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Naeem I, Ismail A, Riaz M, Aziz M, Akram K, Shahzad MA, Ameen M, Ali S, Oliveira CAF. Aflatoxins in the rice production chain: A review on prevalence, detection, and decontamination strategies. Food Res Int 2024; 188:114441. [PMID: 38823858 DOI: 10.1016/j.foodres.2024.114441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 04/01/2024] [Accepted: 04/27/2024] [Indexed: 06/03/2024]
Abstract
Rice (Oryza sativa L.) is one of the most consumed cereals that along with several important nutritional constituents typically provide more than 21% of the caloric requirements of human beings. Aflatoxins (AFs) are toxic secondary metabolites of several Aspergillus species that are prevalent in cereals, including rice. This review provides a comprehensive overview on production factors, prevalence, regulations, detection methods, and decontamination strategies for AFs in the rice production chain. The prevalence of AFs in rice is more prominent in African and Asian than in European countries. Developed nations have more stringent regulations for AFs in rice than in the developing world. The contamination level of AFs in the rice varied at different stages of rice production chain and is affected by production practices, environmental conditions comprising temperature, humidity, moisture, and water activity as well as milling operations such as de-husking, parboiling, and polishing. A range of methods including chromatographic techniques, immunochemical methods, and spectrophotometric methods have been developed, and used for monitoring AFs in rice. Chromatographic methods are the most used methods of AFs detection followed by immunochemical techniques. AFs decontamination strategies adopted worldwide involve various physical, chemical, and biological strategies, and even using plant materials. In conclusion, adopting good agricultural practices, implementing efficient AFs detection methods, and developing innovative aflatoxin decontamination strategies are imperative to ensure the safety and quality of rice for consumers.
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Affiliation(s)
- Iqra Naeem
- Department of Food Science & Technology, Faculty of Food Science & Nutrition, Bahauddin Zakariya University, Multan, Pakistan
| | - Amir Ismail
- Department of Food Safety and Quality Management, Faculty of Food Science & Nutrition, Bahauddin Zakariya University, Multan, Pakistan.
| | - Muhammad Riaz
- Department of Food Safety and Quality Management, Faculty of Food Science & Nutrition, Bahauddin Zakariya University, Multan, Pakistan
| | - Mubashir Aziz
- Department of Microbiology and Molecular Genetics, Bahauddin Zakariya University, Multan, Pakistan
| | - Kashif Akram
- Department of Food Science, Cholistan University of Veterinary and Animal Sciences, Bahawalpur, Pakistan
| | - Muhammad A Shahzad
- Department of Food Science & Technology, Faculty of Food Science & Nutrition, Bahauddin Zakariya University, Multan, Pakistan
| | - Mavra Ameen
- Department of Food Science & Technology, Faculty of Food Science & Nutrition, Bahauddin Zakariya University, Multan, Pakistan
| | - Sher Ali
- Department of Food Engineering, Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga, São Paulo, Brazil
| | - Carlos A F Oliveira
- Department of Food Engineering, Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga, São Paulo, Brazil.
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2
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Arimboor R. Metabolites and degradation pathways of microbial detoxification of aflatoxins: a review. Mycotoxin Res 2024; 40:71-83. [PMID: 38151634 DOI: 10.1007/s12550-023-00515-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 12/05/2023] [Accepted: 12/14/2023] [Indexed: 12/29/2023]
Abstract
The degradation of aflatoxins using nonpathogenic microbes and their enzymes is emerging as a safe and economical alternative to chemical and physical methods for the detoxification of aflatoxins in food and feeds. Many bacteria and fungi have been identified as aflatoxin degraders. This review is focused on the chemical identification of microbial degradation products and their degradation pathways. The microbial degradations of aflatoxins are initiated by oxidation, hydroxylation, reduction, or elimination reactions mostly catalyzed by various enzymes belonging to the classes of laccase, reductases, and peroxidases. The resulting products with lesser chemical stability further undergo various reactions to form low molecular weight products. Studies on the chemical and biological nature of degraded products of aflatoxins are necessary to ensure the safety of the decontamination process. This review indicated the need for an integrated approach including decontamination studies using culture media and food matrices, proper identification and toxicity profiling of degraded products of aflatoxins, and interactions of microbes and the degradation products with food matrices for developing practical and effective microbial detoxification process.
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Affiliation(s)
- Ranjith Arimboor
- Spices Board Quality Evaluation Laboratory, SIPCOT, Gummidipoondi, Chennai, 601201, India.
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3
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Heidari F, Øverland M, Hansen JØ, Mydland LT, Urriola PE, Chen C, Shurson GC, Hu B. Solid-state fermentation of Pleurotus ostreatus to improve the nutritional profile of mechanically-fractionated canola meal. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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4
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Wang L, Huang W, Shen Y, Zhao Y, Wu D, Yin H, Yang S, Yuan Q, Liang W, Wang J. Enhancing the degradation of Aflatoxin B 1 by co-cultivation of two fungi strains with the improved production of detoxifying enzymes. Food Chem 2022; 371:131092. [PMID: 34543924 DOI: 10.1016/j.foodchem.2021.131092] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 09/02/2021] [Accepted: 09/06/2021] [Indexed: 01/08/2023]
Abstract
After the co-culture of Aspergillus niger and Pleurotus ostreatus, the obtained extracellular crude enzymes solution was employed to aflatoxin B1 (AFB1) degradation. The maximum AFB1 degradation with co-culture reached 93.4%, which increased by 65.9% and 37.6%, respectively, compared with those of the mono-culture of Pleurotus ostreatus and Aspergillus niger. The molecular weight of the key detoxifying enzymes isolated by ultrafiltration was 58 and 63 kDa by SDS-PAGE analysis. The purified detoxifying enzymes had a high detoxification effect on AFB1 with the degradation rate of 94.7%. It was found that the co-culture of Pleurotus ostreatus and Aspergillus niger promoted the production of 58 and 63 kDa detoxifying enzymes to enhance the AFB1 degradation. The chemical structure of major degradation products of AFB1 by the mixed cultures were preliminarily identified by LC-Triple TOF MS. Two pathways of AFB1 degradation were inferred with the high potential of fungal co-cultivations for AFB1 detoxification applications.
