Characterization of a panel of cell lines derived from urothelial neoplasms: genetic alterations, growth in vivo and the relationship of adenoviral mediated gene transfer to coxsackie adenovirus receptor expression.

PURPOSE: Cell lines have become an essential component for the investigation of cancer. We have developed a panel of cell lines derived from human urothelial cancers and we describe some of their important characteristics.
MATERIALS AND METHODS: Ten human urothelial cancer cell lines were characterized by their growth in athymic nude mice, CAR expression and their susceptibility to adenoviral mediated transfer of the green fluorescence protein gene. TP53 mutation status and immunochemical analysis of p53, pRB and p16 were also examined.
RESULTS: Five cell lines rapidly produced tumors in athymic nude mice. Two cell lines produced tumors in 1 month, 1 produced them in 3 months and 2 were nontumorigenic. The cell lines varied in CAR expression and in their susceptibility to adenoviral mediated gene transduction. There was no direct correlation between CAR expression and susceptibility to adenoviral mediated gene transduction. Seven cell lines had TP53 mutations, of which 2 had large deletions and did not express p53 protein by immunostaining. All cell lines expressed abnormal pRB by immunochemical analysis (3 had no staining and 7 had homogenously strong staining) and 8 did not express p16 (7 showed homogeneously strong pRB staining).
CONCLUSIONS: Our panel of 10 human urothelial cell lines differed in genetic alterations, growth in nude mice, susceptibility to adenoviral mediated gene transduction, and expression of p53, p16 and pRB. The availability of various urothelial cancer cell lines with differing genotypic and phenotypic features will facilitate further research into bladder cancer.