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Hyperbaric Oxygen Treatment: Effects on Mitochondrial Function and Oxidative Stress. Biomolecules 2021; 11:biom11121827. [PMID: 34944468 PMCID: PMC8699286 DOI: 10.3390/biom11121827] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/29/2021] [Accepted: 11/30/2021] [Indexed: 12/15/2022] Open
Abstract
Hyperbaric oxygen treatment (HBOT)—the administration of 100% oxygen at atmospheric pressure (ATA) greater than 1 ATA—increases the proportion of dissolved oxygen in the blood five- to twenty-fold. This increase in accessible oxygen places the mitochondrion—the organelle that consumes most of the oxygen that we breathe—at the epicenter of HBOT’s effects. As the mitochondrion is also a major site for the production of reactive oxygen species (ROS), it is possible that HBOT will increase also oxidative stress. Depending on the conditions of the HBO treatment (duration, pressure, umber of treatments), short-term treatments have been shown to have deleterious effects on both mitochondrial activity and production of ROS. Long-term treatment, on the other hand, improves mitochondrial activity and leads to a decrease in ROS levels, partially due to the effects of HBOT, which increases antioxidant defense mechanisms. Many diseases and conditions are characterized by mitochondrial dysfunction and imbalance between ROS and antioxidant scavengers, suggesting potential therapeutic intervention for HBOT. In the present review, we will present current views on the effects of HBOT on mitochondrial function and oxidative stress, the interplay between them and the implications for several diseases.
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Yuan Y, Zhou Y, Li Y, Hill C, Ewing RM, Jones MG, Davies DE, Jiang Z, Wang Y. Deconvolution of RNA-Seq Analysis of Hyperbaric Oxygen-Treated Mice Lungs Reveals Mesenchymal Cell Subtype Changes. Int J Mol Sci 2020; 21:E1371. [PMID: 32085618 PMCID: PMC7039706 DOI: 10.3390/ijms21041371] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 02/08/2020] [Accepted: 02/16/2020] [Indexed: 02/06/2023] Open
Abstract
Hyperbaric oxygen (HBO) is widely applied to treat several hypoxia-related diseases. Previous studies have focused on the immediate effect of HBO-exposure induced oxidative stress on the lungs, but knowledge regarding the chronic effects from repetitive HBO exposure is limited, especially at the gene expression level. We found that repetitive HBO exposure did not alter the morphology of murine lungs. However, by deconvolution of RNA-seq from those mice lungs using CIBERSORTx and the expression profile matrices of 8 mesenchymal cell subtypes obtained from bleomycin-treated mouse lungs, we identify several mesenchymal cell subtype changes. These include increases in Col13a1 matrix fibroblasts, mesenchymal progenitors and mesothelial cell populations and decreases in lipofibroblasts, endothelial and Pdgfrb high cell populations. Our data suggest that repetitive HBO exposure may affect biological processes in the lungs such as response to wounding, extracellular matrix, vasculature development and immune response.
