title: [Effect of neferine combined with mdr-1shRNA on the expression of mdr-1/P-gp in K562/A02 cell line].
abstract: OBJECTIVE
  To determine the effect of neferine (Nef) combined with mdr-1shRNA on the expression of mdr/P-gp in K562/A02 cell line.
  
  
  METHODS
  MTT assay was used to observe the cell proliferation. The expression level of P-gp was determined by Western blot and the transcription of mdr-1 gene was detected by semi-quantitative RT-PCR.
  
  
  RESULTS
  After K562/A02 cells were treated by Nef or mdr-1shRNA alone or both for 24 h, the proliferation of K562/A02 cells was significantly higher in the Nef combined with mdr-1shRNA treatment group than that of Nef or mdr-1shRNA alone group (P<0.01).The expression of mdr-1/P-gp in the Nef with mdr-1 shRNA group was significantly lower than that of Nef or mdr-1shRNA alone group.
  
  
  CONCLUSIONS
  Nef enhances the inhibition of mdr-1shRNA expression vector on K562/A02 cell proliferation and on P-gp protein to effectively reverse multidrug resistance induced by mdr-1 gene encoding P-gp.
authors.affiliation: Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, China.
authors.forename: Qun
authors.initials: Q
authors.lastname: Qin
authors.forename: Xibin
authors.initials: X
authors.lastname: Xiao
authors.forename: Zhaoxia
authors.initials: Z
authors.lastname: Xie
mesh_terms: D018435:ATP Binding Cassette Transporter, Subfamily B; D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000235:genetics / Q000378:metabolism*; D044182:Benzylisoquinolines / Q000494:pharmacology*; D018432:Drug Resistance, Multiple / Q000187:drug effects; D019008:Drug Resistance, Neoplasm / Q000187:drug effects*; D004357:Drug Synergism; D004365:Drugs, Chinese Herbal / Q000494:pharmacology; D006801:Humans; D020014:K562 Cells; D034741:RNA, Small Interfering / Q000235:genetics / Q000494:pharmacology*
chemical_list: C513055:ABCB1 protein, human; D018435:ATP Binding Cassette Transporter, Subfamily B; D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D044182:Benzylisoquinolines; D004365:Drugs, Chinese Herbal; D034741:RNA, Small Interfering; C057222:neferine