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Zhang H, Hao J, Hong H, Gu W, Li Z, Sun J, Zhan H, Wei X, Zhou L. Redox signaling regulates the skeletal tissue development and regeneration. Biotechnol Genet Eng Rev 2023:1-24. [PMID: 37043672 DOI: 10.1080/02648725.2023.2199244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Skeletal tissue development and regeneration in mammals are intricate, multistep, and highly regulated processes. Various signaling pathways have been implicated in the regulation of these processes, including redox. Redox signaling is the signal transduction by electron transfer reactions involving free radicals or related species. Redox homeostasis is essential to cell metabolic states, as the ROS not only regulates cell biological processes but also mediates physiological processes. Following a bone fracture, redox signaling is also triggered to regulate bone healing and regeneration by targeting resident stromal cells, osteoblasts, osteoclasts and endothelial cells. This review will focus on how the redox signaling impact the bone development and bone regeneration.
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Affiliation(s)
- Hao Zhang
- Department of Orthopedics, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, East China, Shanghai, China
| | - Jin Hao
- Department of Orthopedics, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, East China, Shanghai, China
| | - HaiPing Hong
- FangTa Hospital of Traditional Chinese Medicine, Songjiang Branch, Shanghai, East China, China
| | - Wei Gu
- Department of Orthopedics, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, East China, Shanghai, China
| | | | - Jun Sun
- Department of Orthopedics, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, East China, Shanghai, China
| | - Hongsheng Zhan
- Department of Orthopedics, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, East China, Shanghai, China
| | - Xiaoen Wei
- Department of Orthopedics, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, East China, Shanghai, China
| | - Lin Zhou
- Department of Orthopedics, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, East China, Shanghai, China
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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] [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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Kadir RRA, Alwjwaj M, Bayraktutan U. Protein kinase C-β distinctly regulates blood-brain barrier-forming capacity of Brain Microvascular endothelial cells and outgrowth endothelial cells. Metab Brain Dis 2022; 37:1815-1827. [PMID: 35763197 PMCID: PMC9283364 DOI: 10.1007/s11011-022-01041-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Accepted: 06/17/2022] [Indexed: 01/16/2023]
Abstract
Outgrowth endothelial cells (OECs) provide an endogenous repair mechanism and thus maintain endothelial barrier integrity. As inhibition of protein kinase C-β (PKC-β) activity has been shown to attenuate endothelial damage in various pathological conditions including hyperglycaemia and ischaemic injury, the present study comparatively assessed the effect of LY333531, a PKC-β inhibitor, on the cerebral barrier integrity formed by OECs or human brain microvascular endothelial cells (HBMECs). To this end, an in vitro model of human BBB established by co-culture of astrocytes and pericytes with either OECs or HBMECs was exposed to 4 h of oxygen-glucose deprivation with/out LY333531 (0.05 µM). The inhibition of PKC-β protected the integrity and function of the BBB formed by HBMECs, as evidenced by increases in transendothelial electrical resistance and decreases in sodium fluorescein flux. It also attenuated ischaemia-evoked actin cytoskeleton remodelling, oxidative stress, and apoptosis in HBMECs. In contrast, treatments with LY333531 exacerbated the deleterious effect of ischaemia on the integrity and function of BBB formed by OECs while augmenting the levels of oxidative stress, apoptosis, and cytoskeletal reorganisation in OECs. Interestingly, the magnitude of damage in all aforementioned parameters, notably oxidative stress, was lower with low dose of LY333531 (0.01 µM). It is therefore possible that the therapeutic concentration of LY333531 (0.05 µM) may neutralise the activity of NADPH oxidase and thus trigger a negative feedback mechanism which in turn exacerbate the detrimental effects of ischaemic injury. In conclusion, targeting PKC-β signalling pathway in ischaemic settings requires close attention while using OECs as cellular therapeutic.
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Affiliation(s)
- Rais Reskiawan A Kadir
- Academic Unit of Mental Health and Clinical Neuroscience, The University of Nottingham, Nottingham, UK
| | - Mansour Alwjwaj
- Academic Unit of Mental Health and Clinical Neuroscience, The University of Nottingham, Nottingham, UK
| | - Ulvi Bayraktutan
- Academic Unit of Mental Health and Clinical Neuroscience, The University of Nottingham, Nottingham, UK.
- Academic Unit of Mental Health and Clinical Neuroscience, Clinical Sciences Building, School of Medicine, The University of Nottingham, Hucknall Road, NG5 1PB, Nottingham, UK.
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Yingze Y, Zhihong J, Tong J, Yina L, Zhi Z, Xu Z, Xiaoxing X, Lijuan G. NOX2-mediated reactive oxygen species are double-edged swords in focal cerebral ischemia in mice. J Neuroinflammation 2022; 19:184. [PMID: 35836200 PMCID: PMC9281066 DOI: 10.1186/s12974-022-02551-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Accepted: 07/05/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Reactive oxygen species (ROS) often promote acute brain injury after stroke, but their roles in the recovery phase have not been well studied. We tested the hypothesis that ROS activity mediated by NADPH oxidase 2 (NOX2) contributes to acute brain injury but promotes functional recovery during the delayed phase, which is linked with neuroinflammation, autophagy, angiogenesis, and the PI3K/Akt signaling pathway. METHODS We used the NOX2 inhibitor apocynin to study the role of NOX2 in brain injury and functional recovery in a middle cerebral artery occlusion (MCAO) stroke mouse model. Infarct size, neurological deficits and behavior were evaluated on days 3, 7, 10 and 14 after reperfusion. In addition, dynamic NOX2-induced ROS levels were measured by dihydroethidium (DHE) staining. Autophagy, inflammasomes, and angiogenesis were measured by immunofluorescence staining and western blotting. RNA sequencing was performed, and bioinformatics technology was used to analyze differentially expressed genes (DEGs), as well as the enrichment of biological functions and signaling pathways in ischemia penumbra at 7 days after reperfusion. Then, Akt pathway-related proteins were further evaluated by western blotting. RESULTS Our results showed that apocynin injection attenuated infarct size and mortality 3 days after stroke but promoted mortality and blocked functional recovery from 5 to 14 days after stroke. DHE staining showed that ROS levels were increased at 3 days after reperfusion and then gradually declined in WT mice, and these levels were significantly reduced by the NOX2 inhibitor apocynin. RNA-Seq analysis indicated that apocynin activated the immune response under hypoxic conditions. The immunofluorescence and western blot results demonstrated that apocynin inhibited the NLRP3 inflammasome and promoted angiogenesis at 3 days but promoted the NLRP3 inflammasome and inhibited angiogenesis at 7 and 14 days after stroke, which was mediated by regulating autophagy activation. Furthermore, RNA-Seq and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis indicated that apocynin injection resulted in PI3K-Akt signaling pathway enrichment after 7 days of MCAO. We then used an animal model to show that apocynin decreased the protein levels of phosphorylated PI3K and Akt and NF-κB p65, confirming that the PI3K-Akt-NF-κB pathway is involved in apocynin-mediated activation of inflammation and inhibition of angiogenesis. CONCLUSIONS NOX2-induced ROS production is a double-edged sword that exacerbates brain injury in the acute phase but promotes functional recovery. This effect appears to be achieved by inhibiting NLRP3 inflammasome activation and promoting angiogenesis via autophagy activation.
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Affiliation(s)
- Ye Yingze
- Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, 430060, China.,Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Jian Zhihong
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Jin Tong
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Li Yina
- Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, 430060, China.,Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Zeng Zhi
- Department of Pathology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Zhang Xu
- Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, 430060, China.,Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Xiong Xiaoxing
- Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, 430060, China. .,Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, 430060, China.
| | - Gu Lijuan
- Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, 430060, China.
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Cung T, Wang H, Hartnett ME. The Effects of Nicotinamide Adenine Dinucleotide Phosphate (NADPH) Oxidase and Erythropoietin, and Their Interactions in Angiogenesis: Implications in Retinopathy of Prematurity. Cells 2022; 11:cells11121951. [PMID: 35741081 PMCID: PMC9222209 DOI: 10.3390/cells11121951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/07/2022] [Accepted: 06/10/2022] [Indexed: 01/27/2023] Open
Abstract
Retinopathy of prematurity (ROP) is a leading cause of vision impairment and blindness in premature infants. Oxidative stress is implicated in its pathophysiology. NADPH oxidase (NOX), a major enzyme responsible for reactive oxygen species (ROS) generation in endothelial cells, has been studied for its involvement in physiologic and pathologic angiogenesis. Erythropoietin (EPO) has gained interest recently due to its tissue protective and angiogenic effects, and it has been shown to act as an antioxidant. In this review, we summarize studies performed over the last five years regarding the role of various NOXs in physiologic and pathologic angiogenesis. We also discuss the effect of EPO in tissue and vasoprotection, and the intersection of EPO and NOX-mediated oxidative stress in angiogenesis and the pathophysiology of ROP.
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6
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MicroRNAs and exosomes: Cardiac stem cells in heart diseases. Pathol Res Pract 2021; 229:153701. [PMID: 34872024 DOI: 10.1016/j.prp.2021.153701] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 11/09/2021] [Accepted: 11/18/2021] [Indexed: 12/20/2022]
Abstract
Treating cardiovascular diseases with cardiac stem cells (CSCs) is a valid treatment among various stem cell-based therapies. With supplying the physiological need for cardiovascular cells as their main function, under pathological circumstances, CSCs can also reproduce the myocardial cells. Although studies have identified many of CSCs' functions, our knowledge of molecular pathways that regulate these functions is not complete enough. Either physiological or pathological studies have shown, stem cells proliferation and differentiation could be regulated by microRNAs (miRNAs). How miRNAs regulate CSC behavior is an interesting area of research that can help us study and control the function of these cells in vitro; an achievement that may be beneficial for patients with cardiovascular diseases. The secretome of stem and progenitor cells has been studied and it has been determined that exosomes are the main source of their secretion which are very small vesicles at the nanoscale and originate from endosomes, which are secreted into the extracellular space and act as key signaling organelles in intercellular communication. Mesenchymal stem cells, cardiac-derived progenitor cells, embryonic stem cells, induced pluripotent stem cells (iPSCs), and iPSC-derived cardiomyocytes release exosomes that have been shown to have cardioprotective, immunomodulatory, and reparative effects. Herein, we summarize the regulation roles of miRNAs and exosomes in cardiac stem cells.
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Effect of erythropoietin administration on expression of mRNA brain-derived Neutrophic factor, levels of stromal cell-derived Factor-1, and neuron specific enolase in brain injury model Sprague Dawley. Ann Med Surg (Lond) 2021; 70:102877. [PMID: 34691421 PMCID: PMC8519762 DOI: 10.1016/j.amsu.2021.102877] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 09/18/2021] [Accepted: 09/19/2021] [Indexed: 01/16/2023] Open
Abstract
Background Traumatic brain injury (TBI) is a complicated condition that is the primary cause of death and disability in children and young adults in developed countries. Various kinds of therapy have been carried out in the management of brain injury, one of which is the administration of erythropoietin (EPO). There are not many studies in Indonesia have proven that EPO administration is effective on parameters such as stromal cell-derived factor 1 (SDF-1), brain-derived neurotrophic factor (BDNF mRNA), and neuron-specific enolase (NSE) in brain injury patients. The purpose of this study was to see how EPO affected BDNF mRNA expression, SDF-1 serum levels, and NSE levels in experimental rats with TBI. Methods This study was conducted using a rat head injury model. Fifteen rats were randomly assigned to one of three groups: A, B, or C. EPO was administered subcutis with a dose of 30.000 U/kg. Blood samples were taken after brain injury (H0), 12 h (H12), and 24 h (H24) after brain injury. Serum level of SDF-1 and NSE were measured using mRNA BDNF gene expression was measured with Real-Time-PCR, and ELISA. Results This study found EPO increase BDNF mRNA expression in group C at H-12 (7,92 ± 0.51 vs 6.45 ± 0.33) compared to group B, and at H-24 (9.20 ± 0.56 vs 7.22 ± 0.19); increase SDF-1 levels in group C at H-12 (7,56 ± 0,54) vs 4,62 ± 0,58) compared to group B, and at H-24 (11,32 ± 4,55 vs 2,55 ± 0,70); decrease serum NSE levels in group C at H-12 (17,25 ± 2,02 vs 29,65 ± 2,33) compare to group B and at H-24 (12,14 ± 2,61 vs 37,31 ± 2,76); the values are significantly different with p < 0,05. Conclusion EPO may have neuroprotective and anti-inflammatory properties in TBI by increasing mRNA BDNF expression and serum SDF-1 levels, and decrease serum NSE levels. Traumatic brain injury (TBI) is a major cause of death and lifelong disability. Erythropoietin (EPO) increasing mRNA BDNF expression and serum SDF-1 levels. EPO decrease serum NSE levels. Erythropoietin may have neuroprotective and anti-inflammatory properties.
