1
|
Vendrov AE, Xiao H, Lozhkin A, Hayami T, Hu G, Brody MJ, Sadoshima J, Zhang YY, Runge MS, Madamanchi NR. Cardiomyocyte NOX4 regulates resident macrophage-mediated inflammation and diastolic dysfunction in stress cardiomyopathy. Redox Biol 2023; 67:102937. [PMID: 37871532 PMCID: PMC10598408 DOI: 10.1016/j.redox.2023.102937] [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: 08/31/2023] [Revised: 10/06/2023] [Accepted: 10/17/2023] [Indexed: 10/25/2023] Open
Abstract
In acute sympathetic stress, catecholamine overload can lead to stress cardiomyopathy. We tested the hypothesis that cardiomyocyte NOX4 (NADPH oxidase 4)-dependent mitochondrial oxidative stress mediates inflammation and diastolic dysfunction in stress cardiomyopathy. Isoproterenol (ISO; 5 mg/kg) injection induced sympathetic stress in wild-type and cardiomyocyte (CM)-specific Nox4 knockout (Nox4CM-/-) mice. Wild-type mice treated with ISO showed higher CM NOX4 expression, H2O2 levels, inflammasome activation, and IL18, IL6, CCL2, and TNFα levels than Nox4CM-/- mice. Spectral flow cytometry and t-SNE analysis of cardiac cell suspensions showed significant increases in pro-inflammatory and pro-fibrotic embryonic-derived resident (CCR2-MHCIIhiCX3CR1hi) macrophages in wild-type mice 3 days after ISO treatment, whereas Nox4CM-/- mice had a higher proportion of embryonic-derived resident tissue-repair (CCR2-MHCIIloCX3CR1lo) macrophages. A significant increase in cardiac fibroblast activation and interstitial collagen deposition and a restrictive pattern of diastolic dysfunction with increased filling pressure was observed in wild-type hearts compared with Nox4CM-/- 7 days post-ISO. A selective NOX4 inhibitor, GKT137831, reduced myocardial mitochondrial ROS, macrophage infiltration, and fibrosis in ISO-injected wild-type mice, and preserved diastolic function. Our data suggest sympathetic overstimulation induces resident macrophage (CCR2-MHCII+) activation and myocardial inflammation, resulting in fibrosis and impaired diastolic function mediated by CM NOX4-dependent ROS.
Collapse
Affiliation(s)
- Aleksandr E Vendrov
- Frankel Cardiovascular Center, Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Han Xiao
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, Beijing, 100191, China; NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Beijing, 100191, China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, 100191, China; Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China; Research Unit of Medical Science Research Management/Basic and Clinical Research of Metabolic Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, 100191, China
| | - Andrey Lozhkin
- Frankel Cardiovascular Center, Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Takayuki Hayami
- Frankel Cardiovascular Center, Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Guomin Hu
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, Beijing, 100191, China; NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Beijing, 100191, China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, 100191, China; Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China; Research Unit of Medical Science Research Management/Basic and Clinical Research of Metabolic Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, 100191, China
| | - Matthew J Brody
- Department of Pharmacology, University of Michigan, Ann Arbor, MI, 48109, USA; Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Junichi Sadoshima
- Rutgers New Jersey Medical School, Department of Cell Biology and Molecular Medicine, Rutgers Biomedical and Health Sciences, Newark, NJ, 07101, USA
| | - You-Yi Zhang
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, Beijing, 100191, China; NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Beijing, 100191, China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, 100191, China; Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China; Research Unit of Medical Science Research Management/Basic and Clinical Research of Metabolic Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, 100191, China
| | - Marschall S Runge
- Frankel Cardiovascular Center, Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Nageswara R Madamanchi
- Frankel Cardiovascular Center, Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA.
