title: [siRNA knocks down the expression of AR gene in PC3 cell lines].
abstract: OBJECTIVE
  To observe the suppression of the expression of androgen receptor (AR) gene in PC3 cells after AR-specific siRNAs transfection, and to search for the siRNA (s) with the greatest suppressing efficiency.
  
  
  METHODS
  Five AR-specific siRNAs were selected, RNAi expression vectors were constructed and transfected into PC3 cells, and the AR expression was detected by real time FQ-PCR and Western blot. A nonsense small RNA was set as negative control.
  
  
  RESULTS
  Compared with the control group, the AR expression decreased in various degrees in the 5 experimental groups (P < 0.05), and siRNA1, siRNA4 and siRNA5 showed the greatest suppressing efficiency as compared with the other experimental groups, with statistically significant difference (P < 0.05).
  
  
  CONCLUSIONS
  The AR-specific siRNAs could suppress the endogenous expression of target gene. Three siRNAs with great suppressing efficiency were identified and the expression vectors were constructed successfully. It can be applied in the future researches in vivo.
authors.affiliation: Department of Urology, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510080, China. sumscw@126.com
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.forename: Bin
authors.initials: B
authors.lastname: Yu
authors.forename: Dan
authors.initials: D
authors.lastname: Xie
authors.forename: Ling-wu
authors.initials: LW
authors.lastname: Chen
authors.forename: Jun-hang
authors.initials: JH
authors.lastname: Luo
authors.forename: Jian
authors.initials: J
authors.lastname: Lu
authors.forename: Yu-ping
authors.initials: YP
authors.lastname: Dai
authors.forename: Ke-li
authors.initials: KL
authors.lastname: Zheng
authors.forename: Hua
authors.initials: H
authors.lastname: Mei
mesh_terms: D015153:Blotting, Western; D045744:Cell Line, Tumor; D005822:Genetic Vectors / Q000235:genetics; D006801:Humans; D008297:Male; D011471:Prostatic Neoplasms / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D034622:RNA Interference; D034741:RNA, Small Interfering / Q000235:genetics*; D011944:Receptors, Androgen / Q000235:genetics* / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000379:methods; D014162:Transfection
chemical_list: D034741:RNA, Small Interfering; D011944:Receptors, Androgen