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J Urol. 2009 Aug;182(2):749-55. doi: 10.1016/j.juro.2009.03.076. Epub 2009 Jun 18.

Novel invasive orthotopic bladder cancer model with high cathepsin B activity resembling human bladder cancer.

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  • 1Research Area, Institute of Oncology Angel H. Roffo, University of Buenos Aires, Buenos Aires, Argentina.

Abstract

PURPOSE:

We developed and characterized an orthotopic invasive bladder tumor model.

MATERIAL AND METHODS:

The MB49-I invasive bladder tumor cell line was obtained after 13 consecutive in vivo passages of primary tumor obtained by subcutaneous inoculation of MB49 bladder tumor cells in C57Bl/6J male mice.

RESULTS:

MB49-I tumor local invasiveness, tumor weight and spontaneous metastatic capacity were higher than in MB49 tumors. In MB49-I bladder tumors increased vimentin was observed, suggesting epithelial mesenchymal transition. In vitro the MB49-I cell line showed higher invasive properties associated with an increase in cathepsin B, metalloproteinase 9 and urokinase-type plasminogen activator proteolytic activities. Orthotopic bladder tumors induced by electrocautery of the bladder wall and subsequent instillation of MB49 and MB49-I bladder cancer cells generated superficial and invasive bladder tumors, respectively.

CONCLUSIONS:

The new murine bladder model described resembles human bladder disease, making it a useful tool for studying the molecular mechanisms of tumor progression and metastasis, and assaying antimetastatic and anti-invasive agents.

PMID:
19539312
[PubMed - indexed for MEDLINE]
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