On the impact of second generation mating and offspring in multi-generation reproductive toxicity studies on classification and labelling of substances in Europe

Research output: Contribution to journalJournal article – Annual report year: 2011Researchpeer-review

  • Author: Rorije, Emiel

    National Institute of Public Health and the Environment

  • Author: Muller, André

    National Institute of Public Health and the Environment

  • Author: Beekhuijzen, Manon E.W.

    Notox BV

  • Author: Hass, Ulla

    Division of Toxicology and Risk Assessment, National Food Institute, Technical University of Denmark, Kemitorvet, 2800, Kgs. Lyngby, Denmark

  • Author: Heinrich-Hirsch, Barbara

    Federal Institute for Risk Assessment

  • Author: Paparella, Martin

    Environment Agency Austria

  • Author: Schenk, Erna

    National Institute of Public Health and the Environment

  • Author: Ulbrich, Beate

    Federal Institute for Risk Assessment

  • Author: Hakkert, Betty C.

    National Institute of Public Health and the Environment

  • Author: Piersma, Aldert H.

    Utrecht University

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The possible impact on classification and labelling decisions of effects observed in second generation parental (P1) and offspring (F2) parameters in multi-generation studies was investigated. This was done for 50 substances classified as reproductive toxicants in Europe, for which a multi-generation study was available. The P1 and F2 effects were compared to parental (P0) and first generation offspring (F1) effects with regard to type of effect as well as incidence, magnitude and severity (IMS), at any dose level. For every study with unique P1/F2 effects, or differences in IMS, the influence of the P1/F2 findings on the classification decision was investigated. Unique P1/F2 generation findings did not play a crucial role in the classification decision of any of the 50 classified substances, except for fenarimol. This substance however provided abundant alerts on the basis of its endocrine activity and developmental neurotoxicity and would therefore also be expected to be identified as a developmental neurotoxicant in an Extended One Generation Reproductive Toxicity Study (EOGRTS). These findings, in addition to the increased number of parameters analysed, increased statistical power and reduced animal use, provide strong further support for replacement of the classical two-generation reproductive toxicity study by the EOGRTS in regulatory reproductive toxicity assessment.
Original languageEnglish
JournalRegulatory Toxicology and Pharmacology
Issue number2
Pages (from-to)251-260
Publication statusPublished - 2011
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Extended One Generation Reproductive, Multi-generation reproductive toxicity, Test guideline, Developmental toxicity, Classification and labelling (EU C&L), Toxicity Study (EOGRTS)

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