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Hleba L, Hlebova M, Kovacik A, Petrova J, Maskova Z, Cubon J, Massanyi P. Use of MALDI-TOF MS to Discriminate between Aflatoxin B1-Producing and Non-Producing Strains of Aspergillus flavus. Molecules 2022; 27:molecules27227861. [PMID: 36431961 PMCID: PMC9692738 DOI: 10.3390/molecules27227861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 11/09/2022] [Accepted: 11/11/2022] [Indexed: 11/16/2022] Open
Abstract
Aflatoxin B1 (AFB1) is one of the most toxic mycotoxins. One of the producers of AFB1 is Aspergillus flavus. Therefore, its rapid identification plays a key role in various sectors of the food and feed industry. MALDI-TOF mass spectrometry is one of the fastest and most accurate methods today. Therefore, the aim of this research was to develop the rapid identification of producing and non-producing strains of A. flavus based on the entire mass spectrum. To accomplish the main goal a different confirmatory MALDI-TOF MS and TLC procedures such as direct AFB1 identification by scraping from TLC plates, A. flavus mycelium, nutrient media around A. flavus growth, and finally direct AFB1 identification from infected wheat and barley grains had to be conducted. In this experiment, MALDI-TOF mass spectrometry with various modifications was the main supporting technology. All confirmatory methods confirmed the presence of AFB1 in the samples of aflatoxin-producing strains of A. flavus and vice versa; AFB1 was not detected in the case of non-producing strains. Entire mass spectra (from 2 to 20 kDa) of aflatoxin-producing and non-producing A. flavus strains were collected, statistically analyzed and clustered. An in-depth analysis of the obtained entire mass spectra showed differences between AFB1-producing and non-producing strains of A. flavus. Statistical and cluster analysis divided AFB1-producing and non-producing strains of A. flavus into two monasteries. The results indicate that it is possible to distinguish between AFB1 producers and non-producers by comparing the entire mass spectra using MALDI-TOF MS. Finally, we demonstrated that if there are established local AFB1-producing and non-producing strains of A. flavus, the entire mass spectrum database identification of aflatoxigenic A. flavus strains can be even faster and cheaper, without the need to identify the toxin itself.
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Affiliation(s)
- Lukas Hleba
- Faculty of Biotechnology and Food Sciences, Institute of Biotechnology, Slovak University of Agriculture in Nitra, Tr. Andreja Hlinku 2, 949 76 Nitra, Slovakia
- Correspondence:
| | - Miroslava Hlebova
- Department of Biology, Faculty of Natural Sciences, University of Ss. Cyril and Methodius, Nám. J. Herdu 2, 917 01 Trnava, Slovakia
| | - Anton Kovacik
- Faculty of Biotechnology and Food Sciences, Institute of Applied Biology, Slovak University of Agriculture in Nitra, Tr. Andreja Hlinku 2, 949 76 Nitra, Slovakia
| | - Jana Petrova
- Faculty of Biotechnology and Food Sciences, Institute of Biotechnology, Slovak University of Agriculture in Nitra, Tr. Andreja Hlinku 2, 949 76 Nitra, Slovakia
| | - Zuzana Maskova
- Faculty of Biotechnology and Food Sciences, Institute of Biotechnology, Slovak University of Agriculture in Nitra, Tr. Andreja Hlinku 2, 949 76 Nitra, Slovakia
| | - Juraj Cubon
- Faculty of Biotechnology and Food Sciences, Institute of Food Sciences, Slovak University of Agriculture in Nitra, Tr. Andreja Hlinku 2, 949 76 Nitra, Slovakia
| | - Peter Massanyi
- Faculty of Biotechnology and Food Sciences, Institute of Applied Biology, Slovak University of Agriculture in Nitra, Tr. Andreja Hlinku 2, 949 76 Nitra, Slovakia
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Oyedeji AB, Green E, Adebiyi JA, Ogundele OM, Gbashi S, Adefisoye MA, Oyeyinka SA, Adebo OA. Metabolomic approaches for the determination of metabolites from pathogenic microorganisms: A review. Food Res Int 2021; 140:110042. [PMID: 33648268 DOI: 10.1016/j.foodres.2020.110042] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 11/04/2020] [Accepted: 12/13/2020] [Indexed: 12/30/2022]
Abstract
Metabolomics is a high precision analytical approach to obtaining detailed information of varieties of metabolites produced in biological systems, including foods. This study reviews the use of metabolomic approaches such as liquid chromatography mass spectrometry (LCMS), gas chromatography mass spectrometry (GC-MS), matrix assisted laser desorption /ionization tandem time of flight mass spectrometry (MALDI-TOF-MS) and nuclear magnetic resonance (NMR) for investigating the presence of foodborne pathogens and their metabolites. Pathogenic fungi and their notable metabolites (mycotoxins) have been studied more extensively using metabolomics as compared to bacteria, necessitating further studies in this regard. Nevertheless, such identified fungal and bacteria metabolites could be used as biomarkers for a more rapid detection of these pathogens in food. Other important compounds detected through metabolomics could also be correlated to functionality of these pathogenic strains, determined by the composition of the foods in which they exist, thereby providing insights into their metabolism. Considering the prevalence of these food pathogens, metabolomics still has potentials in the determination of food-borne pathogenic microorganisms especially for the determination of pathogenic bacteria toxins and is expected to generate research interests for further studies and applications.
