title: [Overexpression of S3 ribosomal protein gene is involved in drug resistance in K562/DOX cells].
abstract: OBJECTIVE
  To investigate the effect of overexpression of S3 ribosomal protein (S3rp) gene on the resistance of leukemia cell to antitumor drugs.
  
  
  METHODS
  Both sense and antisense cDNA recombinants of S3rp gene were constructed with pcDNA3.1 expression vector. Subsequently, the sense S3rp cDNA recombinant was transfected into K562 cells while the antisense one into K562/DOX cells (a multidrug resistant cell line). In addition, empty pcDNA3.1 vector was transfected into the corresponding cells as negative controls. The chemosensitivity of cells was evaluated by MTT assay.
  
  
  RESULTS
  Sense S3rp cDNA transfected K562 cells were 5.8 times more resistant to doxorubicin than control cells did, whereas antisense S3rp cDNA transfected K562/DOX cells were 3.2 times less resistant to doxorubicin than control cells did.
  
  
  CONCLUSIONS
  Overexpression of S3rp gene plays an important role in the development of drug resistance in K562/DOX cells.
authors.affiliation: Zhejiang Provincial Hospital of Traditional Chinese Medicine, Hangzhou 310006, China.
authors.forename: Ning-xi
authors.initials: NX
authors.lastname: Zhu
authors.forename: Shu
authors.initials: S
authors.lastname: Zheng
authors.forename: Rong-zhen
authors.initials: RZ
authors.lastname: Xu
authors.forename: Rong-xi
authors.initials: RX
authors.lastname: Yu
mesh_terms: D000903:Antibiotics, Antineoplastic / Q000494:pharmacology; D016373:DNA, Antisense / Q000235:genetics; D018076:DNA, Complementary / Q000235:genetics; D004317:Doxorubicin / Q000494:pharmacology; D019008:Drug Resistance, Neoplasm / Q000235:genetics*; D015870:Gene Expression; D006801:Humans; D020014:K562 Cells; D007938:Leukemia / Q000235:genetics* / Q000473:pathology; D010957:Plasmids / Q000235:genetics; D012269:Ribosomal Proteins / Q000096:biosynthesis / Q000235:genetics*; D014162:Transfection
chemical_list: D000903:Antibiotics, Antineoplastic; D016373:DNA, Antisense; D018076:DNA, Complementary; D012269:Ribosomal Proteins; C044152:ribosomal protein S3; D004317:Doxorubicin