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We applied restriction fragment length polymorphism (RFLP) analysis to 24 cases of renal cell carcinomas (RCC), 18 cases of prostate adenocarcinomas (PC), and 11 cases of transitional cell carcinomas (TCC) in the renal pelvis to study the oncogene amplification and inactivation of tumor suppressor genes. All of the cases showed no amplification nor gross rearrangements of the Harvey ras, c-myc, c-fos, c-myb, EGFR and PDGFR. In contrast, RFLP analyses demonstrated allelic losses interpreted as inactivational events of TSGs among the tumor forms studied. RCC had allelic losses on the short arm of chromosome 3 (3p) (68%), the long arm of chromosome 18 (18q) (33%), Y chromosome (29%), and 17p (27%) at high frequencies. PC showed frequent allelic losses on 16q (67%), 8p (50%), 18q (43%), 10p (40%), and 10q (38%). TCC had allelic losses on 17p (73%), 11p (64%), and 9p (40%). It was likely that the cases with the more malignant grade tumor had the more allelic losses.

ONCOGENE AMPLIFICATION AND INACTIVATION OF TUMOR SUPPRESSOR GENES IN UROLOGICAL MALIGNANT TUMORS