151
|
Babu D, Morgan AG, Reiz B, Whittal RM, Almas S, Lacy P, Siraki AG. Eosinophil peroxidase oxidizes isoniazid to form the active metabolite against M. tuberculosis, isoniazid-NAD . Chem Biol Interact 2019; 305:48-53. [PMID: 30922765 DOI: 10.1016/j.cbi.2019.03.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 03/14/2019] [Accepted: 03/21/2019] [Indexed: 11/24/2022]
Abstract
The formation of isonicotinyl-nicotinamide adenine dinucleotide (INH-NAD+) by the mycobacterial catalase-peroxidase enzyme, KatG, was known to be the major component of the mode of action of isoniazid (INH), an anti-tuberculosis drug. However, there are other enzymes that may catalyze this reaction. We have previously reported that neutrophil myeloperoxidase (MPO) is capable of metabolizing INH through the formation of INH-NAD+ adduct, which could be attributed to being a possible mode of action of INH. However, eosinophilic infiltration of the lungs is more pronounced and characteristic of granulomas in Mycobacterium tuberculosis-infected patients. Thus, the aim of the present study is to investigate the role of eosinophil peroxidase (EPO), a key eosinophil enzyme, during INH metabolism and the formation of its active metabolite, INH-NAD+ using purified EPO and eosinophils isolated from asthmatic donors. UV-Vis spectroscopy revealed INH oxidation by EPO led to a new product (λmax = 326 nm) in the presence of NAD+. This adduct was confirmed to be INH-NAD+ using LC-MS analysis where the intact adduct was detected (m/z = 769). Furthermore, EPO catalyzed the oxidation of INH and formed several free radical intermediates as assessed by electron paramagnetic resonance (EPR) spin-trapping; a carbon-centred radical, which is considered to be the reactive metabolite that binds with NAD+, was found when superoxide dismutase was included in the reaction. Our findings suggest that eosinophilic EPO may also play a role in the pharmacological activity of INH through the formation of INH-NAD+ adduct, and supports further evidence that human cells and enzymes are capable of producing the active metabolite involved in tuberculosis treatment.
Collapse
Affiliation(s)
- Dinesh Babu
- Faculty of Pharmacy and Pharmaceutical Sciences, Katz Group Centre for Pharmacy & Health Research, University of Alberta, Edmonton, AB, Canada
| | - Andrew G Morgan
- Faculty of Pharmacy and Pharmaceutical Sciences, Katz Group Centre for Pharmacy & Health Research, University of Alberta, Edmonton, AB, Canada
| | - Béla Reiz
- Department of Chemistry, Faculty of Sciences, University of Alberta, Edmonton, AB, Canada
| | - Randy M Whittal
- Department of Chemistry, Faculty of Sciences, University of Alberta, Edmonton, AB, Canada
| | - Sarah Almas
- Pulmonary Research Group, Department of Medicine, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Paige Lacy
- Pulmonary Research Group, Department of Medicine, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Arno G Siraki
- Faculty of Pharmacy and Pharmaceutical Sciences, Katz Group Centre for Pharmacy & Health Research, University of Alberta, Edmonton, AB, Canada.
| |
Collapse
|
152
|
Ksendzova GA, Ostrovskaya NI, Semenkova GN, Sorokin VL, Shishkanova PA, Shadyro OI. Synthesis of 3,5-Di-tert-butyl-1,2-dihydroxybenzene Derivatives and Their Effect on Free-Radical Oxidation of Hexane and Oxygen Activation Ability of Neutrophils. RUSS J GEN CHEM+ 2019. [DOI: 10.1134/s1070363219030046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
153
|
Jiang P, Jmaiff Blackstock LK, Wawryk NJ, Huang G, Li XF. Analytical characterization of N-halogenated peptides produced by disinfection: Formation, degradation, and occurrence in water. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2018.08.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
154
|
Benchoam D, Cuevasanta E, Möller MN, Alvarez B. Hydrogen Sulfide and Persulfides Oxidation by Biologically Relevant Oxidizing Species. Antioxidants (Basel) 2019; 8:antiox8020048. [PMID: 30813248 PMCID: PMC6406583 DOI: 10.3390/antiox8020048] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 02/15/2019] [Accepted: 02/19/2019] [Indexed: 12/12/2022] Open
Abstract
Hydrogen sulfide (H2S/HS–) can be formed in mammalian tissues and exert physiological effects. It can react with metal centers and oxidized thiol products such as disulfides (RSSR) and sulfenic acids (RSOH). Reactions with oxidized thiol products form persulfides (RSSH/RSS–). Persulfides have been proposed to transduce the signaling effects of H2S through the modification of critical cysteines. They are more nucleophilic and acidic than thiols and, contrary to thiols, also possess electrophilic character. In this review, we summarize the biochemistry of hydrogen sulfide and persulfides, focusing on redox aspects. We describe biologically relevant one- and two-electron oxidants and their reactions with H2S and persulfides, as well as the fates of the oxidation products. The biological implications are discussed.
Collapse
Affiliation(s)
- Dayana Benchoam
- Laboratorio de Enzimología, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Montevideo 11400, Uruguay.
- Center for Free Radical and Biomedical Research, Universidad de la República, Montevideo 11800, Uruguay.
| | - Ernesto Cuevasanta
- Laboratorio de Enzimología, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Montevideo 11400, Uruguay.
- Center for Free Radical and Biomedical Research, Universidad de la República, Montevideo 11800, Uruguay.
- Unidad de Bioquímica Analítica, Centro de Investigaciones Nucleares, Facultad de Ciencias, Universidad de la República, Montevideo 11400, Uruguay.
| | - Matías N Möller
- Center for Free Radical and Biomedical Research, Universidad de la República, Montevideo 11800, Uruguay.
- Laboratorio de Fisicoquímica Biológica, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Montevideo 11400, Uruguay.
| | - Beatriz Alvarez
- Laboratorio de Enzimología, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Montevideo 11400, Uruguay.
- Center for Free Radical and Biomedical Research, Universidad de la República, Montevideo 11800, Uruguay.
| |
Collapse
|
155
|
Ndrepepa G. Myeloperoxidase - A bridge linking inflammation and oxidative stress with cardiovascular disease. Clin Chim Acta 2019; 493:36-51. [PMID: 30797769 DOI: 10.1016/j.cca.2019.02.022] [Citation(s) in RCA: 231] [Impact Index Per Article: 46.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 02/20/2019] [Accepted: 02/20/2019] [Indexed: 12/17/2022]
Abstract
Myeloperoxidase (MPO) is a member of the superfamily of heme peroxidases that is mainly expressed in neutrophils and monocytes. MPO-derived reactive species play a key role in neutrophil antimicrobial activity and human defense against various pathogens primarily by participating in phagocytosis. Elevated MPO levels in circulation are associated with inflammation and increased oxidative stress. Multiple lines of evidence suggest an association between MPO and cardiovascular disease (CVD) including coronary artery disease, congestive heart failure, arterial hypertension, pulmonary arterial hypertension, peripheral arterial disease, myocardial ischemia/reperfusion-related injury, stroke, cardiac arrhythmia and venous thrombosis. Elevated MPO levels are associated with a poor prognosis including increased risk for overall and CVD-related mortality. Elevated MPO may signify an increased risk for CVD for at least 2 reasons. First, low-grade inflammation and increased oxidative stress coexist with many metabolic abnormalities and comorbidities and consequently an elevated MPO level may represent an increased cardiometabolic risk in general. Second, MPO produces a large number of highly reactive species which can attack, destroy or modify the function of every known cellular component. The most common MPO actions relevant to CVD are generation of dysfunctional lipoproteins with an increased atherogenicity potential, reduced NO availability, endothelial dysfunction, impaired vasoreactivity and atherosclerotic plaque instability. These actions strongly suggest that MPO is directly involved in the pathophysiology of CVD. In this regard MPO may be seen as a mediator or an instrument through which inflammation promotes CVD at molecular and cellular level. Clinical value of MPO therapeutic inhibition remains to be tested.
Collapse
Affiliation(s)
- Gjin Ndrepepa
- Department of Adult Cardiology, Deutsches Herzzentrum München, Technische Universität, Lazarettstrasse 36, 80636 Munich, Germany.
| |
Collapse
|
156
|
Bekhit M, Gorski W. Electrochemical Assays and Immunoassays of the Myeloperoxidase/SCN -/H 2O 2 System. Anal Chem 2019; 91:3163-3169. [PMID: 30689356 DOI: 10.1021/acs.analchem.8b05855] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Strategies to detect and characterize myeloperoxidase (MPO) are needed, given that this "split personality" enzyme kills harmful microorganisms but also damages a host tissue. Here, we describe electrochemical approaches to measure MPO by using the pseudohalogenation (MPO/SCN-/H2O2) and catalase-like (MPO/H2O2) cycles. Their kinetics were determined by monitoring the consumption of H2O2 with a nitrogen-doped carbon nanotubes (N-CNT) electrode, which could detect 0.50 μM H2O2 at -0.20 V. The unique design of internally calibrated electrochemical continuous enzyme assay (ICECEA) and electrode stability allowed use of one N-CNT electrode for over half a year to reliably determine MPO. The kinetic measurements showed that (a) SCN- did not affect the affinity of MPO for H2O2, (b) catalase-like cycle was slower, and (c) MPO retained enzymatically active conformation after complexation with its antibody Ab both in a solution and on the surface of an antibody dipstick (d/Ab). The homogeneous assays could detect 5.2 μg L-1 MPO (35 pM) via a faster cycle. The heterogeneous immunoassays with the capture of MPO on d/Ab could detect 60 μg L-1, which was suitable for the accurate detection of MPO in human saliva (101% recovery). Replacing a detection antibody of ELISA with ICECEA as a signal transducer for immunoassays offers a rapid method for the selective determination of enzymes; for example, time of MPO quantification was cut from 3-4 h (sandwich ELISA) to ∼20 min (ICECEA-dipstick).
