1
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Halliwell B, Watt F, Minqin R. Iron and atherosclerosis: Lessons learned from rabbits relevant to human disease. Free Radic Biol Med 2023; 209:165-170. [PMID: 37852545 DOI: 10.1016/j.freeradbiomed.2023.10.383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 10/02/2023] [Accepted: 10/10/2023] [Indexed: 10/20/2023]
Abstract
The role of iron in promoting atherosclerosis, and hence the cardiovascular, neurodegenerative and other diseases that result from atherosclerosis, has been fiercely controversial. Many studies have been carried out on various rodent models of atherosclerosis, especially on apoE-knockout (apoE-/-) mice, which develop atherosclerosis more readily than normal mice. These apoE-/- mouse studies generally support a role for iron in atherosclerosis development, although there are conflicting results. The purpose of the current article is to describe studies on another animal model that is not genetically manipulated; New Zealand White (NZW) rabbits fed a high-cholesterol diet. This may be a better model than the apoE-/- mice for human atherosclerosis, although it has been given much less attention. Studies on NZW rabbits support the view that iron promotes atherosclerosis, although some uncertainties remain, which need to be resolved by further experimentation.
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Affiliation(s)
- Barry Halliwell
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Neurobiology Research Programme, National University of Singapore, Centre for Life Sciences, #05-01A, 28 Medical Drive, 117456, Singapore.
| | - Frank Watt
- Department of Physics, National University of Singapore, Faculty of Science, 2 Science Drive 3, Blk S12, Level 2, 117551, Singapore.
| | - Ren Minqin
- Department of Physics, National University of Singapore, Faculty of Science, 2 Science Drive 3, Blk S12, Level 2, 117551, Singapore.
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2
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Yang J, Tang Q, Zeng Y. Melatonin: Potential avenue for treating iron overload disorders. Ageing Res Rev 2022; 81:101717. [PMID: 35961513 DOI: 10.1016/j.arr.2022.101717] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 07/10/2022] [Accepted: 08/08/2022] [Indexed: 02/08/2023]
Abstract
Iron overload as a highly risk factor, can be found in almost all human chronic and common diseases. Iron chelators are often used to treat iron overload; however, patient adherence to these chelators is poor due to obvious side effects and other disadvantages. Numerous studies have shown that melatonin has a high iron chelation ability and direct free radical scavenging activity, and can inhibit the lipid peroxidation process caused by iron overload. Therefore, melatonin may become potential complementary therapy for iron overload-related disorders due to its iron chelating and antioxidant activities. Here, the research progress of iron overload is reviewed and the therapeutic potential of melatonin in the treatment of iron overload is analyzed. In addition, studies related to the protective effects of melatonin on oxidative damage induced by iron overload are discussed. This review provides a foundation for preventing and treating iron homeostasis disorders with melatonin.
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Affiliation(s)
- Jiancheng Yang
- Department of Osteoporosis, Honghui Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Qinghua Tang
- Department of Osteoporosis, Honghui Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Yuhong Zeng
- Department of Osteoporosis, Honghui Hospital, Xi'an Jiaotong University, Xi'an, China.
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3
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Camp OG, Bai D, Awonuga A, Goud P, Abu-Soud HM. Hypochlorous acid facilitates inducible nitric oxide synthase subunit dissociation: The link between heme destruction, disturbance of the zinc-tetrathiolate center, and the prevention by melatonin. Nitric Oxide 2022; 124:32-38. [PMID: 35513289 DOI: 10.1016/j.niox.2022.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/20/2022] [Accepted: 04/29/2022] [Indexed: 11/25/2022]
Abstract
Inducible nitric oxide synthase (iNOS) is a zinc-containing hemoprotein composed of two identical subunits, each containing a reductase and an oxygenase domain. The reductase domain contains binding sites for NADPH, FAD, FMN, and tightly bound calmodulin and the oxygenase domain contains binding sites for heme, tetrahydrobiopterin (H4B), and l-arginine. The enzyme converts l-arginine into nitric oxide (NO) and citrulline in the presence of O2. It has previously been demonstrated that myeloperoxidase (MPO), which catalyzes formation of hypochlorous acid (HOCl) from hydrogen peroxide (H2O2) and chloride (Cl-), is enhanced in inflammatory diseases and could be a potent scavenger of NO. Using absorbance spectroscopy and gel filtration chromatography, we investigated the role of increasing concentrations of HOCl in mediating iNOS heme destruction and subsequent subunit dissociation and unfolding. The results showed that dimer iNOS dissociation between 15 and 100 μM HOCl was accompanied by loss of heme content and NO synthesis activity. The dissociated subunits-maintained cytochrome c and ferricyanide reductase activities. There was partial unfolding of the subunits at 300 μM HOCl and above, and the subunit unfolding transition was accompanied by loss of reductase activities. These events can be prevented when the enzyme is preincubated with melatonin prior to HOCl addition. Melatonin supplementation to patients experiencing low NO levels due to inflammatory diseases may be helpful to restore physiological NO functions.
