1
|
Ruan H, Li X, Zhou L, Zheng Z, Hua R, Wang X, Wang Y, Fan Y, Guo S, Wang L, Ur Rahman S, Wang Z, Wei Y, Yu S, Zhang R, Cheng Q, Sheng J, Li X, Liu X, Yuan R, Zhang X, Chen L, Xu G, Guan Y, Nie J, Qin H, Zheng F. Melatonin decreases GSDME mediated mesothelial cell pyroptosis and prevents peritoneal fibrosis and ultrafiltration failure. SCIENCE CHINA. LIFE SCIENCES 2024; 67:360-378. [PMID: 37815699 DOI: 10.1007/s11427-022-2365-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Accepted: 05/12/2023] [Indexed: 10/11/2023]
Abstract
Peritoneal fibrosis together with increased capillaries is the primary cause of peritoneal dialysis failure. Mesothelial cell loss is an initiating event for peritoneal fibrosis. We find that the elevated glucose concentrations in peritoneal dialysate drive mesothelial cell pyroptosis in a manner dependent on caspase-3 and Gasdermin E, driving downstream inflammatory responses, including the activation of macrophages. Moreover, pyroptosis is associated with elevated vascular endothelial growth factor A and C, two key factors in vascular angiogenesis and lymphatic vessel formation. GSDME deficiency mice are protected from high glucose induced peritoneal fibrosis and ultrafiltration failure. Application of melatonin abrogates mesothelial cell pyroptosis through a MT1R-mediated action, and successfully reduces peritoneal fibrosis and angiogenesis in an animal model while preserving dialysis efficacy. Mechanistically, melatonin treatment maintains mitochondrial integrity in mesothelial cells, meanwhile activating mTOR signaling through an increase in the glycolysis product dihydroxyacetone phosphate. These effects together with quenching free radicals by melatonin help mesothelial cells maintain a relatively stable internal environment in the face of high-glucose stress. Thus, Melatonin treatment holds some promise in preserving mesothelium integrity and in decreasing angiogenesis to protect peritoneum function in patients undergoing peritoneal dialysis.
Collapse
Affiliation(s)
- Hongxia Ruan
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China
| | - Xuejuan Li
- Department of Nephrology, Second Hospital, Dalian Medical University, Dalian, 116023, China.
- Wuhu Hospital and Health Science Center, East China Normal University, Shanghai, 200241, China.
| | - Lina Zhou
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Zihan Zheng
- Chongqing International Institute for Immunology, Chongqing, 401320, China
| | - Rulin Hua
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China
| | - Xu Wang
- Department of Nephrology, Shenzhen Hospital, Southern Medical University, Shenzhen, 518101, China
| | - Yuan Wang
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China
| | - Yujie Fan
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China
| | - Shuwen Guo
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China
| | - Lihua Wang
- Department of Nephrology, Second Hospital, Dalian Medical University, Dalian, 116023, China
| | - Shafiq Ur Rahman
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China
| | - Ziwei Wang
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China
| | - Yuyuan Wei
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China
| | - Shuangyan Yu
- Department of Nephrology, Second Hospital, Dalian Medical University, Dalian, 116023, China
| | - Rongzhi Zhang
- Department of Nephrology, Second Hospital, Dalian Medical University, Dalian, 116023, China
| | - Qian Cheng
- Department of Nephrology, Second Hospital, Dalian Medical University, Dalian, 116023, China
| | - Jie Sheng
- Department of Nephrology, Second Hospital, Dalian Medical University, Dalian, 116023, China
| | - Xue Li
- Department of Nephrology, Second Hospital, Dalian Medical University, Dalian, 116023, China
| | - Xiaoyan Liu
- Department of Nephrology, Second Hospital, Dalian Medical University, Dalian, 116023, China
| | - Ruqiang Yuan
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China
| | - Xiaoyan Zhang
- Wuhu Hospital and Health Science Center, East China Normal University, Shanghai, 200241, China
| | - Lihong Chen
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China
- Wuhu Hospital and Health Science Center, East China Normal University, Shanghai, 200241, China
| | - Guowang Xu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Youfei Guan
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China
- Wuhu Hospital and Health Science Center, East China Normal University, Shanghai, 200241, China
| | - Jing Nie
- Peking University First Hospital, Peking University, Beijing, 100034, China
| | - Hongqiang Qin
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
| | - Feng Zheng
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China.
- Department of Nephrology, Second Hospital, Dalian Medical University, Dalian, 116023, China.