Collapse
Affiliation(s)
- Michael Bekhit
- Department of Chemistry , University of Texas at San Antonio , One UTSA Circle , San Antonio , Texas 78249 , United States
| | - Waldemar Gorski
- Department of Chemistry , University of Texas at San Antonio , One UTSA Circle , San Antonio , Texas 78249 , United States
| |
Collapse
|
157
|
Antioxidants as Renoprotective Agents for Ischemia during Partial Nephrectomy. BIOMED RESEARCH INTERNATIONAL 2019; 2019:8575398. [PMID: 30882000 PMCID: PMC6383545 DOI: 10.1155/2019/8575398] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 10/29/2018] [Accepted: 01/22/2019] [Indexed: 12/28/2022]
Abstract
Small renal masses have been diagnosed increasingly in recent decades, allowing surgical treatment by partial nephrectomy. This treatment option is associated with better renal function preservation, in comparison with radical nephrectomy. However, for obtaining a bloodless field during surgery, occlusion of renal artery and veins is often required, which results in transitory ischemia. The renal ischemia-reperfusion injury is associated with increased reactive oxygen species production leading to renal tissue damage. Thus, the use of antioxidants has been advocated in the partial nephrectomy perioperative period. Several antioxidants were investigated in regard to renal ischemia-reperfusion injury. The present manuscript aims to present the literature on the most commonly studied antioxidants used during partial nephrectomy. The results of experimental and clinical studies using antioxidants during partial nephrectomy are reported. Further, alimentary sources of some antioxidants are presented, stimulating future studies focusing on perioperative antioxidant-rich diets.
Collapse
|
158
|
Colon S, Luan H, Liu Y, Meyer C, Gewin L, Bhave G. Peroxidasin and eosinophil peroxidase, but not myeloperoxidase, contribute to renal fibrosis in the murine unilateral ureteral obstruction model. Am J Physiol Renal Physiol 2019; 316:F360-F371. [PMID: 30565999 PMCID: PMC6397377 DOI: 10.1152/ajprenal.00291.2018] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 12/05/2018] [Accepted: 12/15/2018] [Indexed: 01/21/2023] Open
Abstract
Renal fibrosis is the pathological hallmark of chronic kidney disease (CKD) and manifests as glomerulosclerosis and tubulointerstitial fibrosis. Reactive oxygen species contribute significantly to renal inflammation and fibrosis, but most research has focused on superoxide and hydrogen peroxide (H2O2). The animal heme peroxidases myeloperoxidase (MPO), eosinophil peroxidase (EPX), and peroxidasin (PXDN) uniquely metabolize H2O2 into highly reactive and destructive hypohalous acids, such as hypobromous and hypochlorous acid. However, the role of these peroxidases and their downstream hypohalous acids in the pathogenesis of renal fibrosis is unclear. Our study defines the contribution of MPO, EPX, and PXDN to renal inflammation and tubulointerstitial fibrosis in the murine unilateral ureteral obstruction (UUO) model. Using a nonspecific inhibitor of animal heme peroxidases and peroxidase-specific knockout mice, we find that loss of EPX or PXDN, but not MPO, reduces renal fibrosis. Furthermore, we demonstrate that eosinophils, the source of EPX, accumulate in the renal interstitium after UUO. These findings point to EPX and PXDN as potential therapeutic targets for renal fibrosis and CKD and suggest that eosinophils modulate the response to renal injury.
Collapse
Affiliation(s)
- Selene Colon
- Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center , Nashville, Tennessee
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center , Nashville, Tennessee
| | - Haiyan Luan
- Department of Basic Medical Sciences, Jiamusi University, Jiamusi, China
| | - Yan Liu
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University School of Medicine , Nashville, Tennessee
- Department of Veterans Affairs, Tennessee Valley Health Care System, Nashville, Tennessee
| | - Cameron Meyer
- Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center , Nashville, Tennessee
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center , Nashville, Tennessee
| | - Leslie Gewin
- Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center , Nashville, Tennessee
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center , Nashville, Tennessee
- Department of Cell and Developmental Biology, Vanderbilt University , Nashville, Tennessee
| | - Gautam Bhave
- Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center , Nashville, Tennessee
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center , Nashville, Tennessee
- Department of Cell and Developmental Biology, Vanderbilt University , Nashville, Tennessee
| |
Collapse
|
159
|
Carroll L, Karton A, Radom L, Davies MJ, Pattison DI. Carnosine and Carcinine Derivatives Rapidly React with Hypochlorous Acid to Form Chloramines and Dichloramines. Chem Res Toxicol 2019; 32:513-525. [DOI: 10.1021/acs.chemrestox.8b00363] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Luke Carroll
- The Heart Research Institute, Newtown, New South Wales 2042, Australia
- Sydney Medical School, University of Sydney, Sydney, New South Wales 2006, Australia
- Panum Institute, University of Copenhagen, Copenhagen 2200, Denmark
| | - Amir Karton
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia 6009, Australia
| | - Leo Radom
- School of Chemistry, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Michael J. Davies
- The Heart Research Institute, Newtown, New South Wales 2042, Australia
- Sydney Medical School, University of Sydney, Sydney, New South Wales 2006, Australia
- Panum Institute, University of Copenhagen, Copenhagen 2200, Denmark
| | - David I. Pattison
- The Heart Research Institute, Newtown, New South Wales 2042, Australia
- Sydney Medical School, University of Sydney, Sydney, New South Wales 2006, Australia
| |
Collapse
|
160
|
Davies MJ, Schiesser CH. 1,4-Anhydro-4-seleno-d-talitol (SeTal): a remarkable selenium-containing therapeutic molecule. NEW J CHEM 2019. [DOI: 10.1039/c9nj02185j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1,4-Anhydro-4-seleno-d-talitol is an exceptional selenium-containing small molecule with significant therapeutic potential; its beneficial actions firmly establish a new therapeutic paradigm in which selenium plays a central role.
Collapse
Affiliation(s)
- Michael J. Davies
- Department of Biomedical Sciences, University of Copenhagen
- Denmark
- Seleno Therapeutics Pty. Ltd
- Australia
| | | |
Collapse
|
161
|
Rayner BS, Zhang Y, Brown BE, Reyes L, Cogger VC, Hawkins CL. Role of hypochlorous acid (HOCl) and other inflammatory mediators in the induction of macrophage extracellular trap formation. Free Radic Biol Med 2018; 129:25-34. [PMID: 30189264 DOI: 10.1016/j.freeradbiomed.2018.09.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 08/28/2018] [Accepted: 09/01/2018] [Indexed: 12/23/2022]
Abstract
The infiltration of activated leukocytes, including macrophages, at sites of inflammation and the formation and presence of hypochlorous acid (HOCl) are interlinked hallmarks of many debilitating disease processes, including atherosclerosis, arthritis, neurological and renal disease, diabetes and obesity. The production of extracellular traps by activated leukocytes in response to a range of inflammatory stimuli is increasingly recognised as an important process within a range of disease settings. We show that exposure of human monocyte-derived macrophages to pathophysiological levels of HOCl results in the dose-dependent extrusion of DNA and histones into the cellular supernatant, consistent with extracellular trap formation. Concurrent with, but independent of these findings, macrophage exposure to HOCl also resulted in an immediate and sustained cytosolic accumulation of Ca2+, culminating in the increased production of cytokines and chemokines. Polarisation of the macrophages prior to HOCl exposure revealed a greater propensity for inflammatory M1 macrophages to produce extracellular traps, whereas alternatively-activated M2 macrophages were less susceptible to HOCl insult. M1 macrophages also produced extracellular traps on exposure to phorbol myristate acetate (PMA), interleukin-8 (IL-8) and tumour necrosis factor α (TNFα). Taken together, these data indicate a potential role for macrophages in mediating extracellular trap formation, which may be relevant in pathological conditions characterised by chronic inflammation or excessive HOCl formation.
Collapse
Affiliation(s)
- Benjamin S Rayner
- Heart Research Institute, 7 Eliza Street, Newtown, NSW 2042, Australia; Sydney Medical School, University of Sydney, NSW 2006, Australia
| | - Yunjia Zhang
- Heart Research Institute, 7 Eliza Street, Newtown, NSW 2042, Australia; Sydney Medical School, University of Sydney, NSW 2006, Australia
| | - Bronwyn E Brown
- Heart Research Institute, 7 Eliza Street, Newtown, NSW 2042, Australia; Sydney Medical School, University of Sydney, NSW 2006, Australia
| | - Leila Reyes
- Heart Research Institute, 7 Eliza Street, Newtown, NSW 2042, Australia; Sydney Medical School, University of Sydney, NSW 2006, Australia
| | - Victoria C Cogger
- Sydney Medical School, University of Sydney, NSW 2006, Australia; ANZAC Research Institute, Concord Repatriation General Hospital, Concord, NSW 2139, Australia
| | - Clare L Hawkins
- Heart Research Institute, 7 Eliza Street, Newtown, NSW 2042, Australia; Sydney Medical School, University of Sydney, NSW 2006, Australia; Department of Biomedical Sciences, University of Copenhagen, Panum Institute, Blegdamsvej 3, Copenhagen N DK-2200, Denmark.
| |
Collapse
|
162
|
Pussinen PJ, Malle E, Sattler W. Importance of maintaining good oral health in cardiometabolic disorders. Int J Cardiol 2018; 271:291-292. [PMID: 30001946 DOI: 10.1016/j.ijcard.2018.07.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 07/02/2018] [Indexed: 10/28/2022]
Affiliation(s)
- Pirkko J Pussinen
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki University Hospital, Helsinki, Finland.
| | - Ernst Malle
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Wolfgang Sattler
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| |
Collapse
|
163
|
Galijasevic S. The development of myeloperoxidase inhibitors. Bioorg Med Chem Lett 2018; 29:1-7. [PMID: 30466896 DOI: 10.1016/j.bmcl.2018.11.031] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Revised: 11/13/2018] [Accepted: 11/14/2018] [Indexed: 10/27/2022]
Abstract
Myeloperoxidase (MPO), an abundant hemoprotein present in neutrophils and monocytes, plays a significant role in immune surveillance and host defense mechanisms. However, increased MPO activity has been linked to a number of pathologies with compelling evidence in initiation and progression of inflammatory events. As a result, search for active compounds that can efficiently inhibit MPO activity and subsequently decrease inflammatory events has been focus of the current research. This perspective provides an overview of the development of MPO inhibitors, their mechanism of action and the review of molecules that were in clinical trials as promising MPO inhibitors.
