title: [Construction of ERbeta expression vector and its function in different cancer cells].
abstract: OBJECTIVE
  To construct an ERbeta expression vector and study its expression and function in different cancer cells.
  
  
  METHODS
  Standard PCR was used to amplify the full-length coding sequence of ERbeta. The amplified ERbeta gene was cloned into the eukaryotic expression vector pCDNA3, generating pCDNA3-ERbeta. The ERbeta expression was detected by Western blot and in vitro translation. The biological activity of ERbeta was detected by transfecting the pCDNA3-ERbeta into SV40-transformed embryonic kidney cell line 293T,breast cancer cell lines MDA-MB-435, MDA-MB-436, SKBR3, and prostate cancer cell line PC-3, with reporters containing estrogen response elements.
  
  
  RESULTS
  The recombinant plasmid pCDNA3-ERbeta was confirmed by restriction analysis to contain the ERbeta gene. The 63 000 ERbeta expression was shown by Western blot and further confirmed by in vitro translation. The ERbeta expression in different cancer cells was demonstrated to stimulate the expression of the reporters containing estrogen response elements, ERE and C3.
  
  
  CONCLUSIONS
  ERbeta protein is successfully expressed and has biological activity, laying solid foundation for further study on its role in cancer cells.
authors.affiliation: Beijing Institute of Biotechnology, Beijing 100850, China.
authors.forename: Jian-hua
authors.initials: JH
authors.lastname: Zhu
authors.forename: Qi-nong
authors.initials: QN
authors.lastname: Ye
authors.forename: Ze-fei
authors.initials: ZF
authors.lastname: Jiang
authors.forename: Hong-jun
authors.initials: HJ
authors.lastname: Zhong
authors.forename: Jing-hua
authors.initials: JH
authors.lastname: Yan
authors.forename: Qiu-jun
authors.initials: QJ
authors.lastname: Lü
authors.forename: San-tai
authors.initials: ST
authors.lastname: Song
authors.forename: Cui-fen
authors.initials: CF
authors.lastname: Huang
mesh_terms: D001943:Breast Neoplasms / Q000378:metabolism* / Q000473:pathology; D002460:Cell Line; D045744:Cell Line, Tumor; D004622:Embryo, Mammalian; D004847:Epithelial Cells; D047629:Estrogen Receptor beta / Q000235:genetics* / Q000378:metabolism*; D005260:Female; D017930:Genes, Reporter / Q000235:genetics; D005822:Genetic Vectors; D006801:Humans; D007668:Kidney / Q000166:cytology*; D008297:Male; D010957:Plasmids; D011471:Prostatic Neoplasms / Q000378:metabolism / Q000473:pathology; D011994:Recombinant Proteins / Q000235:genetics / Q000378:metabolism; D020218:Response Elements / Q000235:genetics; D014162:Transfection
chemical_list: D047629:Estrogen Receptor beta; D011994:Recombinant Proteins