- Wuhu Hospital and Health Science Center, East China Normal University, Shanghai, 200241, China.
| |
Collapse
|
2
|
Song J, Ouyang F, Xiong Y, Luo Q, Jiang H, Fan L, Zhang Z. Reassessment of oxidative stress in idiopathic sudden hearing loss and preliminary exploration of the effect of physiological concentration of melatonin on prognosis. Front Neurol 2023; 14:1249312. [PMID: 37745649 PMCID: PMC10511764 DOI: 10.3389/fneur.2023.1249312] [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: 06/28/2023] [Accepted: 08/18/2023] [Indexed: 09/26/2023] Open
Abstract
Background and purpose The pathogenesis of idiopathic sudden sensorineural hearing loss (ISSNHL) is still unclear, and there is no targeted treatment. This research aimed to verify the role of oxidative stress in ISSNHL and explore whether melatonin has a protective effect on hearing. Materials and methods A total of 43 patients with ISSNHL and 15 healthy controls were recruited to detect the level of melatonin, reactive oxygen species (ROS), and total antioxidant capacity (TAC) in the blood and compared before and after treatment. Multivariate logistic regression models were performed to assess the factors relevant to the occurrence and improvement of ISSNHL. Results The patients with ISSNHL showed significantly higher ROS levels than controls (4.42 ± 4.40 vs. 2.30 ± 0.59; p = 0.031). The levels of basal melatonin were higher (1400.83 ± 784.89 vs. 1095.97 ± 689.08; p = 0.046) and ROS levels were lower (3.05 ± 1.81 vs. 5.62 ± 5.56; p = 0.042) in the effective group as compared with the ineffective group. Logistic regression analysis showed that melatonin (OR = 0.999, 95% CI 0.997-1.000, p = 0.049), ROS (OR = 1.154, 95% CI 1.025-2.236, p = 0.037), and vertigo (OR = 3.011, 95% CI 1.339-26.983, p = 0.019) were independent factors associated with hearing improvement. Besides, the level of melatonin (OR = 0.999, 95% CI 0.998-1.000, p = 0.023) and ROS (OR = 3.248, 95% CI 1.109-9.516, p = 0.032) were associated with the occurrence of ISSNHL. Conclusion Our findings may suggest oxidative stress involvement in ISSNHL etiopathogenesis. The level of melatonin and ROS, and vertigo appear to be predictive of the effectiveness of hearing improvement following ISSNHL treatment.
Collapse
Affiliation(s)
- Jianxiong Song
- Department of Otolaryngology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Fang Ouyang
- Department of Endocrinology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yuanping Xiong
- Department of Otolaryngology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Qing Luo
- Department of Otolaryngology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Hongqun Jiang
- Department of Otolaryngology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Li Fan
- Department of Otolaryngology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Zhiyuan Zhang
- Department of Otolaryngology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| |
Collapse
|
3
|
Ávila C, Vinay JI, Arese M, Saso L, Rodrigo R. Antioxidant Intervention against Male Infertility: Time to Design Novel Strategies. Biomedicines 2022; 10:biomedicines10123058. [PMID: 36551814 PMCID: PMC9775742 DOI: 10.3390/biomedicines10123058] [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: 09/30/2022] [Revised: 11/21/2022] [Accepted: 11/24/2022] [Indexed: 11/29/2022] Open
Abstract
Infertility is a highly prevalent condition, affecting 9-20% of couples worldwide. Among the identifiable causes, the male factor stands out in about half of infertile couples, representing a growing problem. Accordingly, there has been a decline in both global fertility rates and sperm counts in recent years. Remarkably, nearly 80% of cases of male infertility (MI) have no clinically identifiable aetiology. Among the mechanisms likely plausible to account for idiopathic cases, oxidative stress (OS) has currently been increasingly recognized as a key factor in MI, through phenomena such as mitochondrial dysfunction, lipid peroxidation, DNA damage and fragmentation and finally, sperm apoptosis. In addition, elevated reactive oxygen species (ROS) levels in semen are associated with worse reproductive outcomes. However, despite an increasing understanding on the role of OS in the pathophysiology of MI, therapeutic interventions based on antioxidants have not yet provided a consistent benefit for MI, and there is currently no clear consensus on the optimal antioxidant constituents or regimen. Therefore, there is currently no applicable antioxidant treatment against this problem. This review presents an approach aimed at designing an antioxidant strategy based on the particular biological properties of sperm and their relationships with OS.
