen MWF. Controlled Production of Zearalenone-Glucopyranoside Standards with Cunninghamella Strains Using Sulphate-Depleted Media. Toxins (Basel) 2021; 13:366. [PMID: 34064219 PMCID: PMC8224279 DOI: 10.3390/toxins13060366] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 05/17/2021] [Accepted: 05/17/2021] [Indexed: 11/16/2022] Open
Abstract
In recent years, conjugated mycotoxins have gained increasing interest in food safety, as their hydrolysis in human and animal intestines leads to an increase in toxicity. For the production of zearalenone (ZEN) glycosides reference standards, we applied Cunninghamellaelegans and Cunninghamella echinulata fungal strains. A sulphate-depleted medium was designed for the preferred production of ZEN glycosides. Both Cunninghamella strains were able to produce zearalenone-14-β-D-glucopyranoside (Z14G), zearalenone-16-β-D-glucopyranoside (Z16G) and zearalenone-14-sulphate (Z14S). In a rich medium, Cunninghamellaelegans preferably produced Z14S, while Cunninghamellaechinulata preferably produced Z14G. In the sulphate-depleted medium a dramatic change was observed for Cunninghamellaelegans, showing preferred production of Z14G and Z16G. From 2 mg of ZEN in sulphate-depleted medium, 1.94 mg of Z14G and 0.45 mg of Z16G were produced. Following preparative Liquid Chromatography-Mass Spectrometry (LC-MS) purification, both fractions were submitted to 1H and 13C NMR and High-Resolution Mass Spectrometry (HRMS). These analyses confirmed that the purified fractions were indeed Z14G and Z16G. In conclusion, the presented research shows that a single Cunninghamella strain can be an effective and efficient tool for the controlled biotransformation of ZEN glycosides and other ZEN metabolites. Additionally, the biotransformation method was extended to zearalanone, β-zearalenol and other mycotoxins.
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Affiliation(s)
- Jeroen Peters
- Wageningen Food Safety Research, Wageningen University and Research, Akkermaalsbos 2, 6708 WB Wageningen, The Netherlands; (E.A.); (A.G.); (R.V.D.); (M.W.F.N.)
| | - Edward Ash
- Wageningen Food Safety Research, Wageningen University and Research, Akkermaalsbos 2, 6708 WB Wageningen, The Netherlands; (E.A.); (A.G.); (R.V.D.); (M.W.F.N.)
- Innosieve Diagnostics BV, Nieuwe Kanaal 7A, 6709 PA Wageningen, The Netherlands
| | - Arjen Gerssen
- Wageningen Food Safety Research, Wageningen University and Research, Akkermaalsbos 2, 6708 WB Wageningen, The Netherlands; (E.A.); (A.G.); (R.V.D.); (M.W.F.N.)
| | - Ruud Van Dam
- Wageningen Food Safety Research, Wageningen University and Research, Akkermaalsbos 2, 6708 WB Wageningen, The Netherlands; (E.A.); (A.G.); (R.V.D.); (M.W.F.N.)
| | - Maurice C. R. Franssen
- Laboratory of Organic Chemistry, Wageningen University, Stippeneng 4, 6708 WE Wageningen, The Netherlands;
| | - Michel W. F. Nielen
- Wageningen Food Safety Research, Wageningen University and Research, Akkermaalsbos 2, 6708 WB Wageningen, The Netherlands; (E.A.); (A.G.); (R.V.D.); (M.W.F.N.)
