Gene expression profiling of target genes in ventilator-induced lung injury.
A Kinase Anchor Proteins
Cell Cycle Proteins
Cysteine-Rich Protein 61
EGF Family of Proteins
Gene Expression Regulation
Intercellular Signaling Peptides and Proteins
Mice, Inbred BALB C
Nuclear Receptor Subfamily 4, Group A, Member 1
Oligonucleotide Array Sequence Analysis
Receptors, Cytoplasmic and Nuclear
Reproducibility of Results
Gene Expression Profiling
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.