Collapse
Affiliation(s)
- Cristóbal Ávila
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago 8380000, Chile
| | - José Ignacio Vinay
- Urology Department, University of Chile Clinical Hospital, Santiago 8380000, Chile
- Andrology Unit, Shady Grove Fertility, Santiago 7650672, Chile
| | - Marzia Arese
- Department of Biochemical Sciences “A. Rossi-Fanelli”, Sapienza University of Rome, 00185 Rome, Italy
| | - Luciano Saso
- Department of Physiology and Pharmacology “Vittorio Erspamer”, Faculty of Pharmacy and Medicine, Sapienza University, 00185 Rome, Italy
| | - Ramón Rodrigo
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago 8380000, Chile
- Correspondence: ; Tel.: +56-229-786-126
| |
Collapse
|
4
|
Reiter RJ, Rosales-Corral S, Tan DX, Jou MJ, Galano A, Xu B. Melatonin as a mitochondria-targeted antioxidant: one of evolution's best ideas. Cell Mol Life Sci 2017; 74:3863-3881. [PMID: 28864909 PMCID: PMC11107735 DOI: 10.1007/s00018-017-2609-7] [Citation(s) in RCA: 344] [Impact Index Per Article: 49.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 08/03/2017] [Indexed: 01/27/2023]
Abstract
Melatonin is an ancient antioxidant. After its initial development in bacteria, it has been retained throughout evolution such that it may be or may have been present in every species that have existed. Even though it has been maintained throughout evolution during the diversification of species, melatonin's chemical structure has never changed; thus, the melatonin present in currently living humans is identical to that present in cyanobacteria that have existed on Earth for billions of years. Melatonin in the systemic circulation of mammals quickly disappears from the blood presumably due to its uptake by cells, particularly when they are under high oxidative stress conditions. The measurement of the subcellular distribution of melatonin has shown that the concentration of this indole in the mitochondria greatly exceeds that in the blood. Melatonin presumably enters mitochondria through oligopeptide transporters, PEPT1, and PEPT2. Thus, melatonin is specifically targeted to the mitochondria where it seems to function as an apex antioxidant. In addition to being taken up from the circulation, melatonin may be produced in the mitochondria as well. During evolution, mitochondria likely originated when melatonin-forming bacteria were engulfed as food by ancestral prokaryotes. Over time, engulfed bacteria evolved into mitochondria; this is known as the endosymbiotic theory of the origin of mitochondria. When they did so, the mitochondria retained the ability to synthesize melatonin. Thus, melatonin is not only taken up by mitochondria but these organelles, in addition to many other functions, also probably produce melatonin as well. Melatonin's high concentrations and multiple actions as an antioxidant provide potent antioxidant protection to these organelles which are exposed to abundant free radicals.
Collapse
Affiliation(s)
- Russel J Reiter
- Department of Cell Systems and Anatomy, UT Health San Antonio, San Antonio, TX, 78229, USA.
| | - Sergio Rosales-Corral
- Centro de Investigacion Biomedica de Occidente, Del Instituto Mexicana del Seguro Social, 44340, Guadalajara, Mexico
| | - Dun Xian Tan
- Department of Cell Systems and Anatomy, UT Health San Antonio, San Antonio, TX, 78229, USA
| | - Mei Jie Jou
- Department of Physiology and Pharmacology, College of Medicine, Chang Gung University, Taoyüan, Taiwan
- Department of Neurology, Kee-Lung Medical Center, Chang Gung Memorial Hospital, Keelung, Taiwan
| | - Annia Galano
- Departemento de Quimica, Uninversidad Autonoma Metropolitana-Iztapalapa, 09340, Mexico City, Mexico
| | - Bing Xu
- Department of Cell Systems and Anatomy, UT Health San Antonio, San Antonio, TX, 78229, USA
| |
Collapse
|
5
|
Eynan M, Biram A, Mullokandov M, Kronfeld-Schor N, Paz-Cohen R, Menajem D, Arieli Y. The transition from day-to-night activity is a risk factor for the development of CNS oxygen toxicity in the diurnal fat sand rat (Psammomys obesus). Chronobiol Int 2017; 34:578-586. [PMID: 28156158 DOI: 10.1080/07420528.2017.1281822] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Performance and safety are impaired in employees engaged in shift work. Combat divers who use closed-circuit oxygen diving apparatus undergo part of their training during the night hours. The greatest risk involved in diving with such apparatus is the development of central nervous system oxygen toxicity (CNS-OT). We investigated whether the switch from day-to-night activity may be a risk factor for the development of CNS-OT using a diurnal animal model, the fat