Abstract

The insulin-like growth factor (IGF) axis plays a critical role in both the normal and cancer cell growth. IGF-I binds to the IGF-I receptor and begins a signaling cascade that regulates cell proliferation, apoptosis, and differentiation. The bioavailability of IGF-I is controlled by the binding protein, IGF binding protein-3 (IGFBP-3). In addition, IGFBP-3 is a strong anti-proliferative protein that provokes apoptosis and inhibits cell proliferation in prostate cancer. We conducted this study to investigate the association between insulin-like growth factor (IGF) binding protein-3 (IGFBP-3) gene polymorphism and serum levels of IGF-I and IGFBP-3 and the incidence of prostate cancer (PCa) and benign prostatic hyperplasia (BPH).

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