Clinical & Experimental Metastasis

, Volume 15, Issue 3, pp 218–227

Primary prostatic epithelial cell binding to human bone marrow stroma and the role of a2b1 integrin

Authors

  • Shona H. Lang
    • CRC Department of Experimental Haematology, Paterson Institute for Cancer ResearchChristie Hospital NHS Trust
  • Noel W. Clarke
    • Department of SurgeryChristie Hospital NHS Trust
  • Nicholas J. R. George
    • Department of UrologyWithington Hospital
  • Nydia G. Testa
    • CRC Department of Experimental Haematology, Paterson Institute for Cancer ResearchChristie Hospital NHS Trust
Article

DOI: 10.1023/A:1018465213641

Cite this article as:
Lang, S.H., Clarke, N.W., George, N.J.R. et al. Clin Exp Metastasis (1997) 15: 218. doi:10.1023/A:1018465213641

Abstract

Prostate cancer selectively metastasises to the bone. To investigate the importance of prostate epithelial cell adhesion to bone marrow cells in this process we examined the binding of human primary prostatic epithelial cells (PEC) to human bone marrow stromal cultures (BMS). We found that PEC derived from both malignant and benign tissue showed greater adhesion to BMS than to benign prostatic fibroblasts (median difference was 340% and 200% respectively), skin fibroblasts or plastic tissue culture plates. Adhesion to BMS grown from the bone marrow of patients with prostatic skeletal metastases was no different from those grown from normal bone marrow. The role of integrin molecules in these cell interactions was determined. Collagen type I and fibronectin were found to increase PEC adhesion whereas vitronectin and laminin did not. Inhibition studies demonstrated that although there was heterogeneity between samples, antibodies against the integrins a2 and b1 consistently inhibited PEC binding to BMS. This result was more marked for PEC derived from malignant tissue. However studies investigating the effects of disintegrins and anti-a3 and anti-a5 integrins indicated that for a percentage of patients these integrins and RGD (arginine, glycine, aspartamine)-dependent binding pathways were also involved. In summary, the results indicate that BMS are adherent to primary PEC derived from both malignant and benign tissue. The integrin a2b1 is a major contributor to this interaction.

Keywordsadhesionbone marrowintegrinsmetastasisprostate cancer
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© Chapman and Hall 1997