“…Osteoblasts may also induce collagen synthesis and mineralization of newly formed bone (9) [26,31,50,65,66]. GH and IGFs may regulate osteoclastic differentiation (10) [64,68,71,72] and activity (11,12) [64,67,68,71]. IGFs bound to IGFBP-5 and trapped in bone matrix during bone formation (13) [50,59,60], may be released during osteoclastic resorption (14) to couple these processes.…”