PMID- 17264168 OWN - NLM STAT- MEDLINE DCOM- 20070530 LR - 20201209 IS - 1530-6860 (Electronic) IS - 0892-6638 (Linking) VI - 21 IP - 7 DP - 2007 May TI - VEGF-induced heme oxygenase-1 confers cytoprotection from lethal hyperoxia in vivo. PG - 1422-32 AB - Prolonged exposure to hyperoxia results in hyperoxic acute lung injury (HALI). Vascular endothelial growth factor (VEGF) has been shown to have cytoprotective effects and prolong survival in an in vivo model of HALI. Heme oxygenase-1 (HO-1) has protective effects in hyperoxia; therefore, we hypothesized that induction of HO-1 would be an important contributor to VEGF-induced cytoprotection. Using inducible, lung-specific VEGF overexpressing transgenic mice, we demonstrated that VEGF is a potent inducer of HO-1 mRNA and protein in mouse lung. To evaluate the effect of inhibition of HO-1 on injury, VEGF transgenic mice were treated with HO-1 short interfering RNA (HO-1 siRNA) and exposed to hyperoxia. Total lung lavage protein concentration, TUNEL staining, lipid peroxidation, and wet-to-dry ratio were all increased, consistent with increased injury. These findings were corroborated by survival studies in which inhibition of HO-1 function using tin-protoporphryin or silencing of HO-1 with lentiviral HO-1 short hairpin RNA (ShRNA) significantly decreased survival in hyperoxia. We conclude from these data that VEGF-induced HO-1 is an important contributor to cytoprotection in this in vivo model of acute lung injury and that alterations in VEGF function in the lung are likely to be important determinants of the outcome of acute lung injury. FAU - Siner, Jonathan M AU - Siner JM AD - Section of Pulmonary and Critical Care Medicine, Yale University School of Medicine, P.O. Box 208057, New Haven, CT 06520-8057, USA. FAU - Jiang, Ge AU - Jiang G FAU - Cohen, Zaza I AU - Cohen ZI FAU - Shan, Peiying AU - Shan P FAU - Zhang, Xuchen AU - Zhang X FAU - Lee, Chun Geun AU - Lee CG FAU - Elias, Jack A AU - Elias JA FAU - Lee, Patty J AU - Lee PJ LA - eng GR - 5 F32 HL078127/HL/NHLBI NIH HHS/United States GR - R01 HL071595/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20070130 PL - United States TA - FASEB J JT - FASEB journal : official publication of the Federation of American Societies for Experimental Biology JID - 8804484 RN - 0 (DNA Primers) RN - 0 (RNA, Small Interfering) RN - 0 (VEGFA protein, human) RN - 0 (Vascular Endothelial Growth Factor A) RN - EC 1.14.14.18 (Heme Oxygenase (Decyclizing)) SB - IM MH - Animals MH - Base Sequence MH - Bronchoalveolar Lavage Fluid MH - *Cytoprotection MH - DNA Primers MH - Disease Models, Animal MH - Enzyme Induction MH - Heme Oxygenase (Decyclizing)/*biosynthesis/genetics MH - Humans MH - Hyperoxia/enzymology/*prevention & control MH - In Situ Nick-End Labeling MH - Lipid Peroxidation MH - Lung/enzymology MH - Mice MH - Mice, Transgenic MH - RNA, Small Interfering MH - Respiratory Distress Syndrome/enzymology MH - Reverse Transcriptase Polymerase Chain Reaction MH - Vascular Endothelial Growth Factor A/*physiology EDAT- 2007/02/01 09:00 MHDA- 2007/05/31 09:00 CRDT- 2007/02/01 09:00 PHST- 2007/02/01 09:00 [pubmed] PHST- 2007/05/31 09:00 [medline] PHST- 2007/02/01 09:00 [entrez] AID - fj.06-6661com [pii] AID - 10.1096/fj.06-6661com [doi] PST - ppublish SO - FASEB J. 2007 May;21(7):1422-32. doi: 10.1096/fj.06-6661com. Epub 2007 Jan 30.