Breast cancer metastatic potential: correlation with increased heterotypic gap junctional intercellular communication between breast cancer cells and osteoblastic cells

International Journal of Cancer. Journal International Du Cancer
Preeti KapoorHenry J Donahue

Abstract

The breast cancer metastasis-suppressor gene BRMS1 is downregulated in metastatic breast cancer cells. Previous reports have shown restoration of gap junctional intercellular communication (GJIC) in the metastatic human breast carcinoma cell line MDA-MB-435 (435) transfected with BRMS1 cDNA. Metastasis, to a large extent in most breast cancers, occurs to bone. However, the reason for this preferential metastasis is not known. We explored cell-to-cell communication between 435 carcinoma cells and a human osteoblastic cell line, hFOB1.19, to determine whether carcinoma cells can form gap junctions with bone cells and to explore the role of these heterotypic gap junctions and the BRMS1 gene in breast cancer metastasis to bone. 435 cells displayed greater cell-to-cell communication with hFOB 1.19 cells than with themselves. Transfection of BRMS1 into 435 cells increased homotypic gap junctional communication but did not significantly affect heterotypic communication with hFOBs. However, heterotypic communication of BRMS1 transfectants with hFOB cells was reduced relative to homotypic communication. In contrast, parental 435 cells displayed greater heterotypic communication with hFOBs relative to homotypic communication. Our results...Continue Reading

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Dec 11, 2007·Cancer Metastasis Reviews·François-Clément BidardMarie-France Poupon
Jan 15, 2008·Clinical & Experimental Metastasis·Zhongyong LiHenry J Donahue
Oct 8, 2008·Clinical & Experimental Metastasis·Zhongyong LiHenry J Donahue
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