Inverse relation between prostate-specific antigen and insulin-like growth factor-binding protein 3 in bone metastases and serum of patients with prostate cancer.

Smith, G L; Doherty, A P; Mitchell, H; Hanham, I W; Christmas, T J; Epstein, R J · Lancet · 1999

basic_science · Level V

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Abstract

The usual osteoblastic phenotype of metastatic prostate cancer is unexplained. Here we show that tissue and serum concentrations of prostate-specific antigen (PSA)-vary inversely with a substrate protein that binds a growth factor known to activate osteoblasts. These findings suggest that PSA may contribute to the osteoblastic phenotype, and could thus represent a new drug target devoid of antiandrogenic toxicity.

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