Collapse
Affiliation(s)
- Semira Galijasevic
- University Sarajevo School of Science and Technology, Sarajevo Medical School, Bosnia and Herzegovina.
| |
Collapse
|
164
|
Chlorination and oxidation of the extracellular matrix protein laminin and basement membrane extracts by hypochlorous acid and myeloperoxidase. Redox Biol 2018; 20:496-513. [PMID: 30476874 PMCID: PMC6260226 DOI: 10.1016/j.redox.2018.10.022] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 10/29/2018] [Accepted: 10/30/2018] [Indexed: 12/13/2022] Open
Abstract
Basement membranes are specialized extracellular matrices that underlie arterial wall endothelial cells, with laminin being a key structural and biologically-active component. Hypochlorous acid (HOCl), a potent oxidizing and chlorinating agent, is formed in vivo at sites of inflammation via the enzymatic action of myeloperoxidase (MPO), released by activated leukocytes. Considerable data supports a role for MPO-derived oxidants in cardiovascular disease and particularly atherosclerosis. These effects may be mediated via extracellular matrix damage to which MPO binds. Herein we detect and quantify sites of oxidation and chlorination on isolated laminin-111, and laminin in basement membrane extracts (BME), by use of mass spectrometry. Increased modification was detected with increasing oxidant exposure. Mass mapping indicated selectivity in the sites and extent of damage; Met residues were most heavily modified. Fewer modifications were detected with BME, possibly due to the shielding effects. HOCl oxidised 30 (of 56 total) Met and 7 (of 24) Trp residues, and chlorinated 33 (of 99) Tyr residues; 3 Tyr were dichlorinated. An additional 8 Met and 10 Trp oxidations, 14 chlorinations, and 18 dichlorinations were detected with the MPO/H2O2/Cl- system when compared to reagent HOCl. Interestingly, chlorination was detected at Tyr2415 in the integrin-binding region; this may decrease cellular adhesion. Co-localization of MPO-damaged epitopes and laminin was detected in human atherosclerotic lesions. These data indicate that laminin is extensively modified by MPO-derived oxidants, with structural and functional changes. These modifications, and compromised cell-matrix interactions, may promote endothelial cell dysfunction, weaken the structure of atherosclerotic lesions, and enhance lesion rupture.
Collapse
|
165
|
Hanmer KL, Mavri-Damelin D. Peroxidasin is a novel target of the redox-sensitive transcription factor Nrf2. Gene 2018; 674:104-114. [PMID: 29953917 DOI: 10.1016/j.gene.2018.06.076] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 06/22/2018] [Accepted: 06/24/2018] [Indexed: 12/30/2022]
Abstract
Peroxidasin (PXDN) facilitates peroxidative reactions via utilisation of hydrogen peroxide (H2O2) and has been shown to crosslink collagen IV through sulfilimine bond formation in the presence of hypohalous acids. Aberrant PXDN expression has been associated with kidney fibrosis, cancer, congenital eye defects and various cardiovascular disorders. Since PXDN expression is modified by H2O2, we hypothesized that a major antioxidant response transcription factor, nuclear factor erythroid 2-related factor 2 (Nrf2), may regulate PXDN expression. PXDN expression in response to H2O2 and the Nrf2-specific inducers, tert-butylhydroquinone (tBHQ) and sulforaphane (SFN), was determined by western blotting and immunofluorescence microscopy, in HeLa and HEK293 cells. Chromatin immunoprecipitation and luciferase reporter assays were used to investigate the regulation of PXDN by Nrf2. We observed elevated Nrf2 nuclear translocation and increased PXDN protein expression in response to H2O2, tBHQ and SFN, in both cell lines. We found that Nrf2 binds to and increases luciferase reporter gene expression from the PXDN promoter via a putative Nrf2-binding site. In summary, we show that PXDN is a novel target of the redox sensitive transcription factor Nrf2. This finding further highlights the role of PXDN in redox-related processes and compliments the currently understood pathophysiological functions of PXDN.
Collapse
Affiliation(s)
- Kerry L Hanmer
- The School of Molecular and Cell Biology, University of the Witwatersrand, Johannesburg, Private Bag X3, WITS 2050, South Africa
| | - Demetra Mavri-Damelin
- The School of Molecular and Cell Biology, University of the Witwatersrand, Johannesburg, Private Bag X3, WITS 2050, South Africa.
| |
Collapse
|
166
|
Dereven’kov IA, Shpagilev NI, Makarov SV. Mechanism of the Reaction between Cobalamin(II) and Periodate. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2018. [DOI: 10.1134/s0036024418110080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
167
|
Sheikh IA, Jiffri EH, Ashraf GM, Kamal MA. Structural insights into the camel milk lactoperoxidase: Homology modeling and molecular dynamics simulation studies. J Mol Graph Model 2018; 86:43-51. [PMID: 30326373 DOI: 10.1016/j.jmgm.2018.10.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 09/13/2018] [Accepted: 10/09/2018] [Indexed: 12/16/2022]
Abstract
Lactoperoxodase (LPO) is a heme peroxidase enzyme present in mammalian milk. It is an antimicrobial protein with wide range of industrial applications. Although the three dimensional structure of LPO from various mammalian species has been reported, but its structure from camel source is still unknown. So far, the crystallization attempts have not been successful in determining camel LPO (cLPO) structure. Herein, we developed the three dimensional structure of cLPO by homology modeling approach using prime module available in Schrodinger suite. The developed model in complex with ligand hypothiocyanate (OSCN-) was further validated by Ramachandran plot followed by molecular dynamics (MD) simulation studies using Desmond module of Schrodinger. cLPO model exhibited overall structural similarity with template crystal structure, however, it displayed different interaction pattern of amino acid residues with ligand OSCN- in comparison to template crystal structure. Moreover, the ligand binding site environment in cLPO is more polar, less hydrophobic, and harbours more number of charged residues than template crystal structure. The substrate binding pocket environment of cLPO shows a considerable difference from template crystal structure. This subsequently resulted in dissimilar behaviour of ligand during the course of MD simulation studies.
Collapse
Affiliation(s)
- Ishfaq A Sheikh
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia.
| | - Essam H Jiffri
- Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ghulam Md Ashraf
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohammad A Kamal
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| |
Collapse
|
168
|
Vlasova II. Peroxidase Activity of Human Hemoproteins: Keeping the Fire under Control. Molecules 2018; 23:E2561. [PMID: 30297621 PMCID: PMC6222727 DOI: 10.3390/molecules23102561] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 09/28/2018] [Accepted: 10/01/2018] [Indexed: 12/21/2022] Open
Abstract
The heme in the active center of peroxidases reacts with hydrogen peroxide to form highly reactive intermediates, which then oxidize simple substances called peroxidase substrates. Human peroxidases can be divided into two groups: (1) True peroxidases are enzymes whose main function is to generate free radicals in the peroxidase cycle and (pseudo)hypohalous acids in the halogenation cycle. The major true peroxidases are myeloperoxidase, eosinophil peroxidase and lactoperoxidase. (2) Pseudo-peroxidases perform various important functions in the body, but under the influence of external conditions they can display peroxidase-like activity. As oxidative intermediates, these peroxidases produce not only active heme compounds, but also protein-based tyrosyl radicals. Hemoglobin, myoglobin, cytochrome c/cardiolipin complexes and cytoglobin are considered as pseudo-peroxidases. Рeroxidases play an important role in innate immunity and in a number of physiologically important processes like apoptosis and cell signaling. Unfavorable excessive peroxidase activity is implicated in oxidative damage of cells and tissues, thereby initiating the variety of human diseases. Hence, regulation of peroxidase activity is of considerable importance. Since peroxidases differ in structure, properties and location, the mechanisms controlling peroxidase activity and the biological effects of peroxidase products are specific for each hemoprotein. This review summarizes the knowledge about the properties, activities, regulations and biological effects of true and pseudo-peroxidases in order to better understand the mechanisms underlying beneficial and adverse effects of this class of enzymes.
Collapse
Affiliation(s)
- Irina I Vlasova
- Federal Research and Clinical Center of Physical-Chemical Medicine, Department of Biophysics, Malaya Pirogovskaya, 1a, Moscow 119435, Russia.
