Insulin-like growth factor I (IGF-I) stimulates osteoblastic cells in culture to proliferate and to synthesize bone matrix proteins. However, local IGF-I action is modulated by a family of IGF-binding proteins (IGFBPs) that, in turn, are modified by specific IGFBP proteases. All these components of the IGF-I regulatory system are present and operative in bone cells in vitro. (C) 2000 Harcourt Publishers Ltd.
- IGFBP protease
- IGFBP-4 and -5
- Insulin-like growth factor I
- Insulin-like growth factor-binding protein (IGFBP)
ASJC Scopus subject areas
- Endocrinology, Diabetes and Metabolism