| |
Collapse
|
2
|
Ramos-Mondragón R, Lozhkin A, Vendrov AE, Runge MS, Isom LL, Madamanchi NR. NADPH Oxidases and Oxidative Stress in the Pathogenesis of Atrial Fibrillation. Antioxidants (Basel) 2023; 12:1833. [PMID: 37891912 PMCID: PMC10604902 DOI: 10.3390/antiox12101833] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 09/26/2023] [Accepted: 09/29/2023] [Indexed: 10/29/2023] Open
Abstract
Atrial fibrillation (AF) is the most common type of cardiac arrhythmia and its prevalence increases with age. The irregular and rapid contraction of the atria can lead to ineffective blood pumping, local blood stasis, blood clots, ischemic stroke, and heart failure. NADPH oxidases (NOX) and mitochondria are the main sources of reactive oxygen species in the heart, and dysregulated activation of NOX and mitochondrial dysfunction are associated with AF pathogenesis. NOX- and mitochondria-derived oxidative stress contribute to the onset of paroxysmal AF by inducing electrophysiological changes in atrial myocytes and structural remodeling in the atria. Because high atrial activity causes cardiac myocytes to expend extremely high energy to maintain excitation-contraction coupling during persistent AF, mitochondria, the primary energy source, undergo metabolic stress, affecting their morphology, Ca2+ handling, and ATP generation. In this review, we discuss the role of oxidative stress in activating AF-triggered activities, regulating intracellular Ca2+ handling, and functional and anatomical reentry mechanisms, all of which are associated with AF initiation, perpetuation, and progression. Changes in the extracellular matrix, inflammation, ion channel expression and function, myofibril structure, and mitochondrial function occur during the early transitional stages of AF, opening a window of opportunity to target NOX and mitochondria-derived oxidative stress using isoform-specific NOX inhibitors and mitochondrial ROS scavengers, as well as drugs that improve mitochondrial dynamics and metabolism to treat persistent AF and its transition to permanent AF.
Collapse
Affiliation(s)
- Roberto Ramos-Mondragón
- Department of Pharmacology, University of Michigan, 1150 West Medical Center Drive, 2301 Medical Science Research Building III, Ann Arbor, MI 48109, USA; (R.R.-M.); (L.L.I.)
| | - Andrey Lozhkin
- Department of Internal Medicine, Frankel Cardiovascular Center, University of Michigan, Ann Arbor, MI 48019, USA; (A.L.); (A.E.V.); (M.S.R.)
| | - Aleksandr E. Vendrov
- Department of Internal Medicine, Frankel Cardiovascular Center, University of Michigan, Ann Arbor, MI 48019, USA; (A.L.); (A.E.V.); (M.S.R.)
| | - Marschall S. Runge
- Department of Internal Medicine, Frankel Cardiovascular Center, University of Michigan, Ann Arbor, MI 48019, USA; (A.L.); (A.E.V.); (M.S.R.)
| | - Lori L. Isom
- Department of Pharmacology, University of Michigan, 1150 West Medical Center Drive, 2301 Medical Science Research Building III, Ann Arbor, MI 48109, USA; (R.R.-M.); (L.L.I.)
- Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Nageswara R. Madamanchi
- Department of Internal Medicine, Frankel Cardiovascular Center, University of Michigan, Ann Arbor, MI 48019, USA; (A.L.); (A.E.V.); (M.S.R.)
