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Yadav S, Ganta V, Sudhahar V, Ash D, Nagarkoti S, Das A, McMenamin M, Kelley S, Fukai T, Ushio-Fukai M. Myeloid Drp1 Deficiency Limits Revascularization in Ischemic Muscles via Inflammatory Macrophage Polarization and Metabolic Reprograming. bioRxiv 2023:2023.11.04.565656. [PMID: 37961122 PMCID: PMC10635146 DOI: 10.1101/2023.11.04.565656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
In the preclinical model of peripheral arterial disease (PAD), M2-like anti-inflammatory macrophage polarization and angiogenesis are required for revascularization. The regulation of cell metabolism and inflammation in macrophages is tightly linked to mitochondrial dynamics. Drp1, a mitochondrial fission protein, has shown context-dependent macrophage phenotypes with both pro- and anti-inflammatory characteristics. However, the role of macrophage Drp1 in reparative neovascularization remains unexplored. Here we show that Drp1 expression was significantly increased in F4/80+ macrophages within ischemic muscle at day 3 following hindlimb ischemia (HLI), an animal model of PAD. Myeloid-specific Drp1 -/- mice exhibited reduced limb perfusion recovery, angiogenesis and muscle regeneration after HLI. These effects were concomitant with enhancement of pro-inflammatory M1-like macrophages, p-NFkB, and TNFα levels, while showing reduction in anti-inflammatory M2-like macrophages and p-AMPK in ischemic muscle of myeloid Drp1 -/- mice. In vitro, Drp1 -/- macrophages under hypoxia serum starvation (HSS), an in vitro PAD model, demonstrated enhanced glycolysis via reducing p-AMPK as well as mitochondrial dysfunction and excessive mitochondrial ROS, resulting in increased M1-gene and reduced M2-gene expression. Conditioned media from HSS-treated Drp1 -/- macrophages exhibited increased secretion of pro-inflammatory cytokines and suppressed angiogenic responses in cultured endothelial cells. Thus, Drp1 deficiency in macrophages under ischemia drives inflammatory metabolic reprogramming and macrophage polarization, thereby limiting revascularization in experimental PAD.
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Atawia RT, Batori R, Jordan CR, Kennard S, Antonova G, Bruder-Nascimento T, Mehta V, Saeed MI, Patel VS, Fukai T, Ushio-Fukai M, Huo Y, Fulton DJR, de Chantemèle EJB. Type 1 Diabetes Impairs Endothelium-Dependent Relaxation Via Increasing Endothelial Cell Glycolysis Through Advanced Glycation End Products, PFKFB3, and Nox1-Mediated Mechanisms. Hypertension 2023; 80:2059-2071. [PMID: 37729634 PMCID: PMC10514399 DOI: 10.1161/hypertensionaha.123.21341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Accepted: 08/02/2023] [Indexed: 09/22/2023]
Abstract
BACKGROUND Type 1 diabetes (T1D) is a major cause of endothelial dysfunction. Although cellular bioenergetics has been identified as a new regulator of vascular function, whether glycolysis, the primary bioenergetic pathway in endothelial cells (EC), regulates vascular tone and contributes to impaired endothelium-dependent relaxation (EDR) in T1D remains unknown. METHODS Experiments were conducted in Akita mice with intact or selective deficiency in EC PFKFB3 (6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase 3), the main regulator of glycolysis. Seahorse analyzer and myography were employed to measure glycolysis and mitochondrial respiration, and EDR, respectively, in aortic explants. EC PFKFB3 (Ad-PFKFB3) and glycolysis (Ad-GlycoHi) were increased in situ via adenoviral transduction. RESULTS T1D increased EC glycolysis and elevated EC expression of PFKFB3 and NADPH oxidase Nox1 (NADPH oxidase homolog 1). Functionally, pharmacological and genetic inhibition of PFKFB3 restored EDR in T1D, while in situ aorta EC transduction with Ad-PFKFB3 or Ad-GlycoHi reproduced the impaired EDR associated with T1D. Nox1 inhibition restored EDR in aortic rings from Akita mice, as well as in Ad-PFKFB3-transduced aorta EC and lactate-treated wild-type aortas. T1D increased the expression of the advanced glycation end product precursor methylglyoxal in the aortas. Exposure of the aortas to methylglyoxal impaired EDR, which was prevented by PFKFB3 inhibition. T1D and exposure to methylglyoxal increased EC expression of HIF1α (hypoxia-inducible factor 1α), whose inhibition blunted methylglyoxal-mediated EC PFKFB3 upregulation. CONCLUSIONS EC bioenergetics, namely glycolysis, is a new regulator of vasomotion and excess glycolysis, a novel mechanism of endothelial dysfunction in T1D. We introduce excess methylglyoxal, HIF1α, and PFKFB3 as major effectors in T1D-mediated increased EC glycolysis.
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Affiliation(s)
- Reem T. Atawia
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, Abasia, Cairo, Egypt
| | - Robert Batori
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Coleton R. Jordan
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Simone Kennard
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Galina Antonova
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | | | - Vinay Mehta
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Muhammad I. Saeed
- Department of Surgery, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Vijay S Patel
- Department of Surgery, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Tohru Fukai
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Masuko Ushio-Fukai
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Yuqing Huo
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - David JR Fulton
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
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Zaied AA, Ushio-Fukai M, Fukai T, Kovacs-Kasa A, Alhusban S, Sudhahar V, Ganta VC, Annex BH. Pentose Pathway Activation Is Superior to Increased Glycolysis for Therapeutic Angiogenesis in Peripheral Arterial Disease. J Am Heart Assoc 2023; 12:e027986. [PMID: 36974760 PMCID: PMC10122893 DOI: 10.1161/jaha.122.027986] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
Background In endothelial cells (ECs), glycolysis, regulated by PFKFB3 (6-phosphofructo-2-kinase/fructose-2,6-biphosphatase, isoform-3), is the major metabolic pathway for ATP generation. In preclinical peripheral artery disease models, VEGF165a (vascular endothelial growth factor165a) and microRNA-93 both promote angiogenesis. Methods and Results Mice following hind-limb ischemia (HLI) and ECs with, and without, hypoxia and serum starvation were examined with, and without, microRNA-93 and VEGF165a. Post-HLI perfusion recovery was monitored. EC metabolism was studied using seahorse assay, and the expression and activity of major metabolism genes were assessed. Reactive oxygen species levels and EC permeability were evaluated. C57Bl/6J mice generated a robust angiogenic response to HLI, with ECs from ischemic versus nonischemic muscle demonstrating no increase in glycolysis. Balb/CJ mice generated a poor angiogenic response post-HLI; ischemic versus nonischemic ECs demonstrated significant increase in glycolysis. MicroRNA-93-treated Balb/CJ mice post-HLI showed better perfusion recovery, with ischemic versus nonischemic ECs showing no increase in glycolysis. VEGF165a-treated Balb/CJ mice post-HLI showed no improvement in perfusion recovery with ischemic versus nonischemic ECs showing significant increase in glycolysis. ECs under hypoxia and serum starvation upregulated PFKFB3. In ECs under hypoxia and serum starvation, VEGF165a versus control significantly upregulated PFKFB3 and glycolysis, whereas miR-93 versus control demonstrated no increase in PFKFB3 or glycolysis. MicroRNA-93 versus VEGF165a upregulated glucose-6-phosphate dehydrogenase expression and activity, activating the pentose phosphate pathway. MicroRNA-93 versus control increased reduced nicotinamide adenine dinucleotide phosphate and virtually eliminated the increase in reactive oxygen species. In ECs under hypoxia and serum starvation, VEGF165a significantly increased and miR-93 decreased EC permeability. Conclusions In peripheral artery disease, activation of the pentose phosphate pathway to promote angiogenesis may offer potential therapeutic advantages.
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Affiliation(s)
- Abdelrahman A Zaied
- Vascular Biology Center Medical College of Georgia at Augusta University Augusta GA USA
- Department of Medicine Medical College of Georgia at Augusta University Augusta GA USA
| | - Masuko Ushio-Fukai
- Vascular Biology Center Medical College of Georgia at Augusta University Augusta GA USA
| | - Tohru Fukai
- Departments of Pharmacology and Toxicology Medical College of Georgia at Augusta University Augusta GA USA
- Charlie Norwood Veterans Affairs Medical Center Augusta GA USA
| | - Anita Kovacs-Kasa
- Vascular Biology Center Medical College of Georgia at Augusta University Augusta GA USA
| | - Suhib Alhusban
- Vascular Biology Center Medical College of Georgia at Augusta University Augusta GA USA
| | - Varadarajan Sudhahar
- Vascular Biology Center Medical College of Georgia at Augusta University Augusta GA USA
| | - Vijay C Ganta
- Vascular Biology Center Medical College of Georgia at Augusta University Augusta GA USA
| | - Brian H Annex
- Vascular Biology Center Medical College of Georgia at Augusta University Augusta GA USA
- Department of Medicine Medical College of Georgia at Augusta University Augusta GA USA
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Nagarkoti S, Kim YM, Ash D, Das A, Vitriol E, Read TA, Youn SW, Sudhahar V, McMenamin M, Hou Y, Boatwright H, Caldwell R, Essex DW, Cho J, Fukai T, Ushio-Fukai M. Protein disulfide isomerase A1 as a novel redox sensor in VEGFR2 signaling and angiogenesis. Angiogenesis 2023; 26:77-96. [PMID: 35984546 PMCID: PMC9918675 DOI: 10.1007/s10456-022-09852-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 07/26/2022] [Indexed: 02/04/2023]
Abstract
VEGFR2 signaling in endothelial cells (ECs) is regulated by reactive oxygen species (ROS) derived from NADPH oxidases (NOXs) and mitochondria, which plays an important role in postnatal angiogenesis. However, it remains unclear how highly diffusible ROS signal enhances VEGFR2 signaling and reparative angiogenesis. Protein disulfide isomerase A1 (PDIA1) functions as an oxidoreductase depending on the redox environment. We hypothesized that PDIA1 functions as a redox sensor to enhance angiogenesis. Here we showed that PDIA1 co-immunoprecipitated with VEGFR2 or colocalized with either VEGFR2 or an early endosome marker Rab5 at the perinuclear region upon stimulation of human ECs with VEGF. PDIA1 silencing significantly reduced VEGF-induced EC migration, proliferation and spheroid sprouting via inhibiting VEGFR2 signaling. Mechanistically, VEGF stimulation rapidly increased Cys-OH formation of PDIA1 via the NOX4-mitochondrial ROS axis. Overexpression of "redox-dead" mutant PDIA1 with replacement of the active four Cys residues with Ser significantly inhibited VEGF-induced PDIA1-CysOH formation and angiogenic responses via reducing VEGFR2 phosphorylation. Pdia1+/- mice showed impaired angiogenesis in developmental retina and Matrigel plug models as well as ex vivo aortic ring sprouting model. Study using hindlimb ischemia model revealed that PDIA1 expression was markedly increased in angiogenic ECs of ischemic muscles, and that ischemia-induced limb perfusion recovery and neovascularization were impaired in EC-specific Pdia1 conditional knockout mice. These results suggest that PDIA1 can sense VEGF-induced H2O2 signal via CysOH formation to promote VEGFR2 signaling and angiogenesis in ECs, thereby enhancing postnatal angiogenesis. The oxidized PDIA1 is a potential therapeutic target for treatment of ischemic vascular diseases.
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Affiliation(s)
- Sheela Nagarkoti
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney-Walker Blvd, Augusta, GA, 30912, USA
| | - Young-Mee Kim
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney-Walker Blvd, Augusta, GA, 30912, USA
- Department of Medicine (Cardiology), University of Illinois at Chicago, Chicago, IL, USA
| | - Dipankar Ash
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney-Walker Blvd, Augusta, GA, 30912, USA
| | - Archita Das
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney-Walker Blvd, Augusta, GA, 30912, USA
| | - Eric Vitriol
- Neuroscience and Regenerative Medicine, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Tracy-Ann Read
- Neuroscience and Regenerative Medicine, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Seock-Won Youn
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney-Walker Blvd, Augusta, GA, 30912, USA
- Department of Physiology and Biophysics, University of Illinois at Chicago, Chicago, IL, USA
- Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, IL, USA
| | - Varadarajan Sudhahar
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney-Walker Blvd, Augusta, GA, 30912, USA
- Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, 30912, USA
| | - Malgorzata McMenamin
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney-Walker Blvd, Augusta, GA, 30912, USA
- Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, 30912, USA
| | - Yali Hou
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney-Walker Blvd, Augusta, GA, 30912, USA
- Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, 30912, USA
| | - Harriet Boatwright
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney-Walker Blvd, Augusta, GA, 30912, USA
| | - Ruth Caldwell
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney-Walker Blvd, Augusta, GA, 30912, USA
- Vision Discovery Institute, Medical College of Georgia at Augusta University, Augusta, GA, USA
- Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, 30912, USA
| | - David W Essex
- Department of Medicine, Temple University School of Medicine, Philadelphia, PA, USA
| | - Jaehyung Cho
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - Tohru Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney-Walker Blvd, Augusta, GA, 30912, USA
- Departments of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, Augusta, GA, USA
- Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, 30912, USA
| | - Masuko Ushio-Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University, 1460 Laney-Walker Blvd, Augusta, GA, 30912, USA.
- Department of Medicine (Cardiology), Medical College of Georgia at Augusta University, Augusta, GA, 30912, USA.
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Sudhahar V, Shi Y, Kaplan JH, Ushio-Fukai M, Fukai T. Whole-Transcriptome Sequencing Analyses of Nuclear Antixoxidant-1 in Endothelial Cells: Role in Inflammation and Atherosclerosis. Cells 2022; 11:2919. [PMID: 36139494 PMCID: PMC9496719 DOI: 10.3390/cells11182919] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 09/08/2022] [Accepted: 09/15/2022] [Indexed: 11/26/2022] Open
Abstract
Inflammation, oxidative stress, and copper (Cu) play an important role in cardiovascular disease, including atherosclerosis. We previously reported that cytosolic Cu chaperone antioxidant-1 (Atox1) translocates to the nucleus in response to inflammatory cytokines or exogenous Cu and that Atox1 is localized at the nucleus in the endothelium of inflamed atherosclerotic aorta. However, the roles of nuclear Atox1 and their function are poorly understood. Here we showed that Atox1 deficiency in ApoE-/- mice with a Western diet exhibited a significant reduction of atherosclerotic lesion formation. In vitro, adenovirus-mediated overexpression of nuclear-targeted Atox1 (Ad-Atox1-NLS) in cultured human endothelial cells (ECs) increased monocyte adhesion and reactive oxygen species (ROS) production compared to control cells (Ad-null). To address the underlying mechanisms, we performed genome-wide mapping of Atox1-regulated targets in ECs, using an unbiased systemic approach integrating sequencing data. Combination of ChIP-Seq and RNA-Seq analyses in ECs transfected with Ad-Atox1-NLS or Ad-null identified 1387 differentially expressed genes (DEG). Motif enrichment assay and KEGG pathway enrichment analysis revealed that 248 differentially expressed genes, including inflammatory and angiogenic genes, were regulated by Atox1-NLS, which was then confirmed by real-time qPCR. Among these genes, functional analysis of inflammatory responses identified CD137, CSF1, and IL5RA as new nuclear Atox1-targeted inflammatory genes, while CD137 is also a key regulator of Atox1-NLS-induced ROS production. These findings uncover new nuclear Atox1 downstream targets involved in inflammation and ROS production and provide insights into the nuclear Atox1 as a potential therapeutic target for the treatment of inflammatory diseases such as atherosclerosis.
