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Chou HC, Chen CM. Cathelicidin Attenuates Hyperoxia-Induced Lung Injury by Inhibiting Ferroptosis in Newborn Rats. Antioxidants (Basel) 2022; 11:antiox11122405. [PMID: 36552613 PMCID: PMC9774284 DOI: 10.3390/antiox11122405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 11/22/2022] [Accepted: 11/29/2022] [Indexed: 12/11/2022] Open
Abstract
High oxygen concentrations are often required to treat newborn infants with respiratory distress but have adverse effects, such as increased oxidative stress and ferroptosis and impaired alveolarization. Cathelicidins are a family of antimicrobial peptides that exhibit antioxidant activity, and they can reduce hyperoxia-induced oxidative stress. This study evaluated the effects of cathelicidin treatment on lung ferroptosis and alveolarization in hyperoxia-exposed newborn rats. Sprague Dawley rat pups were either reared in room air (RA) or hyperoxia (85% O2) and then randomly given cathelicidin (8 mg/kg) in 0.05 mL of normal saline (NS), or NS was administered intraperitoneally on postnatal days from 1-6. The four groups obtained were as follows: RA + NS, RA + cathelicidin, O2 + NS, and O2 + cathelicidin. On postnatal day 7, lungs were harvested for histological, biochemical, and Western blot analyses. The rats nurtured in hyperoxia and treated with NS exhibited significantly lower body weight and cathelicidin expression, higher Fe2+, malondialdehyde, iron deposition, mitochondrial damage (TOMM20), and interleukin-1β (IL-1β), and significantly lower glutathione, glutathione peroxidase 4, and radial alveolar count (RAC) compared to the rats kept in RA and treated with NS or cathelicidin. Cathelicidin treatment mitigated hyperoxia-induced lung injury, as demonstrated by higher RAC and lower TOMM20 and IL-1β levels. The attenuation of lung injury was accompanied by decreased ferroptosis. These findings indicated that cathelicidin mitigated hyperoxia-induced lung injury in the rats, most likely by inhibiting ferroptosis.
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Affiliation(s)
- Hsiu-Chu Chou
- Department of Anatomy and Cell Biology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
| | - Chung-Ming Chen
- Department of Pediatrics, Taipei Medical University Hospital, Taipei 110, Taiwan
- Department of Pediatrics, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
- Correspondence:
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Schietroma M, Colozzi S, Pessia B, Carlei F, Di Furia M, Amicucci G. Laparoscopic Nissen fundoplication: The effects of high-concentration supplemental perioperative oxygen on the inflammatory and immune response: A randomised controlled trial. J Minim Access Surg 2018; 14:221-229. [PMID: 29582795 PMCID: PMC6001299 DOI: 10.4103/jmas.jmas_120_16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Background A number of studies have been reported on the effects of high-concentration oxygen (HCO) on cytokine synthesis, with controversial results. We assessed the effect of administration of perioperative HCO on systemic inflammatory and immune response in patients undergoing laparoscopic Nissen fundoplication (LNF). Materials and Methods Patients (n = 117) were assigned randomly to an oxygen/air mixture with a fraction of inspired oxygen (FiO2) of 30% (n = 58) or 80% (n = 59). Administration was commenced after induction of anaesthesia and maintained for 6 h after surgery. White blood cells, peripheral lymphocytes subpopulation, human leucocyte antigen-DR (HLA-DR), neutrophil elastase, interleukin (IL)-1 and IL-6 and C-reactive protein (CRP) were investigated. Results A significantly higher concentration of neutrophil elastase, IL-1, IL-6 and CRP was detected post-operatively in the 30% FiO2group patients in comparison with the 80% FiO2group (P < 0.05). A statistically significant change in HLA-DR expression was recorded post-operatively at 24 h, as a reduction of this antigen expressed on monocyte surface in patients from 30% FiO2group; no changes were noted in 80% FiO2group (P < 0.05). Conclusions This study demonstrated that perioperative HCO (80%), during LNF, can lead to a reduction in post-operative inflammatory response, and possibly, avoid post-operative immunosuppression.
