1
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Wei CC, Razzak AA, Ghasemi H, Khedri R, Fraase A. Ca 2+ binding shifts dimeric dual oxidase's truncated EF-hand domain to monomer. Biophys Chem 2024; 312:107271. [PMID: 38852484 DOI: 10.1016/j.bpc.2024.107271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 04/17/2024] [Accepted: 05/22/2024] [Indexed: 06/11/2024]
Abstract
Hydrogen peroxide, produced by Dual Oxidase (Duox), is essential for thyroid hormone synthesis. Duox activation involves Ca2+ binding to its EF-hand Domain (EFD), which contains two EF-hands (EFs). In this study, we characterized a truncated EFD using spectrometry, calorimetry, electrophoretic mobility, and gel filtration to obtain its Ca2+ binding thermodynamic and kinetics, as well as to assess the associated conformational changes. Our results revealed that its 2nd EF-hand (EF2) exhibits a strong exothermic Ca2+ binding (Ka = 107 M-1) while EF1 shows a weaker binding (Ka = 105 M-1), resulting in the burial of its negatively charged residues. The Ca2+ binding to EFD results in a stable structure with a melting temperature shifting from 67 to 99 °C and induces a structural transition from a dimeric to monomeric form. EF2 appears to play a role in dimer formation in its apo form, while the hydrophobic exposure of Ca2+-bound-EF1 is crucial for dimer formation in its holo form. The result is consistent with structures obtained from Cryo-EM, indicating that a stable structure of EFD with hydrophobic patches upon Ca2+ binding is vital for its Duox's domain-domain interaction for electron transfer.
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Affiliation(s)
- Chin-Chuan Wei
- Department of Chemistry, College of Arts and Sciences, Southern Illinois University Edwardsville, Edwardsville, IL 62026, USA; Department of Pharmaceutical Sciences, College of Pharmacy, Southern Illinois University Edwardsville, Edwardsville, IL 62026, USA.
| | - Amena Abdul Razzak
- Department of Chemistry, College of Arts and Sciences, Southern Illinois University Edwardsville, Edwardsville, IL 62026, USA
| | - Hadis Ghasemi
- Department of Chemistry, College of Arts and Sciences, Southern Illinois University Edwardsville, Edwardsville, IL 62026, USA
| | - Rahil Khedri
- Department of Chemistry, College of Arts and Sciences, Southern Illinois University Edwardsville, Edwardsville, IL 62026, USA
| | - Alexandria Fraase
- Department of Chemistry, College of Arts and Sciences, Southern Illinois University Edwardsville, Edwardsville, IL 62026, USA
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2
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Fiadeiro MB, Diogo JC, Silva AA, Kim YS, Cristovao AC. NADPH Oxidases in Neurodegenerative Disorders: Mechanisms and Therapeutic Opportunities. Antioxid Redox Signal 2024. [PMID: 38760935 DOI: 10.1089/ars.2023.0002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/20/2024]
Abstract
SIGNIFICANCE The NADPH oxidase (NOX) enzyme family, located in the central nervous system (CNS), is recognized as a source of reactive oxygen species (ROS) in the brain. Despite its importance in cellular processes, excessive ROS generation leads to cell death and is involved in the pathogenesis of neurodegenerative disorders. RECENT ADVANCES NOX enzymes contribute to the development of neurodegenerative diseases, such as Parkinson's disease (PD), Alzheimer's disease (AD), amyotrophic lateral sclerosis (ALS), and stroke, highlighting their potential as targets for future therapeutic development. This review will discuss NOX's contribution and therapeutic targeting potential in neurodegenerative diseases, focusing on PD, AD, ALS, and Stroke. CRITICAL ISSUES Homeostatic and physiological levels of ROS are crucial for regulating several processes, such as development, memory, neuronal signaling, and vascular homeostasis. However, NOX-mediated excessive ROS generation is deeply involved in the damage of DNA, proteins, and lipids, leading to cell death in the pathogenesis of a wide range of diseases, namely neurodegenerative diseases. FUTURE DIRECTIONS It is essential to understand the role of NOX homologs in neurodegenerative disorders and the pathological mechanisms undergoing neurodegeneration mediated by increased levels of ROS. This further knowledge will allow the development of new specific NOX inhibitors and their application for neurodegenerative disease therapeutics.
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Affiliation(s)
- Mariana Bernardo Fiadeiro
- University of Beira Interior, CICS-UBI Health Sciences Research Center, Covilha, Castelo Branco, Portugal
- NeuroSoV, Covilhã, Portugal;
| | - João Campos Diogo
- University of Beira Interior, CICS-UBI Health Sciences Research Center, Covilha, Castelo Branco, Portugal
- NeuroSoV, Covilhã, Portugal;
| | - Ana Alexandra Silva
- University of Beira Interior, CICS-UBI Health Sciences Research Center, Covilha, Castelo Branco, Portugal
- NeuroSoV, Covilhã, Portugal;
| | - Yoon-Seong Kim
- Rutgers Robert Wood Johnson Medical School, RWJMS Institute for Neurological Therapeutics, Piscataway, New Jersey, United States;
| | - Ana Clara Cristovao
- University of Beira Interior, CICS-UBI Health Sciences Research Center, Covilha, Castelo Branco, Portugal
- NeuroSoV, Covilhã, Portugal;
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3
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Cui C, Jiang M, Jain N, Das S, Lo YH, Kermani AA, Pipatpolkai T, Sun J. Structural basis of human NOX5 activation. Nat Commun 2024; 15:3994. [PMID: 38734761 PMCID: PMC11088703 DOI: 10.1038/s41467-024-48467-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 05/02/2024] [Indexed: 05/13/2024] Open
Abstract
NADPH oxidase 5 (NOX5) catalyzes the production of superoxide free radicals and regulates physiological processes from sperm motility to cardiac rhythm. Overexpression of NOX5 leads to cancers, diabetes, and cardiovascular diseases. NOX5 is activated by intracellular calcium signaling, but the underlying molecular mechanism of which - in particular, how calcium triggers electron transfer from NADPH to FAD - is still unclear. Here we capture motions of full-length human NOX5 upon calcium binding using single-particle cryogenic electron microscopy (cryo-EM). By combining biochemistry, mutagenesis analyses, and molecular dynamics (MD) simulations, we decode the molecular basis of NOX5 activation and electron transfer. We find that calcium binding to the EF-hand domain increases NADPH dynamics, permitting electron transfer between NADPH and FAD and superoxide production. Our structural findings also uncover a zinc-binding motif that is important for NOX5 stability and enzymatic activity, revealing modulation mechanisms of reactive oxygen species (ROS) production.
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Affiliation(s)
- Chenxi Cui
- Department of Structural Biology, St Jude Children's Research Hospital, Memphis, TN38105, USA
| | - Meiqin Jiang
- Department of Structural Biology, St Jude Children's Research Hospital, Memphis, TN38105, USA
| | - Nikhil Jain
- Department of Structural Biology, St Jude Children's Research Hospital, Memphis, TN38105, USA
| | - Sourav Das
- Department of Chemical Biology & Therapeutics, St Jude Children's Research Hospital, Memphis, TN38105, USA
| | - Yu-Hua Lo
- Department of Structural Biology, St Jude Children's Research Hospital, Memphis, TN38105, USA
| | - Ali A Kermani
- Department of Structural Biology, St Jude Children's Research Hospital, Memphis, TN38105, USA
| | - Tanadet Pipatpolkai
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 673371, Singapore, Singapore.
| | - Ji Sun
- Department of Structural Biology, St Jude Children's Research Hospital, Memphis, TN38105, USA.
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4
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Miyano K, Kajikawa M. Ca 2+ -binding-region-dependent cell surface localization of NADPH oxidase Nox5. FEBS Lett 2023; 597:702-713. [PMID: 36653838 DOI: 10.1002/1873-3468.14577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 12/29/2022] [Accepted: 01/08/2023] [Indexed: 01/20/2023]
Abstract
Six gene splice variants of superoxide-generating NADPH oxidase 5 (Nox5) have been identified in humans, and they differ in the sequence of their N-terminal cytoplasmic domains, which comprise four EF-hand motifs. Here, we demonstrated that the Ca2+ -dependent association and dissociation between the N- and C-terminal cytoplasmic domains of the Nox5β variant are affected by the alanine substitution of the conserved Ile-113 or Leu-115 at the connecting loop between the third and fourth EF-hand motifs. These substitutions impair the cell surface localization of Nox5β. In addition, the Nox5ε/S variant, lacking all EF-hand motifs, does not localize to the plasma membrane. Thus, the Ca2+ -sensitive intramolecular interaction determines the Nox5 subcellular localization, that is, whether Nox5 variants generate superoxide in the extracellular or intracellular space.
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Affiliation(s)
- Kei Miyano
- Department of Natural Sciences, Kawasaki Medical School, Okayama, Japan
- Department of Biochemistry, Kawasaki Medical School, Okayama, Japan
| | - Mizuho Kajikawa
- Laboratory of Microbiology, Showa Pharmaceutical University, Tokyo, Japan
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5
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Calmodulin binding to the dehydrogenase domain of NADPH oxidase 5 alters its oligomeric state. Biochem Biophys Rep 2022; 29:101198. [PMID: 35079639 PMCID: PMC8777244 DOI: 10.1016/j.bbrep.2021.101198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/29/2021] [Accepted: 12/29/2021] [Indexed: 11/20/2022] Open
Abstract
Superoxide generated by NADPH Oxidase 5 (Nox5) is regulated by Ca2+ through the interaction of its self-contained Ca2+ binding domain and dehydrogenase domain (DH). Recently, calmodulin (CaM) has been reported to enhance the Ca2+ sensitivity of Nox5 by binding to the CaM-binding domain sequence (CMBD), in which the interaction between CaM and Nox5 is largely unclear. Here, we used the CMBD peptide and truncated DH constructs, and separately studied their interaction with CaM by fluorescence, calorimetry, and dynamic light scattering. Our results revealed that each half-domain of CaM binds one CMBD peptide with a binding constant near 106 M-1 and a binding enthalpy change of −3.81 kcal/mol, consistent with an extended 1:2 CaM:CMBD structure. However, the recombinant truncated DH proteins exist as oligomers, possibly trimer and tetramer. The oligomeric states are concentration and salt dependent. CaM binding appears to stabilize the DH dimer complexed with CaM. The thermodynamics of CaM binding to the DH is comparable to the peptide-based study except that the near unity binding stoichiometry and a large conformational change were observed. Our result suggests that the oligomeric states of Nox5, mediated by its DH domain and CaM, may be important for its superoxide-generating activity. Calmodulin (CaM) binds two peptides corresponding to the CaM-binding domain (CMBD) in Nox5. Solution characterization suggests that the CMBD-bound Ca2+-CaM is in the extended form. The truncated dehydrogenase domains (DHs) were expressed as trimer and tetramer. The CaM binding to Nox5's DH kinetically stabilizes the dimer formation with unity stoichiometry.