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Affiliation(s)
- Varadarajan Sudhahar
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
- Charlie Norwood Veterans Affairs Medical Center, Augusta, GA 30901, USA
| | - Yang Shi
- Department of Population Health Science, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Jack H. Kaplan
- Department of Biochemistry and Molecular Genetics, University of Illinois College of Medicine, Chicago, IL 60607, USA
| | - Masuko Ushio-Fukai
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
- Department of Medicine (Cardiology), Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Tohru Fukai
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
- Charlie Norwood Veterans Affairs Medical Center, Augusta, GA 30901, USA
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Zou J, Wang W, Ayala J, Ushio-Fukai M, Fukai T, Yoon Y, Chen W, Li J, Su H. Abstract P2033: Neddylation Regulates Cardiac Mitochondria Homeostasis. Circ Res 2022. [DOI: 10.1161/res.131.suppl_1.p2033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Neddylation is a reversible post-translational modification that covalently attaches ubiquitin-like protein NEDD8 to target proteins via NEDD8-specific E1-E2-E3 enzymes. Through regulating the function of various cellular proteins, neddylation impacts diverse cellular processes and disease states. We have previously identified an indispensable role for neddylation in cardiac chamber maturation through sustaining YAP signaling in the developing heart. However, the importance of neddylation in post-mitotic hearts remains unclear. Here we report neddylation as a novel post-translation mechanism regulating mitochondrial homeostasis in adult heart. Inducible deletion of NAE1, a regulatory subunit of NEDD8 E1 enzyme, in adult mouse heart resulted in dilated cardiomyopathy, heart failure, and eventually premature lethality. The severe cardiac phenotype was preceded by accumulation of mitophagic vesicles and mitochondrial elongation, accompanied by pronounced upregulation of mitophagic markers and alterations in mitochondrial dynamics proteins. Moreover, we found that neddylation is required for mitochondrial ubiquitination and turnover. Consequently, pharmacological and genetic inhibition of neddylation accumulated damaged mitochondria, impaired mitochondrial membrane potential, inhibited mitochondrial respiration, and increased cardiomyocyte cell death in both neonatal and adult cardiomyocytes. Mechanistically, neddylation of Cullins is essential for the assembly of a functional multi-subunit Cullin-RING ubiquitin ligase, which appears to mediate mitochondrial ubiquitination following mitochondrial damage. Taken together, our findings suggest that neddylation serves as a novel mechanism surveilling mitochondrial quality and is essential for the function of normal adult heart.
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Atawia RT, Bruder do Nascimento T, Batori R, Kennard S, Antonova G, Ushio‐Fukai M, Fukai T, Huo Y, Patel VS, Fulton DJR, Belin de Chantemèle EJ. Impairment in endothelial bioenergetics contributes to diabetes‐induced vascular dysfunction. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.r2666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Reem T. Atawia
- Vascular Biology CenterMedical College of Georgia, Augusta UniversityAugustaGA
| | | | - Robert Batori
- Vascular Biology CenterMedical College of Georgia, Augusta UniversityAugustaGA
| | - Simone Kennard
- Vascular Biology CenterMedical College of Georgia, Augusta UniversityAugustaGA
| | - Galina Antonova
- Vascular Biology CenterMedical College of Georgia, Augusta UniversityAugustaGA
| | - Masuko Ushio‐Fukai
- Vascular Biology CenterMedical College of Georgia, Augusta UniversityAugustaGA
| | - Tohru Fukai
- Vascular Biology CenterMedical College of Georgia, Augusta UniversityAugustaGA
| | - Yuqing Huo
- Vascular Biology CenterMedical College of Georgia, Augusta UniversityAugustaGA
| | - Vijay S. Patel
- Department of MedicineMedical College of Georgia, Augusta UniversityAugustaGA
| | - David J. R. Fulton
- Vascular Biology CenterMedical College of Georgia, Augusta UniversityAugustaGA
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Abdelsaid K, Sudhahar V, Harris RA, Das A, Youn SW, Liu Y, McMenamin M, Hou Y, Fulton D, Hamrick MW, Tang Y, Fukai T, Ushio-Fukai M. Exercise improves angiogenic function of circulating exosomes in type 2 diabetes: Role of exosomal SOD3. FASEB J 2022; 36:e22177. [PMID: 35142393 PMCID: PMC8880294 DOI: 10.1096/fj.202101323r] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Revised: 12/29/2021] [Accepted: 01/07/2022] [Indexed: 01/31/2023]
Abstract
Exosomes, key mediators of cell-cell communication, derived from type 2 diabetes mellitus (T2DM) exhibit detrimental effects. Exercise improves endothelial function in part via the secretion of exosomes into circulation. Extracellular superoxide dismutase (SOD3) is a major secretory copper (Cu) antioxidant enzyme that catalyzes the dismutation of O2•- to H2 O2 whose activity requires the Cu transporter ATP7A. However, the role of SOD3 in exercise-induced angiogenic effects of circulating plasma exosomes on endothelial cells (ECs) in T2DM remains unknown. Here, we show that both SOD3 and ATP7A proteins were present in plasma exosomes in mice, which was significantly increased after two weeks of volunteer wheel exercise. A single bout of exercise in humans also showed a significant increase in SOD3 and ATP7A protein expression in plasma exosomes. Plasma exosomes from T2DM mice significantly reduced angiogenic responses in human ECs or mouse skin wound healing models, which was associated with a decrease in ATP7A, but not SOD3 expression in exosomes. Exercise training in T2DM mice restored the angiogenic effects of T2DM exosomes in ECs by increasing ATP7A in exosomes, which was not observed in exercised T2DM/SOD3-/- mice. Furthermore, exosomes overexpressing SOD3 significantly enhanced angiogenesis in ECs by increasing local H2 O2 levels in a heparin-binding domain-dependent manner as well as restored defective wound healing and angiogenesis in T2DM or SOD3-/- mice. In conclusion, exercise improves the angiogenic potential of circulating exosomes in T2DM in a SOD3-dependent manner. Exosomal SOD3 may provide an exercise mimetic therapy that supports neovascularization and wound repair in cardiometabolic disease.
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Affiliation(s)
- Kareem Abdelsaid
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA,Charlie Norwood Veterans Affairs Medical Center, Augusta, GA
| | - Varadarajan Sudhahar
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA,Department of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, Augusta, GA,Charlie Norwood Veterans Affairs Medical Center, Augusta, GA
| | | | - Archita Das
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA,Department of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, Augusta, GA
| | - Seock-Won Youn
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA,Department of Physiology and Biophysics, University of Illinois, Chicago, IL
| | - Yutao Liu
- Department of cell biology, Medical College of Georgia at Augusta University, Augusta, GA
| | - Maggie McMenamin
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA
| | - Yali Hou
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA
| | - David Fulton
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA,Department of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, Augusta, GA
| | - Mark W. Hamrick
- Department of cell biology, Medical College of Georgia at Augusta University, Augusta, GA
| | - Yaoliang Tang
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA,Department of Medicine (Cardiology), Medical College of Georgia at Augusta University, Augusta, GA
| | - Tohru Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA,Department of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, Augusta, GA,Charlie Norwood Veterans Affairs Medical Center, Augusta, GA
| | - Masuko Ushio-Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA,Department of Medicine (Cardiology), Medical College of Georgia at Augusta University, Augusta, GA
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9
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Lucas R, Hadizamani Y, Enkhbaatar P, Csanyi G, Caldwell RW, Hundsberger H, Sridhar S, Lever AA, Hudel M, Ash D, Ushio-Fukai M, Fukai T, Chakraborty T, Verin A, Eaton DC, Romero M, Hamacher J. Dichotomous Role of Tumor Necrosis Factor in Pulmonary Barrier Function and Alveolar Fluid Clearance. Front Physiol 2022; 12:793251. [PMID: 35264975 PMCID: PMC8899333 DOI: 10.3389/fphys.2021.793251] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 11/30/2021] [Indexed: 02/04/2023] Open
Abstract
Alveolar-capillary leak is a hallmark of the acute respiratory distress syndrome (ARDS), a potentially lethal complication of severe sepsis, trauma and pneumonia, including COVID-19. Apart from barrier dysfunction, ARDS is characterized by hyper-inflammation and impaired alveolar fluid clearance (AFC), which foster the development of pulmonary permeability edema and hamper gas exchange. Tumor Necrosis Factor (TNF) is an evolutionarily conserved pleiotropic cytokine, involved in host immune defense against pathogens and cancer. TNF exists in both membrane-bound and soluble form and its mainly -but not exclusively- pro-inflammatory and cytolytic actions are mediated by partially overlapping TNFR1 and TNFR2 binding sites situated at the interface between neighboring subunits in the homo-trimer. Whereas TNFR1 signaling can mediate hyper-inflammation and impaired barrier function and AFC in the lungs, ligand stimulation of TNFR2 can protect from ventilation-induced lung injury. Spatially distinct from the TNFR binding sites, TNF harbors within its structure a lectin-like domain that rather protects lung function in ARDS. The lectin-like domain of TNF -mimicked by the 17 residue TIP peptide- represents a physiological mediator of alveolar-capillary barrier protection. and increases AFC in both hydrostatic and permeability pulmonary edema animal models. The TIP peptide directly activates the epithelial sodium channel (ENaC) -a key mediator of fluid and blood pressure control- upon binding to its α subunit, which is also a part of the non-selective cation channel (NSC). Activity of the lectin-like domain of TNF is preserved in complexes between TNF and its soluble TNFRs and can be physiologically relevant in pneumonia. Antibody- and soluble TNFR-based therapeutic strategies show considerable success in diseases such as rheumatoid arthritis, psoriasis and inflammatory bowel disease, but their chronic use can increase susceptibility to infection. Since the lectin-like domain of TNF does not interfere with TNF's anti-bacterial actions, while exerting protective actions in the alveolar-capillary compartments, it is currently evaluated in clinical trials in ARDS and COVID-19. A more comprehensive knowledge of the precise role of the TNFR binding sites versus the lectin-like domain of TNF in lung injury, tissue hypoxia, repair and remodeling may foster the development of novel therapeutics for ARDS.
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Affiliation(s)
- Rudolf Lucas
- Vascular Biology Center, Augusta University, Augusta, GA, United States,Department of Pharmacology and Toxicology, Augusta University, Augusta, GA, United States,Department of Medicine, Medical College of Georgia, Augusta University, Augusta, GA, United States,*Correspondence: Rudolf Lucas,
| | - Yalda Hadizamani
- Lungen-und Atmungsstiftung Bern, Bern, Switzerland,Pneumology, Clinic for General Internal Medicine, Lindenhofspital Bern, Bern, Switzerland
| | - Perenlei Enkhbaatar
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, TX, United States
| | - Gabor Csanyi
- Vascular Biology Center, Augusta University, Augusta, GA, United States,Department of Pharmacology and Toxicology, Augusta University, Augusta, GA, United States
| | - Robert W. Caldwell
- Department of Pharmacology and Toxicology, Augusta University, Augusta, GA, United States
| | - Harald Hundsberger
- Department of Medical Biotechnology, University of Applied Sciences, Krems, Austria,Department of Dermatology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Supriya Sridhar
- Vascular Biology Center, Augusta University, Augusta, GA, United States
| | - Alice Ann Lever
- Vascular Biology Center, Augusta University, Augusta, GA, United States,Department of Medicine, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Martina Hudel
- Institute for Medical Microbiology, Justus-Liebig University, Giessen, Germany
| | - Dipankar Ash
- Vascular Biology Center, Augusta University, Augusta, GA, United States
| | - Masuko Ushio-Fukai
- Vascular Biology Center, Augusta University, Augusta, GA, United States,Department of Medicine, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Tohru Fukai
- Vascular Biology Center, Augusta University, Augusta, GA, United States,Department of Pharmacology and Toxicology, Augusta University, Augusta, GA, United States,Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, United States
| | - Trinad Chakraborty
- Institute for Medical Microbiology, Justus-Liebig University, Giessen, Germany
| | - Alexander Verin
- Vascular Biology Center, Augusta University, Augusta, GA, United States,Department of Medicine, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Douglas C. Eaton
- Department of Medicine, School of Medicine, Emory University, Atlanta, GA, United States
| | - Maritza Romero
- Vascular Biology Center, Augusta University, Augusta, GA, United States,Department of Pharmacology and Toxicology, Augusta University, Augusta, GA, United States,Department of Anesthesiology and Perioperative Medicine, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Jürg Hamacher
- Lungen-und Atmungsstiftung Bern, Bern, Switzerland,Pneumology, Clinic for General Internal Medicine, Lindenhofspital Bern, Bern, Switzerland,Medical Clinic V-Pneumology, Allergology, Intensive Care Medicine, and Environmental Medicine, Faculty of Medicine, University Medical Centre of the Saarland, Saarland University, Homburg, Germany,Institute for Clinical & Experimental Surgery, Faculty of Medicine, Saarland University, Homburg, Germany,Jürg Hamacher,
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10
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Ushio-Fukai M, Ash D, Nagarkoti S, Belin de Chantemèle EJ, Fulton DJR, Fukai T. Interplay Between Reactive Oxygen/Reactive Nitrogen Species and Metabolism in Vascular Biology and Disease. Antioxid Redox Signal 2021; 34:1319-1354. [PMID: 33899493 PMCID: PMC8418449 DOI: 10.1089/ars.2020.8161] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Reactive oxygen species (ROS; e.g., superoxide [O2•-] and hydrogen peroxide [H2O2]) and reactive nitrogen species (RNS; e.g., nitric oxide [NO•]) at the physiological level function as signaling molecules that mediate many biological responses, including cell proliferation, migration, differentiation, and gene expression. By contrast, excess ROS/RNS, a consequence of dysregulated redox homeostasis, is a hallmark of cardiovascular disease. Accumulating evidence suggests that both ROS and RNS regulate various metabolic pathways and enzymes. Recent studies indicate that cells have mechanisms that fine-tune ROS/RNS levels by tight regulation of metabolic pathways, such as glycolysis and oxidative phosphorylation. The ROS/RNS-mediated inhibition of glycolytic pathways promotes metabolic reprogramming away from glycolytic flux toward the oxidative pentose phosphate pathway to generate nicotinamide adenine dinucleotide phosphate (NADPH) for antioxidant defense. This review summarizes our current knowledge of the mechanisms by which ROS/RNS regulate metabolic enzymes and cellular metabolism and how cellular metabolism influences redox homeostasis and the pathogenesis of disease. A full understanding of these mechanisms will be important for the development of new therapeutic strategies to treat diseases associated with dysregulated redox homeostasis and metabolism. Antioxid. Redox Signal. 34, 1319-1354.
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Affiliation(s)
- Masuko Ushio-Fukai
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA.,Department of Medicine (Cardiology) and Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Dipankar Ash
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA.,Department of Medicine (Cardiology) and Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Sheela Nagarkoti
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA.,Department of Medicine (Cardiology) and Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Eric J Belin de Chantemèle
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA.,Department of Medicine (Cardiology) and Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - David J R Fulton
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA.,Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Tohru Fukai
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA.,Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, Georgia, USA.,Charlie Norwood Veterans Affairs Medical Center, Augusta, Georgia, USA
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11
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Ash D, Sudhahar V, Youn SW, Okur MN, Das A, O'Bryan JP, McMenamin M, Hou Y, Kaplan JH, Fukai T, Ushio-Fukai M. The P-type ATPase transporter ATP7A promotes angiogenesis by limiting autophagic degradation of VEGFR2. Nat Commun 2021; 12:3091. [PMID: 34035268 PMCID: PMC8149886 DOI: 10.1038/s41467-021-23408-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 04/26/2021] [Indexed: 01/05/2023] Open
Abstract
VEGFR2 (KDR/Flk1) signaling in endothelial cells (ECs) plays a central role in angiogenesis. The P-type ATPase transporter ATP7A regulates copper homeostasis, and its role in VEGFR2 signaling and angiogenesis is entirely unknown. Here, we describe the unexpected crosstalk between the Copper transporter ATP7A, autophagy, and VEGFR2 degradation. The functional significance of this Copper transporter was demonstrated by the finding that inducible EC-specific ATP7A deficient mice or ATP7A-dysfunctional ATP7Amut mice showed impaired post-ischemic neovascularization. In ECs, loss of ATP7A inhibited VEGF-induced VEGFR2 signaling and angiogenic responses, in part by promoting ligand-induced VEGFR2 protein degradation. Mechanistically, VEGF stimulated ATP7A translocation from the trans-Golgi network to the plasma membrane where it bound to VEGFR2, which prevented autophagy-mediated lysosomal VEGFR2 degradation by inhibiting autophagic cargo/adapter p62/SQSTM1 binding to ubiquitinated VEGFR2. Enhanced autophagy flux due to ATP7A dysfunction in vivo was confirmed by autophagy reporter CAG-ATP7Amut -RFP-EGFP-LC3 transgenic mice. In summary, our study uncovers a novel function of ATP7A to limit autophagy-mediated degradation of VEGFR2, thereby promoting VEGFR2 signaling and angiogenesis, which restores perfusion recovery and neovascularization. Thus, endothelial ATP7A is identified as a potential therapeutic target for treatment of ischemic cardiovascular diseases.
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Affiliation(s)
- Dipankar Ash
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Varadarajan Sudhahar
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
- Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, USA
| | - Seock-Won Youn
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
- Department of Physiology and Biophysics, University of Illinois College of Medicine, Chicago, IL, USA
| | - Mustafa Nazir Okur
- Laboratory of Molecular Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Archita Das
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - John P O'Bryan
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, USA
- Ralph H. Johnson VA Medical Center, Charleston, SC, USA
| | - Maggie McMenamin
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
- Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, USA
| | - Yali Hou
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
- Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, USA
| | - Jack H Kaplan
- Department of Biochemistry and Molecular Genetics, University of Illinois College of Medicine, Chicago, IL, USA
| | - Tohru Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA.
- Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, USA.
- Departments of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, Augusta, GA, USA.
| | - Masuko Ushio-Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA.
- Department of Medicine (Cardiology), Medical College of Georgia at Augusta University, Augusta, GA, USA.
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12
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Sudhahar V, Okur MN, O'Bryan JP, Minshall RD, Fulton D, Ushio-Fukai M, Fukai T. Caveolin-1 stabilizes ATP7A, a copper transporter for extracellular SOD, in vascular tissue to maintain endothelial function. Am J Physiol Cell Physiol 2020; 319:C933-C944. [PMID: 32936699 PMCID: PMC7789967 DOI: 10.1152/ajpcell.00151.2020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 09/08/2020] [Accepted: 09/08/2020] [Indexed: 12/31/2022]
Abstract
Caveolin-1 (Cav-1) is a scaffolding protein and a major component of caveolae/lipid rafts. Previous reports have shown that endothelial dysfunction in Cav-1-deficient (Cav-1-/-) mice is mediated by elevated oxidative stress through endothelial nitric oxide synthase (eNOS) uncoupling and increased NADPH oxidase. Oxidant stress is the net balance of oxidant generation and scavenging, and the role of Cav-1 as a regulator of antioxidant enzymes in vascular tissue is poorly understood. Extracellular SOD (SOD3) is a copper (Cu)-containing enzyme that is secreted from vascular smooth muscle cells/fibroblasts and subsequently binds to the endothelial cells surface, where it scavenges extracellular [Formula: see text] and preserves endothelial function. SOD3 activity is dependent on Cu, supplied by the Cu transporter ATP7A, but whether Cav-1 regulates the ATP7A-SOD3 axis and its role in oxidative stress-mediated vascular dysfunction has not been studied. Here we show that the activity of SOD3, but not SOD1, was significantly decreased in Cav-1-/- vessels, which was rescued by re-expression of Cav-1 or Cu supplementation. Loss of Cav-1 reduced ATP7A protein, but not mRNA, and this was mediated by ubiquitination of ATP7A and proteasomal degradation. ATP7A bound to Cav-1 and was colocalized with SOD3 in caveolae/lipid rafts or perinucleus in vascular tissues or cells. Impaired endothelium-dependent vasorelaxation in Cav-1-/- mice was rescued by gene transfer of SOD3 or by ATP7A-overexpressing transgenic mice. These data reveal an unexpected role of Cav-1 in stabilizing ATP7A protein expression by preventing its ubiquitination and proteasomal degradation, thereby increasing SOD3 activity, which in turn protects against vascular oxidative stress-mediated endothelial dysfunction.
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Affiliation(s)
- Varadarajan Sudhahar
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, Georgia
- Department of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, Augusta, Georgia
- Charlie Norwood Veterans Affairs Medical Center, Augusta, Georgia
| | - Mustafa Nazir Okur
- Laboratory of Molecular Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, Maryland
| | - John P O'Bryan
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Hollings Cancer Center, Medical University of South Carolina, Charleston, South Carolina
- Ralph H. Johnson Veterans Affairs Medical Center, Charleston, South Carolina
| | - Richard D Minshall
- Departments of Anesthesiology and Pharmacology, University of Illinois at Chicago, Chicago, Illinois
| | - David Fulton
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, Georgia
- Department of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Masuko Ushio-Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, Georgia
- Department of Medicine (Cardiology), Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Tohru Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, Georgia
- Department of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, Augusta, Georgia
- Charlie Norwood Veterans Affairs Medical Center, Augusta, Georgia
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13
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Kim YM, Youn SW, Sudhahar V, Das A, Chandhri R, Cuervo Grajal H, Kweon J, Leanhart S, He L, Toth PT, Kitajewski J, Rehman J, Yoon Y, Cho J, Fukai T, Ushio-Fukai M. Redox Regulation of Mitochondrial Fission Protein Drp1 by Protein Disulfide Isomerase Limits Endothelial Senescence. Cell Rep 2019; 23:3565-3578. [PMID: 29924999 PMCID: PMC6324937 DOI: 10.1016/j.celrep.2018.05.054] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 02/28/2018] [Accepted: 05/16/2018] [Indexed: 12/21/2022] Open
Abstract
Mitochondrial dynamics are tightly controlled by fusion and fission, and their dysregulation and excess reactive oxygen species (ROS) contribute to endothelial cell (EC) dysfunction. How redox signals regulate coupling between mitochondrial dynamics and endothelial (dys)function remains unknown. Here, we identify protein disulfide isomerase A1 (PDIA1) as a thiol reductase for the mitochondrial fission protein Drp1. A biotin-labeled Cys-OH trapping probe and rescue experiments reveal that PDIA1 depletion in ECs induces sulfenylation of Drp1 at Cys644, promoting mitochondrial fragmentation and ROS elevation without inducing ER stress, which drives EC senescence. Mechanistically, PDIA1 associates with Drp1 to reduce its redox status and activity. Defective wound healing and angiogenesis in diabetic or PDIA1+/- mice are restored by EC-targeted PDIA1 or the Cys oxidation-defective mutant Drp1. Thus, this study uncovers a molecular link between PDIA1 and Drp1 oxidoreduction, which maintains normal mitochondrial dynamics and limits endothelial senescence with potential translational implications for vascular diseases associated with diabetes or aging.
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Affiliation(s)
- Young-Mee Kim
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Seock-Won Youn
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Varadarajan Sudhahar
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA; Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, USA
| | - Archita Das
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Reyhaan Chandhri
- Department of Pharmacology, University of Illinois at Chicago, Chicago, IL, USA; Department of Physiology and Biophysics, University of Illinois at Chicago, Chicago, IL, USA; Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, IL, USA
| | - Henar Cuervo Grajal
- Department of Physiology and Biophysics, University of Illinois at Chicago, Chicago, IL, USA; Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, IL, USA
| | - Junghun Kweon
- Department of Pharmacology, University of Illinois at Chicago, Chicago, IL, USA
| | - Silvia Leanhart
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA; Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, USA
| | - Lianying He
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Peter T Toth
- Department of Pharmacology, University of Illinois at Chicago, Chicago, IL, USA
| | - Jan Kitajewski
- Department of Physiology and Biophysics, University of Illinois at Chicago, Chicago, IL, USA; Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, IL, USA
| | - Jalees Rehman
- Departments of Medicine (Cardiology) and Pharmacology, University of Illinois at Chicago, Chicago, IL, USA
| | - Yisang Yoon
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Jaehyung Cho
- Department of Pharmacology, University of Illinois at Chicago, Chicago, IL, USA
| | - Tohru Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA; Department of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, Augusta, GA, USA; Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, USA
| | - Masuko Ushio-Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA; Department of Medicine (Cardiology), Medical College of Georgia at Augusta University, Augusta, GA, USA.
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14
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Sudhahar V, Das A, Horimatsu T, Ash D, Leanhart S, Antipova O, Vogt S, Singla B, Csanyi G, White J, Kaplan JH, Fulton D, Weintraub NL, Kim HW, Ushio-Fukai M, Fukai T. Copper Transporter ATP7A (Copper-Transporting P-Type ATPase/Menkes ATPase) Limits Vascular Inflammation and Aortic Aneurysm Development: Role of MicroRNA-125b. Arterioscler Thromb Vasc Biol 2019; 39:2320-2337. [PMID: 31554420 DOI: 10.1161/atvbaha.119.313374] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Copper (Cu) is essential micronutrient, and its dysregulation is implicated in aortic aneurysm (AA) development. The Cu exporter ATP7A (copper-transporting P-type ATPase/Menkes ATPase) delivers Cu via the Cu chaperone Atox1 (antioxidant 1) to secretory Cu enzymes, such as lysyl oxidase, and excludes excess Cu. Lysyl oxidase is shown to protect against AA formation. However, the role and mechanism of ATP7A in AA pathogenesis remain unknown. Approach and Results: Here, we show that Cu chelator markedly inhibited Ang II (angiotensin II)-induced abdominal AA (AAA) in which ATP7A expression was markedly downregulated. Transgenic ATP7A overexpression prevented Ang II-induced AAA formation. Conversely, Cu transport dysfunctional ATP7Amut/+/ApoE-/- mice exhibited robust AAA formation and dissection, excess aortic Cu accumulation as assessed by X-ray fluorescence microscopy, and reduced lysyl oxidase activity. In contrast, AAA formation was not observed in Atox1-/-/ApoE-/- mice, suggesting that decreased lysyl oxidase activity, which depends on both ATP7A and Atox1, was not sufficient to develop AAA. Bone marrow transplantation suggested importance of ATP7A in vascular cells, not bone marrow cells, in AAA development. MicroRNA (miR) array identified miR-125b as a highly upregulated miR in AAA from ATP7Amut/+/ApoE-/- mice. Furthermore, miR-125b target genes (histone methyltransferase Suv39h1 and the NF-κB negative regulator TNFAIP3 [tumor necrosis factor alpha induced protein 3]) were downregulated, which resulted in increased proinflammatory cytokine expression, aortic macrophage recruitment, MMP (matrix metalloproteinase)-2/9 activity, elastin fragmentation, and vascular smooth muscle cell loss in ATP7Amut/+/ApoE-/- mice and reversed by locked nucleic acid-anti-miR-125b infusion. CONCLUSIONS ATP7A downregulation/dysfunction promotes AAA formation via upregulating miR-125b, which augments proinflammatory signaling in a Cu-dependent manner. Thus, ATP7A is a potential therapeutic target for inflammatory vascular disease.
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Affiliation(s)
- Varadarajan Sudhahar
- From the Vascular Biology Center (V.S., A.D., T.H., D.A., S.L., B.S., G.C., D.F., N.L.W., H.W.K., M.U.-F., T.F.), Medical College of Georgia at Augusta University, GA.,Department of Pharmacology and Toxicology (V.S., A.D., B.S., G.C., D.F., T.F.), Medical College of Georgia at Augusta University, GA.,Charlie Norwood Veterans Affairs Medical Center, Augusta, GA (V.S., S.L., T.F.)
| | - Archita Das
- From the Vascular Biology Center (V.S., A.D., T.H., D.A., S.L., B.S., G.C., D.F., N.L.W., H.W.K., M.U.-F., T.F.), Medical College of Georgia at Augusta University, GA.,Department of Pharmacology and Toxicology (V.S., A.D., B.S., G.C., D.F., T.F.), Medical College of Georgia at Augusta University, GA
| | - Tetsuo Horimatsu
- From the Vascular Biology Center (V.S., A.D., T.H., D.A., S.L., B.S., G.C., D.F., N.L.W., H.W.K., M.U.-F., T.F.), Medical College of Georgia at Augusta University, GA.,Department of Medicine (Cardiology) (T.H., D.A., N.L.W., H.W.K., M.U.-F.), Medical College of Georgia at Augusta University, GA
| | - Dipankar Ash
- From the Vascular Biology Center (V.S., A.D., T.H., D.A., S.L., B.S., G.C., D.F., N.L.W., H.W.K., M.U.-F., T.F.), Medical College of Georgia at Augusta University, GA.,Department of Medicine (Cardiology) (T.H., D.A., N.L.W., H.W.K., M.U.-F.), Medical College of Georgia at Augusta University, GA
| | - Silvia Leanhart
- From the Vascular Biology Center (V.S., A.D., T.H., D.A., S.L., B.S., G.C., D.F., N.L.W., H.W.K., M.U.-F., T.F.), Medical College of Georgia at Augusta University, GA.,Charlie Norwood Veterans Affairs Medical Center, Augusta, GA (V.S., S.L., T.F.)
| | - Olga Antipova
- X-ray Science Division, Argonne National Laboratory, IL (O.A., S.V.)
| | - Stefan Vogt
- X-ray Science Division, Argonne National Laboratory, IL (O.A., S.V.)
| | - Bhupesh Singla
- From the Vascular Biology Center (V.S., A.D., T.H., D.A., S.L., B.S., G.C., D.F., N.L.W., H.W.K., M.U.-F., T.F.), Medical College of Georgia at Augusta University, GA.,Department of Pharmacology and Toxicology (V.S., A.D., B.S., G.C., D.F., T.F.), Medical College of Georgia at Augusta University, GA
| | - Gabor Csanyi
- From the Vascular Biology Center (V.S., A.D., T.H., D.A., S.L., B.S., G.C., D.F., N.L.W., H.W.K., M.U.-F., T.F.), Medical College of Georgia at Augusta University, GA.,Department of Pharmacology and Toxicology (V.S., A.D., B.S., G.C., D.F., T.F.), Medical College of Georgia at Augusta University, GA
| | - Joseph White
- Department of Pathology (J.W.), Medical College of Georgia at Augusta University, GA
| | - Jack H Kaplan
- Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago (J.H.K.)
| | - David Fulton
- From the Vascular Biology Center (V.S., A.D., T.H., D.A., S.L., B.S., G.C., D.F., N.L.W., H.W.K., M.U.-F., T.F.), Medical College of Georgia at Augusta University, GA.,Department of Pharmacology and Toxicology (V.S., A.D., B.S., G.C., D.F., T.F.), Medical College of Georgia at Augusta University, GA
| | - Neal L Weintraub
- From the Vascular Biology Center (V.S., A.D., T.H., D.A., S.L., B.S., G.C., D.F., N.L.W., H.W.K., M.U.-F., T.F.), Medical College of Georgia at Augusta University, GA.,Department of Medicine (Cardiology) (T.H., D.A., N.L.W., H.W.K., M.U.-F.), Medical College of Georgia at Augusta University, GA
| | - Ha Won Kim
- From the Vascular Biology Center (V.S., A.D., T.H., D.A., S.L., B.S., G.C., D.F., N.L.W., H.W.K., M.U.-F., T.F.), Medical College of Georgia at Augusta University, GA.,Department of Medicine (Cardiology) (T.H., D.A., N.L.W., H.W.K., M.U.-F.), Medical College of Georgia at Augusta University, GA
| | - Masuko Ushio-Fukai
- From the Vascular Biology Center (V.S., A.D., T.H., D.A., S.L., B.S., G.C., D.F., N.L.W., H.W.K., M.U.-F., T.F.), Medical College of Georgia at Augusta University, GA.,Department of Medicine (Cardiology) (T.H., D.A., N.L.W., H.W.K., M.U.-F.), Medical College of Georgia at Augusta University, GA
| | - Tohru Fukai
- From the Vascular Biology Center (V.S., A.D., T.H., D.A., S.L., B.S., G.C., D.F., N.L.W., H.W.K., M.U.-F., T.F.), Medical College of Georgia at Augusta University, GA.,Department of Pharmacology and Toxicology (V.S., A.D., B.S., G.C., D.F., T.F.), Medical College of Georgia at Augusta University, GA.,Charlie Norwood Veterans Affairs Medical Center, Augusta, GA (V.S., S.L., T.F.)
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15
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Das A, Sudhahar V, Ushio-Fukai M, Fukai T. Novel interaction of antioxidant-1 with TRAF4: role in inflammatory responses in endothelial cells. Am J Physiol Cell Physiol 2019; 317:C1161-C1171. [PMID: 31553645 DOI: 10.1152/ajpcell.00264.2019] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
NADPH oxidase (NOX)-derived reactive oxygen species (ROS) and copper (Cu), an essential micronutrient, have been implicated in vascular inflammatory diseases. We reported that in proinflammatory cytokine TNF-α-stimulated endothelial cells (ECs), cytosolic Cu chaperone antioxidant-1 (Atox1) functions as a Cu-dependent transcription factor for the NOX organizer p47phox, thereby increasing ROS-dependent inflammatory gene expression. However, the role and mechanism of Atox1 nuclear translocation in inflamed ECs remain unclear. Using enface staining and nuclear fractionation, here we show that Atox1 was localized in the nucleus in inflamed aortas from ApoE-/- mice with angiotensin II infusion on a high-fat diet, while it was found in cytosol in those from control mice. In cultured human ECs, TNF-α stimulation promoted Atox1 nuclear translocation within 15 min, which was associated with Atox1 binding to TNF-α receptor-associated factor 4 (TRAF4) in a Cu-dependent manner. TRAF4 depletion by siRNA significantly inhibited Atox1 nuclear translocation, p47phox expression, and ROS production as well as its downstream VCAM1/ICAM1 expression and monocyte adhesion to inflamed ECs, which were rescued by overexpression of nuclear targeted Atox1. Furthermore, Atox1 colocalized with TRAF4 at the nucleus in TNF-α-stimulated inflamed ECs and vessels. In summary, Cu-dependent Atox1 binding to TRAF4 plays an important role in Atox1 nuclear translocation and ROS-dependent inflammatory responses in TNF-α-stimulated ECs. Thus the Atox1-TRAF4 axis is a novel therapeutic target for vascular inflammatory disease such as atherosclerosis.
