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Tomczyk MM, Cheung KG, Xiang B, Tamanna N, Fonseca Teixeira AL, Agarwal P, Kereliuk SM, Spicer V, Lin L, Treberg J, Tong Q, Dolinsky VW. Mitochondrial Sirtuin-3 (SIRT3) Prevents Doxorubicin-Induced Dilated Cardiomyopathy by Modulating Protein Acetylation and Oxidative Stress. Circ Heart Fail 2022; 15:e008547. [PMID: 35418250 PMCID: PMC9117478 DOI: 10.1161/circheartfailure.121.008547] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND High doses of doxorubicin put cancer patients at risk for developing dilated cardiomyopathy. Previously, we showed that doxorubicin treatment decreases SIRT3 (sirtuin 3), the main mitochondrial deacetylase and increases protein acetylation in rat cardiomyocytes. Here, we hypothesize that SIRT3 expression can attenuate doxorubicin induced dilated cardiomyopathy in vivo by preventing the acetylation of mitochondrial proteins. METHODS Nontransgenic, M3-SIRT3 (truncated SIRT3; short isoform), and M1-SIRT3 (full-length SIRT3; mitochondrial localized) transgenic mice were treated with doxorubicin for 4 weeks (8 mg/kg body weight per week). Echocardiography was performed to assess cardiac structure and function and validated by immunohistochemistry and immunofluorescence (n=4-10). Mass spectrometry was performed on cardiac mitochondrial peptides in saline (n=6) and doxorubicin (n=5) treated hearts. Validation was performed in doxorubicin treated primary rat and human induced stem cell derived cardiomyocytes transduced with adenoviruses for M3-SIRT3 and M1-SIRT3 and deacetylase deficient mutants (n=4-10). RESULTS Echocardiography revealed that M3-SIRT3 transgenic mice were partially resistant to doxorubicin induced changes to cardiac structure and function whereas M1-SIRT3 expression prevented cardiac remodeling and dysfunction. In doxorubicin hearts, 37 unique acetylation sites on mitochondrial proteins were altered. Pathway analysis revealed these proteins are involved in energy production, fatty acid metabolism, and oxidative stress resistance. Increased M1-SIRT3 expression in primary rat and human cardiomyocytes attenuated doxorubicin-induced superoxide formation, whereas deacetylase deficient mutants were unable to prevent oxidative stress. CONCLUSIONS Doxorubicin reduced SIRT3 expression and markedly affected the cardiac mitochondrial acetylome. Increased M1-SIRT3 expression in vivo prevented doxorubicin-induced cardiac dysfunction, suggesting that SIRT3 could be a potential therapeutic target for mitigating doxorubicin-induced dilated cardiomyopathy.
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Affiliation(s)
- Mateusz M Tomczyk
- Diabetes Research Envisioned and Accomplished in Manitoba (DREAM) Theme of the Children's Hospital Research Institute of Manitoba' Winnipeg' Canada (M.M.T., K.G.C., B.X., P.A., S.M.K., V.W.D.).,Department of Pharmacology and Therapeutics (M.M.T., K.G.C., B.X., P.A., S.M.K., V.W.D.), University of Manitoba, Winnipeg, Canada.,Rady Faculty of Health Science, College of Medicine (M.M.T., K.G.C., B.X., P.A., S.M.K., V.S., V.W.D.), University of Manitoba, Winnipeg, Canada
| | - Kyle G Cheung
- Diabetes Research Envisioned and Accomplished in Manitoba (DREAM) Theme of the Children's Hospital Research Institute of Manitoba' Winnipeg' Canada (M.M.T., K.G.C., B.X., P.A., S.M.K., V.W.D.).,Department of Pharmacology and Therapeutics (M.M.T., K.G.C., B.X., P.A., S.M.K., V.W.D.), University of Manitoba, Winnipeg, Canada.,Rady Faculty of Health Science, College of Medicine (M.M.T., K.G.C., B.X., P.A., S.M.K., V.S., V.W.D.), University of Manitoba, Winnipeg, Canada
| | - Bo Xiang
- Diabetes Research Envisioned and Accomplished in Manitoba (DREAM) Theme of the Children's Hospital Research Institute of Manitoba' Winnipeg' Canada (M.M.T., K.G.C., B.X., P.A., S.M.K., V.W.D.).,Department of Pharmacology and Therapeutics (M.M.T., K.G.C., B.X., P.A., S.M.K., V.W.D.), University of Manitoba, Winnipeg, Canada.,Rady Faculty of Health Science, College of Medicine (M.M.T., K.G.C., B.X., P.A., S.M.K., V.S., V.W.D.), University of Manitoba, Winnipeg, Canada
| | - Nahid Tamanna
- Department of Biological Sciences (N.T., A.L.F.T., J.T.), University of Manitoba, Winnipeg, Canada
| | - Ana L Fonseca Teixeira
- Department of Biological Sciences (N.T., A.L.F.T., J.T.), University of Manitoba, Winnipeg, Canada
| | - Prasoon Agarwal
- Diabetes Research Envisioned and Accomplished in Manitoba (DREAM) Theme of the Children's Hospital Research Institute of Manitoba' Winnipeg' Canada (M.M.T., K.G.C., B.X., P.A., S.M.K., V.W.D.).,Department of Pharmacology and Therapeutics (M.M.T., K.G.C., B.X., P.A., S.M.K., V.W.D.), University of Manitoba, Winnipeg, Canada.,Rady Faculty of Health Science, College of Medicine (M.M.T., K.G.C., B.X., P.A., S.M.K., V.S., V.W.D.), University of Manitoba, Winnipeg, Canada.,KTH Royal Institute of Technology, School of Electrical Engineering and Computer Science, Stockholm, Sweden (P.A.).,Science for Life Laboratory, Solna, Sweden (P.A.)
