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Comparative analysis of perturbed molecular pathways identified in in vitro and in vivo toxicology studies

Martin Wiesinger1, Bernd Mayer, Paul Jennings

  • 1emergentec biodevelopment GmbH, Gersthofer Strasse 29-31, 1180 Vienna, Austria.

Toxicology in Vitro : an International Journal Published in Association with BIBRA
|April 21, 2012
PubMed

Insights

This study identifies common genes and pathways linking in vitro and in vivo toxicity testing. These findings aid in extrapolating cellular toxicity data to whole organisms, improving toxicological predictions.

Area of Science:

  • Toxicology
  • Genomics
  • Bioinformatics

Background:

  • In vitro toxicological testing faces challenges in extrapolating results to whole organisms.
  • Omic studies provide rich mechanistic data that could bridge in vitro and in vivo observations.
  • Literature mining can uncover common molecular features across different experimental conditions.

Purpose of the Study:

  • To identify common genes and pathways associated with nephrotoxicity, hepatotoxicity, and CNS toxicity across in vitro and in vivo studies.
  • To establish molecular links for improving the extrapolation of in vitro toxicity data to in vivo outcomes.
  • To leverage existing toxicological literature for enhanced predictive modeling.

Main Methods:

  • A literature mining strategy was employed to analyze academic toxicological data.
  • 1221 unique human genes associated with nephrotoxicity, hepatotoxicity, or CNS toxicity were identified.
  • Pathway enrichment analysis was performed to uncover shared toxicological pathways.

Main Results:

  • Four genes (heme oxygenase-1, nitric oxide synthetase 2, NFκB1, and p53) were common across all analyzed tissues and experimental conditions.
  • 17, 26, and 30 relevant pathways were identified for kidney, liver, and CNS toxicity, respectively.
  • These common markers and pathways demonstrate a link between in vitro and in vivo toxicity effects.

Conclusions:

  • Common molecular markers and pathways can serve as indicators for extrapolating in vitro toxicity results to in vivo effects.
  • This approach enhances the predictive power of in vitro toxicological assays.
  • The findings support the development of more reliable in vitro testing strategies for predicting organ-specific toxicity.

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