- Laboratory of Organic Chemistry, Wageningen University, Stippeneng 4, 6708 WE Wageningen, The Netherlands;
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Righetti L, Bhandari DR, Rolli E, Tortorella S, Bruni R, Dall'Asta C, Spengler B. Unveiling the spatial distribution of aflatoxin B1 and plant defense metabolites in maize using AP-SMALDI mass spectrometry imaging. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 106:185-199. [PMID: 33421236 DOI: 10.1111/tpj.15158] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 10/25/2020] [Accepted: 11/24/2020] [Indexed: 06/12/2023]
Abstract
In order to cope with the presence of unfavorable compounds, plants can biotransform xenobiotics, translocate both parent compounds and metabolites, and perform compartmentation and segregation at the cellular or tissue level. Such a scenario also applies to mycotoxins, fungal secondary metabolites with a pre-eminent role in plant infection. In this work, we aimed to describe the effect of the interplay between Zea mays (maize) and aflatoxin B1 (AFB1) at the tissue and organ level. To address this challenge, we used atmospheric pressure scanning microprobe matrix-assisted laser desorption/ionization mass spectrometry imaging (AP-SMALDI MSI) to investigate the biotransformation, localization and subsequent effects of AFB1 on primary and secondary metabolism of healthy maize plants, both in situ and from a metabolomics standpoint. High spatial resolution (5 µm) provided fine localization of AFB1, which was located within the root intercellular spaces, and co-localized with its phase-I metabolite aflatoxin M2. We provided a parallel visualization of maize metabolic changes, induced in different organs and tissues by an accumulation of AFB1. According to our untargeted metabolomics investigation, anthocyanin biosynthesis and chlorophyll metabolism in roots are most affected. The biosynthesis of these metabolites appears to be inhibited by AFB1 accumulation. On the other hand, metabolites found in above-ground organs suggest that the presence of AFB1 may also activate the biochemical response in the absence of an actual fungal infection; indeed, several plant secondary metabolites known for their antimicrobial or antioxidant activities were localized in the outer tissues, such as phenylpropanoids, benzoxazinoids, phytohormones and lipids.
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Affiliation(s)
- Laura Righetti
- Food and Drug Department, University of Parma, Viale delle Scienze 17/A, Parma, 43124, Italy
- Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, Giessen, 35392, Germany
| | - Dhaka Ram Bhandari
- Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, Giessen, 35392, Germany
| | - Enrico Rolli
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Via G.P. Usberti 11/a, Parma, 43124, Italy
| | - Sara Tortorella
- Molecular Horizon Srl, Via Montelino 30, Bettona, Perugia, 06084, Italy
| | - Renato Bruni
- Food and Drug Department, University of Parma, Viale delle Scienze 17/A, Parma, 43124, Italy
| | - Chiara Dall'Asta
- Food and Drug Department, University of Parma, Viale delle Scienze 17/A, Parma, 43124, Italy
| | - Bernhard Spengler
- Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, Giessen, 35392, Germany
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Righetti L, Rolli E, Dellafiora L, Galaverna G, Suman M, Bruni R, Dall’Asta C. Thinking Out of the Box: On the Ability of Zea mays L. to Biotrasform Aflatoxin B1 Into Its Modified Forms. FRONTIERS IN PLANT SCIENCE 2021; 11:599158. [PMID: 33510745 PMCID: PMC7835335 DOI: 10.3389/fpls.2020.599158] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 11/30/2020] [Indexed: 06/12/2023]
Abstract
While aflatoxin metabolism in animals has been clarified, very limited information is so far available on the possible biotransformation occurring in plants. Therefore, this work aimed at investigating whether AFB1 metabolites could occur in field-grown infected maize and the putative role of Zea mays L. metabolism in their production. For such scope, asymptomatic in vitro-grown plantlets and in silico evaluations of plant transforming enzymes were used to pinpoint how plants may handle these compounds. Our data demonstrated the role of maize plants in the production of Phase I hydroxylated aflatoxins, including, among others, AFM1, AFM2, and aflatoxicol, and suggest that plant cytochromes may be involved in this biotransformation of AFB1.
