PMID- 18776134 OWN - NLM STAT- MEDLINE DCOM- 20090305 LR - 20211020 IS - 1535-4989 (Electronic) IS - 1044-1549 (Print) IS - 1044-1549 (Linking) VI - 40 IP - 3 DP - 2009 Mar TI - IL-6 cytoprotection in hyperoxic acute lung injury occurs via suppressor of cytokine signaling-1-induced apoptosis signal-regulating kinase-1 degradation. PG - 314-24 LID - 10.1165/rcmb.2007-0287OC [doi] AB - Hyperoxic acute lung injury (HALI) is characterized by a cell death response that is inhibited by IL-6. Suppressor of cytokine signaling-1 (SOCS-1) is an antiapoptotic negative regulator of the IL-6-mediated Janus kinase-signal transducer and activator of transcription signaling pathway. We hypothesized that SOCS-1 is a critical regulator and key mediator of IL-6-induced cytoprotection in HALI. To test this hypothesis, we characterized the expression of SOCS-1 and downstream apoptosis signal-regulating kinase (ASK)-1-Jun N-terminal kinase signaling molecules in small airway epithelial cells in the presence of H(2)O(2), which induces oxidative stress. We also examined these molecules in wild-type and lung-specific IL-6 transgenic (Tg(+)) mice exposed to 100% oxygen for 72 hours. In control small airway epithelial cells exposed to H(2)O(2) or in wild-type mice exposed to 100% oxygen, a marked induction of ASK-1 and pJun N-terminal kinase was observed. Both IL-6-stimulated endogenous SOCS-1 and SOCS-1 overexpression abolished H(2)O(2)-induced ASK-1 activation. In addition, IL-6 Tg(+) mice exposed to 100% oxygen exhibited reduced ASK-1 levels and enhanced SOCS-1 expression compared with wild-type mice. Interestingly, no significant changes in activation of the key ASK-1 activator, tumor necrosis factor receptor-1/tumor necrosis factor receptor-associated factor-2 were observed between wild-type and IL-6 Tg(+) mice. Furthermore, the interaction between SOCS-1 and ASK-1 promotes ubiquitin-mediated degradation both in vivo and in vitro. These studies demonstrate that SOCS-1 is an important regulator in IL-6-induced cytoprotection against HALI. FAU - Kolliputi, Narasaiah AU - Kolliputi N AD - Pulmonary Critical Care Unit, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Bulfinch 148, Boston, MA 02114, USA. FAU - Waxman, Aaron B AU - Waxman AB LA - eng GR - R01HL074859/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20080905 PL - United States TA - Am J Respir Cell Mol Biol JT - American journal of respiratory cell and molecular biology JID - 8917225 RN - 0 (Interleukin-6) RN - 0 (Oxidants) RN - 0 (Receptors, Tumor Necrosis Factor, Type I) RN - 0 (SCGB1A1 protein, human) RN - 0 (Scgb1a1 protein, mouse) RN - 0 (Socs1 protein, mouse) RN - 0 (Suppressor of Cytokine Signaling 1 Protein) RN - 0 (Suppressor of Cytokine Signaling Proteins) RN - 0 (TNF Receptor-Associated Death Domain Protein) RN - 0 (TNF Receptor-Associated Factor 2) RN - 0 (Tnfrsf1a protein, mouse) RN - 0 (Tradd protein, mouse) RN - 9060-09-7 (Uteroglobin) RN - BBX060AN9V (Hydrogen Peroxide) RN - EC 2.7.11.24 (JNK Mitogen-Activated Protein Kinases) RN - EC 2.7.11.25 (MAP Kinase Kinase Kinase 5) RN - EC 2.7.11.25 (Map3k5 protein, mouse) RN - EC 3.4.22.- (Caspase 8) SB - IM MH - Acute Lung Injury/*metabolism/pathology MH - Animals MH - Caspase 8/genetics/metabolism MH - Cells, Cultured MH - Cytoprotection/*physiology MH - Epithelial Cells/cytology/physiology MH - Humans MH - Hydrogen Peroxide/metabolism MH - Hyperoxia/*metabolism/pathology MH - Interleukin-6/genetics/*metabolism MH - JNK Mitogen-Activated Protein Kinases/genetics/metabolism MH - MAP Kinase Kinase Kinase 5/genetics/*metabolism MH - Mice MH - Mice, Transgenic MH - Oxidants/metabolism MH - Receptors, Tumor Necrosis Factor, Type I/genetics/metabolism MH - Signal Transduction/physiology MH - Suppressor of Cytokine Signaling 1 Protein MH - Suppressor of Cytokine Signaling Proteins/genetics/*metabolism MH - TNF Receptor-Associated Death Domain Protein/genetics/metabolism MH - TNF Receptor-Associated Factor 2/metabolism MH - Uteroglobin/genetics/metabolism PMC - PMC2645529 EDAT- 2008/09/09 09:00 MHDA- 2009/03/06 09:00 PMCR- 2010/03/01 CRDT- 2008/09/09 09:00 PHST- 2008/09/09 09:00 [pubmed] PHST- 2009/03/06 09:00 [medline] PHST- 2008/09/09 09:00 [entrez] PHST- 2010/03/01 00:00 [pmc-release] AID - 2007-0287OC [pii] AID - ajrcmb403314 [pii] AID - 10.1165/rcmb.2007-0287OC [doi] PST - ppublish SO - Am J Respir Cell Mol Biol. 2009 Mar;40(3):314-24. doi: 10.1165/rcmb.2007-0287OC. Epub 2008 Sep 5.