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Haigh S, Brown ZL, Shivers MA, Sellers HG, West MA, Barman SA, Stepp DW, Csanyi G, Fulton DJR. A Reappraisal of the Utility of L-012 to Measure Superoxide from Biologically Relevant Sources. Antioxidants (Basel) 2023; 12:1689. [PMID: 37759992 PMCID: PMC10525458 DOI: 10.3390/antiox12091689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 08/21/2023] [Accepted: 08/25/2023] [Indexed: 09/29/2023] Open
Abstract
The detection of superoxide anion (O2●-) in biological tissues remains challenging. Barriers to convenient and reproducible measurements include expensive equipment, custom probes, and the need for high sensitivity and specificity. The luminol derivative, L-012, has been used to measure O2●- since 1993 with mixed results and concerns over specificity. The goal of this study was to better define the conditions for use and their specificity. We found that L-012 coupled with depolymerized orthovanadate, a relatively impermeable tyrosine phosphatase inhibitor, yielded a highly sensitive approach to detect extracellular O2●-. In O2●- producing HEK-NOX5 cells, orthovanadate increased L-012 luminescence 100-fold. The combination of L-012 and orthovanadate was highly sensitive, stable, scalable, completely reversed by superoxide dismutase, and selective for O2●- generating NOXes versus NOX4, which produces H2O2. Moreover, there was no signal from cells transfected with NOS3 (NO●) and NOS2(ONOO-). To exclude the effects of altered tyrosine phosphorylation, O2●- was detected using non-enzymatic synthesis with phenazine methosulfate and via novel coupling of L-012 with niobium oxalate, which was less active in inducing tyrosine phosphorylation. Overall, our data shows that L-012 coupled with orthovanadate or other periodic group 5 salts yields a reliable, sensitive, and specific approach to measuring extracellular O2●- in biological systems.
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Affiliation(s)
- Stephen Haigh
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney Walker Blvd, CB 3316, Augusta, GA 30909, USA
| | - Zach L. Brown
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney Walker Blvd, CB 3316, Augusta, GA 30909, USA
| | - Mitch A. Shivers
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney Walker Blvd, CB 3316, Augusta, GA 30909, USA
| | - Hunter G. Sellers
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney Walker Blvd, CB 3316, Augusta, GA 30909, USA
| | - Madison A. West
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney Walker Blvd, CB 3316, Augusta, GA 30909, USA
| | - Scott A. Barman
- Department of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, 1460 Laney Walker Blvd, CB 3316, Augusta, GA 30909, USA
| | - David W. Stepp
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney Walker Blvd, CB 3316, Augusta, GA 30909, USA
| | - Gabor Csanyi
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney Walker Blvd, CB 3316, Augusta, GA 30909, USA
- Department of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, 1460 Laney Walker Blvd, CB 3316, Augusta, GA 30909, USA
| | - David J. R. Fulton
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney Walker Blvd, CB 3316, Augusta, GA 30909, USA
- David Fulton Vascular Biology Center, Department of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, 1460 Laney Walker Blvd, CB 3316, Augusta, GA 30909, USA
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Zhao GJ, Zhao CL, Ouyang S, Deng KQ, Zhu L, Montezano AC, Zhang C, Hu F, Zhu XY, Tian S, Liu X, Ji YX, Zhang P, Zhang XJ, She ZG, Touyz RM, Li H. Ca 2+-Dependent NOX5 (NADPH Oxidase 5) Exaggerates Cardiac Hypertrophy Through Reactive Oxygen Species Production. Hypertension 2020; 76:827-838. [PMID: 32683902 DOI: 10.1161/hypertensionaha.120.15558] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
