Senescence and steroid hormone receptor reactivities in accessory sex glands of elderly rats (Sprague-Dawley) following exogenous hormonal therapy

Autor(es)

Candido, Eduardo Marcelo ^[1] ; Favaro, Wagner Jose ^[1] ; Montico, Fabio ^[1] ; Hetzl, Amanda Cia ^[1] ; Alves Cagnon, Valeria Helena ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Biol, Dept Anat Cellular Biol Physiol & Biophys, UNICAMP, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: TISSUE & CELL; v. 44, n. 4, p. 227-237, AUG 2012.
• Citações Web of Science: 3

Resumo

The aim of this study was to characterize the stromal and epithelial distribution of AR, ER alpha and ER beta reactivities in the different accessory sex glands of elderly rats and during strong hormonal changes. Ten month old male rats were divided into six senile groups and submitted to treatment: Senile/Control group (SC); Senile/Testosterone group (ST): Senile/Estrogen group (SE); Castrated group (CA); Castrated/Testosterone group (CT); Castrated/Estrogen group (CE). After a 30-day treatment, the prostatic ventral lobe (VL), dorsal lobe (DL) and coagulating gland (CG) samples were processed for immunohistochemistry and Western Blotting. The results showed that AR immunoreactivity was characterized in the epithelium of VL and DL in senile/control rats and senile rats submitted to exogenous hormonal therapy. AR reactivity in the coagulating gland was verified predominantly in the stromal cells in the different experimental groups. ER alpha reactivity occurred predominantly in the stromal compartment in all accessory sex glands. In the DL and CG, ER alpha immunoreactivities were intense in the groups which received testosterone (ST) and estrogen (SE). ER beta immunoreactivity in the CG was verified in the stromal compartment in the different experimental groups, showing a positive response to both increased testosterone and estrogen levels. ER beta reactivity, in the DL, was intensified in the stroma of senile rats with higher serum testosterone levels, and in senile rats with increased serum estrogen levels, especially in the glandular epithelium. Thus, the results revealed different distribution pattern of steroid hormone receptors in each one of the prostatic lobes in senescence, especially in the prostate dorsal lobe and coagulating gland, which is a fundamental factor due to the fact that major prostatic diseases occur in a later period of life. Published by Elsevier Ltd. (AU)

• Processo FAPESP: 09/50396-2 - Células-tronco prostáticas: distribuição específica nos compartimentos epitelial e estromal da próstata ventral de ratos senis frente a diferentes condições hormonais e na próstata de homens senis com e sem diagnóstico de lesão glandular
• Beneficiário: Valéria Helena Alves Cagnon Quitete
• Modalidade de apoio: Auxílio à Pesquisa - Regular