title: [Therapeutic effects of small interfering RNA targeting MDM2 on human osteosarcoma cells].
abstract: OBJECTIVE
  To investigate the inhibitory effect of the small interfering RNA targeting mdm2 gene on the growth of osteosarcoma cells.
  
  
  METHODS
  PGCsilencerTM-mdm2 siRNA was constructed and transfected into the osteosarcoma cell line U2OS cells. The inhibitory effects on mdm2 were determined by RT-PCR and Western blot analysis. The cell growth activity was determined by MTT assay, and the cell apoptosis was examined by flow cytometry. The therapeutic effects of simdm2 was assessed on the nude mouse model of transplanted tumor.
  
  
  RESULTS
  The simdm2 plasmid was successfully constructed. After simdm2 being transfected into the U2OS cells, the expressions of mdm2 gene and protein were significantly inhibited. The ability of cell growth activity decreased greatly and cell apoptosis occurred apparently. There was no significant difference between the negative control group and non-transfected group. The growth of xenograft tumor in simdm2 transfected nude mice was inhibited and the expressions of mdm2 gene and protein were down-regulated remarkably.
  
  
  CONCLUSIONS
  siRNA targeting mdm2 gene inhibits the mdm2 expression in osteosarcoma U2OS cells and the growth of osteosarcoma in nude mice.
authors.affiliation: Department of Orthopedic Surgery, China-Japan Union Hospital of Jilin University, Changchun 130031, China.
authors.forename: Jia-Yin
authors.initials: JY
authors.lastname: Lü
authors.forename: Zhong-Li
authors.initials: ZL
authors.lastname: Gao
authors.forename: Jin-Cheng
authors.initials: JC
authors.lastname: Wang
authors.forename: Dan-Kai
authors.initials: DK
authors.lastname: Wu
authors.forename: Dong-Xu
authors.initials: DX
authors.lastname: Zhao
authors.forename: Duo-Duo
authors.initials: DD
authors.lastname: Zhang
authors.forename: Yan-Ying
authors.initials: YY
authors.lastname: Zhao
mesh_terms: D000818:Animals; D017209:Apoptosis; D001859:Bone Neoplasms / Q000378:metabolism / Q000473:pathology; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D005260:Female; D006801:Humans; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D009368:Neoplasm Transplantation; D012516:Osteosarcoma / Q000378:metabolism / Q000473:pathology*; D010957:Plasmids; D051736:Proto-Oncogene Proteins c-mdm2 / Q000235:genetics* / Q000378:metabolism; D034622:RNA Interference; D034741:RNA, Small Interfering / Q000235:genetics*; D014162:Transfection; D047368:Tumor Burden
chemical_list: D034741:RNA, Small Interfering; C497206:MDM2 protein, human; D051736:Proto-Oncogene Proteins c-mdm2