NOX5 (NADPH oxidase 5) is a homolog of the gp91phox subunit of the phagocyte NOX, which generates reactive oxygen species. NOX5 is involved in sperm motility and vascular contraction and has been implicated in diabetic nephropathy, atherosclerosis, and stroke. The function of NOX5 in the cardiac hypertrophy is unknown. Because NOX5 is a Ca2+-sensitive, procontractile NOX isoform, we questioned whether it plays a role in cardiac hypertrophy. Studies were performed in (1) cardiac tissue from patients undergoing heart transplant for cardiomyopathy and heart failure, (2) NOX5-expressing rat cardiomyocytes, and (3) mice expressing human NOX5 in a cardiomyocyte-specific manner. Cardiac hypertrophy was induced in mice by transverse aorta coarctation and Ang II (angiotensin II) infusion. NOX5 expression was increased in human failing hearts. Rat cardiomyocytes infected with adenoviral vector encoding human NOX5 cDNA exhibited elevated reactive oxygen species levels with significant enlargement and associated increased expression of ANP (atrial natriuretic peptides) and β-MHC (β-myosin heavy chain) and prohypertrophic genes (Nppa, Nppb, and Myh7) under Ang II stimulation. These effects were reduced by N-acetylcysteine and diltiazem. Pressure overload and Ang II infusion induced left ventricular hypertrophy, interstitial fibrosis, and contractile dysfunction, responses that were exaggerated in cardiac-specific NOX5 trangenic mice. These phenomena were associated with increased reactive oxygen species levels and activation of redox-sensitive MAPK (mitogen-activated protein kinase). N-acetylcysteine treatment reduced cardiac oxidative stress and attenuated cardiac hypertrophy in NOX5 trangenic. Our study defines Ca2+-regulated NOX5 as an important NOX isoform involved in oxidative stress- and MAPK-mediated cardiac hypertrophy and contractile dysfunction.
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Affiliation(s)
- Guo-Jun Zhao
- From the Department of Cardiology, Renmin Hospital of Wuhan University, China (G.-J.Z., C.-L.Z., L.-H.Z., C.Z., X.-Y.Z., S.T., X.-J.Z., Z.-G.S., H.L.).,Institute of Model Animal of Wuhan University, China (G.-J.Z., C.-L.Z., S.O., K.-Q.D., L.-H.Z., C.Z., F.H., X.-.Z., S.T., X.L., Y.-X.J., P.Z., X.-J.Z., Z.-G.S., H.L.)
| | - Chang-Ling Zhao
- From the Department of Cardiology, Renmin Hospital of Wuhan University, China (G.-J.Z., C.-L.Z., L.-H.Z., C.Z., X.-Y.Z., S.T., X.-J.Z., Z.-G.S., H.L.).,Institute of Model Animal of Wuhan University, China (G.-J.Z., C.-L.Z., S.O., K.-Q.D., L.-H.Z., C.Z., F.H., X.-.Z., S.T., X.L., Y.-X.J., P.Z., X.-J.Z., Z.-G.S., H.L.)
| | - Shan Ouyang
- Institute of Model Animal of Wuhan University, China (G.-J.Z., C.-L.Z., S.O., K.-Q.D., L.-H.Z., C.Z., F.H., X.-.Z., S.T., X.L., Y.-X.J., P.Z., X.-J.Z., Z.-G.S., H.L.).,Basic Medical School, Wuhan University, China (S.O., H.L.)
| | - Ke-Qiong Deng
- Institute of Model Animal of Wuhan University, China (G.-J.Z., C.-L.Z., S.O., K.-Q.D., L.-H.Z., C.Z., F.H., X.-.Z., S.T., X.L., Y.-X.J., P.Z., X.-J.Z., Z.-G.S., H.L.).,Department of Cardiology (K.-Q.D.), Zhongnan Hospital of Wuhan University, China
| | - Lihua Zhu
- From the Department of Cardiology, Renmin Hospital of Wuhan University, China (G.-J.Z., C.-L.Z., L.-H.Z., C.Z., X.-Y.Z., S.T., X.-J.Z., Z.-G.S., H.L.).,Institute of Model Animal of Wuhan University, China (G.-J.Z., C.-L.Z., S.O., K.-Q.D., L.-H.Z., C.Z., F.H., X.-.Z., S.T., X.L., Y.-X.J., P.Z., X.-J.Z., Z.-G.S., H.L.)
| | - Augusto C Montezano
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Centre, University of Glasgow, United Kingdom (A.C.M., R.M.T.)
| | - Changjiang Zhang
- From the Department of Cardiology, Renmin Hospital of Wuhan University, China (G.-J.Z., C.-L.Z., L.-H.Z., C.Z., X.-Y.Z., S.T., X.-J.Z., Z.-G.S., H.L.).,Institute of Model Animal of Wuhan University, China (G.-J.Z., C.-L.Z., S.O., K.-Q.D., L.-H.Z., C.Z., F.H., X.-.Z., S.T., X.L., Y.-X.J., P.Z., X.-J.Z., Z.-G.S., H.L.)