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Regulation of Rac1 Activation in Choroidal Endothelial Cells: Insights into Mechanisms in Age-Related Macular Degeneration. Cells 2021; 10:cells10092414. [PMID: 34572063 PMCID: PMC8469925 DOI: 10.3390/cells10092414] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 12/11/2022] Open
Abstract
Age-related macular degeneration (AMD) is one of the leading causes of blindness worldwide. Vision loss from the neovascular form is associated with the invasion of choroidal endothelial cells into the neural retina to form vision-threatening macular neovascularization (MNV). Anti-angiogenic agents are the current standard of care but are effective in only ~50% of AMD cases. The molecular mechanisms involved in invasive MNV point to the importance of regulating signaling pathways that lead to pathologic biologic outcomes. In studies testing the effects of AMD-related stresses, activation of the Rho GTPase, Rac1, was found to be important for the choroidal endothelial cell invasion into the neural retina. However, current approaches to prevent Rac1 activation are inefficient and less effective. We summarize active Rac1-mediated mechanisms that regulate choroidal endothelial cell migration. Specifically, we discuss our work regarding the role of a multidomain protein, IQ motif containing GTPase activating protein 1 (IQGAP1), in sustaining pathologic Rac1 activation and a mechanism by which active Rap1, a Ras-like GTPase, may prevent active Rac1-mediated choroidal endothelial cell migration.
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Ding R, Yin YL, Jiang LH. Reactive Oxygen Species-Induced TRPM2-Mediated Ca 2+ Signalling in Endothelial Cells. Antioxidants (Basel) 2021; 10:antiox10050718. [PMID: 34063677 PMCID: PMC8147627 DOI: 10.3390/antiox10050718] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/21/2021] [Accepted: 04/28/2021] [Indexed: 02/07/2023] Open
Abstract
Endothelial cells form the innermost layer of blood vessels with a fundamental role as the physical barrier. While regulation of endothelial cell function by reactive oxygen species (ROS) is critical in physiological processes such as angiogenesis, endothelial function is a major target for interruption by oxidative stress resulting from generation of high levels of ROS in endothelial cells by various pathological factors and also release of ROS by neutrophils. TRPM2 is a ROS-sensitive Ca2+-permeable channel expressed in endothelial cells of various vascular beds. In this review, we provide an overview of the TRPM2 channel and its role in mediating ROS-induced Ca2+ signaling in endothelial cells. We discuss the TRPM2-mediated Ca2+ signaling in vascular endothelial growth factor-induced angiogenesis and in post-ischemic neovascularization. In particular, we examine the accumulative evidence that supports the role of TRPM2-mediated Ca2+ signaling in endothelial cell dysfunction caused by various oxidative stress-inducing factors that are associated with tissue inflammation, obesity and diabetes, as well as air pollution. These findings provide new, mechanistic insights into ROS-mediated regulation of endothelial cells in physiology and diseases.
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Affiliation(s)
- Ran Ding
- Department of Physiology and Pathophysiology, Sino-UK Joint Laboratory of Brain Function and Injury of Henan Province, Xinxiang Medical University, Xinxiang 453003, China; (R.D.); (Y.-L.Y.)
| | - Ya-Ling Yin
- Department of Physiology and Pathophysiology, Sino-UK Joint Laboratory of Brain Function and Injury of Henan Province, Xinxiang Medical University, Xinxiang 453003, China; (R.D.); (Y.-L.Y.)
| | - Lin-Hua Jiang
- Department of Physiology and Pathophysiology, Sino-UK Joint Laboratory of Brain Function and Injury of Henan Province, Xinxiang Medical University, Xinxiang 453003, China; (R.D.); (Y.-L.Y.)
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK
- Correspondence: ; Tel.: +44-113-3434-231
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Fadini GP, Mehta A, Dhindsa DS, Bonora BM, Sreejit G, Nagareddy P, Quyyumi AA. Circulating stem cells and cardiovascular outcomes: from basic science to the clinic. Eur Heart J 2020; 41:4271-4282. [PMID: 31891403 PMCID: PMC7825095 DOI: 10.1093/eurheartj/ehz923] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 10/19/2019] [Accepted: 12/05/2019] [Indexed: 02/06/2023] Open
Abstract
The cardiovascular and haematopoietic systems have fundamental inter-relationships during development, as well as in health and disease of the adult organism. Although haematopoietic stem cells (HSCs) emerge from a specialized haemogenic endothelium in the embryo, persistence of haemangioblasts in adulthood is debated. Rather, the vast majority of circulating stem cells (CSCs) is composed of bone marrow-derived HSCs and the downstream haematopoietic stem/progenitors (HSPCs). A fraction of these cells, known as endothelial progenitor cells (EPCs), has endothelial specification and vascular tropism. In general, the levels of HSCs, HSPCs, and EPCs are considered indicative of the endogenous regenerative capacity of the organism as a whole and, particularly, of the cardiovascular system. In the last two decades, the research on CSCs has focused on their physiologic role in tissue/organ homoeostasis, their potential application in cell therapies, and their use as clinical biomarkers. In this review, we provide background information on the biology of CSCs and discuss in detail the clinical implications of changing CSC levels in patients with cardiovascular risk factors or established cardiovascular disease. Of particular interest is the mounting evidence available in the literature on the close relationships between reduced levels of CSCs and adverse cardiovascular outcomes in different cohorts of patients. We also discuss potential mechanisms that explain this association. Beyond CSCs' ability to participate in cardiovascular repair, levels of CSCs need to be interpreted in the context of the broader connections between haematopoiesis and cardiovascular function, including the role of clonal haematopoiesis and inflammatory myelopoiesis.
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Affiliation(s)
- Gian Paolo Fadini
- Department of Medicine, University of Padova, Via Giustiniani 2, 35128 Padova, Italy
| | - Anurag Mehta
- Division of Cardiology, Department of Medicine, Emory Clinical Cardiovascular Research Institute, Emory University School of Medicine, 201 Dowman Drive, Atlanta, GA 30322, USA
| | - Devinder Singh Dhindsa
- Division of Cardiology, Department of Medicine, Emory Clinical Cardiovascular Research Institute, Emory University School of Medicine, 201 Dowman Drive, Atlanta, GA 30322, USA
| | | | - Gopalkrishna Sreejit
- Division of Cardiac Surgery, Department of Surgery, Ohio State University, Columbus, OH 43210, USA
| | - Prabhakara Nagareddy
- Division of Cardiac Surgery, Department of Surgery, Ohio State University, Columbus, OH 43210, USA
| | - Arshed Ali Quyyumi
- Division of Cardiology, Department of Medicine, Emory Clinical Cardiovascular Research Institute, Emory University School of Medicine, 201 Dowman Drive, Atlanta, GA 30322, USA
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Duan J, Chen Z, Liang X, Chen Y, Li H, Tian X, Zhang M, Wang X, Sun H, Kong D, Li Y, Yang J. Construction and application of therapeutic metal-polyphenol capsule for peripheral artery disease. Biomaterials 2020; 255:120199. [DOI: 10.1016/j.biomaterials.2020.120199] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 04/02/2020] [Accepted: 06/09/2020] [Indexed: 01/10/2023]
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12
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IQGAP1 causes choroidal neovascularization by sustaining VEGFR2-mediated Rac1 activation. Angiogenesis 2020; 23:685-698. [PMID: 32783108 DOI: 10.1007/s10456-020-09740-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 08/01/2020] [Indexed: 01/31/2023]
Abstract
Loss of visual acuity in neovascular age-related macular degeneration (nAMD) occurs when factors activate choroidal endothelial cells (CECs) to transmigrate the retinal pigment epithelium into the sensory retina and develop into choroidal neovascularization (CNV). Active Rac1 (Rac1GTP) is required for CEC migration and is induced by different AMD-related stresses, including vascular endothelial growth factor (VEGF). Besides its role in pathologic events, Rac1 also plays a role in physiologic functions. Therefore, we were interested in a method to inhibit pathologic activation of Rac1. We addressed the hypothesis that IQGAP1, a scaffold protein with a Rac1 binding domain, regulates pathologic Rac1GTP in CEC migration and CNV. Compared to littermate Iqgap1+/+, Iqgap1-/- mice had reduced volumes of laser-induced CNV and decreased Rac1GTP and phosphorylated VEGFR2 (p-VEGFR2) within lectin-stained CNV. Knockdown of IQGAP1 in CECs significantly reduced VEGF-induced Rac1GTP, mediated through p-VEGFR2, which was necessary for CEC migration. Moreover, sustained activation of Rac1GTP induced by VEGF was eliminated when CECs were transfected with an IQGAP1 construct that is unable to bind Rac1. IQGAP1-mediated Src activation was involved in initiating Rac1 activation, CEC migration, and tube formation. Our findings indicate that CEC IQGAP1 interacts with VEGFR2 to mediate Src activation and subsequent Rac1 activation and CEC migration. In addition, IQGAP1 binding to Rac1GTP results in sustained activation of Rac1, leading to CEC migration toward VEGF. Our study supports a role of IQGAP1 and the interaction between IQGAP1 and Rac1GTP to restore CECs quiescence and, therefore, prevent vision-threatening CNV in nAMD.
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ROS-responsive capsules engineered from EGCG-Zinc networks improve therapeutic angiogenesis in mouse limb ischemia. Bioact Mater 2020; 6:1-11. [PMID: 32817909 PMCID: PMC7415630 DOI: 10.1016/j.bioactmat.2020.07.013] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 07/01/2020] [Accepted: 07/22/2020] [Indexed: 12/20/2022] Open
Abstract
The successful treatment of limb ischemia requires that promote angiogenesis along with microenvironment improvement. Zinc ions have been reported to stimulate angiogenesis, but application was limited to the toxicity concerns. We hypothesized that zinc based metal-EGCG capsule (EGCG/Zn Ps) can achieve sustained release Zn2+ resulting in reduced toxicity and improve angiogenesis as well as the improvement of microenvironment by ROS scavenging of EGCG. The surface morphology, zeta potential, infrared absorbance peaks and zinc ion release profile of the EGCG/Zn Ps were measured. In vitro, EGCG/Zn showed significantly antioxidant, anti-inflammatory and induced cell migration effect. In addition, EGCG/Zn Ps enabled the sustained release of zinc ions, which reduced cytotoxicity and enhanced the secretion of vascular endothelial growth factor (VEGF) in vitro and in vivo. In mouse models of limb ischemia, EGCG/Zn Ps promoted angiogenesis and cell proliferation in ischemic tissues. Moreover, EGCG/Zn Ps group exhibited the most significant recovery of limb ischemic score, limb temperature and blood flow than other groups. In conclusion, EGCG/Zn Ps is a safe and promising approach to combine the merit of Zn2+ and EGCG, thus enabling the direct application to limb ischemia. Metal-polyphenol networks have been firstly applied in the Limb ischemic disease. EGCG improve the microenvironment of ischemic whereas Zinc exerts angiogenic property. •The slowly release of zinc ions were achieved, resulting in better biocompatibility.
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Cross-Talk between NADPH Oxidase and Mitochondria: Role in ROS Signaling and Angiogenesis. Cells 2020; 9:cells9081849. [PMID: 32781794 PMCID: PMC7466096 DOI: 10.3390/cells9081849] [Citation(s) in RCA: 159] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 07/27/2020] [Accepted: 08/05/2020] [Indexed: 02/07/2023] Open
Abstract
Angiogenesis, a new vessel formation from the pre-existing ones, is essential for embryonic development, wound repair and treatment of ischemic heart and limb diseases. However, dysregulated angiogenesis contributes to various pathologies such as diabetic retinopathy, atherosclerosis and cancer. Reactive oxygen species (ROS) derived from NADPH oxidase (NOX) as well as mitochondria play an important role in promoting the angiogenic switch from quiescent endothelial cells (ECs). However, how highly diffusible ROS produced from different sources and location can communicate with each other to regulate angiogenesis remains unclear. To detect a localized ROS signal in distinct subcellular compartments in real time in situ, compartment-specific genetically encoded redox-sensitive fluorescence biosensors have been developed. Recently, the intercellular communication, “cross-talk”, between ROS derived from NOX and mitochondria, termed “ROS-induced ROS release”, has been proposed as a mechanism for ROS amplification at distinct subcellular compartments, which are essential for activation of redox signaling. This “ROS-induced ROS release” may represent a feed-forward mechanism of localized ROS production to maintain sustained signaling, which can be targeted under pathological conditions with oxidative stress or enhanced to promote therapeutic angiogenesis. In this review, we summarize the recent knowledge regarding the role of the cross-talk between NOX and mitochondria organizing the sustained ROS signaling involved in VEGF signaling, neovascularization and tissue repair.