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Affiliation(s)
- Le Wang
- College of Biological Engineering, National Engineering Laboratory for Wheat & Corn Further Processing, Henan University of Technology, 450001 Zhengzhou, China
| | - Wei Huang
- College of Biological Engineering, National Engineering Laboratory for Wheat & Corn Further Processing, Henan University of Technology, 450001 Zhengzhou, China
| | - Yan Shen
- College of Biological Engineering, National Engineering Laboratory for Wheat & Corn Further Processing, Henan University of Technology, 450001 Zhengzhou, China
| | - Yawei Zhao
- College of Biological Engineering, National Engineering Laboratory for Wheat & Corn Further Processing, Henan University of Technology, 450001 Zhengzhou, China
| | - Dapeng Wu
- School of Environment, Henan Normal University, 453001 Xinxiang, China.
| | - Haicheng Yin
- College of Biological Engineering, National Engineering Laboratory for Wheat & Corn Further Processing, Henan University of Technology, 450001 Zhengzhou, China
| | - Shuoye Yang
- College of Biological Engineering, National Engineering Laboratory for Wheat & Corn Further Processing, Henan University of Technology, 450001 Zhengzhou, China
| | - Qipeng Yuan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Wenhui Liang
- College of Biological Engineering, National Engineering Laboratory for Wheat & Corn Further Processing, Henan University of Technology, 450001 Zhengzhou, China
| | - Jinshui Wang
- College of Biological Engineering, National Engineering Laboratory for Wheat & Corn Further Processing, Henan University of Technology, 450001 Zhengzhou, China.
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5
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A Systematic Review of the Efficacy of Interventions to Control Aflatoxins in the Dairy Production Chain—Feed Production and Animal Feeding Interventions. Toxins (Basel) 2022; 14:toxins14020115. [PMID: 35202142 PMCID: PMC8878089 DOI: 10.3390/toxins14020115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 01/18/2022] [Accepted: 01/31/2022] [Indexed: 12/04/2022] Open
Abstract
The study presents a systematic review of published scientific articles investigating the effects of interventions aiming at aflatoxin reduction at the feed production and animal feeding phases of the milk value chain in order to identify the recent scientific trends and summarize the main findings available in the literature. The review strategy was designed based on the guidance of the systematic review and knowledge synthesis methodology that is applicable in the field of food safety. The Web of Science and EBSCOhost online databases were searched with predefined algorithms. After title and abstract relevance screening and relevance confirmation with full-text screening, 67 studies remained for data extraction, which were included in the review. The most important identified groups of interventions based on their mode of action and place in the technological process are as follows: low-moisture production using preservatives, acidity regulators, adsorbents and various microbiological additives. The results of the listed publications are summarized and compared for all the identified intervention groups. The paper aimed to help feed producers, farmers and relevant stakeholders to get an overview of the most suitable aflatoxin mitigation options, which is extremely important in the near future as climate change will likely be accompanied by elevated mycotoxin levels.
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Zhen Y, Wang M, Gu Y, Yu X, Shahzad K, Xu J, Gong Y, Li P, Loor JJ. Biosorption of Copper in Swine Manure Using Aspergillus and Yeast: Characterization and Its Microbial Diversity Study. Front Microbiol 2021; 12:687533. [PMID: 34475858 PMCID: PMC8406632 DOI: 10.3389/fmicb.2021.687533] [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: 03/29/2021] [Accepted: 07/19/2021] [Indexed: 01/10/2023] Open
Abstract
Dietary copper supplementation in the feed of piglets generally exceeds 250-800 mg/kg, where a higher quantity (>250 mg/kg) can promote growth and improve feed conversion. Despite the reported positive effects, 90% of copper is excreted and can accumulate and pollute the soil. Data indicate that fungi have a biosorptive capacity for copper. Thus, the objectives of the present experiment were to study the effects of adding different strains of fungi on the biosorptive capacity for copper in swine manure and to evaluate potential effects on microbiota profiles. Aspergillus niger (AN), Aspergillus oryzae (AO), and Saccharomyces cerevisiae (SC) were selected, and each added 0.4% into swine manure, which contain 250 mg/kg of copper. The incubations lasted for 29 days, and biosorption parameters were analyzed on the 8th (D8), 15th (D15), 22nd (D22), and 29th (D29) day. Results showed that after biosorption, temperature was 18.47-18.77°C; pH was 6.33-6.91; and content of aflatoxin B1, ochratoxin A, and deoxynivalenol were low. In addition, residual copper concentration with AN was the lowest on D15, D22, and D29. The copper biosorption rate was also highest with AN, averaging 84.85% on D29. Biosorption values for AO reached 81.12% and for SC were lower than 80%. Illumina sequencing of 16S and ITS rRNA gene revealed that fungal treatments reduced the diversity and richness of fungal abundance, but had no effect on bacterial abundance. Unknown_Marinilabiliaceae, Proteiniphilum, Tissierella, and Curvibacter were the dominant bacteria, while Aspergillus and Trichoderma were the dominant fungi. However, the added strain of S. cerevisiae was observed to be lower than the dominant fungi, which contained less than 0.05%. The Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment predicted via PICRUSt2 that there were bacterial genes potentially related to various aspects of metabolism and environmental information processing. Overall, data indicated that Aspergillus can provide microbial materials for adsorption of copper.
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Affiliation(s)
- Yongkang Zhen
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Mengzhi Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
- State Key Laboratory of Sheep Genetic Improvement and Healthy Production, Xinjiang Academy of Agricultural and Reclamation Sciences, Shihezi, China
| | - Yalan Gu
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Xiang Yu
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Khuram Shahzad
- Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
| | - Jun Xu
- Institute for Quality and Safety and Standards of Agricultural Products Research, Jiangxi Academy of Agricultural Sciences, Nanchang, China
| | - Yuqing Gong
- Jiangsu Provincial Station of Animal Husbandry, Nanjing, China
| | - Peizhen Li
- Jiangsu Provincial Station of Animal Husbandry, Nanjing, China
| | - Juan J Loor
- Mammalian Nutrition Physiology Genomics, Division of Nutritional Sciences, Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
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Zhuo R, Fan F. A comprehensive insight into the application of white rot fungi and their lignocellulolytic enzymes in the removal of organic pollutants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 778:146132. [PMID: 33714829 DOI: 10.1016/j.scitotenv.2021.146132] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 02/19/2021] [Accepted: 02/22/2021] [Indexed: 05/14/2023]
Abstract
Environmental problems resultant from organic pollutants are a major current challenge for modern societies. White rot fungi (WRF) are well known for their extensive organic compound degradation abilities. The unique oxidative and extracellular ligninolytic systems of WRF that exhibit low substrate specificity, enable them to display a considerable ability to transform or degrade different environmental contaminants. In recent decades, WRF and their ligninolytic enzymes have been widely applied in the removal of polycyclic aromatic hydrocarbons (PAHs), pharmaceutically active compounds (PhACs), endocrine disruptor compounds (EDCs), pesticides, synthetic dyes, and other environmental pollutants, wherein promising results have been achieved. This review focuses on advances in WRF-based bioremediation of organic pollutants over the last 10 years. We comprehensively document the application of WRF and their lignocellulolytic enzymes for removing organic pollutants. Moreover, potential problems and intriguing observations that are worthy of additional research attention are highlighted. Lastly, we discuss trends in WRF-remediation system development and avenues that should be considered to advance research in the field.
