METHODS OF ATTENUATING PROSTATE TUMOR GROWTH BY INSULIN-LIKE GROWTH FACTOR BINDING PROTEIN-3 (IGFBP-3)

摘要

Insulin-like Growth Factor Binding Protein - 3 (IGFBP-3) inhibits cell growth and promotes apoptosis by sequestering free Insulin-like Growth Factor (IGF), and also demonstrates IGF-independent, pro-apoptotic, anti-proliferative effects on prostate cancer cells. Prostate tumor size was significantly attenuated in transgenic mice over-expressing IGFBP-3 compared with wild-type mice. In addition, a marked reduction in late-stage tumor growth was apparent in transgenic mice over expressing mutant-IGFBP-3 indicating that the IGF-independent effects of IGFBP-3 are related to inhibiting tumor progression.