Application of the pulsed light technology to mycotoxin degradation and inactivation.
Summary of "Application of the pulsed light technology to mycotoxin degradation and inactivation."
The persistence of mycotoxins and their metabolites in agricultural products is a major safety concern because of their high resistance to all kinds of decontamination techniques. In this study, we evaluated the effectiveness of the pulsed light technology for the degradation of mycotoxins. We report that eight flashes of pulsed light destroyed of 84.5 ± 1.9, 72.5 ± 1.1, 92.7 ± 0.8 and 98.1 ± 0.2% of zearalenone, deoxynivalenol, aflatoxin B1 and ochratoxin in solution. The degradation of the molecules was monitored by HPLC and LC-MS/MS analysis. We estimated the potential toxicity of zearalenone and deoxynivelenol after exposure to a pulsed light treatment using the Caenorhabditis elegans survival tests. The genotoxicity of aflatoxin B1 was also investigated using a complete Ames test. The results show that the treatment of zearalenone and deoxynivelenol by single or multiple flashes of pulsed light is associated with a stagnation or marginal decrease of the toxicity of the mycotoxins and that treatment of aflatoxin B1 by pulsed light can completely eliminate the mutagenic potential of this mycotoxin. This work provides the first demonstration of a nonthermal technology allowing mycotoxin destruction and inactivation of their mutagenic activity. Copyright © 2011 John Wiley & Sons, Ltd.
Affiliation
Laboratory of Microbiology Signals and Microenvironment (LMDF-SME), EA 4312, University of Rouen, 55 rue Saint Germain, F-27000, Evreux, France. morgane.moreau@univ-rouen.fr.
Journal Details
This article was published in the following journal.
Name: Journal of applied toxicology : JAT
ISSN: 1099-1263
Pages:
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/22025267
- DOI: http://dx.doi.org/10.1002/jat.1749
Medical and Biotech [MESH] Definitions
Aflatoxin B1
A potent hepatotoxic and hepatocarcinogenic mycotoxin produced by the Aspergillus flavus group of fungi. It is also mutagenic, teratogenic, and causes immunosuppression in animals. It is found as a contaminant in peanuts, cottonseed meal, corn, and other grains. The mycotoxin requires epoxidation to aflatoxin B1 2,3-oxide for activation. Microsomal monooxygenases biotransform the toxin to the less toxic metabolites aflatoxin M1 and Q1.
Virus Inactivation
Inactivation of viruses by non-immune related techniques. They include extremes of pH, HEAT treatment, ultraviolet radiation, IONIZING RADIATION; DESICCATION; ANTISEPTICS; DISINFECTANTS; organic solvents, and DETERGENTS.
Lasers, Dye
Tunable liquid lasers with organic compounds (i.e., dye) which have a strong absorption band, used as the active medium. During emission, the dye has to be optically excited by another light source (e.g., another laser or flash lamp). The range of the emission wavelength may be anywhere from the ultraviolet to the near infrared (i.e., from 180 to 1100nm). These lasers are operated in continuous wave and pulsed modes. (UMDNS, 2005)
Palpation
Application of fingers with light pressure to the surface of the body to determine consistence of parts beneath in physical diagnosis; includes palpation for determining the outlines of organs.
Adaptation, Ocular
The adjustment of the eye to variations in the intensity of light. Light adaptation is the adjustment of the eye when the light threshold is increased; DARK ADAPTATION when the light is greatly reduced. (From Cline et al., Dictionary of Visual Science, 4th ed)
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