- Institute for Regenerative Medicine, Laboratory of Navigational Redox Lipidomics, Sechenov University, 8-2 Trubetskaya St., Moscow 119991, Russia.
| |
Collapse
|
169
|
Nybo T, Cai H, Chuang CY, Gamon LF, Rogowska-Wrzesinska A, Davies MJ. Chlorination and oxidation of human plasma fibronectin by myeloperoxidase-derived oxidants, and its consequences for smooth muscle cell function. Redox Biol 2018; 19:388-400. [PMID: 30237127 PMCID: PMC6142189 DOI: 10.1016/j.redox.2018.09.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 08/28/2018] [Accepted: 09/03/2018] [Indexed: 12/11/2022] Open
Abstract
Fibronectin (FN) occurs as both a soluble form, in plasma and at sites of tissue injury, and a cellular form in tissue extracellular matrices (ECM). FN is critical to wound repair, ECM structure and assembly, cell adhesion and proliferation. FN is reported to play a critical role in the development, progression and stability of cardiovascular atherosclerotic lesions, with high FN levels associated with a thick fibrotic cap, stable disease and a low risk of rupture. Evidence has been presented for FN modification by inflammatory oxidants, and particularly myeloperoxidase (MPO)-derived species including hypochlorous acid (HOCl). The targets and consequences of FN modification are poorly understood. Here we show, using a newly-developed MS protocol, that HOCl and an enzymatic MPO system, generate site-specific dose-dependent Tyr chlorination and dichlorination (up to 16 of 100 residues modified), and oxidation of Trp (7 of 39 residues), Met (3 of 26) and His (1 of 55) within selected FN domains, and particularly the heparin- and cell-binding regions. These alterations increase FN binding to heparin-containing columns. Studies using primary human coronary artery smooth muscle cells (HCASMC) show that exposure to HOCl-modified FN, results in decreased adherence, increased proliferation and altered expression of genes involved in ECM synthesis and remodelling. These findings indicate that the presence of modified fibronectin may play a major role in the formation, development and stabilisation of fibrous caps in atherosclerotic lesions and may play a key role in the switching of quiescent contractile smooth muscle cells to a migratory, synthetic and proliferative phenotype.
Collapse
Affiliation(s)
- Tina Nybo
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark
| | - Huan Cai
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark
| | - Christine Y Chuang
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark
| | - Luke F Gamon
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark
| | - Adelina Rogowska-Wrzesinska
- Department of Biochemistry and Molecular Biology and VILLUM Center for Bioanalytical Sciences, University of Southern Denmark, Odense, Denmark
| | - Michael J Davies
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark.
| |
Collapse
|
170
|
Nyssen P, Mouithys-Mickalad A, Minguet G, Sauvage E, Wouters J, Franck T, Hoebeke M. Morphine, a potential inhibitor of myeloperoxidase activity. Biochim Biophys Acta Gen Subj 2018; 1862:2236-2244. [DOI: 10.1016/j.bbagen.2018.07.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 07/05/2018] [Accepted: 07/09/2018] [Indexed: 12/22/2022]
|
171
|
Kim TI, Hwang B, Lee B, Bae J, Kim Y. Selective Monitoring and Imaging of Eosinophil Peroxidase Activity with a J-Aggregating Probe. J Am Chem Soc 2018; 140:11771-11776. [PMID: 30156836 DOI: 10.1021/jacs.8b07073] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The specific detection of eosinophil peroxidase (EPO) activity requires the difficult distinction between hypobromous acid generated by EPO and hypochlorous acid generated by other haloperoxidases. Here we report a fluorogenic probe that is halogenated with high kinetic selectivity (≥1200:1) for HOBr over HOCl. Heavy-atom effects do not quench the dibrominated product because of its self-assembly into emissive J-aggregates that provide a turn-on signal. Applications of this fluorogen to EPO activity assays, dipstick sensors, fluorescence imaging of EPO activity, assays of oxidative stress in cancer cells, and immune response detection in live mice are reported.
Collapse
Affiliation(s)
- Tae-Il Kim
- Department of Chemistry and Research Institute of Basic Sciences , Kyung Hee University , 26 Kyungheedae-ro , Dongdaemun-gu, Seoul 02447 , Korea
| | - Byunghee Hwang
- Department of Chemistry and Research Institute of Basic Sciences , Kyung Hee University , 26 Kyungheedae-ro , Dongdaemun-gu, Seoul 02447 , Korea
| | - Boeun Lee
- Department of Life Science , Chung-Ang University , 84 Heukseok-ro , Dongjak-gu, Seoul 06974 , Korea
| | - Jeehyeon Bae
- School of Pharmacy , Chung-Ang University , 84 Heukseok-ro , Dongjak-gu, Seoul 06974 , Korea
| | - Youngmi Kim
- Department of Chemistry and Research Institute of Basic Sciences , Kyung Hee University , 26 Kyungheedae-ro , Dongdaemun-gu, Seoul 02447 , Korea
| |
Collapse
|
172
|
Hägglund P, Mariotti M, Davies MJ. Identification and characterization of protein cross-links induced by oxidative reactions. Expert Rev Proteomics 2018; 15:665-681. [DOI: 10.1080/14789450.2018.1509710] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Per Hägglund
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark
| | - Michele Mariotti
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Michael J. Davies
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark
| |
Collapse
|
173
|
Abstract
Hydrogen peroxide (H2O2) is generated in numerous biological processes. It transmits cellular signals, contributes to oxidative folding of exported proteins, and, in excess, can be damaging to cells and tissues. Although a strong oxidant, high activation energy barriers make it unreactive with most biological molecules. Its main reactions are with transition metal centers, selenoproteins and selected thiol proteins, with glutathione peroxidases (GPxs) and peroxiredoxins (Prxs) being major targets. It reacts slowly with most thiol proteins, and how they become oxidized during redox signal transmission is not well understood. Recent Advances: Kinetic analysis indicates that Prxs and GPxs are overwhelmingly favored as targets for H2O2 in cells. Studies with localized probes indicate that H2O2 can be produced in cellular microdomains and be consumed by highly reactive targets before it can diffuse to other parts of the cell. Inactivation of these targets alone will not confine it to its site of production. Kinetic data indicate that oxidation of regulatory thiol proteins by H2O2 requires a facilitated mechanism such as directed transfer from source to target or a relay mediated through a highly reactive sensor. Critical Issues and Future Directions: Absolute rates of H2O2 production and steady-state concentrations in cells still need to be characterized. More information on cellular sites of production and action is required, and specific mechanisms of oxidation of regulatory proteins during redox signaling require further characterization. Antioxid. Redox Signal. 29, 541-551.
Collapse
Affiliation(s)
- Christine C Winterbourn
- Department of Pathology, Centre for Free Radical Research, University of Otago Christchurch , Christchurch, New Zealand
| |
Collapse
|
174
|
Kazumura K, Takeuchi K, Hara A, Miwa T, Hattori M, Wu Y, Morishita N, Tsuchiya H, Osawa T. Rapid on-site dual optical system to measure specific reactive oxygen species (O2-• and OCl-) in a tiny droplet of whole blood. PLoS One 2018; 13:e0200573. [PMID: 30067774 PMCID: PMC6070198 DOI: 10.1371/journal.pone.0200573] [Citation(s) in RCA: 7] [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: 05/08/2018] [Accepted: 06/28/2018] [Indexed: 01/15/2023] Open
Abstract
Oxidative stress has been implicated in various disorders and controlling it would be important for healthy life. We have developed a new optical system for easily and accurately measuring oxidative stress in whole blood. It is optimized for simultaneously detecting reactive oxygen species (ROS) and highly reactive ROS (hROS), elicited mostly by white blood cells in a few microliters of blood. Results obtained by using this system show at least four important findings. 1) chemiluminescence of MCLA was confirmed to be attributable to O2-•. 2) PMA-stimulated cells released O2-• longer and more slowly than fMLP-stimulated ones. 3) fluorescence produced by APF oxidation was confirmed to be attributable to hROS, mostly OCl-, produced by myeloperoxidase. 4) the generation of OCl- was found to be a slower process than the O2-• generation. We also conducted pilot studies of oxidative stress in healthy volunteers.
Collapse
Grants
- Funding: This work was supported by the Councilfor Science, Technology and Innovation (CSTI),Cross-ministerial Strategic Innovation Promotion Program (SIP) and`Technologies for creating next-generation agriculture, forestry and fisheries'(funding agency: Bio-oriented Technology Research Advancement Institution, NARO). The funder had no role in study design, data collection and analysis, decision to publish, or preparation ofthe manuscript.KK, KT, AH, TM, MH, NM, and HT are employed by Hamamatsu Photonics K.K. The funder provided support in the form of salaries for authors [KK, KT, AH, TM, MH, NM, and HT],but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.YW is employed by Healthcare Systems Co. Ltd. The funder provided support in the form of salaries for authors [YW],but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.The specific roles of these authors are articulated in the `author contributions' section.
Collapse
Affiliation(s)
- Kimiko Kazumura
- Central Research Laboratory, Hamamatsu Photonics K.K., Shizuoka, Japan
| | - Kozo Takeuchi
- Central Research Laboratory, Hamamatsu Photonics K.K., Shizuoka, Japan
| | - Akiko Hara
- Central Research Laboratory, Hamamatsu Photonics K.K., Shizuoka, Japan
| | - Toshiyuki Miwa
- Central Research Laboratory, Hamamatsu Photonics K.K., Shizuoka, Japan
| | - Masaki Hattori
- Global Strategic Challenge Center, Hamamatsu Photonics K.K., Shizuoka, Japan
| | - Yuqiu Wu
- Department of Research and Development, Healthcare Systems Co. Ltd., Aichi, Japan
| | | | - Hiroshi Tsuchiya
- Central Research Laboratory, Hamamatsu Photonics K.K., Shizuoka, Japan
| | - Toshihiko Osawa
- Department of Health and Nutrition, Faculty of Psychological and Physical Science, Aichi Gakuin University, Aichi, Japan
| |
Collapse
|
175
|
Yu M, Bouley BS, Xie D, Enriquez JS, Que EL. 19F PARASHIFT Probes for Magnetic Resonance Detection of H2O2 and Peroxidase Activity. J Am Chem Soc 2018; 140:10546-10552. [DOI: 10.1021/jacs.8b05685] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Meng Yu
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - Bailey S. Bouley
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - Da Xie
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - José S. Enriquez
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - Emily L. Que
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712-1224, United States
| |
Collapse
|
176
|
Khalil A, Medfai H, Poelvoorde P, Kazan MF, Delporte C, Van Antwerpen P, El-Makhour Y, Biston P, Delrée P, Badran B, Vanhamme L, Boudjeltia KZ. Myeloperoxidase promotes tube formation, triggers ERK1/2 and Akt pathways and is expressed endogenously in endothelial cells. Arch Biochem Biophys 2018; 654:55-69. [PMID: 30016634 DOI: 10.1016/j.abb.2018.07.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 06/15/2018] [Accepted: 07/12/2018] [Indexed: 01/15/2023]
Abstract
Myeloperoxidase is a member of the mammalian peroxidase family, mainly expressed in the myeloblastic cell lineage. It is considered a major bactericidal agent as it is released in the phagosome where it catalyzes the formation of reactive oxygen species. It is also released in the extracellular spaces including blood where it is absorbed on (lipo)proteins and endothelial cell surface, interfering with endothelial function. We performed RNA sequencing on MPO-treated endothelial cells, analyzed their transcriptome and validated the profile of gene expression by individual qRT-PCR. Some of the induced genes could be grouped in several functional networks, including tubulogenesis, angiogenesis, and blood vessel morphogenesis and development as well as signal transduction pathways associated to these mechanisms. MPO treatment mimicked the effects of VEGF on several signal transduction pathways, such as Akt, ERK or FAK involved in angiogenesis. Accordingly MPO, independently of its enzymatic activity, stimulated tube formation by endothelial cells. RNA interference also pointed at a role of endogenous MPO in tubulogenesis and endothelium wound repair in vitro. These data suggest that MPO, whether from endogenous or exogenous sources, could play a role in angiogenesis and vascular repair in vivo.