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Affiliation(s)
- Laura Righetti
- Department of Food and Drug, University of Parma, Parma, Italy
| | - Enrico Rolli
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, Italy
| | - Luca Dellafiora
- Department of Food and Drug, University of Parma, Parma, Italy
| | | | - Michele Suman
- Barilla G.R. F.lli SpA, Advanced Laboratory Research, Parma, Italy
| | - Renato Bruni
- Department of Food and Drug, University of Parma, Parma, Italy
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10
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Cheng Z, Sun H, Sidhu HS, Sy ND, Gan J. Metabolism of mono-(2-ethylhexyl) phthalate in Arabidopsis thaliana: Exploration of metabolic pathways by deuterium labeling. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 265:114886. [PMID: 32505963 DOI: 10.1016/j.envpol.2020.114886] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 05/25/2020] [Accepted: 05/25/2020] [Indexed: 06/11/2023]
Abstract
Mono-(2-ethylhexyl) phthalate (MEHP) is the primary monoester transformation product of the commonly used plasticizer, di-2-ethylhexyl phthalate (DEHP), and has been frequently detected in various environmental compartments (e.g., soil, biosolids, plants). Plants growing in contaminated soils can take up MEHP, and consumption of the contaminated plants may result in unintended exposure for humans and other organisms. The metabolism of MEHP in plants is poorly understood, but critical for evaluating the potential human and environmental health risks. The present study represents the first attempt to explore the metabolic fate of MEHP in plants. We used Arabidopsis thaliana cells as a plant model and explored metabolic pathways of MEHP using deuterium stable isotope labelling (SIL) coupled with time-of-flight high resolution mass spectrometer (TOF-HRMS). A. thaliana rapidly took up MEHP from the culture medium and mediated extensive metabolism of MEHP. Combining SIL with TOF-HRMS analysis was proved as a powerful method for identification of unknown MEHP metabolites. Four phase Ⅰ and three phase Ⅱ metabolites were confirmed or tentatively identified. Based on the detected transformation products, hydroxylation, oxidation, and malonylation are proposed as the potential MEHP metabolism pathways. In cells, the maximum fraction of each transformation product accounted for 2.8-56.5% of the total amount of metabolites during the incubation. For individual metabolites, up to 2.9-100% was found in the culture medium, suggesting plant excretion. The results in the cell culture experiments were further confirmed in cabbage and A. thaliana seedlings. The findings suggest active metabolism of MEHP in plants and highlight the need to include metabolites in refining environmental risk assessment of plasticizers in the agro-food systems.
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Affiliation(s)
- Zhipeng Cheng
- Department of Environmental Science, University of California, Riverside, CA, 92521, United States; MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China
| | - Hongwen Sun
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China
| | - Harmanpreet S Sidhu
- Department of Environmental Science, University of California, Riverside, CA, 92521, United States
| | - Nathan Darlucio Sy
- Department of Environmental Science, University of California, Riverside, CA, 92521, United States
| | - Jay Gan
- Department of Environmental Science, University of California, Riverside, CA, 92521, United States.
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11
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Kohn BN, Bunzel M. Zearalenone‐malonyl‐glucosides as phase II metabolites in plant cell suspension cultures. Cereal Chem 2020. [DOI: 10.1002/cche.10273] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Beate N. Kohn
- Department of Food Chemistry and Phytochemistry Karlsruhe Institute of Technology (KIT) Institute of Applied Biosciences Karlsruhe Germany
| | - Mirko Bunzel
- Department of Food Chemistry and Phytochemistry Karlsruhe Institute of Technology (KIT) Institute of Applied Biosciences Karlsruhe Germany
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12
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Li P, Su R, Yin R, Lai D, Wang M, Liu Y, Zhou L. Detoxification of Mycotoxins through Biotransformation. Toxins (Basel) 2020; 12:toxins12020121. [PMID: 32075201 PMCID: PMC7076809 DOI: 10.3390/toxins12020121] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 02/08/2020] [Accepted: 02/12/2020] [Indexed: 01/18/2023] Open
Abstract
Mycotoxins are toxic fungal secondary metabolites that pose a major threat to the safety of food and feed. Mycotoxins are usually converted into less toxic or non-toxic metabolites through biotransformation that are often made by living organisms as well as the isolated enzymes. The conversions mainly include hydroxylation, oxidation, hydrogenation, de-epoxidation, methylation, glycosylation and glucuronidation, esterification, hydrolysis, sulfation, demethylation and deamination. Biotransformations of some notorious mycotoxins such as alfatoxins, alternariol, citrinin, fomannoxin, ochratoxins, patulin, trichothecenes and zearalenone analogues are reviewed in detail. The recent development and applications of mycotoxins detoxification through biotransformation are also discussed.