| |
Collapse
|
3
|
Lozhkin A, Vendrov AE, Ramos-Mondragón R, Canugovi C, Stevenson MD, Herron TJ, Hummel SL, Figueroa CA, Bowles DE, Isom LL, Runge MS, Madamanchi NR. Mitochondrial oxidative stress contributes to diastolic dysfunction through impaired mitochondrial dynamics. Redox Biol 2022; 57:102474. [PMID: 36183542 PMCID: PMC9530618 DOI: 10.1016/j.redox.2022.102474] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [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: 08/16/2022] [Accepted: 09/11/2022] [Indexed: 11/25/2022] Open
Abstract
Diastolic dysfunction (DD) underlies heart failure with preserved ejection fraction (HFpEF), a clinical syndrome associated with aging that is becoming more prevalent. Despite extensive clinical studies, no effective treatment exists for HFpEF. Recent findings suggest that oxidative stress contributes to the pathophysiology of DD, but molecular mechanisms underpinning redox-sensitive cardiac remodeling in DD remain obscure. Using transgenic mice with mitochondria-targeted NOX4 overexpression (Nox4TG618) as a model, we demonstrate that NOX4-dependent mitochondrial oxidative stress induces DD in mice as measured by increased E/E', isovolumic relaxation time, Tau Glantz and reduced dP/dtmin while EF is preserved. In Nox4TG618 mice, fragmentation of cardiomyocyte mitochondria, increased DRP1 phosphorylation, decreased expression of MFN2, and a higher percentage of apoptotic cells in the myocardium are associated with lower ATP-driven and maximal mitochondrial oxygen consumption rates, a decrease in respiratory reserve, and a decrease in citrate synthase and Complex I activities. Transgenic mice have an increased concentration of TGFβ and osteopontin in LV lysates, as well as MCP-1 in plasma, which correlates with a higher percentage of LV myocardial periostin- and ACTA2-positive cells compared with wild-type mice. Accordingly, the levels of ECM as measured by Picrosirius Red staining as well as interstitial deposition of collagen I are elevated in the myocardium of Nox4TG618 mice. The LV tissue of Nox4TG618 mice also exhibited increased ICaL current, calpain 2 expression, and altered/disrupted Z-disc structure. As it pertains to human pathology, similar changes were found in samples of LV from patients with DD. Finally, treatment with GKT137831, a specific NOX1 and NOX4 inhibitor, or overexpression of mCAT attenuated myocardial fibrosis and prevented DD in the Nox4TG618 mice. Together, our results indicate that mitochondrial oxidative stress contributes to DD by causing mitochondrial dysfunction, impaired mitochondrial dynamics, increased synthesis of pro-inflammatory and pro-fibrotic cytokines, activation of fibroblasts, and the accumulation of extracellular matrix, which leads to interstitial fibrosis and passive stiffness of the myocardium. Further, mitochondrial oxidative stress increases cardiomyocyte Ca2+ influx, which worsens CM relaxation and raises the LV filling pressure in conjunction with structural proteolytic damage.
Collapse
Affiliation(s)
- Andrey Lozhkin
- 1150 West Medical Center Drive, 7200 Medical Science Research Building III, Department of Internal Medicine, Frankel Cardiovascular Center, University of Michigan, Ann Arbor, MI, 48019, USA
| | - Aleksandr E Vendrov
- 1150 West Medical Center Drive, 7200 Medical Science Research Building III, Department of Internal Medicine, Frankel Cardiovascular Center, University of Michigan, Ann Arbor, MI, 48019, USA
| | - R Ramos-Mondragón
- Department of Pharmacology, University of Michigan, Ann Arbor, MI, USA
| | - Chandrika Canugovi
- 1150 West Medical Center Drive, 7200 Medical Science Research Building III, Department of Internal Medicine, Frankel Cardiovascular Center, University of Michigan, Ann Arbor, MI, 48019, USA
| | - Mark D Stevenson
- 1150 West Medical Center Drive, 7200 Medical Science Research Building III, Department of Internal Medicine, Frankel Cardiovascular Center, University of Michigan, Ann Arbor, MI, 48019, USA
| | - Todd J Herron
- Frankel Cardiovascular Regeneration Core Laboratory, Ann Arbor, MI, 48109, USA
| | - Scott L Hummel
- Department of Internal Medicine, Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, MI, 48109, USA; Ann Arbor Veterans Affairs Health System, Ann Arbor, MI, USA
| | - C Alberto Figueroa
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Dawn E Bowles
- Department of Surgery, Duke University School of Medicine, Durham, NC, USA
| | - Lori L Isom
- Department of Pharmacology, University of Michigan, Ann Arbor, MI, USA; Department of Neurology, University of Michigan, Ann Arbor, MI, USA; Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
| | - Marschall S Runge
- 1150 West Medical Center Drive, 7200 Medical Science Research Building III, Department of Internal Medicine, Frankel Cardiovascular Center, University of Michigan, Ann Arbor, MI, 48019, USA
| | - Nageswara R Madamanchi
- 1150 West Medical Center Drive, 7200 Medical Science Research Building III, Department of Internal Medicine, Frankel Cardiovascular Center, University of Michigan, Ann Arbor, MI, 48019, USA.
