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lüll Quercetin-induced cardioprotection against doxorubicin cytotoxicity Chen JY; Hu RY; Chou HCJ Biomed Sci 2013[Dec]; 20 (1): 95BACKGROUND: Cancer has continually been the leading cause of death worldwide for decades. Thus, scientists have actively devoted themselves to studying cancer therapeutics. Doxorubicin is an efficient drug used in cancer therapy, but also produces reactive oxygen species (ROS) that induce severe cytotoxicity against heart cells. Quercetin, a plant-derived flavonoid, has been proven to contain potent antioxidant and anti-inflammatory properties. Thus, this in vitro study investigated whether quercetin can decrease doxorubicin-induced cytotoxicity and promote cell repair systems in cardiomyocyte H9C2 cells. RESULTS: Proteomic analysis and a cell biology assay were performed to investigate the quercetin-induced responses. Our data demonstrated that quercetin treatment protects the cardiomyocytes in a doxorubicin-induced heart damage model. Quercetin significantly facilitated cell survival by inhibiting cell apoptosis and maintaining cell morphology by rearranging the cytoskeleton. Additionally, 2D-DIGE combined with MALDI-TOF MS analysis indicated that quercetin might stimulate cardiomyocytes to repair damage after treating doxorubicin by modulating metabolic activation, protein folding and cytoskeleton rearrangement. CONCLUSION: Based on a review of the literature, this study is the first to report detailed protective mechanisms for the action of quercetin against doxorubicin-induced cardiomyocyte toxicity based on in-depth cell biology and proteomic analysis.|*Apoptosis[MESH]|*Cell Survival[MESH]|Animals[MESH]|Antibiotics, Antineoplastic/*toxicity[MESH]|Antioxidants/*pharmacology[MESH]|Cell Line[MESH]|Doxorubicin/*toxicity[MESH]|Myocytes, Cardiac/*drug effects/physiology[MESH]|Quercetin/*pharmacology[MESH]|Rats[MESH]|Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization[MESH]|Two-Dimensional Difference Gel Electrophoresis[MESH] |