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Affiliation(s)
- Ajibola Bamikole Oyedeji
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg Doornfontein Campus, P. O. Box 17011, Gauteng 2028, South Africa.
| | - Ezekiel Green
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg Doornfontein Campus, P. O. Box 17011, Gauteng 2028, South Africa
| | - Janet Adeyinka Adebiyi
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg Doornfontein Campus, P. O. Box 17011, Gauteng 2028, South Africa
| | - Opeolu Mayowa Ogundele
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg Doornfontein Campus, P. O. Box 17011, Gauteng 2028, South Africa
| | - Sefater Gbashi
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg Doornfontein Campus, P. O. Box 17011, Gauteng 2028, South Africa
| | - Martins Ajibade Adefisoye
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg Doornfontein Campus, P. O. Box 17011, Gauteng 2028, South Africa
| | - Samson Adeoye Oyeyinka
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg Doornfontein Campus, P. O. Box 17011, Gauteng 2028, South Africa
| | - Oluwafemi Ayodeji Adebo
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg Doornfontein Campus, P. O. Box 17011, Gauteng 2028, South Africa.
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Jerome Jeyakumar JM, Zhang M, Thiruvengadam M. Determination of mycotoxins by HPLC, LC-ESI-MS/MS, and MALDI-TOF MS in Fusarium species-infected sugarcane. Microb Pathog 2018; 123:98-110. [DOI: 10.1016/j.micpath.2018.06.045] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 06/16/2018] [Accepted: 06/28/2018] [Indexed: 01/12/2023]
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Abdelmaksoud HH, Guinan TM, Voelcker NH. Fabrication of Nanostructured Mesoporous Germanium for Application in Laser Desorption Ionization Mass Spectrometry. ACS APPLIED MATERIALS & INTERFACES 2017; 9:5092-5099. [PMID: 28107617 DOI: 10.1021/acsami.6b14362] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS) is a high-throughput analytical technique ideally suited for small-molecule detection from different bodily fluids (e.g., saliva, urine, and blood plasma). Many SALDI-MS substrates require complex fabrication processes and further surface modifications. Furthermore, some substrates show instability upon exposure to ambient conditions and need to be kept under special inert conditions. We have successfully optimized mesoporous germanium (meso-pGe) using bipolar electrochemical etching and efficiently applied meso-pGe as a SALDI-MS substrate for the detection of illicit drugs such as in the context of workplace, roadside, and antiaddictive drug compliance. Argon plasma treatment improved the meso-pGe efficiency as a SALDI-MS substrate and eliminated the need for surface functionalization. The resulting substrate showed a precise surface geometry tuning by altering the etching parameters, and an outstanding performance for illicit drug detection with a limit of detection in Milli-Q water of 1.7 ng/mL and in spiked saliva as low as 5.3 ng/mL for cocaine. The meso-pGe substrate had a demonstrated stability over 56 days stored in ambient conditions. This proof-of-principle study demonstrates that meso-pGe can be reproducibly fabricated and applied as an analytical SALDI-MS substrate which opens the door for further analytical and forensic high-throughput applications.