sand rat (Psammomys obesus). Animals were kept on a 12:12 light-dark schedule (6 a.m. to 6 p.m. at 500 lx). The study included two groups: (1) Control group: animals were kept awake and active during the day, between 09:00 and 15:00. (2) Experimental group: animals were kept awake and active during the night, between 21:00 and 03:00, when they were exposed to dim light in order to simulate the conditions prevalent during combat diver training. This continued for a period of 3 weeks, 5 days a week. On completion of this phase, 6-sulphatoxymelatonin (6-SMT) levels in urine were determined over a period of 24 h. Animals were then exposed to hyperbaric oxygen (HBO). To investigate the effect of acute melatonin administration, melatonin (50 mg/kg) or its vehicle was administered to the animals in both groups 20 min prior to HBO exposure. After the exposure, the activity of superoxide dismutase, catalase and glutathione peroxidase was measured, as were the levels of neuronal nitric oxide synthase (nNOS) and overall nitrotyrosylation in the cortex and hippocampus. Latency to CNS-OT was significantly reduced after the transition from day-to-night activity. This was associated with alterations in the level of melatonin metabolites secreted in the urine. Acute melatonin administration had no effect on latency to CNS-OT in either of the groups. Nevertheless, the activity of superoxide dismutase and catalase, as well as nitrotyrosine and nNOS levels, were altered in the hippocampus following melatonin administration. On the basis of these results, we suggest that a switch from diurnal to nocturnal activity may represent an additional risk factor for the development of CNS-OT. Utilizing a diurnal animal model may contribute to our understanding of the heightened risk of developing CNS-OT when diving with closed-circuit oxygen apparatus at night.
Collapse
Affiliation(s)
- Mirit Eynan
- a Israel Naval Medical Institute , IDF Medical Corps , Haifa , Israel
| | - Adi Biram
- a Israel Naval Medical Institute , IDF Medical Corps , Haifa , Israel
| | | | | | - Rotem Paz-Cohen
- b Department of Zoology , Tel Aviv University , Tel Aviv , Israel
| | - Dvir Menajem
- a Israel Naval Medical Institute , IDF Medical Corps , Haifa , Israel
| | - Yehuda Arieli
- a Israel Naval Medical Institute , IDF Medical Corps , Haifa , Israel
| |
Collapse
|
6
|
Wang B, Min Z, Yuan J. Apparent ileal digestible tryptophan requirements of 22- to 42-day-old broiler chicks. J APPL POULTRY RES 2016. [DOI: 10.3382/japr/pfv061] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
7
|
Vriend J, Reiter RJ. The Keap1-Nrf2-antioxidant response element pathway: a review of its regulation by melatonin and the proteasome. Mol Cell Endocrinol 2015; 401:213-20. [PMID: 25528518 DOI: 10.1016/j.mce.2014.12.013] [Citation(s) in RCA: 177] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Accepted: 12/12/2014] [Indexed: 12/20/2022]
Abstract
Both melatonin and proteasome inhibitors upregulate antioxidant enzymes including superoxide dismutase (SOD), glutathione peroxidase (GP), hemoxygenase 1 (HO-1), and NADPH:quinone oxidoreductase (NQO1). Recent evidence suggests that the antioxidant action of both melatonin and proteasome inhibitors involves the Keap1-ARE (Keap1 antioxidant response element) pathway via the upregulation of Nrf2. Melatonin and proteasome inhibitors suppress the degradation of Nrf2 and also enhance its nuclear translocation. In the nucleus Nrf2, together with a cofactor, stimulates the transcription of antioxidant enzymes and detoxifying enzymes. The ligase (E3) complex (Keap1-Cul3-Rbx1) responsible for ubiquitinating Nrf2, prior to proteasomal degradation, also ubiquitinates IkB kinase and the antiapoptotic factor Bcl-2, and possibly additional proteins. In various systems, NF-κB, which is inhibited by IkBα, is downregulated by proteasome inhibitors as well as by melatonin. Similarly in leukemic cells, Bcl-2 is down-regulated by the proteasome inhibitor, bortezomib, and also by melatonin. Thus melatonin administration modulates the activity of three separate substrates of the Keap1-Cul3-Rbx1 ubiquitin ligase. These facts could be accounted for by the hypothesis that melatonin interacts with the ubiquitin ligase complex or, more likely, by the hypothesis that melatonin acts as a proteasome inhibitor. A recent study documented that melatonin acts as a proteasome inhibitor in cancer cells as well as inhibiting chymotrypsin-like activity in cell-free systems of these cells. Further studies, however, are needed to clarify the interaction of melatonin and the ubiquitin-proteasome system as they relate to oxidative stress.