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Affiliation(s)
- Olivia G Camp
- Departments of Obstetrics and Gynecology and Biochemistry and Molecular Biology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI, 48201, USA; Department of Physiology, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - David Bai
- Departments of Obstetrics and Gynecology and Biochemistry and Molecular Biology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Awoniyi Awonuga
- Departments of Obstetrics and Gynecology and Biochemistry and Molecular Biology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Pravin Goud
- Division of Reproductive Endocrinology and Infertility & California IVF Fertility Center, Department of Obstetrics and Gynecology, University of California Davis, Sacramento, CA, 95833, USA; California Northstate University Medical College, Elk Grove, CA, 95757, USA
| | - Husam M Abu-Soud
- Departments of Obstetrics and Gynecology and Biochemistry and Molecular Biology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI, 48201, USA; Department of Physiology, Wayne State University School of Medicine, Detroit, MI, 48201, USA; Department of Microbiology, Immunology and Biochemistry, Wayne State University School of Medicine, Detroit, MI, 48201, USA.
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4
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Camp OG, Bai D, Gonullu DC, Nayak N, Abu-Soud HM. Melatonin interferes with COVID-19 at several distinct ROS-related steps. J Inorg Biochem 2021; 223:111546. [PMID: 34304092 PMCID: PMC8285369 DOI: 10.1016/j.jinorgbio.2021.111546] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 06/30/2021] [Accepted: 07/13/2021] [Indexed: 12/17/2022]
Abstract
Recent studies have shown a correlation between COVID-19, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, and the distinct, exaggerated immune response titled "cytokine storm". This immune response leads to excessive production and accumulation of reactive oxygen species (ROS) that cause clinical signs characteristic of COVID-19 such as decreased oxygen saturation, alteration of hemoglobin properties, decreased nitric oxide (NO) bioavailability, vasoconstriction, elevated cytokines, cardiac and/or renal injury, enhanced D-dimer, leukocytosis, and an increased neutrophil to lymphocyte ratio. Particularly, neutrophil myeloperoxidase (MPO) is thought to be especially abundant and, as a result, contributes substantially to oxidative stress and the pathophysiology of COVID-19. Conversely, melatonin, a potent MPO inhibitor, has been noted for its anti-inflammatory, anti-oxidative, anti-apoptotic, and neuroprotective actions. Melatonin has been proposed as a safe therapeutic agent for COVID-19 recently, having been given with a US Food and Drug Administration emergency authorized cocktail, REGEN-COV2, for management of COVID-19 progression. This review distinctly highlights both how the destructive interactions of HOCl with tetrapyrrole rings may contribute to oxygen deficiency and hypoxia, vitamin B12 deficiency, NO deficiency, increased oxidative stress, and sleep disturbance, as well as how melatonin acts to prevent these events, thereby improving COVID-19 prognosis.
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Affiliation(s)
- Olivia G Camp
- Departments of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA; Department of Physiology, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - David Bai
- Departments of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Damla C Gonullu
- Departments of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Neha Nayak
- Departments of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Husam M Abu-Soud
- Departments of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA; Department of Physiology, Wayne State University School of Medicine, Detroit, MI 48201, USA; Department of Microbiology, Immunology and Biochemistry, Wayne State University School of Medicine, Detroit, MI 48201, USA.
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5
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Goud PT, Bai D, Abu-Soud HM. A Multiple-Hit Hypothesis Involving Reactive Oxygen Species and Myeloperoxidase Explains Clinical Deterioration and Fatality in COVID-19. Int J Biol Sci 2021; 17:62-72. [PMID: 33390833 PMCID: PMC7757048 DOI: 10.7150/ijbs.51811] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 10/07/2020] [Indexed: 02/06/2023] Open
Abstract
Multi-system involvement and rapid clinical deterioration are hallmarks of coronavirus disease 2019 (COVID-19) related mortality. The unique clinical phenomena in severe COVID-19 can be perplexing, and they include disproportionately severe hypoxemia relative to lung alveolar-parenchymal pathology and rapid clinical deterioration, with poor response to O2 supplementation, despite preserved lung mechanics. Factors such as microvascular injury, thromboembolism, pulmonary hypertension, and alteration in hemoglobin structure and function could play important roles. Overwhelming immune response associated with "cytokine storms" could activate reactive oxygen species (ROS), which may result in consumption of nitric oxide (NO), a critical vasodilation regulator. In other inflammatory infections, activated neutrophils are known to release myeloperoxidase (MPO) in a natural immune response, which contributes to production of hypochlorous acid (HOCl). However, during overwhelming inflammation, HOCl competes with O2 at heme binding sites, decreasing O2 saturation. Moreover, HOCl contributes to several oxidative reactions, including hemoglobin-heme iron oxidation, heme destruction, and subsequent release of free iron, which mediates toxic tissue injury through additional generation of ROS and NO consumption. Connecting these reactions in a multi-hit model can explain generalized tissue damage, vasoconstriction, severe hypoxia, and precipitous clinical deterioration in critically ill COVID-19 patients. Understanding these mechanisms is critical to develop therapeutic strategies to combat COVID-19.
