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Hahn O, Waheed TO, Sridharan K, Huemerlehner T, Staehlke S, Thürling M, Boeckmann L, Meister M, Masur K, Peters K. Cold Atmospheric Pressure Plasma-Activated Medium Modulates Cellular Functions of Human Mesenchymal Stem/Stromal Cells In Vitro. Int J Mol Sci 2024; 25:4944. [PMID: 38732164 PMCID: PMC11084445 DOI: 10.3390/ijms25094944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 04/24/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024] Open
Abstract
Cold atmospheric pressure plasma (CAP) offers a variety of therapeutic possibilities and induces the formation of reactive chemical species associated with oxidative stress. Mesenchymal stem/stromal cells (MSCs) play a central role in tissue regeneration, partly because of their antioxidant properties and ability to migrate into regenerating areas. During the therapeutic application, MSCs are directly exposed to the reactive species of CAP. Therefore, the investigation of CAP-induced effects on MSCs is essential. In this study, we quantified the amount of ROS due to the CAP activation of the culture medium. In addition, cell number, metabolic activity, stress signals, and migration were analyzed after the treatment of MSCs with a CAP-activated medium. CAP-activated media induced a significant increase in ROS but did not cause cytotoxic effects on MSCs when the treatment was singular and short-term (one day). This single treatment led to increased cell migration, an essential process in wound healing. In parallel, there was an increase in various cell stress proteins, indicating an adaptation to oxidative stress. Repeated treatments with the CAP-activated medium impaired the viability of the MSCs. The results shown here provide information on the influence of treatment frequency and intensity, which could be necessary for the therapeutic application of CAP.
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Affiliation(s)
- Olga Hahn
- Institute of Cell Biology, Rostock University Medical Center, 18057 Rostock, Germany; (O.H.); (T.O.W.); (K.S.); (T.H.); (S.S.)
| | - Tawakalitu Okikiola Waheed
- Institute of Cell Biology, Rostock University Medical Center, 18057 Rostock, Germany; (O.H.); (T.O.W.); (K.S.); (T.H.); (S.S.)
| | - Kaarthik Sridharan
- Institute of Cell Biology, Rostock University Medical Center, 18057 Rostock, Germany; (O.H.); (T.O.W.); (K.S.); (T.H.); (S.S.)
| | - Thomas Huemerlehner
- Institute of Cell Biology, Rostock University Medical Center, 18057 Rostock, Germany; (O.H.); (T.O.W.); (K.S.); (T.H.); (S.S.)
| | - Susanne Staehlke
- Institute of Cell Biology, Rostock University Medical Center, 18057 Rostock, Germany; (O.H.); (T.O.W.); (K.S.); (T.H.); (S.S.)
| | - Mario Thürling
- Microfluidics, Faculty of Mechanical Engineering and Marine Technology, University of Rostock, 18059 Rostock, Germany;
| | - Lars Boeckmann
- Clinic and Polyclinic for Dermatology and Venerology Rostock, Rostock University Medical Center, 18057 Rostock, Germany;
| | - Mareike Meister
- Leibniz-Institute for Plasma Science and Technology e.V., 17489 Greifswald, Germany; (M.M.); (K.M.)
| | - Kai Masur
- Leibniz-Institute for Plasma Science and Technology e.V., 17489 Greifswald, Germany; (M.M.); (K.M.)
| | - Kirsten Peters
- Institute of Cell Biology, Rostock University Medical Center, 18057 Rostock, Germany; (O.H.); (T.O.W.); (K.S.); (T.H.); (S.S.)
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2
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Qian J, Liang T, Xu Y, Liu ZP, Jing LL, Luo HB. Effect of the Novel Free Radical Scavenger 4'-Hydroxyl-2-Substituted Phenylnitronyl Nitroxide on Oxidative Stress, Mitochondrial Dysfunction and Apoptosis Induced by Cerebral Ischemia-Reperfusion in Rats. Neuroscience 2024; 540:1-11. [PMID: 38242279 DOI: 10.1016/j.neuroscience.2023.12.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 12/19/2023] [Accepted: 12/28/2023] [Indexed: 01/21/2024]
Abstract
Mitochondrial dysfunction, which results in the overproduction of oxygen free radicals, is a crucial mechanism underlying cerebral ischemia-reperfusion injury. 4'-Hydroxyl-2-substituted phenylnitronyl nitroxide (HPN), which is an antioxidant and free radical scavenger, can effectively scavenge oxygen free radicals, suggesting its potential as a protective agent against cerebral ischemia-reperfusion injury. In this study, we investigated the effects of HPN on mitochondrial function and apoptosis following cerebral ischemia/reperfusion injury in rats. Healthy adult SD rats were chosen as the experimental subjects, and the rat ischemia/reperfusion injury model was generated using the modified Zea Longa method. The administration of HPN significantly enhanced the activity of endogenous antioxidant enzymes, such as superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and catalase (CAT). Additionally, HPN effectively preserved the morphology and function of mitochondria, reduced the protein and gene expression of Caspase-3 and Bax, increased the protein and gene expression of Bcl-2, mitigated neuronal apoptosis, improved neurological deficits, and decreased the volume of cerebral infarction. Of interest, the protective effect on brain tissue was more evident with increasing doses of HPN. These findings indicate that HPN can serve as an effective protective agent against cerebral ischemia-reperfusion injury.
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Affiliation(s)
- Jun Qian
- Department of Neurology, Fifth Affiliated Hospital of Zunyi Medical University, Zhuhai, PR China
| | - Tao Liang
- Department of Neurology, Affiliated Hospital of Zunyi Medical University, Zunyi, PR China
| | - Yu Xu
- Department of Respiratory Medicine, Fifth Affiliated Hospital of Zunyi Medical University, Zhuhai, PR China
| | - Zhi-Peng Liu
- Department of Neurology, Fifth Affiliated Hospital of Zunyi Medical University, Zhuhai, PR China
| | - Lin-Lin Jing
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, PR China
| | - Hong-Bo Luo
- Department of Neurology, Fifth Affiliated Hospital of Zunyi Medical University, Zhuhai, PR China.
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3
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Gallo G, Rubattu S, Volpe M. Mitochondrial Dysfunction in Heart Failure: From Pathophysiological Mechanisms to Therapeutic Opportunities. Int J Mol Sci 2024; 25:2667. [PMID: 38473911 DOI: 10.3390/ijms25052667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 02/17/2024] [Accepted: 02/24/2024] [Indexed: 03/14/2024] Open
Abstract
Mitochondrial dysfunction, a feature of heart failure, leads to a progressive decline in bioenergetic reserve capacity, consisting in a shift of energy production from mitochondrial fatty acid oxidation to glycolytic pathways. This adaptive process of cardiomyocytes does not represent an effective strategy to increase the energy supply and to restore the energy homeostasis in heart failure, thus contributing to a vicious circle and to disease progression. The increased oxidative stress causes cardiomyocyte apoptosis, dysregulation of calcium homeostasis, damage of proteins and lipids, leakage of mitochondrial DNA, and inflammatory responses, finally stimulating different signaling pathways which lead to cardiac remodeling and failure. Furthermore, the parallel neurohormonal dysregulation with angiotensin II, endothelin-1, and sympatho-adrenergic overactivation, which occurs in heart failure, stimulates ventricular cardiomyocyte hypertrophy and aggravates the cellular damage. In this review, we will discuss the pathophysiological mechanisms related to mitochondrial dysfunction, which are mainly dependent on increased oxidative stress and perturbation of the dynamics of membrane potential and are associated with heart failure development and progression. We will also provide an overview of the potential implication of mitochondria as an attractive therapeutic target in the management and recovery process in heart failure.
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Affiliation(s)
- Giovanna Gallo
- Department of Clinical and Molecular Medicine, Sapienza University of Rome, Via di Grottarossa 1035-1039, 00189 Rome, RM, Italy
| | - Speranza Rubattu
- Department of Clinical and Molecular Medicine, Sapienza University of Rome, Via di Grottarossa 1035-1039, 00189 Rome, RM, Italy
- IRCCS Neuromed, 86077 Pozzilli, IS, Italy
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4
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Tavleeva MM, Rasova EE, Rybak AV, Belykh ES, Fefilova EA, Pnachina EM, Velegzhaninov IO. Dose-Dependent Effect of Mitochondrial Superoxide Dismutase Gene Overexpression on Radioresistance of HEK293T Cells. Int J Mol Sci 2023; 24:17315. [PMID: 38139144 PMCID: PMC10744337 DOI: 10.3390/ijms242417315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 12/04/2023] [Accepted: 12/08/2023] [Indexed: 12/24/2023] Open
Abstract
Over the last two decades, a multitude of gain-of-function studies have been conducted on genes that encode antioxidative enzymes, including one of the key enzymes, manganese superoxide dismutase (SOD2). The results of such studies are often contradictory, as they strongly depend on many factors, such as the gene overexpression level. In this study, the effect of altering the ectopic expression level of major transcript variants of the SOD2 gene on the radioresistance of HEK293T cells was investigated using CRISPRa technology. A significant increase in cell viability in comparison with the transfection control was detected in cells with moderate SOD2 overexpression after irradiation at 2 Gy, but not at 3 or 5 Gy. A further increase in the level of SOD2 ectopic expression up to 22.5-fold resulted in increased cell viability detectable only after irradiation at 5 Gy. Furthermore, a 15-20-fold increase in SOD2 expression raised the clonogenic survival of cells after irradiation at 5 Gy. Simultaneous overexpression of genes encoding SOD2 and Catalase (CAT) enhanced clonogenic cell survival after irradiation more effectively than separate overexpression of both. In conjunction with the literature data on the suppression of the procarcinogenic effects of superoxide dismutase overexpression by ectopic expression of CAT, the data presented here suggest the potential efficacy of simultaneous overexpression of SOD2 and CAT to reduce oxidative stress occurring in various pathological processes. Moreover, these results illustrate the importance of selecting the degree of SOD2 overexpression to obtain a protective effect.
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Affiliation(s)
- Marina M. Tavleeva
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28b Kommunisticheskaya St., Syktyvkar 167982, Russia; (M.M.T.); (E.E.R.); (A.V.R.); (E.S.B.)
| | - Elena E. Rasova
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28b Kommunisticheskaya St., Syktyvkar 167982, Russia; (M.M.T.); (E.E.R.); (A.V.R.); (E.S.B.)
| | - Anna V. Rybak
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28b Kommunisticheskaya St., Syktyvkar 167982, Russia; (M.M.T.); (E.E.R.); (A.V.R.); (E.S.B.)
| | - Elena S. Belykh
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28b Kommunisticheskaya St., Syktyvkar 167982, Russia; (M.M.T.); (E.E.R.); (A.V.R.); (E.S.B.)
| | - Elizaveta A. Fefilova
- Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., St. Petersburg 194064, Russia;
| | - Elizaveta M. Pnachina
- Institute of Biology and Biomedicine, Lobachevsky State University of Nizhny Novgorod, 23 Gagarin Ave., Nizhny Novgorod 603950, Russia;
| | - Ilya O. Velegzhaninov
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28b Kommunisticheskaya St., Syktyvkar 167982, Russia; (M.M.T.); (E.E.R.); (A.V.R.); (E.S.B.)
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5
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Okoye CN, Koren SA, Wojtovich AP. Mitochondrial complex I ROS production and redox signaling in hypoxia. Redox Biol 2023; 67:102926. [PMID: 37871533 PMCID: PMC10598411 DOI: 10.1016/j.redox.2023.102926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/29/2023] [Accepted: 10/06/2023] [Indexed: 10/25/2023] Open
Abstract
Mitochondria are a main source of cellular energy. Oxidative phosphorylation (OXPHOS) is the major process of aerobic respiration. Enzyme complexes of the electron transport chain (ETC) pump protons to generate a protonmotive force (Δp) that drives OXPHOS. Complex I is an electron entry point into the ETC. Complex I oxidizes nicotinamide adenine dinucleotide (NADH) and transfers electrons to ubiquinone in a reaction coupled with proton pumping. Complex I also produces reactive oxygen species (ROS) under various conditions. The enzymatic activities of complex I can be regulated by metabolic conditions and serves as a regulatory node of the ETC. Complex I ROS plays diverse roles in cell metabolism ranging from physiologic to pathologic conditions. Progress in our understanding indicates that ROS release from complex I serves important signaling functions. Increasing evidence suggests that complex I ROS is important in signaling a mismatch in energy production and demand. In this article, we review the role of ROS from complex I in sensing acute hypoxia.
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Affiliation(s)
- Chidozie N Okoye
- Department of Anesthesiology and Perioperative Medicine, University of Rochester Medical Center, Rochester, NY, 14642, USA
| | - Shon A Koren
- Department of Neurobiology, Harvard Medical School, Boston, MA, 02115, USA
| | - Andrew P Wojtovich
- Department of Anesthesiology and Perioperative Medicine, University of Rochester Medical Center, Rochester, NY, 14642, USA; Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY, 14642, USA.
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6
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Kang R, Laborde C, Savchenko L, Swiader A, Pizzinat N, Marsal D, Sainte-Marie Y, Boal F, Tronchere H, Roncalli J, Kunduzova O. Age-Related Shift in Cardiac and Metabolic Phenotyping Linked to Inflammatory Cytokines and Antioxidant Status in Mice. Int J Mol Sci 2023; 24:15841. [PMID: 37958823 PMCID: PMC10650425 DOI: 10.3390/ijms242115841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/18/2023] [Accepted: 10/27/2023] [Indexed: 11/15/2023] Open
Abstract
Age-related alterations in cardiac function, metabolic, inflammatory and antioxidant profiles are associated with an increased risk of cardiovascular mortality and morbidity. Here, we examined cardiac and metabolic phenotypes in relation to inflammatory status and antioxidant capacity in young, middle-aged and old mice. Real-time reverse transcription-polymerase chain reactions were performed on myocardium and immunoassays on plasma. Left ventricular (LV) structure and function were assessed by echocardiography using high-frequency ultrasound. Middle-aged mice exhibited an altered metabolic profile and antioxidant capacity compared to young mice, whereas myocardial expression of inflammatory factors (TNFα, IL1β, IL6 and IL10) remained unchanged. In contrast, old mice exhibited increased expression of inflammatory cytokines and plasma levels of resistin compared to young and middle-aged mice (p < 0.05). The pro-inflammatory signature of aged hearts was associated with alterations in glutathione redox homeostasis and elevated contents of 4-hydroxynonenal (4-HNE), a marker of lipid peroxidation and oxidative stress. Furthermore, echocardiographic parameters of LV systolic and diastolic functions were significantly altered in old mice compared to young mice. Taken together, these findings suggest age-related shifts in cardiac phenotype encompass the spectrum of metabo-inflammatory abnormalities and altered redox homeostasis.