Collapse
Affiliation(s)
- Alia Khalil
- Laboratory of Experimental Medicine (ULB 222 Unit), CHU de Charleroi, A. Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium; Laboratory of Cancer Biology and Molecular Immunology, Lebanese University, Faculty of Sciences, Hadath-Beirut, Lebanon
| | - Hayfa Medfai
- Laboratory of Experimental Medicine (ULB 222 Unit), CHU de Charleroi, A. Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Philippe Poelvoorde
- Laboratory of Molecular Biology of Inflammation, IBMM, Faculty of Sciences, Université Libre de Bruxelles, Gosselies, Belgium
| | - Mohammad Fayyad Kazan
- Laboratory of Molecular Biology of Inflammation, IBMM, Faculty of Sciences, Université Libre de Bruxelles, Gosselies, Belgium
| | - Cedric Delporte
- Laboratory of Pharmaceutical Chemistry and Analytical Platform of the Faculty of Pharmacy, Faculty of Pharmacy, Université Libre de Bruxelles, Brussels, Belgium
| | - Pierre Van Antwerpen
- Laboratory of Pharmaceutical Chemistry and Analytical Platform of the Faculty of Pharmacy, Faculty of Pharmacy, Université Libre de Bruxelles, Brussels, Belgium
| | - Yolla El-Makhour
- Laboratory of Cancer Biology and Molecular Immunology, Lebanese University, Faculty of Sciences, Hadath-Beirut, Lebanon
| | - Patrick Biston
- Department of Intensive Care Unit, CHU de Charleroi, Charleroi, Belgium
| | - Paul Delrée
- IPG, Avenue Georges Lemaître 25, 6041, Gosselies, Belgium
| | - Bassam Badran
- Laboratory of Cancer Biology and Molecular Immunology, Lebanese University, Faculty of Sciences, Hadath-Beirut, Lebanon
| | - Luc Vanhamme
- Laboratory of Experimental Medicine (ULB 222 Unit), CHU de Charleroi, A. Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium; Laboratory of Molecular Biology of Inflammation, IBMM, Faculty of Sciences, Université Libre de Bruxelles, Gosselies, Belgium.
| | - Karim Zouaoui Boudjeltia
- Laboratory of Experimental Medicine (ULB 222 Unit), CHU de Charleroi, A. Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| |
Collapse
|
177
|
Interference of carbidopa and other catechols with reactions catalyzed by peroxidases. Biochim Biophys Acta Gen Subj 2018; 1862:1626-1634. [DOI: 10.1016/j.bbagen.2018.04.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 04/06/2018] [Accepted: 04/06/2018] [Indexed: 12/27/2022]
|
178
|
Sheikh IA, Jiffri EH, Ashraf GM, Kamal MA, Beg MA. Structural studies on inhibitory mechanisms of antibiotic, corticosteroid and catecholamine molecules on lactoperoxidase. Life Sci 2018; 207:412-419. [PMID: 29953881 DOI: 10.1016/j.lfs.2018.06.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 06/13/2018] [Accepted: 06/25/2018] [Indexed: 12/17/2022]
Abstract
AIM Lactoperoxidase (LPO) is an essential protein with broad spectrum antimicrobial activity present in mammalian milk. It imparts immunity to infants against wide range of pathogenic infections. Several in vitro studies have shown inhibition of LPO activity by pharmaceutical compounds including commonly used antibiotics such as ampicillin and gentamicin, and molecules like prednisolone, norepinephrine, etc. Prescription of such drugs to lactating mothers might have adverse health effects on infants. The aim of our study was the elucidation of the structural aspects of the inhibitory mechanism of ampicillin, gentamicin, amoxicillin, prednisolone and norepinephrine on LPO. MATERIAL AND METHODS Three dimensional structure of camel LPO (cLPO) was developed using homology modeling and used for in silico experimental studies. The Schrödinger induced fit docking along with binding affinity estimation experiments were performed. The cLPO and Ligands were prepared using Protein Preparation Wizard and Ligprep modules available in Schrodinger suite. For estimating Binding affinity Prime Molecular Mechanics with Generalized Born and Surface Area (MMGB-SA) module was used. KEY RESULTS The five drug ligands formed three to five hydrogen bonding interactions with cLPO. Amino acids Arg-231, Asp-232, Ser-370, Arg-371 and Glu-374 of cLPO were crucial for these interactions. The binding affinity values for gentamicin were highest and for norepinephrine were the lowest. SIGNIFICANCE This study concludes that the five drug molecules show potential ability to inhibit the LPO activity. Further, a very high sequence similarity of cLPO with human LPO imparts high significance to these conclusions in relation to human health especially in new born infants.
Collapse
Affiliation(s)
- Ishfaq A Sheikh
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia.
| | - Essam H Jiffri
- Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ghulam Md Ashraf
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohammad A Kamal
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohd A Beg
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| |
Collapse
|
179
|
Antimicrobial actions of dual oxidases and lactoperoxidase. J Microbiol 2018; 56:373-386. [PMID: 29858825 DOI: 10.1007/s12275-018-7545-1] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 02/16/2018] [Accepted: 02/19/2018] [Indexed: 12/11/2022]
Abstract
The NOX/DUOX family of NADPH oxidases are transmembrane proteins generating reactive oxygen species as their primary enzymatic products. NADPH oxidase (NOX) 1-5 and Dual oxidase (DUOX) 1 and 2 are members of this family. These enzymes have several biological functions including immune defense, hormone biosynthesis, fertilization, cell proliferation and differentiation, extracellular matrix formation and vascular regulation. They are found in a variety of tissues such as the airways, salivary glands, colon, thyroid gland and lymphoid organs. The discovery of NADPH oxidases has drastically transformed our view of the biology of reactive oxygen species and oxidative stress. Roles of several isoforms including DUOX1 and DUOX2 in host innate immune defense have been implicated and are still being uncovered. DUOX enzymes highly expressed in the respiratory and salivary gland epithelium have been proposed as the major sources of hydrogen peroxide supporting mucosal oxidative antimicrobial defenses. In this review, we shortly present data on DUOX discovery, structure and function, and provide a detailed, up-to-date summary of discoveries regarding antibacterial, antiviral, antifungal, and antiparasitic functions of DUOX enzymes. We also present all the literature describing the immune functions of lactoperoxidase, an enzyme working in partnership with DUOX to produce antimicrobial substances.
Collapse
|
180
|
Sirokmány G, Kovács HA, Lázár E, Kónya K, Donkó Á, Enyedi B, Grasberger H, Geiszt M. Peroxidasin-mediated crosslinking of collagen IV is independent of NADPH oxidases. Redox Biol 2018; 16:314-321. [PMID: 29573705 PMCID: PMC5952998 DOI: 10.1016/j.redox.2018.03.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 03/13/2018] [Indexed: 12/19/2022] Open
Abstract
Collagen IV is a major component of the basement membrane in epithelial tissues. The NC1 domains of collagen IV protomers are covalently linked together through sulfilimine bonds, the formation of which is catalyzed by peroxidasin. Although hydrogen peroxide is essential for this reaction, the exact source of the oxidant remains elusive. Members of the NOX/DUOX NADPH oxidase family are specifically devoted to the production of superoxide and hydrogen peroxide. Our aim in this study was to find out if NADPH oxidases contribute in vivo to the formation of collagen IV sulfilimine crosslinks. We used multiple genetically modified in vivo model systems to provide a detailed assessment of this question. Our data indicate that in various peroxidasin-expressing tissues sulfilimine crosslinks between the NC1 domains of collagen IV can be readily detected in the absence of functioning NADPH oxidases. We also analyzed how subatmospheric oxygen levels influence the collagen IV network in collagen-producing cultured cells with rapid matrix turnover. We showed that collagen IV crosslinks remain intact even under strongly hypoxic conditions. Our hypothesis is that during collagen IV network formation PXDN cooperates with a NOX/DUOX-independent H2O2 source that is functional also at very low ambient oxygen levels.