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Affiliation(s)
- Pravin T Goud
- Division of Reproductive Endocrinology and Infertility & California IVF Fertility Center, Department of Obstetrics and Gynecology, University of California Davis, Sacramento, CA, 95833, USA
- California Northstate University Medical College, Elk Grove, CA, 95757, USA
| | - David Bai
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Husam M Abu-Soud
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI, 48201, USA
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI, 48201, USA
- Department of Microbiology, Immunology and Biochemistry, Wayne State University School of Medicine, Detroit, MI, 48201, USA
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6
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Jeelani R, Chatzicharalampous C, Kohan-Ghadr HR, Bai D, Morris RT, Sliskovic I, Awonuga A, Abu-Soud HM. Hypochlorous acid reversibly inhibits caspase-3: a potential regulator of apoptosis. Free Radic Res 2020; 54:43-56. [DOI: 10.1080/10715762.2019.1694675] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Roohi Jeelani
- Department of Obstetrics and Gynecology, the CS Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI, USA
| | - Charalampos Chatzicharalampous
- Department of Obstetrics and Gynecology, the CS Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI, USA
| | - Hamid-Reza Kohan-Ghadr
- Department of Obstetrics, Gynecology, and Reproductive Biology, Michigan State University College of Human Medicine, Grand Rapids, MI, USA
| | - David Bai
- Department of Obstetrics and Gynecology, the CS Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI, USA
| | - Robert T. Morris
- Department of Obstetrics and Gynecology, the CS Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI, USA
- Karmanos Cancer Institute, Detroit, MI, USA
| | - Inga Sliskovic
- Department of Obstetrics and Gynecology, the CS Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI, USA
| | - Awoniyi Awonuga
- Department of Obstetrics and Gynecology, the CS Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI, USA
| | - Husam M. Abu-Soud
- Department of Obstetrics and Gynecology, the CS Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI, USA
- Department of Microbiology, Immunology and Biochemistry and Department of Physiology, Wayne State University School of Medicine, Detroit, MI, USA
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7
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Pramanik SK, Pal U, Choudhary P, Singh H, Reiter RJ, Ethirajan A, Swarnakar S, Das A. Stimuli-Responsive Nanocapsules for the Spatiotemporal Release of Melatonin: Protection against Gastric Inflammation. ACS APPLIED BIO MATERIALS 2019; 2:5218-5226. [DOI: 10.1021/acsabm.9b00236] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Sumit Kumar Pramanik
- CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar, Gujarat 364 002, India
| | - Uttam Pal
- Chemical Sciences Division, Saha Institute of Nuclear Physics, Kolkata, West Bengal 700 064, India
| | - Preety Choudhary
- Cancer Biology & Inflammatory Disorder Division, CSIR-Indian Institute of Chemical Biology, Kolkata, West Bengal 700 032, India
| | - Harwinder Singh
- CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar, Gujarat 364 002, India
| | - Russel J. Reiter
- Department of Cellular and Structural Biology, University of Texas Health Science Center, San Antonio, Texas 78229, United States
| | - Anitha Ethirajan
- Institute for Materials Research (IMO), Hasselt University, Wetenschapspark 1, Diepenbeek 3590, Belgium
| | - Snehasikta Swarnakar
- Cancer Biology & Inflammatory Disorder Division, CSIR-Indian Institute of Chemical Biology, Kolkata, West Bengal 700 032, India
| | - Amitava Das
- CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar, Gujarat 364 002, India
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8
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Jeelani R, Maitra D, Chatzicharalampous C, Najeemuddin S, Morris RT, Abu-Soud HM. Melatonin prevents hypochlorous acid-mediated cyanocobalamin destruction and cyanogen chloride generation. J Pineal Res 2018; 64:10.1111/jpi.12463. [PMID: 29247550 PMCID: PMC5843513 DOI: 10.1111/jpi.12463] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 12/05/2017] [Indexed: 12/15/2022]
Abstract
Hypochlorous acid (HOCl) is a potent cytotoxic oxidant generated by the enzyme myeloperoxidase (MPO) in the presence of hydrogen peroxide (H2 O2 ) and chloride (Cl- ). Elevated levels of HOCl play an important role in various pathological conditions through oxidative modification of several biomolecules. Recently, we have highlighted the ability of HOCl to mediate the destruction of the metal-ion derivatives of tetrapyrrole macrocyclic rings such as hemoproteins and vitamin B12 (VB12 ) derivatives. Destruction of cyanocobalamin, a common pharmacological form of VB12 mediated by HOCl, results in the generation of toxic molecular products such as chlorinated derivatives, corrin ring cleavage products, the toxic blood agents cyanide (CN- ) and cyanogen chloride (CNCl), and redox-active free cobalt. Here, we show that melatonin prevents HOCl-mediated cyanocobalamin destruction, using a combination of UV-Vis spectrophotometry, high-performance liquid chromatography analysis, and colorimetric CNCl assay. Identification of several melatonin oxidation products suggests that the protective role of melatonin against HOCl-mediated cyanocobalamin destruction and subsequent CNCl generation is at the expense of melatonin oxidation. Collectively, this work highlights that, in addition to acting as an antioxidant and as a MPO inhibitor, melatonin can also prevent VB12 deficiency in inflammatory conditions such as cardiovascular and neurodegenerative diseases, among many others.