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6
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Taylor JP, Tse HM. The role of NADPH oxidases in infectious and inflammatory diseases. Redox Biol 2021; 48:102159. [PMID: 34627721 PMCID: PMC8487856 DOI: 10.1016/j.redox.2021.102159] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 09/30/2021] [Accepted: 09/30/2021] [Indexed: 02/06/2023] Open
Abstract
Nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (NOX) are enzymes that generate superoxide or hydrogen peroxide from molecular oxygen utilizing NADPH as an electron donor. There are seven enzymes in the NOX family: NOX1-5 and dual oxidase (DUOX) 1-2. NOX enzymes in humans play important roles in diverse biological functions and vary in expression from tissue to tissue. Importantly, NOX2 is involved in regulating many aspects of innate and adaptive immunity, including regulation of type I interferons, the inflammasome, phagocytosis, antigen processing and presentation, and cell signaling. DUOX1 and DUOX2 play important roles in innate immune defenses at epithelial barriers. This review discusses the role of NOX enzymes in normal physiological processes as well as in disease. NOX enzymes are important in autoimmune diseases like type 1 diabetes and have also been implicated in acute lung injury caused by infection with SARS-CoV-2. Targeting NOX enzymes directly or through scavenging free radicals may be useful therapies for autoimmunity and acute lung injury where oxidative stress contributes to pathology.
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Affiliation(s)
- Jared P Taylor
- Department of Microbiology, Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Hubert M Tse
- Department of Microbiology, Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, AL, USA.
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7
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Vermot A, Petit-Härtlein I, Smith SME, Fieschi F. NADPH Oxidases (NOX): An Overview from Discovery, Molecular Mechanisms to Physiology and Pathology. Antioxidants (Basel) 2021; 10:890. [PMID: 34205998 PMCID: PMC8228183 DOI: 10.3390/antiox10060890] [Citation(s) in RCA: 223] [Impact Index Per Article: 74.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/21/2021] [Accepted: 05/26/2021] [Indexed: 01/17/2023] Open
Abstract
The reactive oxygen species (ROS)-producing enzyme NADPH oxidase (NOX) was first identified in the membrane of phagocytic cells. For many years, its only known role was in immune defense, where its ROS production leads to the destruction of pathogens by the immune cells. NOX from phagocytes catalyzes, via one-electron trans-membrane transfer to molecular oxygen, the production of the superoxide anion. Over the years, six human homologs of the catalytic subunit of the phagocyte NADPH oxidase were found: NOX1, NOX3, NOX4, NOX5, DUOX1, and DUOX2. Together with the NOX2/gp91phox component present in the phagocyte NADPH oxidase assembly itself, the homologs are now referred to as the NOX family of NADPH oxidases. NOX are complex multidomain proteins with varying requirements for assembly with combinations of other proteins for activity. The recent structural insights acquired on both prokaryotic and eukaryotic NOX open new perspectives for the understanding of the molecular mechanisms inherent to NOX regulation and ROS production (superoxide or hydrogen peroxide). This new structural information will certainly inform new investigations of human disease. As specialized ROS producers, NOX enzymes participate in numerous crucial physiological processes, including host defense, the post-translational processing of proteins, cellular signaling, regulation of gene expression, and cell differentiation. These diversities of physiological context will be discussed in this review. We also discuss NOX misregulation, which can contribute to a wide range of severe pathologies, such as atherosclerosis, hypertension, diabetic nephropathy, lung fibrosis, cancer, or neurodegenerative diseases, giving this family of membrane proteins a strong therapeutic interest.
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Affiliation(s)
- Annelise Vermot
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, 38000 Grenoble, France; (A.V.); (I.P.-H.)
| | - Isabelle Petit-Härtlein
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, 38000 Grenoble, France; (A.V.); (I.P.-H.)
| | - Susan M. E. Smith
- Department of Molecular and Cellular Biology, Kennesaw State University, Kennesaw, GA 30144, USA;
| | - Franck Fieschi
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, 38000 Grenoble, France; (A.V.); (I.P.-H.)
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8
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Sweeny EA, Schlanger S, Stuehr DJ. Dynamic regulation of NADPH oxidase 5 by intracellular heme levels and cellular chaperones. Redox Biol 2020; 36:101656. [PMID: 32738790 PMCID: PMC7394750 DOI: 10.1016/j.redox.2020.101656] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 07/13/2020] [Accepted: 07/21/2020] [Indexed: 12/15/2022] Open
Abstract
NADPH oxidase 5 (NOX5) is a transmembrane signaling enzyme that produces superoxide in response to elevated cytosolic calcium. In addition to its association with numerous human diseases, NOX5 has recently been discovered to play crucial roles in the immune response and cardiovascular system. Details of NOX5 maturation, and specifically its response to changes in intracellular heme levels have remained unclear. Here we establish an experimental system in mammalian cells that allows us to probe the influence of heme availability on ROS production by NOX5. We identified a mode of dynamic regulatory control over NOX5 activity through modulation of its heme saturation and oligomeric state by intracellular heme levels and Hsp90 binding. This regulatory mechanism allows for fine-tuning and reversible modulation of NOX5 activity in response to stimuli.
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Affiliation(s)
- Elizabeth A Sweeny
- Department of Inflammation and Immunity, Lerner Research Institute, The Cleveland Clinic, Cleveland, OH, 44195, USA.
| | - Simon Schlanger
- Department of Inflammation and Immunity, Lerner Research Institute, The Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Dennis J Stuehr
- Department of Inflammation and Immunity, Lerner Research Institute, The Cleveland Clinic, Cleveland, OH, 44195, USA.
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9
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Li QY, Li P, Myint Phyu Sin Htwe N, Shangguan KK, Liang Y. Antepenultimate residue at the C-terminus of NADPH oxidase RBOHD is critical for its function in the production of reactive oxygen species in Arabidopsis. J Zhejiang Univ Sci B 2020; 20:713-727. [PMID: 31379142 PMCID: PMC6700349 DOI: 10.1631/jzus.b1900105] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 05/12/2019] [Indexed: 12/14/2022]
Abstract
Production of reactive oxygen species (ROS) is a conserved immune response primarily mediated by NADPH oxidases (NOXs), also known in plants as respiratory burst oxidase homologs (RBOHs). Most microbe-associated molecular patterns (MAMPs) trigger a very fast and transient ROS burst in plants. However, recently, we found that lipopolysaccharides (LPS), a typical bacterial MAMP, triggered a biphasic ROS burst. In this study, we isolated mutants defective in LPS-triggered biphasic ROS burst (delt) in Arabidopsis, and cloned the DELT1 gene that was shown to encode RBOHD. In the delt1-2 allele, the antepenultimate residue, glutamic acid (E919), at the C-terminus of RBOHD was mutated to lysine (K). E919 is a highly conserved residue in NADPH oxidases, and a mutation of the corresponding residue E568 in human NOX2 has been reported to be one of the causes of chronic granulomatous disease. Consistently, we found that residue E919 was indispensable for RBOHD function in the MAMP-induced ROS burst and stomatal closure. It has been suggested that the mutation of this residue in other NADPH oxidases impairs the protein's stability and complex assembly. However, we found that the E919K mutation did not affect RBOHD protein abundance or the ability of protein association, suggesting that the residue E919 in RBOHD might have a regulatory mechanism different from that of other NOXs. Taken together, our results confirm that the antepenultimate residue E is critical for NADPH oxidases and provide a new insight into the regulatory mechanisms of RBOHD.
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10
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Vatannejad A, Tavilani H, Sadeghi MR, Karimi M, Lakpour N, Amanpour S, Shabani Nashtaei M, Doosti M. Evaluation of the NOX5 protein expression and oxidative stress in sperm from asthenozoospermic men compared to normozoospermic men. J Endocrinol Invest 2019; 42:1181-1189. [PMID: 30963466 DOI: 10.1007/s40618-019-01035-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 03/19/2019] [Indexed: 02/07/2023]
Abstract
PURPOSE NADPH oxidase 5 (NOX5), the main isoform of NOX in spermatozoa, has been recognized as the main active generators of reactive oxygen species (ROS), including superoxide anion (O 2 -. ) and hydrogen peroxide (H2O2). ROS have been shown to play important roles in many physiological and pathological conditions in spermatozoa. The present study aims to investigate the alterations of NOX5 protein expression and oxidative stress (OS) status in asthenozoospermic men compared to normozoospermic men. METHODS Semen samples were collected from 25 asthenozoospermic men and 28 normozoospermic men. In this study, NOX5 protein expression was evaluated by Western blotting. An OS status was evaluated by measuring of ROS (O 2 -. and H2O2), DNA damage and plasma membrane integrity in spermatozoa. RESULTS The protein expression of NOX5 (p < 0.0001) was remarkably higher in asthenozoospermic men in comparison to normozoospermic men. In addition, the percentages of intracellular O 2 -. (p < 0.0001), H2O2 (p < 0.0001) in viable spermatozoa, apoptotic sperm cells with altered plasma membrane (p < 0.001) and DNA damage (p = 0.001) were significantly increased in asthenozoospermic men compared to normozoospermic men. CONCLUSIONS The present study provides evidence that the overexpression of NOX5 protein may induce excessive ROS production and oxidative stress damages to DNA and plasma membrane integrity in asthenozoospermic men.