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Vilchis-Landeros M, Guinzberg R, Riveros-Rosas H, Villalobos-Molina R, Piña E. Aquaporin 8 is involved in H 2 O 2 -mediated differential regulation of metabolic signaling by α 1 - and β-adrenoceptors in hepatocytes. FEBS Lett 2020; 594:1564-1576. [PMID: 32115689 DOI: 10.1002/1873-3468.13763] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 01/16/2020] [Accepted: 02/12/2020] [Indexed: 12/20/2022]
Abstract
Reactive oxygen species participate in regulating intracellular signaling pathways. Herein, we investigated the reported opposite effects of hydrogen peroxide (H2 O2 ) on metabolic signaling mediated by activated α1 - and β-adrenoceptors (ARs) in hepatocytes. In isolated rat hepatocytes, stimulation of α1 -AR increases H2 O2 production via NADPH oxidase 2 (NOX2) activation. We find that the H2 O2 thus produced is essential for α1 -AR-mediated activation of the classical hepatic glycogenolytic, gluconeogenic, and ureagenic responses. However, H2 O2 inhibits β-AR-mediated activation of these metabolic responses. We show that H2 O2 mediates its effects on α1 -AR and β-AR by permeating cells through aquaporin 8 (AQP8) channels and promoting Ca2+ mobilization. Thus, our findings reveal a novel NOX2-H2 O2 -AQP8-Ca2+ signaling cascade acting downstream of α1 -AR in hepatocytes, which, by negatively regulating β-AR signaling, establishes negative crosstalk between the two pathways.
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Affiliation(s)
- Magdalena Vilchis-Landeros
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Raquel Guinzberg
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Héctor Riveros-Rosas
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Rafael Villalobos-Molina
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México.,Unidad de Biomedicina, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, México
| | - Enrique Piña
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
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Martinotti S, Patrone M, Balbo V, Mazzucco L, Ranzato E. Endothelial response boosted by platelet lysate: the involvement of calcium toolkit. Int J Mol Sci 2020; 21:ijms21030808. [PMID: 31991927 PMCID: PMC7036775 DOI: 10.3390/ijms21030808] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 01/21/2020] [Accepted: 01/22/2020] [Indexed: 12/26/2022] Open
Abstract
Wound repair is a dynamic process during which crucial signaling pathways are regulated by growth factors and cytokines released by several kinds of cells directly involved in the healing process. However, the limited applications and heterogeneous clinical results of single growth factors in wound healing encouraged the use of a mixture of bioactive molecules such as platelet derivatives for best results in wound repair. An interesting platelet derivative, obtained from blood samples, is platelet lysate (PL), which has shown potential clinical application. PL is obtained from freezing and thawing of platelet-enriched blood samples. Intracellular calcium (Ca2+) signals play a central role in the control of endothelial cell survival, proliferation, motility, and differentiation. We investigated the role of Ca2+ signaling in the PL-driven endothelial healing process. In our experiments, the functional significance of Ca2+ signaling machinery was highlighted performing the scratch wound assay in presence of different inhibitors or specific RNAi. We also pointed out that the PL-induced generation of intracellular ROS (reactive oxygen species) via NOX4 (NADPH oxidase 4) is necessary for the activation of TRPM2 and the resulting Ca2+ entry from the extracellular space. This is the first report of the mechanism of wound repair in an endothelial cell model boosted by the PL-induced regulation of [Ca2+]i.
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Affiliation(s)
- Simona Martinotti
- DiSIT—Dipartimento di Scienze e Innovazione Tecnologica, University of Piemonte Orientale, Viale Teresa Michel 11, 15121 Alessandria, Italy; (M.P.); (E.R.)
- DiSIT—Dipartimento di Scienze e Innovazione Tecnologica, University of Piemonte Orientale, piazza Sant’Eusebio 5, 13100 Vercelli, Italy
- Correspondence: ; Tel.: +39-0131-360260; Fax: +39-0131-360243
| | - Mauro Patrone
- DiSIT—Dipartimento di Scienze e Innovazione Tecnologica, University of Piemonte Orientale, Viale Teresa Michel 11, 15121 Alessandria, Italy; (M.P.); (E.R.)
| | - Valeria Balbo
- Laboratorio Produzione Emocomponenti e Medicina Rigenerativa, SIMT—AO “SS Antonio e Biagio”, 15121 Alessandria, Italy; (V.B.); (L.M.)
| | - Laura Mazzucco
- Laboratorio Produzione Emocomponenti e Medicina Rigenerativa, SIMT—AO “SS Antonio e Biagio”, 15121 Alessandria, Italy; (V.B.); (L.M.)
| | - Elia Ranzato
- DiSIT—Dipartimento di Scienze e Innovazione Tecnologica, University of Piemonte Orientale, Viale Teresa Michel 11, 15121 Alessandria, Italy; (M.P.); (E.R.)
- DiSIT—Dipartimento di Scienze e Innovazione Tecnologica, University of Piemonte Orientale, piazza Sant’Eusebio 5, 13100 Vercelli, Italy
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Kocak Z, Temiz-Resitoglu M, Guden DS, Vezir O, Sucu N, Balcı S, Tamer-Gumus L, Tunctan B, Malik KU, Sahan-Firat S. Modulation of oxidative–nitrosative stress and inflammatory response by rapamycin in target and distant organs in rats exposed to hindlimb ischemia–reperfusion: the role of mammalian target of rapamycin. Can J Physiol Pharmacol 2019; 97:1193-1203. [DOI: 10.1139/cjpp-2019-0394] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Mammalian target of rapamycin (mTOR) has been recognized with potential immunomodulatory properties playing an important role in various physiopathological processes including ischemia–reperfusion (I/R) injury. I/R injury stimulate reactive oxygen and nitrogen species by activating nicotinamide adenine dinucleotide phosphate oxidase and inducible nitric oxide synthase, respectively. Controversial results have been obtained in different I/R models following localized I/R; however, the precise role of the mTOR signaling pathway remains undefined. The objective of the current study was to evaluate the role of the mTOR in oxidative–nitrosative stress and inflammation in hindlimb I/R-induced injury in target and remote organ injuries. In rats subjected to I/R, an increased expression of ribosomal protein S6 (rpS6), inhibitor κB (IκB)-α, nuclear factor-κB (NF-κB) p65, inducible nitric oxide synthase, cyclooxygenase 2, gp91phox, and levels of tumor necrosis factor α, nitrite, nitrotyrosine, malondialdehyde and the activities of myeloperoxidase and catalase in the tissues and (or) sera were detected. Treatment with rapamycin, a selective inhibitor of mTOR, reversed all the I/R-induced changes as manifested by its anti-inflammatory and antioxidant effects in kidney and gastrocnemius muscle of rats. Collectively, these findings suggest that rapamycin protects against I/R-induced oxidative–nitrosative stress and inflammation leading to organ injuries via suppression of mTOR/IκB-α/NF-κB signaling pathway.
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Affiliation(s)
- Zumrut Kocak
- Department of Pharmacology, Faculty of Pharmacy, Mersin University, 33169 Mersin, Turkey
| | - Meryem Temiz-Resitoglu
- Department of Pharmacology, Faculty of Pharmacy, Mersin University, 33169 Mersin, Turkey
| | - Demet Sinem Guden
- Department of Pharmacology, Faculty of Pharmacy, Mersin University, 33169 Mersin, Turkey
| | - Ozden Vezir
- Department of Cardiovascular Surgery, Mersin State Hospital, 33240 Mersin, Turkey
| | - Nehir Sucu
- Department of Cardiovascular Surgery, Faculty of Medicine, Mersin University, 33150 Mersin, Turkey
| | - Senay Balcı
- Department of Biochemistry, Faculty of Medicine, Mersin University, 33150 Mersin, Turkey
| | - Lulufer Tamer-Gumus
- Department of Biochemistry, Faculty of Medicine, Mersin University, 33150 Mersin, Turkey
| | - Bahar Tunctan
- Department of Pharmacology, Faculty of Pharmacy, Mersin University, 33169 Mersin, Turkey
| | - Kafait U. Malik
- Department of Pharmacology, College of Medicine, University of Tennessee, Center for Health Sciences, Memphis, TN 38163, USA
| | - Seyhan Sahan-Firat
- Department of Pharmacology, Faculty of Pharmacy, Mersin University, 33169 Mersin, Turkey
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Vighetto V, Ancona A, Racca L, Limongi T, Troia A, Canavese G, Cauda V. The Synergistic Effect of Nanocrystals Combined With Ultrasound in the Generation of Reactive Oxygen Species for Biomedical Applications. Front Bioeng Biotechnol 2019; 7:374. [PMID: 32039170 PMCID: PMC6988813 DOI: 10.3389/fbioe.2019.00374] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 11/14/2019] [Indexed: 12/21/2022] Open
Abstract
Reactive oxygen species (ROS) effects on living cells and tissues is multifaceted and their level or dose can considerably affect cell proliferation and viability. It is therefore necessary understand their role also designing ways able to regulate their amount inside cells, i.e., using engineered nanomaterials with either antioxidant properties or, for cancer therapy applications, capable to induce oxidative stress and cell death, through tunable ROS production. In this paper, we report on the use of single-crystalline zinc oxide (ZnO) round-shaped nanoparticles, yet ZnO nanocrystals (NCs) functionalized with amino-propyl groups (ZnO-NH2 NCs), combined with pulsed ultrasound (US). We show the synergistic effects produced by NC-assisted US which are able to produce different amount of ROS, as a result of inertial cavitation under the pulsed US exposure. Using Passive Cavitation Detection (PCD) and Electron Paramagnetic Resonance (EPR) spectroscopy, we systematically study which are the key parameters, monitoring, and influencing the amount of generated ROS measuring their concentration in water media and comparing all the results with pure water batches. We thus propose a ROS generation mechanism based on the selective application of US to the ZnO nanocrystals in water solutions. Ultrasound B-mode imaging is also applied, proving in respect to pure water, the enhanced ecographic signal generation of the aqueous solution containing ZnO-NH2 NCs when exposed to pulsed ultrasound. Furthermore, to evaluate the applicability of ZnO-NH2 NCs in the biomedical field, the ROS generation is studied by interposing different tissue mimicking materials, like phantoms and ex vivo tissues, between the US transducer and the sample well. As a whole, we clearly proof the enhanced capability to produce ROS and to control their amount when using ZnO-NH2 NCs in combination with pulsed ultrasound anticipating their applicability in the fields of biology and health care.
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Affiliation(s)
- Veronica Vighetto
- Department of Applied Science and Technology, Politecnico di Torino, Turin, Italy
| | - Andrea Ancona
- Department of Applied Science and Technology, Politecnico di Torino, Turin, Italy
| | - Luisa Racca
- Department of Applied Science and Technology, Politecnico di Torino, Turin, Italy
| | - Tania Limongi
- Department of Applied Science and Technology, Politecnico di Torino, Turin, Italy
| | - Adriano Troia
- Ultrasounds and Chemistry Lab, Advanced Metrology for Quality of Life, Istituto Nazionale di Ricerca Metrologica, Turin, Italy
| | - Giancarlo Canavese
- Department of Applied Science and Technology, Politecnico di Torino, Turin, Italy
| | - Valentina Cauda
- Department of Applied Science and Technology, Politecnico di Torino, Turin, Italy
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Acetaldehyde dehydrogenase 2 deficiency exacerbates cardiac fibrosis by promoting mobilization and homing of bone marrow fibroblast progenitor cells. J Mol Cell Cardiol 2019; 137:107-118. [PMID: 31668970 DOI: 10.1016/j.yjmcc.2019.10.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 10/18/2019] [Accepted: 10/21/2019] [Indexed: 12/22/2022]
Abstract
Cardiac fibrosis is a common feature of various cardiovascular diseases. Previous studies showed that acetaldehyde dehydrogenase 2 (ALDH2) deficiency exacerbated pressure overload-induced heart failure. However, the role and mechanisms of cardiac fibrosis in this process remain largely unknown. This study aimed to investigate the effect of ALDH2 deficiency on cardiac fibrosis in transverse aortic constriction (TAC) induced pressure overload model in mice. Echocardiography and histological analysis revealed cardiac dysfunction and enhanced cardiac fibrosis in TAC-operated animals; ALDH2 deficiency further aggravated these changes. ALDH2 chimeric mice were generated by bone marrow (BM) transplantation of WT mice into the lethally irradiated ALDH2KO mice. The proportion of circulating fibroblast progenitor cells (FPCs) and ROS level in BM after TAC were significantly higher in ALDH2KO mice than in ALDH2 chimeric mice. Furthermore, FPCs were isolated and cultured for in vitro mechanistic studies. The results showed that the stem cell-derived factor 1 (SDF-1)/C-X-C chemokine receptor 4 (CXCR4) axis played a major role in the recruitment of FPCs. In conclusion, our research reveals that increased bone marrow FPCs mobilization and myocardial homing contribute to the enhanced cardiac fibrosis and dysfunction induced by TAC in ALDH2 KO mice via exacerbating accumulation of ROS in BM and myocardial SDF-1 expression.