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Affiliation(s)
- Hazem H Abdelmaksoud
- Future Industries Institute, University of South Australia , University Boulevard, Mawson Lakes, Adelaide, 5095 South Australia, Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Future Industries Institute, University of South Australia , GPO Box 2471, Adelaide, South Australia 5001, Australia
| | - Taryn M Guinan
- Future Industries Institute, University of South Australia , University Boulevard, Mawson Lakes, Adelaide, 5095 South Australia, Australia
| | - Nicolas H Voelcker
- Future Industries Institute, University of South Australia , University Boulevard, Mawson Lakes, Adelaide, 5095 South Australia, Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Future Industries Institute, University of South Australia , GPO Box 2471, Adelaide, South Australia 5001, Australia
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Malachova A, van Egmond H, Berthiller F, Krska R. Determination of nivalenol in food and feed: an update. WORLD MYCOTOXIN J 2014. [DOI: 10.3920/wmj2013.1683] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Based on the recent scientific opinion published by the EFSA CONTAM panel on the risks to human and animal health related to the presence of nivalenol in food and feed, this article provides an update on the determination of this Fusarium mycotoxin. After a brief introduction into the chemistry of nivalenol, chromatographic methods as well as other approaches are being discussed. Methods for the determination of nivalenol are well established and can be applied for the analysis of cereals, food, feed and biological samples. Accurate quantification of nivalenol is mostly carried out by liquid chromatography coupled with (multi-stage) mass spectrometry (MS) often within a multi-analyte approach. Some novel techniques, such as direct analysis in real time (DART) MS and electrochemical methods, have shown potential to determine nivalenol, but applications for routine measurements are not yet available. None of the currently available analytical methods has been formally validated in interlaboratory validation studies. While a certified calibrant for nivalenol is available, no matrix reference materials have been developed. Due to the scarcity of appropriate antibodies also no rapid immunochemical methods specific for nivalenol have become available.
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Affiliation(s)
- A. Malachova
- Center for Analytical Chemistry, Department IFA-Tulln, University of Natural Resources and Life Sciences, Vienna (BOKU), Austria, Konrad-Lorenz-Str. 20, 3430 Tulln, Austria
| | - H.P. van Egmond
- RIKILT Institute of Food Safety, Wageningen University and Research Center, P.O. Box 230, 6700 AE Wageningen, the Netherlands
| | - F. Berthiller
- Center for Analytical Chemistry, Department IFA-Tulln, University of Natural Resources and Life Sciences, Vienna (BOKU), Austria, Konrad-Lorenz-Str. 20, 3430 Tulln, Austria
| | - R. Krska
- Center for Analytical Chemistry, Department IFA-Tulln, University of Natural Resources and Life Sciences, Vienna (BOKU), Austria, Konrad-Lorenz-Str. 20, 3430 Tulln, Austria
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Dohnal V, Dvořák V, Malíř F, Ostrý V, Roubal T. A comparison of ELISA and HPLC methods for determination of ochratoxin A in human blood serum in the Czech Republic. Food Chem Toxicol 2013; 62:427-31. [DOI: 10.1016/j.fct.2013.09.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Revised: 09/03/2013] [Accepted: 09/06/2013] [Indexed: 11/17/2022]
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Liu Y, Delwiche SR, Dong Y. Feasibility of FT–Raman spectroscopy for rapid screening for DON toxin in ground wheat and barley. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2011; 26:1396-401. [PMID: 21462584 DOI: 10.1080/02652030903013310] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Rapid detection of deoxynivalenol (DON) in cereal-based food and feed has long been the goal of regulators and manufacturers. As non-destructive approaches, infrared (IR) and near-infrared (NIR) spectroscopic techniques have been used for the prediction and classification of contaminated single-kernel and ground grain without any DON extraction steps. These methods, however, are hindered by the intense and broad spectral bands attributed to naturally occurring moisture. Raman spectroscopy could be an alternative to IR and NIR due to its insensitivity to water and fewer overlapped bands. This study explored the feasibility of the Raman technique for rapid and non-destructive screening of DON-contaminated wheat and barley meal. The advantages of this technique include the use of a 1064-nm NIR excitation laser that reduces interference from fluorescence of biological compounds in wheat and barley, the use of a simple intensity-intensity algorithm at two unique frequencies, plus the technique's ease of sample preparation. The results indicate that the simple algorithm, as well as principal component analysis applied to the Raman spectra, can be used to classify low from high DON grain.
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Affiliation(s)
- Y Liu
- Department of Nutrition and Food Science, University of Maryland, College Park, MD 20742, USA
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Maragos C, Busman M. Rapid and advanced tools for mycotoxin analysis: a review. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2010; 27:688-700. [DOI: 10.1080/19440040903515934] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Abstract
The combination of nanodiamond (ND) with biomolecular mass spectrometry (MS) makes rapid, sensitive detection of biopolymers from complex biosamples feasible. Due to its chemical inertness, optical transparency and biocompatibility, the advantage of NDs in MS study is unique. Furthermore, functionalization on the surfaces of NDs expands their application in the fields of proteomics and genomics for specific requirements greatly. This review presents methods of MS analysis based on solid phase extraction and elution on NDs and different application examples including peptide, protein, DNA, glycan and others. Owing to the quick development of nanotechnology, surface chemistry, new MS methods and the intense interest in proteomics and genomics, a huge increase of their applications in biomolecular MS analysis in the near future can be predicted.
