Bitte aktivieren Sie JavaScript in Ihrem Browser um unseren Internetauftritt optimal nutzen zu können.

Prostate., 2006; 66(8): 789-800, PMID: 16482567

IGF-I secretion by prostate carcinoma cells does not alter tumor-bone cell interactions in vitro or in vivo

Jahr: 2006

Rubin J, Fan X, Rahnert J, Sen B, Hsieh CL, Murphy TC, Nanes MS, Horton LG, Beamer WG, Rosen CJ
Department of Medicine, Emory University & VAMC, Decatur, Georgia.


BACKGROUND: IGF-I is an important growth and differentiative factor for osteoblasts and may have a role in defining prostate cancer risk and skeletal metastases. METHODS: Conditioned media (CM) from human prostate cancer (PC), C4-2 and C4-2B, which produce osteoblastic lesions, and PC-3, which causes osteolysis, was added to MC3T3-E1 bone cultures. SCID mice were injected intratibially with these engineered cells. Tumor bearing tibiae were analyzed by microCT and pQCT. RESULTS: CM from PC cells increased osteoblast proliferation and differentiation and was unaltered by the type of PC cell, IGF-I antibodies, or exogenous IGF-I and IGFBP2. Study of intratibial PC tumors in SCID mice showed that C4-2 cells grew slowly preserving bone structure, while PC-3 tumors caused rapid osteolysis. Overexpression of IGF-I did not change either tumor progression or skeletal response. CONCLUSIONS: IGF-I is neither necessary nor sufficient for the osteoblastic response to PC metastases.

GID: 904; Letzte Änderung: 23.01.2008