Zoledronic acid inhibits osteosarcoma growth in an orthotopic model.

Abstract:

:Zoledronic acid (ZOL) has been shown to reduce osteolysis in bone metastasis. Its efficacy in osteosarcoma has not been convincingly proved in a clinically relevant model for the disease. In vitro, ZOL decreased osteosarcoma cell proliferation, mainly due to an increase in apoptosis in a dose-dependent fashion. There was a decrease in cell migration at >or=10 micromol/L concentrations, but invasion was inhibited at a much lower dose of 0.1 micromol/L. Reverse transcription-PCR showed that ZOL overall caused an increased expression of osteocalcin and decreased expression of alkaline phosphatase, osteopontin, osteonectin, and vascular endothelial growth factor, with no change in expression of osteoprotegerin. ZOL administration s.c. twice weekly at 0.12 mg/kg to SaOS-2 tumor-bearing mice resulted in primary tumor growth inhibition, reduction in lung metastases, and dramatic decrease in osteolysis. Furthermore, in the ZOL cohort, there was a clear reduction in the number of osteoclasts in bone exposed to tumor and a lower tumor vessel density. These data point to the adjuvant potential of ZOL in the management of osteosarcoma not only for its antiosteolytic properties but also for its ability to directly halt tumor cell growth and metastasis via its effects on viability, invasion, differentiation, and angiogenesis.

journal_name

Mol Cancer Ther

authors

Dass CR,Choong PF

doi

10.1158/1535-7163.MCT-07-0546

subject

Has Abstract

pub_date

2007-12-01 00:00:00

pages

3263-70

issue

12 Pt 1

eissn

1535-7163

issn

1538-8514

pii

6/12/3263

journal_volume

6

pub_type

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