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Affiliation(s)
- Xianglei Kong
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14850, USA
- The State Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-607-255-3726; Fax: +1-607-255-4137
| | - Ping Cheng
- The School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China; E-Mail:
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Chau H, Goh Y, Si B, Vujanovic V. Assessment of alcohol percentage test for fungal surface hydrophobicity measurement. Lett Appl Microbiol 2010; 50:295-300. [DOI: 10.1111/j.1472-765x.2009.02791.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Bhat R, Rai RV, Karim A. Mycotoxins in Food and Feed: Present Status and Future Concerns. Compr Rev Food Sci Food Saf 2010; 9:57-81. [DOI: 10.1111/j.1541-4337.2009.00094.x] [Citation(s) in RCA: 372] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Rahmani A, Jinap S, Soleimany F. Qualitative and Quantitative Analysis of Mycotoxins. Compr Rev Food Sci Food Saf 2009; 8:202-251. [DOI: 10.1111/j.1541-4337.2009.00079.x] [Citation(s) in RCA: 151] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Houska J, Panyala NR, Peña-Méndez EM, Havel J. Mass spectrometry of nanodiamonds. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2009; 23:1125-1131. [PMID: 19280609 DOI: 10.1002/rcm.3978] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Detonation nanodiamonds (NDs) were studied by time-of-flight mass spectrometry (TOF MS). The formation of singly charged carbon clusters, C(n) (+), with groups of clusters at n = 1-35, n approximately 160-400 and clusters with n approximately 8000 was observed. On applying either high laser energy or ultrasound, the position and intensity of the maxima change and a new group of clusters at n approximately 70-80 is formed. High carbon clusters consist of an even number of carbons while the percentage of odd-numbered clusters is quite low (< or =5-10%). On increasing the laser energy, the maximum of ionization (at n approximately 200 carbons) is shifted towards the lower m/z values. It is suggested that this is mainly due to the disaggregation of the original NDs. However, the partial destruction of NDs is also possible. The carbon clusters (n approximately 2-35) are partially hydrogenated and the average value of the hydrogenation was 10-30%. Trace impurities in NDs like Li, B, Fe, and others were detected at high laser energy. Several matrices for ionizing NDs were examined and NDs themselves can also be used as a matrix for the ionization of various organic compounds. When NDs were used as a matrix for gold nanoparticles, the formation of various gold carbides Au(m)C(n) was detected and their stoichiometry was determined. It was demonstrated that TOF MS can be used advantageously to analyze NDs, characterize their size distribution, aggregation, presence of trace impurities and surface chemistry.
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Affiliation(s)
- Jan Houska
- Department of Chemistry, Faculty of Science, Masaryk University, Kotlárská 2, 611 37 Brno, Czech Republic
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Tejral G, Panyala NR, Havel J. Carbon nanotubes: toxicological impact on human health and environment. J Appl Biomed 2009. [DOI: 10.32725/jab.2009.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Jedlicková L, Gadas D, Havlová P, Havel J. Determination of ergosterol levels in barley and malt varieties in the Czech Republic via HPLC. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:4092-4095. [PMID: 18476697 DOI: 10.1021/jf703675q] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Ergosterol is considered to be a suitable indicator of mold infestation in barley and malt. In this study ergosterol levels in different varieties of barley and malt produced in the Czech Republic were determined. A modified high-performance liquid chromatography (HPLC) method was statistically processed, validated (Effivalidation program), and applied to 124 samples of barley and malt. Ergosterol was isolated by extraction and saponification, and the quantification was performed using HPLC with diode array detection. The content of ergosterol ranged between the limit of detection (LOD) and 36.3 mg/kg in barley and between the LOD and 131.1 mg/kg in malt. Ergosterol is presumably connected with metabolites generated when barley grain is attacked by pathogens, and such barley often shows a high overfoaming (gushing) value. However, it was found that the content of ergosterol does not correlate with the degree of beer gushing.
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Affiliation(s)
- Lenka Jedlicková
- Department of Chemistry, Masaryk University, Brno, Czech Republic
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