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Affiliation(s)
- Yuan Yuan
- Department of Neurophysiology and Neuropharmacology, Institute of Special Environmental Medicine and Co-innovation Center of Neuroregeneration, Nantong University, Nantong 226019, Jiangsu, China
| | - Yilu Zhou
- Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, SO17 1BJ, UK
- Institute for Life Sciences, University of Southampton, Southampton, SO17 1BJ, UK
| | - Yali Li
- Department of Neurophysiology and Neuropharmacology, Institute of Special Environmental Medicine and Co-innovation Center of Neuroregeneration, Nantong University, Nantong 226019, Jiangsu, China
| | - Charlotte Hill
- Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, SO17 1BJ, UK
| | - Rob M Ewing
- Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, SO17 1BJ, UK
- Institute for Life Sciences, University of Southampton, Southampton, SO17 1BJ, UK
| | - Mark G Jones
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, SO16 6YD, UK
| | - Donna E Davies
- Institute for Life Sciences, University of Southampton, Southampton, SO17 1BJ, UK
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, SO16 6YD, UK
| | - Zhenglin Jiang
- Department of Neurophysiology and Neuropharmacology, Institute of Special Environmental Medicine and Co-innovation Center of Neuroregeneration, Nantong University, Nantong 226019, Jiangsu, China
| | - Yihua Wang
- Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, SO17 1BJ, UK
- Institute for Life Sciences, University of Southampton, Southampton, SO17 1BJ, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, SO16 6YD, UK
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Kapucu A, Üzüm G, Kaptan Z, Akgün-Dar K. Effects of erythropoietin pretreatment on single dose pentylentetrazole-induced seizures in rats. Biotech Histochem 2020; 95:418-427. [DOI: 10.1080/10520295.2020.1713398] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Affiliation(s)
- Ayşegul Kapucu
- Department of Biology, Faculty of Science, Istanbul University, Istanbul, Turkey
| | - Gülay Üzüm
- Department of Physiology, Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Zülal Kaptan
- Department of Physiology, Faculty of Medicine, Beykent University, Istanbul, Turkey
| | - Kadriye Akgün-Dar
- Department of Biology, Faculty of Science, Istanbul University, Istanbul, Turkey
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Dejmek J, Kohoutová M, Kripnerová M, Čedíková M, Tůma Z, Babuška V, Bolek L, Kuncová J. Repeated exposure to hyperbaric hyperoxia affects mitochondrial functions of the lung fibroblasts. Physiol Res 2019; 67:S633-S643. [PMID: 30607970 DOI: 10.33549/physiolres.934046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Hyperbaric oxygen (HBO) therapy, i.e. breathing pure oxygen under increased environmental pressures serves as a treatment for diverse medical conditions. However, elevated oxygen concentration can be detrimental to central nervous system or lungs. Our study aimed to evaluate the effects of repeated exposure to HBO on mitochondrial respiration assessed by high-resolution respirometry (HRR), cell viability estimated by PrestoBlue® reaction, morphology analyzed by routine phase contrast and fluorescent microscopy, and superoxide dismutase (SOD) and citrate synthase (CS) activities using human lung fibroblasts. The cells were exposed to HBO for 2 h per day for 5 consecutive days. One day after the last exposure, HBO cells displayed significantly smaller area and perimeter, compromised viability and elevated SOD activity. No changes were detected in CS activity or quality of mitochondrial network. HRR revealed impaired mitochondrial oxygen consumption manifested by increased leak respiration, decreased activity of complex II and compromised ATP-related oxygen consumption when fatty acids were oxidized. Our findings document that in conditions mimicking chronic intermittent exposure to HBO, lung fibroblasts suffer from compromised mitochondrial respiration linked to complex II and impaired cellular growth in spite of increased antioxidant defense. Underlying mechanism of this HBO-induced mitochondrial dysfunction should be further explored.
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Affiliation(s)
- J Dejmek
- Institute of Physiology, Faculty of Medicine in Plzeň, Charles University, Plzeň, Czech Republic.
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Sinan M, Ertan NZ, Mirasoglu B, Yalcin O, Atac N, Toklu AS, Basaran-Kucukgergin C, Baskurt OK. Acute and long-term effects of hyperbaric oxygen therapy on hemorheological parameters in patients with various disorders. Clin Hemorheol Microcirc 2016; 62:79-88. [PMID: 26410860 DOI: 10.3233/ch-151952] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Inhalation of 100% oxygen in a hyperbaric chamber has been accepted as a useful treatment for patients with various pathologies who suffer from hypoxia. The oxidative effects of hyperbaric oxygen (HBO) on RBCs have been investigated in animals but there is not enough data on hemorheological parameters in patients following HBO treatment (HBOT).In this study, we investigated the effect of HBO on hemorheological and haematological parameters during treatment. Red blood cell (RBC) deformability and aggregation, blood and plasma viscosity and superoxide dismutase activity were investigated in patients who underwent HBOT. Hematological parameters were determined by an electronic hematology analyzer. A Laser-assisted Optical Rotational Cell Analyzer (LORCA) was used to measure RBC deformability. RBC aggregation was measured for cells in autologous plasma and for cells resuspended in PBS containing Dextran70 (3% ) by using a Myrenne Aggregometer. A Wells-Brookfield cone/plate rotational viscometer was used for viscosity measurements. According to our results, a significant decrement of the hematocrit and the RBC count was observed after the 20th session of HBOT compared to the baseline, but none of the hemorheological parameters changed significantly. Our results showed that HBOT did not cause any significant changes in hemorheological parameters, thereby not representing any problems for the patients.