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The Thioredoxin System is Regulated by the ASK-1/JNK/p38/Survivin Pathway During Germ Cell Apoptosis. Molecules 2019; 24:molecules24183333. [PMID: 31547465 PMCID: PMC6767173 DOI: 10.3390/molecules24183333] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 08/31/2019] [Accepted: 09/11/2019] [Indexed: 11/21/2022] Open
Abstract
The aim is to explore the mechanism of the apoptosis signal-regulating kinase-1 (ASK-1) signaling pathway and the involvement of the thioredoxin (Trx) system during testicular ischemia reperfusion injury (tIRI) by using ASK-1 specific inhibitor, NQDI-1. Male Sprague-Dawley rats (n = 36, 250–300 g) were equally divided into 3 groups: sham, tIRI, and tIRI + NQDI-1 (10 mg/kg, i.p, pre-reperfusion). For tIRI induction, the testicular cord and artery were occluded for 1 h followed by 4 h of reperfusion. Histological analyses, protein immunoexpression, biochemical assays, and real-time PCR were used to evaluate spermatogenesis, ASK-1/Trx axis expression, enzyme activities, and relative mRNA expression, respectively. During tIRI, ipsilateral testes underwent oxidative stress indicated by low levels of superoxide dismutase (SOD) and Glutathione (GSH), increased oxidative damage to lipids and DNA, and spermatogenic damage. This was associated with induced mRNA expression of pro-apoptosis genes, downregulation of antiapoptosis genes, increased caspase 3 activity and activation of the ASK-1/JNK/p38/survivin apoptosis pathway. In parallel, the expression of Trx, Trx reductase were significantly reduced, while the expression of Trx interacting protein (TXNIP) and the NADP+/ nicotinamide Adenine Dinucleotide phosphate (NADPH) ratio were increased. These modulations were attenuated by NQDI-1 treatment. In conclusion, the Trx system is regulated by the ASK-1/Trx/TXNIP axis to maintain cellular redox homeostasis and is linked to tIRI-induced germ cell apoptosis via the ASK-1/JNK/p38/survivin apoptosis pathway.
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Zhang R, Liu J, Yu S, Sun D, Wang X, Fu J, Shen J, Xie Z. Osteoprotegerin (OPG) Promotes Recruitment of Endothelial Progenitor Cells (EPCs) via CXCR4 Signaling Pathway to Improve Bone Defect Repair. Med Sci Monit 2019; 25:5572-5579. [PMID: 31350844 PMCID: PMC6681686 DOI: 10.12659/msm.916838] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background The aim of this study was to investigate the effect of using osteoprotegerin (OPG) to treat bone defects mediated by endothelial progenitor cell (EPC) recruitment and migration through the CXCR4 signaling pathway. Material/Methods The EPCs extracted from human peripheral blood were cultured in vitro and the expression of CXCR4 and its downstream p-AKT was monitored by the Western blot analysis after OPG treatment. Using the scratch wound healing test and Transwell assay, we assessed the variables influencing the effect of OPG on EPCs after pre-treatment with CXCR4 blocker (AMD3100) and PI3K blocker (Ly294002). After 4 weeks, the bone defect repair condition was estimated via micro-CT and staining with HE and Masson trichrome. Then, immunofluorescence staining was performed to assess angiogenesis in bone defects, while the expression of EPC marker and vascular endothelial growth factor receptor 2 (VEGFR2) was detected by immunohistochemical staining. Results The EPCs treated with OPG had increased levels of CXCR4 and p-AKT. Moreover, the difference in EPC levels among groups in the scratch wound healing experiment and migration experiment indicated that the OPG treatment promoted cell migration and AMD3100 and LY294002 inhibited the function of OPG. In addition, OPG promoted angiogenesis and repair of bone defect in rats, and these effects were abolished by AMD3100 and LY294002 administration. Conclusions OPG enhanced the proliferation and migration of EPCs through the CXCR4 pathway and promoted angiogenesis and bone formation at bone defect sites.
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Affiliation(s)
- Rongfeng Zhang
- National and Regional United Engineering Laboratory of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China (mainland)
| | - Jianwei Liu
- Department of Orthopedics, The First People's Hospital of Chenzhou, Chenzhou, Hunan, China (mainland)
| | - Shengpeng Yu
- National and Regional United Engineering Laboratory of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China (mainland)
| | - Dong Sun
- National and Regional United Engineering Laboratory of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China (mainland)
| | - Xiaohua Wang
- National and Regional United Engineering Laboratory of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China (mainland)
| | - Jingshu Fu
- National and Regional United Engineering Laboratory of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China (mainland)
| | - Jie Shen
- National and Regional United Engineering Laboratory of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China (mainland)
| | - Zhao Xie
- National and Regional United Engineering Laboratory of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China (mainland)
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Srankova J, Veteskova J, Marusakova M, Pivackova L, Doka G, Krenek P, Klimas J. Pegfilgrastim and linagliptin potentiate chemoattraction of Ccr2 and Cd44 stem cells accompanied by alterations of cardiac Hgf, Igf-1 and Mcp-1 in daunorubicin cardiomyopathy. J Pharm Pharmacol 2019; 71:1440-1450. [DOI: 10.1111/jphp.13133] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 05/30/2019] [Accepted: 06/15/2019] [Indexed: 01/22/2023]
Abstract
Abstract
Objective
Daunorubicin (DAU) downregulates cytokines promoting stem cell migration and homing into the heart, reducing cardiac regeneration after anticancer chemotherapy. Pegfilgrastim (PFIL) protects from DAU-induced neutropenia but its cardioprotective potential remains unclear. We tested whether pegfilgrastim and a dipeptidyl peptidase-4 inhibitor linagliptin, potential enhancers of stem cells migration and homing, would improve DAU-cardiomyopathy.
Methods
DAU (7.5 mg/kg, i.v.) was administered to male Wistar rats to induce cardiotoxicity. Pegfilgrastim (100 µg/kg, s.c.) was administered 24h after DAU, and linagliptin was administered orally for 8 weeks (5 mg/kg/day, LINA). Cardiac damage markers (Nppa, Myh6, Myh7, Gp91phox), cytokines (Sdf-1alpha, Mcp-1, Vegf, Hgf, Igf-1), stem cell markers (Cxcr4, Ccr2, Cd34, Cd133, Cd44, Cd105) were determined by qRT-PCR.
Key findings
Decreased Myh6, elevated Myh7 Nppa, and Gp91phox were not ameliorated by PFIL + LINA. Downregulated expressions of cytokines (Vegf, Sdf-1alpha) and stem cells markers (Cxcr4, Cd34, Cd133, and Cd105) remained decreased after PFIL + LINA. DAU-induced upregulation of Mcp-1, Ccr2 and Cd44 was further potentiated by PFIL + LINA. PFIL + LINA normalised expression of Hgf and Igf-1.
Conclusions
Although PFIL + LINA failed in universal potentiation of stem cells migration and homing, the expression of stem cell markers Ccr2 and Cd44 in the heart potentially increased through the preservation of Hgf, Igf-1 and upregulation of Mcp-1.
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Affiliation(s)
- Jasna Srankova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University in Bratislava, Bratislava, Slovak Republic
| | - Jana Veteskova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University in Bratislava, Bratislava, Slovak Republic
| | - Margareta Marusakova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University in Bratislava, Bratislava, Slovak Republic
| | - Lenka Pivackova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University in Bratislava, Bratislava, Slovak Republic
| | - Gabriel Doka
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University in Bratislava, Bratislava, Slovak Republic
| | - Peter Krenek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University in Bratislava, Bratislava, Slovak Republic
| | - Jan Klimas
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University in Bratislava, Bratislava, Slovak Republic
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Koutakis P, Ismaeel A, Farmer P, Purcell S, Smith RS, Eidson JL, Bohannon WT. Oxidative stress and antioxidant treatment in patients with peripheral artery disease. Physiol Rep 2019; 6:e13650. [PMID: 29611350 PMCID: PMC5880878 DOI: 10.14814/phy2.13650] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 02/12/2018] [Accepted: 02/22/2018] [Indexed: 12/27/2022] Open
Abstract
Peripheral artery disease is an atherosclerotic disease of arterial vessels that mostly affects arteries of lower extremities. Effort induced cycles of ischemia and reperfusion lead to increased reactive oxygen species production by mitochondria. Therefore, the pathophysiology of peripheral artery disease is a consequence of metabolic myopathy, and oxidative stress is the putative major operating mechanism behind the structural and metabolic changes that occur in muscle. In this review, we discuss the evidence for oxidative damage in peripheral artery disease and discuss management strategies related to antioxidant supplementation. We also highlight the major pathways governing oxidative stress in the disease and discuss their implications in disease progression. Potential therapeutic targets and diagnostic methods related to these mechanisms are explored, with an emphasis on the Nrf2 pathway.
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Affiliation(s)
- Panagiotis Koutakis
- Department of Health Human Performance and Recreation, Baylor University, Waco, Texas
| | - Ahmed Ismaeel
- Department of Health Human Performance and Recreation, Baylor University, Waco, Texas
| | - Patrick Farmer
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas
| | - Seth Purcell
- Department of Surgery, Baylor Scott and White Medical Center, Temple, Texas
| | - Robert S Smith
- Department of Surgery, Baylor Scott and White Medical Center, Temple, Texas
| | - Jack L Eidson
- Department of Surgery, Baylor Scott and White Medical Center, Temple, Texas
| | - William T Bohannon
- Department of Surgery, Baylor Scott and White Medical Center, Temple, Texas
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24
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Liu L, Cui Y, Li X, Que X, Xiao Y, Yang C, Zhang J, Xie X, Cowan PJ, Tian J, Hao H, Liu Z. Concomitant overexpression of triple antioxidant enzymes selectively increases circulating endothelial progenitor cells in mice with limb ischaemia. J Cell Mol Med 2019; 23:4019-4029. [PMID: 30973215 PMCID: PMC6533526 DOI: 10.1111/jcmm.14287] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 03/01/2019] [Accepted: 03/02/2019] [Indexed: 12/15/2022] Open
Abstract
Endothelial progenitor cells (EPCs) are a group of heterogeneous cells in bone marrow (BM) and blood. Ischaemia increases reactive oxygen species (ROS) production that regulates EPC number and function. The present study was conducted to determine if ischaemia‐induced ROS differentially regulated individual EPC subpopulations using a mouse model concomitantly overexpressing superoxide dismutase (SOD)1, SOD3 and glutathione peroxidase. Limb ischaemia was induced by femoral artery ligation in male transgenic mice with their wild‐type littermate as control. BM and blood cells were collected for EPCs analysis and mononuclear cell intracellular ROS production, apoptosis and proliferation at baseline, day 3 and day 21 after ischaemia. Cells positive for c‐Kit+/CD31+ or Sca‐1+/Flk‐1+ or CD34+/CD133+ or CD34+/Flk‐1+ were identified as EPCs. ischaemia significantly increased ROS production and cell apoptosis and decreased proliferation of circulating and BM mononuclear cells and increased BM and circulating EPCs levels. Overexpression of triple antioxidant enzymes effectively prevented ischaemia‐induced ROS production with significantly decreased cell apoptosis and preserved proliferation and significantly increased circulating EPCs level without significant changes in BM EPC populations, associated with enhanced recovery of blood flow and function of the ischemic limb. These data suggested that ischaemia‐induced ROS was differentially involved in the regulation of circulating EPC population.