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Affiliation(s)
- Archita Das
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, Georgia.,Departments of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Varadarajan Sudhahar
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, Georgia.,Departments of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, Augusta, Georgia.,Charlie Norwood Veterans Affairs Medical Center, Augusta, Georgia
| | - Masuko Ushio-Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, Georgia.,Department of Medicine (Cardiology), Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Tohru Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, Georgia.,Departments of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, Augusta, Georgia.,Charlie Norwood Veterans Affairs Medical Center, Augusta, Georgia
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16
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Abdelsaid K, Varadarajan S, Liu Y, Tang Y, Fukai T, Ushio‐Fukai M. Exercise Improves Exosome Function via Increasing Extracellular SOD and Cu transporter ATP7A to Restore the Impaired Angiogenesis in Type 2 Diabetic Mice. FASEB J 2019. [DOI: 10.1096/fasebj.2019.33.1_supplement.536.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kareem Abdelsaid
- Vascular Biology CenterMedical College of Georgia at Augusta UniversityAugustaGA
| | - Sudhahar Varadarajan
- Vascular Biology CenterMedical College of Georgia at Augusta UniversityAugustaGA
| | - Yutao Liu
- Cellular Biology and AnatomyMedical College of Georgia at Augusta UniversityAugustaGA
| | - Yaoliang Tang
- Vascular Biology CenterMedical College of Georgia at Augusta UniversityAugustaGA
| | - Tohru Fukai
- Vascular Biology CenterMedical College of Georgia at Augusta UniversityAugustaGA
| | - Masuko Ushio‐Fukai
- Vascular Biology CenterMedical College of Georgia at Augusta UniversityAugustaGA
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17
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Yang Q, Xu J, Ma Q, Liu Z, Sudhahar V, Cao Y, Wang L, Zeng X, Zhou Y, Zhang M, Xu Y, Wang Y, Weintraub NL, Zhang C, Fukai T, Wu C, Huang L, Han Z, Wang T, Fulton DJ, Hong M, Huo Y. PRKAA1/AMPKα1-driven glycolysis in endothelial cells exposed to disturbed flow protects against atherosclerosis. Nat Commun 2018; 9:4667. [PMID: 30405100 PMCID: PMC6220207 DOI: 10.1038/s41467-018-07132-x] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 10/15/2018] [Indexed: 12/25/2022] Open
Abstract
Increased aerobic glycolysis in endothelial cells of atheroprone areas of blood vessels has been hypothesized to drive increased inflammation and lesion burden but direct links remain to be established. Here we show that endothelial cells exposed to disturbed flow in vivo and in vitro exhibit increased levels of protein kinase AMP-activated (PRKA)/AMP-activated protein kinases (AMPKs). Selective deletion of endothelial Prkaa1, coding for protein kinase AMP-activated catalytic subunit alpha1, reduces glycolysis, compromises endothelial cell proliferation, and accelerates the formation of atherosclerotic lesions in hyperlipidemic mice. Rescue of the impaired glycolysis in Prkaa1-deficient endothelial cells through Slc2a1 overexpression enhances endothelial cell viability and integrity of the endothelial cell barrier, and reverses susceptibility to atherosclerosis. In human endothelial cells, PRKAA1 is upregulated by disturbed flow, and silencing PRKAA1 reduces glycolysis and endothelial viability. Collectively, these results suggest that increased glycolysis in the endothelium of atheroprone arteries is a protective mechanism.
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Affiliation(s)
- Qiuhua Yang
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, 518055, Shenzhen, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Jiean Xu
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, 518055, Shenzhen, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Qian Ma
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, 518055, Shenzhen, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Zhiping Liu
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, 518055, Shenzhen, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Varadarajan Sudhahar
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Yapeng Cao
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, 518055, Shenzhen, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Lina Wang
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, 518055, Shenzhen, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Xianqiu Zeng
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, 518055, Shenzhen, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Yaqi Zhou
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, 518055, Shenzhen, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Min Zhang
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Yiming Xu
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
- School of Basic Medical Sciences, Guangzhou Medical University, 511436, Guangzhou, China
| | - Yong Wang
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
- College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, 610075, Chengdu, China
| | - Neal L Weintraub
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Chunxiang Zhang
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Tohru Fukai
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Chaodong Wu
- Department of Nutrition and Food Science, Texas A&M University, College Station, TX, 77840, USA
| | - Lei Huang
- Department of Cardiovascular Surgery, Peking University Shenzhen Hospital, 518036, Shenzhen, China
| | - Zhen Han
- Department of Cardiovascular Surgery, Peking University Shenzhen Hospital, 518036, Shenzhen, China
| | - Tao Wang
- Department of Cardiovascular Surgery, Peking University Shenzhen Hospital, 518036, Shenzhen, China
| | - David J Fulton
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Mei Hong
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, 518055, Shenzhen, China.
| | - Yuqing Huo
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA.
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18
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Ashino T, Kohno T, Sudhahar V, Ash D, Ushio-Fukai M, Fukai T. Copper transporter ATP7A interacts with IQGAP1, a Rac1 binding scaffolding protein: role in PDGF-induced VSMC migration and vascular remodeling. Am J Physiol Cell Physiol 2018; 315:C850-C862. [PMID: 30257103 DOI: 10.1152/ajpcell.00230.2018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Vascular smooth muscle cell (VSMC) migration contributes to neointimal formation after vascular injury. We previously demonstrated that copper (Cu) transporter ATP7A is involved in platelet-derived growth factor (PDGF)-induced VSMC migration in a Cu- and Rac1-dependent manner. The underlying mechanism is still unknown. Here we show that ATP7A interacts with IQGAP1, a Rac1 and receptor tyrosine kinase binding scaffolding proteins, which mediates PDGF-induced VSMC migration and vascular remodeling. In cultured rat aortic SMCs, PDGF stimulation rapidly promoted ATP7A association with IQGAP1 and Rac1 and their translocation to the lipid rafts and leading edge. Cotransfection assay revealed that ATP7A directly bound to NH2-terminal domain of IQGAP1. Functionally, either ATP7A or IQGAP1 depletion using siRNA significantly inhibited PDGF-induced VSMC migration without additive effects, suggesting that IQGAP1 and ATP7A are in the same axis to promote migration. Furthermore, IQGAP1 siRNA blocked PDGF-induced ATP7A association with Rac1 as well as its translocation to leading edge, while PDGF-induced IQGAP1 translocation was not affected by ATP7A siRNA or Cu chelator. Overexpression of mutant IQGAP1 lacking a Rac1 binding site prevented PDGF-induced translocation of Rac1, but not ATP7A, to the leading edge, thereby inhibiting lamellipodia formation and VSMC migration. In vivo, ATP7A colocalized with IQGAP1 at neointimal VSMCs in a mice wire injury model, while neointimal formation and extracellular matrix deposition induced by vascular injury were inhibited in ATP7A mutant mice with reduced Cu transporter function. In summary, IQGAP1 functions as ATP7A and Rac1 binding scaffolding protein to organize PDGF-dependent ATP7A translocation to the lamellipodial leading edge, thereby promoting VSMC migration and vascular remodeling.
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Affiliation(s)
- Takashi Ashino
- Departments of Medicine (Section of Cardiology) and Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago , Chicago, Illinois.,Division of Toxicology, Department of Pharmacology, Toxicology and Therapeutics, Showa University School of Pharmacy , Tokyo , Japan
| | - Takashi Kohno
- Departments of Medicine (Section of Cardiology) and Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago , Chicago, Illinois.,Division of Cardiology, Department of Medicine, Keio University School of Medicine, Shinjuku-ku, Tokyo , Japan
| | - Varadarajan Sudhahar
- Departments of Medicine (Section of Cardiology) and Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago , Chicago, Illinois.,Vascular Biology Center, Departments of Pharmacology and Toxicology, Medical College of Georgia at Augusta University , Augusta, Georgia.,Charlie Norwood Veterans Affairs Medical Center , Augusta, Georgia
| | - Dipankar Ash
- Vascular Biology Center, Departments of Medicine (Cardiology), Medical College of Georgia at Augusta University , Augusta, Georgia
| | - Masuko Ushio-Fukai
- Vascular Biology Center, Departments of Medicine (Cardiology), Medical College of Georgia at Augusta University , Augusta, Georgia
| | - Tohru Fukai
- Departments of Medicine (Section of Cardiology) and Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago , Chicago, Illinois.,Vascular Biology Center, Departments of Pharmacology and Toxicology, Medical College of Georgia at Augusta University , Augusta, Georgia.,Charlie Norwood Veterans Affairs Medical Center , Augusta, Georgia
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19
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Fang MM, Barman PK, Thiruppathi M, Mirza RE, McKinney RD, Deng J, Christman JW, Du X, Fukai T, Ennis WJ, Koh TJ, Ushio-Fukai M, Urao N. Oxidant Signaling Mediated by Nox2 in Neutrophils Promotes Regenerative Myelopoiesis and Tissue Recovery following Ischemic Damage. J Immunol 2018; 201:2414-2426. [PMID: 30201810 DOI: 10.4049/jimmunol.1800252] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 08/06/2018] [Indexed: 01/09/2023]
Abstract
Ischemic tissue damage activates hematopoietic stem and progenitor cells (HSPCs) in the bone marrow (BM)-generating myeloid cells, and persistent HSPC activity may drive chronic inflammation and impair tissue recovery. Although increased reactive oxygen species in the BM regulate HSPC functions, their roles in myelopoiesis of activated HSPCs and subsequent tissue recovery during ischemic damage are not well understood. In this paper, we report that deletion of Nox2 NADPH oxidase in mice results in persistent elevations in BM HSPC activity and levels of inflammatory monocytes/macrophages in BM and ischemic tissue in a model of hindlimb ischemia. Ischemic tissue damage induces oxidants in BM such as elevations of hydrogen peroxide and oxidized phospholipids, which activate redox-sensitive Lyn kinase in a Nox2-dependent manner. Moreover, during tissue recovery after ischemic injury, this Nox2-ROS-Lyn kinase axis is induced by Nox2 in neutrophils that home to the BM, which inhibits HSPC activity and inflammatory monocyte generation and promotes tissue regeneration after ischemic damage. Thus, oxidant signaling in the BM mediated by Nox2 in neutrophils regulates myelopoiesis of HSPCs to promote regeneration of damaged tissue.
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Affiliation(s)
- Milie M Fang
- Center for Wound Healing and Tissue Regeneration, Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612
| | - Pijus K Barman
- Center for Wound Healing and Tissue Regeneration, Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612
| | - Muthusamy Thiruppathi
- Center for Wound Healing and Tissue Regeneration, Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612
| | - Rita E Mirza
- Center for Wound Healing and Tissue Regeneration, Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612
| | - Ronald D McKinney
- Department of Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago College of Medicine, Chicago, IL 60612
| | - Jing Deng
- Department of Medicine, Ohio State University School of Medicine, Columbus, OH 43210.,Department of Medicine, University of Illinois at Chicago College of Medicine, Chicago, IL 60612
| | - John W Christman
- Department of Medicine, Ohio State University School of Medicine, Columbus, OH 43210.,Department of Medicine, University of Illinois at Chicago College of Medicine, Chicago, IL 60612
| | - Xiaoping Du
- Department of Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago College of Medicine, Chicago, IL 60612
| | - Tohru Fukai
- Vascular Biology Center, Department of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, Augusta, GA 30912.,Charlie Norwood Veterans Affairs Medical Center, Augusta, GA 30904
| | - William J Ennis
- Department of Surgery, University of Illinois at Chicago College of Medicine, Chicago, IL 60612; and
| | - Timothy J Koh
- Center for Wound Healing and Tissue Regeneration, Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612
| | - Masuko Ushio-Fukai
- Vascular Biology Center, Department of Medicine (Cardiology), Medical College of Georgia at Augusta University, Augusta, GA 30912
| | - Norifumi Urao
- Center for Wound Healing and Tissue Regeneration, Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612; .,Department of Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago College of Medicine, Chicago, IL 60612
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20
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Abstract
Copper (Cu) is an essential micronutrient but excess Cu is potentially toxic. Its important propensity to cycle between two oxidation states accounts for its frequent presence as a cofactor in many physiological processes through Cu-containing enzymes, including mitochondrial energy production (via cytochrome c-oxidase), protection against oxidative stress (via superoxide dismutase), and extracellular matrix stability (via lysyl oxidase). Since free Cu is potentially toxic, the bioavailability of intracellular Cu is tightly controlled by Cu transporters and Cu chaperones. Recent evidence reveals that these Cu transport systems play an essential role in the physiological responses of cardiovascular cells, including cell growth, migration, angiogenesis and wound repair. In response to growth factors, cytokines, and hypoxia, their expression, subcellular localization, and function are tightly regulated. Cu transport systems and their regulators have also been linked to various cardiovascular pathophysiologies such as hypertension, inflammation, atherosclerosis, diabetes, cardiac hypertrophy, and cardiomyopathy. A greater appreciation of the central importance of Cu transporters and Cu chaperones in cell signaling and gene expression in cardiovascular biology offers the possibility of identifying new therapeutic targets for cardiovascular disease.
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Affiliation(s)
- Tohru Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University , Augusta, Georgia.,Departments of Pharmacology and Toxicology, Medical College of Georgia at Augusta University , Augusta, Georgia.,Charlie Norwood Veterans Affairs Medical Center , Augusta Georgia
| | - Masuko Ushio-Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University , Augusta, Georgia.,Department of Medicine (Cardiology), Medical College of Georgia at Augusta University , Augusta, Georgia
| | - Jack H Kaplan
- Department of Biochemistry and Molecular Genetics, University of Illinois College of Medicine , Chicago, Illinois
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21
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Yang Q, Xu J, Liu Z, Sudhahar V, Ma Q, Cao Y, Wang L, Zeng X, Zhou Y, Zhang M, Xu Y, Wang Y, Weintraub N, Zhang C, Fukai T, Wu C, Hong M, David F, Huo Y. Abstract 461: Enhanced Glycolysis in Endothelial Cells Protects Against Atherosclerosis. Arterioscler Thromb Vasc Biol 2018. [DOI: 10.1161/atvb.38.suppl_1.461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background:
Increased aerobic glycolysis in endothelial cells (ECs) of atheroprone areas of blood vessels is hypothesized to drive increased inflammation and lesion burden but the direct links are not yet established. The goal of this study was to determine how metabolic adaptation in ECs impacts atherosclerosis.
Methods:
The immunostaining, Real-time PCR, Western blots, Seahorse assayes are used to analyze the expression and activity of PRKA/AMPKs and metabolic glycolysis in the arterial endothelium of mice and cultured endothelial cells under disturbed flows. Staining of Edu, TUNNEL and Evans blue were utilized to evaluate endothelial turnover and endothelium integrity. Oil Red O staining and histological cellular characterization were performed to evaluate atherosclerosis.
Results:
ECs exposed to disturbed flow in vivo and in vitro exhibit increased levels of PRKA/AMPKs (protein kinase AMP-activated; AMP-activated protein kinases) and glycolysis. Selective deletion of endothelial Prkaa1 (protein kinase AMP-activated catalytic subunit alpha1) reduced glycolysis, compromised EC proliferation and EC monolayer integrity, and accelerated the formation of atherosclerotic lesions in hyperlipidemic mice. Rescue of impaired glycolysis in Prkaa1-deficient ECs through Slc2a1 transfection enhanced EC viability and integrity of the EC barrier and reversed susceptibility to atherosclerosis. These results suggest that increased glycolysis in the endothelium of atheroprone arteries is a protective mechanism.
Conclusions:
Endothelial glycolysis plays a vital role in EC proliferation, repair of the EC monolayer, and protects mice from atherosclerosis. Thus, approaches such as activating AMPK activity or increasing endothelial glycolysis are preventive and therapeutic for arterial diseases.
