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Physiol. Genomics 26: 68-75, 2006. First published March 28, 2006; doi:10.1152/physiolgenomics.00110.2005
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Received 9 May 2005; accepted in final form 16 March 2006.
Physiological Genomics 26:68-75 (2006)
1094-8341/06 $8.00 © 2006 American Physiological Society

Gene expression profiling of target genes in ventilator-induced lung injury

Tamás Dolinay 1,2,3, Naftali Kaminski 1, Martina Felgendreher 4, Hong P. Kim 1, Paul Reynolds 5, Simon C. Watkins 6, Dörte Karp 4, Stefan Uhlig 4,* and Augustine M. K. Choi 1,*

1 Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
2 Department of Pulmonary Medicine, University of Debrecen, Debrecen, Hungary
3 Department of Pulmonary Medicine II, Josa Andras County Hospital, Nyiregyhaza, Hungary
4 Division of Pulmonary Pharmacology, Research Center Borstel, Borstel, Germany
5 Department of Environmental and Occupational Health, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania
6 Department of Cell Biology and Physiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania

In the lungs, high-pressure mechanical ventilation induces an inflammatory response similar to that observed in acute respiratory distress syndrome. To further characterize these responses and to compare them with classical inflammatory pathways, we performed gene expression profiling analysis of 20,000 mouse genes in isolated blood-free (to exclude genes from sequestered leukocytes) perfused mouse lungs exposed to low-pressure ventilation (10 cmH2O), high-pressure ventilation (25 cmH2O, overventilation), and LPS treatment. A large number of inflammatory and apoptotic genes were increased by both overventilation and LPS. However, certain growth factor-related genes, as well as genes related to development, cellular communication, and the cytoskeleton, were only regulated by overventilation. We validated and confirmed increased mRNA expression pattern of five genes (amphiregulin, gravin, Nur77, Cyr61, interleukin-11) by real-time PCR; furthermore, we confirmed increased protein expression of amphiregulin by immunohistochemistry and immunoblotting assays. These genes represent novel candidate genes in ventilator-induced lung injury.

overventilation; acute respiratory distress syndrome; gene expression analysis




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