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Spyropoulos F, Michel T. D-Amino acid oxidase-derived chemogenetic oxidative stress: Unraveling the multi-omic responses to in vivo redox stress. Curr Opin Chem Biol 2024; 79:102438. [PMID: 38417321 PMCID: PMC10957096 DOI: 10.1016/j.cbpa.2024.102438] [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: 12/06/2023] [Revised: 02/11/2024] [Accepted: 02/12/2024] [Indexed: 03/01/2024]
Abstract
Chemogenetic approaches have been developed to define the mechanisms whereby the intracellular oxidant hydrogen peroxide (H2O2) modulates both physiological and pathological responses. Recombinant yeast D-amino acid oxidase (DAAO) can be exploited to modulate H₂O₂ in target cells and tissues. In vitro studies using cultured cells expressing recombinant DAAO have provided critical new information on the intracellular transport and metabolism of H2O2 with great temporal and spatial resolution. In contrast, in vivo studies using chemogenetic/transgenic animal models have explored the pathological effects of chronically elevated H2O2 in tissues. Coupled with transcriptomic, proteomic, and metabolomic methods, in vivo chemogenetic approaches are providing new insights into the adaptations to oxidative stress. This review of chemogenetic applications focuses on new models of heart failure and neurodegeneration that leverage in vivo chemogenetic modulation of oxidative stress in target tissues to identify new therapeutic targets.
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Affiliation(s)
- Fotios Spyropoulos
- Department of Pediatric Newborn Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, 02115, USA.
| | - Thomas Michel
- Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 02115, USA.
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2
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Karagianni C, Bazopoulou D. Redox regulation in lifespan determination. J Biol Chem 2024; 300:105761. [PMID: 38367668 PMCID: PMC10965828 DOI: 10.1016/j.jbc.2024.105761] [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: 07/28/2023] [Revised: 02/07/2024] [Accepted: 02/11/2024] [Indexed: 02/19/2024] Open
Abstract
One of the major challenges that remain in the fields of aging and lifespan determination concerns the precise roles that reactive oxygen species (ROS) play in these processes. ROS, including superoxide and hydrogen peroxide, are constantly generated as byproducts of aerobic metabolism, as well as in response to endogenous and exogenous cues. While ROS accumulation and oxidative damage were long considered to constitute some of the main causes of age-associated decline, more recent studies reveal a signaling role in the aging process. In fact, accumulation of ROS, in a spatiotemporal manner, can trigger beneficial cellular responses that promote longevity and healthy aging. In this review, we discuss the importance of timing and compartmentalization of external and internal ROS perturbations in organismal lifespan and the role of redox regulated pathways.
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Yadav S, Waldeck-Weiermair M, Spyropoulos F, Bronson R, Pandey AK, Das AA, Sisti AC, Covington TA, Thulabandu V, Caplan S, Chutkow W, Steinhorn B, Michel T. Sensory ataxia and cardiac hypertrophy caused by neurovascular oxidative stress in chemogenetic transgenic mouse lines. Nat Commun 2023; 14:3094. [PMID: 37248315 PMCID: PMC10227029 DOI: 10.1038/s41467-023-38961-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 05/24/2023] [Indexed: 05/31/2023] Open
Abstract
Oxidative stress is associated with cardiovascular and neurodegenerative diseases. Here we report studies of neurovascular oxidative stress in chemogenetic transgenic mouse lines expressing yeast D-amino acid oxidase (DAAO) in neurons and vascular endothelium. When these transgenic mice are fed D-amino acids, DAAO generates hydrogen peroxide in target tissues. DAAO-TGCdh5 transgenic mice express DAAO under control of the putatively endothelial-specific Cdh5 promoter. When we provide these mice with D-alanine, they rapidly develop sensory ataxia caused by oxidative stress and mitochondrial dysfunction in neurons within dorsal root ganglia and nodose ganglia innervating the heart. DAAO-TGCdh5 mice also develop cardiac hypertrophy after chronic chemogenetic oxidative stress. This combination of ataxia, mitochondrial dysfunction, and cardiac hypertrophy is similar to findings in patients with Friedreich's ataxia. Our observations indicate that neurovascular oxidative stress is sufficient to cause sensory ataxia and cardiac hypertrophy. Studies of DAAO-TGCdh5 mice could provide mechanistic insights into Friedreich's ataxia.