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Affiliation(s)
- Ryeonshi Kang
- National Institute of Health and Medical Research (INSERM) U1297, CEDEX 4, 31432 Toulouse, France; (R.K.); (L.S.); (A.S.); (N.P.); (D.M.); (Y.S.-M.); (F.B.); (H.T.); (J.R.)
- University of Toulouse III, CEDEX 9, 31062 Toulouse, France;
| | | | - Lesia Savchenko
- National Institute of Health and Medical Research (INSERM) U1297, CEDEX 4, 31432 Toulouse, France; (R.K.); (L.S.); (A.S.); (N.P.); (D.M.); (Y.S.-M.); (F.B.); (H.T.); (J.R.)
- University of Toulouse III, CEDEX 9, 31062 Toulouse, France;
- Department of Internal Medicine, Poltava State Medical University, 23 Shevchenko, 36000 Poltava, Ukraine
| | - Audrey Swiader
- National Institute of Health and Medical Research (INSERM) U1297, CEDEX 4, 31432 Toulouse, France; (R.K.); (L.S.); (A.S.); (N.P.); (D.M.); (Y.S.-M.); (F.B.); (H.T.); (J.R.)
- University of Toulouse III, CEDEX 9, 31062 Toulouse, France;
| | - Nathalie Pizzinat
- National Institute of Health and Medical Research (INSERM) U1297, CEDEX 4, 31432 Toulouse, France; (R.K.); (L.S.); (A.S.); (N.P.); (D.M.); (Y.S.-M.); (F.B.); (H.T.); (J.R.)
- University of Toulouse III, CEDEX 9, 31062 Toulouse, France;
| | - Dimitri Marsal
- National Institute of Health and Medical Research (INSERM) U1297, CEDEX 4, 31432 Toulouse, France; (R.K.); (L.S.); (A.S.); (N.P.); (D.M.); (Y.S.-M.); (F.B.); (H.T.); (J.R.)
- University of Toulouse III, CEDEX 9, 31062 Toulouse, France;
| | - Yannis Sainte-Marie
- National Institute of Health and Medical Research (INSERM) U1297, CEDEX 4, 31432 Toulouse, France; (R.K.); (L.S.); (A.S.); (N.P.); (D.M.); (Y.S.-M.); (F.B.); (H.T.); (J.R.)
- University of Toulouse III, CEDEX 9, 31062 Toulouse, France;
| | - Frederic Boal
- National Institute of Health and Medical Research (INSERM) U1297, CEDEX 4, 31432 Toulouse, France; (R.K.); (L.S.); (A.S.); (N.P.); (D.M.); (Y.S.-M.); (F.B.); (H.T.); (J.R.)
- University of Toulouse III, CEDEX 9, 31062 Toulouse, France;
| | - Helene Tronchere
- National Institute of Health and Medical Research (INSERM) U1297, CEDEX 4, 31432 Toulouse, France; (R.K.); (L.S.); (A.S.); (N.P.); (D.M.); (Y.S.-M.); (F.B.); (H.T.); (J.R.)
- University of Toulouse III, CEDEX 9, 31062 Toulouse, France;
| | - Jerome Roncalli
- National Institute of Health and Medical Research (INSERM) U1297, CEDEX 4, 31432 Toulouse, France; (R.K.); (L.S.); (A.S.); (N.P.); (D.M.); (Y.S.-M.); (F.B.); (H.T.); (J.R.)
- Department of Cardiology, University Hospital of Toulouse, CEDEX 9, 31400 Toulouse, France
| | - Oksana Kunduzova
- National Institute of Health and Medical Research (INSERM) U1297, CEDEX 4, 31432 Toulouse, France; (R.K.); (L.S.); (A.S.); (N.P.); (D.M.); (Y.S.-M.); (F.B.); (H.T.); (J.R.)
- University of Toulouse III, CEDEX 9, 31062 Toulouse, France;
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7
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Tarbashevich K, Ermlich L, Wegner J, Pfeiffer J, Raz E. The mitochondrial protein Sod2 is important for the migration, maintenance, and fitness of germ cells. Front Cell Dev Biol 2023; 11:1250643. [PMID: 37954204 PMCID: PMC10639133 DOI: 10.3389/fcell.2023.1250643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 10/16/2023] [Indexed: 11/14/2023] Open
Abstract
To maintain a range of cellular functions and to ensure cell survival, cells must control their levels of reactive oxygen species (ROS). The main source of these molecules is the mitochondrial respiration machinery, and the first line of defense against these toxic substances is the mitochondrial enzyme superoxide dismutase 2 (Sod2). Thus, investigating early expression patterns and functions of this protein is critical for understanding how an organism develops ways to protect itself against ROS and enhance tissue fitness. Here, we report on expression pattern and function of zebrafish Sod2, focusing on the role of the protein in migration and maintenance of primordial germ cells during early embryonic development. We provide evidence that Sod2 is involved in purifying selection of vertebrate germ cells, which can contribute to the fitness of the organism in the following generations.
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Affiliation(s)
- Katsiaryna Tarbashevich
- Institute of Cell Biology, Center for Molecular Biology of Inflammation (ZMBE), Muenster, Germany
| | - Laura Ermlich
- Institute of Cell Biology, Center for Molecular Biology of Inflammation (ZMBE), Muenster, Germany
| | - Julian Wegner
- Institute of Cell Biology, Center for Molecular Biology of Inflammation (ZMBE), Muenster, Germany
| | - Jana Pfeiffer
- Institute of Cell Biology, Center for Molecular Biology of Inflammation (ZMBE), Muenster, Germany
| | - Erez Raz
- Institute of Cell Biology, Center for Molecular Biology of Inflammation (ZMBE), Muenster, Germany
- Max Planck Institute for Molecular Biomedicine, Münster, Germany
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8
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Murphy E, Liu JC. Mitochondrial calcium and reactive oxygen species in cardiovascular disease. Cardiovasc Res 2023; 119:1105-1116. [PMID: 35986915 PMCID: PMC10411964 DOI: 10.1093/cvr/cvac134] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 05/26/2022] [Accepted: 06/02/2022] [Indexed: 08/11/2023] Open
Abstract
Cardiomyocytes are one of the most mitochondria-rich cell types in the body, with ∼30-40% of the cell volume being composed of mitochondria. Mitochondria are well established as the primary site of adenosine triphosphate (ATP) generation in a beating cardiomyocyte, generating up to 90% of its ATP. Mitochondria have many functions in the cell, which could contribute to susceptibility to and development of cardiovascular disease (CVD). Mitochondria are key players in cell metabolism, ATP production, reactive oxygen species (ROS) production, and cell death. Mitochondrial calcium (Ca2+) plays a critical role in many of these pathways, and thus the dynamics of mitochondrial Ca2+ are important in regulating mitochondrial processes. Alterations in these varied and in many cases interrelated functions play an important role in CVD. This review will focus on the interrelationship of mitochondrial energetics, Ca2+, and ROS and their roles in CVD. Recent insights into the regulation and dysregulation of these pathways have led to some novel therapeutic approaches.
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Affiliation(s)
- Elizabeth Murphy
- NHLBI, NIH, Bethesda, MD and Department of Integrative Biology and Physiology, University of Minnesota, 2231 6th St. SE, Minneapolis, MN 55455, USA
| | - Julia C Liu
- NHLBI, NIH, Bethesda, MD and Department of Integrative Biology and Physiology, University of Minnesota, 2231 6th St. SE, Minneapolis, MN 55455, USA
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9
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Wu L, Li Z, Yao Y. Hydrogen peroxide preconditioning is of dual role in cardiac ischemia/reperfusion. Eur J Pharmacol 2023; 947:175684. [PMID: 36997049 DOI: 10.1016/j.ejphar.2023.175684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 03/23/2023] [Accepted: 03/23/2023] [Indexed: 03/30/2023]
Abstract
Moderate reactive oxygen species (ROS) at reperfusion would trigger cardioprotection and various antioxidants for pharmacological preconditioning failed to achieve cardioprotection. The causes for different roles of preischemic ROS during cardiac ischemia/reperfusion (I/R) require reevaluation. We investigated the precise role of ROS and its working model in this study. Different doses of hydrogen peroxide (H2O2, the most stable form of ROS) were added 5 min before ischemia using isolated perfused rat hearts, only moderate-dose H2O2 preconditioning (H2O2PC) achieved contractile recovery, whereas the low dose and high dose led to injury. Similar results were observed in isolated rat cardiomyocytes on cytosolic free Ca2+ concentration ([Ca2+]c) overload, ROS production, the recovery of Ca2+ transient, and cell shortening. Based on the data mentioned above, we set up a mathematics model to describe the effects of H2O2PC with the fitting curve by the percentage of recovery of heart function and Ca2+ transient in I/R. Besides, we used the two models to define the initial thresholds of H2O2PC achieving cardioprotection. We also detected the expression of redox enzymes and Ca2+ signaling toolkits to explain the mathematics models of H2O2PC in a biological way. The expression of tyrosine 705 phosphorylation of STAT3, Nuclear factor E2-related factor 2, manganese superoxide dismutase, phospholamban, catalase, ryanodine receptors, and sarcoendoplasmic reticulum calcium ATPase 2 were similar with the control I/R and low-dose H2O2PC but were increased in the moderate H2O2PC and decreased in the high-dose H2O2PC. Thus, we concluded that preischemic ROS are of dual role in cardiac I/R.
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10
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Jain K, Gu SX, Hwa J. Cross talk on "endogenous SOD2 (superoxide dismutase) regulates platelet-dependent thrombin generation and thrombosis during aging" SOD2 in platelets: with age comes responsibility. JOURNAL OF THROMBOSIS AND HAEMOSTASIS : JTH 2023; 21:1077-1081. [PMID: 36716965 DOI: 10.1016/j.jtha.2023.01.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 01/13/2023] [Accepted: 01/18/2023] [Indexed: 01/29/2023]
Affiliation(s)
- Kanika Jain
- Yale Cardiovascular Research Center, Section of Cardiovascular Medicine, Department of Internal Medicine Yale University School of Medicine, New Haven, Connecticut, USA
| | - Sean X Gu
- Yale Cardiovascular Research Center, Section of Cardiovascular Medicine, Department of Internal Medicine Yale University School of Medicine, New Haven, Connecticut, USA; Department of Laboratory Medicine, Yale University School of Medicine, Yale New Haven Hospital, New Haven, Connecticut, USA
| | - John Hwa
- Yale Cardiovascular Research Center, Section of Cardiovascular Medicine, Department of Internal Medicine Yale University School of Medicine, New Haven, Connecticut, USA.
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11
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Felgueiras R, Neto AC, Rodrigues AR, Gouveia AM, Almeida H, Neves D. Anti-oxidant effect of metformin through AMPK/SIRT1/PGC-1α/SIRT3- independent GPx1 expression in the heart of mice with endometriosis. Horm Mol Biol Clin Investig 2022; 43:405-414. [PMID: 35796227 DOI: 10.1515/hmbci-2022-0039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 06/11/2022] [Indexed: 12/24/2022]
Abstract
OBJECTIVES Endometriosis is a gynecological disease associated with an imbalance between oxidative species production and anti-oxidative defenses. In women, endometriosis has been reported to associate with increased incidence of cardiovascular events. As such, this study aimed to analyze the oxidation-responsive AMPK/SIRT1/PGC-1α/SIRT3 pathway in the heart of a mouse model of endometriosis. The effect of metformin, an insulin-sensitizing and anti-oxidative drug with already shown positive results in endometriotic tissue was studied. METHODS Thirty-six female B6CBA/F1 mice were divided into 4 groups (Control-C, Surgery-induced Endometriosis and Metformin-EM (50 mg/kg/day orally administrated for 3 months), Endometriosis-E and Metformin-M). Immunofluorescent labelling of SIRT1 and SIRT3 was performed in the heart tissue. Assessment of expression of AMPKα, SIRT1, PGC-1α, SIRT3, SOD2, and GPx1 was performed by Western Blotting. The quantification of microRNA(miR)-34a, miR-195, miR-217, miR-155 and miR-421, involved in the regulation of expression of SIRT1 and SIRT3, was performed by Real-Time PCR. RESULTS Data showed an increase in phospho-AMPKα and in GPx1 expression in the EM group when compared to the C group, but not in the total AMPK, SIRT1, PGC-1α, SIRT3 and SOD2, suggesting a GPx1 expression increase independently of the AMPK/SIRT1/PGC-1α/SIRT3 pathway. MicroRNAs, excepting miR-217, showed a consistent trend of increase in the M group. CONCLUSIONS Our study showed that endometriosis does not significantly affect the expression of the components of the AMPK/SIRT1/PGC-1α/SIRT3 pathway in the heart. However, it indicates that an oxidative condition underlying endometriosis is required for metformin to evidence an increment in the expression of the anti-oxidative enzyme GPx1.
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Affiliation(s)
- Rodrigo Felgueiras
- Department of Biomedicine-Experimental Biology Unit, Faculty of Medicine of the University of Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde (i3S), Porto, Portugal
| | - Ana C Neto
- Department of Biomedicine-Experimental Biology Unit, Faculty of Medicine of the University of Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde (i3S), Porto, Portugal
| | - Adriana R Rodrigues
- Department of Biomedicine-Experimental Biology Unit, Faculty of Medicine of the University of Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde (i3S), Porto, Portugal
| | - Alexandra M Gouveia
- Department of Biomedicine-Experimental Biology Unit, Faculty of Medicine of the University of Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde (i3S), Porto, Portugal
| | - Henrique Almeida
- Department of Biomedicine-Experimental Biology Unit, Faculty of Medicine of the University of Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde (i3S), Porto, Portugal
| | - Delminda Neves
- Department of Biomedicine-Experimental Biology Unit, Faculty of Medicine of the University of Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde (i3S), Porto, Portugal
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12
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Gauba K, Gupta S, Shekhawat J, Dutt N, Yadav D, Nag VL, Rao M, Sharma P, Banerjee M. Gene expression, levels and polymorphism (Ala16Val) of Mitochondrial Superoxide Dismutase in Tuberculosis patients of Rajasthan. Microbes Infect 2022; 25:105075. [PMID: 36356830 DOI: 10.1016/j.micinf.2022.105075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 10/31/2022] [Accepted: 11/03/2022] [Indexed: 11/09/2022]
Abstract
BACKGROUND Infectious diseases cause redox imbalance and oxidative stress (OS) in host. Superoxide Dismutases(SOD) decrease this OS. SOD2 gene polymorphism can influence the expression and levels of enzyme. AIM To investigate the association of genetic polymorphism of MnSOD with enzyme levels and mRNA expression in TB patients. METHODS A total of 87 TB patients and 85 healthy individuals participated in the study. The serum SOD2 levels were measured by ELISA. Gene polymorphism was analysed using PCR-RFLP with BsaW1 as the restriction enzyme. Expression was studied by Real-TimePCR. Statistical significance was determined using the Mann-Whitney, Chi-square and Kruskal-Wallis tests and p value < 0.05 was considered statistically significant. RESULTS The median(IQR) serum SOD2 levels of TB patients were lower than those of healthy subjects (4.64(6.48) vs 11.35(20.36)ng/mL respectively,p < 0.001). SOD2 expression was significantly down-regulated in TB patients with a fold change value of 0.312. The Val/Val genotype was higher in the patient group than healthy subjects (36.8% vs 23.5%). However, the difference observed between serum SOD2 levels and mRNA expression in the different genotypes were statistically non-significant. CONCLUSION Significant difference was found between levels and expression of SOD2 in TB patients and healthy controls, but not for SOD2 gene polymorphism.
