PMID- 11317684 OWN - NLM STAT- MEDLINE DCOM- 20010823 LR - 20190921 IS - 0936-8051 (Print) IS - 0936-8051 (Linking) VI - 121 IP - 4 DP - 2001 TI - Hypoxia-inducible factor-1 activation and cyclo-oxygenase-2 induction are early reperfusion-independent inflammatory events in hemorrhagic shock. PG - 219-22 AB - Hemorrhagic shock (HS) initiates an inflammatory response that includes increased expression of inducible nitric oxide synthase (iNOS) and production of prostaglandins. Induction of iNOS during the ischemic phase of HS may involve the activation of the hypoxia-inducible factor-1 (HIF-1). Increased expression of cyclooxygenase-2 (COX-2) during HS contributes to prostaglandin production. The aim of this study was to determine whether the ischemic phase of HS results in the activation of HIF-1 and the induction of COX-2. The lungs of rats subjected to HS demonstrated a twofold increase in HIF-1 activation (P < 0.01) and a 7.4-fold increase in expression of COX-2 mRNA (P < 0.01) compared with sham controls. The upregulation of iNOS and COX-2 during ischemia are two important early response genes that promote the inflammatory response and may contribute to organ damage through the rapid and exaggerated production of nitric oxide and prostaglandins. FAU - Hierholzer, C AU - Hierholzer C AD - Department of Surgery, University of Pittsburgh School of Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA. FAU - Harbrecht, B G AU - Harbrecht BG FAU - Billiar, T R AU - Billiar TR FAU - Tweardy, D J AU - Tweardy DJ LA - eng GR - R01 DK055664/DK/NIDDK NIH HHS/United States GR - CA 72261/CA/NCI NIH HHS/United States GR - GM 53789/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - Germany TA - Arch Orthop Trauma Surg JT - Archives of orthopaedic and trauma surgery JID - 9011043 RN - 0 (DNA-Binding Proteins) RN - 0 (Hif1a protein, rat) RN - 0 (Hypoxia-Inducible Factor 1) RN - 0 (Hypoxia-Inducible Factor 1, alpha Subunit) RN - 0 (Isoenzymes) RN - 0 (Nuclear Proteins) RN - 0 (RNA, Messenger) RN - 0 (Transcription Factors) RN - EC 1.14.99.1 (Cyclooxygenase 2) RN - EC 1.14.99.1 (Prostaglandin-Endoperoxide Synthases) SB - IM MH - Animals MH - Cyclooxygenase 2 MH - DNA-Binding Proteins/*genetics MH - Enzyme Induction/genetics MH - Gene Expression/physiology MH - Hypoxia-Inducible Factor 1 MH - Hypoxia-Inducible Factor 1, alpha Subunit MH - Isoenzymes/*genetics MH - Lung/*blood supply/pathology MH - Male MH - Nuclear Proteins/*genetics MH - Prostaglandin-Endoperoxide Synthases/*genetics MH - RNA, Messenger/genetics MH - Rats MH - Rats, Sprague-Dawley MH - Reperfusion Injury/pathology/*physiopathology MH - Shock, Hemorrhagic/pathology/*physiopathology MH - Systemic Inflammatory Response Syndrome/pathology/*physiopathology MH - *Transcription Factors MH - Up-Regulation/genetics EDAT- 2001/04/25 10:00 MHDA- 2001/08/24 10:01 CRDT- 2001/04/25 10:00 PHST- 2001/04/25 10:00 [pubmed] PHST- 2001/08/24 10:01 [medline] PHST- 2001/04/25 10:00 [entrez] AID - 10.1007/s004020000211 [doi] PST - ppublish SO - Arch Orthop Trauma Surg. 2001;121(4):219-22. doi: 10.1007/s004020000211.