Collapse
Affiliation(s)
- Jerry Vriend
- Department of Human Anatomy and Cell Science, University of Manitoba, Winnipeg, MB, Canada.
| | - Russel J Reiter
- Department of Cellular and Structural Biology, University of Texas Health Science Center at San Antonio, TX, United States
| |
Collapse
|
8
|
Wang B, Min Z, Yuan J, Zhang B, Guo Y. Effects of dietary tryptophan and stocking density on the performance, meat quality, and metabolic status of broilers. J Anim Sci Biotechnol 2014; 5:44. [PMID: 25705377 PMCID: PMC4335389 DOI: 10.1186/2049-1891-5-44] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Accepted: 09/22/2014] [Indexed: 11/30/2022] Open
Abstract
Background Highly automated cage-rearing systems are becoming increasingly popular in China. However, a high stocking density can cause oxidative stress and decrease broiler performance. The tryptophan (TRP) derivative 5-hydroxytryptophan (5-HT) has been shown to preserve membrane fluidity in birds suffering from oxidative stress. Therefore, this experiment was conducted to determine the effects of dietary TRP supplementation on performance, breast meat quality and oxidative stress in broilers reared in cages with a high or low stocking density. Methods Female Arbor Acres broilers (25-d-old, n = 144) were randomly allocated to 1 of 4 treatments. The birds were fed a diet based on corn, soybean meal, cottonseed meal and corn gluten meal containing either 0.18 or 0.27% TRP and were housed with stocking densities of 11 or 15.4 birds/m2 in a 2 × 2 factorial experiment. Broiler performance was evaluated from d 25 to 42. Eight birds from each treatment were slaughtered on d 42 and plasma and breast muscle samples were collected to measure biochemical indices. Results A higher stocking density tended to be associated with reduced weight gain (P < 0.10), and significantly increased plasma glutamic-pyruvic transaminase (GPT) activity (P < 0.001). Increased dietary TRP significantly reduced the activities of lactic dehydrogenase and GPT while increasing total cholesterol in the plasma (P < 0.01), reducing drip loss of breast muscle (P < 0.10) and improving feed efficiency (P < 0.10). Conclusions An increase in dietary TRP, 1.5-fold higher than the standard supplementation level, can alleviate oxidative stress as well as improve welfare and feed efficiency in broilers reared in cages with a high stocking density.
Collapse
Affiliation(s)
- Bo Wang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Zhizhi Min
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Jianmin Yuan
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Bingkun Zhang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Yuming Guo
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| |
Collapse
|
9
|
Simsek K, Ozler M, Yildirim AO, Sadir S, Demirbas S, Oztosun M, Korkmaz A, Ay H, Oter S, Yildiz S. Evaluation of the oxidative effect of long-term repetitive hyperbaric oxygen exposures on different brain regions of rats. ScientificWorldJournal 2012; 2012:849183. [PMID: 22454610 PMCID: PMC3289899 DOI: 10.1100/2012/849183] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2011] [Accepted: 12/11/2011] [Indexed: 11/17/2022] Open
Abstract
Hyperbaric oxygen (HBO2) exposure affects both oxidative and antioxidant systems. This effect is positively correlated with the exposure time and duration of the treatment. The present study aims enlightening the relation of HBO2 with oxidative/antioxidant systems when administered in a prolonged and repetitive manner in brain tissues of rats. Sixty rats were divided into 6 study (n = 8 for each) and 1 control (n = 12) group. Rats in the study groups were daily exposed 90-min HBO2 sessions at 2.8 ATA for 5, 10, 15, 20, 30 and 40 days. One day after the last session, animals were sacrificed; their whole brain tissue was harvested and dissected into three different regions as the outer grey matter (cortex), the inner white matter and cerebellum. Levels of lipid peroxidation and protein oxidation and activities of superoxide dismutase and glutathione peroxidase were measured in these tissues. Malondialdehyde, carbonylated protein and glutathione peroxidase levels were found to be insignificantly increased at different time-points in the cerebral cortex, inner white matter and cerebellum, respectively. These comparable results provide evidence for the safety of HBO treatments and/or successful adaptive mechanisms at least in the brain tissue of rats, even when administered for longer periods.
