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Zhang D, Li X, Hu Y, Jiang H, Wu Y, Ding Y, Yu K, He H, Xu J, Sun L, Qian F. Tabersonine attenuates lipopolysaccharide-induced acute lung injury via suppressing TRAF6 ubiquitination. Biochem Pharmacol 2018; 154:183-192. [DOI: 10.1016/j.bcp.2018.05.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 05/03/2018] [Indexed: 12/12/2022]
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Abstract
Acute lung injury (ALI) and its more severe form, acute respiratory distress syndrome (ARDS), can result from both direct and indirect pulmonary damage caused by trauma and shock. In the course of ALI/ARDS, mediators released from resident cells, such as alveolar macrophages, may act as chemoattractants for invading cells and stimulate local cells to build up a proinflammatory micromilieu. Depending on the trauma setting, the role of alveolar macrophages is differentially defined. This review focuses on alveolar macrophage function after blunt chest trauma, ischemia/reperfusion, hemorrhagic shock, and thermal burns.
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Heat-shock response increases lung injury caused by Pseudomonas aeruginosa via an interleukin-10-dependent mechanism in mice. Anesthesiology 2014; 120:1450-62. [PMID: 24667831 DOI: 10.1097/aln.0000000000000235] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND The heat-shock response (HSR) protects from insults, such as ischemia-reperfusion injury, by inhibiting signaling pathways activated by sterile inflammation. However, the mechanisms by which the HSR activation would modulate lung damage and host response to a bacterial lung infection remain unknown. METHODS HSR was activated with whole-body hyperthermia or by intraperitoneal geldanamycin in mice that had their lungs instilled with Pseudomonas aeruginosa 24 h later (at least six mice per experimental group). Four hours after instillation, lung endothelial and epithelial permeability, bacterial counts, protein levels in bronchoalveolar lavage fluid, and lung myeloperoxidase activity were measured. Mortality rate 24 h after P. aeruginosa instillation was recorded. The HSR effect on the release of interleukin-10 and killing of P. aeruginosa bacteria by a mouse alveolar macrophage cell line and on neutrophil phagocytosis was also examined. RESULTS HSR activation worsened lung endothelial (42%) and epithelial permeability (50%) to protein, decreased lung bacterial clearance (71%), and increased mortality (50%) associated with P. aeruginosa pneumonia, an effect that was not observed in heat-shock protein-72-null mice. HSR-mediated decrease in neutrophil phagocytosis (69%) and bacterial killing (38%) by macrophages was interleukin-10 dependent, a mechanism confirmed by increased lung bacterial clearance and decreased mortality (70%) caused by P. aeruginosa pneumonia in heat-shocked interleukin-10-null mice. CONCLUSIONS Prior HSR activation worsens lung injury associated with P. aeruginosa pneumonia in mice via heat-shock protein-72- and interleukin-10-dependent mechanisms. These results provide a novel mechanism for the immunosuppression observed after severe trauma that is known to activate HSR in humans.
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Howard M, Roux J, Lee H, Miyazawa B, Lee JW, Gartland B, Howard AJ, Matthay MA, Carles M, Pittet JF. Activation of the stress protein response inhibits the STAT1 signalling pathway and iNOS function in alveolar macrophages: role of Hsp90 and Hsp70. Thorax 2010; 65:346-53. [PMID: 20388761 DOI: 10.1136/thx.2008.101139] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND AIM Alveolar fluid clearance is impaired by inducible nitric oxide synthase (iNOS)/nitric oxide (NO)-dependent mechanisms in acute lung injury (ALI)/acute respiratory distress syndrome (ARDS). The activation of the stress protein response (SPR) in alveolar macrophages on iNOS-dependent NO production in response to interferon gamma (IFNgamma), a major cytokine present in the airspace of patients with ALI, was investigated. METHODS The SPR was activated in murine and primary human alveolar macrophages prior to analysis of signal transducer and activator of transcription factor 1 (STAT1) activation, iNOS mRNA and protein synthesis, and NO production. RESULTS SPR activation resulted in inhibition of IFNgamma-mediated NO production (p=0.001) with >95% detergent insolubilisation of the STAT1 protein. Its subsequent proteasomal degradation was partially reversed with pretreatment of cells with the chemical chaperone glycerol. This early effect of the SPR was caused by the complete disruption of heat shock protein 90 (Hsp90)-STAT1 binding, as shown by immunoprecipitation. Recovery of STAT1 activation and recovery of iNOS synthesis occurred within 12 h after SPR activation (p=0.02). NO production (as compared with non-SPR controls) did not occur until 48 h later (p=0.02). SPR-induced Hsp70 (Hsp70i) expression caused a late inhibition of NO production (p=0.02). Inhibiting >50% Hsp70i expression recovered NO production to control levels whereas overexpressing Hsp70i in the absence of the SPR inhibited NO production (p=0.02). CONCLUSION Early inhibition of STAT1 following its dissociation from Hsp90, and later inhibition of iNOS activity by Hsp70i, represent novel mechanisms by which SPR activation modulates the IFNgamma signalling in alveolar macrophages. These results highlight a potential clinical application for Hsp90 inhibitors in modulating NO signalling during the early phase of acute lung injury.