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Affiliation(s)
| | - Sara Colozzi
- Department of Surgery, University of L'Aquila, L'Aquila, Italy
| | - Beatrice Pessia
- Department of Surgery, University of L'Aquila, L'Aquila, Italy
| | | | - Marino Di Furia
- Department of Surgery, University of L'Aquila, L'Aquila, Italy
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Bouch S, O'Reilly M, de Haan JB, Harding R, Sozo F. Does lack of glutathione peroxidase 1 gene expression exacerbate lung injury induced by neonatal hyperoxia in mice? Am J Physiol Lung Cell Mol Physiol 2017; 313:L115-L125. [PMID: 28385808 DOI: 10.1152/ajplung.00039.2016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 03/01/2017] [Accepted: 04/03/2017] [Indexed: 11/22/2022] Open
Abstract
Supplemental oxygen (O2) increases the risk of lung injury in preterm infants, owing to an immature antioxidant system. Our objective was to determine whether impairing antioxidant defense by decreasing glutathione peroxidase 1 (GPx1) gene expression increases the injurious effects of hyperoxia (Hyp). GPx1+/+ and GPx1-/- C57Bl/6J mice were exposed to 21% O2 (Air) or 40% O2 (Hyp) from birth to postnatal day 7 (P7d); they were euthanized on P7d or maintained in air until adulthood [postnatal day 56 (P56d)] to assess short-term and long-term effects, respectively. We assessed lung architecture, three markers of pulmonary oxidative stress (P7d, P56d), macrophages in lung tissue (P7d), immune cells in bronchoalveolar lavage fluid (BALF; P56d), and GPx1-4 and catalase gene expression in lung tissue (P7d, P56d). On P7d, macrophages were decreased by lack of GPx1 expression and further decreased by hyperoxia. GPx1 expression was increased in GPx1+/+Hyp mice and decreased in both GPx1-/- groups. On P56d, heme oxygenase-1 was increased by hyperoxia when GPx1 was absent. There were significantly more immune cells from Hyp groups than from the GPx1+/+Air group and a greater proportion of lymphocytes in GPx1-/-Hyp mice. GPx1 expression was significantly decreased in GPx1-/- mice; GPx2-4 and catalase expression was increased in GPx1-/-Hyp mice compared with other groups. Tissue fraction was decreased in GPx1-/-Air mice; bronchiolar smooth muscle was decreased in GPx1-/- mice. GPx1 does not clearly exacerbate hyperoxia-induced increases in oxidative stress or lung injury but may alter pulmonary immune function. Increased expression of GPx2-4 and catalase in GPx1-/-Hyp mice suggests gene redundancy within the model.
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Affiliation(s)
- Sheena Bouch
- Development and Stem Cells Program, Monash Biomedicine Discovery Institute, and Department of Anatomy and Developmental Biology, Monash University, Melbourne, Victoria, Australia; and
| | - Megan O'Reilly
- Development and Stem Cells Program, Monash Biomedicine Discovery Institute, and Department of Anatomy and Developmental Biology, Monash University, Melbourne, Victoria, Australia; and
| | - Judy B de Haan
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Richard Harding
- Development and Stem Cells Program, Monash Biomedicine Discovery Institute, and Department of Anatomy and Developmental Biology, Monash University, Melbourne, Victoria, Australia; and
| | - Foula Sozo
- Development and Stem Cells Program, Monash Biomedicine Discovery Institute, and Department of Anatomy and Developmental Biology, Monash University, Melbourne, Victoria, Australia; and
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The Effects of High-Concentration Oxygen on Inflammatory Markers in Laparoscopic Cholecystectomy: A Randomized Controlled Trial. Surg Laparosc Endosc Percutan Tech 2017; 27:83-89. [DOI: 10.1097/sle.0000000000000326] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Ali M, Heyob KM, Velten M, Tipple TE, Rogers LK. DHA suppresses chronic apoptosis in the lung caused by perinatal inflammation. Am J Physiol Lung Cell Mol Physiol 2015; 309:L441-8. [PMID: 26138643 DOI: 10.1152/ajplung.00137.2015] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 06/26/2015] [Indexed: 01/16/2023] Open
Abstract
