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Data from: A rat liver transcriptomic point of departure predicts a prospective liver or non-liver apical point of departure

Cite this dataset

Johnson, Kamin J.; Auerbach, Scott S.; Costa, Eduardo (2020). Data from: A rat liver transcriptomic point of departure predicts a prospective liver or non-liver apical point of departure [Dataset]. Dryad. https://doi.org/10.5061/dryad.pvmcvdngd

Abstract

Identifying a toxicity point of departure (POD) is a required step in human health risk characterization of crop protection molecules, and this POD has historically been derived from apical endpoints across a battery of animal-based toxicology studies. Using rat transcriptome and apical data for 79 molecules obtained from Open TG-GATES (Toxicogenomics Project-Genomics Assisted Toxicity Evaluation System) (632 datasets), the hypothesis was tested that a short-term exposure, transcriptome-based liver biological effect POD (BEPOD) could estimate a longer-term exposure “systemic” apical endpoint POD. Apical endpoints considered were body weight, clinical observation, kidney weight and histopathology and liver weight and histopathology. A BMDExpress algorithm using Gene Ontology Biological Process gene sets was optimized to derive a liver BEPOD most predictive of a systemic apical POD. Liver BEPODs were stable from 3 hours to 29 days of exposure; the median fold difference of the 29 day BEPOD to BEPODs from earlier time points was approximately 1 (range of 0.7-1.1). Strong positive correlation (Pearson R = 0.86) and predictive accuracy (root mean square difference = 0.41) were observed between a concurrent (29 day) liver BEPOD and the systemic apical POD. Similar Pearson R and root mean square difference values were observed for comparisons between a 29 day systemic apical POD and liver BEPODs derived from 3 hours to 15 days of exposure. These data across 79 molecules suggest that a longer-term exposure study apical POD from liver and non-liver compartments can be estimated using a liver BEPOD derived from an acute or subacute exposure study.

Funding

National Institute of Environmental Health Sciences

National Institute of Environmental Health Sciences

National Institutes of Health

National Institutes of Health, Award: ES103318-03