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Affiliation(s)
- Shambhu Yadav
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Markus Waldeck-Weiermair
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Fotios Spyropoulos
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
- Department of Pediatric Newborn Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Roderick Bronson
- Department of Immunology, Harvard Medical School, Boston, MA, 02115, USA
| | - Arvind K Pandey
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Apabrita Ayan Das
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Alexander C Sisti
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Taylor A Covington
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Venkata Thulabandu
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Shari Caplan
- Novartis Institutes for Biomedical Research, Cambridge, MA, 02139, USA
| | - William Chutkow
- Novartis Institutes for Biomedical Research, Cambridge, MA, 02139, USA
| | - Benjamin Steinhorn
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Thomas Michel
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA.
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Sharifi S, Böger M, Lortz S, Mehmeti I. Luminal H 2 O 2 promotes ER Ca 2+ dysregulation and toxicity of palmitate in insulin-secreting INS-1E cells. FASEB J 2023; 37:e22685. [PMID: 36468845 DOI: 10.1096/fj.202201237r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 11/07/2022] [Accepted: 11/21/2022] [Indexed: 12/12/2022]
Abstract
The endoplasmic reticulum (ER) lumen is not only the major site for the assembly and folding of newly synthesized proteins but also the main intracellular Ca2+ store. Ca2+ ions are involved in versatile biochemical processes, including posttranslational processing and folding of nascent proteins. Disruption of ER Ca2+ homeostasis is usually accompanied by an ER stress response that can ultimately lead to apoptosis if unresolved. Abnormal ER Ca2+ depletion has been linked to pancreatic β-cell dysfunction and death under lipotoxic conditions. However, the underlying mechanisms how the β-cell toxic saturated free fatty acid palmitate perturbs ER Ca2+ homeostasis and its interplay with other organelles are not fully understood. In the present study, we demonstrate that treatment of insulin-secreting INS-1E cells with palmitate diminished ER Ca2+ levels, elevated cytosolic/mitochondrial Ca2+ content, lowered the mitochondrial membrane potential, and ATP content. In addition, palmitate-pretreated β-cells contained significantly less luminal Ca2+ , revealed a severely impaired ER Ca2+ reuptake rate, and substantially lower insulin content. Importantly, detoxification of luminal H2 O2 by expression of the ER-resident glutathione peroxidase 8 (GPx8) abrogated the lipotoxic effects of palmitate. Moreover, GPx8 supported oxidative protein folding and preserved insulin content under lipotoxic conditions. A direct involvement of luminal H2 O2 in palmitate-mediated ER Ca2+ depletion could be corroborated by the ectopic expression of an ER-luminal active catalase. Our data point to the critical role of luminal H2 O2 in palmitate-mediated depletion of ER Ca2+ through redox-dependent impairment of Ca2+ ATPase pump activity upstream of mitochondrial dysfunction in insulin-secreting INS-1E cells.
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Affiliation(s)
- Sarah Sharifi
- Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany
| | - Maren Böger
- Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany
| | - Stephan Lortz
- Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany
| | - Ilir Mehmeti
- Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany
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Waldeck-Weiermair M, Yadav S, Kaynert J, Thulabandu VR, Pandey AK, Spyropoulos F, Covington T, Das AA, Krüger C, Michel T. Differential endothelial hydrogen peroxide signaling via Nox isoforms: Critical roles for Rac1 and modulation by statins. Redox Biol 2022; 58:102539. [PMID: 36401888 PMCID: PMC9673117 DOI: 10.1016/j.redox.2022.102539] [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: 10/14/2022] [Revised: 11/08/2022] [Accepted: 11/10/2022] [Indexed: 11/16/2022] Open
Abstract
Statins have manifold protective effects on the cardiovascular system. In addition to lowering LDL cholesterol levels, statins also have antioxidant effects on cardiovascular tissues involving intracellular redox pathways that are incompletely understood. Inhibition of HMG-CoA reductase by statins not only modulates cholesterol synthesis, but also blocks the synthesis of lipids necessary for the post-translational modification of signaling proteins, including the GTPase Rac1. Here we studied the mechanisms whereby Rac1 and statins modulate the intracellular oxidant hydrogen peroxide (H2O2) via NADPH oxidase (Nox) isoforms. In live-cell imaging experiments using the H2O2 biosensor HyPer7, we observed robust H2O2 generation in human umbilical vein endothelial cells (HUVEC) following activation of cell surface receptors for histamine or vascular endothelial growth factor (VEGF). Both VEGF- and histamine-stimulated H2O2 responses were abrogated by siRNA-mediated knockdown of Rac1. VEGF responses required the Nox isoforms Nox2 and Nox4, while histamine-stimulated H2O2 signals are independent of Nox4 but still required Nox2. Endothelial H2O2 responses to both histamine and VEGF were completely inhibited by simvastatin. In resting endothelial cells, Rac1 is targeted to the cell membrane and cytoplasm, but simvastatin treatment promotes translocation of Rac1 to the cell nucleus. The effects of simvastatin both on receptor-dependent H2O2 production and Rac1 translocation are rescued by treatment of cells with mevalonic acid, which is the enzymatic product of the HMG-CoA reductase that is inhibited by statins. Taken together, these studies establish that receptor-modulated H2O2 responses to histamine and VEGF involve distinct Nox isoforms, both of which are completely dependent on Rac1 prenylation.