Collapse
Affiliation(s)
- Kemal Simsek
- Department of Undersea and Hyperbaric Medicine, Gulhane Military Medical Academy, 06010 Etlik, Ankara, Turkey.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Ozler M, Akay C, Oter S, Ay H, Korkmaz A. Similarities and differences of hyperbaric oxygen and medical ozone applications. Free Radic Res 2011; 45:1267-78. [PMID: 21955297 DOI: 10.3109/10715762.2011.627331] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Hyperbaric oxygen (HBO) treatment is based on the principle of having the patient breath 100% oxygen in an environment above atmospheric pressure. Ozone (O(3)) is a colourless gas with a specific odour and consists of three oxygen atoms. The classical scientific understanding is that the world has become a place suitable for life for aerobic organisms with the increasing oxygen in the atmosphere billions of years ago. The formation of ozone after oxygen has then protected aerobic creatures from harmful rays. We now use these two gases for treatment purposes. It is noteworthy that the oxygen and ozone molecules that are formed by the same atom in different numbers are used for similar medical indications. We will try to emphasize the similarities and differences of HBO and medical ozone applications in this article.
Collapse
Affiliation(s)
- Mehmet Ozler
- Department of Physiology, Gulhane Military Medical Academy, Ankara, Turkey.
| | | | | | | | | |
Collapse
|
11
|
Effect of long-term normobaric hyperoxia on oxidative stress in mitochondria of the guinea pig brain. Neurochem Res 2011; 36:1475-81. [PMID: 21503666 DOI: 10.1007/s11064-011-0473-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/06/2011] [Indexed: 12/27/2022]
Abstract
Normobaric hyperoxia (NBO) is applied for treatment of various clinical conditions related to hypoxia, but it can potentially also induce generation of reactive oxygen species, causing cellular damage. In this study, we examined the effects of 60 h NBO treatment on lipid and protein oxidative damage and activity of superoxide dismutase (Mn-SOD) in brain mitochondria of guinea pigs. Despite significant stimulation of Mn-SOD expression and activity the NBO treatment resulted in accumulation of markers of oxidative lesions, including lipid peroxidation (conjugated dienes, thiobarbituric acid reactive substances) and protein modification (bityrosines, adducts with lipid peroxidation products, oxidized thiols). When inhaled O(2) was enriched with oxygen cation, O (2) (•+) , the Mn-SOD expression and activity were stimulated to similar extend, but lipid peroxidation and protein oxidation were prevented. These results suggest that long-term NBO treatment causes oxidative stress, but enrichment of inhaled oxygen by oxygen cation can protect the brain again adverse effects of hyperoxia.
Collapse
|
12
|
Melatonin Modulates Hippocampus NMDA Receptors, Blood and Brain Oxidative Stress Levels in Ovariectomized Rats. J Membr Biol 2010; 233:135-42. [DOI: 10.1007/s00232-010-9233-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2009] [Accepted: 01/20/2010] [Indexed: 10/19/2022]
|
13
|
Effects of Tryptophan and 5-Hydroxytryptophan on the Hepatic Cell Membrane Rigidity Due to Oxidative Stress. J Membr Biol 2009; 231:93-9. [DOI: 10.1007/s00232-009-9208-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2009] [Accepted: 09/21/2009] [Indexed: 01/08/2023]
|
14
|
Pan L, Fu JH, Xue XD, Xu W, Zhou P, Wei B. Melatonin protects against oxidative damage in a neonatal rat model of bronchopulmonary dysplasia. World J Pediatr 2009; 5:216-21. [PMID: 19693467 DOI: 10.1007/s12519-009-0041-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2008] [Accepted: 12/25/2008] [Indexed: 11/30/2022]
Abstract
BACKGROUND Oxidative stress plays an important role in the pathogenesis of bronchopulmonary dysplasia (BPD). Melatonin (MT) has direct and indirect free radical detoxifying activity. The present study was to investigate whether treatment with MT would attenuate hyperoxia-induced lung injury and the effect of MT on imbalance of oxidants/antioxidants in the lung of neonatal rats. METHODS BPD was induced by exposure to hyperoxia in neonatal rats (n=90). The rats were divided randomly into three groups (n=30 each): air-exposed control group, hyperoxia-exposed group, and hyperoxia-exposed MT-treated group. Lung specimens were obtained respectively on day 3, day 7, and day 14 after exposure (n=10 each). Activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase (CAT), and levels of myeloperoxidase (MPO), nitrite/nitrate, and malondialdehyde (MDA) were assayed. Histopathologic changes were observed in the tissues stained with hematoxylin and eosin and Masson's trichrome stain. RESULTS Increased levels of MPO, nitrite/nitrate, and MDA in the hyperoxia-exposed rats were significantly reduced by MT (P<0.05). Activities of GSH-Px, SOD, and CAT which did not change after exposure to hyperoxia were increased by MT (P<0.05). Furthermore, BPD associated histopathological alterations such as reduced total number of alveoli and interstitial fibrosis were obviously abated in the MT-treated group. CONCLUSIONS MT can reverse oxidants/antioxidants imbalance in damaged lung tissue and thus exert a beneficial effect on hyperoxia-induced lung disease in neonatal rats. With regard to humans, there may be a protective effect of MT on BPD.