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Affiliation(s)
| | | | | | | | - Qian Ma
- Peking Univ, Shenzhen, China
| | | | | | | | | | | | - Yiming Xu
- Guangzhou Med Univ, Guangzhou, China
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22
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Sudhahar V, Okur MN, Bagi Z, O'Bryan JP, Hay N, Makino A, Patel VS, Phillips SA, Stepp D, Ushio-Fukai M, Fukai T. Akt2 (Protein Kinase B Beta) Stabilizes ATP7A, a Copper Transporter for Extracellular Superoxide Dismutase, in Vascular Smooth Muscle: Novel Mechanism to Limit Endothelial Dysfunction in Type 2 Diabetes Mellitus. Arterioscler Thromb Vasc Biol 2018; 38:529-541. [PMID: 29301787 DOI: 10.1161/atvbaha.117.309819] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2017] [Accepted: 12/26/2017] [Indexed: 12/22/2022]
Abstract
OBJECTIVE Copper transporter ATP7A (copper-transporting/ATPase) is required for full activation of SOD3 (extracellular superoxide dismutase), which is secreted from vascular smooth muscle cells (VSMCs) and anchors to endothelial cell surface to preserve endothelial function by scavenging extracellular superoxide. We reported that ATP7A protein expression and SOD3 activity are decreased in insulin-deficient type 1 diabetes mellitus vessels, thereby, inducing superoxide-mediated endothelial dysfunction, which are rescued by insulin treatment. However, it is unknown regarding the mechanism by which insulin increases ATP7A expression in VSMCs and whether ATP7A downregulation is observed in T2DM (type2 diabetes mellitus) mice and human in which insulin-Akt (protein kinase B) pathway is selectively impaired. APPROACH AND RESULTS Here we show that ATP7A protein is markedly downregulated in vessels isolated from T2DM patients, as well as those from high-fat diet-induced or db/db T2DM mice. Akt2 (protein kinase B beta) activated by insulin promotes ATP7A stabilization via preventing ubiquitination/degradation as well as translocation to plasma membrane in VSMCs, which contributes to activation of SOD3 that protects against T2DM-induced endothelial dysfunction. Downregulation of ATP7A in T2DM vessels is restored by constitutive active Akt or PTP1B-/- (protein-tyrosine phosphatase 1B-deficient) T2DM mice, which enhance insulin-Akt signaling. Immunoprecipitation, in vitro kinase assay, and mass spectrometry analysis reveal that insulin stimulates Akt2 binding to ATP7A to induce phosphorylation at Ser1424/1463/1466. Furthermore, SOD3 activity is reduced in Akt2-/- vessels or VSMCs, which is rescued by ATP7A overexpression. CONCLUSION Akt2 plays a critical role in ATP7A protein stabilization and translocation to plasma membrane in VSMCs, which contributes to full activation of vascular SOD3 that protects against endothelial dysfunction in T2DM.
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Affiliation(s)
- Varadarajan Sudhahar
- From the Vascular Biology Center (V.S., Z.B., D.S., M.U.-F., T.F.), Department of Pharmacology and Toxicology (V.S., T.F.), Department of Medicine (Cardiology) (Z.B., M.U.-F.), and Department of Surgery (V.S.P.), Medical College of Georgia at Augusta University; Departments of Medicine (Cardiology) and Pharmacology (V.S., T.F.), Department of Pharmacology (M.N.O., J.P.O., M.U.-F.), Center for Cardiovascular Research (V.S., J.P.O., M.U.-F., T.F.), Department of Physical Therapy (S.A.P.), and Department of Biochemistry and Molecular Genetics (N.H.), University of Illinois at Chicago; Department of Medicine and Physiology, University of Arizona, Tucson (A.M.), Jesse Brown Veterans Affairs Medical Center, Chicago, IL (V.S., T.F.); and Charlie Norwood Veterans Affairs Medical Center, Augusta, GA (V.S., T.F.)
| | - Mustafa Nazir Okur
- From the Vascular Biology Center (V.S., Z.B., D.S., M.U.-F., T.F.), Department of Pharmacology and Toxicology (V.S., T.F.), Department of Medicine (Cardiology) (Z.B., M.U.-F.), and Department of Surgery (V.S.P.), Medical College of Georgia at Augusta University; Departments of Medicine (Cardiology) and Pharmacology (V.S., T.F.), Department of Pharmacology (M.N.O., J.P.O., M.U.-F.), Center for Cardiovascular Research (V.S., J.P.O., M.U.-F., T.F.), Department of Physical Therapy (S.A.P.), and Department of Biochemistry and Molecular Genetics (N.H.), University of Illinois at Chicago; Department of Medicine and Physiology, University of Arizona, Tucson (A.M.), Jesse Brown Veterans Affairs Medical Center, Chicago, IL (V.S., T.F.); and Charlie Norwood Veterans Affairs Medical Center, Augusta, GA (V.S., T.F.)
| | - Zsolt Bagi
- From the Vascular Biology Center (V.S., Z.B., D.S., M.U.-F., T.F.), Department of Pharmacology and Toxicology (V.S., T.F.), Department of Medicine (Cardiology) (Z.B., M.U.-F.), and Department of Surgery (V.S.P.), Medical College of Georgia at Augusta University; Departments of Medicine (Cardiology) and Pharmacology (V.S., T.F.), Department of Pharmacology (M.N.O., J.P.O., M.U.-F.), Center for Cardiovascular Research (V.S., J.P.O., M.U.-F., T.F.), Department of Physical Therapy (S.A.P.), and Department of Biochemistry and Molecular Genetics (N.H.), University of Illinois at Chicago; Department of Medicine and Physiology, University of Arizona, Tucson (A.M.), Jesse Brown Veterans Affairs Medical Center, Chicago, IL (V.S., T.F.); and Charlie Norwood Veterans Affairs Medical Center, Augusta, GA (V.S., T.F.)
| | - John P O'Bryan
- From the Vascular Biology Center (V.S., Z.B., D.S., M.U.-F., T.F.), Department of Pharmacology and Toxicology (V.S., T.F.), Department of Medicine (Cardiology) (Z.B., M.U.-F.), and Department of Surgery (V.S.P.), Medical College of Georgia at Augusta University; Departments of Medicine (Cardiology) and Pharmacology (V.S., T.F.), Department of Pharmacology (M.N.O., J.P.O., M.U.-F.), Center for Cardiovascular Research (V.S., J.P.O., M.U.-F., T.F.), Department of Physical Therapy (S.A.P.), and Department of Biochemistry and Molecular Genetics (N.H.), University of Illinois at Chicago; Department of Medicine and Physiology, University of Arizona, Tucson (A.M.), Jesse Brown Veterans Affairs Medical Center, Chicago, IL (V.S., T.F.); and Charlie Norwood Veterans Affairs Medical Center, Augusta, GA (V.S., T.F.)
| | - Nissim Hay
- From the Vascular Biology Center (V.S., Z.B., D.S., M.U.-F., T.F.), Department of Pharmacology and Toxicology (V.S., T.F.), Department of Medicine (Cardiology) (Z.B., M.U.-F.), and Department of Surgery (V.S.P.), Medical College of Georgia at Augusta University; Departments of Medicine (Cardiology) and Pharmacology (V.S., T.F.), Department of Pharmacology (M.N.O., J.P.O., M.U.-F.), Center for Cardiovascular Research (V.S., J.P.O., M.U.-F., T.F.), Department of Physical Therapy (S.A.P.), and Department of Biochemistry and Molecular Genetics (N.H.), University of Illinois at Chicago; Department of Medicine and Physiology, University of Arizona, Tucson (A.M.), Jesse Brown Veterans Affairs Medical Center, Chicago, IL (V.S., T.F.); and Charlie Norwood Veterans Affairs Medical Center, Augusta, GA (V.S., T.F.)
| | - Ayako Makino
- From the Vascular Biology Center (V.S., Z.B., D.S., M.U.-F., T.F.), Department of Pharmacology and Toxicology (V.S., T.F.), Department of Medicine (Cardiology) (Z.B., M.U.-F.), and Department of Surgery (V.S.P.), Medical College of Georgia at Augusta University; Departments of Medicine (Cardiology) and Pharmacology (V.S., T.F.), Department of Pharmacology (M.N.O., J.P.O., M.U.-F.), Center for Cardiovascular Research (V.S., J.P.O., M.U.-F., T.F.), Department of Physical Therapy (S.A.P.), and Department of Biochemistry and Molecular Genetics (N.H.), University of Illinois at Chicago; Department of Medicine and Physiology, University of Arizona, Tucson (A.M.), Jesse Brown Veterans Affairs Medical Center, Chicago, IL (V.S., T.F.); and Charlie Norwood Veterans Affairs Medical Center, Augusta, GA (V.S., T.F.)
| | - Vijay S Patel
- From the Vascular Biology Center (V.S., Z.B., D.S., M.U.-F., T.F.), Department of Pharmacology and Toxicology (V.S., T.F.), Department of Medicine (Cardiology) (Z.B., M.U.-F.), and Department of Surgery (V.S.P.), Medical College of Georgia at Augusta University; Departments of Medicine (Cardiology) and Pharmacology (V.S., T.F.), Department of Pharmacology (M.N.O., J.P.O., M.U.-F.), Center for Cardiovascular Research (V.S., J.P.O., M.U.-F., T.F.), Department of Physical Therapy (S.A.P.), and Department of Biochemistry and Molecular Genetics (N.H.), University of Illinois at Chicago; Department of Medicine and Physiology, University of Arizona, Tucson (A.M.), Jesse Brown Veterans Affairs Medical Center, Chicago, IL (V.S., T.F.); and Charlie Norwood Veterans Affairs Medical Center, Augusta, GA (V.S., T.F.)
| | - Shane A Phillips
- From the Vascular Biology Center (V.S., Z.B., D.S., M.U.-F., T.F.), Department of Pharmacology and Toxicology (V.S., T.F.), Department of Medicine (Cardiology) (Z.B., M.U.-F.), and Department of Surgery (V.S.P.), Medical College of Georgia at Augusta University; Departments of Medicine (Cardiology) and Pharmacology (V.S., T.F.), Department of Pharmacology (M.N.O., J.P.O., M.U.-F.), Center for Cardiovascular Research (V.S., J.P.O., M.U.-F., T.F.), Department of Physical Therapy (S.A.P.), and Department of Biochemistry and Molecular Genetics (N.H.), University of Illinois at Chicago; Department of Medicine and Physiology, University of Arizona, Tucson (A.M.), Jesse Brown Veterans Affairs Medical Center, Chicago, IL (V.S., T.F.); and Charlie Norwood Veterans Affairs Medical Center, Augusta, GA (V.S., T.F.)
| | - David Stepp
- From the Vascular Biology Center (V.S., Z.B., D.S., M.U.-F., T.F.), Department of Pharmacology and Toxicology (V.S., T.F.), Department of Medicine (Cardiology) (Z.B., M.U.-F.), and Department of Surgery (V.S.P.), Medical College of Georgia at Augusta University; Departments of Medicine (Cardiology) and Pharmacology (V.S., T.F.), Department of Pharmacology (M.N.O., J.P.O., M.U.-F.), Center for Cardiovascular Research (V.S., J.P.O., M.U.-F., T.F.), Department of Physical Therapy (S.A.P.), and Department of Biochemistry and Molecular Genetics (N.H.), University of Illinois at Chicago; Department of Medicine and Physiology, University of Arizona, Tucson (A.M.), Jesse Brown Veterans Affairs Medical Center, Chicago, IL (V.S., T.F.); and Charlie Norwood Veterans Affairs Medical Center, Augusta, GA (V.S., T.F.)
| | - Masuko Ushio-Fukai
- From the Vascular Biology Center (V.S., Z.B., D.S., M.U.-F., T.F.), Department of Pharmacology and Toxicology (V.S., T.F.), Department of Medicine (Cardiology) (Z.B., M.U.-F.), and Department of Surgery (V.S.P.), Medical College of Georgia at Augusta University; Departments of Medicine (Cardiology) and Pharmacology (V.S., T.F.), Department of Pharmacology (M.N.O., J.P.O., M.U.-F.), Center for Cardiovascular Research (V.S., J.P.O., M.U.-F., T.F.), Department of Physical Therapy (S.A.P.), and Department of Biochemistry and Molecular Genetics (N.H.), University of Illinois at Chicago; Department of Medicine and Physiology, University of Arizona, Tucson (A.M.), Jesse Brown Veterans Affairs Medical Center, Chicago, IL (V.S., T.F.); and Charlie Norwood Veterans Affairs Medical Center, Augusta, GA (V.S., T.F.)
| | - Tohru Fukai
- From the Vascular Biology Center (V.S., Z.B., D.S., M.U.-F., T.F.), Department of Pharmacology and Toxicology (V.S., T.F.), Department of Medicine (Cardiology) (Z.B., M.U.-F.), and Department of Surgery (V.S.P.), Medical College of Georgia at Augusta University; Departments of Medicine (Cardiology) and Pharmacology (V.S., T.F.), Department of Pharmacology (M.N.O., J.P.O., M.U.-F.), Center for Cardiovascular Research (V.S., J.P.O., M.U.-F., T.F.), Department of Physical Therapy (S.A.P.), and Department of Biochemistry and Molecular Genetics (N.H.), University of Illinois at Chicago; Department of Medicine and Physiology, University of Arizona, Tucson (A.M.), Jesse Brown Veterans Affairs Medical Center, Chicago, IL (V.S., T.F.); and Charlie Norwood Veterans Affairs Medical Center, Augusta, GA (V.S., T.F.).
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23
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Kim YM, Kim SJ, Tatsunami R, Yamamura H, Fukai T, Ushio-Fukai M. ROS-induced ROS release orchestrated by Nox4, Nox2, and mitochondria in VEGF signaling and angiogenesis. Am J Physiol Cell Physiol 2017; 312:C749-C764. [PMID: 28424170 DOI: 10.1152/ajpcell.00346.2016] [Citation(s) in RCA: 156] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 04/10/2017] [Accepted: 04/10/2017] [Indexed: 01/07/2023]
Abstract
Reactive oxygen species (ROS) derived from NADPH oxidase (NOX) and mitochondria play a critical role in growth factor-induced switch from a quiescent to an angiogenic phenotype in endothelial cells (ECs). However, how highly diffusible ROS produced from different sources can coordinate to stimulate VEGF signaling and drive the angiogenic process remains unknown. Using the cytosol- and mitochondria-targeted redox-sensitive RoGFP biosensors with real-time imaging, here we show that VEGF stimulation in human ECs rapidly increases cytosolic RoGFP oxidation within 1 min, followed by mitochondrial RoGFP oxidation within 5 min, which continues at least for 60 min. Silencing of Nox4 or Nox2 or overexpression of mitochondria-targeted catalase significantly inhibits VEGF-induced tyrosine phosphorylation of VEGF receptor type 2 (VEGFR2-pY), EC migration and proliferation at the similar extent. Exogenous hydrogen peroxide (H2O2) or overexpression of Nox4, which produces H2O2, increases mitochondrial ROS (mtROS), which is prevented by Nox2 siRNA, suggesting that Nox2 senses Nox4-derived H2O2 to promote mtROS production. Mechanistically, H2O2 increases S36 phosphorylation of p66Shc, a key mtROS regulator, which is inhibited by siNox2, but not by siNox4. Moreover, Nox2 or Nox4 knockdown or overexpression of S36 phosphorylation-defective mutant p66Shc(S36A) inhibits VEGF-induced mtROS, VEGFR2-pY, EC migration, and proliferation. In summary, Nox4-derived H2O2 in part activates Nox2 to increase mtROS via pSer36-p66Shc, thereby enhancing VEGFR2 signaling and angiogenesis in ECs. This may represent a novel feed-forward mechanism of ROS-induced ROS release orchestrated by the Nox4/Nox2/pSer36-p66Shc/mtROS axis, which drives sustained activation of angiogenesis signaling program.