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Affiliation(s)
- Mukaddes Sinan
- Istanbul University, Istanbul Faculty of Medicine, Department of Physiology, Capa, Istanbul, Turkey
| | - Nesrin Zeynep Ertan
- Istanbul University, Istanbul Faculty of Medicine, Department of Physiology, Capa, Istanbul, Turkey
| | - Bengusu Mirasoglu
- Istanbul University, Istanbul Faculty of Medicine, Department of Underwater and Hyperbaric Medicine, Capa, Istanbul, Turkey
| | - Ozlem Yalcin
- Koc University, Faculty of Medicine, Department of Physiology, Sariyer, Istanbul, Turkey
| | - Nazlı Atac
- Koc University, Faculty of Medicine, Department of Physiology, Sariyer, Istanbul, Turkey
| | - Akin Savas Toklu
- Istanbul University, Istanbul Faculty of Medicine, Department of Underwater and Hyperbaric Medicine, Capa, Istanbul, Turkey
| | - Canan Basaran-Kucukgergin
- Istanbul University, Istanbul Faculty of Medicine, Department of Biochemistry, Capa, Istanbul, Turkey
| | - Oguz Kerim Baskurt
- Koc University, Faculty of Medicine, Department of Physiology, Sariyer, Istanbul, Turkey
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Poyrazoglu Y, Topal T, Yuksel R, Bircan FS, Simsek K, Gocgeldi E, Ersoz N, Korkmaz A. Effects of Hyperbaric Oxygen and Preconditioning on Wound Healing in Colonic Anastomoses. J INVEST SURG 2015; 28:188-95. [DOI: 10.3109/08941939.2014.999961] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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ISHIBASHI M, HAYASHI A, AKIYOSHI H, OHASHI F. The influences of hyperbaric oxygen therapy with a lower pressure and oxygen concentration than previous methods on physiological mechanisms in dogs. J Vet Med Sci 2015; 77:297-304. [PMID: 25482821 PMCID: PMC4383775 DOI: 10.1292/jvms.14-0316] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 11/05/2014] [Indexed: 01/07/2023] Open
Abstract
Recently, hyperbaric oxygen therapy with a lower pressure and oxygen concentration (L-HBOT) than previous methods has been used for dogs in Japan; however, the influences of L-HBOT on dogs have not been clarified. To verify the influences of L-HBOT on physiological mechanism in dogs, we investigated blood gas parameters, glutathione peroxidase (GPx) activity, heart rate variability, stress-related hormones and skin conductance (SC) in 4 clinically normal beagle dogs with catheters in their carotid arteries and jugular veins when they were quiet, after running, after receiving L-HBOT (30% oxygen concentration, 1.3 atmospheres absolute, 30 min) or after not receiving L-HBOT. The results showed there were no changes in blood gas parameters, heart rate variability and catecholamine levels after L-HBOT. GPx activity was significantly higher, and the SC and cortisol level were lower in dogs that received L-HBOT than those when they were quiet. These results suggested that L-HBOT may have a small influence on oxygenation dynamics, activate antioxidant enzymes such as GPx, restrain autonomic nervous activity and control the balance between oxidation and antioxidation inside the body.
