title: [SiRNA inhibition of E6AP expression in cervical cancer cells].
abstract: OBJECTIVE
  To study the effect of RNA interference (RNAi) targeting E6AP on the proliferation and apoptosis of HeLa cells.
  
  
  METHODS
  HeLa cells were cultured and divided into 3 groups: blank control group, cells transfected with nonsense siRNA (small interference RNA), and cells transfected with specific E6AP siRNA. The expressions of E6AP mRNA and protein were detected by RT-PCR and Western blot before and after the transfection respectively. Cell proliferation was determined by methylthiazolyl tetrazolium (MTT). The cell apoptosis index was assessed by flow cytometry.
  
  
  RESULTS
  Upon treatment with E6AP siRNA for 24, 48 and 72 h, the expression level of E6AP mRNA decreased 33%, 72% and 70% than siRNA treated group. The protein expression levels in 48 h and 72 h E6AP siRNA groups decreased 38%, 59% comparing with those of the nonsense siRNA treated group (P < 0.05). The proliferative capacity of cells transfectd with E6AP siRNA was significantly lower than blank control group (F = 101.38, P < 0.05) and siRNA treated group (F = 38.64, P < 0.05). The apoptosis index of HeLa cells treated with E6AP siRNA was significantly higher than that of the nonsense siRNA (F = 41.48, P < 0.05) and the blank control group (F = 86.36, P < 0.05).
  
  
  CONCLUSIONS
  SiRNA targeting can effectively suppress the expression levels of E6AP mRNA, corresponding with a proliferation inhibition and an enhanced apoptosis of HeLa cells.
authors.affiliation: Department of Gynecology and Obstetrics, Shengjing Hospital, China Medical University, Shenyang 110004, China.
authors.forename: Xiao-Xin
authors.initials: XX
authors.lastname: Xiu
authors.forename: Shu-Lan
authors.initials: SL
authors.lastname: Zhang
authors.forename: Xiao-Yun
authors.initials: XY
authors.lastname: Lu
authors.forename: Mei-Yan
authors.initials: MY
authors.lastname: Liang
authors.forename: Jun
authors.initials: J
authors.lastname: Yu
authors.forename: Jin-Ping
authors.initials: JP
authors.lastname: Hou
mesh_terms: D045744:Cell Line, Tumor; D049109:Cell Proliferation; D005260:Female; D015972:Gene Expression Regulation, Neoplastic / Q000235:genetics; D020868:Gene Silencing; D006367:HeLa Cells; D006801:Humans; D034622:RNA Interference; D034741:RNA, Small Interfering / Q000235:genetics / Q000494:pharmacology*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D044767:Ubiquitin-Protein Ligases / Q000037:antagonists & inhibitors / Q000378:metabolism*; D002583:Uterine Cervical Neoplasms / Q000235:genetics* / Q000378:metabolism*
chemical_list: D034741:RNA, Small Interfering; C471639:UBE3A protein, human; D044767:Ubiquitin-Protein Ligases