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Affiliation(s)
- Rui Zhuo
- Institute of Plant and Microbiology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha 410082, China.
| | - Fangfang Fan
- Harvard Medical School, Harvard University, Boston, MA 02115, USA.
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8
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Jiang Y, Ogunade IM, Vyas D, Adesogan AT. Aflatoxin in Dairy Cows: Toxicity, Occurrence in Feedstuffs and Milk and Dietary Mitigation Strategies. Toxins (Basel) 2021; 13:toxins13040283. [PMID: 33920591 PMCID: PMC8074160 DOI: 10.3390/toxins13040283] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 04/02/2021] [Accepted: 04/07/2021] [Indexed: 11/16/2022] Open
Abstract
Aflatoxins are poisonous carcinogens produced by fungi, mainly Aspergillus flavus and Aspergillus parasiticus. Aflatoxins can contaminate a variety of livestock feeds and cause enormous economic losses, estimated at between US$52.1 and US$1.68 billion annually for the U.S. corn industry alone. In addition, aflatoxin can be transferred from the diet to the milk of cows as aflatoxin M1 (AFM1), posing a significant human health hazard. In dairy cows, sheep and goats, chronic exposure to dietary aflatoxin can reduce milk production, impair reproduction and liver function, compromise immune function, and increase susceptibility to diseases; hence, strategies to lower aflatoxin contamination of feeds and to prevent or reduce the transfer of the toxin to milk are required for safeguarding animal and human health and improving the safety of dairy products and profitability of the dairy industry. This article provides an overview of the toxicity of aflatoxin to ruminant livestock, its occurrence in livestock feeds, and the effectiveness of different strategies for preventing and mitigating aflatoxin contamination of feeds.
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Affiliation(s)
- Yun Jiang
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611, USA; (Y.J.); (D.V.)
| | - Ibukun M. Ogunade
- Division of Animal and Nutritional Science, West Virginia University, Morgantown, WV 26506, USA;
| | - Diwakar Vyas
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611, USA; (Y.J.); (D.V.)
| | - Adegbola T. Adesogan
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611, USA; (Y.J.); (D.V.)
- Correspondence:
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9
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Guo HW, Chang J, Wang P, Yin QQ, Liu CQ, Xu XX, Dang XW, Hu XF, Wang QL. Effects of compound probiotics and aflatoxin-degradation enzyme on alleviating aflatoxin-induced cytotoxicity in chicken embryo primary intestinal epithelium, liver and kidney cells. AMB Express 2021; 11:35. [PMID: 33646441 PMCID: PMC7921234 DOI: 10.1186/s13568-021-01196-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 02/18/2021] [Indexed: 02/06/2023] Open
Abstract
Aflatoxin B1 (AFB1) is one of the most dangerous mycotoxins for humans and animals. This study aimed to investigate the effects of compound probiotics (CP), CP supernatant (CPS), AFB1-degradation enzyme (ADE) on chicken embryo primary intestinal epithelium, liver and kidney cell viabilities, and to determine the functions of CP + ADE (CPADE) or CPS + ADE (CPSADE) for alleviating cytotoxicity induced by AFB1. The results showed that AFB1 decreased cell viabilities in dose-dependent and time-dependent manners. The optimal AFB1 concentrations and reactive time for establishing cell damage models were 200 µg/L AFB1 and 12 h for intestinal epithelium cells, 40 µg/L and 12 h for liver and kidney cells. Cell viabilities reached 231.58% (p < 0.05) for intestinal epithelium cells with CP addition, 105.29% and 115.84% (p < 0.05) for kidney and liver cells with CPS additions. The further results showed that intestinal epithelium, liver and kidney cell viabilities were significantly decreased to 87.12%, 88.7% and 84.19% (p < 0.05) when the cells were exposed to AFB1; however, they were increased to 93.49% by CPADE addition, 102.33% and 94.71% by CPSADE additions (p < 0.05). The relative mRNA abundances of IL-6, IL-8, TNF-α, iNOS, NF-κB, NOD1 (except liver cell) and TLR2 in three kinds of primary cells were significantly down-regulated by CPADE or CPSADE addition, compared with single AFB1 group (p < 0.05), indicating that CPADE or CPSADE addition could alleviate cell cytotoxicity and inflammation induced by AFB1 exposure through suppressing the activations of NF-κB, iNOS, NOD1 and TLR2 pathways.
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Affiliation(s)
- Hong-Wei Guo
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China
| | - Juan Chang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China.
| | - Ping Wang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China
| | - Qing-Qiang Yin
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China.
| | - Chao-Qi Liu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China
| | - Xiao-Xiang Xu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China
| | - Xiao-Wei Dang
- Henan Delin Biological Product Co., Ltd, Xinxiang, 453000, China
| | - Xiao-Fei Hu
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Quan-Liang Wang
- Henan Guangan Biotechnological Co., Ltd., Zhengzhou, 450001, China
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Abstract
Several food commodities can be infected by filamentous fungi, both in the field and during storage. Some of these fungi, under appropriate conditions, are capable of producing a wide range of secondary metabolites, including mycotoxins, which may resist food processing and arise in the final feed and food products. Contamination of these products with mycotoxins still occurs very often and that is why research in this area is valuable and still evolving. The best way to avoid contamination is prevention; however, when it is not possible, remediation is the solution. Enzymatic biodegradation of mycotoxins is a green solution for removal of these compounds that has attracted growing interest over recent years. Due to their ability to detoxify a wide variety of recalcitrant pollutants, laccases have received a lot of attention. Laccases are multi-copper proteins that use molecular oxygen to oxidise various aromatic and non-aromatic compounds, by a radical-catalysed reaction mechanism. Being non-specific, they are capable of degrading a wide range of compounds and the radical species formed can evolve towards both synthetic and degradative processes. The present review provides an overview of structural features, biological functions and catalytic mechanisms of laccases. The utilisation of laccases for mycotoxin degradation is reviewed, as well as shortcomings and future needs related with the use of laccases for mycotoxin decontamination from food and feed.
