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- W2064754808 abstract "Abstract Estrogen effects on mammary gland development and differentiation are mediated by two receptors (ERα and ERβ). Estrogen‐bound ERα induces proliferation of mammary epithelial and cancer cells, while ERβ is important for maintenance of the differentiated epithelium and inhibits proliferation in different cell systems. In addition, the normal breast contains higher ERβ levels compared to the early stage breast cancers, suggesting that loss of ERβ could be important in cancer development. Analysis of ERβ−/− mice has consistently revealed reduced expression of cell adhesion proteins. As such, ERβ is a candidate modulator of epithelial homeostasis and metastasis. Consequently, the aim of this study was to analyze estrogenic effects on adhesion of breast cancer cells expressing ERα and ERβ. As ERβ is widely found in breast cancer but not in cell lines, we used ERα positive T47‐D and MCF‐7 human breast cancer cells to generate cells with inducible ERβ expression. Furthermore, the colon cancer cell lines SW480 and HT‐29 were also used. Integrin α1 mRNA and protein levels increased following ERβ expression. Integrin β1—the unique partner for integrin α1—increased only at the protein level. ERβ expression enhanced the formation of vinculin containing focal complexes and actin filaments, indicating a more adhesive potential. This was confirmed by adhesion assays where ERβ increased adhesion to different extracellular matrix proteins, mostly laminin. In addition, ERβ expression was associated to less cell migration. These results indicate that ERβ affects integrin expression and clustering and consequently modulates adhesion and migration of breast cancer cells. J. Cell. Physiol. 222:156–167, 2010. © 2009 Wiley‐Liss, Inc." @default.
- W2064754808 created "2016-06-24" @default.
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- W2064754808 date "2009-09-24" @default.
- W2064754808 modified "2023-10-17" @default.
- W2064754808 title "Expression of estrogen receptor β increases integrin α1 and integrin β1 levels and enhances adhesion of breast cancer cells" @default.
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- W2064754808 doi "https://doi.org/10.1002/jcp.21932" @default.
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