DUAN Bing-nan, et al. Biphasic responses of bone to parathyroid hormone-related protein-141 in vitro[J]. Journal of Chongqing Medical University, 2009,34(2):148-151.
DUAN Bing-nan, et al. Biphasic responses of bone to parathyroid hormone-related protein-141 in vitro[J]. Journal of Chongqing Medical University, 2009,34(2):148-151.DOI:
Objective:To determine the role of PTHrP in new bone formation and bone destruction and the mechanisms involved.Methods:LCC15-MB breast cancer cells were transfected with full-length PTHrP-141 cDNA
and the conditioned medium was collected and cultured with mouse calvarial bones in an in vitro organ culture system.The effects of 1PTHrP-141 on new bone formation and bone destruction were examined by histological examination.Results:PTHrP produced from transfected breast cancer cells induced new bone formation at lower doses and bone resorption at higher concentrations.Conclusion:These results provide direct evidence that PTHrP plays a biphasic role in bone remodeling depending on the concentration administered.