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Affiliation(s)
- Kavya Gauba
- Department of Biochemistry, All India Institute of Medical Sciences Jodhpur, 342005, India
| | - Shruti Gupta
- Department of Biochemistry, All India Institute of Medical Sciences Jodhpur, 342005, India
| | - Jyoti Shekhawat
- Department of Biochemistry, All India Institute of Medical Sciences Jodhpur, 342005, India
| | - Naveen Dutt
- Department of Pulmonary Medicine, All India Institute of Medical Sciences Jodhpur, 342005, India
| | - Dharmveer Yadav
- Department of Biochemistry, All India Institute of Medical Sciences Jodhpur, 342005, India
| | - Vijaya Lakshmi Nag
- Department of Microbiology, All India Institute of Medical Sciences Jodhpur, 342005, India
| | - Mahadev Rao
- Department of Pharmacy Practice, Manipal College of Pharmaceutical Sciences Manipal, 576104, India
| | - Praveen Sharma
- Department of Biochemistry, All India Institute of Medical Sciences Jodhpur, 342005, India
| | - Mithu Banerjee
- Department of Biochemistry, All India Institute of Medical Sciences Jodhpur, 342005, India.
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13
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Romesberg A, Van Houten B. Targeting Mitochondrial Function with Chemoptogenetics. Biomedicines 2022; 10:2459. [PMID: 36289721 PMCID: PMC9599259 DOI: 10.3390/biomedicines10102459] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 09/26/2022] [Accepted: 09/27/2022] [Indexed: 12/02/2022] Open
Abstract
Mitochondria are ATP-generating organelles in eukaryotic cells that produce reactive oxygen species (ROS) during oxidative phosphorylation (OXPHOS). Mitochondrial DNA (mtDNA) is packaged within nucleoids and, due to its close proximity to ROS production, endures oxidative base damage. This damage can be repaired by base excision repair (BER) within the mitochondria, or it can be degraded via exonucleases or mitophagy. Persistent mtDNA damage may drive the production of dysfunctional OXPHOS components that generate increased ROS, or OXPHOS components may be directly damaged by ROS, which then can cause more mtDNA damage and create a vicious cycle of ROS production and mitochondrial dysfunction. If mtDNA damage is left unrepaired, mtDNA mutations including deletions can result. The accumulation of mtDNA mutations has been associated with conditions ranging from the aging process to cancer and neurodegenerative conditions, but the sequence of events leading to mtDNA mutations and deletions is yet unknown. Researchers have utilized many systems and agents for generating ROS in mitochondria to observe the downstream effects on mtDNA, ROS, and mitochondrial function; yet, there are various drawbacks to these methodologies that limit their precision. Here, we describe a novel chemoptogenetic approach to target oxidative damage to mitochondria and mtDNA with a high spatial and temporal resolution so that the downstream effects of ROS-induced damage can be measured with a high precision in order to better understand the mechanism of mitochondrial dysfunction in aging, cancer, and neurodegenerative diseases.
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Affiliation(s)
- Amy Romesberg
- Department of Biological Sciences, College of Arts and Sciences, Carlow University, 3333 Fifth Avenue, Pittsburgh, PA 15213, USA
| | - Bennett Van Houten
- UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Department of Pharmacology and Chemical Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
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14
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Pohjoismäki JLO, Goffart S. Adaptive and Pathological Outcomes of Radiation Stress-Induced Redox Signaling. Antioxid Redox Signal 2022; 37:336-348. [PMID: 35044250 DOI: 10.1089/ars.2021.0257] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Significance: Ionizing radiation can damage cells either directly or through oxidative damage caused by ionization. Although radiation exposure from natural sources is very limited, ionizing radiation in nuclear disaster zones and long spaceflights causes inconspicuous, yet measurable physiological effects in men and animals, whose significance remains poorly known. Understanding the physiological impacts of ionizing radiation has a wide importance due to the increased use of medical imaging and radiotherapy. Recent Advances: Radiation exposure has been traditionally investigated from the perspective of DNA damage and its consequences. However, recent studies from Chernobyl as well as spaceflights have provided interesting insights into oxidative stress-induced metabolic alterations and disturbances in the circadian regulation. Critical Issues: In this review, we discuss the physiological consequences of radiation exposure in the light of oxidative stress signaling. Radiation exposure likely triggers many converging or interconnecting signaling pathways, some of which mimic mitochondrial dysfunction and might explain the observed metabolic changes. Future Directions: Better understanding of the different radiation-induced signaling pathways might help to devise strategies for mitigation of the long-term effects of radiation exposure. The utility of fibroblast growth factor 21 (FGF21) as a radiation exposure biomarker and the use of radiation hormesis as a method to protect astronauts on a prolonged spaceflight, such as a mission to Mars, should be investigated. Antioxid. Redox Signal. 37, 336-348.
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Affiliation(s)
- Jaakko L O Pohjoismäki
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
| | - Steffi Goffart
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
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15
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Jiang C, Ward NP, Prieto-Farigua N, Kang YP, Thalakola A, Teng M, DeNicola GM. A CRISPR screen identifies redox vulnerabilities for KEAP1/NRF2 mutant non-small cell lung cancer. Redox Biol 2022; 54:102358. [PMID: 35667246 PMCID: PMC9168196 DOI: 10.1016/j.redox.2022.102358] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 05/17/2022] [Accepted: 05/30/2022] [Indexed: 12/02/2022] Open
Abstract
The redox regulator NRF2 is hyperactivated in a large percentage of non-small cell lung cancer (NSCLC) cases, which is associated with chemotherapy and radiation resistance. To identify redox vulnerabilities for KEAP1/NRF2 mutant NSCLC, we conducted a CRISPR-Cas9-based negative selection screen for antioxidant enzyme genes whose loss sensitized cells to sub-lethal concentrations of the superoxide (O2•-) -generating drug β-Lapachone. While our screen identified expected hits in the pentose phosphate pathway, the thioredoxin-dependent antioxidant system, and glutathione reductase, we also identified the mitochondrial superoxide dismutase 2 (SOD2) as one of the top hits. Surprisingly, β-Lapachone did not generate mitochondrial O2•- but rather SOD2 loss enhanced the efficacy of β-Lapachone due to loss of iron-sulfur protein function, loss of mitochondrial ATP maintenance and deficient NADPH production. Importantly, inhibition of mitochondrial electron transport activity sensitized cells to β-Lapachone, demonstrating that these effects may be translated to increase ROS sensitivity therapeutically.
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Affiliation(s)
- Chang Jiang
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA.
| | - Nathan P Ward
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Nicolas Prieto-Farigua
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Yun Pyo Kang
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Anish Thalakola
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Mingxiang Teng
- Department of Biostatistics and Bioinformatics, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Gina M DeNicola
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA.
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16
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Boteanu RM, Suica VI, Uyy E, Ivan L, Cerveanu-Hogas A, Mares RG, Simionescu M, Schiopu A, Antohe F. Short-Term Blockade of Pro-Inflammatory Alarmin S100A9 Favorably Modulates Left Ventricle Proteome and Related Signaling Pathways Involved in Post-Myocardial Infarction Recovery. Int J Mol Sci 2022; 23:ijms23095289. [PMID: 35563680 PMCID: PMC9103348 DOI: 10.3390/ijms23095289] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/05/2022] [Accepted: 05/08/2022] [Indexed: 02/01/2023] Open
Abstract
Prognosis after myocardial infarction (MI) varies greatly depending on the extent of damaged area and the management of biological processes during recovery. Reportedly, the inhibition of the pro-inflammatory S100A9 reduces myocardial damage after MI. We hypothesize that a S100A9 blockade induces changes of major signaling pathways implicated in post-MI healing. Mass spectrometry-based proteomics and gene analyses of infarcted mice left ventricle were performed. The S100A9 blocker (ABR-23890) was given for 3 days after coronary ligation. At 3 and 7 days post-MI, ventricle samples were analyzed versus control and Sham-operated mice. Blockade of S100A9 modulated the expressed proteins involved in five biological processes: leukocyte cell–cell adhesion, regulation of the muscle cell apoptotic process, regulation of the intrinsic apoptotic signaling pathway, sarcomere organization and cardiac muscle hypertrophy. The blocker induced regulation of 36 proteins interacting with or targeted by the cellular tumor antigen p53, prevented myocardial compensatory hypertrophy, and reduced cardiac markers of post-ischemic stress. The blockade effect was prominent at day 7 post-MI when the quantitative features of the ventricle proteome were closer to controls. Blockade of S100A9 restores key biological processes altered post-MI. These processes could be valuable new pharmacological targets for the treatment of ischemic heart. Mass spectrometry data are available via ProteomeXchange with identifier PXD033683.
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Affiliation(s)
- Raluca Maria Boteanu
- Department of Proteomics, Institute of Cellular Biology and Pathology “N. Simionescu” of the Romanian Academy, 050568 Bucharest, Romania; (R.M.B.); (V.-I.S.); (E.U.); (L.I.); (A.C.-H.); (M.S.)
| | - Viorel-Iulian Suica
- Department of Proteomics, Institute of Cellular Biology and Pathology “N. Simionescu” of the Romanian Academy, 050568 Bucharest, Romania; (R.M.B.); (V.-I.S.); (E.U.); (L.I.); (A.C.-H.); (M.S.)
| | - Elena Uyy
- Department of Proteomics, Institute of Cellular Biology and Pathology “N. Simionescu” of the Romanian Academy, 050568 Bucharest, Romania; (R.M.B.); (V.-I.S.); (E.U.); (L.I.); (A.C.-H.); (M.S.)
| | - Luminita Ivan
- Department of Proteomics, Institute of Cellular Biology and Pathology “N. Simionescu” of the Romanian Academy, 050568 Bucharest, Romania; (R.M.B.); (V.-I.S.); (E.U.); (L.I.); (A.C.-H.); (M.S.)
| | - Aurel Cerveanu-Hogas
- Department of Proteomics, Institute of Cellular Biology and Pathology “N. Simionescu” of the Romanian Academy, 050568 Bucharest, Romania; (R.M.B.); (V.-I.S.); (E.U.); (L.I.); (A.C.-H.); (M.S.)
| | - Razvan Gheorghita Mares
- Department of Pathophysiology, University of Medicine, Pharmacy, Sciences and Technology of Targu Mures, 540142 Targu Mures, Romania; (R.G.M.); (A.S.)
| | - Maya Simionescu
- Department of Proteomics, Institute of Cellular Biology and Pathology “N. Simionescu” of the Romanian Academy, 050568 Bucharest, Romania; (R.M.B.); (V.-I.S.); (E.U.); (L.I.); (A.C.-H.); (M.S.)
| | - Alexandru Schiopu
- Department of Pathophysiology, University of Medicine, Pharmacy, Sciences and Technology of Targu Mures, 540142 Targu Mures, Romania; (R.G.M.); (A.S.)
- Department of Clinical Sciences Malmö, Lund University, 21428 Malmö, Sweden
| | - Felicia Antohe
- Department of Proteomics, Institute of Cellular Biology and Pathology “N. Simionescu” of the Romanian Academy, 050568 Bucharest, Romania; (R.M.B.); (V.-I.S.); (E.U.); (L.I.); (A.C.-H.); (M.S.)
- Correspondence: ; Tel.: +40-213-192-737
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17
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Braun JL, Messner HN, Cleverdon REG, Baranowski RW, Hamstra SI, Geromella MS, Stuart JA, Fajardo VA. Heterozygous SOD2 deletion selectively impairs SERCA function in the soleus of female mice. Physiol Rep 2022; 10:e15285. [PMID: 35581738 PMCID: PMC9114654 DOI: 10.14814/phy2.15285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 04/05/2022] [Accepted: 04/08/2022] [Indexed: 06/15/2023] Open
Abstract
The sarco(endo)plasmic reticulum Ca2+ ATPase (SERCA) restores intracellular Ca2+ ([Ca2+ ]i ) to resting levels after muscle contraction, ultimately eliciting relaxation. SERCA pumps are highly susceptible to tyrosine (T)-nitration, impairing their ability to take up Ca2+ resulting in reduced muscle function and increased [Ca2+ ]i and cellular damage. The mitochondrial antioxidant enzyme, superoxide dismutase 2 (SOD2), converts superoxide radicals into less reactive H2 O2 . Heterozygous deletion of SOD2 (Sod2+/- ) in mice increases mitochondrial oxidative stress; however, the consequences of reduced SOD2 expression in skeletal and cardiac muscle, specifically the effect on SERCA pumps, has yet to be investigated. We obtained soleus, extensor digitorum longus (EDL), and left ventricle (LV) muscles from 6 to 7 month-old wild-type (WT) and Sod2+/- female C57BL/6J mice. Ca2+ -dependent SERCA activity assays were performed to assess SERCA function. Western blotting was conducted to examine the protein content of SERCA, phospholamban, and sarcolipin; and immunoprecipitation experiments were done to assess SERCA2a- and SERCA1a-specific T-nitration. Heterozygous SOD2 deletion did not alter SERCA1a or SERCA2a expression in the soleus or LV but reduced SERCA2a in the EDL compared with WT, though this was not statistically significant. Soleus muscles from Sod2+/- mice showed a significant reduction in SERCA's apparent affinity for Ca2+ when compared to WT, corresponding with significantly elevated SERCA2a T-nitration in the soleus. No effect was seen in the EDL or the LV. This is the first study to investigate the effects of SOD2 deficiency on muscle SERCA function and shows that it selectively impairs SERCA function in the soleus.