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Affiliation(s)
- Peng Li
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing 100193, China; (P.L.); (R.S.); (R.Y.); (D.L.)
| | - Ruixue Su
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing 100193, China; (P.L.); (R.S.); (R.Y.); (D.L.)
| | - Ruya Yin
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing 100193, China; (P.L.); (R.S.); (R.Y.); (D.L.)
| | - Daowan Lai
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing 100193, China; (P.L.); (R.S.); (R.Y.); (D.L.)
| | - Mingan Wang
- Department of Applied Chemistry, College of Sciences, China Agricultural University, Beijing 100193, China;
| | - Yang Liu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
| | - Ligang Zhou
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing 100193, China; (P.L.); (R.S.); (R.Y.); (D.L.)
- Correspondence: ; Tel.: +86-10-6273-1199
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13
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Righetti L, Damiani T, Rolli E, Galaverna G, Suman M, Bruni R, Dall'Asta C. Exploiting the potential of micropropagated durum wheat organs as modified mycotoxin biofactories: The case of deoxynivalenol. PHYTOCHEMISTRY 2020; 170:112194. [PMID: 31731239 DOI: 10.1016/j.phytochem.2019.112194] [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: 08/08/2019] [Revised: 10/23/2019] [Accepted: 10/31/2019] [Indexed: 06/10/2023]
Abstract
This study aimed to investigate the potential of in vitro wheat model as biofactory for masked mycotoxin production. Micropropagated durum wheat organs (leaves and roots) were treated during a 14-day time span on a proper medium spiked with deoxynivalenol (DON). After the treatment, DON absorption from culture media was evaluated while roots and leaves were profiled by UHPLC-HRMS to investigate the DON biotransformation products. A total of 10 metabolites have been annotated in both roots and leaves. In particular, 5 phase I metabolites never reported before were putatively identified, suggesting the viability of the model as a tool to investigate the interplay between mycotoxins and wheat. In addition, 5 phase II metabolites previously reported in wheat grown under open field conditions, were identified in both roots and leaves, thus demonstrating the reliability of the cultured organs as model system for wheat plants. An organ-dependent difference in DON uptake and biotransformation was observed, since roots contained a high amount of untransformed DON, while leaves were able to effectively biotransform DON to its glycosylated form and other relevant metabolites. With the perspective of using cultured organs as biofactories for modified mycotoxin production, leaves seemed therefore to offer the best absorption and production yield.
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Affiliation(s)
- Laura Righetti
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124, Parma, Italy.
| | - Tito Damiani
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124, Parma, Italy
| | - Enrico Rolli
- Deparment of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Via Università 12, 43121, Parma, Italy
| | - Gianni Galaverna
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124, Parma, Italy
| | - Michele Suman
- Barilla G.R. F.lli SpA, Advanced Laboratory Research, via Mantova 166, Parma, Italy
| | - Renato Bruni
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124, Parma, Italy
| | - Chiara Dall'Asta
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124, Parma, Italy
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14
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Torres Acosta JA, Michlmayr H, Shams M, Schweiger W, Wiesenberger G, Mitterbauer R, Werner U, Merz D, Hauser MT, Hametner C, Varga E, Krska R, Berthiller F, Adam G. Zearalenone and ß-Zearalenol But Not Their Glucosides Inhibit Heat Shock Protein 90 ATPase Activity. Front Pharmacol 2019; 10:1160. [PMID: 31680951 PMCID: PMC6813925 DOI: 10.3389/fphar.2019.01160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 09/09/2019] [Indexed: 12/27/2022] Open
Abstract