| | - Stephanie M Kereliuk
- Diabetes Research Envisioned and Accomplished in Manitoba (DREAM) Theme of the Children's Hospital Research Institute of Manitoba' Winnipeg' Canada (M.M.T., K.G.C., B.X., P.A., S.M.K., V.W.D.).,Department of Pharmacology and Therapeutics (M.M.T., K.G.C., B.X., P.A., S.M.K., V.W.D.), University of Manitoba, Winnipeg, Canada.,Rady Faculty of Health Science, College of Medicine (M.M.T., K.G.C., B.X., P.A., S.M.K., V.S., V.W.D.), University of Manitoba, Winnipeg, Canada
| | - Victor Spicer
- Department of Internal Medicine (V.S.), University of Manitoba, Winnipeg, Canada.,Rady Faculty of Health Science, College of Medicine (M.M.T., K.G.C., B.X., P.A., S.M.K., V.S., V.W.D.), University of Manitoba, Winnipeg, Canada.,Manitoba Center for Proteomics and Systems Biology, Winnipeg, Canada (V.S.)
| | - Ligen Lin
- Children's Nutrition Research Center, Baylor College of Medicine, Houston, TX (L.L., Q.T.).,Institute of Chinese Medical Sciences, University of Macau, China (L.L.)
| | - Jason Treberg
- Department of Biological Sciences (N.T., A.L.F.T., J.T.), University of Manitoba, Winnipeg, Canada
| | - Qiang Tong
- Children's Nutrition Research Center, Baylor College of Medicine, Houston, TX (L.L., Q.T.)
| | - Vernon W Dolinsky
- Diabetes Research Envisioned and Accomplished in Manitoba (DREAM) Theme of the Children's Hospital Research Institute of Manitoba' Winnipeg' Canada (M.M.T., K.G.C., B.X., P.A., S.M.K., V.W.D.).,Department of Pharmacology and Therapeutics (M.M.T., K.G.C., B.X., P.A., S.M.K., V.W.D.), University of Manitoba, Winnipeg, Canada.,Rady Faculty of Health Science, College of Medicine (M.M.T., K.G.C., B.X., P.A., S.M.K., V.S., V.W.D.), University of Manitoba, Winnipeg, Canada
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Tamanna N, Mayengbam S, House JD, Treberg JR. Methionine restriction leads to hyperhomocysteinemia and alters hepatic H 2S production capacity in Fischer-344 rats. Mech Ageing Dev 2018; 176:9-18. [PMID: 30367932 DOI: 10.1016/j.mad.2018.10.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 10/08/2018] [Accepted: 10/23/2018] [Indexed: 02/07/2023]
Abstract
Dietary methionine restriction (MR) increases lifespan in several animal models. Despite low dietary intake of sulphur amino acids, rodents on MR develop hyperhomocysteinemia. On the contrary, MR has been reported to increase H2S production in mice. Enzymes involved in homocysteine metabolism also take part in H2S production and hence, in this study, the impact of MR on hyperhomocysteinemia and H2S production capacity were investigated using Fischer-344 rats assigned either a control or a MR diet for 8 weeks. The MR animals showed elevated plasma homocysteine accompanied with a reduction in liver cysteine content and methylation potential. It was further found that MR decreased cystathionine-β-synthase (CBS) activity in the liver, however, MR increased hepatic cystathionine-γ-lyase (CGL) activity which is the second enzyme in the transsulfuration pathway and also participates in regulating H2S production. The relative contribution of CGL in H2S production increased concomitantly with the increased CGL activity. Additionally, hepatic mercaptopyruvate-sulphur-transferase (MPST) activity also increased in response to MR. Taken together, our results suggest that reduced CBS activity and S-Adenosylmethionine availability contributes to hyperhomocysteinimia in MR animals. Elevated CGL and MPST activities may provide a compensatory mechanism for maintaining hepatic H2S production capacity in response to the decreased CBS activity.