We have previously shown that an adverse perinatal environment significantly alters lung growth and development and results in persistently altered cardiopulmonary physiology in adulthood. Our model of maternal LPS treatment followed by 14 days of neonatal hyperoxia exposure causes severe pulmonary disease characterized by permanent decreases in alveolarization and diffuse interstitial fibrosis. The current investigations tested the hypothesis that dysregulation of Notch signaling pathways contributes to the permanently altered lung phenotype in our model and that the improvements we have observed previously with maternal docosahexaenoic acid (DHA) supplementation are mediated through normalization of Notch-related protein expression. Results indicated that inflammation (IL-6 levels) and oxidation (F2a-isoprostanes) persisted through 8 wk of life in mice exposed to LPS/O2 perinatally. These changes were attenuated by maternal DHA supplementation. Modest but inconsistent differences were observed in Notch-pathway proteins Jagged 1, DLL 1, PEN2, and presenilin-2. We detected substantial increases in markers of apoptosis including PARP-1, APAF-1, caspase-9, BCL2, and HMGB1, and these increases were attenuated in mice that were nursed by DHA-supplemented dams during the perinatal period. Although Notch signaling is not significantly altered at 8 wk of age in mice with perinatal exposure to LPS/O2, our findings indicate that persistent apoptosis continues to occur at 8 wk of age. We speculate that ongoing apoptosis may contribute to persistently altered lung development and may further enhance susceptibility to additional pulmonary disease. Finally, we found that maternal DHA supplementation prevented sustained inflammation, oxidation, and apoptosis in our model.
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Affiliation(s)
- Mehboob Ali
- Center for Perinatal Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio
| | - Kathryn M Heyob
- Center for Perinatal Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio
| | - Markus Velten
- Department of Anesthesiology and Intensive Care Medicine, Rheinische Friedrich-Wilhlems-University, University Medical Center, Bonn, Germany; and
| | - Trent E Tipple
- Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Lynette K Rogers
- Center for Perinatal Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio; Department of Pediatrics, The Ohio State University, Columbus, Ohio;
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Impact of oxygen availability on body weight management. Med Hypotheses 2010; 74:901-7. [DOI: 10.1016/j.mehy.2009.10.022] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2009] [Accepted: 10/11/2009] [Indexed: 01/17/2023]
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Johnson BH, Yi M, Masood A, Belcastro R, Li J, Shek S, Kantores C, Jankov RP, Tanswell AK. A critical role for the IL-1 receptor in lung injury induced in neonatal rats by 60% O2. Pediatr Res 2009; 66:260-5. [PMID: 19542903 DOI: 10.1203/pdr.0b013e3181b1bcd2] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
IL-1 beta, a proinflammatory cytokine, may contribute to the development of the chronic neonatal lung injury, bronchopulmonary dysplasia. Chronic neonatal lung injury was induced in rats, by exposure to 60% O2 for 14 d from birth, to determine whether pulmonary IL-1 expression was up-regulated and, if so, whether a daily s.c. IL-1 receptor antagonist injections would be protective. Exposure to 60% O2 for 14 d caused pulmonary neutrophil and macrophage influx, increased tissue fraction and tyrosine nitration, reduced VEGF-A and angiopoietin-1 expression, and reduced small vessel (20-65 microm) and alveolar numbers. Lung IL-1 alpha and -1 beta contents were increased after a 4-d exposure to 60% O2. IL-1 receptor antagonist treatment attenuated the 60% O2-dependent neutrophil influx, the increased tissue fraction, and the reduced alveolar number. Treatment did not restore VEGF-A or angiopoietin-1 expression and only partially attenuated the reduced vessel number in 60% O2-exposed pups. It also caused a paradoxical increase in macrophage influx and a reduction in small vessels in air-exposed pups. We conclude that antagonism of IL-1-mediated effects can, in major part, protect against lung injury in a rat model of 60% O2-induced chronic neonatal lung injury.
