dc.creator | Pontiggia, Osvaldo Alejandro | |
dc.creator | Rodriguez, Vanina | |
dc.creator | Fabris, Victoria Teresa | |
dc.creator | Raffo, Diego Alejandro | |
dc.creator | Bumaschny, Viviana Florencia | |
dc.creator | Fiszman, Gabriel Leon | |
dc.creator | Bal, Elisa Dora | |
dc.creator | Simian, Marina | |
dc.date.accessioned | 2022-02-08T01:50:13Z | |
dc.date.accessioned | 2022-10-14T23:04:19Z | |
dc.date.available | 2022-02-08T01:50:13Z | |
dc.date.available | 2022-10-14T23:04:19Z | |
dc.date.created | 2022-02-08T01:50:13Z | |
dc.date.issued | 2009-07 | |
dc.identifier | Pontiggia, Osvaldo Alejandro; Rodriguez, Vanina; Fabris, Victoria Teresa; Raffo, Diego Alejandro; Bumaschny, Viviana Florencia; et al.; Establishment of an in vitro estrogen-dependent mouse mammary tumor model: A new tool to understand estrogen responsiveness and development of tamoxifen resistance in the context of stromal-epithelial interactions; Springer; Breast Cancer Research and Treatment; 116; 2; 7-2009; 247-255 | |
dc.identifier | 0167-6806 | |
dc.identifier | http://hdl.handle.net/11336/151519 | |
dc.identifier | CONICET Digital | |
dc.identifier | CONICET | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4317277 | |
dc.description.abstract | Currently, to our knowledge, there are no continuous cell lines derived from estrogen dependent, tamoxifen sensitive spontaneous mouse mammary carcinomas. We describe here the establishment and characterization of a cell line derived from the M05 mouse mammary tumor, LM05-Mix, composed of both an epithelial and a fibroblastic component. From it the respective epithelial LM05-E and fibroblastic LM05-F cell lines were generated by limiting dilution. Immunofluorescence studies confirmed that the epithelial cells were positive for E-cadherin, cytokeratins and vimentin whereas the fibroblastic cells were negative for the epithelial markers and positive for a-smooth muscle actin and vimentin. Both cell types expressed estrogen and progesterone receptors, although only the epithelial LM05-E cells were stimulated by estradiol and inhibited by tamoxifen. In the bicellular LM05-Mix cell line estradiol proved to stimulate cell proliferation whereas the response to tamoxifen was dependent on confluency and the degree of epithelial-fibroblastic interactions. The presence of membrane estrogen receptors in both cell types was suggested by the achievement of non-genomic responses to short treatments with estradiol, leading to the phosphorylation of ERK1/2. Finally, cytogenetic studies suggest that these two cell types represent independent cell populations within the tumor and would not be the result of an epithelial-mesenchymal transition. This model presents itself as a valuable alternative for the study of estrogen responsiveness and tamoxifen resistance in the context of epithelial-stromal interactions. | |
dc.language | eng | |
dc.publisher | Springer | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s10549-008-0113-3 | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s10549-008-0113-3 | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/restrictedAccess | |
dc.subject | ESTROGEN DEPENDENT MOUSE MAMMARY CANCER | |
dc.subject | BICELLULAR CELL LINE | |
dc.subject | ESTROGEN AND PROGESTERONE RECEPTORS | |
dc.subject | TAMOXIFEN | |
dc.title | Establishment of an in vitro estrogen-dependent mouse mammary tumor model: A new tool to understand estrogen responsiveness and development of tamoxifen resistance in the context of stromal-epithelial interactions | |
dc.type | info:eu-repo/semantics/article | |
dc.type | info:ar-repo/semantics/artículo | |
dc.type | info:eu-repo/semantics/publishedVersion | |