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Affiliation(s)
- Jessica L. Braun
- Department of KinesiologyBrock UniversitySt. CatharinesOntarioCanada
- Centre for Bone and Muscle HealthBrock UniversitySt. CatharinesOntarioCanada
- Centre for NeuroscienceBrock UniversitySt. CatharinesOntarioCanada
| | - Holt N. Messner
- Department of KinesiologyBrock UniversitySt. CatharinesOntarioCanada
- Centre for Bone and Muscle HealthBrock UniversitySt. CatharinesOntarioCanada
- Department of Biological SciencesBrock UniversitySt. CatharinesOntarioCanada
| | - Riley E. G. Cleverdon
- Department of KinesiologyBrock UniversitySt. CatharinesOntarioCanada
- Centre for Bone and Muscle HealthBrock UniversitySt. CatharinesOntarioCanada
| | - Ryan W. Baranowski
- Department of KinesiologyBrock UniversitySt. CatharinesOntarioCanada
- Centre for Bone and Muscle HealthBrock UniversitySt. CatharinesOntarioCanada
| | - Sophie I. Hamstra
- Department of KinesiologyBrock UniversitySt. CatharinesOntarioCanada
- Centre for Bone and Muscle HealthBrock UniversitySt. CatharinesOntarioCanada
| | - Mia S. Geromella
- Department of KinesiologyBrock UniversitySt. CatharinesOntarioCanada
- Centre for Bone and Muscle HealthBrock UniversitySt. CatharinesOntarioCanada
| | - Jeffrey A. Stuart
- Department of Biological SciencesBrock UniversitySt. CatharinesOntarioCanada
| | - Val A. Fajardo
- Department of KinesiologyBrock UniversitySt. CatharinesOntarioCanada
- Centre for Bone and Muscle HealthBrock UniversitySt. CatharinesOntarioCanada
- Centre for NeuroscienceBrock UniversitySt. CatharinesOntarioCanada
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Effect of oxidative stress on telomere maintenance in aortic smooth muscle cells. Biochim Biophys Acta Mol Basis Dis 2022; 1868:166397. [PMID: 35346819 DOI: 10.1016/j.bbadis.2022.166397] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 03/11/2022] [Accepted: 03/14/2022] [Indexed: 12/12/2022]
Abstract
Reactive oxygen species (ROS) and telomere dysfunction are both associated with aging and the development of age-related diseases. Although there is evidence for a direct relationship between ROS and telomere dysfunction as well as an independent association of oxidative stress and telomere attrition with age-related disorders, there has not been sufficient exploration of how the interaction between oxidative stress and telomere function may contribute to the pathophysiology of cardiovascular diseases (CVD). To better understand the complex relationships between oxidative stress, telomerase biology and pathophysiology, we examined the telomere biology of aortic smooth muscle cells (ASMCs) isolated from mutant mouse models of oxidative stress. We discovered that telomere lengths were significantly shorter in ASMCs isolated from superoxide dismutase 2 heterozygous (Sod2+/-) mice, which exhibit increased arterial stiffness with aging, and the observed telomere attrition occurred over time. Furthermore, the telomere erosion occurred even though telomerase activity increased. In contrast, telomeres remained stable in wild-type and superoxide dismutase 1 heterozygous (Sod1+/-) mice, which do not exhibit CVD phenotypes. The data indicate that mitochondrial oxidative stress, in particular elevated superoxide levels and decreased hydrogen peroxide levels, induces telomere erosion in the ASMCs of the Sod2+/- mice. This reduction in telomere length occurs despite an increase in telomerase activity and correlates with the onset of disease phenotype. Our results suggest that the oxidative stress caused by imbalance in mitochondrial ROS, from deficient SOD2 activity as a model for mitochondrial dysfunction results in telomere dysfunction, which may contribute to pathogenesis of CVD.
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Proteomic analysis reveals rattlesnake venom modulation of proteins associated with cardiac tissue damage in mouse hearts. J Proteomics 2022; 258:104530. [PMID: 35182786 PMCID: PMC9308947 DOI: 10.1016/j.jprot.2022.104530] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 01/19/2022] [Accepted: 02/13/2022] [Indexed: 11/20/2022]
Abstract
Snake envenomation is a common but neglected disease that affects millions of people around the world annually. Among venomous snake species in Brazil, the tropical rattlesnake (Crotalus durissus terrificus) accounts for the highest number of fatal envenomations and is responsible for the second highest number of bites. Snake venoms are complex secretions which, upon injection, trigger diverse physiological effects that can cause significant injury or death. The components of C. d. terrificus venom exhibit neurotoxic, myotoxic, hemotoxic, nephrotoxic, and cardiotoxic properties which present clinically as alteration of central nervous system function, motor paralysis, seizures, eyelid ptosis, ophthalmoplesia, blurred vision, coagulation disorders, rhabdomyolysis, myoglobinuria, and cardiorespiratory arrest. In this study, we focused on proteomic characterization of the cardiotoxic effects of C. d. terrificus venom in mouse models. We injected venom at half the lethal dose (LD50) into the gastrocnemius muscle. Mouse hearts were removed at set time points after venom injection (1 h, 6 h, 12 h, or 24 h) and subjected to trypsin digestion prior to high-resolution mass spectrometry. We analyzed the proteomic profiles of >1300 proteins and observed that several proteins showed noteworthy changes in their quantitative profiles, likely reflecting the toxic activity of venom components. Among the affected proteins were several associated with cellular deregulation and tissue damage. Changes in heart protein abundance offer insights into how they may work synergistically upon envenomation. SIGNIFICANCE: Venom of the tropical rattlesnake (Crotalus durissus terririficus) is known to be neurotoxic, myotoxic, nephrotoxic and cardiotoxic. Although there are several studies describing the biochemical effects of this venom, no work has yet described its proteomic effects in the cardiac tissue of mice. In this work, we describe the changes in several mouse cardiac proteins upon venom treatment. Our data shed new light on the clinical outcome of the envenomation by C. d. terrificus, as well as candidate proteins that could be investigated in efforts to improve current treatment approaches or in the development of novel therapeutic interventions in order to reduce mortality and morbidity resulting from envenomation.
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Exploring the Pattern of Metabolic Alterations Causing Energy Imbalance via PPARα Dysregulation in Cardiac Muscle During Doxorubicin Treatment. Cardiovasc Toxicol 2022; 22:436-461. [PMID: 35157213 DOI: 10.1007/s12012-022-09725-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 02/02/2022] [Indexed: 12/14/2022]
Abstract
Cardiotoxicity by anthracycline antineoplastic drug doxorubicin is one of the systemic toxicity of the cardiovascular system. The mechanism responsible for doxorubicin cardiotoxicity and lipid metabolism remains elusive. The current study tested the hypotheses that the role of peroxisome proliferator-activated receptor α (PPARα) in the progress of doxorubicin-induced cardiomyopathy and its mechanism behind lipid metabolism. In the present study, male rats were subjected to intraperitoneal injection (5-week period) of doxorubicin with different dosages such as low dosage (1.5 mg/kg body weight) and high dosage (15 mg/kg body weight) to induce doxorubicin cardiomyopathy. Myocardial PPARα was impaired in both low dosage and high dosage of doxorubicin-treated rats in a dose-dependent manner. The attenuated level of PPARα impairs the expression of the genes involved in mitochondrial transporter, fatty acid transportation, lipolysis, lipid metabolism, and fatty acid oxidation. Moreover, it disturbs the reverse triacylglycerol transporter apolipoprotein B-100 (APOB) in the myocardium. Doxorubicin elevates the circulatory lipid profile and glucose. Further aggravated lipid profile in circulation impedes the metabolism of lipid in cardiac tissue, which causes a lipotoxic condition in the heart and subsequently associated disease for the period of doxorubicin treatment. Elevated lipids in the circulation translocate into the heart dysregulates lipid metabolism in the heart, which causes augmented oxidative stress and necro-apoptosis and mediates lipotoxic conditions. This finding determines the mechanistic role of doxorubicin-disturbed lipid metabolism via PPARα, which leads to cardiac dysfunction.
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21
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Morciano G, Vitto VAM, Bouhamida E, Giorgi C, Pinton P. Mitochondrial Bioenergetics and Dynamism in the Failing Heart. Life (Basel) 2021; 11:436. [PMID: 34066065 PMCID: PMC8151847 DOI: 10.3390/life11050436] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/07/2021] [Accepted: 05/07/2021] [Indexed: 12/13/2022] Open
Abstract
The heart is responsible for pumping blood, nutrients, and oxygen from its cavities to the whole body through rhythmic and vigorous contractions. Heart function relies on a delicate balance between continuous energy consumption and generation that changes from birth to adulthood and depends on a very efficient oxidative metabolism and the ability to adapt to different conditions. In recent years, mitochondrial dysfunctions were recognized as the hallmark of the onset and development of manifold heart diseases (HDs), including heart failure (HF). HF is a severe condition for which there is currently no cure. In this condition, the failing heart is characterized by a disequilibrium in mitochondrial bioenergetics, which compromises the basal functions and includes the loss of oxygen and substrate availability, an altered metabolism, and inefficient energy production and utilization. This review concisely summarizes the bioenergetics and some other mitochondrial features in the heart with a focus on the features that become impaired in the failing heart.
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Affiliation(s)
- Giampaolo Morciano
- Maria Cecilia Hospital, GVM Care&Research, 48033 Cotignola, Italy
- Laboratory for Technologies of Advanced Therapies (LTTA), Section of Experimental Medicine, Department of Medical Sciences, University of Ferrara, 44121 Ferrara, Italy; (V.A.M.V.); (E.B.); (C.G.)
| | - Veronica Angela Maria Vitto
- Laboratory for Technologies of Advanced Therapies (LTTA), Section of Experimental Medicine, Department of Medical Sciences, University of Ferrara, 44121 Ferrara, Italy; (V.A.M.V.); (E.B.); (C.G.)
| | - Esmaa Bouhamida
- Laboratory for Technologies of Advanced Therapies (LTTA), Section of Experimental Medicine, Department of Medical Sciences, University of Ferrara, 44121 Ferrara, Italy; (V.A.M.V.); (E.B.); (C.G.)
| | - Carlotta Giorgi
- Laboratory for Technologies of Advanced Therapies (LTTA), Section of Experimental Medicine, Department of Medical Sciences, University of Ferrara, 44121 Ferrara, Italy; (V.A.M.V.); (E.B.); (C.G.)
| | - Paolo Pinton
- Maria Cecilia Hospital, GVM Care&Research, 48033 Cotignola, Italy
- Laboratory for Technologies of Advanced Therapies (LTTA), Section of Experimental Medicine, Department of Medical Sciences, University of Ferrara, 44121 Ferrara, Italy; (V.A.M.V.); (E.B.); (C.G.)
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22
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Brand MD. Riding the tiger - physiological and pathological effects of superoxide and hydrogen peroxide generated in the mitochondrial matrix. Crit Rev Biochem Mol Biol 2020; 55:592-661. [PMID: 33148057 DOI: 10.1080/10409238.2020.1828258] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Elevated mitochondrial matrix superoxide and/or hydrogen peroxide concentrations drive a wide range of physiological responses and pathologies. Concentrations of superoxide and hydrogen peroxide in the mitochondrial matrix are set mainly by rates of production, the activities of superoxide dismutase-2 (SOD2) and peroxiredoxin-3 (PRDX3), and by diffusion of hydrogen peroxide to the cytosol. These considerations can be used to generate criteria for assessing whether changes in matrix superoxide or hydrogen peroxide are both necessary and sufficient to drive redox signaling and pathology: is a phenotype affected by suppressing superoxide and hydrogen peroxide production; by manipulating the levels of SOD2, PRDX3 or mitochondria-targeted catalase; and by adding mitochondria-targeted SOD/catalase mimetics or mitochondria-targeted antioxidants? Is the pathology associated with variants in SOD2 and PRDX3 genes? Filtering the large literature on mitochondrial redox signaling using these criteria highlights considerable evidence that mitochondrial superoxide and hydrogen peroxide drive physiological responses involved in cellular stress management, including apoptosis, autophagy, propagation of endoplasmic reticulum stress, cellular senescence, HIF1α signaling, and immune responses. They also affect cell proliferation, migration, differentiation, and the cell cycle. Filtering the huge literature on pathologies highlights strong experimental evidence that 30-40 pathologies may be driven by mitochondrial matrix superoxide or hydrogen peroxide. These can be grouped into overlapping and interacting categories: metabolic, cardiovascular, inflammatory, and neurological diseases; cancer; ischemia/reperfusion injury; aging and its diseases; external insults, and genetic diseases. Understanding the involvement of mitochondrial matrix superoxide and hydrogen peroxide concentrations in these diseases can facilitate the rational development of appropriate therapies.
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23
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Sharma S, Bhattarai S, Ara H, Sun G, St Clair DK, Bhuiyan MS, Kevil C, Watts MN, Dominic P, Shimizu T, McCarthy KJ, Sun H, Panchatcharam M, Miriyala S. SOD2 deficiency in cardiomyocytes defines defective mitochondrial bioenergetics as a cause of lethal dilated cardiomyopathy. Redox Biol 2020; 37:101740. [PMID: 33049519 PMCID: PMC7559509 DOI: 10.1016/j.redox.2020.101740] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/01/2020] [Accepted: 09/23/2020] [Indexed: 12/21/2022] Open
Abstract
Electrophilic aldehyde (4-hydroxynonenal; 4-HNE), formed after lipid peroxidation, is a mediator of mitochondrial dysfunction and implicated in both the pathogenesis and the progression of cardiovascular disease. Manganese superoxide dismutase (MnSOD), a nuclear-encoded antioxidant enzyme, catalyzes the dismutation of superoxide radicals (O2•-) in mitochondria. To study the role of MnSOD in the myocardium, we generated a cardiomyocyte-specific SOD2 (SOD2Δ) deficient mouse strain. Unlike global SOD2 knockout mice, SOD2Δ mice reached adolescence; however, they die at ~4 months of age due to heart failure. Ultrastructural analysis of SOD2Δ hearts revealed altered mitochondrial architecture, with prominent disruption of the cristae and vacuole formation. Noninvasive echocardiographic measurements in SOD2Δ mice showed dilated cardiomyopathic features such as decreased ejection fraction and fractional shortening along with increased left ventricular internal diameter. An increased incidence of ventricular tachycardia was observed during electrophysiological studies of the heart in SOD2Δ mice. Oxidative phosphorylation (OXPHOS) measurement using a Seahorse XF analyzer in SOD2Δ neonatal cardiomyocytes and adult cardiac mitochondria displayed reduced O2 consumption, particularly during basal conditions and after the addition of FCCP (H+ ionophore/uncoupler), compared to that in SOD2fl hearts. Measurement of extracellular acidification (ECAR) to examine glycolysis in these cells showed a pattern precisely opposite that of the oxygen consumption rate (OCR) among SOD2Δ mice compared to their SOD2fl littermates. Analysis of the activity of the electron transport chain complex identified a reduction in Complex I and Complex V activity in SOD2Δ compared to SOD2fl mice. We demonstrated that a deficiency of SOD2 increases reactive oxygen species (ROS), leading to subsequent overproduction of 4-HNE inside mitochondria. Mechanistically, proteins in the mitochondrial respiratory chain complex and TCA cycle (NDUFS2, SDHA, ATP5B, and DLD) were the target of 4-HNE adduction in SOD2Δ hearts. Our findings suggest that the SOD2 mediated 4-HNE signaling nexus may play an important role in cardiomyopathy.
