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Mineralized human primary osteoblast matrices as a model system to analyse interactions of prostate cancer cells with the bone microenvironment

Reichert, Johannes C., Quent, Verena M. C, Burke, Leslie J., Stansfield, Scott H., Clements, Judith A., & Hutmacher, Dietmar W. (2010) Mineralized human primary osteoblast matrices as a model system to analyse interactions of prostate cancer cells with the bone microenvironment. Biomaterials, 31, pp. 7928-7936.

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Abstract

Prostate cancer metastasis is reliant on the reciprocal interactions between cancer cells and the bone niche/micro-environment. The production of suitable matrices to study metastasis, carcinogenesis and in particular prostate cancer/bone micro-environment interaction has been limited to specific protein matrices or matrix secreted by immortalised cell lines that may have undergone transformation processes altering signaling pathways and modifying gene or receptor expression. We hypothesize that matrices produced by primary human osteoblasts are a suitable means to develop an in vitro model system for bone metastasis research mimicking in vivo conditions. We have used a decellularized matrix secreted from primary human osteoblasts as a model for prostate cancer function in the bone micro-environment. We show that this collagen I rich matrix is of fibrillar appearance, highly mineralized, and contains proteins, such as osteocalcin, osteonectin and osteopontin, and growth factors characteristic of bone extracellular matrix (ECM). LNCaP and PC3 cells grown on this matrix, adhere strongly, proliferate, and express markers consistent with a loss of epithelial phenotype. Moreover, growth of these cells on the matrix is accompanied by the induction of genes associated with attachment, migration, increased invasive potential, Ca2+ signaling and osteolysis. In summary, we show that growth of prostate cancer cells on matrices produced by primary human osteoblasts mimics key features of prostate cancer bone metastases and thus is a suitable model system to study the tumor/bone micro-environment interaction in this disease.

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17 citations in Web of Science®

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ID Code: 37971
Item Type: Journal Article
Keywords: Osteoblast matrix, prostate cancer, metastatsis, bone, microenvironment
DOI: 10.1016/j.biomaterials.2010.06.055
ISSN: 0142-9612
Subjects: Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > MEDICAL BIOTECHNOLOGY (100400) > Regenerative Medicine (incl. Stem Cells and Tissue Engineering) (100404)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > ONCOLOGY AND CARCINOGENESIS (111200) > Cancer Cell Biology (111201)
Divisions: Current > Institutes > Institute of Health and Biomedical Innovation
Deposited On: 18 Oct 2010 12:00
Last Modified: 01 Mar 2012 00:17

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