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Affiliation(s)
- Marybeth Howard
- Laboratory of Surgical Research, Department of Anesthesia, University of California, San Francisco, CA 94110, USA.
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Roux J, Carles M, Koh H, Goolaerts A, Ganter MT, Chesebro BB, Howard M, Houseman BT, Finkbeiner W, Shokat KM, Paquet AC, Matthay MA, Pittet JF. Transforming growth factor beta1 inhibits cystic fibrosis transmembrane conductance regulator-dependent cAMP-stimulated alveolar epithelial fluid transport via a phosphatidylinositol 3-kinase-dependent mechanism. J Biol Chem 2009; 285:4278-90. [PMID: 19996317 DOI: 10.1074/jbc.m109.036731] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Exogenous or endogenous beta(2)-adrenergic receptor agonists enhance alveolar epithelial fluid transport via a cAMP-dependent mechanism that protects the lungs from alveolar flooding in acute lung injury. However, impaired alveolar fluid clearance is present in most of the patients with acute lung injury and is associated with increased mortality, although the mechanisms responsible for this inhibition of the alveolar epithelial fluid transport are not completely understood. Here, we found that transforming growth factor beta1 (TGF-beta1), a critical mediator of acute lung injury, inhibits beta(2)-adrenergic receptor agonist-stimulated vectorial fluid and Cl(-) transport across primary rat and human alveolar epithelial type II cell monolayers. This inhibition is due to a reduction in the cystic fibrosis transmembrane conductance regulator activity and biosynthesis mediated by a phosphatidylinositol 3-kinase (PI3K)-dependent heterologous desensitization and down-regulation of the beta(2)-adrenergic receptors. Consistent with these in vitro results, inhibition of the PI3K pathway or pretreatment with soluble chimeric TGF-beta type II receptor restored beta(2)-adrenergic receptor agonist-stimulated alveolar epithelial fluid transport in an in vivo model of acute lung injury induced by hemorrhagic shock in rats. The results demonstrate a novel role for TGF-beta1 in impairing the beta- adrenergic agonist-stimulated alveolar fluid clearance in acute lung injury, an effect that could be corrected by using PI3K inhibitors that are safe to use in humans.
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Affiliation(s)
- Jérémie Roux
- Laboratory of Surgical Research, Department of Anesthesia, University of California, San Francisco, California 94110, USA.