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Affiliation(s)
- A.C. Cabral Silva
- CEB – Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
| | - A. Venâncio
- CEB – Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
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Garai E, Risa A, Varga E, Cserháti M, Kriszt B, Urbányi B, Csenki Z. Evaluation of the Multimycotoxin-Degrading Efficiency of Rhodococcus erythropolis NI1 Strain with the Three-Step Zebrafish Microinjection Method. Int J Mol Sci 2021; 22:ijms22020724. [PMID: 33450918 PMCID: PMC7828439 DOI: 10.3390/ijms22020724] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/08/2021] [Accepted: 01/11/2021] [Indexed: 12/13/2022] Open
Abstract
The multimycotoxin-degrading efficiency of the Rhodococcus erythropolis NI1 strain was investigated with a previously developed three-step method. NI1 bacterial metabolites, single and combined mycotoxins and their NI1 degradation products, were injected into one cell stage zebrafish embryos in the same doses. Toxic and interaction effects were supplemented with UHPLC-MS/MS measurement of toxin concentrations. Results showed that the NI1 strain was able to degrade mycotoxins and their mixtures in different proportions, where a higher ratio of mycotoxins were reduced in combination than single ones. The NI1 strain reduced the toxic effects of mycotoxins and mixtures, except for the AFB1+T-2 mixture. Degradation products of the AFB1+T-2 mixture by the NI1 strain were more toxic than the initial AFB1+T-2 mixture, while the analytical results showed very high degradation, which means that the NI1 strain degraded this mixture to toxic degradation products. The NI1 strain was able to detoxify the AFB1, ZEN, T-2 toxins and mixtures (except for AFB1+T-2 mixture) during the degradation experiments, which means that the NI1 strain degraded these to non-toxic degradation products. The results demonstrate that single exposures of mycotoxins were very toxic. The combined exposure of mycotoxins had synergistic effects, except for ZEN+T-2 and AFB1+ZEN +T-2, whose mixtures had very strong antagonistic effects.
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Affiliation(s)
- Edina Garai
- Department of Aquaculture, Institute for Conservation of Natural Resources, Faculty of Agricultural and Environmental Sciences, Szent István University, H-2100 Gödöllő, Hungary; (E.G.); (B.U.)
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-2100 Gödöllő, Hungary; (A.R.); (M.C.); (B.K.)
| | - Anita Risa
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-2100 Gödöllő, Hungary; (A.R.); (M.C.); (B.K.)
- Department of Environmental Safety and Ecotoxicology, Institute for Conservation of Natural Resources, Faculty of Agricultural and Environmental Sciences, Szent István University, H-2100 Gödöllő, Hungary
| | - Emese Varga
- Department of Applied Chemistry, Faculty of Food Science, Szent István University, H-1118 Budapest, Hungary;
| | - Mátyás Cserháti
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-2100 Gödöllő, Hungary; (A.R.); (M.C.); (B.K.)
- Department of Environmental Safety and Ecotoxicology, Institute for Conservation of Natural Resources, Faculty of Agricultural and Environmental Sciences, Szent István University, H-2100 Gödöllő, Hungary
| | - Balázs Kriszt
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-2100 Gödöllő, Hungary; (A.R.); (M.C.); (B.K.)
- Department of Environmental Safety and Ecotoxicology, Institute for Conservation of Natural Resources, Faculty of Agricultural and Environmental Sciences, Szent István University, H-2100 Gödöllő, Hungary
| | - Béla Urbányi
- Department of Aquaculture, Institute for Conservation of Natural Resources, Faculty of Agricultural and Environmental Sciences, Szent István University, H-2100 Gödöllő, Hungary; (E.G.); (B.U.)
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-2100 Gödöllő, Hungary; (A.R.); (M.C.); (B.K.)
| | - Zsolt Csenki
- Department of Aquaculture, Institute for Conservation of Natural Resources, Faculty of Agricultural and Environmental Sciences, Szent István University, H-2100 Gödöllő, Hungary; (E.G.); (B.U.)
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-2100 Gödöllő, Hungary; (A.R.); (M.C.); (B.K.)
- Correspondence:
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12
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Guo Y, Zhao L, Ma Q, Ji C. Novel strategies for degradation of aflatoxins in food and feed: A review. Food Res Int 2020; 140:109878. [PMID: 33648196 DOI: 10.1016/j.foodres.2020.109878] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 10/31/2020] [Accepted: 11/01/2020] [Indexed: 02/06/2023]
Abstract
Aflatoxins are toxic secondary metabolites mainly produced by Aspergillus fungi, posing high carcinogenic potency in humans and animals. Dietary exposure to aflatoxins is a global problem in both developed and developing countries especially where there is poor regulation of their levels in food and feed. Thus, academics have been striving over the decades to develop effective strategies for degrading aflatoxins in food and feed. These strategies are technologically diverse and based on physical, chemical, or biological principles. This review summarizes the recent progress on novel aflatoxin degradation strategies including irradiation, cold plasma, ozone, electrolyzed oxidizing water, organic acids, natural plant extracts, microorganisms and enzymes. A clear understanding of the detoxification efficiency, mechanism of action, degradation products, application potential and current limitations of these methods is presented. In addition, the development and future perspective of nanozymes in aflatoxins degradation are introduced.
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Affiliation(s)
- Yongpeng Guo
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, PR China.
| | - Lihong Zhao
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, PR China.
| | - Qiugang Ma
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, PR China.
| | - Cheng Ji
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, PR China.