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Affiliation(s)
- A Vatannejad
- Department of Comparative Biosciences, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
- Student's Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - H Tavilani
- Urology and Nephrology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - M R Sadeghi
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - M Karimi
- Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - N Lakpour
- Reproductive Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
- Department of Pathology, Faculty of Medicine, Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - S Amanpour
- Cancer Biology Research Centre, Tehran University of Medical Sciences, Tehran, Iran
| | - M Shabani Nashtaei
- Department of Infertility, Shariati Hospital, Tehran University of Medical Sciences Faculty of Medicine, Tehran, Iran
| | - M Doosti
- Department of Clinical Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
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11
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Touyz RM, Anagnostopoulou A, Rios F, Montezano AC, Camargo LL. NOX5: Molecular biology and pathophysiology. Exp Physiol 2019; 104:605-616. [PMID: 30801870 PMCID: PMC6519284 DOI: 10.1113/ep086204] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 02/20/2019] [Indexed: 12/12/2022]
Abstract
NEW FINDINGS What is the topic of this review? This review provides a comprehensive overview of Nox5 from basic biology to human disease and highlights unique features of this Nox isoform What advances does it highlight? Major advances in Nox5 biology relate to crystallization of the molecule and new insights into the pathophysiological role of Nox5. Recent discoveries have unravelled the crystal structure of Nox5, the first Nox isoform to be crystalized. This provides new opportunities to develop drugs or small molecules targeted to Nox5 in an isoform-specific manner, possibly for therapeutic use. Moreover genome wide association studies (GWAS) identified Nox5 as a new blood pressure-associated gene and studies in mice expressing human Nox5 in a cell-specific manner have provided new information about the (patho) physiological role of Nox5 in the cardiovascular system and kidneys. Nox5 seems to be important in the regulation of vascular contraction and kidney function. In cardiovascular disease and diabetic nephropathy, Nox5 activity is increased and this is associated with increased production of reactive oxygen species and oxidative stress implicated in tissue damage. ABSTRACT Nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (Nox), comprise seven family members (Nox1-Nox5 and dual oxidase 1 and 2) and are major producers of reactive oxygen species in mammalian cells. Reactive oxygen species are crucially involved in cell signalling and function. All Noxs share structural homology comprising six transmembrane domains with two haem-binding regions and an NADPH-binding region on the intracellular C-terminus, whereas their regulatory systems, mechanisms of activation and tissue distribution differ. This explains the diverse function of Noxs. Of the Noxs, NOX5 is unique in that rodents lack the gene, it is regulated by Ca2+ , it does not require NADPH oxidase subunits for its activation, and it is not glycosylated. NOX5 localizes in the perinuclear and endoplasmic reticulum regions of cells and traffics to the cell membrane upon activation. It is tightly regulated through numerous post-translational modifications and is activated by vasoactive agents, growth factors and pro-inflammatory cytokines. The exact pathophysiological significance of NOX5 remains unclear, but it seems to be important in the physiological regulation of sperm motility, vascular contraction and lymphocyte differentiation, and NOX5 hyperactivation has been implicated in cardiovascular disease, kidney injury and cancer. The field of NOX5 biology is still in its infancy, but with new insights into its biochemistry and cellular regulation, discovery of the NOX5 crystal structure and genome-wide association studies implicating NOX5 in disease, the time is now ripe to advance NOX5 research. This review provides a comprehensive overview of our current understanding of NOX5, from basic biology to human disease, and highlights the unique characteristics of this enigmatic Nox isoform.
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Affiliation(s)
- Rhian M. Touyz
- Institute of Cardiovascular and Medical SciencesBHF Glasgow Cardiovascular CentreUniversity of GlasgowGlasgowUK
| | - Aikaterini Anagnostopoulou
- Institute of Cardiovascular and Medical SciencesBHF Glasgow Cardiovascular CentreUniversity of GlasgowGlasgowUK
| | - Francisco Rios
- Institute of Cardiovascular and Medical SciencesBHF Glasgow Cardiovascular CentreUniversity of GlasgowGlasgowUK
| | - Augusto C. Montezano
- Institute of Cardiovascular and Medical SciencesBHF Glasgow Cardiovascular CentreUniversity of GlasgowGlasgowUK
| | - Livia L. Camargo
- Institute of Cardiovascular and Medical SciencesBHF Glasgow Cardiovascular CentreUniversity of GlasgowGlasgowUK
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12
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Abstract
NOX (NADPH oxidases) are a family of NADPH-dependent transmembrane enzymes that synthesize superoxide and other reactive oxygen species. There are seven isoforms (NOX1-5 and DUOX1-2) which derive from a common ancestral NOX. NOX enzymes are distinguished by different modes of activation, the types of ROS that are produced, the cell types where they are expressed, and distinct functional roles. NOX5 was one of the earliest eukaryotic Nox enzymes to evolve and ironically the last isoform to be discovered in humans. In the time since its discovery, our knowledge of the regulation of NOX5 has expanded tremendously, and we now have a more comprehensive understanding of the molecular mechanisms underlying NOX5-dependent ROS production. In contrast, the cell types where NOX5 is robustly expressed and its functional significance in health and disease remain an underdeveloped area. The goal of this chapter is to provide an up-to-date overview of the mechanisms regulating NOX5 function and its importance in human physiology and pathophysiology.
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Affiliation(s)
- David J R Fulton
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA.
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13
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Andueza A, Garde N, García-Garzón A, Ansorena E, López-Zabalza MJ, Iraburu MJ, Zalba G, Martínez-Irujo JJ. NADPH oxidase 5 promotes proliferation and fibrosis in human hepatic stellate cells. Free Radic Biol Med 2018; 126:15-26. [PMID: 30036633 DOI: 10.1016/j.freeradbiomed.2018.07.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 07/05/2018] [Accepted: 07/20/2018] [Indexed: 12/13/2022]
Abstract
NADPH oxidase (Nox) variants Nox1, Nox2 and Nox4 are implicated in the progression of liver fibrosis. However, the role of Nox5 is not yet known, mainly due to the lack of this enzyme in rat and mouse genomes. Here we describe the expression and functional relevance of Nox5 in the human cell line of hepatic stellate cells (HSC) LX-2. Under basal conditions, three long (Nox5-L: Nox5α, -β, and -δ) and a short (Nox5-S or Nox5ε) splice variants were detected, which were silenced with specific siRNAs for Nox5. The most abundant isoform was Nox5-S, accounting for more than 90% of Nox5 protein. Overexpression of Nox5β generated reactive oxygen species (ROS) in the presence of calcium, as judged by the production of hydrogen peroxide, L-012 luminescence and cytochrome c reduction. Nox5ε did not generated ROS under these conditions, and a reduced ROS production was observed when co-expressed with Nox5β. In contrast, dihydroethidium oxidation was increased by Nox5β or Nox5ε, suggesting that Nox5ε induced intracellular oxidative stress by an unknown mechanism. Functional studies showed that both Nox5β and Nox5ε stimulated the proliferation of LX-2 cells and the collagen type I levels, while Nox5 siRNAs inhibited these effects. Interestingly, TGF-β and angiotensin II upregulated Nox5 expression, which was reduced in cells pre-incubated with catalase. Further studies silencing Nox5 in TGF-β-treated cells resulted in a reduction of collagen levels via p38 MAPK. Collectively, these results show for the first time that Nox5 can play a relevant role in the proliferation and fibrosis on human HSC.
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Affiliation(s)
- Aitor Andueza
- Department of Biochemistry and Genetics, University of Navarra, Pamplona, Spain
| | - Naiara Garde
- Department of Biochemistry and Genetics, University of Navarra, Pamplona, Spain
| | | | - Eduardo Ansorena
- Department of Biochemistry and Genetics, University of Navarra, Pamplona, Spain; IdiSNA, Navarra Institute for Health Research, Spain
| | | | - María J Iraburu
- Department of Biochemistry and Genetics, University of Navarra, Pamplona, Spain
| | - Guillermo Zalba
- Department of Biochemistry and Genetics, University of Navarra, Pamplona, Spain; IdiSNA, Navarra Institute for Health Research, Spain
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14
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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:JAHA.118.009388. [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [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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15
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Antony S, Jiang G, Wu Y, Meitzler JL, Makhlouf HR, Haines DC, Butcher D, Hoon DS, Ji J, Zhang Y, Juhasz A, Lu J, Liu H, Dahan I, Konate M, Roy KK, Doroshow JH. NADPH oxidase 5 (NOX5)-induced reactive oxygen signaling modulates normoxic HIF-1α and p27 Kip1 expression in malignant melanoma and other human tumors. Mol Carcinog 2017; 56:2643-2662. [PMID: 28762556 PMCID: PMC5675809 DOI: 10.1002/mc.22708] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 07/19/2017] [Accepted: 07/28/2017] [Indexed: 12/14/2022]
Abstract
NADPH oxidase 5 (NOX5) generated reactive oxygen species (ROS) have been implicated in signaling cascades that regulate cancer cell proliferation. To evaluate and validate NOX5 expression in human tumors, we screened a broad range of tissue microarrays (TMAs), and report substantial overexpression of NOX5 in malignant melanoma and cancers of the prostate, breast, and ovary. In human UACC-257 melanoma cells that possesses high levels of functional endogenous NOX5, overexpression of NOX5 resulted in enhanced cell growth, increased numbers of BrdU positive cells, and increased γ-H2AX levels. Additionally, NOX5-overexpressing (stable and inducible) UACC-257 cells demonstrated increased normoxic HIF-1α expression and decreased p27Kip1 expression. Similarly, increased normoxic HIF-1α expression and decreased p27Kip1 expression were observed in stable NOX5-overexpressing clones of KARPAS 299 human lymphoma cells and in the human prostate cancer cell line, PC-3. Conversely, knockdown of endogenous NOX5 in UACC-257 cells resulted in decreased cell growth, decreased HIF-1α expression, and increased p27Kip1 expression. Likewise, in an additional human melanoma cell line, WM852, and in PC-3 cells, transient knockdown of endogenous NOX5 resulted in increased p27Kip1 and decreased HIF-1α expression. Knockdown of endogenous NOX5 in UACC-257 cells resulted in decreased Akt and GSK3β phosphorylation, signaling pathways known to modulate p27Kip1 levels. In summary, our findings suggest that NOX5 expression in human UACC-257 melanoma cells could contribute to cell proliferation due, in part, to the generation of high local concentrations of extracellular ROS that modulate multiple pathways that regulate HIF-1α and networks that signal through Akt/GSK3β/p27Kip1 .
