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Variations in zearalenone activation in avian food species.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kolf-Clauw, M. Ayouni, F. Tardieu, D. Guerre, P.
Description	Country affiliation: France Author Affiliation: Kolf-Clauw M ( Unité de Mycotoxicologie, Ecole Nationale Vétérinaire de Toulouse, Toulouse Cedex, France. m.kolf-clauw@envt.fr)
Abstract	Zearalenone (ZEA), a widely distributed oestrogenic fusariotoxin, constitutes a potential risk for human and animal health. ZEA is metabolised to the main metabolites identified in vitro and in vivo: alpha-zearalenol (alpha-ZOL) and beta-zearalenol (beta-ZOL). The efficiency to produce alpha-reduced metabolites appears of particular interest in risk assessment as alpha-reduced metabolites constitute activated forms whereas beta-reduced metabolites are less oestrogenic than ZEA. In this study ZEA activation was compared in avian food species. ZEA and its reduced metabolites were quantified in subcellular fractions of six avian species and rat livers. The alpha-ZOL/beta-ZOL ratio in rats was 19. The various avian food species cannot be considered to be equivalent in terms of ZEA reduction (P<0.001). Quails represented high 'beta reducers', with alpha-ZOL/beta-ZOL ratio less than two. Weak 'beta reducers' included on one part ducks and chickens showing alpha-ZOL/beta-ZOL ratio greater than 3 and up to 5.6 and on a second part geese, showing a lower production of alpha-ZOL than other poultry. Comparisons of enzyme kinetics in ducks and in quails show that these variations can be explained by the action of various isoforms of dehydrogenases. These results are relevant to food safety, in the context of frequently inevitable contamination of animal feed.
File Format	HTM / HTML
ISSN	02786915
Issue Number	5
Volume Number	46
e-ISSN	18736351
Journal	Food and Chemical Toxicology
Language	English
Publisher	Elsevier
Publisher Date	2008-05-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Toxicology__semicolon__nutritional Discipline Sciences Birds Metabolism Estrogens, Non-steroidal Analysis Meat Zearalenone Animals Biotransformation Chickens Chromatography, High Pressure Liquid Ducks Pharmacokinetics Geese Indicators And Reagents Kinetics Male Oxidoreductases Poultry Quail Rats Rats, Sprague-dawley Species Specificity Subcellular Fractions Chemistry Comparative Study Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Medicine Toxicology Food Science

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