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Affiliation(s)
- Markus Waldeck-Weiermair
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Shambhu Yadav
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Jonas Kaynert
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | | | - Arvind K Pandey
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Fotios Spyropoulos
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Pediatric Newborn Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Taylor Covington
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Apabrita Ayan Das
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Christina Krüger
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Thomas Michel
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
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Pandey AK, Waldeck-Weiermair M, Wells QS, Xiao W, Yadav S, Eroglu E, Michel T, Loscalzo J. Expression of CD70 Modulates NO and Redox Status in Endothelial Cells. Arterioscler Thromb Vasc Biol 2022; 42:1169-1185. [PMID: 35924558 PMCID: PMC9394499 DOI: 10.1161/atvbaha.122.317866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Endothelial dysfunction is a critical component in the pathogenesis of cardiovascular diseases and is closely associated with NO levels and oxidative stress. Here, we report on novel findings linking endothelial expression of CD70 with alterations in NO and reactive oxygen species. METHODS CD70 expression was genetically manipulated in human aortic and pulmonary artery endothelial cells. Intracellular NO and hydrogen peroxide (H2O2) were measured using genetically encoded biosensors, and cellular phenotypes were assessed. RESULTS An unbiased phenome-wide association study demonstrated that polymorphisms in CD70 associate with vascular phenotypes. Endothelial cells treated with CD70-directed short-interfering RNA demonstrated impaired wound closure, decreased agonist-stimulated NO levels, and reduced eNOS (endothelial nitric oxide synthase) protein. This was accompanied by reduced NO bioactivity, increased 3-nitrotyrosine levels, and a decrease in the eNOS binding partner heat shock protein 90. Following treatment with the thioredoxin inhibitor auranofin or with agonist histamine, intracellular H2O2 levels increased up to 80% in the cytosol, plasmalemmal caveolae, and mitochondria. There was increased expression of NADPH oxidase 1 complex and gp91phox; expression of copper/zinc and manganese superoxide dismutases was also elevated. CD70 knockdown reduced levels of the H2O2 scavenger catalase; by contrast, glutathione peroxidase 1 expression and activity were increased. CD70 overexpression enhanced endothelial wound closure, increased NO levels, and attenuated the reduction in eNOS mRNA induced by TNFα. CONCLUSIONS Taken together, these data establish CD70 as a novel regulatory protein in endothelial NO and reactive oxygen species homeostasis, with implications for human vascular disease.
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Affiliation(s)
- Arvind K Pandey
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (A.K.P., M.W.-W., W.X., S.Y., T.M., J.L.)
| | - Markus Waldeck-Weiermair
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (A.K.P., M.W.-W., W.X., S.Y., T.M., J.L.)
| | - Quinn S Wells
- Division of Cardiovascular Medicine, Department of Medicine, Vanderbilt University, Nashville, TN (Q.S.W.)
| | - Wusheng Xiao
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (A.K.P., M.W.-W., W.X., S.Y., T.M., J.L.)
| | - Shambhu Yadav
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (A.K.P., M.W.-W., W.X., S.Y., T.M., J.L.)
| | - Emrah Eroglu
- Faculty for Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey (E.E.)
| | - Thomas Michel
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (A.K.P., M.W.-W., W.X., S.Y., T.M., J.L.)
| | - Joseph Loscalzo
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (A.K.P., M.W.-W., W.X., S.Y., T.M., J.L.)