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Affiliation(s)
- Roohi Jeelani
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, C. S. Mott Center for Human Growth and Development, 275 E. Hancock, Detroit, MI, 48201 USA
| | - Dhiman Maitra
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, C. S. Mott Center for Human Growth and Development, 275 E. Hancock, Detroit, MI, 48201 USA
| | - Charalampos Chatzicharalampous
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, C. S. Mott Center for Human Growth and Development, 275 E. Hancock, Detroit, MI, 48201 USA
| | - Syed Najeemuddin
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, C. S. Mott Center for Human Growth and Development, 275 E. Hancock, Detroit, MI, 48201 USA
| | - Robert T. Morris
- Division of Gynecologic Oncology, Department of Oncology, Wayne State University and Karmanos Cancer Institute, Detroit, MI, 48201 USA
| | - Husam M. Abu-Soud
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, C. S. Mott Center for Human Growth and Development, 275 E. Hancock, Detroit, MI, 48201 USA
- Department of Microbiology, Immunology and Biochemistry, Wayne State University School of Medicine, Detroit, MI, 48201 USA
- Address correspondence to: Husam Abu-Soud, Department of Obstetrics and Gynecology, C. S. Mott Center for Growth and Development, Wayne State University, 275 E. Hancock Detroit, MI 48201. Tel: 313/577-6178; Fax: 313/577-8554;
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Bertozo LDC, Zeraik ML, Ximenes VF. Dansylglycine, a fluorescent probe for specific determination of halogenating activity of myeloperoxidase and eosinophil peroxidase. Anal Biochem 2017; 532:29-37. [DOI: 10.1016/j.ab.2017.05.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 05/26/2017] [Accepted: 05/31/2017] [Indexed: 12/25/2022]
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Pazar A, Kolgazi M, Memisoglu A, Bahadir E, Sirvanci S, Yaman A, Yeğen BÇ, Ozek E. The neuroprotective and anti-apoptotic effects of melatonin on hemolytic hyperbilirubinemia-induced oxidative brain damage. J Pineal Res 2016; 60:74-83. [PMID: 26511903 DOI: 10.1111/jpi.12292] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 10/26/2015] [Indexed: 12/16/2022]
Abstract
Melatonin exerts protection in several inflammatory and neurodegenerative disorders. To investigate the neuroprotective effects of melatonin in an experimental hemolysis-induced hyperbilirubinemia, newborn Sprague-Dawley rats (25-40 g, n = 72) were injected with phenylhydrazine hydrochloride (PHZ; 75 mg/kg) and the injections were repeated at the 24th hour. Rats were treated with saline or melatonin (10 mg/kg) 30 min before the first and second PHZ injections and 24 h after the 2nd PHZ injections. Control rats (n = 24) were injected with saline, but not PHZ. At sixth hours after the last injections of saline or melatonin, all rats were decapitated. Tumor necrosis factor (TNF)-α, IL-1β, IL-10 and brain-derived neurotrophic factor (BDNF) and S100B levels in the plasma were measured. Brain tissue malondialdehyde (MDA), glutathione (GSH) levels and myeloperoxidase (MPO) activities were measured, and brain tissues were evaluated for apoptosis by TUNEL method. In the saline-treated PHZ group, hemoglobin, hematocrit levels were reduced, and total/direct bilirubin levels were elevated when compared to control group. Increased plasma TNF-α, IL-1β levels, along with decreased BDNF, S100B and IL-10 values were observed in the saline-treated PHZ group, while these changes were all reversed in the melatonin-treated group. Increased MDA levels and MPO activities in the brain tissues of saline-treated hyperbilirubinemic rats, concomitant with depleted brain GSH stores, were also reversed in the melatonin-treated hyperbilirubinemic rats. Increased TUNEL(+) cells in the hippocampus of saline-treated PHZ group were reduced by melatonin treatment. Melatonin exerts neuroprotective and anti-apoptotic effects on the oxidative neuronal damage of the newborn rats with hemolysis and hyperbilirubinemia.
