title: [Comparative studies of the expression of estrogen receptor-alpha and estrogen receptor-beta in prostatic carcinoma].
abstract: OBJECTIVE
  To determine the expression of estrogen receptor-alpha (ERalpha) and estrogen receptor-beta (ERbeta) in prostatic carcinoma (PCa).
  
  
  METHODS
  The expression of ERalpha and ERbeta was analysed in 32 cases of PCa, 12 cases of normal prostate tissue and 32 cases of benign prostate hyperplasia (BPH) by semi-quantitative reverse transcriptase polymerase chain reaction (RT-PCR), and the genes were sequenced.
  
  
  RESULTS
  Compared with the tissue of BPH, the ERalpha expression significantly increased, but the ERbeta expression decreased in the tissue of PCa (P < 0.01). Compared with in the early stage and high differentiation of prostatic carcinoma, the ERalpha expression increased obviously, but ERbeta expression decreased in the developed stage and low differentiation (P < 0.01). ERalpha increased, but ERbeta decreased in hormone-refractory prostatic carcinoma (P < 0.05).
  
  
  CONCLUSIONS
  ERalpha and ERbeta may play an important role in the development of PCa. It is shown that analysis of the expression of ER, especially ERbeta in PCa, will benefit to the diagnosis and treatment of this disease.
authors.affiliation: Department of Urology, First Affiliated Hospital, Medical College of Zhejiang University, Hangzhou 310003, China. yang_guosheng@163.com
authors.forename: Guo-sheng
authors.initials: GS
authors.lastname: Yang
authors.forename: Zhao-dian
authors.initials: ZD
authors.lastname: Chen
mesh_terms: D000368:Aged; D047628:Estrogen Receptor alpha / Q000096:biosynthesis*; D047629:Estrogen Receptor beta / Q000096:biosynthesis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011470:Prostatic Hyperplasia / Q000378:metabolism; D011471:Prostatic Neoplasms / Q000378:metabolism*; D012333:RNA, Messenger / Q000096:biosynthesis; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D047628:Estrogen Receptor alpha; D047629:Estrogen Receptor beta; D012333:RNA, Messenger