Genotoxicity assessment of chemical mixtures

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Title: Genotoxicity assessment of chemical mixtures
Authors: More, Simon John
Bampidis, Vasileios
Benford, Diane
et al.
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Date: 17-Jan-2019
Online since: 2019-04-11T11:07:45Z
Abstract: The EFSA Scientific Committee addressed in this document the peculiarities related to the genotoxicity assessment of chemical mixtures. The EFSA Scientific Committee suggests that first a mixture should be chemically characterised as far as possible. Although the characterisation of mixtures is relevant also for other toxicity aspects, it is particularly significant for the assessment of genotoxicity. If a mixture contains one or more chemical substances that are individually assessed to be genotoxic in vivo via a relevant route of administration, the mixture raises concern for genotoxicity. If a fully chemically defined mixture does not contain genotoxic chemical substances, the mixture is of no concern with respect to genotoxicity. If a mixture contains a fraction of chemical substances that have not been chemically identified, experimental testing of the unidentified fraction should be considered as the first option or, if this is not feasible, testing of the whole mixture should be undertaken. If testing of these fraction(s) or of the whole mixture in an adequately performed set of in vitro assays provides clearly negative results, the mixture does not raise concern for genotoxicity. If in vitro testing provides one or more positive results, an in vivo follow‐up study should be considered. For negative results in the in vivo follow‐up test(s), the possible limitations of in vivo testing should be weighed in an uncertainty analysis before reaching a conclusion of no concern with respect to genotoxicity. For positive results in the in vivo follow‐up test(s), it can be concluded that the mixture does raise a concern about genotoxicity.
Type of material: Journal Article
Publisher: Wiley
Journal: EFSA Journal
Volume: 17
Issue: 1
Start page: 1
End page: 11
Copyright (published version): 2019 European Food Safety Authority
Keywords: Genotoxicity assessmentChemical mixturesUncertainty analysis
DOI: 10.2903/j.efsa.2019.5519
Language: en
Status of Item: Peer reviewed
Appears in Collections:Veterinary Medicine Research Collection

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