| | - Fengjiao Hu
- Institute of Model Animal of Wuhan University, China (G.-J.Z., C.-L.Z., S.O., K.-Q.D., L.-H.Z., C.Z., F.H., X.-.Z., S.T., X.L., Y.-X.J., P.Z., X.-J.Z., Z.-G.S., H.L.).,Medical Science Research Center (F.H., X.L., Y.-X.J., P.Z., H.L.), Zhongnan Hospital of Wuhan University, China
| | - Xue-Yong Zhu
- From the Department of Cardiology, Renmin Hospital of Wuhan University, China (G.-J.Z., C.-L.Z., L.-H.Z., C.Z., X.-Y.Z., S.T., X.-J.Z., Z.-G.S., H.L.)
| | - Song Tian
- Institute of Model Animal of Wuhan University, China (G.-J.Z., C.-L.Z., S.O., K.-Q.D., L.-H.Z., C.Z., F.H., X.-.Z., S.T., X.L., Y.-X.J., P.Z., X.-J.Z., Z.-G.S., H.L.)
| | - Xiaolan Liu
- Institute of Model Animal of Wuhan University, China (G.-J.Z., C.-L.Z., S.O., K.-Q.D., L.-H.Z., C.Z., F.H., X.-.Z., S.T., X.L., Y.-X.J., P.Z., X.-J.Z., Z.-G.S., H.L.).,Medical Science Research Center (F.H., X.L., Y.-X.J., P.Z., H.L.), Zhongnan Hospital of Wuhan University, China
| | - Yan-Xiao Ji
- Institute of Model Animal of Wuhan University, China (G.-J.Z., C.-L.Z., S.O., K.-Q.D., L.-H.Z., C.Z., F.H., X.-.Z., S.T., X.L., Y.-X.J., P.Z., X.-J.Z., Z.-G.S., H.L.).,Medical Science Research Center (F.H., X.L., Y.-X.J., P.Z., H.L.), Zhongnan Hospital of Wuhan University, China
| | - Peng Zhang
- Institute of Model Animal of Wuhan University, China (G.-J.Z., C.-L.Z., S.O., K.-Q.D., L.-H.Z., C.Z., F.H., X.-.Z., S.T., X.L., Y.-X.J., P.Z., X.-J.Z., Z.-G.S., H.L.).,Medical Science Research Center (F.H., X.L., Y.-X.J., P.Z., H.L.), Zhongnan Hospital of Wuhan University, China
| | - Xiao-Jing Zhang
- Institute of Model Animal of Wuhan University, China (G.-J.Z., C.-L.Z., S.O., K.-Q.D., L.-H.Z., C.Z., F.H., X.-.Z., S.T., X.L., Y.-X.J., P.Z., X.-J.Z., Z.-G.S., H.L.)
| | - Zhi-Gang She
- From the Department of Cardiology, Renmin Hospital of Wuhan University, China (G.-J.Z., C.-L.Z., L.-H.Z., C.Z., X.-Y.Z., S.T., X.-J.Z., Z.-G.S., H.L.).,Institute of Model Animal of Wuhan University, China (G.-J.Z., C.-L.Z., S.O., K.-Q.D., L.-H.Z., C.Z., F.H., X.-.Z., S.T., X.L., Y.-X.J., P.Z., X.-J.Z., Z.-G.S., H.L.)
| | - Rhian M Touyz
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Centre, University of Glasgow, United Kingdom (A.C.M., R.M.T.)