| |
Collapse
|
4
|
Vendrov AE, Stevenson MD, Lozhkin A, Hayami T, Holland NA, Yang X, Moss N, Pan H, Wickline SA, Stockand JD, Runge MS, Madamanchi NR, Arendshorst WJ. Renal NOXA1/NOX1 Signaling Regulates Epithelial Sodium Channel and Sodium Retention in Angiotensin II-induced Hypertension. Antioxid Redox Signal 2022; 36:550-566. [PMID: 34714114 PMCID: PMC8978567 DOI: 10.1089/ars.2021.0047] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Aims: NADPH oxidase (NOX)-derived reactive oxygen species (ROS) are implicated in the pathophysiology of hypertension in chronic kidney disease patients. Genetic deletion of NOX activator 1 (Noxa1) subunit of NOX1 decreases ROS under pathophysiological conditions. Here, we investigated the role of NOXA1-dependent NOX1 activity in the pathogenesis of angiotensin II (Ang II)-induced hypertension (AIH) and possible involvement of abnormal renal function. Results: NOXA1 is present in epithelial cells of Henle's thick ascending limb and distal nephron. Telemetry showed lower basal systolic blood pressure (BP) in Noxa1-/-versus wild-type mice. Ang II infusion for 1 and 14 days increased NOXA1/NOX1 expression and ROS in kidney of male but not female wild-type mice. Mean BP increased 30 mmHg in wild-type males, with smaller increases in Noxa1-deficient males and wild-type or Noxa1-/- females. In response to an acute salt load, Na+ excretion was similar in wild-type and Noxa1-/- mice before and 14 days after Ang II infusion. However, Na+ excretion was delayed after 1-2 days of Ang II in male wild-type versus Noxa1-/- mice. Ang II increased epithelial Na+ channel (ENaC) levels and activation in the collecting duct principal epithelial cells of wild-type but not Noxa1-/- mice. Aldosterone induced ROS levels and Noxa1 and Scnn1a expression and ENaC activity in a mouse renal epithelial cell line, responses abolished by Noxa1 small-interfering RNA. Innovation and Conclusion: Ang II activation of renal NOXA1/NOX1-dependent ROS enhances tubular ENaC expression and Na+ reabsorption, leading to increased BP. Attenuation of AIH in females is attributed to weaker NOXA1/NOX1-dependent ROS signaling and efficient natriuresis. Antioxid. Redox Signal. 36, 550-566.
Collapse
Affiliation(s)
- Aleksandr E Vendrov
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Mark D Stevenson
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Andrey Lozhkin
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Takayuki Hayami
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Nathan A Holland
- Department of Cell Biology and Physiology, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Xi Yang
- Department of Cell Biology and Physiology, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Nicholas Moss
- Department of Cell Biology and Physiology, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Hua Pan
- Department of Cardiovascular Sciences, University of South Florida, Tampa, Florida, USA
| | - Samuel A Wickline
- Department of Cardiovascular Sciences, University of South Florida, Tampa, Florida, USA
| | - James D Stockand
- Department of Cellular and Integrative Physiology, University of Texas Health Science Centre at San Antonio, San Antonio, Texas, USA
| | - Marschall S Runge
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Nageswara R Madamanchi
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - William J Arendshorst
- Department of Cell Biology and Physiology, University of North Carolina, Chapel Hill, North Carolina, USA
| |
Collapse
|
5
|
Davis J, Chouman A, Creech J, Monteiro da Rocha A, Ponce-Balbuena D, Jimenez Vazquez EN, Nichols R, Lozhkin A, Madamanchi NR, Campbell KF, Herron TJ. In vitro model of ischemic heart failure using human induced pluripotent stem cell-derived cardiomyocytes. JCI Insight 2021; 6:134368. [PMID: 33878037 PMCID: PMC8262347 DOI: 10.1172/jci.insight.134368] [Citation(s) in RCA: 15] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 04/15/2021] [Indexed: 11/17/2022] Open
Abstract