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Affiliation(s)
- Sudha Sharma
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - Susmita Bhattarai
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - Hosne Ara
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - Grace Sun
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - Daret K St Clair
- Department of Toxicology and Cancer Biology, College of Medicine, University of Kentucky, Lexington, KY, USA
| | - Md Shenuarin Bhuiyan
- Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - Christopher Kevil
- Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - Megan N Watts
- Division of Cardiology, Department of Medicine, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - Paari Dominic
- Division of Cardiology, Department of Medicine, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - Takahiko Shimizu
- National Center for Geriatrics and Gerontology, 7-430, Morioka, Obu Aichi, Japan
| | - Kevin J McCarthy
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - Hong Sun
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - Manikandan Panchatcharam
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences Center, Shreveport, LA, USA.
| | - Sumitra Miriyala
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences Center, Shreveport, LA, USA.
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24
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Song JQ, Jiang LY, Fu CP, Wu X, Liu ZL, Xie L, Wu XD, Hao SY, Li SQ. Heterozygous SOD2 deletion deteriorated chronic intermittent hypoxia-induced lung inflammation and vascular remodeling through mtROS-NLRP3 signaling pathway. Acta Pharmacol Sin 2020; 41:1197-1207. [PMID: 32066884 PMCID: PMC7608479 DOI: 10.1038/s41401-019-0349-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 12/12/2019] [Indexed: 12/13/2022] Open
Abstract
Oxidative stress caused by chronic intermittent hypoxia (CIH) is the hallmark of obstructive sleep apnea (OSA). Among the first line of defense against oxidative stress is the dismutation of superoxide radicals, which in the mitochondria is carried out by manganese superoxide dismutase (SOD2). In this study, wild-type (WT) and SOD2-heterozygous knockout (SOD2+/−) mice were exposed to CIH or normoxic (Nor) conditions. After 4 weeks, pulmonary artery pressure was measured, and the mice were processed to harvest either serum for cytokine assays or lungs for flow cytometry and histopathological studies. Herein, we showed that heterozygous deletion of SOD2 markedly deteriorated pulmonary remodeling and increased the oxidative stress, especially promoted the infiltration of macrophages in the lungs of CIH mouse. Moreover, in the intermittent hypoxia (IH)-treated RAW264.7 cells, SOD2 knockdown increased the nucleotide-binding domain-like receptor protein 3 (NLRP3) inflammasome activation accompanied with the IL-1β elevation and caspase-1 activity. Additionally, mitochondrial ROS (mtROS) scavenger mito-TEMPO abolished NLRP3 inflammasome activation in IH-treated RAW264.7 cells. Collectively, our results supported that SOD2 contributed to the pathogenesis of CIH-induced lung remodeling. Meanwhile, SOD2 knockdown exacerbates oxidative damage through assembly and activation of NLRP3 inflammasome in macrophages. SOD2 may be a novel therapeutic target for CIH-induced pulmonary inflammation and arteriole remodeling.
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25
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Kumar V, Santhosh Kumar TR, Kartha CC. Mitochondrial membrane transporters and metabolic switch in heart failure. Heart Fail Rev 2020; 24:255-267. [PMID: 30535838 DOI: 10.1007/s10741-018-9756-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Mitochondrial dysfunction is widely recognized as a major factor for the progression of cardiac failure. Mitochondrial uptake of metabolic substrates and their utilization for ATP synthesis, electron transport chain activity, reactive oxygen species levels, ion homeostasis, mitochondrial biogenesis, and dynamics as well as levels of reactive oxygen species in the mitochondria are key factors which regulate mitochondrial function in the normal heart. Alterations in these functions contribute to adverse outcomes in heart failure. Iron imbalance and oxidative stress are also major factors for the evolution of cardiac hypertrophy, heart failure, and aging-associated pathological changes in the heart. Mitochondrial ATP-binding cassette (ABC) transporters have a key role in regulating iron metabolism and maintenance of redox status in cells. Deficiency of mitochondrial ABC transporters is associated with an impaired mitochondrial electron transport chain complex activity, iron overload, and increased levels of reactive oxygen species, all of which can result in mitochondrial dysfunction. In this review, we discuss the role of mitochondrial ABC transporters in mitochondrial metabolism and metabolic switch, alterations in the functioning of ABC transporters in heart failure, and mitochondrial ABC transporters as possible targets for therapeutic intervention in cardiac failure.
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Affiliation(s)
- Vikas Kumar
- Cardiovascular Diseases and Diabetes Biology group, Rajiv Gandhi Centre for Biotechnology (RGCB), Poojappura, Thycaud Post, Trivandrum, Kerala, 695014, India.,Graduate Studies, Manipal Academy of Higher Education (MAHE), Manipal, Karnataka, India
| | - T R Santhosh Kumar
- Cardiovascular Diseases and Diabetes Biology group, Rajiv Gandhi Centre for Biotechnology (RGCB), Poojappura, Thycaud Post, Trivandrum, Kerala, 695014, India.,Graduate Studies, Manipal Academy of Higher Education (MAHE), Manipal, Karnataka, India.,Cancer Research Program, Rajiv Gandhi Centre for Biotechnology (RGCB), Trivandrum, Kerala, India
| | - C C Kartha
- Cardiovascular Diseases and Diabetes Biology group, Rajiv Gandhi Centre for Biotechnology (RGCB), Poojappura, Thycaud Post, Trivandrum, Kerala, 695014, India.
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26
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Palma FR, He C, Danes JM, Paviani V, Coelho DR, Gantner BN, Bonini MG. Mitochondrial Superoxide Dismutase: What the Established, the Intriguing, and the Novel Reveal About a Key Cellular Redox Switch. Antioxid Redox Signal 2020; 32:701-714. [PMID: 31968997 PMCID: PMC7047081 DOI: 10.1089/ars.2019.7962] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Significance: Reactive oxygen species (ROS) are now widely recognized as central mediators of cell signaling. Mitochondria are major sources of ROS. Recent Advances: It is now clear that mitochondrial ROS are essential to activate responses to cellular microenvironmental stressors. Mediators of these responses reside in large part in the cytosol. Critical Issues: The primary form of ROS produced by mitochondria is the superoxide radical anion. As a charged radical anion, superoxide is restricted in its capacity to diffuse and convey redox messages outside of mitochondria. In addition, superoxide is a reductant and not particularly efficient at oxidizing targets. Because there are many opportunities for superoxide to be neutralized in mitochondria, it is not completely clear how redox cues generated in mitochondria are converted into diffusible signals that produce transient oxidative modifications in the cytosol or nucleus. Future Directions: To efficiently intervene at the level of cellular redox signaling, it seems that understanding how the generation of superoxide radicals in mitochondria is coupled with the propagation of redox messages is essential. We propose that mitochondrial superoxide dismutase (SOD2) is a major system converting diffusion-restricted superoxide radicals derived from the electron transport chain into highly diffusible hydrogen peroxide (H2O2). This enables the coupling of metabolic changes resulting in increased superoxide to the production of H2O2, a diffusible secondary messenger. As such, to determine whether there are other systems coupling metabolic changes to redox messaging in mitochondria as well as how these systems are regulated is essential.
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Affiliation(s)
- Flavio R Palma
- Division of Endocrinology, Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Chenxia He
- Division of Endocrinology, Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Jeanne M Danes
- Division of Endocrinology, Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Veronica Paviani
- Division of Endocrinology, Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Diego R Coelho
- Division of Endocrinology, Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Benjamin N Gantner
- Division of Endocrinology, Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Marcelo G Bonini
- Division of Endocrinology, Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Biophysics, Medical College of Wisconsin, Milwaukee, Wisconsin
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27
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Mitochondrial dysfunction and oxidative stress in heart disease. Exp Mol Med 2019; 51:1-13. [PMID: 31857574 PMCID: PMC6923355 DOI: 10.1038/s12276-019-0355-7] [Citation(s) in RCA: 447] [Impact Index Per Article: 89.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 11/29/2019] [Indexed: 02/06/2023] Open
Abstract
Beyond their role as a cellular powerhouse, mitochondria are emerging as integral players in molecular signaling and cell fate determination through reactive oxygen species (ROS). While ROS production has historically been portrayed as an unregulated process driving oxidative stress and disease pathology, contemporary studies reveal that ROS also facilitate normal physiology. Mitochondria are especially abundant in cardiac tissue; hence, mitochondrial dysregulation and ROS production are thought to contribute significantly to cardiac pathology. Moreover, there is growing appreciation that medical therapies designed to mediate mitochondrial ROS production can be important strategies to ameliorate cardiac disease. In this review, we highlight evidence from animal models that illustrates the strong connections between mitochondrial ROS and cardiac disease, discuss advancements in the development of mitochondria-targeted antioxidant therapies, and identify challenges faced in bringing such therapies into the clinic. Heart disease progression could be tackled by targeting signaling molecules that cause oxidative stress. Jennifer Kwong at Emory University School of Medicine in Atlanta, USA, and co-workers reviewed research into the role of mitochondria and their associated signaling molecules in the development of heart disease. Mitochondria are a major source of reactive oxygen species (ROS), signaling molecules involved in muscle contraction and calcium transfer in the heart, but they also destroy ROS to maintain a balance. Disruption to this balance can lead to elevated ROS, causing DNA and cellular damage, triggering disease. Animal trials using drugs to target mitochondrial ROS show promise in limiting heart disease progression. Further research is needed to determine whether this approach will work in humans and which specific heart problems might benefit from such therapies.
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28
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Liao D, Chen W, Tan CY, Wong JX, Chan PS, Tan LW, Foo R, Jiang J. Upregulation of Yy1 Suppresses Dilated Cardiomyopathy caused by Ttn insufficiency. Sci Rep 2019; 9:16330. [PMID: 31705051 PMCID: PMC6841687 DOI: 10.1038/s41598-019-52796-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 10/21/2019] [Indexed: 12/31/2022] Open
Abstract
Truncating variants in TTN (TTNtv), coding for the largest structural protein in the sarcomere, contribute to the largest portion of familial and ambulatory dilated cardiomyopathy (DCM). TTN haploinsufficiency caused by TTNtv is suggested as the disease mechanism. However, it is unclear whether TTN insufficiency causes DCM. Moreover, it is unknown whether modulation of downstream pathways serves as a therapeutic strategy for DCM caused by TTN insufficiency. Here, we show that reduction of cardiac Ttn expression by adeno-associated virus mediated shRNA (Ttn shRNA) generated DCM in mouse, demonstrating impaired cardiac performance, enlarged left ventricle (LV) and reduced LV wall thickness. A screen of 10 dysregulated and selected genes identified that Yin Yang 1 (Yy1) significantly suppressed DCM caused by Ttn shRNA. Gene profiling by RNAseq showed Yy1 modulated cell growth related genes. Ttn insufficiency activated cardiomyocyte cell cycle reentry by upregulating of Ccnd1 and Ccnd2. Cardiomyocytes activated by Ttn insufficiency did not advance to S phase by EdU incorporation assay. Yy1 promoted cardiomyocyte cell cycle by further enhancing Ccnd1 and Ccnd2 and increasing DNA replication without undergoing cell division. Importantly, upregulation of Ccnd1 and Ccnd2 suppressed DCM caused by Ttn insufficiency. Our findings demonstrate that DCM caused by Ttn insufficiency can be treated by therapeutically promoting cardiac cell cycle.
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Affiliation(s)
- Dan Liao
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore.,Cardiovascular Research Institute, National University Health System, Centre for Translational Medicine, Singapore, 117599, Singapore
| | - Weiming Chen
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore.,Cardiovascular Research Institute, National University Health System, Centre for Translational Medicine, Singapore, 117599, Singapore
| | - Chia Yee Tan
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore.,Cardiovascular Research Institute, National University Health System, Centre for Translational Medicine, Singapore, 117599, Singapore
| | - Jing Xuan Wong
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore.,Cardiovascular Research Institute, National University Health System, Centre for Translational Medicine, Singapore, 117599, Singapore
| | - Pui Shi Chan
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore.,Cardiovascular Research Institute, National University Health System, Centre for Translational Medicine, Singapore, 117599, Singapore
| | - Lek Wen Tan
- Genome Institute of Singapore, A*STAR, Singapore, 138672, Singapore
| | - Roger Foo
- Cardiovascular Research Institute, National University Health System, Centre for Translational Medicine, Singapore, 117599, Singapore.,Genome Institute of Singapore, A*STAR, Singapore, 138672, Singapore
| | - Jianming Jiang
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore. .,Cardiovascular Research Institute, National University Health System, Centre for Translational Medicine, Singapore, 117599, Singapore.
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29
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Elrashidy RA, Kavran M, Asker ME, Mohamed HE, Daneshgari F, Liu G. Smooth muscle-specific deletion of MnSOD exacerbates diabetes-induced bladder dysfunction in mice. Am J Physiol Renal Physiol 2019; 317:F906-F912. [PMID: 31241994 PMCID: PMC6843036 DOI: 10.1152/ajprenal.00221.2019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 06/12/2019] [Accepted: 06/25/2019] [Indexed: 12/17/2022] Open
Abstract
Bladder dysfunction in diabetes progresses gradually over time. However, the mechanisms of the development are not clear. We tested the hypothesis that oxidative stress plays a key role in the development of diabetic bladder dysfunction using an inducible smooth muscle (SM)-specific superoxide dismutase 2 (Sod2) gene knockout (SM-Sod2 KO) mouse model. Eight-week-old male Sod2lox/lox, SM-CreERT2(ki)Cre/+ mice and wild-type mice were assigned to diabetic or control groups. 4-Hydroxytamoxifen was injected into Sod2lox/lox, SM-CreERT2(ki)Cre/+ mice to activate CreERT2-mediated deletion of Sod2. Diabetes was induced by injection of streptozotocin, whereas control mice were injected with vehicle. Nine weeks later, bladder function was evaluated, and bladders were harvested for immunoblot analysis. Wild-type diabetic mice presented compensated bladder function along with increased nitrotyrosine and MnSOD in detrusor muscle. Induction of diabetes in SM-Sod2 KO mice caused deteriorated bladder function and even greater increases in nitrotyrosine compared with wild-type diabetic mice. Expression levels of apoptosis regulator Bax and cleaved caspase-3 were increased, but apoptosis regulator Bcl-2 expression was decreased in detrusor muscle of both diabetic groups, with more pronounced effects in SM-Sod2 KO diabetic mice. Our findings demonstrate that exaggerated oxidative stress can accelerate the development of bladder dysfunction in diabetic mice and the enhanced activation of apoptotic pathways in the bladder may be involved in the process.
