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- W2890169690 abstract "How breast cancer and its treatments affect skeletal muscle is not well defined. To address this question, we assessed skeletal muscle structure and protein expression in 13 women who were diagnosed with breast cancer and receiving adjuvant chemotherapy following tumor resection and 12 nondiseased controls. Breast cancer patients showed reduced single-muscle fiber cross-sectional area and fractional content of subsarcolemmal and intermyofibrillar mitochondria. Drugs commonly used in breast cancer patients (doxorubicin and paclitaxel) caused reductions in myosin expression, mitochondrial loss, and increased reactive oxygen species (ROS) production in C2C12 murine myotube cell cultures, supporting a role for chemotherapeutics in the atrophic and mitochondrial phenotypes. Additionally, concurrent treatment of myotubes with the mitochondrial-targeted antioxidant MitoQ prevented chemotherapy-induced myosin depletion, mitochondrial loss, and ROS production. In patients, reduced mitochondrial content and size and increased expression and oxidation of peroxiredoxin 3, a mitochondrial peroxidase, were associated with reduced muscle fiber cross-sectional area. Our results suggest that chemotherapeutics may adversely affect skeletal muscle in patients and that these effects may be driven through effects of these drugs on mitochondrial content and/or ROS production." @default.
- W2890169690 created "2018-09-27" @default.
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- W2890169690 date "2018-11-01" @default.
- W2890169690 modified "2023-10-17" @default.
- W2890169690 title "Skeletal muscle atrophy and dysfunction in breast cancer patients: role for chemotherapy-derived oxidant stress" @default.
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- W2890169690 doi "https://doi.org/10.1152/ajpcell.00002.2018" @default.
- W2890169690 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6293050" @default.
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