Please use this identifier to cite or link to this item: http://hdl.handle.net/10201/29663

Title: Glucocorticoid receptor changes its cellular location with breast cancer development
Issue Date: 2008
Publisher: Murcia : F. Hernández
ISSN: 0213-3911
Related subjects: 616 - Patología. Medicina clínica. Oncología
Keywords: Breast cancer
Abstract: Glucocorticoids play a major role in attenuation of the inflammatory response and they are useful in the primary combination chemotherapy of breast cancer, since in vitro studies have demonstrated an antiproliferative effect in human breast cancer cells. In contrast, it was recently shown that glucocorticoids protect against apoptotic signals evoked by cytokines, cAMP, tumour suppressors, and death genes in mammary gland epithelia. Their actions are mediated by intracellular receptor (GR) that functions as a hormonedependent transcription factor; however, no previous studies have been focused on GR expression in different pathologies of the human breast, and the possible relationship with that of mineralocorticoid receptor (MR) and COX-2. Also, the role of these proteins on tumoral breast epithelial cells remains unclear. Therefore, we examined GR, MR and COX-2 expression by immunohistochemistry and Western blot techniques in 142 samples of human breast obtained by total or partial mastectomy. We found that the percentage of positive patients presenting nuclear immunoreaction to GR decreased with tumor development, while all samples analyzed showed cytoplasmic immunoreactions to MR. All positive samples to COX-2 antibody showed cytoplasmic location, a higher immunoreaction being observed in benign breast diseases than in carcinomatous lesions. Thus, breast cancer progression is associated with the accumulation of GR in the cytoplasm of tumoral cells and the decrease of COX-2 expression.
Primary author: Conde, Isabel
Paniagua, Ricardo
Fraile, Benito
Lucio, Javier
Arenas, María I.
Published in: Histology and histopathology
URI: http://hdl.handle.net/10201/29663
Document type: info:eu-repo/semantics/article
Number of pages / Extensions: 9
Rights: info:eu-repo/semantics/openAccess
Appears in Collections:Vol.23, nº1 (2008)

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