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Affiliation(s)
- Rania A Elrashidy
- Department of Surgery, MetroHealth Medical Center, Case Western Reserve University, Cleveland, Ohio
- Department of Biochemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Michael Kavran
- Department of Radiology, Case Western Reserve University, Cleveland, Ohio
| | - Mervat E Asker
- Department of Biochemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Hoda E Mohamed
- Department of Biochemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Firouz Daneshgari
- Department of Surgery, MetroHealth Medical Center, Case Western Reserve University, Cleveland, Ohio
| | - Guiming Liu
- Department of Surgery, MetroHealth Medical Center, Case Western Reserve University, Cleveland, Ohio
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30
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Qian S, Qian Y, Huo D, Wang S, Qian Q. Tanshinone IIa protects retinal endothelial cells against mitochondrial fission induced by methylglyoxal through glyoxalase 1. Eur J Pharmacol 2019; 857:172419. [PMID: 31136758 DOI: 10.1016/j.ejphar.2019.172419] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Revised: 05/24/2019] [Accepted: 05/24/2019] [Indexed: 02/06/2023]
Abstract
Advanced glycation end products (AGEs) play an important role in the onset of diabetic retinopathy. Therefore, in the current study, we investigate whether and how Tanshinone IIa (Tan IIa) from Salvia miltiorrhiza protects bovine retinal endothelial cells (BRECs) against methylglyoxal (MGO) mediated cell dysfunction. The results showed that MGO reduced cell viability in dose dependent manner. The treatment of Tan IIa (50 μM) significantly improved cell viability induced by MGO in BRECs. MGO increased cellular reactive oxygen species formation and cellular nitric oxide (NO) level; enhanced nox1 and iNOS mRNA levels; inhibited prdx1 mRNA level. The treatment of Tan IIa effectually ameliorated cellular oxidative stress. Exposure of MGO resulted in mitochondrial fission and decrease of opa1 and mfn1. No significant difference in mRNA levels of mfn2 and drp1 was detected between MGO and medium. Tan IIa reduced mitochondrial fragmentation, enhanced the mRNA levels of mfn1 and opa1 in MGO cultured BRECs. The short time exposure of cellular antioxidatants, dimethylthiourea (10 mM) and tiron (10 mM) had no effect on mitochondrial fission although they ameliorated cellular reactive oxygen species level. Moreover, overexpression of glyoxalase 1 (GLO1) increased key proteins of mitochondrial fusion, including opa1 and mfn1 in BRECs cultured with MGO. However, inhibition of GLO1 by siRNA abolished the effect of Tan IIa on induction of mitochondrial fusion in MGO cultured BRECs. In conclusion, MGO caused the injury of retinal endothelial cells through induction of mitochondrial dysfunction and mitochondrial fission, the treatment of Tan IIa ameliorated mitochondrial dysfunction and fission induced by AGEs through enhancing GLO1.
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Affiliation(s)
- Shuhong Qian
- Department of Clinical Laboratory, 1st Affiliated Hospital, Zhengzhou University, China
| | - Yujin Qian
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Australia
| | - Dongxia Huo
- College of Material Engineering, Zhengzhou University, China
| | - Shijin Wang
- Department of Clinical Laboratory, 1st Affiliated Hospital, Zhengzhou University, China
| | - Qingwen Qian
- Department of Internal Medicine, 1st Affiliated Hospital, Zhengzhou University, China.
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31
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Sun Q, Wu X, Wang H, Chen W, Zhao X, Yang Y, Chen W. Protective Effects Of Astragalus Polysaccharides On Oxidative Stress In High Glucose-Induced Or SOD2-Silenced H9C2 Cells Based On PCR Array Analysis. Diabetes Metab Syndr Obes 2019; 12:2209-2220. [PMID: 31695464 PMCID: PMC6821059 DOI: 10.2147/dmso.s228351] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 09/27/2019] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Oxidative stress in cardiac myocytes is an important pathogenesis of diabetic cardiomyopathy (DCM). Previously, we reported that astragalus polysaccharide (APS) has protective effects against the oxidative stress of DCM. This study aimed to determine the effect of APS on the oxidative stress induced by hyperglycemia in H9C2 cells. METHODS Rat H9C2 cells were cultured in vitro and randomly divided into the control group, HG group, APS-HG group, siRNASOD2 group, and APS-siRNASOD2 group. The cellular ultrastructure was measured by transmission electron microscopy. Cell apoptosis was examined by TUNEL staining. Levels of reactive oxygen species (ROS) were detected by a quantitative fluorescence assay (DHE). 8-OH-dG and nitrotyrosine, the indicators of oxidative stress injury, were detected by immunohistochemistry. A PCR array was used to evaluate the expression levels of 84 oxidative stress genes in cultured cells, and the PCR array results were partially verified by Western blot. RESULTS APS treatment protected the H9C2 cell ultrastructure, reduced the level of cell apoptosis, inhibited cellular ROS production, and reduced the levels of oxidative stress injury indicators 8-OH-dG and nitrotyrosine in high glucose-induced or SOD2-silenced H9C2 cells. It also altered oxidative stress-related genes at the mRNA and protein levels. CONCLUSION APS may improve antioxidant capacity and inhibit oxidative stress injury in high glucose induced H9C2 cells.
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Affiliation(s)
- Qilin Sun
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai200040, People’s Republic of China
| | - Xiaoyan Wu
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai200040, People’s Republic of China
| | - Hao Wang
- Experimental Teaching Center of Basic Medicine, Fudan University, Shanghai200032, People’s Republic of China
| | - Wenjie Chen
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai200040, People’s Republic of China
| | - Xuelan Zhao
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai200040, People’s Republic of China
| | - Yehong Yang
- Department of Endocrinology, Huashan Hospital, Fudan University, Shanghai200040, People’s Republic of China
- Yehong Yang Department of Endocrinology, Huashan Hospital, Fudan University, No.12 Wu-lu-mu-qi Road, Shanghai200040, People’s Republic of ChinaTel +86 21 5288999 Email
| | - Wei Chen
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai200040, People’s Republic of China
- Correspondence: Wei Chen Department of Geriatrics, Huashan Hospital, Fudan University, No.12 Wu-lu-mu-qi Road, Shanghai200040, People’s Republic of ChinaTel +86 21 5288999 ext 7190 Email
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32
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Md Fuzi AA, Omar SZ, Mohamed Z, Mat Adenan NA, Mokhtar NM. High throughput silencing identifies novel genes in endometrioid endometrial cancer. Taiwan J Obstet Gynecol 2018; 57:217-226. [PMID: 29673664 DOI: 10.1016/j.tjog.2018.02.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/17/2017] [Indexed: 01/18/2023] Open
Abstract
OBJECTIVE To validate the gene expression profile obtained from the previous microarray analysis and to further study the biological functions of these genes in endometrial cancer. From our previous study, we identified 621 differentially expressed genes in laser-captured microdissected endometrioid endometrial cancer as compared to normal endometrial cells. Among these genes, 146 were significantly up-regulated in endometrial cancer. MATERIALS AND METHODS A total of 20 genes were selected from the list of up-regulated genes for the validation assay. The qPCR confirmed that 19 out of the 20 genes were up-regulated in endometrial cancer compared with normal endometrium. RNA interference (RNAi) was used to knockdown the expression of the upregulated genes in ECC-1 and HEC-1A endometrial cancer cell lines and its effect on proliferation, migration and invasion were examined. RESULTS Knockdown of MIF, SOD2, HIF1A and SLC7A5 by RNAi significantly decreased the proliferation of ECC-1 cells (p < 0.05). Our results also showed that the knockdown of MIF, SOD2 and SLC7A5 by RNAi significantly decreased the proliferation and migration abilities of HEC-1A cells (p < 0.05). Moreover, the knockdown of SLC38A1 and HIF1A by RNAi resulted in a significant decrease in the proliferation of HEC1A cells (p < 0.05). CONCLUSION We have identified the biological roles of SLC38A1, MIF, SOD2, HIF1A and SLC7A5 in endometrial cancer, which opens up the possibility of using the RNAi silencing approach to design therapeutic strategies for treatment of endometrial cancer.
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Affiliation(s)
- Afiqah Alyaa Md Fuzi
- Department of Pharmacology, Faculty of Medicine, University Malaya, 50603 Kuala Lumpur, Malaysia
| | - Siti Zawiah Omar
- Department of Obstetrics and Gynecology, Faculty of Medicine, University Malaya, 50603 Kuala Lumpur, Malaysia
| | - Zahurin Mohamed
- Department of Pharmacology, Faculty of Medicine, University Malaya, 50603 Kuala Lumpur, Malaysia
| | - Noor Azmi Mat Adenan
- Department of Obstetrics and Gynecology, Faculty of Medicine, University Malaya, 50603 Kuala Lumpur, Malaysia
| | - Norfilza Mohd Mokhtar
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia Medical Centre, 56000 Cheras, Kuala Lumpur, Malaysia.
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Awad MA, Aldosari SR, Abid MR. Genetic Alterations in Oxidant and Anti-Oxidant Enzymes in the Vascular System. Front Cardiovasc Med 2018; 5:107. [PMID: 30140678 PMCID: PMC6095034 DOI: 10.3389/fcvm.2018.00107] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 07/16/2018] [Indexed: 12/26/2022] Open
Abstract
Cardiovascular diseases (CVD) are one of the prime causes of mortality worldwide. Experimental animal models have become a valuable tool to investigate and further advance our knowledge on etiology, pathophysiology and intervention. They also provide a great opportunity to understand the contribution of different genes and effector molecules in the pathogenesis and development of diseases at the sub-cellular levels. High levels of reactive oxygen species (ROS) have been associated with the progression of CVD such as ischemic heart disease (IHD), myocardial infarction, hypertension, atherosclerosis, aortic aneurysm, aortic dissection and others. On the contrary, low levels of antioxidants were associated with exacerbated cardiovascular event. Major focus of this review is on vascular pathogenesis that leads to CVD, with special emphasis on the roles of oxidant/antioxidant enzymes in health and disease progression in vascular cells including vascular endothelium. The major oxidant enzymes that have been implicated with the progression of CVD include NADPH Oxidase, nitric oxide synthase, monoamine oxidase, and xanthine oxidoreductase. The major antioxidant enzymes that have been attributed to normalizing the levels of oxidative stress include superoxide dismutases, catalase and glutathione peroxidases (GPx), and thioredoxin. Cardiovascular phenotypes of major oxidants and antioxidants knockout and transgenic animal models are discussed here.
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Affiliation(s)
- Maan A Awad
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Brown University Alpert Medical School, Providence, RI, United States
| | - Sarah R Aldosari
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Brown University Alpert Medical School, Providence, RI, United States
| | - M Ruhul Abid
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Brown University Alpert Medical School, Providence, RI, United States
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Liu AJ, Li B, Yang M, Liu Y, Liu YL, Su JW. Sirtuin 1 Mediates Hydrogen Sulfide-induced Cytoprotection Effects in Neonatal Mouse Cardiomyocytes. Chin Med J (Engl) 2018; 130:2346-2353. [PMID: 28937042 PMCID: PMC5634087 DOI: 10.4103/0366-6999.215328] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Background: Current knowledge indicates that oxidative damage and the following inflammation is pivotal pathway for myocardial cell death. In recent decades, hydrogen sulfide (H2S) has been identified as a novel endogenous vasodilator and neuromodulator due to its antioxidation capacity. However, whether H2S pretreatment in neonatal mouse cardiomyocytes is a protection effect against oxidative stress remains elusive. Methods: Primary neonatal mouse cardiomyocytes were isolated and cultured, subsequently, pretreated with the H2S donor, sodium hydrosulfide (NaHS). Cell viability, lactate dehydrogenase (LDH) release, and reactive oxygen species (ROS) production are evaluated. The levels of superoxide dismutase (Sod2) and Sirtuin 1 (Sirt1), a deacetylation enzyme, were detected by Western blotting. The statistics was performed using independent-sample t-test. Results: NaHS (100 μmol/L) had no toxicity to primary neonatal mouse cardiomyocytes. Furthermore, NaHS pretreatment significantly improved neonatal mouse cardiomyocytes survival after H2O2-induced cell death, indicated by the decrease in LDH release (40.00 ± 2.65% vs. 65.33 ± 4.33%, P < 0.01) and ROS production (1.90 ± 0.33 vs. 4.56 ± 0.56, P < 0.05), and that the salubrious effect was accompanied by the upregulation of Sod2 expression. In addition, the study showed that NaHS pretreatment improved mitochondrial DNA number in neonatal mouse cardiomyocyte. Furthermore, the result demonstrated NaHS increased the expression of Sirt1 in neonatal mouse cardiomyocyte. Ex 527, an inhibitor of Sirt1, could attenuate these effects of NaHS-induced Sod2 expression and mtDNA number increase, furthermore, abrogate the cytoprotective effects of NaHS for neonatal mouse cardiomyocytes. Conclusion: Sirt1 mediated H2S-induced cytoprotection effects in neonatal mouse cardiomyocytes.
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Affiliation(s)
- Ai-Jun Liu
- Department of Pediatric Cardiac Surgery Center, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Bin Li
- Department of Pediatric Cardiac Surgery Center, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Ming Yang
- Department of Pediatric Cardiac Surgery Center, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Yang Liu
- Department of Pediatric Cardiac Surgery Center, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Ying-Long Liu
- Department of Pediatric Cardiac Surgery Center, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Jun-Wu Su
- Department of Pediatric Cardiac Surgery Center, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
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Chen W, Ju J, Yang Y, Wang H, Chen W, Zhao X, Ye H, Zhang Y. Astragalus polysaccharides protect cardiac stem and progenitor cells by the inhibition of oxidative stress-mediated apoptosis in diabetic hearts. DRUG DESIGN DEVELOPMENT AND THERAPY 2018; 12:943-954. [PMID: 29719380 PMCID: PMC5916262 DOI: 10.2147/dddt.s155686] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Introduction Diabetic cardiomyopathy is characterized by an imbalance between myocyte death and regeneration mediated by the progressive loss of cardiac stem and progenitor cells (CSPCs) by apoptosis and necrosis due to the activation of oxidative stress with diabetes. In this study, we evaluated the beneficial effect of astragalus polysaccharides (APS) therapy on the protection of CSPCs through its antioxidative capacity in diabetic hearts. Materials and methods Streptozotocin (STZ)-induced diabetic mice and heterozygous (SOD2+/−) knockout mice were employed and administered with APS. Ventricular CSPCs were isolated for oxidative evaluation. The abundance, apoptosis and proliferation, reactive oxygen species (ROS) formation, oxidative damage, and SOD2 protein levels and activities were evaluated in ventricular CSPCs. Results We confirmed that APS increased the CSPC abundance, reduced the apoptosis of CSPCs, and enhanced the proliferation of CSPCs in both STZ-induced diabetic mice and nondiabetic SOD2+/− mice. In addition, therapy of APS enhanced SOD2 protein levels and enzyme activities, and inhibited ROS formation and oxidative damage of CSPCs from both STZ-induced diabetic mice and nondiabetic SOD2+/− mice. Conclusion Our findings demonstrated the positive effect of APS on the rescue of CSPC preservation in diabetes, dependent on the inhibition of oxidative stress-mediated apoptosis.