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Eroglu E, Graier WF, Malli R. The preamble to the free radical biology and medicine virtual special issue on "Targeting genetic biosensors to intracellular signaling pathways". Free Radic Biol Med 2022; 187:202-203. [PMID: 35679986 DOI: 10.1016/j.freeradbiomed.2022.05.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Emrah Eroglu
- Molecular Biology, Genetics and Bioengineering Program, Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey; Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, Turkey
| | - Wolfgang F Graier
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, 8010, Graz, Austria; BioTechMed Graz, Mozartgasse 12/II, 8010, Graz, Austria
| | - Roland Malli
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, 8010, Graz, Austria; BioTechMed Graz, Mozartgasse 12/II, 8010, Graz, Austria.
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Sies H, Belousov VV, Chandel NS, Davies MJ, Jones DP, Mann GE, Murphy MP, Yamamoto M, Winterbourn C. Defining roles of specific reactive oxygen species (ROS) in cell biology and physiology. Nat Rev Mol Cell Biol 2022; 23:499-515. [PMID: 35190722 DOI: 10.1038/s41580-022-00456-z] [Citation(s) in RCA: 478] [Impact Index Per Article: 239.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/18/2022] [Indexed: 02/06/2023]
Abstract
'Reactive oxygen species' (ROS) is a generic term that defines a wide variety of oxidant molecules with vastly different properties and biological functions that range from signalling to causing cell damage. Consequently, the description of oxidants needs to be chemically precise to translate research on their biological effects into therapeutic benefit in redox medicine. This Expert Recommendation article pinpoints key issues associated with identifying the physiological roles of oxidants, focusing on H2O2 and O2.-. The generic term ROS should not be used to describe specific molecular agents. We also advocate for greater precision in measurement of H2O2, O2.- and other oxidants, along with more specific identification of their signalling targets. Future work should also consider inter-organellar communication and the interactions of redox-sensitive signalling targets within organs and whole organisms, including the contribution of environmental exposures. To achieve these goals, development of tools that enable site-specific and real-time detection and quantification of individual oxidants in cells and model organisms are needed. We also stress that physiological O2 levels should be maintained in cell culture to better mimic in vivo redox reactions associated with specific cell types. Use of precise definitions and analytical tools will help harmonize research among the many scientific disciplines working on the common goal of understanding redox biology.
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Affiliation(s)
- Helmut Sies
- Institute for Biochemistry and Molecular Biology I, Faculty of Medicine, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany.
- Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany.
| | - Vsevolod V Belousov
- Federal Center of Brain Research and Neurotechnologies, Federal Medical Biological Agency, Moscow, Russia
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, Moscow, Russia
| | - Navdeep S Chandel
- Division of Pulmonary & Critical Care Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Michael J Davies
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark
| | - Dean P Jones
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University, Atlanta, GA, USA
| | - Giovanni E Mann
- King's British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine and Sciences, King's College London, London, UK
| | - Michael P Murphy
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, UK
| | - Masayuki Yamamoto
- Department of Medical Biochemistry, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Christine Winterbourn
- Department of Pathology and Biomedical Science, University of Otago, Christchurch, New Zealand
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Wang X, Tian X, Zhao K, Wu L, Cao J, Shen S. Oxygen-independent Free Radicals Induced by Photothermal Effect of Fe 3O 4 for Hypoxic Cancer Therapy. CHEM LETT 2022. [DOI: 10.1246/cl.220091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xiaofeng Wang
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu 212013, P. R. China
- Affiliated Hospital of Jiangsu University, Zhenjiang 212001, P. R. China
| | - Xiangrong Tian
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu 212013, P. R. China
- Affiliated Hospital of Jiangsu University, Zhenjiang 212001, P. R. China
| | - Kai Zhao
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu 212013, P. R. China
- Affiliated Hospital of Jiangsu University, Zhenjiang 212001, P. R. China
| | - Lin Wu
- Affiliated Hospital of Jiangsu University, Zhenjiang 212001, P. R. China
| | - Jin Cao
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu 212013, P. R. China
| | - Song Shen
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu 212013, P. R. China