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Affiliation(s)
- Young-Mee Kim
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, Georgia.,Departments of Medicine (Cardiology) and Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois
| | - Seok-Jo Kim
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois.,Department of Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois
| | - Ryosuke Tatsunami
- School of Pharmacy, Hokkaido Pharmaceutical University, Hokkaido, Japan; and.,Department of Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois
| | - Hisao Yamamura
- Department of Molecular and Cellular Pharmacology, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
| | - Tohru Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, Georgia.,Departments of Medicine (Cardiology) and Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois
| | - Masuko Ushio-Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, Georgia; .,Department of Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois
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24
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Robinson AT, Fancher IS, Sudhahar V, Bian JT, Cook MD, Mahmoud AM, Ali MM, Ushio-Fukai M, Brown MD, Fukai T, Phillips SA. Short-term regular aerobic exercise reduces oxidative stress produced by acute in the adipose microvasculature. Am J Physiol Heart Circ Physiol 2017; 312:H896-H906. [PMID: 28235790 DOI: 10.1152/ajpheart.00684.2016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 02/01/2017] [Accepted: 02/17/2017] [Indexed: 01/04/2023]
Abstract
High blood pressure has been shown to elicit impaired dilation in the vasculature. The purpose of this investigation was to elucidate the mechanisms through which high pressure may elicit vascular dysfunction and determine the mechanisms through which regular aerobic exercise protects arteries against high pressure. Male C57BL/6J mice were subjected to 2 wk of voluntary running (~6 km/day) for comparison with sedentary controls. Hindlimb adipose resistance arteries were dissected from mice for measurements of flow-induced dilation (FID; with or without high intraluminal pressure exposure) or protein expression of NADPH oxidase II (NOX II) and superoxide dismutase (SOD). Microvascular endothelial cells were subjected to high physiological laminar shear stress (20 dyn/cm2) or static condition and treated with ANG II + pharmacological inhibitors. Cells were analyzed for the detection of ROS or collected for Western blot determination of NOX II and SOD. Resistance arteries from exercised mice demonstrated preserved FID after high pressure exposure, whereas FID was impaired in control mouse arteries. Inhibition of ANG II or NOX II restored impaired FID in control mouse arteries. High pressure increased superoxide levels in control mouse arteries but not in exercise mouse arteries, which exhibited greater ability to convert superoxide to H2O2 Arteries from exercised mice exhibited less NOX II protein expression, more SOD isoform expression, and less sensitivity to ANG II. Endothelial cells subjected to laminar shear stress exhibited less NOX II subunit expression. In conclusion, aerobic exercise prevents high pressure-induced vascular dysfunction through an improved redox environment in the adipose microvasculature.NEW & NOTEWORTHY We describe potential mechanisms contributing to aerobic exercise-conferred protection against high intravascular pressure. Subcutaneous adipose microvessels from exercise mice express less NADPH oxidase (NOX) II and more superoxide dismutase (SOD) and demonstrate less sensitivity to ANG II. In microvascular endothelial cells, shear stress reduced NOX II but did not influence SOD expression.
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Affiliation(s)
- Austin T Robinson
- Department of Physical Therapy, University of Illinois at Chicago, Chicago, Illinois; .,Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois.,Integrative Physiology Laboratory, University of Illinois at Chicago, Chicago, Illinois
| | - Ibra S Fancher
- Department of Physical Therapy, University of Illinois at Chicago, Chicago, Illinois.,Division of Pulmonary, Critical Care, Sleep, and Allergy, Department of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Varadarajan Sudhahar
- Departments of Medicine (Section of Cardiology) and Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois.,Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois
| | - Jing Tan Bian
- Department of Physical Therapy, University of Illinois at Chicago, Chicago, Illinois
| | - Marc D Cook
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois.,Integrative Physiology Laboratory, University of Illinois at Chicago, Chicago, Illinois
| | - Abeer M Mahmoud
- Department of Physical Therapy, University of Illinois at Chicago, Chicago, Illinois.,Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois.,Integrative Physiology Laboratory, University of Illinois at Chicago, Chicago, Illinois
| | - Mohamed M Ali
- Department of Physical Therapy, University of Illinois at Chicago, Chicago, Illinois.,Integrative Physiology Laboratory, University of Illinois at Chicago, Chicago, Illinois
| | - Masuko Ushio-Fukai
- Departments of Medicine (Section of Cardiology) and Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois
| | - Michael D Brown
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois.,Integrative Physiology Laboratory, University of Illinois at Chicago, Chicago, Illinois
| | - Tohru Fukai
- Departments of Medicine (Section of Cardiology) and Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois.,Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois
| | - Shane A Phillips
- Department of Physical Therapy, University of Illinois at Chicago, Chicago, Illinois; .,Integrative Physiology Laboratory, University of Illinois at Chicago, Chicago, Illinois.,Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, University of Illinois at Chicago, Chicago, Illinois; and
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25
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Fukai T. Mouse Specific Cleavage-Resistant RAGE Splice Variant. PLoS One 2016; 11:e0162120. [PMID: 27653772 PMCID: PMC5031468 DOI: 10.1371/journal.pone.0162120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 08/09/2016] [Indexed: 11/23/2022] Open
Affiliation(s)
- Tohru Fukai
- Depts. of Medicine (Section of Cardiololgy) and Pharmacology, University of Illinois at Chicago, Chicago, Illinois, 60612, United States of America
- * E-mail:
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26
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Miyamoto D, Hirai D, Fung CCA, Inutsuka A, Odagawa M, Suzuki T, Boehringer R, Adaikkan C, Matsubara C, Matsuki N, Fukai T, McHugh TJ, Yamanaka A, Murayama M. Top-down cortical input during NREM sleep consolidates perceptual memory. Science 2016; 352:1315-8. [DOI: 10.1126/science.aaf0902] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Accepted: 05/12/2016] [Indexed: 12/30/2022]
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27
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Umemoto S, Okamoto T, Yoshimura K, Sakumura T, Murata T, Fukai T, Yano M, Matsuzaki M. TOLL-LIKE RECEPTOR 4 FUNCTION IS ESSENTIAL FOR INCREASING OXIDATIVE STRESS, AND PROMOTING THE INFLAMMATION AND GLOMERULAR SCLEROSIS BY ANGIOTENSIN II. J Am Coll Cardiol 2016. [DOI: 10.1016/s0735-1097(16)32244-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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Chen GF, Sudhahar V, Youn SW, Das A, Cho J, Kamiya T, Urao N, McKinney RD, Surenkhuu B, Hamakubo T, Iwanari H, Li S, Christman JW, Shantikumar S, Angelini GD, Emanueli C, Ushio-Fukai M, Fukai T. Copper Transport Protein Antioxidant-1 Promotes Inflammatory Neovascularization via Chaperone and Transcription Factor Function. Sci Rep 2015; 5:14780. [PMID: 26437801 PMCID: PMC4594038 DOI: 10.1038/srep14780] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 09/07/2015] [Indexed: 01/24/2023] Open
Abstract
Copper (Cu), an essential micronutrient, plays a fundamental role in inflammation and angiogenesis; however, its precise mechanism remains undefined. Here we uncover a novel role of Cu transport protein Antioxidant-1 (Atox1), which is originally appreciated as a Cu chaperone and recently discovered as a Cu-dependent transcription factor, in inflammatory neovascularization. Atox1 expression is upregulated in patients and mice with critical limb ischemia. Atox1-deficient mice show impaired limb perfusion recovery with reduced arteriogenesis, angiogenesis, and recruitment of inflammatory cells. In vivo intravital microscopy, bone marrow reconstitution, and Atox1 gene transfer in Atox1−/− mice show that Atox1 in endothelial cells (ECs) is essential for neovascularization and recruitment of inflammatory cells which release VEGF and TNFα. Mechanistically, Atox1-depleted ECs demonstrate that Cu chaperone function of Atox1 mediated through Cu transporter ATP7A is required for VEGF-induced angiogenesis via activation of Cu enzyme lysyl oxidase. Moreover, Atox1 functions as a Cu-dependent transcription factor for NADPH oxidase organizer p47phox, thereby increasing ROS-NFκB-VCAM-1/ICAM-1 expression and monocyte adhesion in ECs inflamed with TNFα in an ATP7A-independent manner. These findings demonstrate a novel linkage between Atox1 and NADPH oxidase involved in inflammatory neovascularization and suggest Atox1 as a potential therapeutic target for treatment of ischemic disease.
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Affiliation(s)
- Gin-Fu Chen
- Departments of Medicine (Section of Cardiology) and Pharmacology, University of Illinois at Chicago, Chicago, IL
| | - Varadarajan Sudhahar
- Departments of Medicine (Section of Cardiology) and Pharmacology, University of Illinois at Chicago, Chicago, IL.,Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, IL.,Jesse Brown Veterans Affairs Medical Center, Chicago, IL
| | - Seock-Won Youn
- Department of Pharmacology, University of Illinois at Chicago, Chicago, IL.,Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, IL
| | - Archita Das
- Departments of Medicine (Section of Cardiology) and Pharmacology, University of Illinois at Chicago, Chicago, IL.,Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, IL
| | - Jaehyung Cho
- Department of Pharmacology, University of Illinois at Chicago, Chicago, IL
| | - Tetsuro Kamiya
- Departments of Medicine (Section of Cardiology) and Pharmacology, University of Illinois at Chicago, Chicago, IL.,Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, IL
| | - Norifumi Urao
- Department of Pharmacology, University of Illinois at Chicago, Chicago, IL
| | - Ronald D McKinney
- Departments of Medicine (Section of Cardiology) and Pharmacology, University of Illinois at Chicago, Chicago, IL.,Department of Pharmacology, University of Illinois at Chicago, Chicago, IL.,Jesse Brown Veterans Affairs Medical Center, Chicago, IL
| | - Bayasgalan Surenkhuu
- Departments of Medicine (Section of Cardiology) and Pharmacology, University of Illinois at Chicago, Chicago, IL
| | - Takao Hamakubo
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan
| | - Hiroko Iwanari
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan
| | - Senlin Li
- Department of Medicine, University of Texas Health Science Center, San Antonio, Texas
| | - John W Christman
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine The Ohio State University Wexner Medical Center, OH
| | - Saran Shantikumar
- Bristol Heart Institute, School of Clinical Sciences, University of Bristol, Bristol
| | - Gianni D Angelini
- Bristol Heart Institute, School of Clinical Sciences, University of Bristol, Bristol.,National Heart and Lung Institute, Imperial College of London, London, UK
| | - Costanza Emanueli
- Bristol Heart Institute, School of Clinical Sciences, University of Bristol, Bristol.,National Heart and Lung Institute, Imperial College of London, London, UK
| | - Masuko Ushio-Fukai
- Department of Pharmacology, University of Illinois at Chicago, Chicago, IL.,Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, IL
| | - Tohru Fukai
- Departments of Medicine (Section of Cardiology) and Pharmacology, University of Illinois at Chicago, Chicago, IL.,Department of Pharmacology, University of Illinois at Chicago, Chicago, IL.,Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, IL.,Jesse Brown Veterans Affairs Medical Center, Chicago, IL
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29
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Nakashima T, Umemoto S, Yoshimura K, Matsuda S, Itoh S, Murata T, Fukai T, Matsuzaki M. TLR4 is a critical regulator of angiotensin II-induced vascular remodeling: the roles of extracellular SOD and NADPH oxidase. Hypertens Res 2015; 38:649-55. [PMID: 25854990 DOI: 10.1038/hr.2015.55] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Revised: 01/26/2015] [Accepted: 02/20/2015] [Indexed: 02/06/2023]
Abstract
Toll-like receptor 4 (TLR4) and angiotensin II (AngII) induce vascular remodeling through the production of reactive oxygen species (ROS). AngII has also been shown to increase antioxidant enzyme extracellular superoxide dismutase (ecSOD). However, the roles of TLR4 in Ang II-induced ROS production, vascular remodeling and hypertension remain unknown. Mice lacking TLR4 function showed significant inhibition of vascular remodeling in response to chronic AngII infusion, with no impact on blood pressure. The increases in ROS level and NADPH oxidase activity in response to AngII infusion were markedly blunted in TLR4-deficient mice. Similar effects were observed in wild-type (WT) mice treated with a sub-depressor dose of the AT1 receptor antagonist irbesartan, which had no effects on TLR4-deficient mice. Intriguingly, the AngII infusion-induced increases in ecSOD activity and expression were rather enhanced in TLR4-deficient mice compared with WT mice, whereas the expression of the proinflammatory chemokine MCP-1 was decreased. Importantly, AngII-induced vascular remodeling was positively correlated with NADPH oxidase activity, ROS levels and MCP-1 expression levels. Notably, chronic norepinephrine infusion, which elevates blood pressure without increasing ROS production, did not induce significant vascular remodeling in WT mice. Taken together, these findings suggest that ROS elevation is required for accelerating vascular remodeling but not for hypertensive effects in this model. We demonstrated that TLR4 plays a pivotal role in regulating AngII-induced vascular ROS levels by inhibiting the expression and activity of the antioxidant enzyme ecSOD, as well as by activating NADPH oxidase, which enhances inflammation to facilitate the progression of vascular remodeling.
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Affiliation(s)
- Tadaaki Nakashima
- Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan
| | - Seiji Umemoto
- Center for Clinical Research, Yamaguchi University Hospital, Yamaguchi, Japan
| | - Koichi Yoshimura
- Department of Surgery and Clinical Science, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan
| | - Susumu Matsuda
- Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan
| | - Shinichi Itoh
- Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan
| | - Tomoaki Murata
- Institute of Experimental Animals, Science Research Center, Yamaguchi University, Yamaguchi, Japan
| | - Tohru Fukai
- Department of Medicine and Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, IL, USA
| | - Masunori Matsuzaki
- Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan
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30
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Matsuda S, Umemoto S, Yoshimura K, Itoh S, Murata T, Fukai T, Matsuzaki M. Angiotensin Ⅱ Activates MCP-1 and Induces Cardiac Hypertrophy and Dysfunction via Toll-like Receptor 4. J Atheroscler Thromb 2015; 22:833-44. [PMID: 25752363 DOI: 10.5551/jat.27292] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
AIM Angiotensin Ⅱ(Ang Ⅱ) produces reactive oxygen species (ROS), thus contributing to the development of cardiac hypertrophy and subsequent heart failure, and stimulates the expression of monocyte chemoattractant protein-1 (MCP-1). In addition, Toll-like receptor 4 (TLR4) is involved in the upregulation of MCP-1. In order to clarify whether TLR4 is involved in the onset of cardiac dysfunction caused by Ang Ⅱ stimulation, we investigated the effects of TLR4 on oxidative stress, the MCP-1 expression and cardiac dysfunction in mice with Ang Ⅱ-induced hypertension. METHODS TLR4-deficient (Tlr4(lps-d)) and wild-type (WT) mice were randomized into groups treated with Ang Ⅱ, norepinephrine (NE) or a subdepressor dose of the Ang Ⅱreceptor blocker irbesartan (IRB) and Ang Ⅱ for two weeks. RESULTS Ang Ⅱ and NE similarly increased systolic blood pressure in all drug-treated groups compared to that observed in the control group among both WT and Tlr4(lps-d) mice (p<0.05). In the WT mice, Ang Ⅱ induced cardiac hypertrophy as well as vascular remodeling and perivascular fibrosis of the intramyocardial arteries and monocyte/macrophage infiltration in the heart (p<0.05). Furthermore, Ang Ⅱ treatment decreased the left ventricular diastolic function and resulted in a greater left ventricular end-systolic dimension (p<0.05) in addition to producing a five-fold increase in the NADPH oxidase activity, ROS content and MCP-1 expression (p<0.05). In contrast, the Tlr4(lps-d) mice showed little effects of Ang Ⅱ on these indices. In the WT mice, IRB treatment reversed these changes compared to that seen in the mice treated with Ang Ⅱ alone. NE produced little effect on any of the indices in either the WT or Tlr4(lps-d) mice. CONCLUSIONS TLR4 may be involved in the processes underlying the increased oxidative stress, selectively activated MCP-1 expression and cardiac hypertrophy and dysfunction seen in cases of Ang Ⅱ- induced hypertension.
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Affiliation(s)
- Susumu Matsuda
- Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
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Kohler EE, Baruah J, Urao N, Ushio-Fukai M, Fukai T, Chatterjee I, Wary KK. Low-dose 6-bromoindirubin-3'-oxime induces partial dedifferentiation of endothelial cells to promote increased neovascularization. Stem Cells 2015; 32:1538-52. [PMID: 24496925 DOI: 10.1002/stem.1658] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Accepted: 01/07/2014] [Indexed: 02/06/2023]
Abstract
Endothelial cell (EC) dedifferentiation in relation to neovascularization is a poorly understood process. In this report, we addressed the role of Wnt signaling in the mechanisms of neovascularization in adult tissues. Here, we show that a low-dose of 6-bromoindirubin-3'-oxime (BIO), a competitive inhibitor of glycogen synthase kinase-3β, induced the stabilization of β-catenin and its subsequent direct interaction with the transcription factor NANOG in the nucleus of ECs. This event induced loss of VE-cadherin from the adherens junctions, increased EC proliferation accompanied by asymmetric cell division (ACD), and formed cellular aggregates in hanging drop assays indicating the acquisition of a dedifferentiated state. In a chromatin immunoprecipitation assay, nuclear NANOG protein bound to the NANOG- and VEGFR2-promoters in ECs, and the addition of BIO activated the NANOG-promoter-luciferase reporter system in a cell-based assay. Consequently, NANOG-knockdown decreased BIO-induced NOTCH-1 expression, thereby decreasing cell proliferation, ACD, and neovascularization. In a Matrigel plug assay, BIO induced increased neovascularization, secondary to the presence of vascular endothelial growth factor (VEGF). Moreover, in a mouse model of hind limb ischemia, BIO augmented neovascularization that was coupled with increased expression of NOTCH-1 in ECs and increased smooth muscle α-actin(+) cell recruitment around the neovessels. Thus, these results demonstrate the ability of a low-dose of BIO to augment neovascularization secondary to VEGF, a process that was accompanied by a partial dedifferentiation of ECs via β-catenin and the NANOG signaling pathway.