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Affiliation(s)
- Smitha Antony
- Division of Cancer Treatment and DiagnosisNational Cancer InstituteBethesdaMaryland
| | - Guojian Jiang
- Developmental Therapeutics Branch, Center for Cancer ResearchNational Cancer InstituteBethesdaMaryland
| | - Yongzhong Wu
- Developmental Therapeutics Branch, Center for Cancer ResearchNational Cancer InstituteBethesdaMaryland
| | - Jennifer L. Meitzler
- Developmental Therapeutics Branch, Center for Cancer ResearchNational Cancer InstituteBethesdaMaryland
| | - Hala R. Makhlouf
- Division of Cancer Treatment and DiagnosisNational Cancer InstituteBethesdaMaryland
| | - Diana C. Haines
- Pathology/Histotechnology Laboratory, Leidos Inc./Frederick National Laboratory for Cancer ResearchNational Cancer InstituteFrederickMaryland
| | - Donna Butcher
- Pathology/Histotechnology Laboratory, Leidos Inc./Frederick National Laboratory for Cancer ResearchNational Cancer InstituteFrederickMaryland
| | - Dave S. Hoon
- Department of Molecular OncologyJohn Wayne Cancer InstituteSanta MonicaCalifornia
| | - Jiuping Ji
- Division of Cancer Treatment and DiagnosisNational Cancer InstituteBethesdaMaryland
| | - Yiping Zhang
- Division of Cancer Treatment and DiagnosisNational Cancer InstituteBethesdaMaryland
| | - Agnes Juhasz
- Developmental Therapeutics Branch, Center for Cancer ResearchNational Cancer InstituteBethesdaMaryland
| | - Jiamo Lu
- Developmental Therapeutics Branch, Center for Cancer ResearchNational Cancer InstituteBethesdaMaryland
| | - Han Liu
- Division of Cancer Treatment and DiagnosisNational Cancer InstituteBethesdaMaryland
| | - Iris Dahan
- Division of Cancer Treatment and DiagnosisNational Cancer InstituteBethesdaMaryland
| | - Mariam Konate
- Division of Cancer Treatment and DiagnosisNational Cancer InstituteBethesdaMaryland
| | - Krishnendu K. Roy
- Division of Cancer Treatment and DiagnosisNational Cancer InstituteBethesdaMaryland
| | - James H. Doroshow
- Division of Cancer Treatment and DiagnosisNational Cancer InstituteBethesdaMaryland
- Developmental Therapeutics Branch, Center for Cancer ResearchNational Cancer InstituteBethesdaMaryland
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16
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Schröder K, Weissmann N, Brandes RP. Organizers and activators: Cytosolic Nox proteins impacting on vascular function. Free Radic Biol Med 2017; 109:22-32. [PMID: 28336130 DOI: 10.1016/j.freeradbiomed.2017.03.017] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 02/24/2017] [Accepted: 03/14/2017] [Indexed: 01/25/2023]
Abstract
NADPH oxidases of the Nox family are important enzymatic sources of reactive oxygen species (ROS) in the cardiovascular system. Of the 7 members of the Nox family, at least three depend for their activation on specific cytosolic proteins. These are p47phox and its homologue NoxO1 and p67phox and its homologue NoxA1. Also the Rho-GTPase Rac is important but as this protein has many additional functions, it will not be covered here. The Nox1 enzyme is preferentially activated by the combination of NoxO1 with NoxA1, whereas Nox2 gains highest activity with p47phox together with p67phox. As p47phox, different to NoxO1 contains an auto inhibitory region it has to be phosphorylated prior to complex formation. In the cardio-vascular system, all cytosolic Nox proteins are expressed but the evidence for their contribution to ROS production is not well established. Most data have been collected for p47phox, whereas NoxA1 has basically not yet been studied. In this article the specific aspects of cytosolic Nox proteins in the cardiovascular system with respect to Nox activation, their expression and their importance will be reviewed. Finally, it will be discussed whether cytosolic Nox proteins are suitable pharmacological targets to tamper with vascular ROS production.
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Affiliation(s)
- Katrin Schröder
- Institut für Kardiovaskuläre Physiologie, Goethe-Universität Frankfurt, Frankfurt, Germany.
| | - Norbert Weissmann
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Ralf P Brandes
- Institut für Kardiovaskuläre Physiologie, Goethe-Universität Frankfurt, Frankfurt, Germany
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17
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Ma MW, Wang J, Zhang Q, Wang R, Dhandapani KM, Vadlamudi RK, Brann DW. NADPH oxidase in brain injury and neurodegenerative disorders. Mol Neurodegener 2017; 12:7. [PMID: 28095923 PMCID: PMC5240251 DOI: 10.1186/s13024-017-0150-7] [Citation(s) in RCA: 285] [Impact Index Per Article: 40.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 01/05/2017] [Indexed: 12/11/2022] Open
Abstract
Oxidative stress is a common denominator in the pathology of neurodegenerative disorders such as Alzheimer’s disease, Parkinson’s disease, Huntington’s disease, amyotrophic lateral sclerosis, and multiple sclerosis, as well as in ischemic and traumatic brain injury. The brain is highly vulnerable to oxidative damage due to its high metabolic demand. However, therapies attempting to scavenge free radicals have shown little success. By shifting the focus to inhibit the generation of damaging free radicals, recent studies have identified NADPH oxidase as a major contributor to disease pathology. NADPH oxidase has the primary function to generate free radicals. In particular, there is growing evidence that the isoforms NOX1, NOX2, and NOX4 can be upregulated by a variety of neurodegenerative factors. The majority of recent studies have shown that genetic and pharmacological inhibition of NADPH oxidase enzymes are neuroprotective and able to reduce detrimental aspects of pathology following ischemic and traumatic brain injury, as well as in chronic neurodegenerative disorders. This review aims to summarize evidence supporting the role of NADPH oxidase in the pathology of these neurological disorders, explores pharmacological strategies of targeting this major oxidative stress pathway, and outlines obstacles that need to be overcome for successful translation of these therapies to the clinic.
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Affiliation(s)
- Merry W Ma
- Charlie Norwood VA Medical Center, One Freedom Way, Augusta, GA, 30904, USA.,Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, 1120 Fifteenth Street, Augusta, GA, 30912, USA
| | - Jing Wang
- Charlie Norwood VA Medical Center, One Freedom Way, Augusta, GA, 30904, USA.,Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, 1120 Fifteenth Street, Augusta, GA, 30912, USA
| | - Quanguang Zhang
- Charlie Norwood VA Medical Center, One Freedom Way, Augusta, GA, 30904, USA.,Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, 1120 Fifteenth Street, Augusta, GA, 30912, USA
| | - Ruimin Wang
- Charlie Norwood VA Medical Center, One Freedom Way, Augusta, GA, 30904, USA.,Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, 1120 Fifteenth Street, Augusta, GA, 30912, USA
| | - Krishnan M Dhandapani
- Charlie Norwood VA Medical Center, One Freedom Way, Augusta, GA, 30904, USA.,Department of Neurosurgery, Medical College of Georgia, Augusta University, 1120 Fifteenth Street, Augusta, GA, 30912, USA
| | - Ratna K Vadlamudi
- Department of Obstetrics and Gynecology, University of Texas Health Science Center, 7703 Medical Drive, San Antonio, TX, 78229, USA
| | - Darrell W Brann
- Charlie Norwood VA Medical Center, One Freedom Way, Augusta, GA, 30904, USA. .,Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, 1120 Fifteenth Street, Augusta, GA, 30912, USA.
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18
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CRISPR/Cas9-mediated knockout of p22phox leads to loss of Nox1 and Nox4, but not Nox5 activity. Redox Biol 2016; 9:287-295. [PMID: 27614387 PMCID: PMC5021817 DOI: 10.1016/j.redox.2016.08.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 08/16/2016] [Indexed: 11/22/2022] Open
Abstract
The NADPH oxidases are important transmembrane proteins producing reactive oxygen species (ROS). Within the Nox family, different modes of activation can be discriminated. Nox1-3 are dependent on different cytosolic subunits, Nox4 seems to be constitutively active and Nox5 is directly activated by calcium. With the exception of Nox5, all Nox family members are thought to depend on the small transmembrane protein p22phox. With the discovery of the CRISPR/Cas9-system, a tool to alter genomic DNA sequences has become available. So far, this method has not been widely used in the redox community. On such basis, we decided to study the requirement of p22phox in the Nox complex using CRISPR/Cas9-mediated knockout. Knockout of the gene of p22phox, CYBA, led to an ablation of activity of Nox4 and Nox1 but not of Nox5. Production of hydrogen peroxide or superoxide after knockout could be rescued with either human or rat p22phox, but not with the DUOX-maturation factors DUOXA1/A2. Furthermore, different mutations of p22phox were studied regarding the influence on Nox4-dependent H2O2 production. P22phox Q130* and Y121H affected maturation and activity of Nox4. Hence, Nox5-dependent O2•- production is independent of p22phox, but native p22phox is needed for maturation of Nox4 and production of H2O2.