Collapse
Affiliation(s)
- Gábor Sirokmány
- Department of Physiology, Faculty of Medicine, Semmelweis University, PO Box 259, H-1444 Budapest, Hungary; "Momentum" Peroxidase Enzyme Research Group of the Semmelweis University and the Hungarian Academy of Sciences, Budapest, Hungary
| | - Hajnal A Kovács
- Department of Physiology, Faculty of Medicine, Semmelweis University, PO Box 259, H-1444 Budapest, Hungary; "Momentum" Peroxidase Enzyme Research Group of the Semmelweis University and the Hungarian Academy of Sciences, Budapest, Hungary
| | - Enikő Lázár
- Department of Physiology, Faculty of Medicine, Semmelweis University, PO Box 259, H-1444 Budapest, Hungary; "Momentum" Peroxidase Enzyme Research Group of the Semmelweis University and the Hungarian Academy of Sciences, Budapest, Hungary
| | - Krisztina Kónya
- Department of Physiology, Faculty of Medicine, Semmelweis University, PO Box 259, H-1444 Budapest, Hungary; "Momentum" Peroxidase Enzyme Research Group of the Semmelweis University and the Hungarian Academy of Sciences, Budapest, Hungary
| | - Ágnes Donkó
- Department of Physiology, Faculty of Medicine, Semmelweis University, PO Box 259, H-1444 Budapest, Hungary; "Momentum" Peroxidase Enzyme Research Group of the Semmelweis University and the Hungarian Academy of Sciences, Budapest, Hungary
| | - Balázs Enyedi
- Department of Physiology, Faculty of Medicine, Semmelweis University, PO Box 259, H-1444 Budapest, Hungary
| | - Helmut Grasberger
- Division of Gastroenterology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Miklós Geiszt
- Department of Physiology, Faculty of Medicine, Semmelweis University, PO Box 259, H-1444 Budapest, Hungary; "Momentum" Peroxidase Enzyme Research Group of the Semmelweis University and the Hungarian Academy of Sciences, Budapest, Hungary.
| |
Collapse
|
181
|
Basak M, Dutta S, Chowdhury M. Wild raspberry: Antioxidant fruits from Eastern Himalaya. J Food Biochem 2018. [DOI: 10.1111/jfbc.12560] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Mridushree Basak
- Taxonomy of Angiosperms and Biosystematics Laboratory, Department of Botany; University of North Bengal; Siliguri West Bengal, 734 013 India
| | - Somit Dutta
- Cellular Immunology Laboratory, Department of Zoology; University of North Bengal; Siliguri West Bengal, 734 013 India
| | - Monoranjan Chowdhury
- Taxonomy of Angiosperms and Biosystematics Laboratory, Department of Botany; University of North Bengal; Siliguri West Bengal, 734 013 India
| |
Collapse
|
182
|
Myeloperoxidase in the inflamed colon: A novel target for treating inflammatory bowel disease. Arch Biochem Biophys 2018; 645:61-71. [DOI: 10.1016/j.abb.2018.03.012] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 03/08/2018] [Accepted: 03/12/2018] [Indexed: 12/17/2022]
|
183
|
Adefisayo MA, Adeyemi WJ, Alabi QK. Combined but not single administration of vitamin C and l-carnitine ameliorates cisplatin-induced gastric mucosa damage in male rats. Can J Physiol Pharmacol 2018; 96:830-838. [PMID: 29677454 DOI: 10.1139/cjpp-2017-0751] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Although cisplatin is a potent anticancer drug, it instigates oxidative and pro-inflammatory reactions that pose significant and distressing clinical symptoms. Therefore, this study investigated the effects of vitamin C and (or) l-carnitine on cisplatin-induced gastric mucosa damage in rat. The rats were allocated into 6 groups (n = 5). The control group received distilled water, while the treatment groups received cisplatin alone (CIP), or cisplatin with vitamin C, l-carnitine, or their combination. Cisplatin caused disruption of the gastric mucosa histoarchitecture and altered the mucus barrier function. Moreover, the stomach tissue of the CIP-treated group showed increased levels of oxidative stress markers (malondialdehyde and H2O2) and decreased activities of antioxidant (superoxide dismutase, glutathione peroxidase, catalase, glutathione S-transferase) and non-antioxidant (reduced glutathione) enzymes. These deleterious events were accompanied with significant increases in pro-inflammatory cytokines and inflammatory infiltration markers, myeloperoxidase and inducible nitric oxide synthase. However, the administration of both vitamin C and l-carnitine, and not either of the two showed additive effects in attenuating the adverse effects of cisplatin. The histological results agreed with the biochemical assays. The study concluded that the combined administration of vitamin C and l-carnitine, but not the single therapy, could prevent the adverse effects of cisplatin on gastric tissue.
Collapse
Affiliation(s)
- Modinat Adebukola Adefisayo
- a Department of Physiology, Faculty of Basic Medical Sciences, University of Medical Sciences, Ondo State, Nigeria.,b Department of Physiological Sciences, Faculty of Basic Medical Sciences, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria
| | - Wale Johnson Adeyemi
- c Department of Physiology, Faculty of Basic Medical Sciences, University of Ilorin, Ilorin, Kwara State, Nigeria
| | - Quadri Kunle Alabi
- b Department of Physiological Sciences, Faculty of Basic Medical Sciences, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria.,d Department of Haematology and Blood Transfusion, Faculty of Basic Medical Sciences, College of Medicine, Afe Babalola University, Ado Ekiti, Ekiti State, Nigeria
| |
Collapse
|
184
|
Khan AA, Alsahli MA, Rahmani AH. Myeloperoxidase as an Active Disease Biomarker: Recent Biochemical and Pathological Perspectives. Med Sci (Basel) 2018; 6:medsci6020033. [PMID: 29669993 PMCID: PMC6024665 DOI: 10.3390/medsci6020033] [Citation(s) in RCA: 132] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 04/04/2018] [Accepted: 04/11/2018] [Indexed: 12/15/2022] Open
Abstract
Myeloperoxidase (MPO) belongs to the family of heme-containing peroxidases, produced mostly from polymorphonuclear neutrophils. The active enzyme (150 kDa) is the product of the MPO gene located on long arm of chromosome 17. The primary gene product undergoes several modifications, such as the removal of introns and signal peptides, and leads to the formation of enzymatically inactive glycosylated apoproMPO which complexes with chaperons, producing inactive proMPO by the insertion of a heme moiety. The active enzyme is a homodimer of heavy and light chain protomers. This enzyme is released into the extracellular fluid after oxidative stress and different inflammatory responses. Myeloperoxidase is the only type of peroxidase that uses H₂O₂ to oxidize several halides and pseudohalides to form different hypohalous acids. So, the antibacterial activities of MPO involve the production of reactive oxygen and reactive nitrogen species. Controlled MPO release at the site of infection is of prime importance for its efficient activities. Any uncontrolled degranulation exaggerates the inflammation and can also lead to tissue damage even in absence of inflammation. Several types of tissue injuries and the pathogenesis of several other major chronic diseases such as rheumatoid arthritis, cardiovascular diseases, liver diseases, diabetes, and cancer have been reported to be linked with MPO-derived oxidants. Thus, the enhanced level of MPO activity is one of the best diagnostic tools of inflammatory and oxidative stress biomarkers among these commonly-occurring diseases.
Collapse
Affiliation(s)
- Amjad A Khan
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, AlQassim, P.O. Box 6699, Buraidah 51452, Saudi Arabia.
| | - Mohammed A Alsahli
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, AlQassim, P.O. Box 6699, Buraidah 51452, Saudi Arabia.
| | - Arshad H Rahmani
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, AlQassim, P.O. Box 6699, Buraidah 51452, Saudi Arabia.
| |
Collapse
|
185
|
Tonoyan L, Boyd A, Fleming GTA, Friel R, Gately CM, Mc Cay PH, O'Flaherty V. In vitro comparative cytotoxicity study of a novel biocidal iodo-thiocyanate complex. Toxicol In Vitro 2018; 50:264-273. [PMID: 29621560 DOI: 10.1016/j.tiv.2018.03.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 03/17/2018] [Accepted: 03/28/2018] [Indexed: 10/17/2022]
Abstract
Novel biocides, which avoid the induction of cross-resistance to antibiotics, are an urgent societal requirement. Here, we compared the cytotoxic and bactericidal effects of a new antimicrobial agent, the iodo-thiocyanate complex (ITC), with those of the common antiseptics, hydrogen peroxide (H2O2), povidone iodine (PVP-I) and Lugol's iodine (Lugol). The antimicrobials were co-incubated for 10 min with HeLa and Escherichia coli cells in the presence and absence of organic matter (Dulbecco's modified Eagle's medium, supplemented with 10% fetal bovine serum). The cytotoxic concentrations of ITC were equivalent to its bactericidal concentrations (7.8 μg ml-1). By contrast, cytotoxic effects of H2O2, PVP-I and Lugol were apparent at concentrations lower than their bactericidal concentrations (250, 250 and 125 μg ml-1, respectively). The cellular effects of ITC were not quenched by organic matter, unlike the other antiseptics. ITC, PVP-I and Lugol had hemolytic effect on horse erythrocytes at high concentrations, while H2O2 showed no hemolysis. ITC, at 30 or 300 μg ml-1, did not cause DNA breakage in HeLa cells as assessed by an in vitro comet assay in the absence of S9 metabolic activation, whereas H2O2 caused extensive single-strand DNA breaks. The pronounced antimicrobial potency of ITC and its favorable cytotoxicity profile suggests that ITC should be considered for antiseptic applications.
Collapse
Affiliation(s)
- Lilit Tonoyan
- Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway, University Road, Galway, Ireland.
| | - Aoife Boyd
- Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway, University Road, Galway, Ireland
| | - Gerard T A Fleming
- Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway, University Road, Galway, Ireland
| | - Ruairi Friel
- Westway Health Ltd., Unit 204, Business Innovation Centre, National University of Ireland Galway, Ireland
| | - Carol M Gately
- Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway, University Road, Galway, Ireland
| | - Paul H Mc Cay
- Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway, University Road, Galway, Ireland
| | - Vincent O'Flaherty
- Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway, University Road, Galway, Ireland.
| |
Collapse
|
186
|
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.
