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Gene expression response in target organ and whole blood varies as a function of target organ injury phenotype

Edward K Lobenhofer1 email, J Todd Auman2,11 email, Pamela E Blackshear3 email, Gary A Boorman4 email, Pierre R Bushel5 email, Michael L Cunningham4 email, Jennifer M Fostel6,7 email, Kevin Gerrish2 email, Alexandra N Heinloth2 email, Richard D Irwin4 email, David E Malarkey8 email, B Alex Merrick7 email, Stella O Sieber2 email, Charles J Tucker2 email, Sandra M Ward8 email, Ralph E Wilson8 email, Patrick Hurban1 email, Raymond W Tennant* 9 email and Richard S Paules* 10 email

1Cogenics, a Division of Clinical Data, Inc., Morrisville, NC 27560, USA

2NIEHS Microarray Group, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA

3Integrated Laboratory Systems, Inc., Research Triangle Park, NC 27709, USA

4National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA

5Biostatistics Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA

6National Center for Toxicogenomics, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA

7Laboratory of Respiratory Biology, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA

8Laboratory of Experimental Pathology, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA

9Cancer Biology Group, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA

10Environmental Stress and Cancer Group, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709

11Current address: Institute for Pharmacogenomics and Individualized Therapy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA

author email corresponding author email* Contributed equally

Genome Biology 2008, 9:R100doi:10.1186/gb-2008-9-6-r100

Published: 20 June 2008

Subject areas: Genome studies, Medicine, Physiology

Abstract

This report details the standardized experimental design and the different data streams that were collected (histopathology, clinical chemistry, hematology and gene expression from the target tissue (liver) and a bio-available tissue (blood)) after treatment with eight known hepatotoxicants (at multiple time points and doses with multiple biological replicates). The results of the study demonstrate the classification of histopathological differences, likely reflecting differences in mechanisms of cell-specific toxicity, using either liver tissue or blood transcriptomic data.


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