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Söylemez T, Yamaç M, Yıldız Z. Statistical optimization of cultural variables for enzymatic degradation of aflatoxin B 1 by Panus neostrigosus. Toxicon 2020; 186:141-150. [PMID: 32795459 DOI: 10.1016/j.toxicon.2020.08.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 07/07/2020] [Accepted: 08/04/2020] [Indexed: 02/06/2023]
Abstract
The aim of this study is to determine the best aflatoxin B1 degradation conditions which was optimized using a combination of the Plackett-Burman and Box-Behnken methods with Panus neostrigosus culture filtrate. Panus neostrigosus was grown in a modified Kirk Broth medium to determine optimal degradation conditions. As a result, aflatoxin B1 was degraded under varying culture conditions. The Plackett-Burman method was designed after sixteen different experiments with fifteen variables. The three most effective variables (Sucrose, yeast extract, wheat bran) were chosen for the Box-Behnken methodology. The aflatoxin B1 degradation rate was 49% in just 1 h exposure to culture filtrate which was obtained under optimal growth conditions; (g-ml/L) sucrose 10, yeast extract 3, wheat bran 3, soytone 5, KH2PO4 2, MgSO4.7H2O 0.5, CaCl2.H2O 0.1, ammonium tartrate 2, trace element solution 10; 28 °C of incubation temperature, medium pH 5, 7.5% inoculum rate, 125 rpm of agitation speed, and a twelve-day incubation period. The SDS-PAGE studies show that the enzyme responsible for AFB1 degradation has 38 kDa molecular weight and has no laccase or MnP activity. To the best of our knowledge, this is the first report for AFB1 degradation by Panus neostrigosus.
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Affiliation(s)
- Tuncay Söylemez
- Savaş Kubaş Anatolian High School, 26050, Eskişehir, Turkey.
| | - Mustafa Yamaç
- Eskisehir Osmangazi University, Faculty of Science and Letters, Department of Biology, 26480, Eskisehir, Turkey
| | - Zeki Yıldız
- Eskisehir Osmangazi University, Faculty of Science and Letters, Department of Statistics, 26480, Eskisehir, Turkey
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14
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Abdi M, Asadi A, Maleki F, Kouhsari E, Fattahi A, Ohadi E, Lotfali E, Ahmadi A, Ghafouri Z. Microbiological Detoxification of Mycotoxins: Focus on Mechanisms and Advances. Infect Disord Drug Targets 2020; 21:339-357. [PMID: 32543365 DOI: 10.2174/1871526520666200616145150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 04/10/2020] [Accepted: 04/10/2020] [Indexed: 11/22/2022]
Abstract
Some fungal species of the genera Aspergillus, Penicillium, and Fusarium secretes toxic metabolites known as mycotoxins, have become a global concern that is toxic to different species of animals and humans. Biological mycotoxins detoxification has been studied by researchers around the world as a new strategy for mycotoxin removal. Bacteria, fungi, yeast, molds, and protozoa are the main living organisms appropriate for the mycotoxin detoxification. Enzymatic and degradation sorptions are the main mechanisms involved in microbiological detoxification of mycotoxins. Regardless of the method used, proper management tools that consist of before-harvest prevention and after-harvest detoxification are required. Here, in this review, we focus on the microbiological detoxification and mechanisms involved in the decontamination of mycotoxins.
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Affiliation(s)
- Milad Abdi
- Department of Microbiology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Arezoo Asadi
- Department of Microbiology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Farajolah Maleki
- Department of Laboratory Sciences, School of Allied Medical Sciences, Ilam University of Medical sciences, Ilam, Iran
| | - Ebrahim Kouhsari
- Laboratory Sciences Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Azam Fattahi
- Center for Research and Training in Skin Disease and Leprosy, Tehran University of Medical Sciences, Tehran, Iran
| | - Elnaz Ohadi
- Department of Microbiology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Ensieh Lotfali
- Department of Medical Parasitology and Mycology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Alireza Ahmadi
- Laboratory Sciences Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Zahra Ghafouri
- Department of Biochemistry, Biophysics and Genetics, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
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15
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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: 65] [Impact Index Per Article: 16.3] [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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16
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Wang L, Wu J, Liu Z, Shi Y, Liu J, Xu X, Hao S, Mu P, Deng F, Deng Y. Aflatoxin B 1 Degradation and Detoxification by Escherichia coli CG1061 Isolated From Chicken Cecum. Front Pharmacol 2019; 9:1548. [PMID: 30705630 PMCID: PMC6344451 DOI: 10.3389/fphar.2018.01548] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Accepted: 12/18/2018] [Indexed: 12/21/2022] Open
Abstract
Aflatoxin B1 (AFB1) is one of the most hazardous mycotoxins contamination in food and feed products, which leads to hepatocellular carcinoma in humans and animals. In the present study, we isolated and characterized an AFB1 degrading bacteria CG1061 from chicken cecum, exhibited an 93.7% AFB1 degradation rate by HPLC. 16S rRNA gene sequence analysis and a multiplex PCR experiment demonstrated that CG1061 was a non-pathogenic Escherichia coli. The culture supernatant of E. coli CG1061 showed an 61.8% degradation rate, whereas the degradation rates produced by the intracellular extracts was only 17.6%, indicating that the active component was constitutively secreted into the extracellular space. The degradation rate decreased from 61.8 to 37.5% when the culture supernatant was treated with 1 mg/mL proteinase K, and remained 51.3% when that treated with 100°C for 20 min. We postulated that AFB1 degradation was mediated by heat-resistant proteins. The content of AFB1 decreased rapidly when it was incubated with the culture supernatant during the first 24 h. The optimal incubation pH and temperature were pH 8.5 and 55°C respectively. According to the UPLC Q-TOF MS analysis, AFB1 was bio-transformed to the product C16H14O5 and other metabolites. Based on the results of in vitro experiments on chicken hepatocellular carcinoma (LMH) cells and in vivo experiments on mice, we confirmed that CG1061-degraded AFB1 are less toxic than the standard AFB1. E. coli CG1061 isolated from healthy chicken cerum is more likely to colonize the animal gut, which might be an excellent candidate for the detoxification of AFB1 in food and feed industry.