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Affiliation(s)
- Ben-Hur Johnson
- Department of Paediatrics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
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Joseph A, Li Y, Koo HC, Davis JM, Pollack S, Kazzaz JA. Superoxide dismutase attenuates hyperoxia-induced interleukin-8 induction via AP-1. Free Radic Biol Med 2008; 45:1143-9. [PMID: 18692129 DOI: 10.1016/j.freeradbiomed.2008.07.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2007] [Revised: 05/30/2008] [Accepted: 07/10/2008] [Indexed: 10/21/2022]
Abstract
Exposure of lung epithelial cells to hyperoxia results in the generation of excess reactive oxygen species (ROS), cell damage, and production of proinflammatory cytokines (interleukin-8; IL-8). Although activation of the NF-kappaB and c-Jun N-terminal kinase (JNK)/activator protein (AP)-1 transcription pathways occurs in hyperoxia, it is unclear whether activation of the AP-1 pathway has a direct impact on IL-8 production and whether overexpression of superoxide dismutase (SOD) can mitigate these proinflammatory processes. A549 cells were exposed to 95% O(2), and ROS production, AP-1 activation, and IL-8 levels were determined. Experimental groups included cells transduced with a recombinant adenovirus encoding CuZnSOD or MnSOD (two- to threefold increased activity) or transfected with a JNK1 small interfering RNA (RNAi). Hyperoxia resulted in significant increases in ROS generation, AP-1 activation, and IL-8 production, which were significantly attenuated by overexpression of either MnSOD or CuZnSOD. JNK1 RNAi also moderated IL-8 induction. The data indicate that activation of JNK1/AP-1 and subsequent IL-8 induction in hyperoxia are mediated by intracellular ROS, with SOD having significant protective effects.
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Affiliation(s)
- Ansamma Joseph
- CardioPulmonary Research Institute, Department of Medicine, Winthrop University Hospital, State University of New York Stony Brook School of Medicine, Mineola, NY 11501, USA
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Bhandari V, Choo-Wing R, Homer RJ, Elias JA. Increased hyperoxia-induced mortality and acute lung injury in IL-13 null mice. THE JOURNAL OF IMMUNOLOGY 2007; 178:4993-5000. [PMID: 17404281 DOI: 10.4049/jimmunol.178.8.4993] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
IL-13 is a critical effector at sites of Th2 inflammation and remodeling. As a result, anti-IL-13-based therapies are being actively developed to treat a variety of diseases and disorders. However, the beneficial effects of endogenous IL-13 in the normal and diseased lung have not been adequately defined. We hypothesized that endogenous IL-13 is an important regulator of oxidant-induced lung injury and inflammation. To test this hypothesis, we compared the effects of 100% O(2) in mice with wild-type and null IL-13 loci. In this study, we demonstrate that hyperoxia significantly augments the expression of the components of the IL-13R, IL-13Ralpha1, and IL-4Ralpha. We also demonstrate that, in the absence of IL-13, hyperoxia-induced tissue inflammation is decreased. In contrast, in the IL-13 null mice, DNA injury, cell death, caspase expression, and activation and mortality are augmented. Interestingly, the levels of the cytoprotective cytokines vascular endothelial cell growth factor, IL-6, and IL-11 were decreased in the bronchoalveolar lavage fluid. These studies demonstrate that the expression of the IL-13R is augmented and that the endogenous IL-13-IL-13R pathway contributes to the induction of inflammation and the inhibition of injury in hyperoxic acute lung injury.