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Affiliation(s)
- Lingjuan Liu
- Department of Cardiology, Children's hospital of Chongqing Medical University, Chongqing, China.,Center for Precision Medicine and Division of Cardiovascular Medicine, University of Missouri School of Medicine, Columbia, Missouri
| | - Yuqi Cui
- Center for Precision Medicine and Division of Cardiovascular Medicine, University of Missouri School of Medicine, Columbia, Missouri
| | - Xin Li
- Center for Precision Medicine and Division of Cardiovascular Medicine, University of Missouri School of Medicine, Columbia, Missouri
| | - Xingyi Que
- Center for Precision Medicine and Division of Cardiovascular Medicine, University of Missouri School of Medicine, Columbia, Missouri.,Department of Surgery, University of Missouri School of Medicine, Columbia, Missouri
| | - Yuan Xiao
- Center for Precision Medicine and Division of Cardiovascular Medicine, University of Missouri School of Medicine, Columbia, Missouri
| | - Chunlin Yang
- Center for Precision Medicine and Division of Cardiovascular Medicine, University of Missouri School of Medicine, Columbia, Missouri
| | - Jia Zhang
- Center for Precision Medicine and Division of Cardiovascular Medicine, University of Missouri School of Medicine, Columbia, Missouri
| | - Xiaoyun Xie
- Center for Precision Medicine and Division of Cardiovascular Medicine, University of Missouri School of Medicine, Columbia, Missouri
| | - Peter J Cowan
- Department of Medicine, University of Melbourne, Melbourne, Australia.,Immunology Research Centre, St. Vincent's Hospital, Melbourne, Australia
| | - Jie Tian
- Department of Cardiology, Children's hospital of Chongqing Medical University, Chongqing, China
| | - Hong Hao
- Center for Precision Medicine and Division of Cardiovascular Medicine, University of Missouri School of Medicine, Columbia, Missouri
| | - Zhenguo Liu
- Center for Precision Medicine and Division of Cardiovascular Medicine, University of Missouri School of Medicine, Columbia, Missouri
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25
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Kashyap D, Tuli HS, Sak K, Garg VK, Goel N, Punia S, Chaudhary A. Role of Reactive Oxygen Species in Cancer Progression. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/s40495-019-00171-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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26
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Modification of Cardiac Progenitor Cell-Derived Exosomes by miR-322 Provides Protection against Myocardial Infarction through Nox2-Dependent Angiogenesis. Antioxidants (Basel) 2019; 8:antiox8010018. [PMID: 30634641 PMCID: PMC6356993 DOI: 10.3390/antiox8010018] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 01/05/2019] [Indexed: 02/06/2023] Open
Abstract
Myocardial infarction (MI) is the primary cause of cardiovascular mortality, and therapeutic strategies to prevent or mitigate the consequences of MI are a high priority. Cardiac progenitor cells (CPCs) have been used to treat cardiac injury post-MI, and despite poor engraftment, they have been shown to inhibit apoptosis and to promote angiogenesis through poorly understood paracrine effects. We previously reported that the direct injection of exosomes derived from CPCs (CPCexo) into mouse hearts provides protection against apoptosis in a model of acute ischemia/reperfusion injury. Moreover, we and others have reported that reactive oxygen species (ROS) derived from NADPH oxidase (NOX) can enhance angiogenesis in endothelial cells (ECs). Here we examined whether bioengineered CPCexo transfected with a pro-angiogenic miR-322 (CPCexo-322) can improve therapeutic efficacy in a mouse model of MI as compared to CPCexo. Systemic administration of CPCexo-322 in mice after ischemic injury provided greater protection post-MI than control CPCexo, in part, through enhanced angiogenesis in the border zones of infarcted hearts. Mechanistically, the treatment of cultured human ECs with CPCexo-322 resulted in a greater angiogenic response, as determined by increased EC migration and capillary tube formation via increased Nox2-derived ROS. Our study reveals that the engineering of CPCexo via microRNA (miR) programing can enhance angiogenesis, and this may be an effective therapeutic strategy for the treatment of ischemic cardiovascular diseases.
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27
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Abstract
SIGNIFICANCE G protein-coupled receptors (GPCR) are the largest group of cell surface receptors, which link cells to their environment. Reactive oxygen species (ROS) can act as important cellular signaling molecules. The family of NADPH oxidases generates ROS in response to activated cell surface receptors. Recent Advances: Various signaling pathways linking GPCRs and activation of NADPH oxidases have been characterized. CRITICAL ISSUES Still, a more detailed analysis of G proteins involved in the GPCR-mediated activation of NADPH oxidases is needed. In addition, a more precise discrimination of NADPH oxidase activation due to either upregulation of subunit expression or post-translational subunit modifications is needed. Also, the role of noncanonical modulators of NADPH oxidase activation in the response to GPCRs awaits further analyses. FUTURE DIRECTIONS As GPCRs are one of the most popular classes of investigational drug targets, further detailing of G protein-coupled mechanisms in the activation mechanism of NADPH oxidases as well as better understanding of the link between newly identified NADPH oxidase interaction partners and GPCR signaling will provide new opportunities for improved efficiency and decreased off target effects of therapies targeting GPCRs.
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Affiliation(s)
- Andreas Petry
- 1 Experimental and Molecular Pediatric Cardiology, German Heart Center Munich , TU Munich, Munich, Germany
| | - Agnes Görlach
- 1 Experimental and Molecular Pediatric Cardiology, German Heart Center Munich , TU Munich, Munich, Germany .,2 DZHK (German Centre for Cardiovascular Research) , Partner Site Munich, Munich Heart Alliance, Munich, Germany
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28
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Yang J. The role of reactive oxygen species in angiogenesis and preventing tissue injury after brain ischemia. Microvasc Res 2018; 123:62-67. [PMID: 30594490 DOI: 10.1016/j.mvr.2018.12.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 12/24/2018] [Accepted: 12/26/2018] [Indexed: 02/06/2023]
Abstract
Oxidative stress, which is defined as an imbalance between proxidant and antioxidant systems, is the essential mechanism involving in the ischemic process. During the early stage of brain ischemia, reactive oxygen species (ROS) are increased. Increased ROS are thought of a consequence of brain ischemia and exacerbating disease due to inducing cell death, apoptosis and senescence by oxidative stress. During brain tissue repair, ROS are act as signaling molecules and may be benefical for regulating angiogenesis and preventing tissue injury. New blood vessel formation is essentially required for rescuing tissue from brain ischemia. In ischemic conditions, ROS promotes angiogenesis, either directly or via the generation of active oxidation products. ROS-induced angiogenesis involves several signaling pathways. This paper reviewed current understanding of the role of ROS as a mediator and modulator of angiogenesis in brain ischemia.
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Affiliation(s)
- Jiping Yang
- Department of Medical Imaging, The Second Hospital of Hebei Medical University, 215 West Heping Road, Shijiazhuang 050000, Hebei Province, China.
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29
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Nugud A, Sandeep D, El-Serafi AT. Two faces of the coin: Minireview for dissecting the role of reactive oxygen species in stem cell potency and lineage commitment. J Adv Res 2018; 14:73-79. [PMID: 30023134 PMCID: PMC6047483 DOI: 10.1016/j.jare.2018.05.012] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 05/30/2018] [Accepted: 05/31/2018] [Indexed: 12/29/2022] Open
Abstract
Reactive oxygen species (ROS) are produced as by-products of several intracellular metabolic pathways and are reduced to more stable molecules by several protective pathways. The presence of high levels of ROS can be associated with disturbance of cell function and could lead to apoptosis. The presence of ROS within the physiological range has many effects on several signalling pathways. In stem cells, this role can range between keeping the potency of the naive stem cells to differentiation towards a certain lineage. In addition, the level of certain ROS would change according to the differentiation stage. For example, the presence of ROS can be associated with increasing the proliferation of mesenchymal stem cells, decreasing the potency of embryonic stem cells and adding to the genomic stability of induced pluripotent stem cells. ROS can enhance the differentiation of stem cells into cardiomyocytes, adipocytes, endothelial cells, keratinocytes and neurons. In the meantime, ROS inhibits osteogenesis and enhances the differentiation of cartilage to the hypertrophic stage, which is associated with chondrocyte death. Thus, ROS may form a link between naïve stem cells in the body and the environment. In addition, monitoring of ROS levels in vitro may help in tissue regeneration studies.
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Affiliation(s)
- Ahmed Nugud
- Sharjah Institute for Medical and Health Research, University of Sharjah, United Arab Emirates
| | - Divyasree Sandeep
- Sharjah Institute for Medical and Health Research, University of Sharjah, United Arab Emirates
| | - Ahmed T. El-Serafi
- Sharjah Institute for Medical and Health Research, University of Sharjah, United Arab Emirates
- Faculty of Medicine, Suez Canal University, Egypt
- Department of Clinical and Experimental Medicine, Linköping University, Sweden
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30
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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. THE JOURNAL OF IMMUNOLOGY 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] [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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31
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Fashioning blood vessels by ROS signalling and metabolism. Semin Cell Dev Biol 2018; 80:35-42. [DOI: 10.1016/j.semcdb.2017.08.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 07/24/2017] [Accepted: 08/01/2017] [Indexed: 12/16/2022]
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32
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O’Grady KP, Kavanaugh TE, Cho H, Ye H, Gupta MK, Madonna MC, Lee J, O’Brien CM, Skala MC, Hasty KA, Duvall CL. Drug-Free ROS Sponge Polymeric Microspheres Reduce Tissue Damage from Ischemic and Mechanical Injury. ACS Biomater Sci Eng 2018; 4:1251-1264. [PMID: 30349873 PMCID: PMC6195321 DOI: 10.1021/acsbiomaterials.6b00804] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The inherent antioxidant function of poly(propylene sulfide) (PPS) microspheres (MS) was dissected for different reactive oxygen species (ROS), and therapeutic benefits of PPS-MS were explored in models of diabetic peripheral arterial disease (PAD) and mechanically induced post-traumatic osteoarthritis (PTOA). PPS-MS (∼1 μm diameter) significantly scavenged hydrogen peroxide (H2O2), hypochlorite, and peroxynitrite but not superoxide in vitro in cell-free and cell-based assays. Elevated ROS levels (specifically H2O2) were confirmed in both a mouse model of diabetic PAD and in a mouse model of PTOA, with greater than 5- and 2-fold increases in H2O2, respectively. PPS-MS treatment functionally improved recovery from hind limb ischemia based on ∼15-25% increases in hemoglobin saturation and perfusion in the footpads as well as earlier remodeling of vessels in the proximal limb. In the PTOA model, PPS-MS reduced matrix metalloproteinase (MMP) activity by 30% and mitigated the resultant articular cartilage damage. These results suggest that local delivery of PPS-MS at sites of injury-induced inflammation improves the vascular response to ischemic injury in the setting of chronic hyperglycemia and reduces articular cartilage destruction following joint trauma. These results motivate further exploration of PPS as a stand-alone, locally sustained antioxidant therapy and as a material for microsphere-based, sustained local drug delivery to inflamed tissues at risk of ROS damage.
