title: Tumor establishment features of orthotopic murine bladder cancer models.
abstract: OBJECTIVE
  Animal tumor models are important for the evaluation of novel therapeutic modalities. Since the initial report of an orthotopic bladder tumor model, several modifications have been proposed to improve the tumor take rate. Here we compared the HCl-pretreated and electrocauterization-pretreated orthotopic murine bladder tumor models.
  
  
  METHODS
  MBT-2 murine bladder cancer cells were transurethrally implanted in the bladder of syngeneic C3H/He mice. The mice were divided into three groups according to pretreatment methods (electrocautery, HCl, and control group) and were subjected to pretreatment before instillation of MBT-2 tumor cells into the bladder. Mice were sacrificed on day 21, and bladders were harvested, weighed, and examined histopathologically.
  
  
  RESULTS
  The tumor take rate of the control, electrocautery, and HCl groups was 0%, 54%, and 100%, respectively. The tumor take rate of the HCl group was significantly higher than that of the control group (p<0.01) and the electrocautery group (p=0.01). Pathologic reports revealed that all established bladder tumors were high-grade papillary urothelial carcinomas.
  
  
  CONCLUSIONS
  The HCl pretreatment model was a preferable murine bladder tumor model for evaluating further therapeutic interventions.
authors: Department of Urology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors: Jin Seok
authors: JS
authors: Lee
authors: Min Ho
authors: MH
authors: Bae
authors: Sung Ho
authors: SH
authors: Choi
authors: Sang Hun
authors: SH
authors: Lee
authors: Young Sam
authors: YS
authors: Cho
authors: Heung Jae
authors: HJ
authors: Park
authors: Chil Hun
authors: CH
authors: Kwon
authors: Kwan Joong
authors: KJ
authors: Joo