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Affiliation(s)
- Vineet Bhandari
- Division of Perinatal Medicine, Yale University School of Medicine, Department of Pediatrics, Children's Hospital, New Haven, CT 06520, USA
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Bhandari V, Elias JA. Cytokines in tolerance to hyperoxia-induced injury in the developing and adult lung. Free Radic Biol Med 2006; 41:4-18. [PMID: 16781448 DOI: 10.1016/j.freeradbiomed.2006.01.027] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2005] [Revised: 01/18/2006] [Accepted: 01/23/2006] [Indexed: 10/25/2022]
Abstract
Cytokines are peptides that are produced by virtually every nucleated cell type in the body, possess overlapping biological activities, exert different effects at different concentrations, can either synergize or antagonize the effects of other cytokines, are regulated in a complex manner, and function via cytokine cascades. Hyperoxia-induced acute lung injury (HALI) is characterized by an influx of inflammatory cells, increased pulmonary permeability, and endothelial and epithelial cell injury/death. Some of these effects are orchestrated by cytokines. There are significant differences in the response of the developing versus the adult lung to hyperoxia. We review here cytokines (and select growth factors) that are involved in tolerance toward HALI in animal models. Increased cytokine expression and release have a cascade effect in HALI. IL-1 precedes the increase in IL-6 and CINC-1/IL-8 and this seems to predate the influx of inflammatory cells. Inflammatory cells in the alveolar space amplify the lung damage. Other cytokines that are primarily involved in this inflammatory response include IFN-gamma, MCP-1, and MIP-2. Certain cytokines (and growth factors) seem to ameliorate HALI by affecting cell death pathways. These include GM-CSF, KGF, IL-11, IL-13, and VEGF. There are significant differences in the type and temporal sequence of cytokine expression and release in the adult and newborn lung in response to hyperoxia. The newborn lung is greatly resistant to hyperoxia compared to the adult. The delayed increase in lung IL-1 and IL-6 in the newborn could induce protective factors that would help in the resolution of hyperoxia-induced injury. Designing a therapeutic approach to counteract oxygen toxicity in the adult and immature lung first needs understanding of the unique responses in each scenario.
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Affiliation(s)
- Vineet Bhandari
- Divison of Perinatal Medicine, Department of Pediatrics, Yale University School of Medicine, New Haven, CT 06520-8064, USA.
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Benson RM, Minter LM, Osborne BA, Granowitz EV. Hyperbaric oxygen inhibits stimulus-induced proinflammatory cytokine synthesis by human blood-derived monocyte-macrophages. Clin Exp Immunol 2003; 134:57-62. [PMID: 12974755 PMCID: PMC1808843 DOI: 10.1046/j.1365-2249.2003.02248.x] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Hyperbaric oxygen (HBO) is 100% oxygen administered at elevated atmospheric pressure to patients with inflammatory diseases. We developed an in vitro model to investigate the effects of HBO on stimulus-induced proinflammatory cytokine transcription and translation. Human blood-derived monocyte-macrophages were stimulated before being transferred to an HBO chamber where they were incubated at 97.9% O2, 2.1% CO2, 2.4 atmospheres absolute, 37 degrees C. Controls were maintained in the same warm room at normoxia at sea level, hyperoxia or increased pressure alone. A 90-min HBO exposure inhibited IL-1beta synthesized in response to lipopolysaccharide by 23%, lipid A by 45%, phytohaemagglutinin A (PHA) by 68%, and tumour necrosis factor (TNF)-alpha by 27%. HBO suppressed lipopolysaccharide-, lipid A- and PHA-induced TNF-alpha by 29%, 31% and 62%, respectively. HBO transiently reduced PHA-induced steady state IL-1beta mRNA levels. Hyperoxia alone and pressure alone did not affect cytokine production. The immunosuppressive effect of HBO was no longer evident in monocyte-macrophages exposed to HBO for more than 3 h. Interestingly, cells exposed to HBO for 12 h synthesized more IL-1beta than cells cultured under control conditions. In summary, HBO exposure transiently suppresses stimulus-induced proinflammatory cytokine production and steady state RNA levels.
