Abstract
Malignant cells are characterized by complex and often overlapping signaling pathways that modulate uncontrolled proliferation, leading to tumor growth and cancer progression. Prostate cancer is characterized by a dependence on androgens for growth initiation, and androgen deprivation is the standard treatment for advanced disease. Invariably, progression to castration-resistant prostate cancer (CRPC) occurs. Effective treatment options are currently limited to cytotoxic chemotherapy. In addition to androgen-mediated androgen receptor (AR) signaling in CRPC, multiple growth factor pathways are active, including the epidermal growth factor (EGF) receptor family of tyrosine kinases. Crosstalk between these two pathways has been studied in prostate cancer cell lines, xenograft tumor models, and in prostate cancer patients. This manuscript will focus on EGFR signaling, AR signaling, EGFR-AR crosstalk, and therapies targeted at these receptor-mediated regulatory pathways in CRPC
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