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"senescence and prostate: steroid hormone interaction and growth factors in the microenvironment glandular"

Grant number: 10/01739-1
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): May 01, 2011
Effective date (End): February 28, 2013
Field of knowledge:Biological Sciences - Morphology
Principal Investigator:Valéria Helena Alves Cagnon Quitete
Grantee:Amanda Cia Hetzl
Home Institution: Instituto de Biologia (IB). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

Senescence is a determining factor in the occurrence of prostate morphological changes, considering the hormonal imbalance and paracrine interactions between epithelium and stroma by means of steroid hormones and different growth factors. However, the role of hormonal therapy and its interactions with the environment prostate is unclear, as well as the dynamics of growth factors in the glandular events in the senescence. Thus, the objective of this study is to characterize and correlate the interactions between different molecules such as FGF-2, FGF-7, FGF-8, EGF, ±-actin and vimentin and AR, ER±, ER² and Prolactin receptors in the epithelial and stromal, separately, in relation to the senescence and hormonal imbalance. Fifty senile male rats (10 month old rats) and ten young male rats (4 month old rats) will be divided into six groups. The Senile /Control group and The Young/Control group will receive 5mL/kg peanut oil every other day for 30 days; The Castrated group: animals will be anesthetized with posterior surgical and chemical castration (10mg/Kg flutamide every other day for 30 days); The Tamoxifen-Letrozol group: animals will receive 1mg/Kg tamoxifen every other day for 30 days and 1mg/Kg letrozol every other day for 30 days; The Castrated + Estrogen group: animals will be surgically and chemically castrated and after will receive 25¼g/kg 17²-estradiol every other day for 30 days; The Tamoxifen-Letrozol + Androgen: animals will receive 1mg/Kg tamoxifen every other day for 30 days and 1mg/Kg letrozol every other day for 30 days and later will receive 5mg/kg testosterone cypionate every other day for 30 days. After the experimental period, the animals will be sacrificed and samples of ventral lobe will be collected. Thirty human prostatic samples will be collected from peripheral prostatic zone obtained from prostatectomized patients (60-90 years old) and divided into two groups: cancer of high grade and cancer of low grade. All samples will be microdissected and submitted to immunological and Western Blotting analysis, including hormonal dosages.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
HETZL, AMANDA CIA; MONTICO, FABIO; KIDO, LARISSA AKEMI; ALVES CAGNON, VALERIA HELENA. Prolactin, EGFR, vimentin and alpha-actin profiles in elderly rat prostate subjected to steroid hormonal imbalance. TISSUE & CELL, v. 48, n. 3, p. 189-196, JUN 2016. Web of Science Citations: 1.
HETZL, A. C.; MONTICO, F.; LORENCINI, R. M.; KIDO, L. A.; CANDIDO, E. M.; CAGNON, V. H. A. Prostatic microenvironment in senescence: fibroblastic growth factors x hormonal imbalance. Histochemistry and Cell Biology, v. 141, n. 5, p. 531-542, MAY 2014. Web of Science Citations: 6.
HETZL, AMANDA CIA; MONTICO, FABIO; LORENCINI, RAISA MISITIERI; KIDO, LARISSA; CANDIDO, EDUARDO; BILLIS, ATHANASE; FERREIRA, UBIRAJARA; HA CAGNON, VALERIA. Fibroblast growth factor, estrogen, and prolactin receptor features in different grades of prostatic adenocarcinoma in elderly men. MICROSCOPY RESEARCH AND TECHNIQUE, v. 76, n. 3, p. 321-330, MAR 2013. Web of Science Citations: 10.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
HETZL, Amanda Cia. Senescence and prostate : steroid hormone and growth factors interactions in the glandular microenvironment. 2013. Doctoral Thesis - Universidade Estadual de Campinas (UNICAMP). Instituto de Biologia.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.