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Affiliation(s)
- Lingling Wang
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis of Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou, China
| | - Jun Wu
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis of Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou, China
| | - Zhiwen Liu
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Yutao Shi
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Jinqiu Liu
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Xiaofan Xu
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Shuxian Hao
- South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - Peiqiang Mu
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis of Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou, China
| | - Fengru Deng
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis of Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou, China
| | - Yiqun Deng
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis of Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou, China
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17
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Simultaneous degradation of aflatoxin B 1 and zearalenone by a microbial consortium. Toxicon 2018; 146:69-76. [PMID: 29621525 DOI: 10.1016/j.toxicon.2018.04.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 03/01/2018] [Accepted: 04/01/2018] [Indexed: 11/21/2022]
Abstract
Mycotoxins are toxic secondary metabolites mainly produced by filamentous fungal species that commonly contaminate staple foods and feeds. They cause significant economic losses and greatly harm food security. Simultaneous contamination of multiple mycotoxins and the accompanying additive and synergistic effects may cause even more serious harm. To develop a microbial consortium with the ability to degrade multiple mycotoxins, a previously identified consortium with aflatoxin B1 (AFB1) degradation ability, TADC7, was domesticated by co-culturing with 500 μg l-1 AFB1 and 500 μg l-1 zearalenone (ZEA), yielding the derived microbial consortium TMDC. After 168 h of co-culture with TMDC, 2000 μg l-1AFB1 and 2000 μg l-1 ZEA were degraded by 98.9% and 88.5%, respectively. The proteins or enzymes in the TADC7 cell-free supernatant played a major role in mycotoxins degradation. The degradation ratios of 5000 μg l-1 AFB1 and 5000 μg l-1 ZEA by 48 h TMDC cell-free supernatant were 93.8% and 90.3% at 72 h, respectively. Based on 16S rRNA sequencing, Geobacillus and Tepidimicrobium might play important roles in mycotoxin degradation by TMDC, and the TMDC community composition was stable, irrespective of mycotoxin. This study established the biodegradation of different categories of mycotoxins, and will facilitate the practical application of microbial consortia in mycotoxin degradation.
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18
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Adebo OA, Njobeh PB, Gbashi S, Nwinyi OC, Mavumengwana V. Review on microbial degradation of aflatoxins. Crit Rev Food Sci Nutr 2018; 57:3208-3217. [PMID: 26517507 DOI: 10.1080/10408398.2015.1106440] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Aflatoxin (AF) contamination presents one of the most insidious challenges to combat, in food safety. Its adulteration of agricultural commodities presents an important safety concern as evident in the incidences of its health implication and economic losses reported widely. Due to the overarching challenges presented by the contamination of AFs in foods and feeds, there is an urgent need to evolve cost-effective and competent strategies to combat this menace. In our review, we tried to appraise the cost-effective methods for decontamination of AFs. We identified the missing links in adopting microbial degradation as a palliative to decontamination of AFs and its commercialization in food and feed industries. Cogent areas of further research were also highlighted in the review paper.
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Affiliation(s)
- O A Adebo
- a Department of Biotechnology and Food Technology, Faculty of Science , University of Johannesburg , Doornfontein Campus, Johannesburg , South Africa
| | - P B Njobeh
- a Department of Biotechnology and Food Technology, Faculty of Science , University of Johannesburg , Doornfontein Campus, Johannesburg , South Africa
| | - S Gbashi
- a Department of Biotechnology and Food Technology, Faculty of Science , University of Johannesburg , Doornfontein Campus, Johannesburg , South Africa
| | - O C Nwinyi
- a Department of Biotechnology and Food Technology, Faculty of Science , University of Johannesburg , Doornfontein Campus, Johannesburg , South Africa.,b Department of Biological Sciences, School of Natural and Applied Sciences , College of Science and Technology, Covenant University , Canaan Land, Ota , Ogun State , Nigeria
| | - V Mavumengwana
- a Department of Biotechnology and Food Technology, Faculty of Science , University of Johannesburg , Doornfontein Campus, Johannesburg , South Africa
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19
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Jackson LW, Pryor BM. Degradation of aflatoxin B 1 from naturally contaminated maize using the edible fungus Pleurotus ostreatus. AMB Express 2017; 7:110. [PMID: 28582971 PMCID: PMC5457385 DOI: 10.1186/s13568-017-0415-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 05/26/2017] [Indexed: 11/13/2022] Open
Abstract
Aflatoxins are highly carcinogenic secondary metabolites that can contaminate approximately 25% of crops and that cause or exacerbate multiple adverse health conditions, especially in Sub-Saharan Africa and South and Southeast Asia. Regulation and decontamination of aflatoxins in high exposure areas is lacking. Biological detoxification methods are promising because they are assumed to be cheaper and more environmentally friendly compared to chemical alternatives. White-rot fungi produce non-specific enzymes that are known to degrade aflatoxin in in situ and ex situ experiments. The aims of this study were to (1) decontaminate aflatoxin B1 (AFB1) in naturally contaminated maize with the edible, white-rot fungus Pleurotus ostreatus (oyster mushroom) using a solid-state fermentation system that followed standard cultivation techniques, and to (2) and to assess the risk of mutagenicity in the resulting breakdown products and mushrooms. Vegetative growth and yield characteristics of P. ostreatus were not inhibited by the presence of AFB1. AFB1 was degraded by up to 94% by the Blue strain. No aflatoxin could be detected in P. ostreatus mushrooms produced from AFB1-contaminated maize. Moreover, the mutagenicity of breakdown products from the maize substrate, and reversion of breakdown products to the parent compound, were minimal. These results suggest that P. ostreatus significantly degrades AFB1 in naturally contaminated maize under standard cultivation techniques to levels that are acceptable for some livestock fodder, and that using P. ostreatus to bioconvert crops into mushrooms can reduce AFB1-related losses.
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20
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Zhu Y, Hassan YI, Lepp D, Shao S, Zhou T. Strategies and Methodologies for Developing Microbial Detoxification Systems to Mitigate Mycotoxins. Toxins (Basel) 2017; 9:E130. [PMID: 28387743 PMCID: PMC5408204 DOI: 10.3390/toxins9040130] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 04/03/2017] [Accepted: 04/04/2017] [Indexed: 02/01/2023] Open
Abstract
Mycotoxins, the secondary metabolites of mycotoxigenic fungi, have been found in almost all agricultural commodities worldwide, causing enormous economic losses in livestock production and severe human health problems. Compared to traditional physical adsorption and chemical reactions, interest in biological detoxification methods that are environmentally sound, safe and highly efficient has seen a significant increase in recent years. However, researchers in this field have been facing tremendous unexpected challenges and are eager to find solutions. This review summarizes and assesses the research strategies and methodologies in each phase of the development of microbiological solutions for mycotoxin mitigation. These include screening of functional microbial consortia from natural samples, isolation and identification of single colonies with biotransformation activity, investigation of the physiological characteristics of isolated strains, identification and assessment of the toxicities of biotransformation products, purification of functional enzymes and the application of mycotoxin decontamination to feed/food production. A full understanding and appropriate application of this tool box should be helpful towards the development of novel microbiological solutions on mycotoxin detoxification.