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Affiliation(s)
- Asilay Pazar
- Department of Paediatrics, Marmara University School of Medicine, Istanbul, Turkey
| | - Meltem Kolgazi
- Department of Physiology, Acibadem University School of Medicine, Istanbul, Turkey
| | - Aslı Memisoglu
- Division of Neonatology, Department of Paediatrics, Marmara University School of Medicine, Istanbul, Turkey
| | - Elif Bahadir
- Department of Physiology, Marmara University School of Medicine, Istanbul, Turkey
| | - Serap Sirvanci
- Department of Histology and Embryology, Marmara University School of Medicine, Istanbul, Turkey
| | - Akan Yaman
- Division of Neonatology, Department of Paediatrics, Marmara University School of Medicine, Istanbul, Turkey
| | - Berrak Ç Yeğen
- Department of Physiology, Marmara University School of Medicine, Istanbul, Turkey
| | - Eren Ozek
- Division of Neonatology, Department of Paediatrics, Marmara University School of Medicine, Istanbul, Turkey
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11
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Lu N, Li J, Ren X, Tian R, Peng YY. Nitrite attenuated hypochlorous acid-mediated heme degradation in hemoglobin. Chem Biol Interact 2015; 238:25-32. [DOI: 10.1016/j.cbi.2015.05.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 04/30/2015] [Accepted: 05/29/2015] [Indexed: 01/08/2023]
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12
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Khan SN, Shaeib F, Najafi T, Kavdia M, Gonik B, Saed GM, Goud PT, Abu-Soud HM. Diffused Intra-Oocyte Hydrogen Peroxide Activates Myeloperoxidase and Deteriorates Oocyte Quality. PLoS One 2015; 10:e0132388. [PMID: 26197395 PMCID: PMC4511228 DOI: 10.1371/journal.pone.0132388] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 06/12/2015] [Indexed: 11/30/2022] Open
Abstract
Hydrogen peroxide (H2O2) is a relatively long-lived signaling molecule that plays an essential role in oocyte maturation, implantation, as well as early embryonic development. Exposure to relatively high levels of H2O2 functions efficiently to accelerate oocyte aging and deteriorate oocyte quality. However, little precise information exists regarding intra-oocyte H2O2 concentrations, and its diffusion to the oocyte milieu. In this work, we utilized an L-shaped amperometric integrated H2O2-selective probe to directly and quantitatively measure the real-time intra-oocyte H2O2 concentration. This investigation provides an exact measurement of H2O2 in situ by reducing the possible loss of H2O2 caused by diffusion or reactivity with other biological systems. This experiment suggests that the intra-oocyte H2O2 levels of oocytes obtained from young animals are reasonably high and remained constant during the procedure measurements. However, the intra-oocyte H2O2 concentration dropped significantly (40-50% reduction) in response to catalase pre-incubation, suggesting that the measurements are truly H2O2 based. To further confirm the extracellular diffusion of H2O2, oocytes were incubated with myeloperoxidase (MPO), and the diffused H2O2 triggered MPO chlorinating activity. Our results show that the generated hypochlorous acid (HOCl) facilitated the deterioration in oocyte quality, a process that could be prevented by pre-incubating the oocytes with melatonin, which was experimentally proven to be oxidized utilizing HPLC methods. This study is the first to demonstrate direct quantitative measurement of intracellular H2O2, and its extracellular diffusion and activation of MPO as well as its impact on oocyte quality. These results may help in designing more accurate treatment plans in assisted reproduction under inflammatory conditions.
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Affiliation(s)
- Sana N. Khan
- Department of Obstetrics and Gynecology, The C, S, Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit Michigan, United States of America
| | - Faten Shaeib
- Department of Obstetrics and Gynecology, The C, S, Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit Michigan, United States of America
| | - Tohid Najafi
- Department of Obstetrics and Gynecology, The C, S, Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit Michigan, United States of America
- Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Mahendra Kavdia
- Department of Biomedical Engineering, Wayne State University, Detroit, Michigan, United States of America
| | - Bernard Gonik
- Department of Obstetrics and Gynecology, The C, S, Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit Michigan, United States of America
| | - Ghassan M. Saed
- Department of Obstetrics and Gynecology, The C, S, Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit Michigan, United States of America
| | - Pravin T. Goud
- Department of Obstetrics and gynecology, Division of Reproductive Endocrinology and Infertility, University of California Davis, Sacramento, California, United States of America, and California IVF Fertility Center, Davis and Sacramento, California, United States of America
| | - Husam M. Abu-Soud
- Department of Obstetrics and Gynecology, The C, S, Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit Michigan, United States of America
- Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
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13
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Shaeib F, Khan SN, Ali I, Najafi T, Maitra D, Abdulhamid I, Saed GM, Pennathur S, Abu-Soud HM. Melatonin prevents myeloperoxidase heme destruction and the generation of free iron mediated by self-generated hypochlorous acid. PLoS One 2015; 10:e0120737. [PMID: 25835505 PMCID: PMC4383586 DOI: 10.1371/journal.pone.0120737] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 02/06/2015] [Indexed: 12/26/2022] Open
Abstract
Myeloperoxidase (MPO) generated hypochlorous acid (HOCl) formed during catalysis is able to destroy the MPO heme moiety through a feedback mechanism, resulting in the accumulation of free iron. Here we show that the presence of melatonin (MLT) can prevent HOCl-mediated MPO heme destruction using a combination of UV-visible photometry, hydrogen peroxide (H2O2)-specific electrode, and ferrozine assay techniques. High performance liquid chromatography (HPLC) analysis showed that MPO heme protection was at the expense of MLT oxidation. The full protection of the MPO heme requires the presence of a 1:2 MLT to H2O2 ratio. Melatonin prevents HOCl-mediated MPO heme destruction through multiple pathways. These include competition with chloride, the natural co-substrate; switching the MPO activity from a two electron oxidation to a one electron pathway causing the buildup of the inactive Compound II, and its subsequent decay to MPO-Fe(III) instead of generating HOCl; binding to MPO above the heme iron, thereby preventing the access of H2O2 to the catalytic site of the enzyme; and direct scavenging of HOCl. Collectively, in addition to acting as an antioxidant and MPO inhibitor, MLT can exert its protective effect by preventing the release of free iron mediated by self-generated HOCl. Our work may establish a direct mechanistic link by which MLT exerts its antioxidant protective effect in chronic inflammatory diseases with MPO elevation.
