Skeletal muscle transcriptional alterations in BC-PDOX bearing mice

Cancer-associated skeletal muscle fatigue is a common problem in clinical oncology that is often associated with cancer cachexia, but is not exclusively observed in cachectic patients. The majority of breast cancer (BC) patients report muscle fatigue despite cachexia being relatively rare in this patient population. The clinically relevant phenotype of muscle fatigue in the absence of frank cachexia has no established model system and no approved therapeutic agents. Here, we utilize a breast cancer patient-derived orthotopic xenograft (BC-PDOX) model to recapitulate the human phenotype of tumor-induced muscle fatigue without muscle wasting, and utilized RNA-sequencing to identify pathways contributing to this clinically common phenomenon.