Purpose
The aim of this study is to test the predictive power of in vivo multiorgan RNA expression profiling in identifying the biologic activity of molecules.
Methods
Animals were treated with compound A or B. At the end of the treatment period, in vivo multiorgan microarray-based gene expression data were collected. Investigators masked to the identity of the compounds analyzed the transcriptome signatures to define the molecular pathways affected by treatment and to hypothesize the biologic activity and potential therapeutic indications of the blinded compounds.
Results
For compound A, G-protein-coupled receptors and factors associated with cell growth were affected—growth hormone/insulin-like growth factor-1, glucagon/insulin axes, and general somatomedin-like activity. Deblinding showed the compound to be a somatostatin analog, SOM230, confirming the accuracy of the predicted biologic activity. For compound B, components of the inflammatory cascade potentially mediated by lipopolysaccharide, tumor necrosis factor, or proinflammatory cytokines were affected. The gene expression signatures were most consistent with an interleukin-6 family activity. Deblinding revealed that compound B was leukemia inhibitory factor.
Conclusions
VeloceGenomics is a strategy of coupling in vivo compound testing with genomic technologies. The process enables prediction of the mechanism of action and, coupled with other relevant data, prediction of the suitability of compounds for advancement in the drug development process.
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Abbreviations
- AMPA:
-
α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid
- ERK:
-
extracellular signal-related kinase
- GH:
-
growth hormone
- GPCR:
-
G-protein-coupled receptor
- IGF:
-
insulin-like growth factor
- IL:
-
interleukin
- JAK:
-
Janus kinase
- LIF:
-
leukemia inhibitory factor
- LPS:
-
lipopolysaccharide
- LRR:
-
leucine-rich repeats
- MAPK:
-
mitogen-activated protein kinase
- NF-κβ:
-
nuclear factor kappa beta
- OSM:
-
oncostatin M
- PI3K:
-
phosphatidylinositol 3 kinase
- SOCS:
-
suppressor of cytokine signaling
- SSTR:
-
somatostatin receptors
- STAT:
-
signal transducer and activator of transcription
- TIMP:
-
tissue inhibitor of metalloproteinase
- TLR:
-
Toll-like receptor
- TRAF:
-
tumor necrosis factor receptor-associated factor
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Acknowledgments
The authors thank Nicole Hartmann for expert technical assistance and Mark Bossie, PhD, and Maribeth Bogush, PhD, for assistance in preparation of the manuscript. This work was funded by Novartis Pharma AG.
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Papoian, R., Scherer, A., Saulnier, M. et al. VeloceGenomics: An Accelerated in Vivo Drug Discovery Approach to Rapidly Predict the Biologic, Drug-Like Activity of Compounds, Proteins, or Genes. Pharm Res 22, 1597–1613 (2005). https://doi.org/10.1007/s11095-005-6809-8
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DOI: https://doi.org/10.1007/s11095-005-6809-8