Human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) have been used extensively to model inherited heart diseases, but hiPSC-CM models of ischemic heart disease are lacking. Here, our objective was to generate an hiPSC-CM model of ischemic heart disease. To this end, hiPSCs were differentiated into functional hiPSC-CMs and then purified using either a simulated ischemia media or by using magnetic antibody-based purification targeting the nonmyocyte population for depletion from the cell population. Flow cytometry analysis confirmed that each purification approach generated hiPSC-CM cultures that had more than 94% cTnT+ cells. After purification, hiPSC-CMs were replated as confluent syncytial monolayers for electrophysiological phenotype analysis and protein expression by Western blotting. The phenotype of metabolic stress-selected hiPSC-CM monolayers recapitulated many of the functional and structural hallmarks of ischemic CMs, including elevated diastolic calcium, diminished calcium transient amplitude, prolonged action potential duration, depolarized resting membrane potential, hypersensitivity to chemotherapy-induced cardiotoxicity, depolarized mitochondrial membrane potential, depressed SERCA2a expression, reduced maximal oxygen consumption rate, and abnormal response to β1-adrenergic receptor stimulation. These findings indicate that metabolic selection of hiPSC-CMs generated cell populations with phenotype similar to what is well known to occur in the setting of ischemic heart failure and thus provide a opportunity for study of human ischemic heart disease.
Collapse
Affiliation(s)
- Justin Davis
- Frankel Cardiovascular Regeneration Core Laboratory, Department of Internal Medicine, Division of Cardiovascular Medicine
| | - Ahmad Chouman
- Frankel Cardiovascular Regeneration Core Laboratory, Department of Internal Medicine, Division of Cardiovascular Medicine
| | - Jeffery Creech
- Frankel Cardiovascular Regeneration Core Laboratory, Department of Internal Medicine, Division of Cardiovascular Medicine
| | - Andre Monteiro da Rocha
- Frankel Cardiovascular Regeneration Core Laboratory, Department of Internal Medicine, Division of Cardiovascular Medicine.,Center for Arrhythmia Research.,Department of Internal Medicine, Division of Cardiovascular Medicine
| | | | | | | | - Andrey Lozhkin
- Department of Internal Medicine, Division of Cardiovascular Medicine
| | | | - Katherine F Campbell
- Frankel Cardiovascular Regeneration Core Laboratory, Department of Internal Medicine, Division of Cardiovascular Medicine.,Center for Arrhythmia Research
| | - Todd J Herron
- Frankel Cardiovascular Regeneration Core Laboratory, Department of Internal Medicine, Division of Cardiovascular Medicine.,Center for Arrhythmia Research.,Department of Internal Medicine, Division of Cardiovascular Medicine.,Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan, USA
| |
Collapse
|
6
|
Vendrov AE, Sumida A, Canugovi C, Lozhkin A, Hayami T, Madamanchi NR, Runge MS. NOXA1-dependent NADPH oxidase regulates redox signaling and phenotype of vascular smooth muscle cell during atherogenesis. Redox Biol 2018; 21:101063. [PMID: 30576919 PMCID: PMC6302039 DOI: 10.1016/j.redox.2018.11.021] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [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: 10/19/2018] [Revised: 11/16/2018] [Accepted: 11/29/2018] [Indexed: 02/07/2023] Open
Abstract
Increased reactive oxygen species (ROS) production and inflammation are key factors in the pathogenesis of atherosclerosis. We previously reported that NOX activator 1 (NOXA1) is the critical functional homolog of p67phox for NADPH oxidase activation in mouse vascular smooth muscle cells (VSMC). Here we investigated the effects of systemic and SMC-specific deletion of Noxa1 on VSMC phenotype during atherogenesis in mice. Neointimal hyperplasia following endovascular injury was lower in Noxa1-deficient mice versus the wild-type following endovascular injury. Noxa1 deletion in Apoe-/- or Ldlr-/- mice fed a Western diet showed 50% reduction in vascular ROS and 30% reduction in aortic atherosclerotic lesion area and aortic sinus lesion volume (P < 0.01). SMC-specific deletion of Noxa1 in Apoe-/- mice (Noxa1SMC-/-/Apoe-/-) similarly decreased vascular ROS levels and atherosclerotic lesion size. TNFα-induced ROS generation, proliferation and migration were significantly attenuated in Noxa1-deficient versus wild-type VSMC. Immunofluorescence analysis of atherosclerotic lesions showed a significant decrease in cells positive for CD68 and myosin11 (22% versus 9%) and Mac3 