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Affiliation(s)
- Maki ISHIBASHI
- Department of Veterinary Clinical Medicine, Graduate School
of Life and Environmental Sciences, Osaka Prefecture University, 1–58 Rinku-ohrai-kita,
Izumisano, Osaka 598–8531, Japan
| | - Akiyoshi HAYASHI
- Department of Veterinary Clinical Medicine, Graduate School
of Life and Environmental Sciences, Osaka Prefecture University, 1–58 Rinku-ohrai-kita,
Izumisano, Osaka 598–8531, Japan
| | - Hideo AKIYOSHI
- Department of Veterinary Clinical Medicine, Graduate School
of Life and Environmental Sciences, Osaka Prefecture University, 1–58 Rinku-ohrai-kita,
Izumisano, Osaka 598–8531, Japan
| | - Fumihito OHASHI
- Department of Veterinary Clinical Medicine, Graduate School
of Life and Environmental Sciences, Osaka Prefecture University, 1–58 Rinku-ohrai-kita,
Izumisano, Osaka 598–8531, Japan
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Arieli Y, Kotler D, Eynan M, Hochman A. Hyperbaric oxygen preconditioning protects rats against CNS oxygen toxicity. Respir Physiol Neurobiol 2014; 197:29-35. [DOI: 10.1016/j.resp.2014.03.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2013] [Revised: 02/03/2014] [Accepted: 03/18/2014] [Indexed: 11/28/2022]
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Drenjancevic I, Kibel A. Restoring Vascular Function with Hyperbaric Oxygen Treatment: Recovery Mechanisms. J Vasc Res 2013; 51:1-13. [DOI: 10.1159/000355925] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 09/05/2013] [Indexed: 11/19/2022] Open
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Atis A, Aydin Y, Ciftci F, Sakız D, Arslan A, Toklu AS, Donmez M, Goker N. Hyberbaric oxygen increases atresia in normal & steroid induced PCO rat ovaries. Reprod Biol Endocrinol 2012; 10:11. [PMID: 22309835 PMCID: PMC3395821 DOI: 10.1186/1477-7827-10-11] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2011] [Accepted: 02/06/2012] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In this study, we investigated the effect of hyperbaric oxygen therapy (HBOT) on the morphology of estradiol valerate (EV) induced polycystic ovary (PCO) to find a new treatment modality for improvement of PCO. METHODS The rats were divided into four groups. Group1, control; group 2, PCO group; group 3, PCO with HBOT group and group 4, normal ovary with HBOT. PCO was induced by a single intramuscular injection of 4 mg EV in adult cycling rats. Other rats with normal ovaries had oil injection as placebo. HBOT was applied to third and fourth groups for six weeks. Histopathologic evaluation of ovaries of all groups were performed & compared. RESULTS Six weeks of HBOT was resulted in increase in follicular atresia, decrease in the number of primary, secondary, tertiary follicles and decrease in the number of fresh corpus luteum in normal rat ovary. HBOT on polycystic rat ovary, resulted in significant increase in atretic follicles which were already present. CONCLUSIONS HBOT of six weeks itself, changed ovarian morphology in favor of atresia both in PCO group and control group. This result of aggravated follicular atresia after HBOT on EV induced PCO may be due to long-term exposure in our protocol which with this state seems to be inapplicable in the improvement of PCO morphology.
