title: Acute oral toxicity: variability, reliability, relevance and interspecies comparison of rodent LD50 data from literature surveyed for the ACuteTox project.
abstract: The ACuteTox project has aimed to optimise and prevalidate an in vitro testing strategy for predicting human acute toxicity. Ninety-seven reference substances were selected and an in vivo acute toxicity database was compiled. Comprehensive statistical analyses of the in vivo LD50 data to evaluate variability and reliability, interspecies correlation, predictive capacities with regard to EU and GHS toxicity categories, and deduction of performance criteria for in vitro methods is presented. For the majority of substances variability among rodent data followed a log normal distribution where good reproducibility was found. Rat and mouse interspecies comparison of LD50 studies by ordinary regression showed high correlation, with coefficients of determination, ranging between 0.8 and 0.9. Substance specific differences were only significant for warfarin and cycloheximide. No correlation of compound LD50 range with presumed study quality rank (by assigning Klimisch reliability scores) was found. Modelling based on LD50 variability showed that with at least 90% probability ∼54% of the substances would fall into only one GHS category and ∼44% would fall within two adjacent categories. These results could form the basis for deriving a predictive capacity that should be expected from alternative approaches to the conventional in vivo acute oral toxicity test.
authors: In Vitro Methods Unit, European Centre for the Validation of Alternative Methods (ECVAM), Institute for Health and Consumer Protection (IHCP), European Commission Joint Research Centre, Via E. Fermi 2749, TP 580, I-21027, Ispra, Italy.
authors: Sebastian
authors: S
authors: Hoffmann
authors: Agnieszka
authors: A
authors: Kinsner-Ovaskainen
authors: Pilar
authors: P
authors: Prieto
authors: Inge
authors: I
authors: Mangelsdorf
authors: Christian
authors: C
authors: Bieler
authors: Thomas
authors: T
authors: Cole
mesh_terms: D000284:Administration, Oral; D000826:Animal Testing Alternatives / Q000379:methods / Q000706:statistics & numerical data; D000818:Animals; D016208:Databases, Factual; D017408:Guidelines as Topic; D006801:Humans; D007928:Lethal Dose 50; D051379:Mice; D009928:Organ Specificity; D051381:Rats; D013045:Species Specificity; D023382:Toxicity Tests, Acute / Q000379:methods / Q000706:statistics & numerical data