Collapse
Affiliation(s)
- Li Pan
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, 110004, China
| | | | | | | | | | | |
Collapse
|
15
|
Lee YD, Kim JY, Lee KH, Kwak YJ, Lee SK, Kim OS, Song DY, Lee JH, Baik TK, Kim BJ, Kim JY, Baik HW. Melatonin attenuates lipopolysaccharide-induced acute lung inflammation in sleep-deprived mice. J Pineal Res 2009; 46:53-7. [PMID: 18673421 DOI: 10.1111/j.1600-079x.2008.00621.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Sleep disorders are great problems in modern society. Even minimal changes of sleep can affect health. Especially, patients with pulmonary diseases complain of sleep problems such as sleep disturbance and insomnia. Recent studies have shown an association between sleep deprivation (SD) and inflammation, however, the underlying mechanisms remain unclear. In the present study, we investigated whether melatonin protects against acute lung inflammation in SD. Male ICR mice were deprived sleep using modified multiplatform water bath for 3 days. Acute lung inflammation was induced by lipopolysaccharide (LPS; 5 mg/kg). Melatonin (5 mg/kg) and LPS was administered in SD mice at day 2. Mice were divided into five groups as control, SD, LPS, LPS + SD, and LPS + SD + melatonin (each group, n = 11). Mice were killed on day 3 after treatment of melatonin and LPS for 24 hr. Lung tissues were collected for histological examination and protein analysis. The malondialdehyde (MDA) level was determined for the effect of oxidative stress. Melatonin restored weight loss in LPS + SD. Histological findings revealed alveolar damages with inflammatory cell infiltration in LPS + SD. Melatonin remarkably attenuated the alveolar damages. In western blot analysis, LPS reduced the levels of Bcl-XL and procaspase-3 in SD mice. After treatment with melatonin, the levels of Bcl-XL and procaspase-3 increased when compared with LPS + SD. LPS treatment showed an increase of TUNEL-positive cells, whereas melatonin prevented the increase of cell death in LPS + SD animals. In lipid peroxidation assay, melatonin significantly reduced the elevated MDA level in LPS + SD. Our results suggest that melatonin attenuates acute lung inflammation during SD via anti-apoptotic and anti-oxidative actions.
Collapse
Affiliation(s)
- Yang-Deok Lee
- Department of Internal Medicine, Eulji University School of Medicine, Daejeon, Republic of Korea
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
D'Agostino DP, Colomb DG, Dean JB. Effects of hyperbaric gases on membrane nanostructure and function in neurons. J Appl Physiol (1985) 2008; 106:996-1003. [PMID: 18818382 DOI: 10.1152/japplphysiol.91070.2008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
This mini-review summarizes current ideas of how hyperbaric gases (>1-10 atmospheres absolute) affect neuronal mechanisms of excitability through molecular interaction with membrane components. The dynamic nature of the lipid bilayer, its resident proteins, and the underlying cytoskeleton make each respective nanostructure a potential target for modulation by hyperbaric gases. Depending on the composition of the gas mixture, the relative concentrations of O(2) and inert gas, and total barometric pressure, the net effect of a particular gas on the cell membrane will be determined by the gas' 1) lipid solubility, 2) ability to oxidize lipids and proteins (O(2)), and 3) capacity, in the compressed state, to generate localized shear and strain forces between various nanostructures. A change in the properties of any one membrane component is anticipated to change conductance of membrane-spanning ion channels and thus neuronal function.