The mycotoxin zearalenone (ZEN) is produced by many plant pathogenic Fusarium species. It is well known for its estrogenic activity in humans and animals, but whether ZEN has a role in plant–pathogen interaction and which process it is targeting in planta was so far unclear. We found that treatment of Arabidopsis thaliana seedlings with ZEN induced transcription of the AtHSP90.1 gene. This heat shock protein (HSP) plays an important role in plant–pathogen interaction, assisting in stability and functionality of various disease resistance gene products. Inhibition of HSP90 ATPase activity impairs functionality. Because HSP90 inhibitors are known to induce HSP90 gene expression and due to the structural similarity with the known HSP90 inhibitor radicicol (RAD), we tested whether ZEN and its phase I metabolites α- and ß-zearalenol are also HSP90 ATPase inhibitors. Indeed, AtHSP90.1 and wheat TaHSP90-2 were inhibited by ZEN and ß-zearalenol, while α-zearalenol was almost inactive. Plants can efficiently glycosylate ZEN and α/ß-zearalenol. We therefore tested whether glucosylation has an effect on the inhibitory activity of these metabolites. Expression of the A. thaliana glucosyltransferase UGT73C6 conferred RAD resistance to a sensitive yeast strain. Glucosylation of RAD, ZEN, and α/ß-zearalenol abolished the in vitro inhibitory activity with recombinant HSP90 purified from Escherichia coli. In conclusion, the mycotoxin ZEN has a very prominent target in plants, HSP90, but it can be inactivated by glycosylation. This may explain why there is little evidence for a virulence function of ZEN in host plants.
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Affiliation(s)
- Juan Antonio Torres Acosta
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Herbert Michlmayr
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Mehrdad Shams
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria.,Institute of Bioanalytics and Agro-Metabolomics, Department of Agrobiotechnology IFA-Tulln, University of Natural Resources and Life Sciences, Vienna (BOKU), Austria
| | - Wolfgang Schweiger
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Gerlinde Wiesenberger
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Rudolf Mitterbauer
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Ulrike Werner
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - David Merz
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Marie-Theres Hauser
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Christian Hametner
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Vienna, Austria
| | - Elisabeth Varga
- Institute of Bioanalytics and Agro-Metabolomics, Department of Agrobiotechnology IFA-Tulln, University of Natural Resources and Life Sciences, Vienna (BOKU), Austria
| | - Rudolf Krska
- Institute of Bioanalytics and Agro-Metabolomics, Department of Agrobiotechnology IFA-Tulln, University of Natural Resources and Life Sciences, Vienna (BOKU), Austria.,Institute for Global Food Security, School of Biological Sciences, Queens University Belfast, University Road, Belfast, United Kingdom
| | - Franz Berthiller
- Institute of Bioanalytics and Agro-Metabolomics, Department of Agrobiotechnology IFA-Tulln, University of Natural Resources and Life Sciences, Vienna (BOKU), Austria
| | - Gerhard Adam
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
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15
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Righetti L, Körber T, Rolli E, Galaverna G, Suman M, Bruni R, Dall'Asta C. Plant biotransformation of T2 and HT2 toxin in cultured organs of Triticum durum Desf. Sci Rep 2019; 9:14320. [PMID: 31586121 PMCID: PMC6778183 DOI: 10.1038/s41598-019-50786-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 08/30/2019] [Indexed: 01/08/2023] Open
Abstract
The present study aimed at elucidating the uptake and biotransformation of T2 and HT2 toxins in five cultivars of durum wheat, by means of cultured plant organs. An almost complete absorption of T2 toxin (up to 100 µg) was noticed after 7 days, along with the contemporaneous formation of HT2 in planta, whereas HT2 showed a slower uptake by uninfected plant organs. Untargeted MS-analysis allowed to identify a large spectrum of phase I and phase II metabolites, resulting in 26 T2 and 23 HT2 metabolites plus tentative isomers. A novel masked mycotoxin, 3-acetyl-HT2-glucoside, was reported for the first time in wheat. The in vitro approach confirmed its potential to both investigate the contribution of plant metabolism in the biosynthesis of masked mycotoxins and to foresee the development of biocatalytic tools to develop nature-like mixtures to be used as reference materials.