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19
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Petrushanko IY, Lobachev VM, Kononikhin AS, Makarov AA, Devred F, Kovacic H, Kubatiev AA, Tsvetkov PO. Oxidation of Са2+-Binding Domain of NADPH Oxidase 5 (NOX5): Toward Understanding the Mechanism of Inactivation of NOX5 by ROS. PLoS One 2016; 11:e0158726. [PMID: 27391469 PMCID: PMC4938588 DOI: 10.1371/journal.pone.0158726] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 06/21/2016] [Indexed: 11/18/2022] Open
Abstract
NOX5 protein, one of the most active generators of reactive oxygen species (ROS), plays an important role in many processes, including regulation of cell growth, death and differentiation. Because of its central role in ROS generation, it needs to be tightly regulated to guarantee cellular homeostasis. Contrary to other members of NADPH-oxidases family, NOX5 has its own regulatory calcium-binding domain and thus could be activated directly by calcium ions. While several mechanisms of activation have been described, very little is known about the mechanisms that could prevent the overproduction of ROS by NOX5. In the present study using calorimetric methods and circular dichroism we found that oxidation of cysteine and methionine residues of NOX5 decreases binding of Ca2+ ions and perturbs both secondary and tertiary structure of protein. Our data strongly suggest that oxidation of calcium-binding domain of NOX5 could be implicated in its inactivation, serving as a possible defense mechanism against oxidative stress.
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Affiliation(s)
- Irina Yu Petrushanko
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Street 32, 119991 Moscow, Russia
| | - Vladimir M. Lobachev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Street 32, 119991 Moscow, Russia
| | - Alexey S. Kononikhin
- Moscow Institute of Physics and Technology, 141700 Dolgoprudnyi, Moscow Region, Russia
| | - Alexander A. Makarov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Street 32, 119991 Moscow, Russia
| | - Francois Devred
- Aix-Marseille University, Inserm, CRO2 UMR_S 911, Faculté de Pharmacie, 13385 Marseille, France
| | - Hervé Kovacic
- Aix-Marseille University, Inserm, CRO2 UMR_S 911, Faculté de Pharmacie, 13385 Marseille, France
| | - Aslan A. Kubatiev
- Institute of General Pathology and Pathophysiology, RAMS, 125315, Moscow, Russian Federation
| | - Philipp O. Tsvetkov
- Aix-Marseille University, Inserm, CRO2 UMR_S 911, Faculté de Pharmacie, 13385 Marseille, France
- Institute of General Pathology and Pathophysiology, RAMS, 125315, Moscow, Russian Federation
- * E-mail:
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20
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Chen F, Haigh S, Yu Y, Benson T, Wang Y, Li X, Dou H, Bagi Z, Verin AD, Stepp DW, Csanyi G, Chadli A, Weintraub NL, Smith SME, Fulton DJR. Nox5 stability and superoxide production is regulated by C-terminal binding of Hsp90 and CO-chaperones. Free Radic Biol Med 2015; 89:793-805. [PMID: 26456056 PMCID: PMC4751585 DOI: 10.1016/j.freeradbiomed.2015.09.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 08/15/2015] [Accepted: 09/03/2015] [Indexed: 10/22/2022]
Abstract
Heat shock protein 90 (Hsp90) is a molecular chaperone that orchestrates the folding and stability of proteins that regulate cellular signaling, proliferation and inflammation. We have previously shown that Hsp90 controls the production of reactive oxygen species by modulating the activity of Noxes1-3 and 5, but not Nox4. The goal of the current study was to define the regions on Nox5 that bind Hsp90 and determine how Hsp90 regulates enzyme activity. In isolated enzyme activity assays, we found that Hsp90 inhibitors selectively decrease superoxide, but not hydrogen peroxide, production. The addition of Hsp90 alone only modestly increases Nox5 enzyme activity but in combination with the co-chaperones, Hsp70, HOP, Hsp40, and p23 it robustly stimulated superoxide, but not hydrogen peroxide, production. Proximity ligation assays reveal that Nox5 and Hsp90 interact in intact cells. In cell lysates using a co-IP approach, Hsp90 binds to Nox5 but not Nox4, and the degree of binding can be influenced by calcium-dependent stimuli. Inhibition of Hsp90 induced the degradation of full length, catalytically inactive and a C-terminal fragment (aa398-719) of Nox5. In contrast, inhibition of Hsp90 did not affect the expression levels of N-terminal fragments (aa1-550) suggesting that Hsp90 binding maintains the stability of C-terminal regions. In Co-IP assays, Hsp90 was bound only to the C-terminal region of Nox5. Further refinement using deletion analysis revealed that the region between aa490-550 mediates Hsp90 binding. Converse mapping experiments show that the C-terminal region of Nox5 bound to the M domain of Hsp90 (aa310-529). In addition to Hsp90, Nox5 bound other components of the foldosome including co-chaperones Hsp70, HOP, p23 and Hsp40. Silencing of HOP, Hsp40 and p23 reduced Nox5-dependent superoxide. In contrast, increased expression of Hsp70 decreased Nox5 activity whereas a mutant of Hsp70 failed to do so. Inhibition of Hsp90 results in the loss of higher molecular weight complexes of Nox5 and decreased interaction between monomers. Collectively these results show that the C-terminal region of Nox5 binds to the M domain of Hsp90 and that the binding of Hsp90 and select co-chaperones facilitate oligomerization and the efficient production of superoxide.
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Affiliation(s)
- Feng Chen
- Department of Forensic Medicine, Nanjing Medical University, Nanjing, Jiangsu, 210029 China; Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA.
| | - Steven Haigh
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Yanfang Yu
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Tyler Benson
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Yusi Wang
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Xueyi Li
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Huijuan Dou
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Zsolt Bagi
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Alexander D Verin
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - David W Stepp
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Gabor Csanyi
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Ahmed Chadli
- Cancer Research Center, Molecular Chaperones Program, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Neal L Weintraub
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Susan M E Smith
- Department of Molecular and Cellular Biology, Kennesaw State University, Kennesaw GA 30152, USA
| | - David J R Fulton
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA.
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21
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NADPH oxidases—do they play a role in TRPC regulation under hypoxia? Pflugers Arch 2015; 468:23-41. [DOI: 10.1007/s00424-015-1731-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 08/23/2015] [Accepted: 08/25/2015] [Indexed: 12/25/2022]
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22
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Abstract
Since the first demonstration of Nox enzyme expression in the kidney in the early 1990s and the subsequent identification of Nox4, or RENOX, a decade later, it has become apparent that the Nox family of reactive oxygen species (ROS) generating enzymes plays an integral role in the normal physiological function of the kidney. As our knowledge of Nox expression patterns and functions in various structures and specialized cell types within the kidney grows, so does the realization that Nox-derived oxidative stress contributes significantly to a wide variety of renal pathologies through their ability to modify lipids and proteins, damage DNA and activate transcriptional programmes. Diverse studies demonstrate key roles for Nox-derived ROS in kidney fibrosis, particularly in settings of chronic renal disease such as diabetic nephropathy. As the most abundant Nox family member in the kidney, much emphasis has been placed on the role of Nox4 in this setting. However, an ever growing body of work continues to uncover key roles for other Nox family members, not only in diabetic kidney disease, but in a diverse array of renal pathological conditions. The objective of the present review is to highlight the latest novel developments in renal Nox biology with an emphasis not only on diabetic nephropathy but many of the other renal disease contexts where oxidative stress is implicated.
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23
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Chuong Nguyen MV, Lardy B, Paclet MH, Rousset F, Berthier S, Baillet A, Grange L, Gaudin P, Morel F. [NADPH oxidases, Nox: new isoenzymes family]. Med Sci (Paris) 2015; 31:43-52. [PMID: 25658730 DOI: 10.1051/medsci/20153101012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
NADPH oxidases, Nox, are a family of isoenzymes, composed of seven members, whose sole function is to produce reactive oxygen species (ROS). Although Nox catalyze the same enzymatic reaction, they acquired from a common ancestor during evolution, specificities related to their tissue expression, subcellular localization, activation mechanisms and regulation. Their functions could vary depending on the pathophysiological state of the tissues. Indeed, ROS are not only bactericidal weapons in phagocytes but also essential cellular signaling molecules and their overproduction is involved in chronic diseases and diseases of aging. The understanding of the mechanisms involved in the function of Nox and the emergence of Nox inhibitors, require a thorough knowledge of their nature and structure. The objectives of this review are to highlight, in a structure/function approach, the main similar and differentiated properties shared by the human Nox isoenzymes.