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Affiliation(s)
- R M Benson
- Baystate Medical Center, Tufts University School of Medicine, Springfield, MA 01199, USA
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Lin HC, Wang CH, Yu CT, Huang KS, Liu CY, Yang CW, Kuo HP. Effect of endogenous nitric oxide on hyperoxia and tumor necrosis factor-alpha-induced leukosequestration and proinflammatory cytokine release in rat airways. Crit Care Med 2003; 31:508-16. [PMID: 12576959 DOI: 10.1097/01.ccm.0000050297.98028.0e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To investigate the effects of endogenous nitric oxide on hyperoxia and tumor necrosis factor-alpha-induced leukosequestration and proinflammatory cytokine release in rat airways. DESIGN Prospective, randomized, controlled animal study. SETTING Experimental laboratory. SUBJECTS Male Sprague-Dawley rats weighing 350-500 g. INTERVENTIONS The rats were pretreated with N(G)-nitro-L-arginine methyl ester (L-NAME; 10 mg/kg) or saline intravenously 4-6 mins before intratracheal administration of tumor necrosis factor-alpha, 95% oxygen, or both, when the vasopressor effect of L-NAME had reached a plateau. MEASUREMENTS AND MAIN RESULTS Bronchoalveolar lavage fluid was recovered from the airway of rats after exposure to 95% oxygen and tumor necrosis factor-alpha for 6 hrs under ventilator support. Neutrophils in lavage fluid were isolated and examined for the inducible nitric oxide synthase expression by flow-cytometric assay. Tumor necrosis factor-alpha and interleukin-1 beta in lavage fluid were measured by enzyme-linked immunosorbent assay. The percentage of neutrophils in bronchoalveolar fluid was significantly higher in rats exposed to hyperoxia + tumor necrosis factor-alpha (29.7 +/- 12.5%) compared with rats with hyperoxia (16.3 +/- 1.2%), tumor necrosis factor-alpha (4.2 +/- 1.1%), or room air (5.0 +/- 1.8%) alone (p <.05). Rats exposed to hyperoxia + tumor necrosis factor-alpha had significantly higher concentrations of inducible nitric oxide synthase of neutrophils (350.1 +/- 75.7 mean fluorescence intensity), compared with rats with hyperoxia (64.9 +/- 1.6 mean fluorescence intensity), tumor necrosis factor-alpha (102.6 +/- 15.3 mean fluorescence intensity), or room air (111.2 +/- 25.8 mean fluorescence intensity) alone (p <.05). Rats exposed to hyperoxia + tumor necrosis factor-alpha significantly produced higher concentrations of tumor necrosis factor-alpha and interleukin-1 beta, compared with rats with tumor necrosis factor-alpha, hyperoxia, or room air alone. Hyperoxia + tumor necrosis factor-alpha also significantly increased growth-related oncogene/cytokine-induced neutrophil chemoattractant (GRO/CINC)-1 in bronchoalveolar fluid, compared with those receiving tumor necrosis factor-alpha alone, hyperoxia alone, or room air alone. L-NAME significantly enhanced the percentage of neutrophil recovery and the production of tumor necrosis factor-alpha, interleukin-1 beta, and GRO/CINC-1 in airways compared with the corresponding hyperoxia + tumor necrosis factor-alpha treatment alone. CONCLUSIONS Endogenous nitric oxide may be an important endogenous inhibitor of hyperoxia + tumor necrosis factor-alpha-induced leukocyte recruitment and subsequently tumor necrosis factor-alpha, interleukin-1 beta, and GRO/CINC-1 release.
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Affiliation(s)
- Horng-Chyuan Lin
- Department of Thoracic Medicine II, Chang Gung Memorial Hospital, Taipei, Taiwan
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Affiliation(s)
- M A Cassatella
- Department of Pathology, Faculty of Medicine, University of Verona, Italy
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Deby-Dupont G, Deby C, Lamy M. Oxygen Therapy in Intensive Care Patients: A Vital Poison? ACTA ACUST UNITED AC 1999. [DOI: 10.1007/978-3-662-13453-5_37] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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