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Title of article :
The orthotopic Fischer/AY-27 rat bladder urothelial cell carcinoma model to test the efficacy of different apaziquone formulations
Author/Authors :
Arentsen، نويسنده , , Harm C. and Hendricksen، نويسنده , , Kees and Hulsbergen-van de Kaa، نويسنده , , Christina A. and Reddy، نويسنده , , Guru and Oosterwijk، نويسنده , , Egbert and Alfred Witjes، نويسنده , , J.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
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Abstract :
Objectives uone used intravesically showed significant activity in phase I and II marker lesion studies in non-muscle-invasive bladder cancer. The objective of this study was to assess antitumor activity and safety of 3 different formulations of intravesical apaziquone in an orthotopic rat bladder cancer model. als and methods Fischer F344 rats were instilled with 1.5 × 106 AY-27 urothelial cell carcinoma cells and divided in 3 treatment groups (n = 10) and 1 placebo group (n = 6). Intravesical treatment was administered for 1 hour on days 2 and 5. Rats were treated with apaziquone in the formulation used in phase I/II clinical trials (group 1); apaziquone with an altered buffering capacity being used in phase III clinical trials (group 2), and apaziquone as in group 2, but without propylene glycol in the diluent (group 3). On days 5 and 14, the bladder wall was inspected by cystoscopy and evaluated for macroscopic tumor growth. After sacrificing the rats (day 14), cystectomy was performed and the bladders were investigated. s were no signs of any toxicity due to the study drug. On histopathologic examination of the bladders 0, 1, and 2 tumors per group were found in group 1, 2, and 3, respectively. In the placebo-treated group, 60% of animals developed tumor, which is comparable to untreated animals. sions uone showed an excellent antitumor activity. The effectiveness of apaziquone in this orthotopic rat bladder tumor model corroborates the clinical observations and implies the validity of this model.
Keywords :
bladder neoplasms , rats , Apaziquone , Intravesical therapy , Urothelial cell carcinoma , Inbred F344
Journal title :
Urologic Oncology
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