and α-actin (17% versus 5%) in the Noxa1SMC-/-/Apoe-/- versus Apoe-/- mice. The expression of transcription factor KLF4, a modulator of VSMC phenotype, and its downstream targets – VCAM1, CCL2, and MMP2 – were significantly reduced in the lesions of Noxa1SMC-/-/Apoe-/- versus Apoe-/- mice as well as in oxidized phospholipids treated Noxa1SMC-/- versus wild-type VSMC. Our data support an important role for NOXA1-dependent NADPH oxidase activity in VSMC plasticity during restenosis and atherosclerosis, augmenting VSMC proliferation and migration and KLF4-mediated transition to macrophage-like cells, plaque inflammation, and expansion. NOXA1 is a VSMC-specific regulator of NADPH oxidase 1 activity and downstream cell signaling. NOX1 NADPH oxidase-dependent ROS generation is required for VSMC proliferation and migration after endovascular injury. NOXA1-dependent NOX1 activation of KLF4 in atherosclerotic lesions induces SMC phenotypic switch to macrophage-like cells. Atherosclerotic lesion macrophage-like cells promote plaque inflammation, matrix remodeling and increase volume expansion.
Collapse
Affiliation(s)
- Aleksandr E Vendrov
- Frankel Cardiovascular Center, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Arihiro Sumida
- Frankel Cardiovascular Center, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Chandrika Canugovi
- Frankel Cardiovascular Center, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Andrey Lozhkin
- Frankel Cardiovascular Center, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Takayuki Hayami
- Frankel Cardiovascular Center, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Nageswara R Madamanchi
- Frankel Cardiovascular Center, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Marschall S Runge
- Frankel Cardiovascular Center, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA.
| |
Collapse
|
7
|
Lozhkin A, Vendrov AE, Pan H, Wickline SA, Madamanchi NR, Runge MS. NADPH oxidase 4 regulates vascular inflammation in aging and atherosclerosis. J Mol Cell Cardiol 2016; 102:10-21. [PMID: 27986445 PMCID: PMC5625334 DOI: 10.1016/j.yjmcc.2016.12.004] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [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: 03/23/2016] [Revised: 12/08/2016] [Accepted: 12/12/2016] [Indexed: 01/10/2023]
Abstract
We recently reported that increased NADPH oxidase 4 (NOX4) expression and activity during aging results in enhanced cellular and mitochondrial oxidative stress, vascular inflammation, dysfunction, and atherosclerosis. The goal of the present study was to elucidate the molecular mechanism(s) for these effects and determine the importance of NOX4 modulation of proinflammatory gene expression in mouse vascular smooth muscle cells (VSMCs). A novel peptide-mediated siRNA transfection approach was used to inhibit Nox4 expression with minimal cellular toxicity. Using melittin-derived peptide p5RHH, we achieved significantly higher transfection efficiency (92% vs. 85% with Lipofectamine) and decreased toxicity (p<0.001 vs. Lipofectamine in MTT and p<0.0001 vs. Lipofectamine in LDH assays) in VSMCs. TGFβ1 significantly upregulates Nox4 mRNA (p<0.01) and protein (p<0.01) expression in VSMCs. p5RHH-mediated Nox4 siRNA transfection greatly attenuated TGFβ1-induced upregulation of Nox4 mRNA (p<0.01) and protein (p<0.0001) levels and decreased hydrogen peroxide production (p<0.0001). Expression of pro-inflammatory genes Ccl2, Ccl5, Il6, and Vcam1 was significantly upregulated in VSMCs in several settings cells isolated from aged vs. young wild-type mice, in atherosclerotic arteries of Apoe-/- mice, and atherosclerotic human carotid arteries and correlated with NOX4 expression. p5RHH-mediated Nox4 siRNA transfection significantly attenuated the expression of these pro-inflammatory genes in TGFβ1-treated mouse VSMCs, with the highest degree of inhibition in the expression of Il6. p5RHH peptide-mediated knockdown of TGFβ-activated kinase 1 (TAK1, also known as Map3k7), Jun, and Rela, but not Nfkb2, downregulated TGFβ1-induced Nox4 expression in VSMCs. Together, these data demonstrate that increased expression and activation of NOX4, which might result from increased TGFβ1 levels seen during aging, induces a proinflammatory phenotype in VSMCs, enhancing atherosclerosis.