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Affiliation(s)
- Wei Chen
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai, China
| | - Jing Ju
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai, China
| | - Yehong Yang
- Department of Endocrinology, Huashan Hospital, Fudan University, Shanghai, China
| | - Hao Wang
- Core Center of Animal Facility, School of Medicine, Fudan University, Shanghai, China
| | - Wenjie Chen
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai, China
| | - Xuelan Zhao
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai, China
| | - Hongying Ye
- Department of Endocrinology, Huashan Hospital, Fudan University, Shanghai, China
| | - Yu Zhang
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai, China
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Wang Y, Branicky R, Noë A, Hekimi S. Superoxide dismutases: Dual roles in controlling ROS damage and regulating ROS signaling. J Cell Biol 2018; 217:1915-1928. [PMID: 29669742 PMCID: PMC5987716 DOI: 10.1083/jcb.201708007] [Citation(s) in RCA: 981] [Impact Index Per Article: 163.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 03/13/2018] [Accepted: 04/04/2018] [Indexed: 02/07/2023] Open
Abstract
Wang et al. review the dual role of superoxide dismutases in controlling reactive oxygen species (ROS) damage and regulating ROS signaling across model systems as well as their involvement in human diseases. Superoxide dismutases (SODs) are universal enzymes of organisms that live in the presence of oxygen. They catalyze the conversion of superoxide into oxygen and hydrogen peroxide. Superoxide anions are the intended product of dedicated signaling enzymes as well as the byproduct of several metabolic processes including mitochondrial respiration. Through their activity, SOD enzymes control the levels of a variety of reactive oxygen species (ROS) and reactive nitrogen species, thus both limiting the potential toxicity of these molecules and controlling broad aspects of cellular life that are regulated by their signaling functions. All aerobic organisms have multiple SOD proteins targeted to different cellular and subcellular locations, reflecting the slow diffusion and multiple sources of their substrate superoxide. This compartmentalization also points to the need for fine local control of ROS signaling and to the possibility for ROS to signal between compartments. In this review, we discuss studies in model organisms and humans, which reveal the dual roles of SOD enzymes in controlling damage and regulating signaling.
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Affiliation(s)
- Ying Wang
- Department of Biology, McGill University, Montreal, Canada
| | - Robyn Branicky
- Department of Biology, McGill University, Montreal, Canada
| | - Alycia Noë
- Department of Biology, McGill University, Montreal, Canada
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Girerd S, Tosca L, Herault O, Vignon C, Biard D, Aggoune D, Dkhissi F, Bonnet ML, Sorel N, Desterke C, Bennaceur-Griscelli A, Tachdjian G, Guilhot F, Guilhot J, Chomel JC, Turhan AG. Superoxide dismutase 2 (SOD2) contributes to genetic stability of native and T315I-mutated BCR-ABL expressing leukemic cells. Biochem Biophys Res Commun 2018; 498:715-722. [DOI: 10.1016/j.bbrc.2018.03.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 03/05/2018] [Indexed: 01/12/2023]
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Chen W, Sun Q, Ju J, Chen W, Zhao X, Zhang Y, Yang Y. Astragalus polysaccharides inhibit oxidation in high glucose-challenged or SOD2-silenced H9C2 cells. Diabetes Metab Syndr Obes 2018; 11:673-681. [PMID: 30425545 PMCID: PMC6204861 DOI: 10.2147/dmso.s177269] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
INTRODUCTION Oxidative stress plays an important role in the development of diabetic cardio-myopathy (DCM). Previously, we reported that Astragalus polysaccharides (APS) improved DCM by inhibition of cardiac oxidative stress. In this study, we evaluated the beneficial effect of APS on high glucose-induced oxidative stress in cardiomyocytes in vitro. MATERIALS AND METHODS H9C2 cells were cultured in the presence of high concentration of glucose or transfected with siRNASOD2, followed by APS treatment. The cellular mitochondrial ultrastructure was observed using a transmission electron microscope. Cell apoptosis was detected using hairpin oligonucleotide probes and quantified by flow cytometry analysis. Superoxide production was determined by immunohistochemistry using the fluorescent dye dihydroethidium (DHE). Nitrotyrosine and 8-OH-dG antibodies were employed to detect oxidative damage to cytoplasmic proteins and oxidative stress in the nuclei, respectively. Superoxide dismutase (SOD) activity was measured utilizing the SOD Assay Kit, and SOD protein levels were analyzed by Western blotting. RESULTS APS treatment protected cellular mitochondrial ultrastructure, reduced cell apoptosis (hairpin-1), inhibited cellular superoxide production (DHE), and reduced oxidative damage to cytoplasmic proteins (nitrotyrosine) and oxidative stress in the nuclei (8-OH-dG) in high glucose-induced and/or SOD2-silenced H9C2 cells, together with induction of SOD2 enzyme activity and increase of protein levels. CONCLUSION Our findings indicated the beneficial effect of APS on high glucose-challenged H9C2 cells, which was associated with inhibition of oxidative stress in vitro.
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Affiliation(s)
- Wei Chen
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai 200040, China,
| | - Qilin Sun
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai 200040, China,
| | - Jing Ju
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai 200040, China,
| | - Wenjie Chen
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai 200040, China,
| | - Xuelan Zhao
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai 200040, China,
| | - Yu Zhang
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai 200040, China,
| | - Yehong Yang
- Department of Endocrinology, Huashan Hospital, Fudan University, Shanghai 200040, China,
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Bradley JM, Li Z, Organ CL, Polhemus DJ, Otsuka H, Islam KN, Bhushan S, Gorodnya OM, Ruchko MV, Gillespie MN, Wilson GL, Lefer DJ. A novel mtDNA repair fusion protein attenuates maladaptive remodeling and preserves cardiac function in heart failure. Am J Physiol Heart Circ Physiol 2017; 314:H311-H321. [PMID: 29101177 DOI: 10.1152/ajpheart.00515.2017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Oxidative stress results in mtDNA damage and contributes to myocardial cell death. mtDNA repair enzymes are crucial for mtDNA repair and cell survival. We investigated a novel, mitochondria-targeted fusion protein (Exscien1-III) containing endonuclease III in myocardial ischemia-reperfusion injury and transverse aortic constriction (TAC)-induced heart failure. Male C57/BL6J mice (10-12 wk) were subjected to 45 min of myocardial ischemia and either 24 h or 4 wk of reperfusion. Exscien1-III (4 mg/kg ip) or vehicle was administered at the time of reperfusion. Male C57/BL6J mice were subjected to TAC, and Exscien1-III (4 mg/kg i.p) or vehicle was administered daily starting at 3 wk post-TAC and continued for 12 wk. Echocardiography was performed to assess left ventricular (LV) structure and function. Exscien1-III reduced myocardial infarct size ( P < 0.01) at 24 h of reperfusion and preserved LV ejection fraction at 4 wk postmyocardial ischemia. Exscien1-III attenuated TAC-induced LV dilation and dysfunction at 6-12 wk post-TAC ( P < 0.05). Exscien1-III reduced ( P < 0.05) cardiac hypertrophy and maladaptive remodeling after TAC. Assessment of cardiac mitochondria showed that Exscien1-III localized to mitochondria and increased mitochondrial antioxidant and reduced apoptotic markers. In conclusion, our results indicate that administration of Exscien1-III provides significant protection against myocardial ischemia and preserves myocardial structure and LV performance in the setting of heart failure. NEW & NOTEWORTHY Oxidative stress-induced mitochondrial DNA damage is a prominent feature in the pathogenesis of cardiovascular diseases. In the present study, we demonstrate the efficacy of a novel, mitochondria-targeted fusion protein that traffics endonuclease III specifically for mitochondrial DNA repair in two well-characterized murine models of cardiac injury and failure.
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Affiliation(s)
- Jessica M Bradley
- Cardiovascular Center of Excellence and Department of Pharmacology, Louisiana State University Health Sciences Center , New Orleans, Louisiana
| | - Zhen Li
- Cardiovascular Center of Excellence and Department of Pharmacology, Louisiana State University Health Sciences Center , New Orleans, Louisiana
| | - Chelsea L Organ
- Cardiovascular Center of Excellence and Department of Pharmacology, Louisiana State University Health Sciences Center , New Orleans, Louisiana
| | - David J Polhemus
- Cardiovascular Center of Excellence and Department of Pharmacology, Louisiana State University Health Sciences Center , New Orleans, Louisiana
| | - Hiroyuki Otsuka
- Cardiovascular Center of Excellence and Department of Pharmacology, Louisiana State University Health Sciences Center , New Orleans, Louisiana
| | - Kazi N Islam
- Department of Surgery, Louisiana State University Health Sciences Center , New Orleans, Louisiana
| | - Shashi Bhushan
- Cardiovascular Center of Excellence and Department of Pharmacology, Louisiana State University Health Sciences Center , New Orleans, Louisiana
| | - Olena M Gorodnya
- College of Medicine, University of South Alabama , Mobile, Alabama
| | | | - Mark N Gillespie
- College of Medicine, University of South Alabama , Mobile, Alabama
| | - Glenn L Wilson
- College of Medicine, University of South Alabama , Mobile, Alabama.,Exscien Corporation , Mobile, Alabama
| | - David J Lefer
- Cardiovascular Center of Excellence and Department of Pharmacology, Louisiana State University Health Sciences Center , New Orleans, Louisiana
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Li Q, Yu Q, Na R, Liu B. Omega-3 polyunsaturated fatty acids prevent murine dilated cardiomyopathy by reducing oxidative stress and cardiomyocyte apoptosis. Exp Ther Med 2017; 14:6152-6158. [PMID: 29285172 DOI: 10.3892/etm.2017.5338] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 03/24/2017] [Indexed: 01/19/2023] Open
Abstract
Mice that lacked manganese-superoxide dismutase (Mn-SOD) activity exhibited the typical pathology of dilated cardiomyopathy (DCM). The aim of the present study was to investigate the effect of supplementation with omega-3 polyunsaturated fatty acids (n-3 PUFA) on heart function and oxidative stress biomarkers in mice with DCM. In the present study, heart/muscle-specific Mn-SOD-deficient mice (H/M-Sod2-/-) were treated with n-3 PUFA (30 mg/kg/day) for 10 weeks, and the reactive oxygen species (ROS) production in their heart mitochondria and cardiac function was subsequently assessed. n-3 PUFA treatment diminished ROS production and suppressed the progression of cardiac dysfunction. Furthermore, n-3 PUFA treatment effectively reversed the cardiac dysfunction and dilatation observed in symptomatic H/M-Sod2-/- mice. Notably, n-3 PUFA treatment ameliorated a molecular defect in connexin 43. Hematoxylin-eosin staining indicated that the phenotype of DCM was also ameliorated following n-3 PUFA treatment. Furthermore, echocardiography demonstrated that cardiac function was significantly improved in the mice treated with n-3 PUFA (P<0.05). Meanwhile, pre-treatment with n-3 PUFA significantly decreased cardiomyocyte apoptosis (P<0.001). In conclusion, n-3 PUFA treatment is able to prevent murine DCM, primarily by reducing ROS production and improving myocardial apoptosis. Therefore, the impairment of ROS production is proposed as a potential therapy for DCM.
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Affiliation(s)
- Qianxiao Li
- Department of Cardiology, Zhejiang Province Hospital of Integrated Traditional Chinese and Western Medicine, Hangzhou, Zhejiang 310003, P.R. China
| | - Qin Yu
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning 116000, P.R. China
| | - Rongmei Na
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning 116000, P.R. China
| | - Baiting Liu
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning 116000, P.R. China
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Scicchitano BM, Pelosi L, Sica G, Musarò A. The physiopathologic role of oxidative stress in skeletal muscle. Mech Ageing Dev 2017; 170:37-44. [PMID: 28851603 DOI: 10.1016/j.mad.2017.08.009] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 07/14/2017] [Accepted: 08/18/2017] [Indexed: 12/16/2022]
Abstract
Muscle senescence is a complex mechanism that is usually associated with a decrease in mass, strength and velocity of contraction. This state, known as sarcopenia, is a multifactorial process and it may be the consequence of several events, including accumulation of oxidative stress. The role of oxidative stress in the physiopathology of skeletal muscle is quite complex. Transiently increased levels of oxidative stress might reflect a potentially health promoting process, while an uncontrolled accumulation might have pathological implication. The physiopathological role of oxidative stress on skeletal muscle, its involvement in aging-induced sarcopenia, and potential countermeasures will be discussed.
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Affiliation(s)
- Bianca Maria Scicchitano
- Institute of Histology and Embryology, School of Medicine, Catholic University of the Sacred Heart, Rome, Italy.
| | - Laura Pelosi
- DAHFMO-Unit of Histology and Medical Embryology, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia - Fondazione Cenci Bolognetti, Italy
| | - Gigliola Sica
- Institute of Histology and Embryology, School of Medicine, Catholic University of the Sacred Heart, Rome, Italy
| | - Antonio Musarò
- DAHFMO-Unit of Histology and Medical Embryology, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia - Fondazione Cenci Bolognetti, Italy; Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, Italy.