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Affiliation(s)
- Yan Zhu
- Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON N1G5C9, Canada.
| | - Yousef I Hassan
- Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON N1G5C9, Canada.
| | - Dion Lepp
- Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON N1G5C9, Canada.
| | - Suqin Shao
- Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON N1G5C9, Canada.
| | - Ting Zhou
- Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON N1G5C9, Canada.
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21
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Wang C, Li Z, Wang H, Qiu H, Zhang M, Li S, Luo X, Song Y, Zhou H, Ma W, Zhang T. Rapid biodegradation of aflatoxin B1 by metabolites of Fusarium sp. WCQ3361 with broad working temperature range and excellent thermostability. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2017; 97:1342-1348. [PMID: 27381716 DOI: 10.1002/jsfa.7872] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 06/20/2016] [Accepted: 06/20/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Contamination of food and feed by aflatoxin B1 (AFB1) poses serious economic and health problems worldwide, so the development of biological methods for effective AFB1 degradation is strongly required. RESULTS Among three AFB1-degrading microorganisms isolated from moldy peanut, Fusarium sp. WCQ3361 could remove AFB1 extremely effectively, with a degradation ratio of 70.20% after 1 min and 95.38% after 24 h. Its degradation ratio was not much affected by temperature change (0-90 °C) and it also displayed excellent thermostability, maintaining 99.40% residual activity after boiling for 10 min. Since protease K could reduce the AFB1 degradation ratio by 55.15%, it is proposed that the effective component for AFB1 degradation is a protein. The AFB1 degradation ability of Fusarium sp. WCQ3361 was further verified by feed stock detoxification and the MTT test with HepG2 cells. In addition, no degradation products were detected by preliminary liquid chromatography/mass spectrometry, suggesting that AFB1 might be metabolized to products with different chemical characteristics from AFB1. CONCLUSION Fusarium sp. WCQ3361 is the first reported AFB1 degradation fungus belonging to the genus Fusarium with broad working temperature range, excellent thermostability and high activity, which provides a potential highly useful solution for dealing with AFB1 contamination in the human diet and animal feed. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Cuiqiong Wang
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Zhongyuan Li
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Hui Wang
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Haiyan Qiu
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Minghui Zhang
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Shuang Li
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Xuegang Luo
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Yajian Song
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Hao Zhou
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Wenjian Ma
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Tongcun Zhang
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China
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22
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Kim S, Lee H, Lee S, Lee J, Ha J, Choi Y, Yoon Y, Choi KH. Invited review: Microbe-mediated aflatoxin decontamination of dairy products and feeds. J Dairy Sci 2017; 100:871-880. [DOI: 10.3168/jds.2016-11264] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Accepted: 09/09/2016] [Indexed: 11/19/2022]
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23
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Das A, Bhattacharya S, Panchanan G, Navya B, Nambiar P. Production, characterization and Congo red dye decolourizing efficiency of a laccase from Pleurotus ostreatus MTCC 142 cultivated on co-substrates of paddy straw and corn husk. J Genet Eng Biotechnol 2016; 14:281-288. [PMID: 30647626 PMCID: PMC6299867 DOI: 10.1016/j.jgeb.2016.09.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Revised: 09/06/2016] [Accepted: 09/20/2016] [Indexed: 11/28/2022]
Abstract
A laccase produced by Pleurotus ostreatus MTCC 142 under solid-state fermentation using co-substrates of paddy straw and corn husk (1.5:1.5, g w/w) showed an activity of 2.54 U gds-1. Laccase activity was determined spectrophotometrically using 0.5 mM 2,2'- azino-bis (3-ethylbenzthiazoline-6-sulphonic acid) (ABTS). Supplementation with fructose and potassium nitrate resulted in maximum enzyme production at initial pH 5.8 ± 0.2 and initial moisture content of 70%. A carbon: nitrogen ratio of 0.5:0.1 yielded highest laccase activity in the presence of surfactant Tween 20 (0.05%, w/v). Incorporation of vanillin (5 mM) and copper sulphate (10 mM) facilitated enhanced synthesis of laccase. A 4.8-fold increase in enzyme activity was recorded after optimization of nutritional parameters. The apparent molecular mass of this enzyme was revealed as 43 kDa by sodium dodecyl sulphate-polyacrylamide gel electrophoresis. The laccase showed optimal activity at pH 3 and 35 °C with 82.8% residual activity after 1 h of incubation. The K m and V max values on ABTS were found to be 0.52 mM and 9.33 U gds-1, respectively. The enzyme activity was enhanced by Cu2+ and remained unaffected with Ba2+, Mn2+, Pb2+, Mg2+, Ca2+ and Fe3+. However, pre-incubation of the enzyme with reagents like sodium azide, sodium lauryl sulphate and 2-mercaptoethanol demonstrated an inhibition of its activity. Addition of crude laccase to Congo red dye solution resulted in 36.84% decolourization after 20 h of incubation at 35 ± 2 °C. This study discusses the production and characterization of a laccase from P. ostreatus strain with potential for azo dye decolourization.
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Affiliation(s)
- Arijit Das
- Department of Microbiology, Center for Post Graduate Studies, Jain University, Bangalore 560011, Karnataka, India
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24
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Friedman M. Mushroom Polysaccharides: Chemistry and Antiobesity, Antidiabetes, Anticancer, and Antibiotic Properties in Cells, Rodents, and Humans. Foods 2016; 5:E80. [PMID: 28231175 PMCID: PMC5302426 DOI: 10.3390/foods5040080] [Citation(s) in RCA: 171] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 11/10/2016] [Accepted: 11/22/2016] [Indexed: 02/07/2023] Open
Abstract
More than 2000 species of edible and/or medicinal mushrooms have been identified to date, many of which are widely consumed, stimulating much research on their health-promoting properties. These properties are associated with bioactive compounds produced by the mushrooms, including polysaccharides. Although β-glucans (homopolysaccharides) are believed to be the major bioactive polysaccharides of mushrooms, other types of mushroom polysaccharides (heteropolysaccharides) also possess biological properties. Here we survey the chemistry of such health-promoting polysaccharides and their reported antiobesity and antidiabetic properties as well as selected anticarcinogenic, antimicrobial, and antiviral effects that demonstrate their multiple health-promoting potential. The associated antioxidative, anti-inflammatory, and immunomodulating activities in fat cells, rodents, and humans are also discussed. The mechanisms of action involve the gut microbiota, meaning the polysaccharides act as prebiotics in the digestive system. Also covered here are the nutritional, functional food, clinical, and epidemiological studies designed to assess the health-promoting properties of polysaccharides, individually and as blended mixtures, against obesity, diabetes, cancer, and infectious diseases, and suggestions for further research. The collated information and suggested research needs might guide further studies needed for a better understanding of the health-promoting properties of mushroom polysaccharides and enhance their use to help prevent and treat human chronic diseases.