Collapse
Affiliation(s)
- Andrey Lozhkin
- Frankel Cardiovascular Center, Department of Internal Medicine, University of Michigan, Ann Arbor 48109, MI, USA
| | - Aleksandr E Vendrov
- Frankel Cardiovascular Center, Department of Internal Medicine, University of Michigan, Ann Arbor 48109, MI, USA
| | - Hua Pan
- Division of Cardiology, Department of Medicine, Washington University School of Medicine, Saint Louis 63110, MO, USA
| | - Samuel A Wickline
- Division of Cardiology, Department of Medicine, Washington University School of Medicine, Saint Louis 63110, MO, USA
| | - Nageswara R Madamanchi
- Frankel Cardiovascular Center, Department of Internal Medicine, University of Michigan, Ann Arbor 48109, MI, USA
| | - Marschall S Runge
- Frankel Cardiovascular Center, Department of Internal Medicine, University of Michigan, Ann Arbor 48109, MI, USA.
| |
Collapse
|
8
|
Wolf D, Jehle F, Ortiz Rodriguez A, Dufner B, Hoppe N, Colberg C, Lozhkin A, Bassler N, Rupprecht B, Wiedemann A, Hilgendorf I, Stachon P, Willecke F, Febbraio M, Binder CJ, Bode C, Zirlik A, Peter K. CD40L deficiency attenuates diet-induced adipose tissue inflammation by impairing immune cell accumulation and production of pathogenic IgG-antibodies. PLoS One 2012; 7:e33026. [PMID: 22412980 PMCID: PMC3297623 DOI: 10.1371/journal.pone.0033026] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Accepted: 02/09/2012] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Adipose tissue inflammation fuels the metabolic syndrome. We recently reported that CD40L--an established marker and mediator of cardiovascular disease--induces inflammatory cytokine production in adipose cells in vitro. Here, we tested the hypothesis that CD40L deficiency modulates adipose tissue inflammation in vivo. METHODOLOGY/PRINCIPAL FINDINGS WT or CD40L(-/-) mice consumed a high fat diet (HFD) for 20 weeks. Inflammatory cell recruitment was impaired in mice lacking CD40L as shown by a decrease of adipose tissue macrophages, B-cells, and an increase in protective T-regulatory cells. Mechanistically, CD40L-deficient mice expressed significantly lower levels of the pro-inflammatory chemokine MCP-1 both, locally in adipose tissue and systemically in plasma. Moreover, levels of pro-inflammatory IgG-antibodies against oxidized lipids were reduced in CD40L(-/-) mice. Also, circulating low-density lipoproteins and insulin levels were lower in CD40L(-/-) mice. However, CD40L(-/-) mice consuming HFD were not protected from the onset of diet-induced obesity (DIO), insulin resistance, and hepatic steatosis, suggesting that CD40L selectively limits the inflammatory features of diet-induced obesity rather than its metabolic phenotype. Interestingly, CD40L(-/-) mice consuming a low fat diet (LFD) showed both, a favorable inflammatory and metabolic phenotype characterized by diminished weight gain, improved insulin tolerance, and attenuated plasma adipokine levels. CONCLUSION We present the novel finding that CD40L deficiency limits adipose tissue inflammation in vivo. These findings identify CD40L as a potential mediator at the interface of cardiovascular and metabolic disease.
