Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA.

Prostate cancer (PCa) is one of the solid tumors that metastasize to the bone. Once there, the phenotype of the bone lesions is dependent upon the balance between osteoblastogenesis and osteoclastogenesis. We previously reported that overexpression of phosphoglycerate kinase 1 (PGK1) in PCa cell lines enhanced bone formation at the metastatic site in vivo. Here, the role of PGK1 in the bone formation was further explored. We show that PCa-derived PGK1 induces osteoblastic differentiation of bone marrow stromal cells. We also found that PGK1 secreted by PCa inhibits osteoclastogenesis. Finally, the expression levels of the bone-specific markers in PCa cells were higher in cells overexpressing PGK1 than controls. Together, these data suggest that PGK1 secreted by PCa regulates bone formation at the metastatic site by increasing osteoblastic activity, decreasing osteoclastic function, and expressing an osteoblastic phenotype by PCa cells.

Written by:
Jung Y, Shiozawa Y, Wang J, Wang J, Wang Z, Pedersen EA, Lee CH, Hall CL, Hogg PJ, Krebsbach PH, Keller ET, Taichman RS.   Are you the author?

Reference:
Mol Cancer Res. 2009 Oct;7(10):1595-604.
doi:10.1158/1541-7786.MCR-09-0072

PubMed Abstract
PMID:19825988

UroToday.com Prostate Cancer Section

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