Collapse
Affiliation(s)
- Dominic P D'Agostino
- Department of Molecular Pharmacology and Physiology, Hyperbaric Biomedical Research Laboratory, College of Medicine, University of South Florida, Tampa 33612, USA
| | | | | |
Collapse
|
17
|
Göcgeldi E, Uysal B, Korkmaz A, Ogur R, Reiter RJ, Kurt B, Oter S, Topal T, Hasde M. Establishing the use of melatonin as an adjuvant therapeutic against paraquat-induced lung toxicity in rats. Exp Biol Med (Maywood) 2008; 233:1133-41. [PMID: 18535163 DOI: 10.3181/0802-rm-65] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
It is well known that the intake of paraquat (PQ) causes severe tissue injury leading to numerous fatalities. Considering that the main target for PQ toxicity is the lung and involves the production of reactive oxygen and nitrogen species, transcription factors and inflammatory cytokines, it may be hypothesized that the combination of a potent antiinflammatory and antioxidant agent may counteract more of PQ's effects than an antiinflammatory agent alone. For this purpose, combination of dexamethasone (Dex) and melatonin (Mel) was compared with Dex alone. A total of 40 male Wistar albino rats were divided into four groups as control, PQ, Dex only, and Dex plus Mel. The animals were given intraperitoneally a toxic dose of 19 mg/kg PQ dissolved in 1 ml saline. Control animals were injected with the same amount of saline only. A dose of 1 mg/kg Dex was administered 2 hrs after PQ administration. In the combination treatment group, 20 mg/kg Mel was given with Dex. All drugs were given every 12 hrs for a total of six doses. Five animals in PQ group and three animals in Dex only group died by the end of the study. No deaths occurred in the Dex+Mel group. Dex exerted improvements in several oxidative and antioxidative parameters. However, combination treatment provided beneficial effects against PQ toxicity far greater than Dex alone. This difference was also apparent when tissues were histologically compared. In conclusion, Mel exhibited strong additive beneficial effects with Dex and can be considered as a safe treatment modality against PQ toxicity.
Collapse
Affiliation(s)
- Ercan Göcgeldi
- Department of Public Health, Gülhane Military Medical Academy, Ankara, Turkey
| | | | | | | | | | | | | | | | | |
Collapse
|
18
|
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.
Collapse
Affiliation(s)
- Ahmet Korkmaz
- Department of Physiology, Gülhane Askeri Tip Akademisi, Fizyoloji Anabilim Dali, 06018 Ankara, Turkey
| | | | | | | | | | | | | | | |
Collapse
|
19
|
Ucar M, Korkmaz A, Reiter RJ, Yaren H, Oter S, Kurt B, Topal T. Melatonin alleviates lung damage induced by the chemical warfare agent nitrogen mustard. Toxicol Lett 2007; 173:124-31. [PMID: 17765411 DOI: 10.1016/j.toxlet.2007.07.005] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2007] [Revised: 07/09/2007] [Accepted: 07/09/2007] [Indexed: 11/23/2022]
Abstract
The cytotoxic mechanism of mustards has not been fully elucidated; recently, we reported that reactive oxygen species, nitric oxide [produced by inducible nitric oxide synthase (iNOS)] and peroxynitrite are involved in the pathogenesis and responsible for mustard-induced toxicity. Melatonin, a potent antioxidant molecule, acts as an iNOS inhibitor and a peroxynitrite scavenger. Using the prototypic nitrogen mustard (mechlorethamine/HN2) as a model and based on its known cytotoxic mechanisms, the present study was performed to test melatonin for its capability in protecting the lungs of injured male Wistar rats. Lung mustard toxicity was induced via an intratracheally injection of HN2 (0.5mg/kg) dissolved in saline (100microl). Control animals were injected the same amount of saline only. Melatonin was administered intraperitoneally with two different doses (20mg/kg or 40mg/kg) beginning 1h before HN2 application and continued every 12h for six replications. Forty-eight hours after the last melatonin injection, the animals were sacrificed and their lungs were taken for further assay, i.e., malondialdehyde (MDA) levels, and superoxide dismutase (SOD), glutathione peroxidase (GPx) and iNOS activity. Additionally their urine was collected for nitrite-nitrate (NO(x)) analysis. HN2 injection caused increased iNOS activity and MDA levels in lung tissue and NO(x) values in urine; lung GPx activity was significantly depressed. Melatonin restored all of these oxidative and nitrosative stress markers in a dose-dependent manner. In conclusion, the results of study provide evidence that melatonin may have the ability to reduce mustard-induced toxicity in the lungs.
Collapse
Affiliation(s)
- Muharrem Ucar
- Department of Public Health, Gülhane Military Medical Academy, Ankara, Turkey
| | | | | | | | | | | | | |
Collapse
|