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Sequential Observation of Rat Prostate Lesion Development Induced by 3,2'-dimethyl-4-aminobiphenyl and Testosterone

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Specialty Oncology
Date 1993 Jan 1
PMID 8449822
Citations 6
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Abstract

3,2'-Dimethyl-4-aminobiphenyl (DMAB), when combined with high doses of testosterone propionate (TP) induces invasive adenocarcinomas with metastatic potential in the rat prostate. The processes underlying this tumor development, including the involvement of atypical hyperplasias, were sequentially investigated in F344 rats. DMAB was given subcutaneously at a dose of 50 mg/kg body weight 10 times at 2-week intervals. TP was administered chronically (in Silastic tubes) from the beginning of the experiment or after the DMAB administration until termination (week 60). Invasive adenocarcinomas were induced in the lateral and anterior prostate as well as the seminal vesicles. Atypical hyperplasias appeared from an early stage, with the later appearance of cancers being closely associated with such foci of morphological alteration. The findings confirm that combined administration of DMAB and pharmacological doses of TP yields invasive adenocarcinomas in the rat prostate and provide further support for the conclusion that atypical hyperplasias are premalignant lesions.

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