Platelet-Derived Growth Factor Regulates Breast Cancer Progression via β-Catenin Expression

Pathobiology - Tập 78 Số 5 - Trang 253-260 - 2011
Yuhki Yokoyama1, Seiji Mori1, Yoshinosuke Hamada1, Miki Hieda1, Naomasa Kawaguchi1, Mohammed Shaker1, Tao Yu1, Katsuhide Yoshidome2, Masahiko Tsujimoto3, Nariaki Matsuura∥1
1Department of Molecular Pathology, Osaka University Graduate School of Medicine and Health Science, and Departments of
2Surgery and
3Pathology, Osaka Police Hospital, Osaka, Japan

Tóm tắt

<i>Objective:</i> The knowledge on the association between platelet-derived growth factor (PDGF) signaling and epithelial cancers is scarce, although overexpression of PDGF and PDGF receptors has been reported in some human mesenchymal tumors. Thus, we studied the effect of PDGF on breast cancer cells in vitro and the distribution of PDGF in breast cancer tissues. <i>Methods:</i> The effect of PDGF-BB on breast cancer cells was assessed by Western blotting, immunofluorescence, WST and 5-bromo-2-deoxyuridine incorporation experiments. PDGF-B and β-catenin expression was investigated in breast cancer tissues by immunohistochemistry. <i>Results:</i> PDGF-BB induces β-catenin expression in breast cancer cells, and immunohistochemically the distribution of PDGF-B was similar to β-catenin in breast cancer cells. PDGF-B-positive cancer cells were more frequent in cases of ductal carcinoma in situ (87.5%) than invasive carcinoma (61.2%). In addition, PDGF-B staining was stronger in intraductal than invasive cancer cells. PDGF-BB tended to induce nuclear translocation of β-catenin, cell proliferation and DNA incorporation in MDA-MB231 cells, while these results were not found in MCF-7 cells. <i>Conclusion:</i> Our results suggest that PDGF-BB regulates protein expression of β-catenin and is associated with cancer cell behavior.

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