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Affiliation(s)
- Kristin P. O’Grady
- Biomedical Engineering, Vanderbilt University, 1225 Stevenson Center Lane, 5824 Stevenson Center, Nashville, Tennessee 37235, United States
| | - Taylor E. Kavanaugh
- Biomedical Engineering, Vanderbilt University, 1225 Stevenson Center Lane, 5824 Stevenson Center, Nashville, Tennessee 37235, United States
| | - Hongsik Cho
- Orthopaedic Surgery and Biomedical Engineering, University of Tennessee Health Science Center, Research Service 151, VA Medical Center, 1030 Jefferson Avenue, Memphis, Tennessee 38104, United States
| | - Hanrong Ye
- Biomedical Engineering, Vanderbilt University, 1225 Stevenson Center Lane, 5824 Stevenson Center, Nashville, Tennessee 37235, United States
| | - Mukesh K. Gupta
- Biomedical Engineering, Vanderbilt University, 1225 Stevenson Center Lane, 5824 Stevenson Center, Nashville, Tennessee 37235, United States
| | - Megan C. Madonna
- Biomedical Engineering, Vanderbilt University, 1225 Stevenson Center Lane, 5824 Stevenson Center, Nashville, Tennessee 37235, United States
| | - Jinjoo Lee
- Biomedical Engineering, Vanderbilt University, 1225 Stevenson Center Lane, 5824 Stevenson Center, Nashville, Tennessee 37235, United States
| | - Christine M. O’Brien
- Biomedical Engineering, Vanderbilt University, 1225 Stevenson Center Lane, 5824 Stevenson Center, Nashville, Tennessee 37235, United States
| | - Melissa C. Skala
- Biomedical Engineering, Vanderbilt University, 1225 Stevenson Center Lane, 5824 Stevenson Center, Nashville, Tennessee 37235, United States
| | - Karen A. Hasty
- Orthopaedic Surgery and Biomedical Engineering, University of Tennessee Health Science Center, Research Service 151, VA Medical Center, 1030 Jefferson Avenue, Memphis, Tennessee 38104, United States
| | - Craig L. Duvall
- Biomedical Engineering, Vanderbilt University, 1225 Stevenson Center Lane, 5824 Stevenson Center, Nashville, Tennessee 37235, United States
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33
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Li TB, Zhang YZ, Liu WQ, Zhang JJ, Peng J, Luo XJ, Ma QL. Correlation between NADPH oxidase-mediated oxidative stress and dysfunction of endothelial progenitor cell in hyperlipidemic patients. Korean J Intern Med 2018; 33:313-322. [PMID: 28899085 PMCID: PMC5840593 DOI: 10.3904/kjim.2016.140] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Revised: 07/19/2016] [Accepted: 10/13/2016] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND/AIMS NADPH (nicotinamide adenine dinucleotide phosphate) oxidase (NOX)-mediated oxidative stress plays a key role in promotion of oxidative injury in the cardiovascular system. The aim of this study is to evaluate the status of NOX in endothelial progenitor cells (EPCs) of hyperlipidemic patients and to assess the correlation between NOX activity and the functions EPCs. METHODS A total of 30 hyperlipidemic patients were enrolled for this study and 30 age-matched volunteers with normal level of plasma lipids served as controls. After the circulating EPCs were isolated, the EPC functions (migration, adhesion and tube formation) were evaluated and the status of NOX (expression and activity) was examined. RESULTS Compared to the controls, hyperlipidemic patients showed an increase in plasma lipids and a reduction in EPC functions including the attenuated abilities in adhesion, migration and tube formation, concomitant with an increase in NOX expression (NOX2 and NOX4), NOX activity, and reactive oxygen species production. The data analysis showed negative correlations between NOX activity and EPC functions. CONCLUSIONS There is a positive correlation between the NOX-mediated oxidative stress and the dysfunctions of circulating EPCs in hyperlipidemic patients, and suppression of NOX might offer a novel strategy to improve EPCs functions in hyperlipidemia.
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Affiliation(s)
- Ting-Bo Li
- Department of Laboratory Medicine, Xiangya School of Medicine, Changsha, China
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha, China
| | - Yin-Zhuang Zhang
- Department of Cardiovascular Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Wei-Qi Liu
- Department of Cardiovascular Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Jie-Jie Zhang
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha, China
| | - Jun Peng
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha, China
- Hunan Provincial Key Laboratory of Cardiovascular Research, School of Pharmaceutical Sciences, Central South University, Changsha, China
| | - Xiu-Ju Luo
- Department of Laboratory Medicine, Xiangya School of Medicine, Changsha, China
- Correspondence to Xiu-Ju Luo, Ph.D. Department of Laboratory Medicine, Xiangya School of Medicine, Central South University, 172 Tong Zi Po Rd, Changsha 410013, China Tel: +86-731-82650348 Fax: +86-731-82650348 E-mail:
| | - Qi-Lin Ma
- Department of Cardiovascular Medicine, Xiangya Hospital, Central South University, Changsha, China
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34
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Pro-inflammatory hepatic macrophages generate ROS through NADPH oxidase 2 via endocytosis of monomeric TLR4-MD2 complex. Nat Commun 2017; 8:2247. [PMID: 29269727 PMCID: PMC5740170 DOI: 10.1038/s41467-017-02325-2] [Citation(s) in RCA: 157] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 11/21/2017] [Indexed: 12/12/2022] Open
Abstract
Reactive oxygen species (ROS) contribute to the development of non-alcoholic fatty liver disease. ROS generation by infiltrating macrophages involves multiple mechanisms, including Toll-like receptor 4 (TLR4)-mediated NADPH oxidase (NOX) activation. Here, we show that palmitate-stimulated CD11b+F4/80low hepatic infiltrating macrophages, but not CD11b+F4/80high Kupffer cells, generate ROS via dynamin-mediated endocytosis of TLR4 and NOX2, independently from MyD88 and TRIF. We demonstrate that differently from LPS-mediated dimerization of the TLR4–MD2 complex, palmitate binds a monomeric TLR4–MD2 complex that triggers endocytosis, ROS generation and increases pro-interleukin-1β expression in macrophages. Palmitate-induced ROS generation in human CD68lowCD14high macrophages is strongly suppressed by inhibition of dynamin. Furthermore, Nox2-deficient mice are protected against high-fat diet-induced hepatic steatosis and insulin resistance. Therefore, endocytosis of TLR4 and NOX2 into macrophages might be a novel therapeutic target for non-alcoholic fatty liver disease. Reactive species of oxygen promote the development of hepatic steatosis. Here, Kim et al. demonstrate that palmitate stimulates macrophage infiltration and increases oxidative stress during steatosis by binding to the TLR4–MD2 complex, which results in the activation of NOX2.
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35
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Parikh PP, Castilla D, Lassance-Soares RM, Shao H, Regueiro M, Li Y, Vazquez-Padron R, Webster KA, Liu ZJ, Velazquez OC. A Reliable Mouse Model of Hind limb Gangrene. Ann Vasc Surg 2017; 48:222-232. [PMID: 29197603 DOI: 10.1016/j.avsg.2017.10.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 10/19/2017] [Accepted: 10/24/2017] [Indexed: 10/18/2022]
Abstract
BACKGROUND Lack of a reliable hind limb gangrene animal model limits preclinical studies of gangrene, a severe form of critical limb ischemia. We develop a novel mouse hind limb gangrene model to facilitate translational studies. METHODS BALB/c, FVB, and C57BL/6 mice underwent femoral artery ligation (FAL) with or without administration of NG-nitro-L-arginine methyl ester (L-NAME), an endothelial nitric oxide synthase inhibitor. Gangrene was assessed using standardized ischemia scores ranging from 0 (no gangrene) to 12 (forefoot gangrene). Laser Doppler imaging (LDI) and DiI perfusion quantified hind limb reperfusion postoperatively. RESULTS BALB/c develops gangrene with FAL-only (n = 11/11, 100% gangrene incidence), showing mean limb ischemia score of 12 on postoperative days (PODs) 7 and 14 with LDI ranging from 0.08 to 0.12 on respective PODs. Most FVB did not develop gangrene with FAL-only (n = 3/9, 33% gangrene incidence) but with FAL and L-NAME (n = 9/9, 100% gangrene incidence). Mean limb ischemia scores for FVB undergoing FAL with L-NAME were significantly higher than for FVB receiving FAL-only. LDI score and capillary density by POD 28 were significantly lower in FVB undergoing FAL with L-NAME. C57BL/6 did not develop gangrene with FAL-only or FAL and L-NAME. CONCLUSIONS Reproducible murine gangrene models may elucidate molecular mechanisms for gangrene development, facilitating therapeutic intervention.
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Affiliation(s)
- Punam P Parikh
- DeWitt-Daughtry Family Department of Surgery, Division of Vascular Surgery, University of Miami Miller School of Medicine, Miami, FL.
| | - Diego Castilla
- DeWitt-Daughtry Family Department of Surgery, Division of Vascular Surgery, University of Miami Miller School of Medicine, Miami, FL
| | - Roberta M Lassance-Soares
- DeWitt-Daughtry Family Department of Surgery, Division of Vascular Surgery, University of Miami Miller School of Medicine, Miami, FL
| | - Hongwei Shao
- DeWitt-Daughtry Family Department of Surgery, Division of Vascular Surgery, University of Miami Miller School of Medicine, Miami, FL
| | - Manuela Regueiro
- DeWitt-Daughtry Family Department of Surgery, Division of Vascular Surgery, University of Miami Miller School of Medicine, Miami, FL
| | - Yan Li
- DeWitt-Daughtry Family Department of Surgery, Division of Vascular Surgery, University of Miami Miller School of Medicine, Miami, FL
| | - Roberto Vazquez-Padron
- DeWitt-Daughtry Family Department of Surgery, Division of Vascular Surgery, University of Miami Miller School of Medicine, Miami, FL
| | - Keith A Webster
- Department of Molecular and Cellular Pharmacology and the Vascular Biology Institute, University of Miami Miller School of Medicine, Miami, FL
| | - Zhao-Jun Liu
- DeWitt-Daughtry Family Department of Surgery, Division of Vascular Surgery, University of Miami Miller School of Medicine, Miami, FL
| | - Omaida C Velazquez
- DeWitt-Daughtry Family Department of Surgery, Division of Vascular Surgery, University of Miami Miller School of Medicine, Miami, FL
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Nox, Reactive Oxygen Species and Regulation of Vascular Cell Fate. Antioxidants (Basel) 2017; 6:antiox6040090. [PMID: 29135921 PMCID: PMC5745500 DOI: 10.3390/antiox6040090] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 10/21/2017] [Accepted: 11/07/2017] [Indexed: 01/09/2023] Open
Abstract
The generation of reactive oxygen species (ROS) and an imbalance of antioxidant defence mechanisms can result in oxidative stress. Several pro-atherogenic stimuli that promote intimal-medial thickening (IMT) and early arteriosclerotic disease progression share oxidative stress as a common regulatory pathway dictating vascular cell fate. The major source of ROS generated within the vascular system is the nicotinamide adenine dinucleotide phosphate (NADPH) oxidase family of enzymes (Nox), of which seven members have been characterized. The Nox family are critical determinants of the redox state within the vessel wall that dictate, in part the pathophysiology of several vascular phenotypes. This review highlights the putative role of ROS in controlling vascular fate by promoting endothelial dysfunction, altering vascular smooth muscle phenotype and dictating resident vascular stem cell fate, all of which contribute to intimal medial thickening and vascular disease progression.
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Roberts DD, Kaur S, Isenberg JS. Regulation of Cellular Redox Signaling by Matricellular Proteins in Vascular Biology, Immunology, and Cancer. Antioxid Redox Signal 2017; 27:874-911. [PMID: 28712304 PMCID: PMC5653149 DOI: 10.1089/ars.2017.7140] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 07/11/2017] [Accepted: 07/13/2017] [Indexed: 12/15/2022]
Abstract
SIGNIFICANCE In contrast to structural elements of the extracellular matrix, matricellular proteins appear transiently during development and injury responses, but their sustained expression can contribute to chronic disease. Through interactions with other matrix components and specific cell surface receptors, matricellular proteins regulate multiple signaling pathways, including those mediated by reactive oxygen and nitrogen species and H2S. Dysregulation of matricellular proteins contributes to the pathogenesis of vascular diseases and cancer. Defining the molecular mechanisms and receptors involved is revealing new therapeutic opportunities. Recent Advances: Thrombospondin-1 (TSP1) regulates NO, H2S, and superoxide production and signaling in several cell types. The TSP1 receptor CD47 plays a central role in inhibition of NO signaling, but other TSP1 receptors also modulate redox signaling. The matricellular protein CCN1 engages some of the same receptors to regulate redox signaling, and ADAMTS1 regulates NO signaling in Marfan syndrome. In addition to mediating matricellular protein signaling, redox signaling is emerging as an important pathway that controls the expression of several matricellular proteins. CRITICAL ISSUES Redox signaling remains unexplored for many matricellular proteins. Their interactions with multiple cellular receptors remains an obstacle to defining signaling mechanisms, but improved transgenic models could overcome this barrier. FUTURE DIRECTIONS Therapeutics targeting the TSP1 receptor CD47 may have beneficial effects for treating cardiovascular disease and cancer and have recently entered clinical trials. Biomarkers are needed to assess their effects on redox signaling in patients and to evaluate how these contribute to their therapeutic efficacy and potential side effects. Antioxid. Redox Signal. 27, 874-911.