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Affiliation(s)
- Nahid Tamanna
- Department of Biological Sciences, University of Manitoba, Winnipeg, MB, Canada.
| | - Shyamchand Mayengbam
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB, Canada.
| | - James D House
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB, Canada.
| | - Jason R Treberg
- Department of Biological Sciences, University of Manitoba, Winnipeg, MB, Canada; Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB, Canada; Centre on Aging, University of Manitoba, Winnipeg, MB, Canada.
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Munro D, Banh S, Sotiri E, Tamanna N, Treberg JR. The thioredoxin and glutathione-dependent H2O2 consumption pathways in muscle mitochondria: Involvement in H2O2 metabolism and consequence to H2O2 efflux assays. Free Radic Biol Med 2016; 96:334-46. [PMID: 27101737 DOI: 10.1016/j.freeradbiomed.2016.04.014] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Revised: 04/07/2016] [Accepted: 04/15/2016] [Indexed: 11/25/2022]
Abstract
The most common methods of measuring mitochondrial hydrogen peroxide production are based on the extramitochondrial oxidation of a fluorescent probe such as amplex ultra red (AUR) by horseradish peroxidase (HRP). These traditional HRP-based assays only detect H2O2 that has escaped the matrix, raising the potential for substantial underestimation of production if H2O2 is consumed by matrix antioxidant pathways. To measure this underestimation, we characterized matrix consumers of H2O2 in rat skeletal muscle mitochondria, and developed specific means to inhibit these consumers. Mitochondria removed exogenously added H2O2 (2.5µM) at rates of 4.7 and 5.0nmol min(-1) mg protein(-1) when respiring on glutamate+malate and succinate+rotenone, respectively. In the absence of respiratory substrate, or after disrupting membranes by cycles of freeze-thaw, rates of H2O2 consumption were negligible. We concluded that matrix consumers are respiration-dependent (requiring respiratory substrates), suggesting the involvement of either the thioredoxin (Trx) and/or glutathione (GSH)-dependent enzymatic pathways. The Trx-reductase inhibitor auranofin (2µM), and a pre-treatment of mitochondria with 35µM of 1-chloro-2,4-dintrobenzene (CDNB) to deplete GSH specifically compromise these two consumption pathways. These inhibition approaches presented no undesirable "off-target" effects during extensive preliminary tests. These inhibition approaches independently and additively decreased the rate of consumption of H2O2 exogenously added to the medium (2.5µM). During traditional HRP-based H2O2 efflux assays, these inhibition approaches independently and additively increased apparent efflux rates. When used in combination (double inhibition), these inhibition approaches allowed accumulation of (endogenously produced) H2O2 in the medium at a comparable rate whether it was measured with an end point assay where 2.5µM H2O2 is initially added to the medium or with traditional HRP-based efflux assays. This finding confirms that a high degree of inhibition of all matrix consumers is attained with the double inhibition. Importantly, this double inhibition of the matrix consumers allowed revealing that a large part of the H2O2 produced in muscle mitochondria is consumed before escaping the matrix during traditional HRP-based efflux assays. The degree of this underestimation was substrate dependent, reaching >80% with malate, which complicates comparisons of substrates for their capacity to generate H2O2 in normal conditions i.e. when matrix consumers are active. Our results also urge caution in interpreting changes in H2O2 efflux in response to a treatment; when HRP-based assays are used, large changes in apparent H2O2 efflux may come from altered capacity of the matrix consumers.
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Affiliation(s)
- Daniel Munro
- Department of Biological Sciences, University of Manitoba, Winnipeg, MB, Canada; Centre on Aging, University of Manitoba, Winnipeg, MB, Canada.
| | - Sheena Banh
- Department of Biological Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Emianka Sotiri
- Department of Biological Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Nahid Tamanna
- Department of Biological Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Jason R Treberg
- Department of Biological Sciences, University of Manitoba, Winnipeg, MB, Canada; Department of Human Nutritional Sciences, University of Manitoba, Winnipeg, MB, Canada; Centre on Aging, University of Manitoba, Winnipeg, MB, Canada
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