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Affiliation(s)
- Minh Vu Chuong Nguyen
- GREPI (groupe de recherche et d'étude du processus inflammatoire), université Joseph Fourier, Grenoble, France EFS Rhône-Alpes, 29, avenue des Maquis du Grésivaudan, 38700 La Tronche, France
| | - Bernard Lardy
- GREPI (groupe de recherche et d'étude du processus inflammatoire), université Joseph Fourier, Grenoble, France EFS Rhône-Alpes, 29, avenue des Maquis du Grésivaudan, 38700 La Tronche, France - DBTP (département de biochimie, toxicologie et pharmacologie), institut de biologie et pathologie, CHU de Grenoble, France
| | - Marie-Hélène Paclet
- GREPI (groupe de recherche et d'étude du processus inflammatoire), université Joseph Fourier, Grenoble, France EFS Rhône-Alpes, 29, avenue des Maquis du Grésivaudan, 38700 La Tronche, France - DBTP (département de biochimie, toxicologie et pharmacologie), institut de biologie et pathologie, CHU de Grenoble, France
| | - Francis Rousset
- GREPI (groupe de recherche et d'étude du processus inflammatoire), université Joseph Fourier, Grenoble, France EFS Rhône-Alpes, 29, avenue des Maquis du Grésivaudan, 38700 La Tronche, France
| | - Sylvie Berthier
- GREPI (groupe de recherche et d'étude du processus inflammatoire), université Joseph Fourier, Grenoble, France EFS Rhône-Alpes, 29, avenue des Maquis du Grésivaudan, 38700 La Tronche, France
| | - Athan Baillet
- GREPI (groupe de recherche et d'étude du processus inflammatoire), université Joseph Fourier, Grenoble, France EFS Rhône-Alpes, 29, avenue des Maquis du Grésivaudan, 38700 La Tronche, France - Clinique universitaire de rhumatologie, Hôpital Sud, CHU de Grenoble, France
| | - Laurent Grange
- GREPI (groupe de recherche et d'étude du processus inflammatoire), université Joseph Fourier, Grenoble, France EFS Rhône-Alpes, 29, avenue des Maquis du Grésivaudan, 38700 La Tronche, France - Clinique universitaire de rhumatologie, Hôpital Sud, CHU de Grenoble, France
| | - Philippe Gaudin
- GREPI (groupe de recherche et d'étude du processus inflammatoire), université Joseph Fourier, Grenoble, France EFS Rhône-Alpes, 29, avenue des Maquis du Grésivaudan, 38700 La Tronche, France - Clinique universitaire de rhumatologie, Hôpital Sud, CHU de Grenoble, France
| | - Françoise Morel
- GREPI (groupe de recherche et d'étude du processus inflammatoire), université Joseph Fourier, Grenoble, France EFS Rhône-Alpes, 29, avenue des Maquis du Grésivaudan, 38700 La Tronche, France
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Brandes RP, Weissmann N, Schröder K. Nox family NADPH oxidases: Molecular mechanisms of activation. Free Radic Biol Med 2014; 76:208-26. [PMID: 25157786 DOI: 10.1016/j.freeradbiomed.2014.07.046] [Citation(s) in RCA: 481] [Impact Index Per Article: 48.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 07/29/2014] [Accepted: 07/30/2014] [Indexed: 11/21/2022]
Abstract
NADPH oxidases of the Nox family are important enzymatic sources of reactive oxygen species (ROS). Numerous homologue-specific mechanisms control the activity of this enzyme family involving calcium, free fatty acids, protein-protein interactions, intracellular trafficking, and posttranslational modifications such as phosphorylation, acetylation, or sumoylation. After a brief review on the classic pathways of Nox activation, this article will focus on novel mechanisms of homologue-specific activity control and on cell-specific aspects which govern Nox activity. From these findings of the recent years it must be concluded that the activity control of Nox enzymes is much more complex than anticipated. Moreover, depending on the cellular activity state, Nox enzymes are selectively activated or inactivated. The complex upstream signaling aspects of these events make the development of "intelligent" Nox inhibitors plausible, which selectively attenuate disease-related Nox-mediated ROS formation without altering physiological signaling ROS. This approach might be of relevance for Nox-mediated tissue injury in ischemia-reperfusion and inflammation and also for chronic Nox overactivation as present in cancer initiation and cardiovascular disease.
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Affiliation(s)
- Ralf P Brandes
- Institut für Kardiovaskuläre Physiologie, Goethe-Universität Frankfurt, Frankfurt, Germany.
| | - Norbert Weissmann
- ECCPS, Justus-Liebig-Universität, Member of the DZL, Giessen, Germany
| | - Katrin Schröder
- Institut für Kardiovaskuläre Physiologie, Goethe-Universität Frankfurt, Frankfurt, Germany
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25
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Noirot E, Der C, Lherminier J, Robert F, Moricova P, Kiêu K, Leborgne-Castel N, Simon-Plas F, Bouhidel K. Dynamic changes in the subcellular distribution of the tobacco ROS-producing enzyme RBOHD in response to the oomycete elicitor cryptogein. JOURNAL OF EXPERIMENTAL BOTANY 2014; 65:5011-22. [PMID: 24987013 PMCID: PMC4144778 DOI: 10.1093/jxb/eru265] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Plant NADPH oxidases, also known as respiratory burst oxidase homologues (RBOHs), have been identified as a major source of reactive oxygen species (ROS) during plant-microbe interactions. The subcellular localization of the tobacco (Nicotiana tabacum) ROS-producing enzyme RBOHD was examined in Bright Yellow-2 cells before and after elicitation with the oomycete protein cryptogein using electron and confocal microscopy. The plasma membrane (PM) localization of RBOHD was confirmed and immuno-electron microscopy on purified PM vesicles revealed its distribution in clusters. The presence of the protein fused to GFP was also seen in intracellular compartments, mainly Golgi cisternae. Cryptogein induced, within 1h, a 1.5-fold increase in RBOHD abundance at the PM and a concomitant decrease in the internal compartments. Use of cycloheximide revealed that most of the proteins targeted to the PM upon elicitation were not newly synthesized but may originate from the Golgi pool. ROS accumulation preceded RBOHD transcript- and protein-upregulation, indicating that ROS resulted from the activation of a PM-resident pool of enzymes, and that enzymes newly addressed to the PM were inactive. Taken together, the results indicate that control of RBOH abundance and subcellular localization may play a fundamental role in the mechanism of ROS production.
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Affiliation(s)
- Elodie Noirot
- INRA, UMR1347 Agroécologie, ERL CNRS 6300, Plateforme DImaCell, Centre de Microscopie INRA/Université de Bourgogne, BP 86510, F-21065 Dijon Cedex, France
| | - Christophe Der
- Université de Bourgogne, UMR1347 Agroécologie, ERL CNRS 6300, BP 86510, F-21065 Dijon Cedex, France
| | - Jeannine Lherminier
- INRA, UMR1347 Agroécologie, ERL CNRS 6300, Plateforme DImaCell, Centre de Microscopie INRA/Université de Bourgogne, BP 86510, F-21065 Dijon Cedex, France
| | - Franck Robert
- INRA, UMR1347 Agroécologie, ERL CNRS 6300, BP 86510, F-21065 Dijon Cedex, France
| | - Pavla Moricova
- INRA, UMR1347 Agroécologie, ERL CNRS 6300, BP 86510, F-21065 Dijon Cedex, France Present address: Department of Biochemistry, Faculty of Science, Palacký University in Olomouc, Šlechtitelů 11, CZ-783 71 Olomouc, Czech Republic
| | - Kiên Kiêu
- INRA, UR341 Mathématiques et Informatique Appliquées, F-78352 Jouy-en-Josas Cedex, France
| | - Nathalie Leborgne-Castel
- Université de Bourgogne, UMR1347 Agroécologie, ERL CNRS 6300, BP 86510, F-21065 Dijon Cedex, France
| | - Françoise Simon-Plas
- INRA, UMR1347 Agroécologie, ERL CNRS 6300, BP 86510, F-21065 Dijon Cedex, France
| | - Karim Bouhidel
- Université de Bourgogne, UMR1347 Agroécologie, ERL CNRS 6300, BP 86510, F-21065 Dijon Cedex, France
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26
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Abstract
SIGNIFICANCE Understanding isoform- and context-specific subcellular Nox reduced nicotinamide adenine dinucleotide phosphate (NADPH) oxidase compartmentalization allows relevant functional inferences. This review addresses the interplay between Nox NADPH oxidases and the endoplasmic reticulum (ER), an increasingly evident player in redox pathophysiology given its role in redox protein folding and stress responses. RECENT ADVANCES Catalytic/regulatory transmembrane subunits are synthesized in the ER and their processing includes folding, N-glycosylation, heme insertion, p22phox heterodimerization, as shown for phagocyte Nox2. Dual oxidase (Duox) maturation also involves the regulation by ER-resident Duoxa2. The ER is the activation site for some isoforms, typically Nox4, but potentially other isoforms. Such location influences redox/Nox-mediated calcium signaling regulation via ER targets, such as sarcoendoplasmic reticulum calcium ATPase (SERCA). Growing evidence suggests that Noxes are integral signaling elements of the unfolded protein response during ER stress, with Nox4 playing a dual prosurvival/proapoptotic role in this setting, whereas Nox2 enhances proapoptotic signaling. ER chaperones such as protein disulfide isomerase (PDI) closely interact with Noxes. PDI supports growth factor-dependent Nox1 activation and mRNA expression, as well as migration in smooth muscle cells, and PDI overexpression induces acute spontaneous Nox activation. CRITICAL ISSUES Mechanisms of PDI effects include possible support of complex formation and RhoGTPase activation. In phagocytes, PDI supports phagocytosis, Nox activation, and redox-dependent interactions with p47phox. Together, the results implicate PDI as possible Nox organizer. FUTURE DIRECTIONS We propose that convergence between Noxes and ER may have evolutive roots given ER-related functional contexts, which paved Nox evolution, namely calcium signaling and pathogen killing. Overall, the interplay between Noxes and the ER may provide relevant insights in Nox-related (patho)physiology.
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Affiliation(s)
- Francisco R M Laurindo
- Vascular Biology Laboratory, Heart Institute (InCor), University of São Paulo School of Medicine , São Paulo, Brazil
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Taglieri DM, Ushio-Fukai M, Monasky MM. P21-activated kinase in inflammatory and cardiovascular disease. Cell Signal 2014; 26:2060-9. [PMID: 24794532 DOI: 10.1016/j.cellsig.2014.04.020] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 04/27/2014] [Indexed: 02/09/2023]
Abstract
P-21 activated kinases, or PAKs, are serine-threonine kinases that serve a role in diverse biological functions and organ system diseases. Although PAK signaling has been the focus of many investigations, still our understanding of the role of PAK in inflammation is incomplete. This review consolidates what is known about PAK1 across several cell types, highlighting the role of PAK1 and PAK2 in inflammation in relation to NADPH oxidase activation. This review explores the physiological functions of PAK during inflammation, the role of PAK in several organ diseases with an emphasis on cardiovascular disease, and the PAK signaling pathway, including activators and targets of PAK. Also, we discuss PAK1 as a pharmacological anti-inflammatory target, explore the potentials and the limitations of the current pharmacological tools to regulate PAK1 activity during inflammation, and provide indications for future research. We conclude that a vast amount of evidence supports the idea that PAK is a central molecule in inflammatory signaling, thus making PAK1 itself a promising prospective pharmacological target.