| | - Hongliang Li
- From the Department of Cardiology, Renmin Hospital of Wuhan University, China (G.-J.Z., C.-L.Z., L.-H.Z., C.Z., X.-Y.Z., S.T., X.-J.Z., Z.-G.S., H.L.).,Institute of Model Animal of Wuhan University, China (G.-J.Z., C.-L.Z., S.O., K.-Q.D., L.-H.Z., C.Z., F.H., X.-.Z., S.T., X.L., Y.-X.J., P.Z., X.-J.Z., Z.-G.S., H.L.).,Basic Medical School, Wuhan University, China (S.O., H.L.).,Medical Science Research Center (F.H., X.L., Y.-X.J., P.Z., H.L.), Zhongnan Hospital of Wuhan University, China
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Montezano AC, De Lucca Camargo L, Persson P, Rios FJ, Harvey AP, Anagnostopoulou A, Palacios R, Gandara ACP, Alves-Lopes R, Neves KB, Dulak-Lis M, Holterman CE, de Oliveira PL, Graham D, Kennedy C, Touyz RM. NADPH Oxidase 5 Is a Pro-Contractile Nox Isoform and a Point of Cross-Talk for Calcium and Redox Signaling-Implications in Vascular Function. J Am Heart Assoc 2018; 7:e009388. [PMID: 29907654 PMCID: PMC6220544 DOI: 10.1161/jaha.118.009388] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 05/07/2018] [Indexed: 12/02/2022]
Abstract
BACKGROUND NADPH Oxidase 5 (Nox5) is a calcium-sensitive superoxide-generating Nox. It is present in lower forms and higher mammals, but not in rodents. Nox5 is expressed in vascular cells, but the functional significance remains elusive. Given that contraction is controlled by calcium and reactive oxygen species, both associated with Nox5, we questioned the role of Nox5 in pro-contractile signaling and vascular function. METHODS AND RESULTS Transgenic mice expressing human Nox5 in a vascular smooth muscle cell-specific manner (Nox5 mice) and Rhodnius prolixus, an arthropod model that expresses Nox5 endogenoulsy, were studied. Reactive oxygen species generation was increased systemically and in the vasculature and heart in Nox5 mice. In Nox5-expressing mice, agonist-induced vasoconstriction was exaggerated and endothelium-dependent vasorelaxation was impaired. Vascular structural and mechanical properties were not influenced by Nox5. Vascular contractile responses in Nox5 mice were normalized by N-acetylcysteine and inhibitors of calcium channels, calmodulin, and endoplasmic reticulum ryanodine receptors, but not by GKT137831 (Nox1/4 inhibitor). At the cellular level, vascular changes in Nox5 mice were associated with increased vascular smooth muscle cell [Ca2+]i, increased reactive oxygen species and nitrotyrosine levels, and hyperphosphorylation of pro-contractile signaling molecules MLC20 (myosin light chain 20) and MYPT1 (myosin phosphatase target subunit 1). Blood pressure was similar in wild-type and Nox5 mice. Nox5 did not amplify angiotensin II effects. In R. prolixus, gastrointestinal smooth muscle contraction was blunted by Nox5 silencing, but not by VAS2870 (Nox1/2/4 inhibitor). CONCLUSIONS Nox5 is a pro-contractile Nox isoform important in redox-sensitive contraction. This involves calcium-calmodulin and endoplasmic reticulum-regulated mechanisms. Our findings define a novel function for vascular Nox5, linking calcium and reactive oxygen species to the pro-contractile molecular machinery in vascular smooth muscle cells.
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Affiliation(s)
- Augusto C Montezano
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom
| | | | - Patrik Persson
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom
| | - Francisco J Rios
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom
| | - Adam P Harvey
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom
| | | | - Roberto Palacios
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom
| | - Ana Caroline P Gandara
- Laboratório de Bioquímica de Artrópodes Hematófagos, Instituto de Bioquímica Médica Leopoldo De Meis, Programa de Biologia Molecular e Biotecnologia, Universidade Federal do Rio de Janeiro, Brazil
| | - Rheure Alves-Lopes
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom
| | - Karla B Neves
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom
| | - Maria Dulak-Lis
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom
| | - Chet E Holterman
- Kidney Research Centre, Ottawa Hospital Research Institute, University of Ottawa, Ontario, Canada
| | - Pedro Lagerblad de Oliveira
- Laboratório de Bioquímica de Artrópodes Hematófagos, Instituto de Bioquímica Médica Leopoldo De Meis, Programa de Biologia Molecular e Biotecnologia, Universidade Federal do Rio de Janeiro, Brazil
| | - Delyth Graham
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom
| | - Christopher Kennedy
- Kidney Research Centre, Ottawa Hospital Research Institute, University of Ottawa, Ontario, Canada
| | - Rhian M Touyz
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom
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