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Affiliation(s)
- Faten Shaeib
- Departments of Obstetrics and Gynecology, the C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Sana N. Khan
- Departments of Obstetrics and Gynecology, the C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Iyad Ali
- Departments of Obstetrics and Gynecology, the C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, Michigan, United States of America
- Department of Biochemistry and Genetics, Faculty of Medicine, An-Najah National University, Nablus, Palestine
| | - Tohid Najafi
- Departments of Obstetrics and Gynecology, the C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, Michigan, United States of America
- Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Dhiman Maitra
- Departments of Obstetrics and Gynecology, the C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | | | - Ghassan M. Saed
- Departments of Obstetrics and Gynecology, the C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Subramaniam Pennathur
- Division of Nephrology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Husam M. Abu-Soud
- Departments of Obstetrics and Gynecology, the C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, Michigan, United States of America
- Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
- * E-mail:
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14
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Abu-Soud HM, Maitra D, Shaeib F, Khan SN, Byun J, Abdulhamid I, Yang Z, Saed GM, Diamond MP, Andreana PR, Pennathur S. Disruption of heme-peptide covalent cross-linking in mammalian peroxidases by hypochlorous acid. J Inorg Biochem 2014; 140:245-54. [PMID: 25193127 PMCID: PMC4449957 DOI: 10.1016/j.jinorgbio.2014.06.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 06/25/2014] [Accepted: 06/27/2014] [Indexed: 12/14/2022]
Abstract
Myeloperoxidase (MPO), lactoperoxidase (LPO) and eosinophil peroxidase (EPO) play a central role in oxidative damage in inflammatory disorders by utilizing hydrogen peroxide and halides/pseudo halides to generate the corresponding hypohalous acid. The catalytic sites of these enzymes contain a covalently modified heme group, which is tethered to the polypeptide chain at two ester linkages via the methyl group (MPO, EPO and LPO) and one sulfonium bond via the vinyl group (MPO only). Covalent cross-linking of the catalytic site heme to the polypeptide chain in peroxidases is thought to play a protective role, since it renders the heme moiety less susceptible to the oxidants generated by these enzymes. Mass-spectrometric analysis revealed the following possible pathways by which hypochlorous acid (HOCl) disrupts the heme-protein cross-linking: (1) the methyl-ester bond is cleaved to form an alcohol; (2) the alcohol group undergoes an oxygen elimination reaction via the formation of an aldehyde intermediate or undergoes a demethylation reaction to lose the terminal CH2 group; and (3) the oxidative cleavage of the vinyl-sulfonium linkage. Once the heme moiety is released it undergoes cleavage at the carbon-methyne bridge either along the δ-β or a α-γ axis to form different pyrrole derivatives. These results indicate that covalent cross-linking is not enough to protect the enzymes from HOCl mediated heme destruction and free iron release. Thus, the interactions of mammalian peroxidases with HOCl modulates their activity and sets a stage for initiation of the Fenton reaction, further perpetuating oxidative damage at sites of inflammation.
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Affiliation(s)
- Husam M Abu-Soud
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA; Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine, Detroit, MI 48201, USA.
| | - Dhiman Maitra
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Faten Shaeib
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Sana N Khan
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Jaeman Byun
- Division of Nephrology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Ibrahim Abdulhamid
- Department of Pediatrics, Children's Hospital of Michigan, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Zhe Yang
- Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Ghassan M Saed
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Michael P Diamond
- Department of Obstetrics and Gynecology, Georgia Regents University, Augusta, GA 30912, USA
| | - Peter R Andreana
- The University of Toledo, Department of Chemistry and School of Green Chemistry and Engineering, 2801 W. Bancroft St., Toledo, OH 43606, USA
| | - Subramaniam Pennathur
- Division of Nephrology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109, USA.
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Sadowska-Bartosz I, Ott C, Grune T, Bartosz G. Posttranslational protein modifications by reactive nitrogen and chlorine species and strategies for their prevention and elimination. Free Radic Res 2014; 48:1267-84. [PMID: 25119970 DOI: 10.3109/10715762.2014.953494] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Proteins are subject to various posttranslational modifications, some of them being undesired from the point of view of metabolic efficiency. Prevention of such modifications is expected to provide new means of therapy of diseases and decelerate the process of aging. In this review, modifications of proteins by reactive nitrogen species and reactive halogen species, is briefly presented and means of prevention of these modifications and their sequelae are discussed, including the denitrase activity and inhibitors of myeloperoxidase.