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Affiliation(s)
- Mendel Friedman
- Western Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 800 Buchanan Street, Albany, CA 94710, USA.
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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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Kong L, Chu X, Liu W, Yao Y, Zhu P, Ling X. Glutathione-directed synthesis of Cr(vi)- and temperature-responsive fluorescent copper nanoclusters and their applications in cellular imaging. NEW J CHEM 2016. [DOI: 10.1039/c5nj03245h] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly red luminescent GSH–Cu nanoclusters were synthesized and could be used as nanosensors for Cr(vi) ions and temperature.
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Affiliation(s)
- Lingcan Kong
- Wuxi Center for Disease Control and Prevention
- Wuxi 214023
- P. R. China
| | - Xuefeng Chu
- Department of Basic Science
- Jilin Jianzhu University
- Changchun 130118
- P. R. China
| | - Wenwei Liu
- Wuxi Center for Disease Control and Prevention
- Wuxi 214023
- P. R. China
| | - Yuyang Yao
- Wuxi Center for Disease Control and Prevention
- Wuxi 214023
- P. R. China
| | - Pengfei Zhu
- Wuxi Center for Disease Control and Prevention
- Wuxi 214023
- P. R. China
| | - Xia Ling
- Wuxi Center for Disease Control and Prevention
- Wuxi 214023
- P. R. China
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27
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Manavalan T, Manavalan V, Thangavelu KP, Kutzner A, Heese K. Characterization of a Solvent-Tolerant Manganese Peroxidase (MnP) from G
anoderma Lucidum
and Its Application in Fruit Juice Clarification. J Food Biochem 2015. [DOI: 10.1111/jfbc.12188] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Tamilvendan Manavalan
- Centre for Advanced Studies in Botany; University of Madras; Chennai Tamil Nadu 600025 India
| | - Vetriselvan Manavalan
- Department of Pharmacology and Toxicology; University of Arkansas for Medical Sciences; Little Rock AR
| | - Kalaichelvan P. Thangavelu
- Centre for Advanced Studies in Botany; University of Madras; Chennai Tamil Nadu 600025 India
- Alka-Research Foundation; Coimbatore Tamil Nadu 641046 India
| | - Arne Kutzner
- Department of Information Systems; College of Engineering; Hanyang University; 222 Wangsimni-ro Seoul Seongdong-gu 133-791 Rep. of Korea
| | - Klaus Heese
- Graduate School of Biomedical Science and Engineering; Hanyang University; 222 Wangsimni-ro Seoul Seongdong-gu 133-791 Rep. of Korea
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28
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Aflatoxin B1 degradation during co-cultivation of Aspergillus flavus and Pleurotus ostreatus strains on rice straw. 3 Biotech 2015; 5:279-284. [PMID: 28324293 PMCID: PMC4434417 DOI: 10.1007/s13205-014-0228-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 05/27/2014] [Indexed: 11/30/2022] Open
Abstract
Aflatoxin B1 (AFB1) produced by Aspergillus flavus is known to have carcinogenic and teratogenic effects on animal health. Accidental feeding of AFB1-contaminated rice straw may be detrimental to dairy cattle. White-rot basidiomycetous fungus Pleurotus ostreatus can grow on different agronomic wastes by synthesizing different ligninolytic enzymes. These extracellular enzymes are capable of degrading many environmentally hazardous compounds including AFB1. The present study examines the ability of different strains of P. ostreatus to degrade AFB1 in contaminated rice straw. Different strains of A. flavus were inoculated on rice straw for AFB1 production. The moldy straw was then subjected to co-cultivation by different strains of P. ostreatus. The extent of AFB1 degradation was determined by high performance liquid chromatography. Results indicated the presence of AFB1 in the moldy straw samples at levels of 27.95 ± 0.23 and 21.26 ± 0.55 µg/g of dry substrate for A. flavus MTCC 2798 and A. flavus GHBF09, respectively. Co-cultivation of P. ostreatus strains on AFB1-contaminated rice straw revealed their ability to rapidly colonize the substrate by profuse hyphal ramification. Highest degradation of AFB1 (89.41 %) was recorded in the straw containing co-cultures of A. flavus MTCC 2798 and P. ostreatus GHBBF10. Natural isolate P. ostreatus GHBBF10 demonstrated higher AFB1-degradation potential than P.ostreatus MTCC 142. This basidiomycete strain can be further exploited to effectively degrade moderate concentrations of AFB1 in contaminated moldy rice straw.
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29
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Kong L, Liu W, Chu X, Yao Y, Zhu P, Ling X. Glutathione-directed synthesis of luminescent Ag2S nanoclusters as nanosensors for copper(ii) ions and temperature. RSC Adv 2015. [DOI: 10.1039/c5ra16455a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Highly red luminescent Ag2S nanoclusters were synthesized and they show higher sensitivity as nanosensors for copper(ii) ion and temperature.
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Affiliation(s)
- Lingcan Kong
- Wuxi Center for Disease Control and Prevention
- Wuxi 214023
- P. R. China
| | - Wenwei Liu
- Wuxi Center for Disease Control and Prevention
- Wuxi 214023
- P. R. China
| | - Xuefeng Chu
- Department of Basic Science
- Jilin Jianzhu University
- Changchun 130118
- P. R. China
| | - Yuyang Yao
- Wuxi Center for Disease Control and Prevention
- Wuxi 214023
- P. R. China
| | - Pengfei Zhu
- Wuxi Center for Disease Control and Prevention
- Wuxi 214023
- P. R. China
| | - Xia Ling
- Wuxi Center for Disease Control and Prevention
- Wuxi 214023
- P. R. China
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