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An Overview of National Toxicology Program’s Toxicogenomic Applications: DrugMatrix and ToxFX

  • Daniel L. Svoboda
  • Trey Saddler
  • Scott S. AuerbachEmail author
Chapter
Part of the Challenges and Advances in Computational Chemistry and Physics book series (COCH, volume 30)

Abstract

DrugMatrix and its automated toxicogenomics reporting system, ToxFX are the scientific communities’ largest molecular toxicology reference database and informatics systems. DrugMatrix consists of the comprehensive results of thousands of highly controlled and standardized toxicological experiments where rats or primary rat hepatocytes were systematically treated with more than 600 therapeutic, industrial, or environmental chemicals at both non-toxic and toxic doses. Following administration in vivo, comprehensive studies of the effects of these compounds were carried out after multiple durations of exposure, and in multiple target organs. Study types included pharmacology, clinical chemistry, hematology, histology, body and organ weights, and clinical observations. Additionally, a curation team extracted all relevant information on the compounds from the literature, the Physicians’ Desk Reference, package inserts, and other relevant sources. At the heart of the DrugMatrix database are thousands of gene expression data sets generated by extracting RNA from the toxicologically relevant organs and tissues and analyzing these RNAs using the GE Codelink rat array, and the Affymetrix whole-genome 230 2.0 rat GeneChip array systems. Additionally, the database contains 148 scorable genomic signatures, covering 96 distinct phenotypes derive from mining the DrugMatrix gene expression data. The signatures are informative of organ-specific pathology (e.g., hepatic steatosis), and mode of toxicological action (e.g., PXR activation in the liver). The phenotypes cover several common target tissues in toxicity testing (liver, kidney, heart, bone marrow, spleen, and skeletal muscle). Taken as a whole, DrugMatrix enables a toxicologist to formulate a comprehensive picture of toxicity with greater efficiency than traditional methods.

Keywords

ToxFX DrugMatrix Signature Toxicogenomics Database National Toxicology Program In vivo In vitro 

Abbreviations

API

Application Program Interface

BDE

Brominated Diphenyl Ethers

CEBS

Chemical Effects in Biological Systems

FDA

US Food and Drug Administration

GD

Gestation Day

GUI

Graphical User Interface

NIEHS

National Institute of Environmental Health Sciences

NTP

National Toxicology Program

PND

Postnatal Day

Notes

Acknowledgements

The authors would like to acknowledge the large group of former employees of Iconix Biosciences, in particular, Alan Roter for the original data generation and development of DrugMatrix and ToxFX. We would also like to acknowledge the ongoing support of the Sciome LLC and the NTP CEBS database team for support and maintenance of the tools and for help in disseminating the contents of the database. Finally, the authors would like to thank B. Alex Merrick for review of the book chapter.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Daniel L. Svoboda
    • 1
  • Trey Saddler
    • 2
  • Scott S. Auerbach
    • 3
    Email author
  1. 1.Sciome LLCDurhamUSA
  2. 2.Kelly Government SolutionsDurhamUSA
  3. 3.Division of the National Toxicology ProgramNational Institute of Environmental Health Sciences, National Institutes of HealthDurhamUSA

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