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Affiliation(s)
- David D. Roberts
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Sukhbir Kaur
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Jeffrey S. Isenberg
- Division of Pulmonary, Allergy and Critical Care, Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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Tsang KM, Hyun JS, Cheng KT, Vargas M, Mehta D, Ushio-Fukai M, Zou L, Pajcini KV, Rehman J, Malik AB. Embryonic Stem Cell Differentiation to Functional Arterial Endothelial Cells through Sequential Activation of ETV2 and NOTCH1 Signaling by HIF1α. Stem Cell Reports 2017; 9:796-806. [PMID: 28781077 PMCID: PMC5599266 DOI: 10.1016/j.stemcr.2017.07.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 06/30/2017] [Accepted: 07/03/2017] [Indexed: 12/15/2022] Open
Abstract
The generation of functional arterial endothelial cells (aECs) from embryonic stem cells (ESCs) holds great promise for vascular tissue engineering. However, the mechanisms underlying their generation and the potential of aECs in revascularizing ischemic tissue are not fully understood. Here, we observed that hypoxia exposure of mouse ESCs induced an initial phase of HIF1α-mediated upregulation of the transcription factor Etv2, which in turn induced the commitment to the EC fate. However, sustained activation of HIF1α in these EC progenitors thereafter induced NOTCH1 signaling that promoted the transition to aEC fate. We observed that transplantation of aECs mediated arteriogenesis in the mouse hindlimb ischemia model. Furthermore, transplantation of aECs in mice showed engraftment in ischemic myocardium and restored cardiac function in contrast to ECs derived under normoxia. Thus, HIF1α activation of Etv2 in ESCs followed by NOTCH1 signaling is required for the generation aECs that are capable of arteriogenesis and revascularization of ischemic tissue. Hypoxia enhances ESC to EC differentiation via HIF1α-ETV2 signaling HIF1α directs arterial endothelial specification by upregulating Notch signaling Transplantation of hypoxia-derived aECs induces arteriogenesis in hindlimb ischemia Hypoxia-derived aECs restore cardiac function following myocardial infarction
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Affiliation(s)
- Kit Man Tsang
- Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, 835 S. Wolcott, Chicago, IL 60612, USA
| | - James S Hyun
- Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, 835 S. Wolcott, Chicago, IL 60612, USA
| | - Kwong Tai Cheng
- Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, 835 S. Wolcott, Chicago, IL 60612, USA
| | - Micaela Vargas
- Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, 835 S. Wolcott, Chicago, IL 60612, USA
| | - Dolly Mehta
- Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, 835 S. Wolcott, Chicago, IL 60612, USA
| | - Masuko Ushio-Fukai
- Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, 835 S. Wolcott, Chicago, IL 60612, USA
| | - Li Zou
- Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, 835 S. Wolcott, Chicago, IL 60612, USA
| | - Kostandin V Pajcini
- Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, 835 S. Wolcott, Chicago, IL 60612, USA
| | - Jalees Rehman
- Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, 835 S. Wolcott, Chicago, IL 60612, USA.
| | - Asrar B Malik
- Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, 835 S. Wolcott, Chicago, IL 60612, USA.
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Steven S, Daiber A, Dopheide JF, Münzel T, Espinola-Klein C. Peripheral artery disease, redox signaling, oxidative stress - Basic and clinical aspects. Redox Biol 2017; 12:787-797. [PMID: 28437655 PMCID: PMC5403804 DOI: 10.1016/j.redox.2017.04.017] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 03/28/2017] [Accepted: 04/10/2017] [Indexed: 12/15/2022] Open
Abstract
Reactive oxygen and nitrogen species (ROS and RNS, e.g. H2O2, nitric oxide) confer redox regulation of essential cellular signaling pathways such as cell differentiation, proliferation, migration and apoptosis. At higher concentrations, ROS and RNS lead to oxidative stress and oxidative damage of biomolecules (e.g. via formation of peroxynitrite, fenton chemistry). Peripheral artery disease (PAD) is characterized by severe ischemic conditions in the periphery leading to intermittent claudication and critical limb ischemia (end stage). It is well known that redox biology and oxidative stress play an important role in this setting. We here discuss the major pathways of oxidative stress and redox signaling underlying the disease progression with special emphasis on the contribution of inflammatory processes. We also highlight therapeutic strategies comprising pharmacological (e.g. statins, angiotensin-converting enzyme inhibitors, phosphodiesterase inhibition) and non-pharmacological (e.g. exercise) interventions. Both of these strategies induce potent indirect antioxidant and anti-inflammatory mechanisms that may contribute to an improvement of PAD associated complications and disease progression by removing excess formation of ROS and RNS (e.g. by ameliorating primary complications such as hyperlipidemia and hypertension) as well as the normalization of the inflammatory phenotype suppressing the progression of atherosclerosis.
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Affiliation(s)
- Sebastian Steven
- Laboratory of Molecular Cardiology, Center of Cardiology, Cardiology 1, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Andreas Daiber
- Laboratory of Molecular Cardiology, Center of Cardiology, Cardiology 1, Medical Center of the Johannes Gutenberg University, Mainz, Germany.
| | - Jörn F Dopheide
- Angiology, Center of Cardiology, Cardiology 1, Medical Center of the Johannes Gutenberg University, Mainz, Germany; Swiss Cardiovascular Center, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Thomas Münzel
- Laboratory of Molecular Cardiology, Center of Cardiology, Cardiology 1, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Christine Espinola-Klein
- Angiology, Center of Cardiology, Cardiology 1, Medical Center of the Johannes Gutenberg University, Mainz, Germany.
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NADPH oxidase-2 derived superoxide drives mitochondrial transfer from bone marrow stromal cells to leukemic blasts. Blood 2017; 130:1649-1660. [PMID: 28733324 DOI: 10.1182/blood-2017-03-772939] [Citation(s) in RCA: 226] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 07/14/2017] [Indexed: 12/13/2022] Open
Abstract
Improvements in the understanding of the metabolic cross-talk between cancer and its microenvironment are expected to lead to novel therapeutic approaches. Acute myeloid leukemia (AML) cells have increased mitochondria compared with nonmalignant CD34+ hematopoietic progenitor cells. Furthermore, contrary to the Warburg hypothesis, AML relies on oxidative phosphorylation to generate adenosine triphosphate. Here we report that in human AML, NOX2 generates superoxide, which stimulates bone marrow stromal cells (BMSC) to AML blast transfer of mitochondria through AML-derived tunneling nanotubes. Moreover, inhibition of NOX2 was able to prevent mitochondrial transfer, increase AML apoptosis, and improve NSG AML mouse survival. Although mitochondrial transfer from BMSC to nonmalignant CD34+ cells occurs in response to oxidative stress, NOX2 inhibition had no detectable effect on nonmalignant CD34+ cell survival. Taken together, we identify tumor-specific dependence on NOX2-driven mitochondrial transfer as a novel therapeutic strategy in AML.
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Chen Q, Wang Q, Zhu J, Xiao Q, Zhang L. Reactive oxygen species: key regulators in vascular health and diseases. Br J Pharmacol 2017; 175:1279-1292. [PMID: 28430357 DOI: 10.1111/bph.13828] [Citation(s) in RCA: 183] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Revised: 03/31/2017] [Accepted: 04/11/2017] [Indexed: 12/18/2022] Open
Abstract
ROS are a group of small reactive molecules that play critical roles in the regulation of various cell functions and biological processes. In the vascular system, physiological levels of ROS are essential for normal vascular functions including endothelial homeostasis and smooth muscle cell contraction. In contrast, uncontrolled overproduction of ROS resulting from an imbalance of ROS generation and elimination leads to the development of vascular diseases. Excessive ROS cause vascular cell damage, the recruitment of inflammatory cells, lipid peroxidation, activation of metalloproteinases and deposition of extracellular matrix, collectively leading to vascular remodelling. Evidence from a large number of studies has revealed that ROS and oxidative stress are involved in the initiation and progression of numerous vascular diseases including hypertension, atherosclerosis, restenosis and abdominal aortic aneurysm. Furthermore, considerable research has been implemented to explore antioxidants that can reduce ROS production and oxidative stress in order to ameliorate vascular diseases. In this review, we will discuss the nature and sources of ROS, their roles in vascular homeostasis and specific vascular diseases and various antioxidants as well as some of the pharmacological agents that are capable of reducing ROS and oxidative stress. The aim of this review is to provide information for developing promising clinical strategies targeting ROS to decrease cardiovascular risks. LINKED ARTICLES This article is part of a themed section on Spotlight on Small Molecules in Cardiovascular Diseases. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v175.8/issuetoc.
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Affiliation(s)
- Qishan Chen
- Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Qiwen Wang
- Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Jianhua Zhu
- Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Qingzhong Xiao
- Centre for Clinical Pharmacology, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Li Zhang
- Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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Wang H, Hartnett ME. Roles of Nicotinamide Adenine Dinucleotide Phosphate (NADPH) Oxidase in Angiogenesis: Isoform-Specific Effects. Antioxidants (Basel) 2017; 6:antiox6020040. [PMID: 28587189 PMCID: PMC5488020 DOI: 10.3390/antiox6020040] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 05/24/2017] [Accepted: 05/31/2017] [Indexed: 12/19/2022] Open
Abstract
Angiogenesis is the formation of new blood vessels from preexisting ones and is implicated in physiologic vascular development, pathologic blood vessel growth, and vascular restoration. This is in contrast to vasculogenesis, which is de novo growth of vessels from vascular precursors, or from vascular repair that occurs when circulating endothelial progenitor cells home into an area and develop into blood vessels. The objective of this review is to discuss the isoform-specific role of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase (NOX) in physiologic and pathologic angiogenesis and vascular repair, but will not specifically address vasculogenesis. As the major source of reactive oxygen species (ROS) in vascular endothelial cells (ECs), NOX has gained increasing attention in angiogenesis. Activation of NOX leads to events necessary for physiologic and pathologic angiogenesis, including EC migration, proliferation and tube formation. However, activation of different NOX isoforms has different effects in angiogenesis. Activation of NOX2 promotes pathologic angiogenesis and vascular inflammation, but may be beneficial in revascularization in the hindlimb ischemic model. In contrast, activation of NOX4 appears to promote physiologic angiogenesis mainly by protecting the vasculature during ischemia, hypoxia and inflammation and by restoring vascularization, except in models of oxygen-induced retinopathy and diabetes where NOX4 activation leads to pathologic angiogenesis.
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Affiliation(s)
- Haibo Wang
- The John A. Moran Eye Center, University of Utah, 65 N. Mario Capecchi Drive, Salt Lake City, UT 84132, USA.
| | - M Elizabeth Hartnett
- The John A. Moran Eye Center, University of Utah, 65 N. Mario Capecchi Drive, Salt Lake City, UT 84132, USA.
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Prieto-Bermejo R, Hernández-Hernández A. The Importance of NADPH Oxidases and Redox Signaling in Angiogenesis. Antioxidants (Basel) 2017; 6:antiox6020032. [PMID: 28505091 PMCID: PMC5488012 DOI: 10.3390/antiox6020032] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 04/28/2017] [Accepted: 05/11/2017] [Indexed: 02/06/2023] Open
Abstract
Eukaryotic cells have to cope with the constant generation of reactive oxygen species (ROS). Although the excessive production of ROS might be deleterious for cell biology, there is a plethora of evidence showing that moderate levels of ROS are important for the control of cell signaling and gene expression. The family of the nicotinamide adenine dinucleotide phosphate oxidases (NADPH oxidases or Nox) has evolved to produce ROS in response to different signals; therefore, they fulfil a central role in the control of redox signaling. The role of NADPH oxidases in vascular physiology has been a field of intense study over the last two decades. In this review we will briefly analyze how ROS can regulate signaling and gene expression. We will address the implication of NADPH oxidases and redox signaling in angiogenesis, and finally, the therapeutic possibilities derived from this knowledge will be discussed.
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Affiliation(s)
- Rodrigo Prieto-Bermejo
- Department of Biochemistry and Molecular Biology, University of Salamanca, Salamanca 37007, Spain.
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Redox regulation of ischemic limb neovascularization - What we have learned from animal studies. Redox Biol 2017; 12:1011-1019. [PMID: 28505880 PMCID: PMC5430575 DOI: 10.1016/j.redox.2017.04.040] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 04/08/2017] [Accepted: 04/24/2017] [Indexed: 12/31/2022] Open
Abstract
Mouse hindlimb ischemia has been widely used as a model to study peripheral artery disease. Genetic modulation of the enzymatic source of oxidants or components of the antioxidant system reveal that physiological levels of oxidants are essential to promote the process of arteriogenesis and angiogenesis after femoral artery occlusion, although mice with diabetes or atherosclerosis may have higher deleterious levels of oxidants. Therefore, fine control of oxidants is required to stimulate vascularization in the limb muscle. Oxidants transduce cellular signaling through oxidative modifications of redox sensitive cysteine thiols. Of particular importance, the reversible modification with abundant glutathione, called S-glutathionylation (or GSH adducts), is relatively stable and alters protein function including signaling, transcription, and cytoskeletal arrangement. Glutaredoxin-1 (Glrx) is an enzyme which catalyzes reversal of GSH adducts, and does not scavenge oxidants itself. Glrx may control redox signaling under fluctuation of oxidants levels. In ischemic muscle increased GSH adducts through Glrx deletion improves in vivo limb revascularization, indicating endogenous Glrx has anti-angiogenic roles. In accordance, Glrx overexpression attenuates VEGF signaling in vitro and ischemic vascularization in vivo. There are several Glrx targets including HIF-1α which may contribute to inhibition of vascularization by reducing GSH adducts. These animal studies provide a caution that excess antioxidants may be counter-productive for treatment of ischemic limbs, and highlights Glrx as a potential therapeutic target to improve ischemic limb vascularization.