Collapse
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;
| |
Collapse
|
187
|
Nicolussi A, Auer M, Sevcnikar B, Paumann-Page M, Pfanzagl V, Zámocký M, Hofbauer S, Furtmüller PG, Obinger C. Posttranslational modification of heme in peroxidases – Impact on structure and catalysis. Arch Biochem Biophys 2018; 643:14-23. [DOI: 10.1016/j.abb.2018.02.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 02/12/2018] [Accepted: 02/13/2018] [Indexed: 12/16/2022]
|
188
|
Yang HL, Zhou WJ, Gu CJ, Meng YH, Shao J, Li DJ, Li MQ. Pleiotropic roles of melatonin in endometriosis, recurrent spontaneous abortion, and polycystic ovary syndrome. Am J Reprod Immunol 2018; 80:e12839. [PMID: 29493042 DOI: 10.1111/aji.12839] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Accepted: 02/06/2018] [Indexed: 12/22/2022] Open
Abstract
Melatonin is a neurohormone synthesized from the aromatic amino acid tryptophan mainly by the pineal gland of mammals. Melatonin acts as a broad-spectrum antioxidant, powerful free radical scavenger, anti-inflammatory agent, anticarcinogenic factor, sleep inducer and regulator of the circadian rhythm, and potential immunoregulator. Melatonin and reproductive system are interrelated under both physiological and pathological conditions. Oxidative stress, inflammation, and immune dysregulation are associated with the pathogenesis of the female reproductive system which causes endometriosis (EMS), recurrent spontaneous abortion (RSA), and polycystic ovary syndrome (PCOS). Accumulating studies have indicated that melatonin plays pleiotropic and essential roles in these obstetrical and gynecological disorders and would be a candidate therapeutic drug to regulate inflammation and immune function and protect special cells or organs. Here, we systematically review the pleiotropic roles of melatonin in EMS, RSA, and PCOS to explore its pathological implications and treatment potential.
Collapse
Affiliation(s)
- Hui-Li Yang
- Laboratory for Reproductive Immunology, Key Laboratory of Reproduction Regulation of NPFPC, SIPPR, IRD, Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Hospital of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai, China
| | - Wen-Jie Zhou
- Laboratory for Reproductive Immunology, Key Laboratory of Reproduction Regulation of NPFPC, SIPPR, IRD, Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Hospital of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai, China
| | - Chun-Jie Gu
- Laboratory for Reproductive Immunology, Key Laboratory of Reproduction Regulation of NPFPC, SIPPR, IRD, Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Hospital of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai, China
| | - Yu-Han Meng
- Reproductive Medical Center, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Jun Shao
- Department of Gynecology, Hospital of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai, China
| | - Da-Jin Li
- Laboratory for Reproductive Immunology, Key Laboratory of Reproduction Regulation of NPFPC, SIPPR, IRD, Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Hospital of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai, China
| | - Ming-Qing Li
- Laboratory for Reproductive Immunology, Key Laboratory of Reproduction Regulation of NPFPC, SIPPR, IRD, Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Hospital of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai, China
| |
Collapse
|
189
|
Sitole BN, Mavri-Damelin D. Peroxidasin is regulated by the epithelial-mesenchymal transition master transcription factor Snai1. Gene 2018; 646:195-202. [DOI: 10.1016/j.gene.2018.01.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 12/01/2017] [Accepted: 01/02/2018] [Indexed: 12/12/2022]
|
190
|
A pivotal role for NF-κB in the macrophage inflammatory response to the myeloperoxidase oxidant hypothiocyanous acid. Arch Biochem Biophys 2018; 642:23-30. [DOI: 10.1016/j.abb.2018.01.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 01/04/2018] [Accepted: 01/29/2018] [Indexed: 01/04/2023]
|
191
|
Filipovic MR, Zivanovic J, Alvarez B, Banerjee R. Chemical Biology of H 2S Signaling through Persulfidation. Chem Rev 2018; 118:1253-1337. [PMID: 29112440 PMCID: PMC6029264 DOI: 10.1021/acs.chemrev.7b00205] [Citation(s) in RCA: 599] [Impact Index Per Article: 99.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Signaling by H2S is proposed to occur via persulfidation, a posttranslational modification of cysteine residues (RSH) to persulfides (RSSH). Persulfidation provides a framework for understanding the physiological and pharmacological effects of H2S. Due to the inherent instability of persulfides, their chemistry is understudied. In this review, we discuss the biologically relevant chemistry of H2S and the enzymatic routes for its production and oxidation. We cover the chemical biology of persulfides and the chemical probes for detecting them. We conclude by discussing the roles ascribed to protein persulfidation in cell signaling pathways.
Collapse
Affiliation(s)
- Milos R. Filipovic
- Univeristy of Bordeaux, IBGC, UMR 5095, F-33077 Bordeaux, France
- CNRS, IBGC, UMR 5095, F-33077 Bordeaux, France
| | - Jasmina Zivanovic
- Univeristy of Bordeaux, IBGC, UMR 5095, F-33077 Bordeaux, France
- CNRS, IBGC, UMR 5095, F-33077 Bordeaux, France
| | - Beatriz Alvarez
- Laboratorio de Enzimología, Facultad de Ciencias and Center for Free Radical and Biomedical Research, Universidad de la Republica, 11400 Montevideo, Uruguay
| | - Ruma Banerjee
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, Michigan 48109-0600, United States
| |
Collapse
|
192
|
Wang Y, Yu YX, Luan Y, An J, Yin DG, Zhang XY. Bioactivation of 1-chloro-2-hydroxy-3-butene, an in vitro metabolite of 1,3-butadiene, by rat liver microsomes. Chem Biol Interact 2018; 282:36-44. [DOI: 10.1016/j.cbi.2018.01.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Revised: 12/03/2017] [Accepted: 01/05/2018] [Indexed: 01/15/2023]
|
193
|
Fine Regulation of Neutrophil Oxidative Status and Apoptosis by Ceruloplasmin and Its Derivatives. Cells 2018; 7:cells7010008. [PMID: 29329239 PMCID: PMC5789281 DOI: 10.3390/cells7010008] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 12/30/2017] [Accepted: 01/10/2018] [Indexed: 01/27/2023] Open
Abstract
Timely neutrophil apoptosis is an essential part of the resolution phase of acute inflammation. Ceruloplasmin, an acute-phase protein, which is the predominant copper-carrying protein in the blood, has been suggested to have a marked effect on neutrophil life span. The present work is a comparative study on the effects of intact holo-ceruloplasmin, its copper-free (apo-) and partially proteolyzed forms, and synthetic free peptides RPYLKVFNPR (883-892) and RRPYLKVFNPRR (882-893) on polymorphonuclear leukocyte (PMNL, neutrophil) oxidant status and apoptosis. The most pronounced effect on both investigated parameters was found with copper-containing samples, namely, intact and proteolyzed proteins. Both effectively reduced spontaneous and tumor necrosis factor-α (TNF-α)-induced extracellular and intracellular accumulation of superoxide radicals, but induced a sharp increase in the oxidation of intracellular 2',7'-dichlorofluorescein upon short exposure. Therefore, intact and proteolyzed ceruloplasmin have both anti- and pro-oxidant effects on PMNLs wherein the latter effect is diminished by TNF-α and lactoferrin. Additionally, all compounds investigated were determined to be inhibitors of delayed spontaneous apoptosis. Intact enzyme retained its pro-survival activity, whereas proteolytic degradation converts ceruloplasmin from a mild inhibitor to a potent activator of TNF-α-induced neutrophil apoptosis.
Collapse
|
194
|
Tantry IQ, Waris S, Habib S, Khan RH, Mahmood R, Ali A. Hypochlorous acid induced structural and conformational modifications in human DNA: A multi-spectroscopic study. Int J Biol Macromol 2018; 106:551-558. [DOI: 10.1016/j.ijbiomac.2017.08.051] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Revised: 08/06/2017] [Accepted: 08/07/2017] [Indexed: 01/09/2023]
|
195
|
Yu G, Liang Y, Zheng S, Zhang H. Inhibition of Myeloperoxidase by N-Acetyl Lysyltyrosylcysteine Amide Reduces Oxidative Stress–Mediated Inflammation, Neuronal Damage, and Neural Stem Cell Injury in a Murine Model of Stroke. J Pharmacol Exp Ther 2017; 364:311-322. [DOI: 10.1124/jpet.117.245688] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 12/07/2017] [Indexed: 12/19/2022] Open
|
196
|
Carroll L, Pattison DI, Davies JB, Anderson RF, Lopez-Alarcon C, Davies MJ. Formation and detection of oxidant-generated tryptophan dimers in peptides and proteins. Free Radic Biol Med 2017; 113:132-142. [PMID: 28962874 DOI: 10.1016/j.freeradbiomed.2017.09.020] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 09/21/2017] [Accepted: 09/24/2017] [Indexed: 01/08/2023]
Abstract
Free radicals are produced during physiological processes including metabolism and the immune response, as well as on exposure to multiple external stimuli. Many radicals react rapidly with proteins resulting in side-chain modification, backbone fragmentation, aggregation, and changes in structure and function. Due to its low oxidation potential, the indole ring of tryptophan (Trp) is a major target, with this resulting in the formation of indolyl radicals (Trp•). These undergo multiple reactions including ring opening and dimerization which can result in protein aggregation. The factors that govern Trp• dimerization, the rate constants for these reactions and the exact nature of the products are not fully elucidated. In this study, second-order rate constants were determined for Trp• dimerization in Trp-containing peptides to be 2-6 × 108M-1s-1 by pulse radiolysis. Peptide charge and molecular mass correlated negatively with these rate constants. Exposure of Trp-containing peptides to steady-state radiolysis in the presence of NaN3 resulted in consumption of the parent peptide, and detection by LC-MS of up to 4 different isomeric Trp-Trp cross-links. Similar species were detected with other oxidants, including CO3•- (from the HCO3- -dependent peroxidase activity of bovine superoxide dismutase) and peroxynitrous acid (ONOOH) in the presence or absence of HCO3-. Trp-Trp species were also isolated and detected after alkaline hydrolysis of the oxidized peptides and proteins. These studies demonstrate that Trp• formed on peptides and proteins undergo rapid recombination reactions to form Trp-Trp cross-linked species. These products may serve as markers of radical-mediated protein damage, and represent an additional pathway to protein aggregation in cellular dysfunction and disease.
