Document Detail

The DNA 'comet assay' as a rapid screening technique to control irradiated food.
MedLine Citation:
PMID:  9202727     Owner:  NLM     Status:  MEDLINE    
The exposure of food to ionizing radiation is being progressively used in many countries to inactivate food pathogens, to eradicate pests, and to extend shelf-life, thereby contributing to a safer and more plentiful food supply. To ensure free consumer choice, irradiated food will be labelled as such, and to enforce labelling, analytical methods to detect the irradiation treatment in the food product itself are desirable. In particular, there is a need for simple and rapid screening methods for the control of irradiated food. The DNA comet assay offers great potential as a rapid tool to detect whether a wide variety of foodstuffs have been radiation processed. In order to simplify the test, the agarose single-layer set-up has been chosen, using a neutral protocol. Interlaboratory blind trials have been successfully carried out with a number of food products, both of animal and plant origin. This paper presents an overview of the hitherto obtained results and in addition the results of an intercomparison test with seeds, dried fruits and spices are described. In this intercomparison, an identification rate of 95% was achieved. Thus, using this novel technique, an effective screening of radiation-induced DNA fragmentation is obtained. Since other food treatments also may cause DNA fragmentation, samples with fragmented DNA suspected to have been irradiated should be analyzed by other validated methods for irradiated food, if such treatments which damage DNA cannot be excluded.
H Cerda; H Delincée; H Haine; H Rupp
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Mutation research     Volume:  375     ISSN:  0027-5107     ISO Abbreviation:  Mutat. Res.     Publication Date:  1997 Apr 
Date Detail:
Created Date:  1997-07-17     Completed Date:  1997-07-17     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0400763     Medline TA:  Mutat Res     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  167-81     Citation Subset:  IM    
Department of Radioecology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
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MeSH Terms
Bone Marrow / chemistry
DNA Damage*
DNA Mutational Analysis / methods
Electrophoresis, Agar Gel / methods
Food Irradiation*
Mutagenicity Tests / methods*

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