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Affiliation(s)
- Laura Righetti
- Department of Food and Drug, University of Parma, Viale delle Scienze 17/A, I-43124, Parma, Italy
| | - Tania Körber
- Chair of Analytical Food Chemistry, Technical University of Munich, Max-von-Imhof-Forum 2, D-85354, Freising, Germany
- Hamburg School of Food Science, Institute of Food Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, D-20146, Hamburg, Germany
| | - Enrico Rolli
- Department of Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Via G.P. Usberti 11/a, Parma, Italy
| | - Gianni Galaverna
- Department of Food and Drug, University of Parma, Viale delle Scienze 17/A, I-43124, Parma, Italy
| | - Michele Suman
- Barilla G.R. F.lli SpA, Advanced Laboratory Research, via Mantova 166, Parma, Italy
| | - Renato Bruni
- Department of Food and Drug, University of Parma, Viale delle Scienze 17/A, I-43124, Parma, Italy
| | - Chiara Dall'Asta
- Department of Food and Drug, University of Parma, Viale delle Scienze 17/A, I-43124, Parma, Italy.
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16
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Freire L, Guerreiro TM, Caramês ETS, Lopes LS, Orlando EA, Pereira GE, Lima Pallone JA, Catharino RR, Sant'Ana AS. Influence of Maturation Stages in Different Varieties of Wine Grapes ( Vitis vinifera) on the Production of Ochratoxin A and Its Modified Forms by Aspergillus carbonarius and Aspergillus niger. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:8824-8831. [PMID: 30048130 DOI: 10.1021/acs.jafc.8b02251] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ochratoxin A is the main contaminant mycotoxin of grapes produced mainly by Aspergillus niger and Aspergillus carbonarius. Besides, it is possible that the formation of modified mycotoxin occurs through the plant defense mechanism or also by fungus actions itself. The objective of this study was to evaluate the influence of grape variety and maturation stage on the formation of OTA and modified mycotoxin. The determination of OTA was performed by high-performance liquid chromatography, and a high-resolution mass spectrometry was used for the detection of modified ochratoxin. A positive correlation was observed between the following grapes physicochemical parameters: pH, total soluble solids, total glycosides in glucose, total anthocyanin, and OTA levels produced by A. niger and A. carbonarius. Therefore, the higher the concentrations of these parameters, the greater the production of mycotoxin in grapes. Among the elected targets, we identified the 14-decarboxy-ochratoxin A in Muscat Italia variety at veraison and 15 days after the beginning of veraison stages; and ethylamide-ochratoxin A as a biomarker in the Syrah variety at the ripeness stage.
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Affiliation(s)
- Luísa Freire
- Department of Food Science, Faculty of Food Engineering , University of Campinas , Campinas , SP , Brazil
| | - Tatiane M Guerreiro
- Innovare Biomarkers Laboratory, Faculty of Pharmaceutical Sciences , University of Campinas , Campinas , SP , Brazil
| | - Elem T S Caramês
- Department of Food Science, Faculty of Food Engineering , University of Campinas , Campinas , SP , Brazil
| | - Letícia S Lopes
- Department of Food Science, Faculty of Food Engineering , University of Campinas , Campinas , SP , Brazil
| | - Eduardo A Orlando
- Department of Food Science, Faculty of Food Engineering , University of Campinas , Campinas , SP , Brazil
| | - Giuliano E Pereira
- § Brazilian Agricultural Research Corporation (Semiárido) , Petrolina , PE , Brazil
| | - Juliana A Lima Pallone
- Department of Food Science, Faculty of Food Engineering , University of Campinas , Campinas , SP , Brazil
| | - Rodrigo R Catharino
- Innovare Biomarkers Laboratory, Faculty of Pharmaceutical Sciences , University of Campinas , Campinas , SP , Brazil
| | - Anderson S Sant'Ana
- Department of Food Science, Faculty of Food Engineering , University of Campinas , Campinas , SP , Brazil
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