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Behrens M, Hüwel S, Galla HJ, Humpf HU. Efflux at the Blood-Brain Barrier Reduces the Cerebral Exposure to Ochratoxin A, Ochratoxin α, Citrinin and Dihydrocitrinone. Toxins (Basel) 2021; 13:toxins13050327. [PMID: 33946578 PMCID: PMC8147254 DOI: 10.3390/toxins13050327] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 04/26/2021] [Accepted: 04/29/2021] [Indexed: 11/16/2022] Open
Abstract
Recent studies have implied that environmental toxins, such as mycotoxins, are risk factors for neurodegenerative diseases. To act directly as neurotoxins, mycotoxins need to penetrate or affect the integrity of the blood-brain barrier, which protects the mammalian brain from potentially harmful substances. As common food and feed contaminants of fungal origin, the interest in the potential neurotoxicity of ochratoxin A, citrinin and their metabolites has recently increased. Primary porcine brain capillary endothelial cells were used to investigate cytotoxic or barrier-weakening effects of ochratoxin A, ochratoxin α, citrinin and dihydrocitrinone. The transfer and transport properties of the mycotoxins across the barrier formed by porcine brain capillary endothelial cell monolayers were analysed using HPLC-MS/MS. High levels of Ochratoxin A caused cytotoxic and barrier-weakening effects, whereas ochratoxin α, citrinin and dihydrocitrinone showed no adverse effects up to 10 µM. Likely due to efflux transporter proteins, the transfer to the brain compartment was much slower than expected from their high lipophilicity. Due to their slow transfer across the blood-brain barrier, cerebral exposure of ochratoxin A, ochratoxin α, citrinin and dihydrocitrinone is low and neurotoxicity is likely to play a subordinate role in their toxicity at common physiological concentrations.
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Affiliation(s)
- Matthias Behrens
- Institute of Food Chemistry, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany;
| | - Sabine Hüwel
- Institute of Biochemistry, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany; (S.H.); (H.-J.G.)
| | - Hans-Joachim Galla
- Institute of Biochemistry, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany; (S.H.); (H.-J.G.)
| | - Hans-Ulrich Humpf
- Institute of Food Chemistry, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany;
- Correspondence:
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Zhang Z, Fan Z, Nie D, Zhao Z, Han Z. Analysis of the Carry-Over of Ochratoxin A from Feed to Milk, Blood, Urine, and Different Tissues of Dairy Cows Based on the Establishment of a Reliable LC-MS/MS Method. Molecules 2019; 24:molecules24152823. [PMID: 31382421 PMCID: PMC6695942 DOI: 10.3390/molecules24152823] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 07/29/2019] [Accepted: 07/31/2019] [Indexed: 01/30/2023] Open
Abstract
A rapid and reliable liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed for simultaneous determination of ochratoxin A (OTA) and its metabolite ochratoxin α (OTα), for the first time, in dairy cow plasma, milk, urine, heart, liver, spleen, lung, and kidney. The established method was extensively validated by determining the linearity (R2 ≥ 0.990), sensitivity (lower limit of quantification, 0.1-0.2 ng mL-1), recovery (75.3-114.1%), precision (RSD ≤ 13.6%), and stability (≥83.0%). Based on the methodological advances, the carry-over of OTA was subsequently studied after oral administration of 30 μg/kg body weight OTA to dairy cows. As revealed, OTA and OTα were detected in urine, with maximal concentrations of 1.8 ng mL-1 and 324.6 ng mL-1, respectively, but not in milk, plasma, or different tissues, verifying the protection effects of rumen flora against OTA exposure for dairy cows. Moreover, 100 fresh milk samples randomly collected from different supermarkets in Shanghai were also analyzed, and no positive samples were found, further proving the correctness of the in vivo biotransformation results. Thus, from the currently available data, regarding OTA contamination issues on dairy cows, no significant health risks were related to OTA exposure due to the consumption of these products.
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Affiliation(s)
- Zhiqi Zhang
- Institute for Agro-Food Standards and Testing Technology, Shanghai Key Laboratory of Protected Horticultural Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Zhichen Fan
- Institute for Agro-Food Standards and Testing Technology, Shanghai Key Laboratory of Protected Horticultural Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Dongxia Nie
- Institute for Agro-Food Standards and Testing Technology, Shanghai Key Laboratory of Protected Horticultural Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Zhihui Zhao
- Institute for Agro-Food Standards and Testing Technology, Shanghai Key Laboratory of Protected Horticultural Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Zheng Han
- Institute for Agro-Food Standards and Testing Technology, Shanghai Key Laboratory of Protected Horticultural Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China.