Collapse
Affiliation(s)
- Luke Carroll
- The Heart Research Institute, Newtown, Australia; Sydney Medical School, University of Sydney, Australia; Panum Institute, University of Copenhagen, Denmark
| | - David I Pattison
- The Heart Research Institute, Newtown, Australia; Sydney Medical School, University of Sydney, Australia
| | - Justin B Davies
- Australian Nuclear Science and Technology Organisation, Lucas Heights, Australia
| | | | | | - Michael J Davies
- The Heart Research Institute, Newtown, Australia; Sydney Medical School, University of Sydney, Australia; Panum Institute, University of Copenhagen, Denmark.
| |
Collapse
|
197
|
Joseph P. Transcriptomics in toxicology. Food Chem Toxicol 2017; 109:650-662. [PMID: 28720289 PMCID: PMC6419952 DOI: 10.1016/j.fct.2017.07.031] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 07/12/2017] [Accepted: 07/14/2017] [Indexed: 12/11/2022]
Abstract
Xenobiotics, of which many are toxic, may enter the human body through multiple routes. Excessive human exposure to xenobiotics may exceed the body's capacity to defend against the xenobiotic-induced toxicity and result in potentially fatal adverse health effects. Prevention of the adverse health effects, potentially associated with human exposure to the xenobiotics, may be achieved by detecting the toxic effects at an early, reversible and, therefore, preventable stage. Additionally, an understanding of the molecular mechanisms underlying the toxicity may be helpful in preventing and/or managing the ensuing adverse health effects. Human exposures to a large number of xenobiotics are associated with hepatotoxicity or pulmonary toxicity. Global gene expression changes taking place in biological systems, in response to exposure to xenobiotics, may represent the early and mechanistically relevant cellular events contributing to the onset and progression of xenobiotic-induced adverse health outcomes. Hepatotoxicity and pulmonary toxicity resulting from exposure to xenobiotics are discussed as specific examples to demonstrate the potential application of transcriptomics or global gene expression analysis in the prevention of adverse health effects associated with exposure to xenobiotics.
Collapse
Affiliation(s)
- Pius Joseph
- Molecular Carcinogenesis Laboratory, Toxicology and Molecular Biology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health (NIOSH), Morgantown, WV, USA.
| |
Collapse
|
198
|
Minguet G, Franck T, Joris J, Serteyn D. Sevoflurane modulates the release of reactive oxygen species, myeloperoxidase, and elastase in human whole blood: Effects of different stimuli on neutrophil response to volatile anesthetic in vitro. Int J Immunopathol Pharmacol 2017; 30:362-370. [PMID: 29087224 PMCID: PMC5806810 DOI: 10.1177/0394632017739530] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Volatile anesthetics have been shown to modulate polymorphonuclear neutrophil (PMN) functions. The aim of this study was to examine the impact of clinically relevant concentrations of sevoflurane (SEVO), a volatile anesthetic, on the release of reactive oxygen species (ROS), myeloperoxidase (MPO), and elastase (EL) from human activated PMNs. For this purpose, samples of whole blood were collected from healthy volunteers and exposed in vitro to 2.3% or 4.6% SEVO in air. To assess for a stimulus-dependent effect of the volatile anesthetic, PMNs were activated using different validated protocols. Artificial stimulation of neutrophils involved either a combination of cytochalasin B (CB) and N-formyl-methionyl-leucyl-phenylalanine (fMLP) or phorbol 12-myristate 13-acetate (PMA). In addition, a combination of lipopolysaccharide (LPS) and tumor necrosis factor alpha (TNF-α) was also tested as a natural activation mean of PMNs. The production of ROS by PMNs was assessed by L-012 chemiluminescence. Total MPO and EL released in supernatant were measured by enzyme-linked immunosorbent assay (ELISA). Furthermore, degranulation of the active fraction of MPO was also measured by specific immunological extraction followed by enzymatic detection (SIEFED). Overall, SEVO enhanced the release of ROS, MPO, and EL following artificial stimulation of PMNs but the volatile anesthetic inhibited the degranulation of active MPO and EL after neutrophil exposure to LPS and TNF-α. This study highlighted that the effect of SEVO on activated PMNs is dependent on the conditions of cell stimulation. These properties should be taken into consideration in future studies investigating immunomodulatory effects of volatile anesthetics.
Collapse
Affiliation(s)
- Grégory Minguet
- 1 Department of Anesthesia and Intensive Care Medicine, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - Thierry Franck
- 2 Center for Oxygen Research and Development, Institute of Chemistry B6a, University of Liège, Liège, Belgium.,3 Department of Clinical Sciences, Anesthesiology and Equine Surgery, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Jean Joris
- 1 Department of Anesthesia and Intensive Care Medicine, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - Didier Serteyn
- 2 Center for Oxygen Research and Development, Institute of Chemistry B6a, University of Liège, Liège, Belgium.,3 Department of Clinical Sciences, Anesthesiology and Equine Surgery, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| |
Collapse
|
199
|
Colon S, Page-McCaw P, Bhave G. Role of Hypohalous Acids in Basement Membrane Homeostasis. Antioxid Redox Signal 2017; 27:839-854. [PMID: 28657332 PMCID: PMC5647493 DOI: 10.1089/ars.2017.7245] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 06/26/2017] [Indexed: 12/19/2022]
Abstract
SIGNIFICANCE Basement membranes (BMs) are sheet-like structures of specialized extracellular matrix that underlie nearly all tissue cell layers including epithelial, endothelial, and muscle cells. BMs not only provide structural support but are also critical for the development, maintenance, and repair of organs. Animal heme peroxidases generate highly reactive hypohalous acids extracellularly and, therefore, target BMs for oxidative modification. Given the importance of BMs in tissue structure and function, hypohalous acid-mediated oxidative modifications of BM proteins represent a key mechanism in normal development and pathogenesis of disease. Recent Advances: Peroxidasin (PXDN), a BM-associated animal heme peroxidase, generates hypobromous acid (HOBr) to form sulfilimine cross-links within the collagen IV network of BM. These cross-links stabilize BM and are critical for animal tissue development. These findings highlight a paradoxical anabolic role for HOBr, which typically damages protein structure leading to dysfunction. CRITICAL ISSUES The molecular mechanism whereby PXDN uses HOBr as a reactive intermediate to cross-link collagen IV, yet avoid collateral damage to nearby BM proteins, remains unclear. FUTURE DIRECTIONS The exact identification and functional impact of specific hypohalous acid-mediated modifications of BM proteins need to be addressed to connect these modifications to tissue development and pathogenesis of disease. As seen with the sulfilimine cross-link of collagen IV, hypohalous acid oxidative events may be beneficial in select situations rather than uniformly deleterious. Antioxid. Redox Signal. 27, 839-854.
Collapse
Affiliation(s)
- Selene Colon
- Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Biological Sciences, Tennessee State University, Nashville, Tennessee
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Patrick Page-McCaw
- Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Gautam Bhave
- Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt Center for Matrix Biology, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| |
Collapse
|
200
|
Arslan S, Berkan Ö, Bayyurt B, Beton O, Şahin NLÖL, Aydemir EI. Effects of MPO-463G/A and - 129G/A polymorphisms on coronary artery disease risk and patient survival in a Turkish population. Biomed Rep 2017; 7:547-552. [PMID: 29188060 DOI: 10.3892/br.2017.995] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 09/21/2017] [Indexed: 12/18/2022] Open
Abstract
Myeloperoxidase (MPO) is an oxidative hemoprotein compound expressed in polymorphonuclear leukocytes that contributes to inflammatory responses. Coronary artery disease (CAD), as the most prevalent form of heart disease, is considered to originate from an interaction between genetic and environmental factors. In the present study, the potential associations between MPO-463G/A and -129G/A polymorphisms with CAD were investigated in a Turkish population using a polymerase chain reaction-based restriction fragment length polymorphism (RFLP) assay technique. To the best of our knowledge, the study was the first to examine the association of MPO-463G/A and -129G/A with patient survival rate in a Turkish population. The study population consisted of 201 patients with CAD and 201 healthy controls. The results indicated that there was a significant association of the GA genotype of MPO-463G/A with the case population (P=0.048). Meanwhile, in the patients with CAD, the frequency distributions of the MPO-129A allele (P=0.006) and GA genotype (P=0.001) were significantly increased compared with the G allele and GG genotype, respectively, in CAD patients. Additionally, compared with the GG genotype, the frequency distribution of MPO-129A was significantly increased in the patient group regarding smoking status (P=0.001) and the presence of hypercholesterolemia (P=0.028). However, survival analysis did not detect an effect of either polymorphism on the survival rate of the CAD patients (P>0.05). Therefore, the MPO-129GA genotype may be a significant risk factor for the development of CAD.
Collapse
Affiliation(s)
- Serdal Arslan
- Department of Medical Biology, Faculty of Medicine, Cumhuriyet University, 58140 Sivas, Turkey
| | - Öcal Berkan
- Department of Cardiovascular Surgery, Heart Center, Cumhuriyet University, 58140 Sivas, Turkey
| | - Burcu Bayyurt
- Department of Medical Biology, Faculty of Medicine, Cumhuriyet University, 58140 Sivas, Turkey
| | - Osman Beton
- Department of Cardiology, Heart Center, Cumhuriyet University, 58140 Sivas, Turkey
| | - Ni L Özbi Lüm Şahin
- Department of Molecular Biology and Genetics, Faculty of Science, Cumhuriyet University, 58140 Sivas, Turkey
| | - Eylem Itır Aydemir
- Department of Statistics, Faculty of Science, Cumhuriyet University, 58140 Sivas, Turkey
| |
Collapse
|