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Affiliation(s)
- Erin E Kohler
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois, USA
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Mao M, Varadarajan S, Fukai T, Bakhshi FR, Chernaya O, Dudley SC, Minshall RD, Bonini MG. Nitroglycerin tolerance in caveolin-1 deficient mice. PLoS One 2014; 9:e104101. [PMID: 25158065 PMCID: PMC4144835 DOI: 10.1371/journal.pone.0104101] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 07/06/2014] [Indexed: 11/18/2022] Open
Abstract
Nitrate tolerance developed after persistent nitroglycerin (GTN) exposure limits its clinical utility. Previously, we have shown that the vasodilatory action of GTN is dependent on endothelial nitric oxide synthase (eNOS/NOS3) activity. Caveolin-1 (Cav-1) is known to interact with NOS3 on the cytoplasmic side of cholesterol-enriched plasma membrane microdomains (caveolae) and to inhibit NOS3 activity. Loss of Cav-1 expression results in NOS3 hyperactivation and uncoupling, converting NOS3 into a source of superoxide radicals, peroxynitrite, and oxidative stress. Therefore, we hypothesized that nitrate tolerance induced by persistent GTN treatment results from NOS3 dysfunction and vascular toxicity. Exposure to GTN for 48-72 h resulted in nitrosation and depletion (>50%) of Cav-1, NOS3 uncoupling as measured by an increase in peroxynitrite production (>100%), and endothelial toxicity in cultured cells. In the Cav-1 deficient mice, NOS3 dysfunction was accompanied by GTN tolerance (>50% dilation inhibition at low GTN concentrations). In conclusion, GTN tolerance results from Cav-1 modification and depletion by GTN that causes persistent NOS3 activation and uncoupling, preventing it from participating in GTN-medicated vasodilation.
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Affiliation(s)
- Mao Mao
- Department of Medicine-Section of Cardiology, University of Illinois at Chicago, Chicago, Illinois, United States of America
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois, United States of America
- Department of Pathology, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Sudhahar Varadarajan
- Department of Medicine-Section of Cardiology, University of Illinois at Chicago, Chicago, Illinois, United States of America
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Tohru Fukai
- Department of Medicine-Section of Cardiology, University of Illinois at Chicago, Chicago, Illinois, United States of America
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Farnaz R. Bakhshi
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Olga Chernaya
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Samuel C. Dudley
- Department of Medicine-Section of Cardiology, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Richard D. Minshall
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois, United States of America
- Department of Anesthesiology, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Marcelo G. Bonini
- Department of Medicine-Section of Cardiology, University of Illinois at Chicago, Chicago, Illinois, United States of America
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois, United States of America
- * E-mail:
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Mao M, Varadarajan S, Fukai T, Bakhshi F, Chernaya O, Dudley S, Minshall R, Bonini M. Caveolin‐1 nitrosation and degradation results in eNOS uncoupling, endothelial dysfunction, and nitrate tolerance (851.18). FASEB J 2014. [DOI: 10.1096/fasebj.28.1_supplement.851.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mao Mao
- Department of Medicine University of Illinois at CHICAGOChicagoILUnited States
| | | | - Tohru Fukai
- Department of Medicine University of Illinois at CHICAGOChicagoILUnited States
- Department of Pharmacology University of Illinois at CHICAGOChicagoILUnited States
| | - Farnaz Bakhshi
- Department of Pharmacology University of Illinois at CHICAGOChicagoILUnited States
| | - Olga Chernaya
- Department of Anesthesiology University of Illinois at CHICAGOChicagoILUnited States
| | - Samuel Dudley
- Lifespan Cardiovascular Research Center; the Warren Alpert School of MedicineBrown University Brown UniversityProvidenceRIUnited States
- Providence Veterans Administration Medical CenterProvidenceRIUnited States
| | - Rich Minshall
- Department of Anesthesiology University of Illinois at CHICAGOChicagoILUnited States
- Department of Pharmacology University of Illinois at CHICAGOChicagoILUnited States
| | - Marcelo Bonini
- Department of Medicine University of Illinois at CHICAGOChicagoILUnited States
- Department of Pharmacology University of Illinois at CHICAGOChicagoILUnited States
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Sudhahar V, Urao N, Oshikawa J, McKinney RD, Llanos RM, Mercer JF, Ushio-Fukai M, Fukai T. Copper transporter ATP7A protects against endothelial dysfunction in type 1 diabetic mice by regulating extracellular superoxide dismutase. Diabetes 2013; 62:3839-50. [PMID: 23884884 PMCID: PMC3806617 DOI: 10.2337/db12-1228] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Oxidative stress and endothelial dysfunction contribute to vascular complication in diabetes. Extracellular superoxide dismutase (SOD3) is one of the key antioxidant enzymes that obtains copper via copper transporter ATP7A. SOD3 is secreted from vascular smooth muscles cells (VSMCs) and anchors at the endothelial surface. The role of SOD3 and ATP7A in endothelial dysfunction in type 1 diabetes mellitus (T1DM) is entirely unknown. Here we show that the specific activity of SOD3, but not SOD1, is decreased, which is associated with increased O2(•-) production in aortas of streptozotocin-induced and genetically induced Ins2(Akita) T1DM mice. Exogenous copper partially rescued SOD3 activity in isolated T1DM vessels. Functionally, acetylcholine-induced, endothelium-dependent relaxation is impaired in T1DM mesenteric arteries, which is rescued by SOD mimetic tempol or gene transfer of SOD3. Mechanistically, ATP7A expression in T1DM vessels is dramatically decreased whereas other copper transport proteins are not altered. T1DM-induced endothelial dysfunction and decrease of SOD3 activity are rescued in transgenic mice overexpressing ATP7A. Furthermore, SOD3-deficient T1DM mice or ATP7A mutant T1DM mice augment endothelial dysfunction and vascular O2(•-) production versus T1DM mice. These effects are in part due to hypoinsulinemia in T1DM mice, since insulin treatment, but not high glucose, increases ATP7A expression in VSMCs and restores SOD3 activity in the organoid culture of T1DM vessels. In summary, a decrease in ATP7A protein expression contributes to impaired SOD3 activity, resulting in O2(•-) overproduction and endothelial dysfunction in blood vessels of T1DM. Thus, restoring copper transporter function is an essential therapeutic approach for oxidant stress-dependent vascular and metabolic diseases.
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Affiliation(s)
- Varadarajan Sudhahar
- Section of Cardiology, Department of Medicine, and Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois
- Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois
| | - Norifumi Urao
- Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois
| | - Jin Oshikawa
- Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois
| | - Ronald D. McKinney
- Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois
- Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois
| | - Roxana M. Llanos
- Centre for Cellular and Molecular Biology, School of Life and Environmental Sciences, Deakin University, Burwood, Australia
| | - Julian F.B. Mercer
- Centre for Cellular and Molecular Biology, School of Life and Environmental Sciences, Deakin University, Burwood, Australia
| | - Masuko Ushio-Fukai
- Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois
| | - Tohru Fukai
- Section of Cardiology, Department of Medicine, and Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois
- Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois
- Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois
- Corresponding author: Tohru Fukai,
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Kohno T, Urao N, Ashino T, Sudhahar V, Inomata H, Yamaoka-Tojo M, McKinney RD, Fukai T, Ushio-Fukai M. IQGAP1 links PDGF receptor-β signal to focal adhesions involved in vascular smooth muscle cell migration: role in neointimal formation after vascular injury. Am J Physiol Cell Physiol 2013; 305:C591-600. [PMID: 23657573 DOI: 10.1152/ajpcell.00011.2013] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Platelet-derived growth factor (PDGF) stimulates vascular smooth muscle cell (VSMC) migration and neointimal formation in response to injury. We previously identified IQ-domain GTPase-activating protein 1 (IQGAP1) as a novel VEGF receptor 2 binding scaffold protein involved in endothelial migration. However, its role in VSMC migration and neointimal formation in vivo is unknown. Here we show that PDGF stimulation rapidly promotes IQGAP1 association with PDGF receptor-β (PDGFR) as well as IQGAP1 tyrosine phosphorylation in cultured VSMC. Overexpression or knockdown of IQGAP1 enhances or inhibits PDGFR autophosphorylation (p-PDGFR), respectively. Immunofluorescence and cell fractionation analysis reveals that PDGF-induced p-PDGFR localized in focal adhesions (FAs), but not caveolae/lipid rafts, is inhibited by IQGAP1 knockdown with siRNA. PDGF stimulation promotes IQGAP1 association with PDGFR/FA signaling protein complex. Functionally, IQGAP1 siRNA inhibits PDGF-induced FA formation as well as VSMC migration induced by PDGF. In vivo, IQGAP1 expression is markedly increased at neointimal VSMC in wire-injured femoral arteries. Mice lacking IQGAP1 exhibit impaired neointimal formation in response to vascular injury. In summary, IQGAP1, through interaction with PDGFR and FA signaling proteins, promotes activation of PDGFR in FAs as well as FA formation, which may contribute to VSMC migration and neointimal formation after injury. Our findings provide insight into IQGAP1 as a potential therapeutic target for vascular migration-related diseases.
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Affiliation(s)
- Takashi Kohno
- Department of Pharmacology, Center for Lung and Vascular Biology, University of Illinois at Chicago, Chicago, Illinois
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Mao M, Sudhahar V, Fukai T, Bakhshi F, Minshall RD, Dudley SC, Bonini MG. P54. Nitric Oxide 2013. [DOI: 10.1016/j.niox.2013.02.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kohno T, Urao N, Ashino T, Sudhahar V, McKinney RD, Hamakubo T, Iwanari H, Ushio-Fukai M, Fukai T. Novel role of copper transport protein antioxidant-1 in neointimal formation after vascular injury. Arterioscler Thromb Vasc Biol 2013; 33:805-13. [PMID: 23349186 DOI: 10.1161/atvbaha.112.300862] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Vascular smooth muscle cell (VSMC) migration is critically important for neointimal formation after vascular injury and atherosclerosis lesion formation. Copper (Cu) chelator inhibits neointimal formation, and we previously demonstrated that Cu transport protein antioxidant-1 (Atox1) is involved in Cu-induced cell growth. However, role of Atox1 in VSMC migration and neointimal formation after vascular injury is unknown. APPROACH AND RESULTS Here, we show that Atox1 expression is upregulated in injured vessel, and it is colocalized with the Cu transporter ATP7A, one of the downstream targets of Atox1, mainly in neointimal VSMCs at day 14 after wire injury. Atox1(-/-) mice show inhibition of neointimal formation and extracellular matrix expansion, which is associated with a decreased VSMCs accumulation within neointima and lysyl oxidase activity. Mechanistically, in cultured VSMC, Atox1 depletion with siRNA inhibits platelet-derived growth factor-induced Cu-dependent VSMC migration by preventing translocation of ATP7A and small G protein Rac1 to the leading edge, as well as Cu- and Rac1-dependent lamellipodia formation. Furthermore, Atox1(-/-) mice show decreased perivascular macrophage infiltration in wire-injured vessels, as well as thioglycollate-induced peritoneal macrophage recruitment. CONCLUSIONS Atox1 is involved in neointimal formation after vascular injury through promoting VSMC migration and inflammatory cell recruitment in injured vessels. Thus, Atox1 is a potential therapeutic target for VSMC migration and inflammation-related vascular diseases.
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Affiliation(s)
- Takashi Kohno
- Department of Medicine, Center for Cardiovascular Research, University of Illinois at Chicago, 835 S. Wolcott, M/C868, E403 MSB, Chicago, IL 60612, USA
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Profirovic J, Strekalova E, Urao N, Krbanjevic A, Andreeva AV, Varadarajan S, Fukai T, Hen R, Ushio-Fukai M, Voyno-Yasenetskaya TA. A novel regulator of angiogenesis in endothelial cells: 5-hydroxytriptamine 4 receptor. Angiogenesis 2012; 16:15-28. [PMID: 22903372 DOI: 10.1007/s10456-012-9296-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2012] [Accepted: 08/07/2012] [Indexed: 01/09/2023]
Abstract
The 5-hydroxytryptamine type 4 receptor (5-HT(4)R) regulates many physiological processes, including learning and memory, cognition, and gastrointestinal motility. Little is known about its role in angiogenesis. Using mouse hindlimb ischemia model of angiogenesis, we observed a significant reduction of limb blood flow recovery 14 days after ischemia and a decrease in density of CD31-positive vessels in adductor muscles in 5-HT(4)R(-/-) mice compared to wild type littermates. Our in vitro data indicated that 5-HT(4)R endogenously expressed in endothelial cells (ECs) may promote angiogenesis. Inhibition of the receptor with 5-HT(4)R antagonist RS 39604 reduced EC capillary tube formation in the reconstituted basement membrane. Using Boyden chamber migration assay and wound healing "scratch" assay, we demonstrated that RS 39604 treatment significantly suppressed EC migration. Transendothelial resistance measurement and immunofluorescence analysis showed that a 5-HT(4)R agonist RS 67333 led to an increase in endothelial permeability, actin stress fiber and interendothelial gap formation. Importantly, we provided the evidence that 5-HT(4)R-regulated EC migration may be mediated by Gα13 and RhoA. Our results suggest a prominent role of 5-HT(4)R in promoting angiogenesis and identify 5-HT(4)R as a potential therapeutic target for modulating angiogenesis under pathological conditions.
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Affiliation(s)
- Jasmina Profirovic
- Department of Pharmacology, College of Medicine, University of Illinois, Chicago, USA.
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Wagatsuma N, Potjans T, Diesmann M, Sakai K, Fukai T. Space-based and Feature-based Attention in a Realistic Layered-microcircuit Model of Visual Cortex. J Vis 2012. [DOI: 10.1167/12.9.662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Urao N, McKinney RD, Fukai T, Ushio-Fukai M. NADPH oxidase 2 regulates bone marrow microenvironment following hindlimb ischemia: role in reparative mobilization of progenitor cells. Stem Cells 2012; 30:923-34. [PMID: 22290850 DOI: 10.1002/stem.1048] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Bone marrow (BM) microenvironment, which is regulated by hypoxia and proteolytic enzymes, is crucial for stem/progenitor cell function and mobilization involved in postnatal neovascularization. We demonstrated that NADPH oxidase 2 (Nox2)-derived reactive oxygen species (ROS) are involved in postischemic mobilization of BM cells and revascularization. However, role of Nox2 in regulating BM microenvironment in response to ischemic injury remains unknown. Here, we show that hindlimb ischemia of mice increases ROS production in both the endosteal and central region of BM tissue in situ, which is almost completely abolished in Nox2 knockout (KO) mice. This Nox2-dependent ROS production is mainly derived from Gr-1(+) myeloid cells in BM. In vivo injection of hypoxyprobe reveals that endosteum at the BM is hypoxic with high expression of hypoxia-inducible factor-1α in basal state. Following hindlimb ischemia, hypoxic areas and HIF-1α expression are expanded throughout the BM, which is inhibited in Nox2 KO mice. This ischemia-induced alteration of Nox2-dependent BM microenvironment is associated with an increase in vascular endothelial growth factor expression and Akt phosphorylation in BM tissue, thereby promoting Lin(-) progenitor cell survival and expansion, leading to their mobilization from BM. Furthermore, hindlimb ischemia increases proteolytic enzymes membrane type 1-matrix metalloproteinase (MMP) expression and MMP-9 activity in BM, which is inhibited in Nox2 KO mice. In summary, Nox2-dependent increase in ROS plays a critical role in regulating hypoxia expansion and proteolytic activities in BM microenvironment in response to tissue ischemia. This in turn promotes progenitor cell expansion and reparative mobilization from BM, leading to postischemic neovascularization and tissue repair.