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Xiong K, Wang XL, Zhi HW, Sun BG, Li XT. Identification and safety evaluation of a product from the biodegradation of ochratoxin A by an Aspergillus strain. J Sci Food Agric 2017; 97:434-443. [PMID: 27059118 DOI: 10.1002/jsfa.7742] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 02/08/2016] [Accepted: 02/10/2016] [Indexed: 06/05/2023]
Abstract
BACKGROUND Ochratoxin A (OTA) poses a serious health hazard throughout the world and is often reported in food commodities. At present, biological approaches to detoxifying OTA are now widely considered to be the most promising methods. RESULTS In this study, a strain that was identified as Aspergillus niger was isolated, and it has a strong ability to detoxify OTA. The degradation product (compound 1) of OTA was treated with crude enzyme. The product has been isolated and identified as C11 H9 O5 Cl (ochratoxin α), which is a weak lipophilic molecule, in contrast to fat-soluble OTA. The cytotoxic response of compound 1 was revealed to be different to that of OTA. Compound 1 does not induce cellular oxidative damage in comparison with OTA, which may cause lipid peroxidation (MDA), reduce SOD activity and induce DNA damage. CONCLUSION This study indicates that A. niger has the ability to detoxify OTA. The OTA degradation product, ochratoxin α, does not exert cytotoxic effects on cell metabolism. A. niger has prospective uses for the OTA decontamination of food and agricultural fields. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Ke Xiong
- Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing, 100048, China
- Beijing Innovation Centre of Food Nutrition and Human, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing, 100048, China
| | - Xiao-Ling Wang
- Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing, 100048, China
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing, 100048, China
| | - Hui-Wei Zhi
- Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing, 100048, China
- Beijing Innovation Centre of Food Nutrition and Human, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing, 100048, China
| | - Bao-Guo Sun
- Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing, 100048, China
- Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University (BTBU), Beijing, 100048, China
| | - Xiu-Ting Li
- Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing, 100048, China
- Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University (BTBU), Beijing, 100048, China
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Haq M, Gonzalez N, Mintz K, Jaja-Chimedza A, De Jesus CL, Lydon C, Welch A, Berry JP. Teratogenicity of Ochratoxin A and the Degradation Product, Ochratoxin α, in the Zebrafish (Danio rerio) Embryo Model of Vertebrate Development. Toxins (Basel) 2016; 8:40. [PMID: 26861395 PMCID: PMC4773793 DOI: 10.3390/toxins8020040] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Revised: 01/13/2016] [Accepted: 01/19/2016] [Indexed: 12/03/2022] Open
Abstract
Ochratoxins, and particularly ochratoxin A (OTA), are toxic fungal-derived contaminants of food and other agricultural products. Growing evidence supports the degradation of OTA by chemical, enzymatic and/or microbial means as a potential approach to remove this mycotoxin from food products. In particular, hydrolysis of OTA to ochratoxin α (OTα) and phenylalanine is the presumptive product of degradation in most cases. In the current study, we employed the zebrafish (Danio rerio) embryo, as a model of vertebrate development to evaluate, the teratogenicity of OTA and OTα. These studies show that OTA is potently active in the zebrafish embryo toxicity assay (ZETA), and that toxicity is both concentration- and time-dependent with discernible and quantifiable developmental toxicity observed at nanomolar concentrations. On the other hand, OTα had no significant effect on embryo development at all concentrations tested supporting a decreased toxicity of this degradation product. Taken together, these results suggest that ZETA is a useful, and highly sensitive, tool for evaluating OTA toxicity, as well as its degradation products, toward development of effective detoxification strategies. Specifically, the results obtained with ZETA, in the present study, further demonstrate the toxicity of OTA, and support its degradation via hydrolysis to OTα as an effective means of detoxification.
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Affiliation(s)
- Mehreen Haq
- Department of Chemistry and Biochemistry, Florida International University, 3000 NE 151 Street, North Miami, FL 33181, USA.
| | - Nelson Gonzalez
- Department of Chemistry and Biochemistry, Florida International University, 3000 NE 151 Street, North Miami, FL 33181, USA.
| | - Keenan Mintz
- Department of Chemistry and Biochemistry, Florida International University, 3000 NE 151 Street, North Miami, FL 33181, USA.
| | - Asha Jaja-Chimedza
- Department of Chemistry and Biochemistry, Florida International University, 3000 NE 151 Street, North Miami, FL 33181, USA.
| | - Christopher Lawrence De Jesus
- Department of Chemistry and Biochemistry, Florida International University, 3000 NE 151 Street, North Miami, FL 33181, USA.
| | - Christina Lydon
- Department of Chemistry and Biochemistry, Florida International University, 3000 NE 151 Street, North Miami, FL 33181, USA.
| | - Aaron Welch
- Chaplin School of Hospitality and Tourism Management, Florida International University, 3000 NE 151 Street, North Miami, FL 33181; USA.
| | - John P Berry
- Department of Chemistry and Biochemistry, Florida International University, 3000 NE 151 Street, North Miami, FL 33181, USA.
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Marin S, Ramos AJ, Cano-Sancho G, Sanchis V. Mycotoxins: occurrence, toxicology, and exposure assessment. Food Chem Toxicol 2013; 60:218-37. [PMID: 23907020 DOI: 10.1016/j.fct.2013.07.047] [Citation(s) in RCA: 852] [Impact Index Per Article: 77.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Revised: 07/15/2013] [Accepted: 07/18/2013] [Indexed: 02/06/2023]
Abstract
Mycotoxins are abiotic hazards produced by certain fungi that can grow on a variety of crops. Consequently, their prevalence in plant raw materials may be relatively high. The concentration of mycotoxins in finished products is usually lower than in raw materials. In this review, occurrence and toxicology of the main mycotoxins are summarised. Furthermore, methodological approaches for exposure assessment are described. Existing exposure assessments, both through contamination and consumption data and biomarkers of exposure, for the main mycotoxins are also discussed.
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Affiliation(s)
- S Marin
- Food Technology Dept., UTPV-XaRTA, Agrotecnio Center, University of Lleida, Rovira Roure 191, 25198 Lleida, Spain
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