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Iles KE, Wright MM, Cole MP, Welty NE, Ware LB, Matthay MA, Schopfer FJ, Baker PR, Agarwal A, Freeman BA. Fatty acid transduction of nitric oxide signaling: nitrolinoleic acid mediates protective effects through regulation of the ERK pathway. Free Radic Biol Med 2009; 46:866-75. [PMID: 19133325 PMCID: PMC3104854 DOI: 10.1016/j.freeradbiomed.2008.12.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2008] [Revised: 11/19/2008] [Accepted: 12/02/2008] [Indexed: 12/31/2022]
Abstract
In vivo and in vitro studies revealed that nitroalkenes serve as protective mediators in the lung by inducing the cytoprotective enzyme heme oxygenase-1 (HO-1). Nitrolinoleic acid (LNO2) increased HO-1 mRNA, protein, and activity in cultured pulmonary epithelial cells treated with 5 to 50 microM LNO2 and in lungs of rats injected intraperitoneally with 2.6 mg/kg LNO2 twice daily for 20 days. Western blotting revealed that HO-1 protein increased significantly within 4 h of in vitro LNO2 addition and was preceded by an increase in HO-1 mRNA, consistent with transcriptional regulation of HO-1 expression by LNO2. LNO2 also dephosphorylated and activated eukaryotic initiation factor 2alpha, a key translational regulatory protein, indicating that increased translation may also contribute to LNO2-induced increases in HO-1. Exposure of cells to LNO2 activated ERK and JNK, as evidenced by increased phosphorylation. Downstream targets of ERK and JNK, Elk-1 and c-Jun, respectively, were also phosphorylated in response to LNO2 exposure. However, inhibitor studies revealed that only the ERK pathway is necessary for the LNO2-mediated increase in HO-1 mRNA and protein. These data reveal that LNO2 induces pulmonary epithelial HO-1 expression and downstream adaptive responses to inflammation via both transcriptional and translational regulatory mechanisms.
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Affiliation(s)
- Karen E. Iles
- Department of Anesthesiology, Vanderbilt University School of Medicine, Nashville TN
- The Center for Free Radical Biology, Vanderbilt University School of Medicine, Nashville TN
- Address correspondence to: Karen E. Iles, Ph.D, Department of Anesthesiology, University of Alabama at Birmingham, 1530 3rd Ave South, BMR II 304, Birmingham AL 35294, Phone: 205-975-2761/Fax: 205-934-7447, , Or to: Bruce A. Freeman, Ph.D, Department of Pharmacology and Chemical Biology, University of Pittsburgh, E1340 Biomedical Science Tower, 200 Lothrop Street, Pittsburgh, PA 15261 Phone: 412-648-9319/ Fax: 412-648-2229,
| | - Marcienne M. Wright
- Department of Medicine, Vanderbilt University School of Medicine, Nashville TN
| | - Marsha P. Cole
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Nathan E. Welty
- Department of Anesthesiology, Vanderbilt University School of Medicine, Nashville TN
| | - Lorraine B. Ware
- Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University School of Medicine, Nashville TN
| | | | - Francisco J. Schopfer
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Paul R.S. Baker
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Anupam Agarwal
- Department of Medicine, Vanderbilt University School of Medicine, Nashville TN
- The Center for Free Radical Biology, Vanderbilt University School of Medicine, Nashville TN
| | - Bruce A. Freeman
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA, USA
- Address correspondence to: Karen E. Iles, Ph.D, Department of Anesthesiology, University of Alabama at Birmingham, 1530 3rd Ave South, BMR II 304, Birmingham AL 35294, Phone: 205-975-2761/Fax: 205-934-7447, , Or to: Bruce A. Freeman, Ph.D, Department of Pharmacology and Chemical Biology, University of Pittsburgh, E1340 Biomedical Science Tower, 200 Lothrop Street, Pittsburgh, PA 15261 Phone: 412-648-9319/ Fax: 412-648-2229,
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Lagan AL, Melley DD, Evans TW, Quinlan GJ. Pathogenesis of the systemic inflammatory syndrome and acute lung injury: role of iron mobilization and decompartmentalization. Am J Physiol Lung Cell Mol Physiol 2008; 294:L161-74. [DOI: 10.1152/ajplung.00169.2007] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Changes in iron homeostatic responses routinely accompany infectious or proinflammatory insults. The systemic inflammatory response syndrome (SIRS) and the development of acute lung injury (ALI) feature pronounced systemic and lung-specific alterations in iron/heme mobilization and decompartmentalization; such responses may be of pathological significance for both the onset and progression of acute inflammation. The potential for excessive iron-catalyzed oxidative stress, altered proinflammatory redox signaling, and provision of iron as a microbial growth factor represent obvious adverse aspects of altered in vivo iron handling. The release of hemoglobin during hemolytic disease or surgical procedures such as those utilizing cardiopulmonary bypass procedures further impacts on iron mobilization, turnover, and storage with associated implications. Genetic predisposition may ultimately determine the extent to which SIRS and related syndromes develop in response to such changes. The design of specific therapeutic interventions based on endogenous stratagems to limit adverse aspects of altered iron handling may prove of therapeutic benefit for the treatment of SIRS and ALI.