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Affiliation(s)
- Alev Atis
- Sisli Etfal Training & Research Hospital Obstetrics & Gynecology, Istanbul, Turkey
| | - Yavuz Aydin
- Istanbul University Medicosocial Unit Department of Obstetrics & Gynecology, Istanbul, Turkey
| | - Filiz Ciftci
- Sisli Etfal Training & Research Hospital Obstetrics & Gynecology, Istanbul, Turkey
| | - Damlanur Sakız
- Sisli Etfal Training & Research Hospital Department of Pathology, Istanbul, Turkey
| | - Abdullah Arslan
- Istanbul University Faculty of Medicine, Department of Underwater and Hyperbaric Medicine, Istanbul, Turkey
| | - Akın S Toklu
- Istanbul University Faculty of Medicine, Department of Underwater and Hyperbaric Medicine, Istanbul, Turkey
| | - Melahat Donmez
- Sisli Etfal Training & Research Hospital Obstetrics & Gynecology, Istanbul, Turkey
| | - Nimet Goker
- Sisli Etfal Training & Research Hospital Obstetrics & Gynecology, Istanbul, Turkey
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Simsek K, Ay H, Topal T, Ozler M, Uysal B, Ucar E, Acikel CH, Yesilyurt O, Korkmaz A, Oter S, Yildiz S. Long-term exposure to repetitive hyperbaric oxygen results in cumulative oxidative stress in rat lung tissue. Inhal Toxicol 2011; 23:166-72. [PMID: 21391785 DOI: 10.3109/08958378.2011.558528] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CONTEXT Despite its known benefits, hyperbaric oxygen (HBO) is also reported to enhance the production of reactive oxygen species and can cause oxidative stress in several tissues. Previous studies had shown that HBO-induced oxidative stress is directly proportional to both its exposure pressure and duration. Nevertheless, these studies were usually performed with single-session HBO exposure but its clinical use commonly depends on long-term exposure periods. OBJECTIVE To clarify the oxidative effect of long-term repetitive HBO in the lung tissue of rats. MATERIALS AND METHODS Male Sprague-Dawley rats were divided into six study groups exposed to consecutive HBO sessions (2.8 atm/90 min) for 5, 10, 15, 20, 30, and 40 days. Animals were sacrificed 24 h after the last HBO session. An additional control group was set to obtain normal data. Lung malondialdehyde (MDA) and carbonylated protein (PCC) levels were determined as measures of oxidative stress along with the activities of the antioxidant enzymes superoxide dismutase (SOD) and glutathione peroxidase. RESULTS None of the measured parameters showed any changes among the groups exposed to 5-15 HBO sessions. However, MDA, PCC, and SOD were found to be significantly increased in the 20 to 40 session groups. DISCUSSION AND CONCLUSION These results indicate that repetitive treatment with HBO may cause oxidative stress in critical tissues including the lung. Although HBO-mediated free radicals are accepted to be responsible for the benefits of this therapeutic modality, especially in cases with prolonged exposure, possible injurious effects of supranormal values of bio-oxidative products need to be considered.
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Affiliation(s)
- Kemal Simsek
- Gulhane Military Medical Academy, Department of Undersea and Hyperbaric Medicine, Ankara, Turkey
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Koca K, Yurttas Y, Bilgic S, Cayci T, Topal T, Durusu M, Kaldirim U, Akgul EO, Ozkan H, Yanmis I, Oguz E, Tunay S, Korkmaz A, Basbozkurt M. Effect of preconditioned hyperbaric oxygen and ozone on ischemia-reperfusion induced tourniquet in skeletal bone of rats. J Surg Res 2010; 164:e83-9. [PMID: 20850777 DOI: 10.1016/j.jss.2010.06.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2010] [Revised: 05/29/2010] [Accepted: 06/28/2010] [Indexed: 11/15/2022]
Abstract
BACKGROUND The aim of the study was to investigate effect of I/R injury on bone tissue and protective role of hyperbaric oxygen precondition (HBO-PC) and ozone precondition (O(3)-PC) on I/R injury by using biochemical analysis. MATERIALS AND METHODS Thirty-two rats were included in study. The animals were divided into four equal groups: sham operation, I/R, I/R+HBO and I/R+O(3). One session of 60 min, 3 ATA, 3-4 L/min, 100% oxygenation was defined as one dose of HBO. First dose of HBO was administrated 72 h before ischemia. Subsequent, one-dose of HBO administrated per 12 hours until ischemia time (total seven doses); 0.7 mg/kg ozone/oxygen mixture intraperitoneally was defined as one dose of ozone. First dose of O(3) was administered 72 h before ischemia (total four doses). I/R model was induced in anesthetized rats by unilateral (right) femoral artery clipping for 2 h followed by 22 h of reperfusion. The right tibia and were harvested. Tissue was assayed for levels of malondialdehyde (MDA) and protein carbonyl (PCO), activities of superoxide dismutase (SOD), and glutathione peroxidase (GSH-Px). RESULTS MDA and PCO levels were increased in I/R group. SOD activity was increased; GSH-Px activity was decreased in I/R group. MDA and PCO levels were decreased, SOD and GSH-Px activities were increased in both HBO+I/R and O(3)+I/R groups. CONCLUSION It has been shown that levels of MDA and PCO in bone were increased followed by 2 h of ischemia and 22 h of reperfusion period. Ozone-PC and HBO-PC has protective effect against skeletal bone I/R injury by decreasing levels of MDA and PCO, increasing activities of SOD and GSH-Px in rats.