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Affiliation(s)
- Domenico M Taglieri
- Department of Anesthesia and General Intensive Care Unit, Humanitas Research Hospital, Via Manzoni 56, Rozzano, 20089 (Milano), Italy.
| | - Masuko Ushio-Fukai
- Department of Pharmacology, Center for Lung and Vascular Biology, Center for Cardiovascular Research, University of Illinois at Chicago, 835 S. Wolcott Ave. E403 MSB, M/C868, Chicago, IL 60612, USA.
| | - Michelle M Monasky
- Cardiovascular Research Center, Humanitas Research Hospital, Via Manzoni 113, Rozzano, 20089 (Milano), Italy.
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28
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Smith SME, Min J, Ganesh T, Diebold B, Kawahara T, Zhu Y, McCoy J, Sun A, Snyder JP, Fu H, Du Y, Lewis I, Lambeth JD. Ebselen and congeners inhibit NADPH oxidase 2-dependent superoxide generation by interrupting the binding of regulatory subunits. ACTA ACUST UNITED AC 2014; 19:752-63. [PMID: 22726689 DOI: 10.1016/j.chembiol.2012.04.015] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Revised: 04/18/2012] [Accepted: 04/27/2012] [Indexed: 02/07/2023]
Abstract
NADPH oxidases (Nox) are a primary source of reactive oxygen species (ROS), which function in normal physiology and, when overproduced, in pathophysiology. Recent studies using mice deficient in Nox2 identify this isoform as a novel target against Nox2-implicated inflammatory diseases. Nox2 activation depends on the binding of the proline-rich domain of its heterodimeric partner p22phox to p47phox. A high-throughput screen that monitored this interaction via fluorescence polarization identified ebselen and several of its analogs as inhibitors. Medicinal chemistry was performed to explore structure-activity relationships and to optimize potency. Ebselen and analogs potently inhibited Nox1 and Nox2 activity but were less effective against other isoforms. Ebselen also blocked translocation of p47phox to neutrophil membranes. Thus, ebselen and its analogs represent a class of compounds that inhibit ROS generation by interrupting the assembly of Nox2-activating regulatory subunits.
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Affiliation(s)
- Susan M E Smith
- Department of Pathology, Emory School of Medicine, 615 Michael Street, Atlanta, GA 30322, USA
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29
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Brandes RP, Weissmann N, Schröder K. Nox family NADPH oxidases in mechano-transduction: mechanisms and consequences. Antioxid Redox Signal 2014; 20:887-98. [PMID: 23682993 PMCID: PMC3924808 DOI: 10.1089/ars.2013.5414] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
SIGNIFICANCE The majority of cells in a multi-cellular organism are continuously exposed to ever-changing physical forces. Mechano-transduction links these events to appropriate reactions of the cells involving stimulation of signaling cascades, reorganization of the cytoskeleton and alteration of gene expression. RECENT ADVANCES Mechano-transduction alters the cellular redox balance and the formation of reactive oxygen species (ROS). Nicotine amide adenine dinucleotide reduced form (NADPH) oxidases of the Nox family are prominent ROS generators and thus, contribute to this stress-induced ROS formation. CRITICAL ISSUES Different types and patterns of mechano-stress lead to Nox-dependent ROS formation and Nox-mediated ROS formation contributes to cellular responses and adaptation to physical forces. Thereby, Nox enzymes can mediate vascular protection during physiological mechano-stress. Despite this, over-activation and induction of Nox enzymes and a subsequent substantial increase in ROS formation also promotes oxidative stress in pathological situations like disturbed blood flow or extensive stretch. FUTURE DIRECTIONS Individual protein targets of Nox-mediated redox-signaling will be identified to better understand the specificity of Nox-dependent ROS signaling in mechano-transduction. Nox-inhibitors will be tested to reduce cellular activation in response to mechano-stimuli.
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Affiliation(s)
- Ralf P Brandes
- 1 Institut für Kardiovaskuläre Physiologie, Goethe-Universität Frankfurt , Frankfurt am Main, Germany
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30
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Katsuyama M. [Superoxide-generating enzymes NADPH oxidases, potential targets of drug therapy: various mechanisms for regulation of their expression]. Nihon Yakurigaku Zasshi 2013; 142:285-90. [PMID: 24334927 DOI: 10.1254/fpj.142.285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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31
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Antony S, Wu Y, Hewitt SM, Anver MR, Butcher D, Jiang G, Meitzler JL, Liu H, Juhasz A, Lu J, Roy KK, Doroshow JH. Characterization of NADPH oxidase 5 expression in human tumors and tumor cell lines with a novel mouse monoclonal antibody. Free Radic Biol Med 2013; 65:497-508. [PMID: 23851018 PMCID: PMC3859815 DOI: 10.1016/j.freeradbiomed.2013.07.005] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 06/28/2013] [Accepted: 07/02/2013] [Indexed: 12/16/2022]
Abstract
Reactive oxygen species generated by NADPH oxidase 5 (Nox5) have been implicated in physiological and pathophysiological signaling pathways, including cancer development and progression. However, because immunological tools are lacking, knowledge of the role of Nox5 in tumor biology has been limited; the expression of Nox5 protein across tumors and normal tissues is essentially unknown. Here, we report the characterization and use of a mouse monoclonal antibody against a recombinant Nox5 protein (bp 600-746) for expression profiling of Nox5 in human tumors by tissue microarray analysis. Using our novel antibody, we also report the detection of endogenous Nox5 protein in human UACC-257 melanoma cells. Immunofluorescence, confocal microscopy, and immunohistochemical techniques were employed to demonstrate Nox5 localization throughout UACC-257 cells, with perinuclear enhancement. Tissue microarray analysis revealed, for the first time, substantial Nox5 overexpression in several human cancers, including those of prostate, breast, colon, lung, brain, and ovary, as well as in malignant melanoma and non-Hodgkin lymphoma; expression in most nonmalignant tissues was negative to weak. This validated mouse monoclonal antibody will promote further exploration of the functional significance of Nox5 in human pathophysiology, including tumor cell growth and proliferation.
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Affiliation(s)
- Smitha Antony
- Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Yongzhong Wu
- Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Stephen M Hewitt
- Laboratory of Pathology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Miriam R Anver
- Pathology/Histotechnology Laboratory, SAIC Frederick, Inc./Frederick National Laboratory for Cancer Research, National Institutes of Health, Frederick, MD 21702, USA
| | - Donna Butcher
- Pathology/Histotechnology Laboratory, SAIC Frederick, Inc./Frederick National Laboratory for Cancer Research, National Institutes of Health, Frederick, MD 21702, USA
| | - Guojian Jiang
- Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Jennifer L Meitzler
- Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Han Liu
- Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Agnes Juhasz
- Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Jiamo Lu
- Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Krishnendu K Roy
- Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - James H Doroshow
- Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA; Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
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32
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Affiliation(s)
- Deepesh Pandey
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
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33
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Hoste C, Dumont JE, Miot F, De Deken X. The type of DUOX-dependent ROS production is dictated by defined sequences in DUOXA. Exp Cell Res 2012; 318:2353-64. [PMID: 22814254 DOI: 10.1016/j.yexcr.2012.07.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 07/04/2012] [Accepted: 07/08/2012] [Indexed: 01/15/2023]
Abstract
A deliberate generation of ROS is now recognized to be achieved by specific NADPH oxidases (NOX). Dual oxidases (DUOXs) are Ca(2+)-activated NOXs and operate as H(2)O(2)-generators in various tissues. A tight regulation is however required to avoid ROS overproduction that can rapidly be harmful to biological systems. DUOX activator (DUOXA) proteins act as organizing elements for surface expression and activity of the DUOX enzymes. To study DUOX activation by the maturation factors, chimeric DUOXA proteins were generated by replacing particular domains between DUOXA1 and DUOXA2. Their impact on DUOX function and membrane expression were explored in a reconstituted heterologous cell system composed of COS-7 cells. We have shown that the COOH-terminal end of DUOXA1 is responsible for DUOX1-dependent H(2)O(2) generation. The NH(2)-terminal tail of DUOXA2 is critical to specify the type of ROS released by DUOX2, hydrogen peroxide or superoxide. Native DUOXA2 would constrain DUOX2 to produce H(2)O(2). However, alterations of the DUOXA2 NH(2)-terminal domain modify DUOX2 activity triggering superoxide leaking. Our results demonstrate that specific domains of the DUOX maturation factors promote the activation of DUOXs as well as the type of ROS generated by the oxidases.
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Affiliation(s)
- Candice Hoste
- IRIBHM, Université Libre de Bruxelles, Campus Erasme, 1070 Brussels, Belgium
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34
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Kahles T, Brandes RP. NADPH oxidases as therapeutic targets in ischemic stroke. Cell Mol Life Sci 2012; 69:2345-63. [PMID: 22618244 PMCID: PMC11114534 DOI: 10.1007/s00018-012-1011-8] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 11/06/2011] [Accepted: 04/20/2012] [Indexed: 01/07/2023]
Abstract
Reactive oxygen species (ROS) act physiologically as signaling molecules. In pathological conditions, such as ischemic stroke, ROS are released in excessive amounts and upon reperfusion exceed the body's antioxidant detoxifying capacity. This process leads to brain tissue damage during reoxygenation. Consequently, antioxidant strategies have long been suggested as a therapy for experimental stroke, but clinical trials have not yet been able to promote the translation of this concept into patient treatment regimens. As an evolution of this concept, recent studies have targeted the sources of ROS generation-rather than ROS themselves. In this context, NADPH oxidases have been identified as important generators of ROS in the cerebral vasculature under both physiological conditions in general and during ischemia/reoxygenation in particular. Inhibition of NADPH oxidases or genetic deletion of certain NADPH oxidase isoforms has been found to considerably reduce ischemic injury in experimental stroke. This review focuses on recent advances in the understanding of NADPH oxidase-mediated tissue injury in the cerebral vasculature, particularly at the level of the blood-brain barrier, and highlights promising inhibitory strategies that target the NADPH oxidases.