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Spyropoulos F, Sorrentino A, van der Reest J, Yang P, Waldeck-Weiermair M, Steinhorn B, Eroglu E, Saeedi Saravi SS, Yu P, Haigis M, Christou H, Michel T. Metabolomic and transcriptomic signatures of chemogenetic heart failure. Am J Physiol Heart Circ Physiol 2022; 322:H451-H465. [PMID: 35089810 PMCID: PMC8896991 DOI: 10.1152/ajpheart.00628.2021] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The failing heart is characterized by elevated levels of reactive oxygen species. We have developed an animal model of heart failure induced by chemogenetic production of oxidative stress in the heart using a recombinant adeno-associated virus (AAV9) expressing yeast d-amino acid oxidase (DAAO) targeted to cardiac myocytes. When DAAO-infected animals are fed the DAAO substrate d-alanine, the enzyme generates hydrogen peroxide (H2O2) in the cardiac myocytes, leading to dilated cardiomyopathy. However, the underlying mechanisms of oxidative stress-induced heart failure remain incompletely understood. Therefore, we investigated the effects of chronic oxidative stress on the cardiac transcriptome and metabolome. Rats infected with recombinant cardiotropic AAV9 expressing DAAO or control AAV9 were treated for 7 wk with d-alanine to stimulate chemogenetic H2O2 production by DAAO and generate dilated cardiomyopathy. After hemodynamic assessment, left and right ventricular tissues were processed for RNA sequencing and metabolomic profiling. DAAO-induced dilated cardiomyopathy was characterized by marked changes in the cardiac transcriptome and metabolome both in the left and right ventricle. Downregulated transcripts are related to energy metabolism and mitochondrial function, accompanied by striking alterations in metabolites involved in cardiac energetics, redox homeostasis, and amino acid metabolism. Upregulated transcripts are involved in cytoskeletal organization and extracellular matrix. Finally, we noted increased metabolite levels of antioxidants glutathione and ascorbate. These findings provide evidence that chemogenetic generation of oxidative stress leads to a robust heart failure model with distinct transcriptomic and metabolomic signatures and set the basis for understanding the underlying pathophysiology of chronic oxidative stress in the heart.NEW & NOTEWORTHY We have developed a "chemogenetic" heart failure animal model that recapitulates a central feature of human heart failure: increased cardiac redox stress. We used a recombinant DAAO enzyme to generate H2O2 in cardiomyocytes, leading to cardiomyopathy. Here we report striking changes in the cardiac metabolome and transcriptome following chemogenetic heart failure, similar to changes observed in human heart failure. Our findings help validate chemogenetic approaches for the discovery of novel therapeutic targets in heart failure.
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Affiliation(s)
- Fotios Spyropoulos
- 1Department of Pediatric Newborn Medicine, Brigham and
Women’s Hospital, Harvard Medical School, Boston, Massachusetts,2Cardiovascular Division, Department of Medicine, Brigham
and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | - Andrea Sorrentino
- 2Cardiovascular Division, Department of Medicine, Brigham
and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | | | - Peiran Yang
- 2Cardiovascular Division, Department of Medicine, Brigham
and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | - Markus Waldeck-Weiermair
- 2Cardiovascular Division, Department of Medicine, Brigham
and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | - Benjamin Steinhorn
- 2Cardiovascular Division, Department of Medicine, Brigham
and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | - Emrah Eroglu
- 2Cardiovascular Division, Department of Medicine, Brigham
and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | - Seyed Soheil Saeedi Saravi
- 2Cardiovascular Division, Department of Medicine, Brigham
and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | - Paul Yu
- 2Cardiovascular Division, Department of Medicine, Brigham
and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | - Marcia Haigis
- 3Department of Cell Biology, Harvard Medical School, Boston, Massachusetts
| | - Helen Christou
- 1Department of Pediatric Newborn Medicine, Brigham and
Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | - Thomas Michel
- 2Cardiovascular Division, Department of Medicine, Brigham
and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
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11
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Chemogenetic approaches to dissect the role of H2O2 in redox-dependent pathways using genetically encoded biosensors. Biochem Soc Trans 2022; 50:335-345. [PMID: 35015078 DOI: 10.1042/bst20210506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/20/2021] [Accepted: 12/21/2021] [Indexed: 11/17/2022]
Abstract
Chemogenetic tools are recombinant enzymes that can be targeted to specific organelles and tissues. The provision or removal of the enzyme substrate permits control of its biochemical activities. Yeast-derived enzyme D-amino acid oxidase (DAAO) represents the first of its kind for a substrate-based chemogenetic approach to modulate H2O2 concentrations within cells. Combining these powerful enzymes with multiparametric imaging methods exploiting genetically encoded biosensors has opened new lines of investigations in life sciences. In recent years, the chemogenetic DAAO approach has proven beneficial to establish a new role for (patho)physiological oxidative stress on redox-dependent signaling and metabolic pathways in cultured cells and animal model systems. This mini-review covers established or emerging methods and assesses newer approaches exploiting chemogenetic tools combined with genetically encoded biosensors.
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