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Morty RE, Eickelberg O, Seeger W. Alveolar fluid clearance in acute lung injury: what have we learned from animal models and clinical studies? Intensive Care Med 2007; 33:1229-1240. [PMID: 17525842 PMCID: PMC7095514 DOI: 10.1007/s00134-007-0662-7] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2006] [Accepted: 03/05/2007] [Indexed: 01/11/2023]
Abstract
Background Acute lung injury and the acute respiratory distress syndrome continue to be significant causes of morbidity and mortality in the intensive care setting. The failure of patients to resolve the alveolar edema associated with these conditions is a major contributing factor to mortality; hence there is continued interest to understand the mechanisms of alveolar edema fluid clearance. Discussion The accompanying review by Vadász et al. details our current understanding of the signaling mechanisms and cellular processes that facilitate clearance of edema fluid from the alveolar compartment, and how these signaling processes may be exploited in the development of novel therapeutic strategies. To complement that report this review focuses on how intact organ and animal models and clinical studies have facilitated our understanding of alveolar edema fluid clearance in acute lung injury and acute respiratory distress syndrome. Furthermore, it considers how what we have learned from these animal and organ models and clinical studies has suggested novel therapeutic avenues to pursue.
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Affiliation(s)
- Rory E Morty
- Department of Internal Medicine, University of Giessen Lung Center, Justus Liebig University, Klinikstrasse 36, 35392, Giessen, Germany.
| | - Oliver Eickelberg
- Department of Internal Medicine, University of Giessen Lung Center, Justus Liebig University, Klinikstrasse 36, 35392, Giessen, Germany
| | - Werner Seeger
- Department of Internal Medicine, University of Giessen Lung Center, Justus Liebig University, Klinikstrasse 36, 35392, Giessen, Germany
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Tsai HH, Chen YC, Lee WR, Hu CH, Hakozaki T, Yoshii T, Shen SC. Inhibition of inflammatory nitric oxide production and epidermis damages by Saccharomycopsis Ferment Filtrate. J Dermatol Sci 2006; 42:249-57. [PMID: 16533596 DOI: 10.1016/j.jdermsci.2006.01.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2005] [Revised: 01/24/2006] [Accepted: 01/26/2006] [Indexed: 11/22/2022]
Abstract
BACKGROUND Yeast extracts have been shown to perform anti-inflammatory and cytoprotective activities. However, the effects of yeast extracts on lipopolysaccharide (LPS)-induced nitric oxide (NO) production and epidermal damages are still unclear. OBJECTIVE To investigate the effect of Saccharomycopsis Ferment Filtrate (SFF) on LPS-induced NO production in RAW264.7 macrophages and epidermal damages. METHOD RAW264.7 cells are incubated with LPS (25 ng/mL) and different concentrations of SFF. The amount of NO production is detected by Griess reaction. Additionally, the expression of inducible nitric oxide synthase (iNOS) and heme oxygenase-1 (HO-1) are detected by Western blotting. Artificial epidermis is also used to mimic the in vivo condition to investigate the protective effects of SFF on LPS- or ultraviolet radiation (UVR)-induced damages by histology and electron microscopy. RESULTS The results show that SFF addition inhibits LPS-induced NO production and iNOS protein expression in a concentration-dependent manner without notable cytotoxicity in RAW264.7 cells, and induction of HO-1 protein expression by SFF was observed. Interestingly, both HO-1 inducers, hemin and CoCl2, significantly attenuated LPS-induced NO production and iNOS protein expression. The addition of CoCl2 potentiated the inhibitory effect of SFF on LPS-induced NO production. It seems that HO-1 protein participates in SFF inhibition of LPS-induced NO production. Furthermore, SFF exhibits significant protective effect on LPS- or UVR-induced damages in the artificial epidermis via histological and electron microscopic observations. CONCLUSION This study provided the first evidence to indicate the beneficial effects of SFF in preventing NO production in macrophages and damages in epidermis, respectively. It suggests that SFF possesses potential to be further developed.
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Affiliation(s)
- Hsiou-Hsin Tsai
- Department of Dermatology, Taipei Medical University Hospital, Taipei, Taiwan
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