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Affiliation(s)
- Norifumi Urao
- Department of Pharmacology, Center for Lung and Vascular Biology, University of Illinois at Chicago, Chicago, Illinois 60612, USA
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Ozumi K, Sudhahar V, Kim HW, Chen GF, Kohno T, Finney L, Vogt S, McKinney RD, Ushio-Fukai M, Fukai T. Role of copper transport protein antioxidant 1 in angiotensin II-induced hypertension: a key regulator of extracellular superoxide dismutase. Hypertension 2012; 60:476-86. [PMID: 22753205 DOI: 10.1161/hypertensionaha.111.189571] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Extracellular superoxide dismutase (SOD3) is a secretory copper enzyme involved in protecting angiotensin II (Ang II)-induced hypertension. We found previously that Ang II upregulates SOD3 expression and activity as a counterregulatory mechanism; however, underlying mechanisms are unclear. Antioxidant 1 (Atox1) is shown to act as a copper-dependent transcription factor, as well as a copper chaperone, for SOD3 in vitro, but its role in Ang II-induced hypertension in vivo is unknown. Here we show that Ang II infusion increases Atox1 expression, as well as SOD3 expression and activity, in aortas of wild-type mice, which are inhibited in mice lacking Atox1. Accordingly, Ang II increases vascular superoxide production, reduces endothelium-dependent vasodilation, and increases vasoconstriction in mesenteric arteries to a greater extent in Atox1(-/-) than in wild-type mice. This contributes to augmented hypertensive response to Ang II in Atox1(-/-) mice. In cultured vascular smooth muscle cells, Ang II promotes translocation of Atox1 to the nucleus, thereby increasing SOD3 transcription by binding to Atox1-responsive element in the SOD3 promoter. Furthermore, Ang II increases Atox1 binding to the copper exporter ATP7A, which obtains copper from Atox1, as well as translocation of ATP7A to plasma membranes, where it colocalizes with SOD3. As its consequence, Ang II decreases vascular copper levels, which is inhibited in Atox1(-/-) mice. In summary, Atox1 functions to prevent Ang II-induced endothelial dysfunction and hypercontraction in resistant vessels, as well as hypertension, in vivo by reducing extracellular superoxide levels via increasing vascular SOD3 expression and activity.
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Affiliation(s)
- Kiyoshi Ozumi
- Department of Medicine, Center for Cardiovascular Research, Center for Lung and Vascular Biology, University of Illinois at Chicago, Chicago, IL 60612, USA
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Varadarajan S, Urao N, Oshikawa J, Llanos RM, Mckinney RD, Ushio-Fukai M, Fukai T. Novel Role of the ATP7A Copper‐transporting ATPase and Extracellular SOD in Endothelial Dysfunction in Type I Diabetes Mellitus. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.1057.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Mao M, Sudhahar V, Ansenberger-Fricano K, Fernandes DC, Tanaka LY, Fukai T, Laurindo FR, Mason RP, Vasquez-Vivar J, Minshall RD, Stadler K, Bonini MG. Nitroglycerin drives endothelial nitric oxide synthase activation via the phosphatidylinositol 3-kinase/protein kinase B pathway. Free Radic Biol Med 2012; 52:427-35. [PMID: 22037515 PMCID: PMC3432314 DOI: 10.1016/j.freeradbiomed.2011.09.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2011] [Revised: 09/12/2011] [Accepted: 09/17/2011] [Indexed: 02/07/2023]
Abstract
Nitroglycerin (GTN) has been clinically used to treat angina pectoris and acute heart episodes for over 100 years. The effects of GTN have long been recognized and active research has contributed to the unraveling of numerous metabolic routes capable of converting GTN to the potent vasoactive messenger nitric oxide. Recently, the mechanism by which minute doses of GTN elicit robust pharmacological responses was revisited and eNOS activation was implicated as an important route mediating vasodilation induced by low GTN doses (1-50nM). Here, we demonstrate that at such concentrations the pharmacologic effects of nitroglycerin are largely dependent on the phosphatidylinositol 3-kinase, Akt/PKB, and phosphatase and tensin homolog deleted on chromosome 10 (PTEN) signal transduction axis. Furthermore, we demonstrate that nitroglycerin-dependent accumulation of 3,4,5-InsP(3), probably because of inhibition of PTEN, is important for eNOS activation, conferring a mechanistic basis for GTN pharmacological action at pharmacologically relevant doses.
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Affiliation(s)
- Mao Mao
- Section of Cardiology and Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Varadarajan Sudhahar
- Section of Cardiology and Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Kristine Ansenberger-Fricano
- Section of Cardiology and Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Denise C. Fernandes
- Vascular Biology Laboratory, Heart Institute (InCor), University of Sao Paulo School of Medicine, Sao Paulo, Brazil
| | - Leonardo Y. Tanaka
- Vascular Biology Laboratory, Heart Institute (InCor), University of Sao Paulo School of Medicine, Sao Paulo, Brazil
| | - Tohru Fukai
- Section of Cardiology and Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Francisco R.M. Laurindo
- Vascular Biology Laboratory, Heart Institute (InCor), University of Sao Paulo School of Medicine, Sao Paulo, Brazil
| | - Ronald P. Mason
- Laboratory of Pharmacology and Chemistry, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA
| | | | - Richard D. Minshall
- Departments of Pharmacology and Anesthesiology, University of Illinois at Chicago, IL, 60612 USA
| | - Krisztian Stadler
- Laboratory of Pharmacology and Chemistry, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA
| | - Marcelo G. Bonini
- Section of Cardiology and Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
- Laboratory of Pharmacology and Chemistry, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA
- Corresponding author at: Section of Cardiology and Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA. (M.G. Bonini)
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Oshikawa J, Kim SJ, Furuta E, Caliceti C, Chen GF, McKinney RD, Kuhr F, Levitan I, Fukai T, Ushio-Fukai M. Novel role of p66Shc in ROS-dependent VEGF signaling and angiogenesis in endothelial cells. Am J Physiol Heart Circ Physiol 2011; 302:H724-32. [PMID: 22101521 DOI: 10.1152/ajpheart.00739.2011] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
p66Shc, a longevity adaptor protein, is demonstrated as a key regulator of reactive oxygen species (ROS) metabolism involved in aging and cardiovascular diseases. Vascular endothelial growth factor (VEGF) stimulates endothelial cell (EC) migration and proliferation primarily through the VEGF receptor-2 (VEGFR2). We have shown that ROS derived from Rac1-dependent NADPH oxidase are involved in VEGFR2 autophosphorylation and angiogenic-related responses in ECs. However, a role of p66Shc in VEGF signaling and physiological responses in ECs is unknown. Here we show that VEGF promotes p66Shc phosphorylation at Ser36 through the JNK/ERK or PKC pathway as well as Rac1 binding to a nonphosphorylated form of p66Shc in ECs. Depletion of endogenous p66Shc with short interfering RNA inhibits VEGF-induced Rac1 activity and ROS production. Fractionation of caveolin-enriched lipid raft demonstrates that p66Shc plays a critical role in VEGFR2 phosphorylation in caveolae/lipid rafts as well as downstream p38MAP kinase activation. This in turn stimulates VEGF-induced EC migration, proliferation, and capillary-like tube formation. These studies uncover a novel role of p66Shc as a positive regulator for ROS-dependent VEGFR2 signaling linked to angiogenesis in ECs and suggest p66Shc as a potential therapeutic target for various angiogenesis-dependent diseases.
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Affiliation(s)
- Jin Oshikawa
- Department of Pharmacology, Center for Lung and Vascular Biology, University of Illinois, Chicago, IL 60612, USA
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Wedgwood S, Lakshminrusimha S, Fukai T, Russell JA, Schumacker PT, Steinhorn RH. Hydrogen peroxide regulates extracellular superoxide dismutase activity and expression in neonatal pulmonary hypertension. Antioxid Redox Signal 2011; 15:1497-506. [PMID: 20919937 PMCID: PMC3151423 DOI: 10.1089/ars.2010.3630] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
We previously demonstrated that superoxide and H(2)O(2) promote pulmonary arterial vasoconstriction in a lamb model of persistent pulmonary hypertension of the newborn (PPHN). Because extracellular superoxide dismutase (ecSOD) augments vasodilation, we hypothesized that H(2)O(2)-mediated ecSOD inactivation contributes to pulmonary arterial vasoconstriction in PPHN lambs. ecSOD activity was decreased in pulmonary arterial smooth muscle cells (PASMCs) isolated from PPHN lambs relative to controls. Exposure to 95% O(2) to mimic hyperoxic ventilation reduced ecSOD activity in control PASMCs. In both cases, these events were associated with increased protein thiol oxidation, as detected by the redox sensor roGFP. Accordingly, exogenous H(2)O(2) decreased ecSOD activity in control PASMCs, and PEG-catalase restored ecSOD activity in PPHN PASMCs. In intact animal studies, ecSOD activity was decreased in fetal PPHN lambs, and in PPHN lambs ventilated with 100% O(2) relative to controls. In ventilated PPHN lambs, administration of a single dose of intratracheal PEG-catalase enhanced ecSOD activity, reduced superoxide levels, and improved oxygenation. We propose that H(2)O(2) generated by PPHN and hyperoxia inactivates ecSOD, and intratracheal catalase enhances enzyme function. The associated decrease in extracellular superoxide augments vasodilation, suggesting that H(2)O(2) scavengers may represent an effective therapy in the clinical management of PPHN.
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Affiliation(s)
- Stephen Wedgwood
- Department of Pediatrics, Division of Neonatology, Northwestern University Feinberg School of Medicine, 310 E. Superior St., Chicago, IL 60611, USA.
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Abstract
Excessive reactive oxygen species Revised abstract, especially superoxide anion (O₂•-), play important roles in the pathogenesis of many cardiovascular diseases, including hypertension and atherosclerosis. Superoxide dismutases (SODs) are the major antioxidant defense systems against (O₂•-), which consist of three isoforms of SOD in mammals: the cytoplasmic Cu/ZnSOD (SOD1), the mitochondrial MnSOD (SOD2), and the extracellular Cu/ZnSOD (SOD3), all of which require catalytic metal (Cu or Mn) for their activation. Recent evidence suggests that in each subcellular location, SODs catalyze the conversion of (O₂•-), H2O2, which may participate in cell signaling. In addition, SODs play a critical role in inhibiting oxidative inactivation of nitric oxide, thereby preventing peroxynitrite formation and endothelial and mitochondrial dysfunction. The importance of each SOD isoform is further illustrated by studies from the use of genetically altered mice and viral-mediated gene transfer. Given the essential role of SODs in cardiovascular disease, the concept of antioxidant therapies, that is, reinforcement of endogenous antioxidant defenses to more effectively protect against oxidative stress, is of substantial interest. However, the clinical evidence remains controversial. In this review, we will update the role of each SOD in vascular biologies, physiologies, and pathophysiologies such as atherosclerosis, hypertension, and angiogenesis. Because of the importance of metal cofactors in the activity of SODs, we will also discuss how each SOD obtains catalytic metal in the active sites. Finally, we will discuss the development of future SOD-dependent therapeutic strategies.
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Affiliation(s)
- Tohru Fukai
- Section of Cardiology, Department of Medicine, University of Illinois at Chicago, 835 S. Wolcott, Chicago, IL 60612, USA.
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Kaplan N, Urao N, Furuta E, Kim SJ, Razvi M, Nakamura Y, McKinney RD, Poole LB, Fukai T, Ushio-Fukai M. Localized cysteine sulfenic acid formation by vascular endothelial growth factor: role in endothelial cell migration and angiogenesis. Free Radic Res 2011; 45:1124-35. [PMID: 21740309 DOI: 10.3109/10715762.2011.602073] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Reactive oxygen species (ROS) are important mediators for VEGF receptor 2 (VEGFR2) signalling involved in angiogenesis. The initial product of Cys oxidation, cysteine sulfenic acid (Cys-OH), is a key intermediate in redox signal transduction; however, its role in VEGF signalling is unknown. We have previously demonstrated IQGAP1 as a VEGFR2 binding scaffold protein involved in ROS-dependent EC migration and post-ischemic angiogenesis. Using a biotin-labelled Cys-OH trapping reagent, we show that VEGF increases protein-Cys-OH formation at the lamellipodial leading edge where it co-localizes with NADPH oxidase and IQGAP1 in migrating ECs, which is prevented by IQGAP1 siRNA or trapping of Cys-OH with dimedone. VEGF increases IQGAP1-Cys-OH formation, which is prevented by N-acetyl cysteine or dimedone, which inhibits VEGF-induced EC migration and capillary network formation. In vivo, hindlimb ischemia in mice increases Cys-OH formation in small vessels and IQGAP1 in ischemic tissues. In summary, VEGF stimulates localized formation of Cys-OH-IQGAP1 at the leading edge, thereby promoting directional EC migration, which may contribute to post-natal angiogenesis in vivo. Thus, targeting Cys-oxidized proteins at specific compartments may be the potential therapeutic strategy for various angiogenesis-dependent diseases.
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Affiliation(s)
- Nihal Kaplan
- Department of Pharmacology, Center for Lung and Vascular Biology, University of Illinois at Chicago, Chicago, IL 60612, USA
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Urao N, Chen G, Razvi M, McKinney RD, Fukai T, Ushio‐Fukai M. Protein Tyrosine Phosphatase 1B Deficiency Results in Reduced ROS Production and Perivascular Macrophage Infiltration in Ischemic Tissue and Impaired Post‐ischemic Neovascularization. FASEB J 2011. [DOI: 10.1096/fasebj.25.1_supplement.1092.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Gin‐Fu Chen
- CardiologyUniversity of Illinois at ChicagoChicagoIL
| | | | | | - Tohru Fukai
- CardiologyUniversity of Illinois at ChicagoChicagoIL
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Urao N, Razvi M, Oshikawa J, McKinney RD, Chavda R, Bahou WF, Fukai T, Ushio-Fukai M. IQGAP1 is involved in post-ischemic neovascularization by regulating angiogenesis and macrophage infiltration. PLoS One 2010; 5:e13440. [PMID: 20976168 PMCID: PMC2955540 DOI: 10.1371/journal.pone.0013440] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2010] [Accepted: 09/24/2010] [Indexed: 11/18/2022] Open
Abstract
Background Neovascularization is an important repair mechanism in response to ischemic injury and is dependent on inflammation, angiogenesis and reactive oxygen species (ROS). IQGAP1, an actin-binding scaffold protein, is a key regulator for actin cytoskeleton and motility. We previously demonstrated that IQGAP1 mediates vascular endothelial growth factor (VEGF)-induced ROS production and migration of cultured endothelial cells (ECs); however, its role in post-ischemic neovascularization is unknown. Methodology/Principal Findings Ischemia was induced by left femoral artery ligation, which resulted in increased IQGAP1 expression in Mac3+ macrophages and CD31+ capillary-like ECs in ischemic legs. Mice lacking IQGAP1 exhibited a significant reduction in the post-ischemic neovascularization as evaluated by laser Doppler blood flow, capillary density and α-actin positive arterioles. Furthermore, IQGAP1−/− mice showed a decrease in macrophage infiltration and ROS production in ischemic muscles, leading to impaired muscle regeneration and increased necrosis and fibrosis. The numbers of bone marrow (BM)-derived cells in the peripheral blood were not affected in these knockout mice. BM transplantation revealed that IQGAP1 expressed in both BM-derived cells and tissue resident cells, such as ECs, is required for post-ischemic neovascularization. Moreover, thioglycollate-induced peritoneal macrophage recruitment and ROS production were inhibited in IQGAP1−/− mice. In vitro, IQGAP1−/− BM-derived macrophages showed inhibition of migration and adhesion capacity, which may explain the defective macrophage recruitment into the ischemic tissue in IQGAP1−/− mice. Conclusions/Significance IQGAP1 plays a key role in post-ischemic neovascularization by regulating, not only, ECs-mediated angiogenesis but also macrophage infiltration as well as ROS production. Thus, IQGAP1 is a potential therapeutic target for inflammation- and angiogenesis-dependent ischemic cardiovascular diseases.
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Affiliation(s)
- Norifumi Urao
- Department of Pharmacology, Center for Lung and Vascular Biology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Masooma Razvi
- Department of Pharmacology, Center for Lung and Vascular Biology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Jin Oshikawa
- Department of Pharmacology, Center for Lung and Vascular Biology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Ronald D. McKinney
- Department of Pharmacology, Center for Lung and Vascular Biology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Rupal Chavda
- Department of Pharmacology, Center for Lung and Vascular Biology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Wadie F. Bahou
- Department of Medicine, State University of New York at Stony Brook, Stony Brook, New York, United States of America
| | - Tohru Fukai
- Departments of Medicine and Pharmacology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Masuko Ushio-Fukai
- Department of Pharmacology, Center for Lung and Vascular Biology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois, United States of America
- * E-mail:
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