AIM: We investigated the immunohistochemical expression of estrogen receptors alpha (ERalpha) and beta (ERbeta) in pituitary adenoma subtypes combined with clinicopathological factors. MATERIALS AND METHODS: Pituitary adenomas (n=75) were immunostained for ERalpha and ERbeta using the streptavidin-biotin-peroxidase complex method with a monoclonal ERalpha antibody and polyclonal ERbeta antibody. RESULTS: Nuclear immunoreactivity for both receptors was highest among PRL, FSH/LH, null cell, and GH adenomas. ACTH, silent subtypes I and II corticotrophs, and subtype III adenomas were the least immunoreactive for both receptors. ACTH adenomas expressed significantly less ERalpha than FSH-LH, GH, and null cell adenomas. A significantly elevated ERalpha expression was observed in macroadenomas compared to microadenomas and non-invasive compared to invasive tumors. CONCLUSION: ERalpha and ERbeta are differentially expressed in the various pituitary adenoma subtypes suggesting a cell-specific function for these receptors. To elucidate the role of ERalpha in tumor size and invasiveness, additional studies are required.
AIM: We investigated the immunohistochemical expression of estrogen receptors alpha (ERalpha) and beta (ERbeta) in pituitary adenoma subtypes combined with clinicopathological factors. MATERIALS AND METHODS:Pituitary adenomas (n=75) were immunostained for ERalpha and ERbeta using the streptavidin-biotin-peroxidase complex method with a monoclonal ERalpha antibody and polyclonal ERbeta antibody. RESULTS: Nuclear immunoreactivity for both receptors was highest among PRL, FSH/LH, null cell, and GH adenomas. ACTH, silent subtypes I and II corticotrophs, and subtype III adenomas were the least immunoreactive for both receptors. ACTH adenomas expressed significantly less ERalpha than FSH-LH, GH, and null cell adenomas. A significantly elevated ERalpha expression was observed in macroadenomas compared to microadenomas and non-invasive compared to invasive tumors. CONCLUSION:ERalpha and ERbeta are differentially expressed in the various pituitary adenoma subtypes suggesting a cell-specific function for these receptors. To elucidate the role of ERalpha in tumor size and invasiveness, additional studies are required.
Authors: Luis G Perez-Rivas; Marily Theodoropoulou; Francesco Ferraù; Clara Nusser; Kohei Kawaguchi; Constantine A Stratakis; Fabio Rueda Faucz; Luiz E Wildemberg; Guillaume Assié; Rudi Beschorner; Christina Dimopoulou; Michael Buchfelder; Vera Popovic; Christina M Berr; Miklós Tóth; Arif Ibrahim Ardisasmita; Jürgen Honegger; Jerôme Bertherat; Monica R Gadelha; Felix Beuschlein; Günter Stalla; Masayuki Komada; Márta Korbonits; Martin Reincke Journal: J Clin Endocrinol Metab Date: 2015-05-05 Impact factor: 5.958
Authors: María José García-Barrado; Enrique J Blanco; María Carmen Iglesias-Osma; Marta Carretero-Hernández; Leonardo Catalano-Iniesta; Virginia Sanchez-Robledo; Manuel Carretero; Julio Joaquín Herrero; Sixto Carrero; José Carretero Journal: Int J Mol Sci Date: 2017-11-01 Impact factor: 5.923