Human relevance of rodent liver tumors: Key insights from a Toxicology Forum workshop on nongenotoxic modes of action.
Regul Toxicol Pharmacol
; 92: 1-7, 2018 Feb.
Article
em En
| MEDLINE
| ID: mdl-29113941
ABSTRACT
The Toxicology Forum sponsored a workshop in October 2016, on the human relevance of rodent liver tumors occurring via nongenotoxic modes of action (MOAs). The workshop focused on two nuclear receptor-mediated MOAs (Constitutive Androstane Receptor (CAR) and Peroxisome Proliferator Activated Receptor-alpha (PPARα), and on cytotoxicity. The goal of the meeting was to review the state of the science to (1) identify areas of consensus and differences, data gaps and research needs; (2) identify reasons for inconsistencies in current regulatory positions; and (3) consider what data are needed to demonstrate a specific MOA, and when additional research is needed to rule out alternative possibilities. Implications for quantitative risk assessment approaches were discussed, as were implications of not considering MOA and dose in hazard characterization and labeling schemes. Most, but not all, participants considered the CAR and PPARα MOAs as not relevant to humans based on quantitative and qualitative differences. In contrast, cytotoxicity is clearly relevant to humans, but a threshold applies. Questions remain for all three MOAs concerning what data are necessary to determine the MOA and to what extent it is necessary to exclude other MOAs.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias Hepáticas
Tipo de estudo:
Etiology_studies
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Qualitative_research
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Risk_factors_studies
Limite:
Animals
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Humans
Idioma:
En
Revista:
Regul Toxicol Pharmacol
Ano de publicação:
2018
Tipo de documento:
Article