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Affiliation(s)
- Kenan Koca
- Department of Orthopaedic Surgery, Gulhane Military Medical Academy, Etlik-Ankara, Turkey.
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Effect of hyperbaric oxygen treatment on oxidative stress in patients having diabetes mellitus type 2. ACTA ACUST UNITED AC 2009; 62:225-30. [DOI: 10.2298/mpns0906225t] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Introduction The aim of our study was to investigate the influence of breathing oxygen under high pressure on potential prooxidative activity in diabetic patients with serious vascular complications. Material and methods 24 patients with diabetes mellitus type 2, were divided into two groups, 12 patients each, by degree of peripheral vascular complications (by Wagner's scale). The group I was composed of 4 women and 8 men, their average age being 70 years, and average Diabetes duration of 12 years, without clinically manifest peripheral vascular complication (Wagner 0). The group II was composed of 4 women and 8 men, their average age being 74 years, and average illness duration of 17 years, having peripheral vascular complications, classified by Wagner's scale 1-5. Blood samples for biochemical analysis were taken before the therapy, then on the 3rd, 5th, 7th and 10th day of hyperbaric oxygenation treatment. The values of superoxide anion radical (O-), hydrogen peroxide (H2O2) and TBARS as a parameter of lipid peroxidation were measured during the HBOt. All examined patients were treated with the same therapy protocol (10 HBO treatments, under pressure of 1.7-2.2 bar, in duration of 60 minutes). The therapy was provided in monoplace oxygen hyperbaric chamber. Results The obtained results show no statistically significant increase in the values of O2-, H2O2, TBARS during the HBOt compared to the values before the HBOt. However, O2-, H2O2 were significantly reduced after HBOt. Conclusion On the basis of these data, we can conclude that the use of oxygen under high pressure has no influence on the increased prooxidative activities in diabetic patients during and after HBOt, disregarding the degree of the present vascular damages.
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Effects of bone disease and calcium supplementation on antioxidant enzymes in postmenopausal women. Clin Biochem 2008; 41:69-74. [DOI: 10.1016/j.clinbiochem.2007.10.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2007] [Revised: 10/17/2007] [Accepted: 10/18/2007] [Indexed: 11/19/2022]
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Korkmaz A, Oter S, Sadir S, Topal T, Uysal B, Ozler M, Ay H, Akin A. Exposure time related oxidative action of hyperbaric oxygen in rat brain. Neurochem Res 2007; 33:160-6. [PMID: 17710543 DOI: 10.1007/s11064-007-9428-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2007] [Accepted: 06/26/2007] [Indexed: 12/21/2022]
Abstract
Hyperbaric oxygen (HBO) is known to cause oxidative stress in several organs and tissues. Due to its high rate of blood flow and oxygen consumption, the brain is one of the most sensitive organs to this effect. The present study was performed to elucidate the relation of HBO exposure time to its oxidative effects in rats' brain cortex tissue. For this purpose, 49 rats were randomly divided into five groups. Except the control group, study groups were subjected to three atmospheres HBO for 30, 60, 90, and 120 min. Their cerebral cortex layer was taken immediately after exposure and used for analysis. Thiobarbituric acid reactive substances (TBARS), superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and nitrate-nitrite (NOX) levels were determined. TBARS and SOD levels were found to increase in a time-dependent manner. GSH-Px activity reflected an inconsistent course. NOX levels were found to be increased only in the 120 min exposed group. The results of this study suggests that HBO induced oxidative effects are strongly related with exposure time.
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Affiliation(s)
- Ahmet Korkmaz
- Department of Physiology, Gülhane Askeri Tip Akademisi, Fizyoloji Anabilim Dali, 06018 Ankara, Turkey
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