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Fidler TP, Rowley JW, Araujo C, Boudreau LH, Marti A, Souvenir R, Dale K, Boilard E, Weyrich AS, Abel ED. Superoxide Dismutase 2 is dispensable for platelet function. Thromb Haemost 2017; 117:1859-1867. [PMID: 28771279 DOI: 10.1160/th17-03-0174] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Accepted: 06/11/2017] [Indexed: 12/20/2022]
Abstract
Increased intracellular reactive oxygen species (ROS) promote platelet activation. The sources of platelet-derived ROS are diverse and whether or not mitochondrial derived ROS, modulates platelet function is incompletely understood. Studies of platelets from patients with sickle cell disease, and diabetes suggest a correlation between mitochondrial ROS and platelet dysfunction. Therefore, we generated mice with a platelet specific knockout of superoxide dismutase 2 (SOD2-KO) to determine if increased mitochondrial ROS increases platelet activation. SOD2-KO platelets demonstrated decreased SOD2 activity and increased mitochondrial ROS, however total platelet ROS was unchanged. Mitochondrial function and content were maintained in non-stimulated platelets. However SOD2-KO platelets demonstrated decreased mitochondrial function following thrombin stimulation. In vitro platelet activation and spreading was normal and in vivo, deletion of SOD2 did not change tail-bleeding or arterial thrombosis indices. In pathophysiological models mediated by platelet-dependent immune mechanisms such as sepsis and autoimmune inflammatory arthritis, SOD2-KO mice were phenotypically identical to wildtype controls. These data demonstrate that increased mitochondrial ROS does not result in platelet dysfunction.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - E Dale Abel
- E. Dale Abel, MB.BS., DPhil., Fraternal Order of Eagles Diabetes Research Center, Division of Endocrinology and Metabolism, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, 4312 PBDB, 169 Newton Road, Iowa City, IA 52242-1101, USA, Tel.: +1 (319) 353 3050, Fax: +1 (319) 335 3865, E-mail:
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Ju J, Chen W, Lai Y, Wang L, Wang H, Chen WJ, Zhao X, Ye H, Li Y, Zhang Y. Astragalus polysaccharides improve cardiomyopathy in STZ-induced diabetic mice and heterozygous (SOD2+/-) knockout mice. ACTA ACUST UNITED AC 2017; 50:e6204. [PMID: 28700033 PMCID: PMC5505521 DOI: 10.1590/1414-431x20176204] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 05/05/2017] [Indexed: 12/16/2022]
Abstract
Oxidative stress plays an important role in the development of diabetic cardiomyopathy. In the present study, we determined whether the effect of astragalus polysaccharides (APS) on diabetic cardiomyopathy was associated with its impact on oxidative stress. Streptozotocin (STZ)-induced diabetic mice and heterozygous superoxide dismutase (SOD2+/-) knockout mice were administered APS. The hemodynamics, cardiac ultrastructure, and the apoptosis, necrosis and proliferation of cardiomyocytes were assessed to evaluate the effect of APS on diabetic and oxidative cardiomyopathy. Furthermore, H2O2 formation, oxidative stress/damage, and SOD activity in cardiomyocytes were evaluated to determine the effects of APS on cardiac oxidative stress. APS therapy improved hemodynamics and myocardial ultrastructure with reduced apoptosis/necrosis, and enhanced proliferation in cardiomyocytes from both STZ-induced diabetic mice and heterozygous SOD2+/- knockout mice. In addition, APS therapy reduced H2O2 formation and oxidative stress/damage, and enhanced SOD activity in both groups of mice. Our findings suggest that APS had benefits in diabetic cardiomyopathy, which may be partly associated with its impact on cardiac oxidative stress.
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Affiliation(s)
- J Ju
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai, China
| | - W Chen
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai, China
| | - Y Lai
- Department of Endocrinology, Huashan Hospital, Fudan University, Shanghai, China
| | - L Wang
- Core Center of Clinical Skill Training, Shanghai Medical College, Fudan University, Shanghai, China
| | - H Wang
- Experimental Center of Basic Medicine, Shanghai Medical College, Fudan University, Shanghai, China
| | - W J Chen
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai, China
| | - X Zhao
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai, China
| | - H Ye
- Department of Endocrinology, Huashan Hospital, Fudan University, Shanghai, China
| | - Y Li
- Department of Endocrinology, Huashan Hospital, Fudan University, Shanghai, China
| | - Y Zhang
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai, China
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Hu J, Li H, Luo X, Li Y, Bode A, Cao Y. The role of oxidative stress in EBV lytic reactivation, radioresistance and the potential preventive and therapeutic implications. Int J Cancer 2017; 141:1722-1729. [PMID: 28571118 DOI: 10.1002/ijc.30816] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 05/26/2017] [Indexed: 12/23/2022]
Affiliation(s)
- Jianmin Hu
- Key Laboratory of Cancer Carcinogenesis and Invasion, Chinese Ministry of Education; Xiangya Hospital, Central South University; Changsha China
- Cancer Research Institute, Xiangya School of Medicine, Central South University; Changsha China
- Key Laboratory of Carcinogenesis; Chinese Ministry of Health; Changsha China
| | - Hongde Li
- Key Laboratory of Cancer Carcinogenesis and Invasion, Chinese Ministry of Education; Xiangya Hospital, Central South University; Changsha China
- Cancer Research Institute, Xiangya School of Medicine, Central South University; Changsha China
- Key Laboratory of Carcinogenesis; Chinese Ministry of Health; Changsha China
| | - Xiangjian Luo
- Key Laboratory of Cancer Carcinogenesis and Invasion, Chinese Ministry of Education; Xiangya Hospital, Central South University; Changsha China
- Cancer Research Institute, Xiangya School of Medicine, Central South University; Changsha China
- Key Laboratory of Carcinogenesis; Chinese Ministry of Health; Changsha China
| | - Yueshuo Li
- Key Laboratory of Cancer Carcinogenesis and Invasion, Chinese Ministry of Education; Xiangya Hospital, Central South University; Changsha China
- Cancer Research Institute, Xiangya School of Medicine, Central South University; Changsha China
- Key Laboratory of Carcinogenesis; Chinese Ministry of Health; Changsha China
| | - Ann Bode
- The Hormel Institute, University of Minnesota; Austin MN 55912
| | - Ya Cao
- Key Laboratory of Cancer Carcinogenesis and Invasion, Chinese Ministry of Education; Xiangya Hospital, Central South University; Changsha China
- Cancer Research Institute, Xiangya School of Medicine, Central South University; Changsha China
- Key Laboratory of Carcinogenesis; Chinese Ministry of Health; Changsha China
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45
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Moringa oleifera Seeds Attenuate Vascular Oxidative and Nitrosative Stresses in Spontaneously Hypertensive Rats. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:4129459. [PMID: 28713487 PMCID: PMC5496124 DOI: 10.1155/2017/4129459] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 05/03/2017] [Indexed: 02/07/2023]
Abstract
Moringa oleifera (MOI) is a tree currently used in traditional medicine in tropical Africa, America, and Asia for therapeutic applications in several disorders including arterial hypertension. We previously described a cardiac protective role of a treatment with MOI seeds in spontaneously hypertensive rats (SHR). Here, we investigated the effects of this treatment on oxidative and nitrosative vascular stresses in SHR, with normotensive Wistar Kyoto rats used as controls. Oxidative and nitrosative stresses detected in SHR aortas using the fluorescent dye dihydroethidine and protein nitrotyrosine staining were reduced in MOI-treated SHR aortas. This was associated with a decrease of free 8-isoprostane circulating level, vascular p22phox and p47phox expressions, and SOD2 upregulation. Moreover, circulating nitrites and C-reactive protein, increased in SHR, were both reduced in SHR receiving MOI. This was associated to decrease iNOS and NF-κB protein expressions after MOI treatment. In functional studies, the endothelium-dependent carbachol-induced relaxation was improved in MOI-treated SHR resistance arteries. Oral administration of MOI seeds demonstrates vascular antioxidant, anti-inflammatory, and endothelial protective effects in SHR. Our data support the use of MOI seeds in diet against cardiovascular disorders associated with oxidative stress and inflammation such as hypertension, scientifically validating the use of these seeds in Malagasy traditional medicine.
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46
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Pohjoismäki JL, Goffart S. The role of mitochondria in cardiac development and protection. Free Radic Biol Med 2017; 106:345-354. [PMID: 28216385 DOI: 10.1016/j.freeradbiomed.2017.02.032] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 01/27/2017] [Accepted: 02/14/2017] [Indexed: 12/31/2022]
Abstract
Mitochondria are essential for the development as well as maintenance of the myocardium, the most energy consuming tissue in the human body. Mitochondria are not only a source of ATP energy but also generators of reactive oxygen species (ROS), that cause oxidative damage, but also regulate physiological processes such as the switch from hyperplastic to hypertrophic growth after birth. As excess ROS production and oxidative damage are associated with cardiac pathology, it is not surprising that much of the research focused on the deleterious aspects of free radicals. However, cardiomyocytes are naturally highly adapted against repeating oxidative insults, with evidence suggesting that moderate and acute ROS exposure has beneficial consequences for mitochondrial maintenance and cardiac health. Antioxidant defenses, mitochondrial quality control, mtDNA maintenance mechanisms as well as mitochondrial fusion and fission improve mitochondrial function and cardiomyocyte survival under stress conditions. As these adaptive processes can be induced, promoting mitohormesis or mitochondrial biogenesis using controlled ROS exposure could provide a promising strategy to increase cardiomyocyte survival and prevent pathological remodeling of the myocardium.
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Affiliation(s)
- Jaakko L Pohjoismäki
- University of Eastern Finland, Department of Environmental and Biological Sciences, P.O. Box 111, 80101 Joensuu, Finland.
| | - Steffi Goffart
- University of Eastern Finland, Department of Environmental and Biological Sciences, P.O. Box 111, 80101 Joensuu, Finland
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47
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de Carvalho MDC, De Mesquita JF, Eleutherio ECA. In Vivo Characterization of I91T Sod2 Polymorphism of Saccharomyces cerevisiae. J Cell Biochem 2017; 118:1078-1086. [DOI: 10.1002/jcb.25720] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 08/30/2016] [Indexed: 11/09/2022]
Affiliation(s)
| | - Joelma Freire De Mesquita
- Department of Genetics and Molecular Biology; Federal University of the State of Rio de Janeiro (UNIRIO); Rio de Janeiro 22290-240 Brazil
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48
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Moringa oleiferaSeeds Attenuate Vascular Oxidative and Nitrosative Stresses in Spontaneously Hypertensive Rats. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017. [DOI: 10.1155/2017%2f4129459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Moringa oleifera(MOI) is a tree currently used in traditional medicine in tropical Africa, America, and Asia for therapeutic applications in several disorders including arterial hypertension. We previously described a cardiac protective role of a treatment with MOI seeds in spontaneously hypertensive rats (SHR). Here, we investigated the effects of this treatment on oxidative and nitrosative vascular stresses in SHR, with normotensive Wistar Kyoto rats used as controls. Oxidative and nitrosative stresses detected in SHR aortas using the fluorescent dye dihydroethidine and protein nitrotyrosine staining were reduced in MOI-treated SHR aortas. This was associated with a decrease of free 8-isoprostane circulating level, vascular p22phoxand p47phoxexpressions, and SOD2 upregulation. Moreover, circulating nitrites and C-reactive protein, increased in SHR, were both reduced in SHR receiving MOI. This was associated to decrease iNOS and NF-κB protein expressions after MOI treatment. In functional studies, the endothelium-dependent carbachol-induced relaxation was improved in MOI-treated SHR resistance arteries. Oral administration of MOI seeds demonstrates vascular antioxidant, anti-inflammatory, and endothelial protective effects in SHR. Our data support the use of MOI seeds in diet against cardiovascular disorders associated with oxidative stress and inflammation such as hypertension, scientifically validating the use of these seeds in Malagasy traditional medicine.
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49
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Berger MM, Jia XY, Legay V, Aymard M, Tilles JG, Lina B. Nutrition- and Virus-Induced Stress Represses the Expression of Manganese Superoxide Dismutase in Vitro. Exp Biol Med (Maywood) 2016; 229:843-9. [PMID: 15337840 DOI: 10.1177/153537020422900818] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The relationship between oxidative stress and neuronal cell death has been suggested for many years. To understand the influence of oxidative stress on neuronal cell death, we investigated the influence of oxidative stress on DEV cells, a human glial cell line. Using enterovirus infection and/or malnutrition to induce oxidative stress, our results demonstrate that those stressors severely influence the antioxidant defense system in DEV cells. Although the expression of mitochondrial manganese superoxide dismutase (MnSOD) in DEV cells was significantly increased in acute infection with viral and nutritional stress, in persistent infection and nutritional stress, the expression of the MnSOD was drastically downregulated. We believe that this downregulation of MnSOD expression in the chronic stress model is due to repression of antioxidant defense. The downregulation of the MnSOD expression may lead to an increase of free-radical production and thus explain why the cells in the chronic stress model were more vulnerable to other oxidative stress influences. The vulnerability of DEV cells to additional stress factors resulted in progressive cell death, which may be analogous to the cell death in neurodegenerative diseases.
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Affiliation(s)
- Martina M Berger
- Department of Medicine, University of California, Irvine, Orange, California 92868, USA.
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50
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Ma L, Chou JW, Snipes JA, Bharadwaj MS, Craddock AL, Cheng D, Weckerle A, Petrovic S, Hicks PJ, Hemal AK, Hawkins GA, Miller LD, Molina AJA, Langefeld CD, Murea M, Parks JS, Freedman BI. APOL1 Renal-Risk Variants Induce Mitochondrial Dysfunction. J Am Soc Nephrol 2016; 28:1093-1105. [PMID: 27821631 DOI: 10.1681/asn.2016050567] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 08/12/2016] [Indexed: 11/03/2022] Open
Abstract
APOL1 G1 and G2 variants facilitate kidney disease in blacks. To elucidate the pathways whereby these variants contribute to disease pathogenesis, we established HEK293 cell lines stably expressing doxycycline-inducible (Tet-on) reference APOL1 G0 or the G1 and G2 renal-risk variants, and used Illumina human HT-12 v4 arrays and Affymetrix HTA 2.0 arrays to generate global gene expression data with doxycycline induction. Significantly altered pathways identified through bioinformatics analyses involved mitochondrial function; results from immunoblotting, immunofluorescence, and functional assays validated these findings. Overexpression of APOL1 by doxycycline induction in HEK293 Tet-on G1 and G2 cells led to impaired mitochondrial function, with markedly reduced maximum respiration rate, reserve respiration capacity, and mitochondrial membrane potential. Impaired mitochondrial function occurred before intracellular potassium depletion or reduced cell viability occurred. Analysis of global gene expression profiles in nondiseased primary proximal tubule cells from black patients revealed that the nicotinate phosphoribosyltransferase gene, responsible for NAD biosynthesis, was among the top downregulated transcripts in cells with two APOL1 renal-risk variants compared with those without renal-risk variants; nicotinate phosphoribosyltransferase also displayed gene expression patterns linked to mitochondrial dysfunction in HEK293 Tet-on APOL1 cell pathway analyses. These results suggest a pivotal role for mitochondrial dysfunction in APOL1-associated kidney disease.
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Affiliation(s)
- Lijun Ma
- Department of Internal Medicine, Section on Nephrology, .,Center for Public Health Genomics
| | - Jeff W Chou
- Center for Public Health Genomics.,Division of Public Health Sciences, Department of Biostatistical Sciences
| | | | - Manish S Bharadwaj
- Department of Internal Medicine, Section on Gerontology and Geriatric Medicine
| | | | - Dongmei Cheng
- Department of Internal Medicine, Section on Molecular Medicine
| | | | | | | | | | | | | | - Anthony J A Molina
- Department of Internal Medicine, Section on Gerontology and Geriatric Medicine
| | - Carl D Langefeld
- Center for Public Health Genomics.,Division of Public Health Sciences, Department of Biostatistical Sciences
| | - Mariana Murea
- Department of Internal Medicine, Section on Nephrology
| | - John S Parks
- Department of Internal Medicine, Section on Molecular Medicine
| | - Barry I Freedman
- Department of Internal Medicine, Section on Nephrology, .,Center for Public Health Genomics.,Center for Diabetes Research, Wake Forest School of Medicine, Winston-Salem, North Carolina
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