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Zhao Y, Miriyala S, Miao L, Mitov M, Schnell D, Dhar SK, Cai J, Klein JB, Sultana R, Butterfield DA, Vore M, Batinic-Haberle I, Bondada S, St Clair DK. Redox proteomic identification of HNE-bound mitochondrial proteins in cardiac tissues reveals a systemic effect on energy metabolism after doxorubicin treatment. Free Radic Biol Med 2014; 72:55-65. [PMID: 24632380 PMCID: PMC4053505 DOI: 10.1016/j.freeradbiomed.2014.03.001] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 02/17/2014] [Accepted: 03/04/2014] [Indexed: 10/25/2022]
Abstract
Doxorubicin (DOX), one of the most effective anticancer drugs, is known to generate progressive cardiac damage, which is due, in part, to DOX-induced reactive oxygen species (ROS). The elevated ROS often induce oxidative protein modifications that result in alteration of protein functions. This study demonstrates that the level of proteins adducted by 4-hydroxy-2-nonenal (HNE), a lipid peroxidation product, is significantly increased in mouse heart mitochondria after DOX treatment. A redox proteomics method involving two-dimensional electrophoresis followed by mass spectrometry and investigation of protein databases identified several HNE-modified mitochondrial proteins, which were verified by HNE-specific immunoprecipitation in cardiac mitochondria from the DOX-treated mice. The majority of the identified proteins are related to mitochondrial energy metabolism. These include proteins in the citric acid cycle and electron transport chain. The enzymatic activities of the HNE-adducted proteins were significantly reduced in DOX-treated mice. Consistent with the decline in the function of the HNE-adducted proteins, the respiratory function of cardiac mitochondria as determined by oxygen consumption rate was also significantly reduced after DOX treatment. Treatment with Mn(III) meso-tetrakis(N-n-butoxyethylpyridinium-2-yl)porphyrin, an SOD mimic, averted the doxorubicin-induced mitochondrial dysfunctions as well as the HNE-protein adductions. Together, the results demonstrate that free radical-mediated alteration of energy metabolism is an important mechanism mediating DOX-induced cardiac injury, suggesting that metabolic intervention may represent a novel approach to preventing cardiac injury after chemotherapy.
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Affiliation(s)
- Y Zhao
- Graduate Center for Toxicology, University of Kentucky, Lexington, KY 40506, USA
| | - S Miriyala
- Graduate Center for Toxicology, University of Kentucky, Lexington, KY 40506, USA; Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences, Shreveport, LA 71130, USA
| | - L Miao
- Graduate Center for Toxicology, University of Kentucky, Lexington, KY 40506, USA
| | - M Mitov
- Free Radical Biology in Cancer Shared Resource Facility, Markey Cancer Center, University of Kentucky, Lexington, KY 40506, USA
| | - D Schnell
- Graduate Center for Toxicology, University of Kentucky, Lexington, KY 40506, USA
| | - S K Dhar
- Graduate Center for Toxicology, University of Kentucky, Lexington, KY 40506, USA
| | - J Cai
- Department of Nephrology and Proteomics Facility, University of Louisville, Louisville, KY 40292, USA
| | - J B Klein
- Department of Nephrology and Proteomics Facility, University of Louisville, Louisville, KY 40292, USA
| | - R Sultana
- Department of Chemistry, Center of Membrane Sciences, and Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY 40506, USA
| | - D A Butterfield
- Free Radical Biology in Cancer Shared Resource Facility, Markey Cancer Center, University of Kentucky, Lexington, KY 40506, USA; Department of Chemistry, Center of Membrane Sciences, and Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY 40506, USA
| | - M Vore
- Graduate Center for Toxicology, University of Kentucky, Lexington, KY 40506, USA
| | - I Batinic-Haberle
- Department of Radiation Oncology, Duke University School of Medicine, Durham, NC 27710, USA
| | - S Bondada
- Department of Immunology, University of Kentucky, Lexington, KY 40506, USA
| | - D K St Clair
- Graduate Center for Toxicology, University of Kentucky, Lexington, KY 40506, USA.
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