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• W2034783874 abstract "Chronic anthracycline cardiotoxicity is a feared complication of cancer chemotherapy. However, despite several decades of primarily hypothesis-driven research, the molecular basis of this phenomenon remains poorly understood. The aim of this study was to obtain integrative molecular insights into chronic anthracycline cardiotoxicity and the resulting heart failure. Cardiotoxicity was induced in rabbits (daunorubicin 3 mg/kg, weekly, 10 weeks) and changes in the left ventricular proteome were analyzed by 2D-DIGE. The protein spots with significant changes (p<0.01, >1.5-fold) were identified using MALDI-TOF/TOF. Key data were corroborated by immunohistochemistry, qRT-PCR and enzyme activity determination and compared with functional, morphological and biochemical data. The most important alterations were found in mitochondria — especially in proteins crucial for oxidative phosphorylation, energy channeling, antioxidant defense and mitochondrial stress. Furthermore, the intermediate filament desmin, which interacts with mitochondria, was determined to be distinctly up-regulated and disorganized in its expression pattern. Interestingly, the latter changes reflected the intensity of toxic damage in whole hearts as well as in individual cells. In addition, a marked drop in myosin light chain isoforms, activation of proteolytic machinery (including the proteasome system), increased abundance of chaperones and proteins involved in chaperone-mediated autophagy, membrane repair as well as apoptosis were found. In addition, dramatic changes in proteins of basement membrane and extracellular matrix were documented. In conclusion, for the first time, the complex proteomic signature of chronic anthracycline cardiotoxicity was revealed which enhances our understanding of the basis for this phenomenon and it may enhance efforts in targeting its reduction." @default.
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• W2034783874 date "2011-05-01" @default.
• W2034783874 modified "2023-10-11" @default.
• W2034783874 title "Proteomic insights into chronic anthracycline cardiotoxicity" @default.
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• W2034783874 doi "https://doi.org/10.1016/j.yjmcc.2011.01.018" @default.
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