Abstract
The glucuronic acid conjugate of N-hydroxy-4-aminobiphenyl was tested for carcinogenicity using a heterotopically transplanted rat urinary bladder (HTB) diverted from urine flow. A low-grade transitional cell carcinoma developed in 1 of 16 HTB and sarcomas surrounding the Ommaya reservoir connected to HTB in 8 of 16 rats. This unexpected high incidence of sarcomas, not previously observed in HTB-carcinogenesis model, suggested that the glucuronide conjugate of N-hydroxy-4-aminobiphenyl is a locally active carcinogen to mesenchymal cells.
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