Collapse
Affiliation(s)
- Dennis Wolf
- Atherogenesis Research Group, Department of Cardiology, University of Freiburg, Freiburg, Germany
| | - Felix Jehle
- Atherogenesis Research Group, Department of Cardiology, University of Freiburg, Freiburg, Germany
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
| | | | - Bianca Dufner
- Atherogenesis Research Group, Department of Cardiology, University of Freiburg, Freiburg, Germany
| | - Natalie Hoppe
- Atherogenesis Research Group, Department of Cardiology, University of Freiburg, Freiburg, Germany
| | - Christian Colberg
- Atherogenesis Research Group, Department of Cardiology, University of Freiburg, Freiburg, Germany
| | - Andrey Lozhkin
- Atherogenesis Research Group, Department of Cardiology, University of Freiburg, Freiburg, Germany
| | - Nicole Bassler
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
| | - Benjamin Rupprecht
- Atherogenesis Research Group, Department of Cardiology, University of Freiburg, Freiburg, Germany
| | - Ansgar Wiedemann
- Atherogenesis Research Group, Department of Cardiology, University of Freiburg, Freiburg, Germany
| | - Ingo Hilgendorf
- Atherogenesis Research Group, Department of Cardiology, University of Freiburg, Freiburg, Germany
| | - Peter Stachon
- Atherogenesis Research Group, Department of Cardiology, University of Freiburg, Freiburg, Germany
| | - Florian Willecke
- Atherogenesis Research Group, Department of Cardiology, University of Freiburg, Freiburg, Germany
| | - Mark Febbraio
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
| | - Christoph J. Binder
- Department of Laboratory Medicine, Medical University of Vienna and Center for Molecular Medicine, Austrian Academy of Sciences, Vienna, Austria
| | - Christoph Bode
- Atherogenesis Research Group, Department of Cardiology, University of Freiburg, Freiburg, Germany
| | - Andreas Zirlik
- Atherogenesis Research Group, Department of Cardiology, University of Freiburg, Freiburg, Germany
| | - Karlheinz Peter
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
| |
Collapse
|
9
|
Hilgendorf I, Eisele S, Remer I, Schmitz J, Zeschky K, Colberg C, Stachon P, Wolf D, Willecke F, Buchner M, Zirlik K, Ortiz-Rodriguez A, Lozhkin A, Hoppe N, von zur Muhlen C, zur Hausen A, Bode C, Zirlik A. The oral spleen tyrosine kinase inhibitor fostamatinib attenuates inflammation and atherogenesis in low-density lipoprotein receptor-deficient mice. Arterioscler Thromb Vasc Biol 2011; 31:1991-9. [PMID: 21700926 DOI: 10.1161/atvbaha.111.230847] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
OBJECTIVE Spleen tyrosine kinase (SYK) has come into focus as a potential therapeutic target in chronic inflammatory diseases, such as rheumatoid arthritis and asthma, as well as in B-cell lymphomas. SYK has also been involved in the signaling of immunoreceptors, cytokine receptors, and integrins. We therefore hypothesized that inhibition of SYK attenuates the inflammatory process underlying atherosclerosis and reduces plaque development. METHODS AND RESULTS Low-density lipoprotein receptor-deficient mice consuming a high-cholesterol diet supplemented with 2 doses of the orally available SYK inhibitor fostamatinib for 16 weeks showed a dose-dependent reduction in atherosclerotic lesion size by up to 59±6% compared with the respective controls. Lesions of fostamatinib-treated animals contained fewer macrophages but more smooth muscle cells and collagen-characteristics associated with more stable plaques in humans. Mechanistically, fostamatinib attenuated adhesion and migration of inflammatory cells and limited macrophage survival. Furthermore, fostamatinib normalized high-cholesterol diet -induced monocytosis and inflammatory gene expression. CONCLUSIONS We present the novel finding that the SYK inhibitor fostamatinib attenuates atherogenesis in mice. Our data identify SYK inhibition as a potentially fruitful antiinflammatory therapeutic strategy in atherosclerosis.
Collapse
Affiliation(s)
- Ingo Hilgendorf
- Department of Cardiology, University Hospital Freiburg, Freiburg, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Lozhkin A. [In step with life]. Voen Med Zh 1967; 6:26. [PMID: 5604721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|