title: [Inhibition of mouse Lewis lung cancer via intravenous administration of recombinant mouse sFlt1 adenovirus].
abstract: BACKGROUND
  It has been known that the growth of solid tumors is dependent on angiogenesis, and neoangiogeneses of tumor become main target to control tumor growth. The aims of this study are to investigate the inhibition effect of replicate-deficient adenovirus encoding the soluble form of mouse vascular endothelial growth factor receptor 1 (sFlt1-Adv) on angiogenesis and tumor growth in established tumor model.
  
  
  METHODS
  Mouse Lewis lung cancer cells were inoculated subcutaneously into C57 mice. sFlt1-Adv, GFP-Adv and normal saline were injected twice intravenously after establishing Lewis cancer model. Diameters of tumors were measured every other day. Tumors were resected, weighed and fixed in 3% paraformadehyde. Microvessel density of tumors was determined by immunohistochemical staining with anti-CD31 antibody.
  
  
  RESULTS
  The planted tumor volume and weight in sFlt1-Adv group were significantly lower compared with the two controls (P < 0.01). Its inhibition rate was 71.8%. The microvessel density in sFlt1-Adv group decreased markedly compared with that of the control groups (P < 0.01).
  
  
  CONCLUSIONS
  sFlt1-Adv can inhibit the growth of tumor through the inhibition of tumor angiogenesis. sFlt1-Adv may be potentially valuable for clinical treatment of solid tumor.
authors.affiliation: State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R.China.
authors.forename: Bing
authors.initials: B
authors.lastname: Kan
authors.forename: Yu
authors.initials: Y
authors.lastname: Jiang
authors.forename: Jinliang
authors.initials: J
authors.lastname: Yang
authors.forename: Xiancheng
authors.initials: X
authors.lastname: Chen
authors.forename: Min
authors.initials: M
authors.lastname: Hu
authors.forename: Yuquan
authors.initials: Y
authors.lastname: Wei