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Affiliation(s)
- I Sadowska-Bartosz
- Department of Biochemistry and Cell Biology, University of Rzeszów , Rzeszów , Poland
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16
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Chou TY, Reiter RJ, Chen KH, Leu FJ, Wang D, Yeh DY. Pulmonary function changes in rats with taurocholate-induced pancreatitis are attenuated by pretreatment with melatonin. J Pineal Res 2014; 56:196-203. [PMID: 24330221 DOI: 10.1111/jpi.12112] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Accepted: 12/09/2013] [Indexed: 12/31/2022]
Abstract
Melatonin is a free radical scavenger and broad-spectrum antioxidant with immunomodulatory effects. We studied the effects of melatonin on changes in lung function, oxidative/nitrosative stress, and inflammatory cell sequestration in an acute pancreatitis (AP)-associated lung inflammation model. Acute pancreatitis was induced by injection of 5% sodium taurocholate into the pancreatic duct of rats. Animals were randomized into control, AP, and a melatonin pretreatment (10 mg/kg)/AP group. Functional residual capacity (FRC), lung compliance (Cchord), expiratory flow rate at 50% (FEF50), airway resistance index (RI), and peak expiratory flow rate (PEF) were evaluated. White blood cell count (WBC) and hydrogen peroxide, lung lavage fluid WBC, methylguanidine, protein, lactic dehydrogenase (LDH), nitric oxide (NO), and leukotriene B4 (LTB4) levels were determined. Lung wet-to-dry weight ratio, peroxynitrite, and inducible nitric oxide synthase (NOS) mRNA and protein were measured. AP induction resulted in reductions in FRC, Cchord, FEF50, and PEF, and increase in RI and lung wet-to-dry weight ratio. Blood and lung lavage fluid WBC, lavage fluid LDH, protein, and blood hydrogen peroxide also increased. Levels of hydroxyl radicals, nitric oxide, and LTB4 in lung lavage fluid, inducible NOS mRNA, protein expression, and peroxynitrite in lung tissue also were significantly elevated. Pretreatment with melatonin attenuated obstructive and restrictive ventilatory insufficiency induced by AP. Blood and lavage WBC, lavage LDH and protein, lung edema, oxidative/nitrosative stress, and lipoxygenase pathway derivatives were also significantly attenuated by melatonin. We conclude that melatonin decreases AP-induced obstructive and restrictive lung function changes via its antioxidant and anti-inflammatory properties.
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Affiliation(s)
- Ting-Ywan Chou
- Medical Imaging Department, Cardinal Tien Hospital, New Taipei City, Taiwan; School of Medicine, College of Medicine, Fu-Jen Catholic University, New Taipei City, Taiwan
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Maitra D, Shaeib F, Abdulhamid I, Abdulridha RM, Saed GM, Diamond MP, Pennathur S, Abu-Soud HM. Myeloperoxidase acts as a source of free iron during steady-state catalysis by a feedback inhibitory pathway. Free Radic Biol Med 2013; 63:90-8. [PMID: 23624305 PMCID: PMC3863623 DOI: 10.1016/j.freeradbiomed.2013.04.009] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 04/01/2013] [Accepted: 04/08/2013] [Indexed: 02/07/2023]
Abstract
Myeloperoxidase (MPO) is a heme-containing enzyme that generates hypochlorous acid (HOCl) from chloride (Cl(-)) and hydrogen peroxide (H₂O₂). It is implicated in the pathology of several chronic inflammatory conditions such as cardiovascular and pulmonary diseases and cancer. Recently we have shown that HOCl can destroy the heme prosthetic group of hemoproteins. Here, we investigated whether the HOCl formed during steady-state catalysis is able to destroy the MPO heme moiety and thereby function as a major source of free iron. UV-visible spectra and H₂O₂-specific electrode measurements recorded during steady-state HOCl synthesis by MPO showed that the degree of MPO heme destruction increased after multiple additions of H₂O₂ (10 µM), precluding the enzyme from functioning at maximum activity (80-90% inhibition). MPO heme destruction occurred only in the presence of Cl(-). Stopped-flow measurements revealed that the HOCl-mediated MPO heme destruction was complex and occurred through transient ferric species whose formation and decay kinetics indicated it participates in heme destruction along with subsequent free iron release. MPO heme depletion was confirmed by the buildup of free iron utilizing the ferrozine assay. Hypochlorous acid, once generated, first equilibrates in the solution as a whole before binding to the heme iron and initiating heme destruction. Eliminating HOCl from the MPO milieu by scavenging HOCl, destabilizing the MPO-Compound I-Cl complex that could be formed during catalysis, and/or inhibiting MPO catalytic activity partially or completely protects MPO from HOCl insults. Collectively, this study elucidates the bidirectional relationship between MPO and HOCl, which highlights the potential role of MPO as a source of free iron.