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Affiliation(s)
- Timo Kahles
- Institut für Kardiovaskuläre Physiologie, Fachbereich Medizin der Goethe-Universität, Frankfurt, Germany.
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35
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Lassègue B, San Martín A, Griendling KK. Biochemistry, physiology, and pathophysiology of NADPH oxidases in the cardiovascular system. Circ Res 2012; 110:1364-90. [PMID: 22581922 PMCID: PMC3365576 DOI: 10.1161/circresaha.111.243972] [Citation(s) in RCA: 604] [Impact Index Per Article: 50.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Accepted: 03/09/2012] [Indexed: 02/07/2023]
Abstract
The NADPH oxidase (Nox) enzymes are critical mediators of cardiovascular physiology and pathophysiology. These proteins are expressed in virtually all cardiovascular cells, and regulate such diverse functions as differentiation, proliferation, apoptosis, senescence, inflammatory responses and oxygen sensing. They target a number of important signaling molecules, including kinases, phosphatases, transcription factors, ion channels, and proteins that regulate the cytoskeleton. Nox enzymes have been implicated in many different cardiovascular pathologies: atherosclerosis, hypertension, cardiac hypertrophy and remodeling, angiogenesis and collateral formation, stroke, and heart failure. In this review, we discuss in detail the biochemistry of Nox enzymes expressed in the cardiovascular system (Nox1, 2, 4, and 5), their roles in cardiovascular cell biology, and their contributions to disease development.
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Affiliation(s)
- Bernard Lassègue
- Division of Cardiology, Department of Medicine, Emory University, Atlanta, GA 30322, USA
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36
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Hahn NE, Meischl C, Kawahara T, Musters RJP, Verhoef VMJ, van der Velden J, Vonk ABA, Paulus WJ, van Rossum AC, Niessen HWM, Krijnen PAJ. NOX5 expression is increased in intramyocardial blood vessels and cardiomyocytes after acute myocardial infarction in humans. THE AMERICAN JOURNAL OF PATHOLOGY 2012; 180:2222-9. [PMID: 22503554 DOI: 10.1016/j.ajpath.2012.02.018] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 01/23/2012] [Accepted: 02/21/2012] [Indexed: 12/28/2022]
Abstract
Reactive oxygen species producing NADPH oxidases play important roles under different (patho)physiological conditions. NOX1, NOX2, and NOX4 are important sources of reactive oxygen species in the heart, but knowledge of the calcium-dependent NOX5 in the heart is lacking. The presence of NOX5 was studied via RT-PCR in heart tissue from patients with end-stage heart failure; the tissue was obtained during cardiac transplantation surgery. NOX5 positivity and cellular localization were studied via IHC and digital-imaging microscopy in heart tissues of patients who did not have heart disease and in infarction areas of patients who died of myocardial infarctions of different durations. Furthermore, NOX5 expression was analyzed in vitro by using Western blot analysis. NOX5 RNA was found in the hearts of controls and patients with ischemic cardiomyopathy. In controls, NOX5 localized to the endothelium of a limited number of intramyocardial blood vessels and to a limited number of scattered cardiomyocytes. In infarcted hearts, NOX5 expression increased, especially in infarctions >12 hours, which manifested as an increase in NOX5-positive intramyocardial blood vessels, as well as in endothelium, smooth muscle, and cardiomyocytes. NOX5 was found in cardiomyocyte cytoplasm, plasma membrane, intercalated disks, and cross striations. Western blot analysis confirmed NOX5 expression in isolated human cardiomyocytes. For the first time to our knowledge, we demonstrate NOX5 expression in human intramyocardial blood vessels and cardiomyocytes, with significant increases in the affected myocardium after acute myocardial infarction.
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Affiliation(s)
- Nynke E Hahn
- Department of Pathology, VU University Medical Center, Amsterdam, The Netherlands.
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37
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Pandey D, Patel A, Patel V, Chen F, Qian J, Wang Y, Barman SA, Venema RC, Stepp DW, Rudic RD, Fulton DJR. Expression and functional significance of NADPH oxidase 5 (Nox5) and its splice variants in human blood vessels. Am J Physiol Heart Circ Physiol 2012; 302:H1919-28. [PMID: 22427510 DOI: 10.1152/ajpheart.00910.2011] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The expression and functional significance of NADPH oxidase 5 (Nox5) and its five isoforms in vascular cells is poorly understood. The goal of this study was to determine whether Nox5-α, -β, -δ, -γ, and -ε (short) are expressed in human blood vessels and evaluate their respective functions. Nox5 mRNA and protein were detected in human blood vessels, cultured human vascular smooth muscle (HVSMC) and endothelium, but not fibroblasts. The most abundant isoforms were α and β, whereas δ and γ were not detected. Nox5-α and -β produced reactive oxygen species (ROS), but -δ, -γ, and -ε were not catalytically active. Coexpression of the active Nox5 isoforms with inactive Nox5 variants suppressed ROS production, and coimmunoprecipitation revealed that Nox5-β binds the inactive ε variant, which may account for reduced ROS production. In HVSMC, angiotensin II, endothelin-1 and TNF-α increased endogenous Nox5 mRNA levels, while adenovirus-mediated overexpression of Nox5 promoted p38 MAPK, JAK2, JNK, and ERK1/2 phosphorylation in endothelial cells (EC), but only increased ERK1/2 phosphorylation in HVSMC. At higher levels of Nox5, there was evidence of increased apoptosis in EC, but not in HVSMC, as detected by the presence of cleaved caspase-3 and cleaved poly(ADP-ribose)polymerase. Although catalytically inactive, Nox5-ε potently activated ERK in HVSMC, and increased expression of Nox5-ε promoted HVSMC proliferation. Nox5 is expressed in human blood vessels. The Nox5-α and -β splice variants are the major isoforms that are expressed and the only variants capable of ROS production. Nox5-ε can inhibit Nox5 activity and activate ERK and HVSMC proliferation.
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Affiliation(s)
- Deepesh Pandey
- Vascular Biology Center, Georgia Health Sciences University, Augusta, GA 30912, USA
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38
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Bedard K, Jaquet V, Krause KH. NOX5: from basic biology to signaling and disease. Free Radic Biol Med 2012; 52:725-34. [PMID: 22182486 DOI: 10.1016/j.freeradbiomed.2011.11.023] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Revised: 11/10/2011] [Accepted: 11/12/2011] [Indexed: 02/07/2023]
Abstract
In mammals, the NADPH oxidase family of enzymes comprises seven members: NOXs 1-5, DUOX1, and DUOX2. All of these enzymes function to move an electron across cellular membranes, transferring it to oxygen to generate the superoxide anion. This generation of reactive oxygen species has important physiological and pathophysiological roles. NOX5 is perhaps the least well understood of these NOX isoforms, in part because the gene is not present in mice or rats. In recent years, however, there has been a rapid increase in our understanding of the NOX5 gene, the structural and biochemical aspects of the NOX5 enzyme, the role NOX5 plays in health and disease, and the development of novel NOX inhibitors. This review takes a look back at some historical aspects of the discovery of NOX5 and summarizes our current understanding of the enzyme.
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Affiliation(s)
- Karen Bedard
- Department of Pathology, Dalhousie University, Halifax, Canada
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Takac I, Schröder K, Zhang L, Lardy B, Anilkumar N, Lambeth JD, Shah AM, Morel F, Brandes RP. The E-loop is involved in hydrogen peroxide formation by the NADPH oxidase Nox4. J Biol Chem 2011; 286:13304-13. [PMID: 21343298 DOI: 10.1074/jbc.m110.192138] [Citation(s) in RCA: 401] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
In contrast to the NADPH oxidases Nox1 and Nox2, which generate superoxide (O(2)(·-)), Nox4 produces hydrogen peroxide (H(2)O(2)). We constructed chimeric proteins and mutants to address the protein region that specifies which reactive oxygen species is produced. Reactive oxygen species were measured with luminol/horseradish peroxidase and Amplex Red for H(2)O(2) versus L-012 and cytochrome c for O(2)(·-). The third extracytosolic loop (E-loop) of Nox4 is 28 amino acids longer than that of Nox1 or Nox2. Deletion of E-loop amino acids only present in Nox4 or exchange of the two cysteines in these stretches switched Nox4 from H(2)O(2) to O(2)(·-) generation while preserving expression and intracellular localization. In the presence of an NO donor, the O(2)()-producing Nox4 mutants, but not wild-type Nox4, generated peroxynitrite, excluding artifacts of the detection system as the apparent origin of O(2)(·-). In Cos7 cells, in which Nox4 partially localizes to the plasma membrane, an antibody directed against the E-loop decreased H(2)O(2) but increased O(2)(·-) formation by Nox4 without affecting Nox1-dependent O(2)(·-) formation. The E-loop of Nox4 but not Nox1 and Nox2 contains a highly conserved histidine that could serve as a source for protons to accelerate spontaneous dismutation of superoxide to form H(2)O(2). Mutation of this but not of four other conserved histidines also switched Nox4 from H(2)O(2) to O(2)(·-) formation. Thus, H(2)O(2) formation is an intrinsic property of Nox4 that involves its E-loop. The structure of the E-loop may hinder O(2)(·-) egress and/or provide a source for protons, allowing dismutation to form H(2)O(2).
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Affiliation(s)
- Ina Takac
- Institut für Kardiovaskuläre Physiologie, Goethe-Universität, 60596 Frankfurt am Main, Germany
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