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Abstract
INTRODUCTION Research reveals cardiac regeneration exists at levels previously deemed unattainable. Clinical trials using stem cells demonstrate promising cardiomyogenic and regenerative potential but insufficient contractile recovery. Incomplete understanding of the biology of administered cells likely contributes to inconsistent patient outcomes. Metabolism is a core component of many well-characterized stem cell types, and metabolic changes fundamentally alter stem cell fate from self-renewal to lineage commitment, and vice versa. However, the metabolism of stem cells currently studied for cardiac regeneration remains incompletely understood. Areas covered: Key metabolic features of stem cells are reviewed and unique stem cell metabolic characteristics are discussed. Metabolic changes altering stem cell fate are considered from quiescence and self-renewal to lineage commitment. Key metabolic concepts are applied toward examining cardiac regeneration through stem cell-based approaches, and clinical implications of current cell therapies are evaluated to identify potential areas of improvement. Expert commentary: The metabolism and biology of stem cells used for cardiac therapy remain poorly characterized. A growing appreciation for the fundamental relationship between stem cell functionality and metabolic phenotype is developing. Future studies unraveling links between cardiac stem cell metabolism and regenerative potential may considerably improve treatment strategies and therapeutic outcomes.
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Affiliation(s)
- Dieter A Kubli
- a San Diego State University , Integrated Regenerative Research Institute , San Diego , CA , USA
| | - Mark A Sussman
- a San Diego State University , Integrated Regenerative Research Institute , San Diego , CA , USA
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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: 157] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [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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Hakami NY, Ranjan AK, Hardikar AA, Dusting GJ, Peshavariya HM. Role of NADPH Oxidase-4 in Human Endothelial Progenitor Cells. Front Physiol 2017; 8:150. [PMID: 28386230 PMCID: PMC5362645 DOI: 10.3389/fphys.2017.00150] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 02/24/2017] [Indexed: 01/21/2023] Open
Abstract
Introduction: Endothelial progenitor cells (EPCs) display a unique ability to promote angiogenesis and restore endothelial function in injured blood vessels. NADPH oxidase 4 (NOX4)-derived hydrogen peroxide (H2O2) serves as a signaling molecule and promotes endothelial cell proliferation and migration as well as protecting against cell death. However, the role of NOX4 in EPC function is not completely understood. Methods: EPCs were isolated from human saphenous vein and mammary artery discarded during bypass surgery. NOX4 gene and protein expression in EPCs were measured by real time-PCR and Western blot analysis respectively. NOX4 gene expression was inhibited using an adenoviral vector expressing human NOX4 shRNA (Ad-NOX4i). H2O2 production was measured by Amplex red assay. EPC migration was evaluated using a transwell migration assay. EPC proliferation and viability were measured using trypan blue counts. Results: Inhibition of NOX4 using Ad-NOX4i reduced Nox4 gene and protein expression as well as H2O2 formation in EPCs. Inhibition of NOX4-derived H2O2 decreased both proliferation and migration of EPCs. Interestingly, pro-inflammatory cytokine tumor necrosis factor alpha (TNFα) decreased NOX4 expression and reduced survival of EPCs. However, the survival of EPCs was further diminished by TNF-α in NOX4-knockdown cells, suggesting that NOX4 has a protective role in EPCs. Conclusion: These findings suggest that NOX4-type NADPH oxidase is important for proliferation and migration functions of EPCs and protects against pro-inflammatory cytokine induced EPC death. These properties of NOX4 may facilitate the efficient function of EPCs which is vital for successful neovascularization.
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Affiliation(s)
- Nora Y Hakami
- Centre for Eye Research Australia, Royal Victorian Eye and Ear HospitalEast Melbourne, VIC, Australia; Ophthalmology, University of Melbourne, Department of SurgeryEast Melbourne, VIC, Australia; Department of Pharmacology and Therapeutics, University of MelbourneMelbourne, VIC, Australia; Faculty of Applied Medical Sciences, King Abdulaziz UniversityJeddah, Saudi Arabia
| | - Amaresh K Ranjan
- Cardiology, Icahn School of Medicine at Mount Sinai Hospital New York, NY, USA
| | - Anandwardhan A Hardikar
- Diabetes and Islet Biology, NHMRC Clinical Trials Centre, University of Sydney Sydney, NSW, Australia
| | - Greg J Dusting
- Centre for Eye Research Australia, Royal Victorian Eye and Ear HospitalEast Melbourne, VIC, Australia; Ophthalmology, University of Melbourne, Department of SurgeryEast Melbourne, VIC, Australia
| | - Hitesh M Peshavariya
- Centre for Eye Research Australia, Royal Victorian Eye and Ear HospitalEast Melbourne, VIC, Australia; Ophthalmology, University of Melbourne, Department of SurgeryEast Melbourne, VIC, Australia
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Pan L, Ye X, Ding J, Zhou Y. Antiproliferation effect of the uremic toxin para‑cresol on endothelial progenitor cells is related to its antioxidant activity. Mol Med Rep 2017; 15:2308-2312. [PMID: 28260040 PMCID: PMC5364822 DOI: 10.3892/mmr.2017.6230] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 01/10/2017] [Indexed: 01/14/2023] Open
Abstract
Endothelial dysfunction and impaired endothelial regenerative capacity are key contributors to the high incidence of cardiovascular disease in patients with chronic kidney disease (CKD). Uremic toxins are associated with this pathogenesis. Previous studies have revealed that a uremic toxin, para-cresol (p-cresol), exerts an antiproliferation effect on human endothelial progenitor cells (EPCs), but the mechanism remains unclear. In the present study, reactive oxygen species (ROS) were confirmed to function as signaling molecules that regulate growth factor-dependent EPC proliferation. EPCs were treated with p-cresol for 72 h, using a concentration range typically found in CKD patients. ROS production was analyzed by fluorescence microscopy and flow cytometry, and protein expression levels of nicotinamide adenine dinucleotide phosphate oxidase, a major source of ROS, were analyzed by western blot analysis. mRNA expression levels of antioxidant genes were assessed by reverse transcription-quantitative polymerase chain reaction analysis. The results revealed that p-cresol partially inhibits ROS production, and this effect may be associated with a significant reduction in cytochrome b-245 alpha and beta chain expression in EPCs. An increase of glutathione peroxidase 4 mRNA expression was also detected. In conclusion, the present study revealed that the antiproliferation effect of p-cresol on EPCs might act via its antioxidant activity. The results of the present study may facilitate understanding of uremic toxin toxicity on the cardiovascular system.
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Affiliation(s)
- Limin Pan
- Department of Anesthesiology, The Third Affiliated Hospital to Wenzhou Medical College, Rui'an, Zhejiang 325200, P.R. China
| | - Xiaoting Ye
- Department of Anesthesiology, The Third Affiliated Hospital to Wenzhou Medical College, Rui'an, Zhejiang 325200, P.R. China
| | - Jiguang Ding
- Department of Infectious Diseases, The Third Affiliated Hospital to Wenzhou Medical College, Rui'an, Zhejiang 325200, P.R. China
| | - Yu Zhou
- Department of Infectious Diseases, The Third Affiliated Hospital to Wenzhou Medical College, Rui'an, Zhejiang 325200, P.R. China
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Shill DD, Southern WM, Willingham TB, Lansford KA, McCully KK, Jenkins NT. Mitochondria-specific antioxidant supplementation does not influence endurance exercise training-induced adaptations in circulating angiogenic cells, skeletal muscle oxidative capacity or maximal oxygen uptake. J Physiol 2016; 594:7005-7014. [PMID: 27501153 PMCID: PMC5134375 DOI: 10.1113/jp272491] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 08/02/2016] [Indexed: 01/01/2023] Open
Abstract
KEY POINTS Reducing excessive oxidative stress, through chronic exercise or antioxidants, can decrease the negative effects induced by excessive amounts of oxidative stress. Transient increases in oxidative stress produced during acute exercise facilitate beneficial vascular training adaptations, but the effects of non-specific antioxidants on exercise training-induced vascular adaptations remain elusive. Circulating angiogenic cells (CACs) are an exercise-inducible subset of white blood cells that maintain vascular integrity. We investigated whether mitochondria-specific antioxidant (MitoQ) supplementation would affect the response to 3 weeks of endurance exercise training in CACs, muscle mitochondrial capacity and maximal oxygen uptake in young healthy men. We show that endurance exercise training increases multiple CAC types, an adaptation that is not altered by MitoQ supplementation. Additionally, MitoQ does not affect skeletal muscle or whole-body aerobic adaptations to exercise training. These results indicate that MitoQ supplementation neither enhances nor attenuates endurance training adaptations in young healthy men. ABSTRACT Antioxidants have been shown to improve endothelial function and cardiovascular outcomes. However, the effects of antioxidants on exercise training-induced vascular adaptations remain elusive. General acting antioxidants combined with exercise have not impacted circulating angiogenic cells (CACs). We investigated whether mitochondria-specific antioxidant (MitoQ) supplementation would affect the response to 3 weeks of endurance exercise training on CD3+ , CD3+ /CD31+ , CD14+ /CD31+ , CD31+ , CD34+ /VEGFR2+ and CD62E+ peripheral blood mononuclear cells (PBMCs), muscle mitochondrial capacity, and maximal oxygen uptake (VO2 max ) in healthy men aged 22.1 ± 0.7 years, with a body mass index of 26.9 ± 0.9 kg m-2 , and 24.8 ± 1.3% body fat. Analysis of main effects revealed that training induced 33, 105 and 285% increases in CD14+ /CD31+ , CD62E+ and CD34+ /VEGFR2+ CACs, respectively, and reduced CD3+ /CD31- PBMCs by 14%. There was no effect of MitoQ on CAC levels. Also independent of MitoQ supplementation, exercise training significantly increased quadriceps muscle mitochondrial capacity by 24% and VO2 max by roughly 7%. In conclusion, endurance exercise training induced increases in multiple CAC types, and this adaptation is not modified by MitoQ supplementation. Furthermore, we demonstrate that a mitochondrial-targeted antioxidant does not influence skeletal muscle or whole-body aerobic adaptations to exercise training.
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Nox2 contributes to the arterial endothelial specification of mouse induced pluripotent stem cells by upregulating Notch signaling. Sci Rep 2016; 6:33737. [PMID: 27642005 PMCID: PMC5027389 DOI: 10.1038/srep33737] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 09/02/2016] [Indexed: 12/18/2022] Open
Abstract
Reactive oxygen species (ROS) have a crucial role in stem-cell differentiation; however, the mechanisms by which ROS regulate the differentiation of stem cells into endothelial cells (ECs) are unknown. Here, we determine the role of ROS produced by NADPH oxidase 2 (Nox2) in the endothelial-lineage specification of mouse induced-pluripotent stem cells (miPSCs). When wild-type (WT) and Nox2-knockout (Nox2−/−) miPSCs were differentiated into ECs (miPSC-ECs), the expression of endothelial markers, arterial endothelial markers, pro-angiogenic cytokines, and Notch pathway components was suppressed in the Nox2−/− cells but increased in both WT and Nox2−/− miPSCs when Nox2 expression was upregulated. Higher levels of Nox2 expression increased Notch signaling and arterial EC differentiation, and this increase was abolished by the inhibition of ROS generation or by the silencing of Notch1 expression. Nox2 deficiency was associated with declines in the survival and angiogenic potency of miPSC-ECs, and capillary and arterial density were lower in the ischemic limbs of mice after treatment with Nox2−/− miPSC-ECs than WT miPSC-EC treatment. Taken together, these observations indicate that Nox2-mediated ROS production promotes arterial EC specification in differentiating miPSCs by activating the Notch signaling pathway and contributes to the angiogenic potency of transplanted miPSC-derived ECs.
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