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Affiliation(s)
- Dhiman Maitra
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Detroit, MI 48201, USA
| | - Faten Shaeib
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Detroit, MI 48201, USA
| | | | - Rasha M. Abdulridha
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Detroit, MI 48201, USA
| | - Ghassan M. Saed
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Detroit, MI 48201, USA
| | - Michael P. Diamond
- Department of Obstetrics and Gynecology, Georgia Regents University, Augusta, GA 30912, USA
| | - Subramaniam Pennathur
- Division of Nephrology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Husam M. Abu-Soud
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Detroit, MI 48201, USA
- Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine, Detroit, MI 48201, USA
- Corresponding author. Fax: 313 577 8554. (H. M. Abu-Soud)
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Banerjee J, Shaeib F, Maitra D, Saed GM, Dai J, Diamond MP, Abu-Soud HM. Peroxynitrite affects the cumulus cell defense of metaphase II mouse oocytes leading to disruption of the spindle structure in vitro. Fertil Steril 2013; 100:578-84.e1. [PMID: 23721714 DOI: 10.1016/j.fertnstert.2013.04.030] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2013] [Revised: 04/02/2013] [Accepted: 04/16/2013] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To demonstrate the effects of peroxynitrite (ONOO(-)) on metaphase II mouse oocyte spindle structure and chromosomal alignment in presence and absence of cumulus cells. DESIGN Experimental study. SETTING University-based research laboratory. ANIMAL(S) Metaphase II mouse oocytes (n = 440). INTERVENTION(S) Metaphase II mouse oocytes, with and without cumulus cells, were exposed to ONOO(-), nitrite/nitrate, the final product of ONOO(-), and nontreated controls for 15 minutes. Oocytes were fixed and subjected to indirect immunofluorescence for detecting changes in the spindle and chromosomal alignment. Viability staining in exposed oocytes with and without cumulus cells was performed using the trypan blue dye exclusion method and compared with controls. MAIN OUTCOME MEASURE(S) Scoring the alterations in spindle and chromosomal alignment using immunofluorescent and confocal microscopy based on a previously validated system. RESULT(S) Most oocytes had poor scores for the spindle and chromosomal alignment with exposure to ONOO(-) in a dose-dependent manner compared with controls. Trypan blue staining revealed that most of the cumulus cells failed to survive treatment with ONOO(-) compared with controls. CONCLUSION(S) ONOO(-) affects the viability of cumulus cells and the oocyte spindle structure in a dose-dependent manner. Collectively, these effects compromise oocyte quality, which may lead to female infertility.
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Affiliation(s)
- Jashoman Banerjee
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Detroit, Michigan 48201, USA
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Shaeib F, Banerjee J, Maitra D, Diamond MP, Abu-Soud HM. Impact of hydrogen peroxide-driven Fenton reaction on mouse oocyte quality. Free Radic Biol Med 2013; 58:154-9. [PMID: 23261938 PMCID: PMC4482232 DOI: 10.1016/j.freeradbiomed.2012.12.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 12/07/2012] [Accepted: 12/10/2012] [Indexed: 12/12/2022]
Abstract
Here we show that hydroxyl radical ((•)OH) generated through the Fenton reaction alters metaphase-II mouse oocyte microtubules (MT) and chromosomal alignment (CH). Metaphase-II mouse oocytes, obtained commercially, were grouped as follows: control, hydrogen peroxide (H2O2), Fe(II), and combined (Fe(II) +H2O2) treatments. After 7-10 min of incubation at 37 °C, MT and CH were evaluated on fixed and stained oocytes and scored by two blinded observers. Pearson χ(2) test and Fisher exact test were used to compare outcomes between controls and treated groups and also among the treated groups. Our results showed that poor scores for MT and CH increased significantly in oocytes treated with a combination of H2O2 and Fe(II) (p<0.001); oocytes treated with H2O2 alone or Fe(II) alone showed no or few changes compared to control. Comparison of oocyte groups that received increasing concentrations of H2O2 and a fixed amount of Fe(II) showed that 70-80% demonstrated poor scores in both MT and CH when pretreated with 5 μM H2O2, and this increased up to 90-100% when treated with 10-20 μM H2O2. Hydroxyl radical generated by H2O2-driven Fenton reaction deteriorates the metaphase-II mouse oocyte spindle and CH alignment, which is thought to be a potential cause of poor oocyte quality. Thus, free iron and/or ROS scavengers could attenuate the (•)OH-mediated spindle and chromosomal damage, thereby serving as a possible approach for further examination as a therapeutic option in inflammatory states.
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Affiliation(s)
| | | | | | | | - Husam M. Abu-Soud
- Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine, Detroit, Michigan 48201
- Address correspondence to: Husam M Abu-Soud, Ph.D Wayne State University School of Medicine, Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, 275 E. Hancock Detroit, MI 48201, Tel. 313 577-6178, Fax. 313 577-8554,
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Adamczyk-Sowa M, Sowa P, Zwirska-Korczala K, Pierzchala K, Bartosz G, Sadowska-Bartosz I. Role of melatonin receptor MT2and quinone reductase II in the regulation of the redox status of 3T3-L1 preadipocytes in vitro. Cell Biol Int 2013; 37:835-42. [DOI: 10.1002/cbin.10105] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Accepted: 03/21/2013] [Indexed: 12/11/2022]
Affiliation(s)
- Monika Adamczyk-Sowa
- Department of Neurology in Zabrze; Medical University of Silesia; ul. 3-go Maja 13-15; Zabrze; 41-800; Poland
| | - Pawel Sowa
- ENT Department in Zabrze; Medical University of Silesia; Silesia; Poland
| | | | - Krystyna Pierzchala
- Department of Neurology in Zabrze; Medical University of Silesia; ul. 3-go Maja 13-15; Zabrze; 41-800; Poland
| | | | - Izabela Sadowska-Bartosz
- Department of Biochemistry and Cell Biology; University of Rzeszow; ul. Zelwerowicza 4; Rzeszow; 35-601; Poland
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