Biologic and morphologic characteristics of hepatocellular lesions in BALB/c female mice fed 2-acetylaminofluorene.
2-Acetylsaminofluorene (2-AAF) induced foci of hepatocellular alterations, hepatocellular adenomas, and hepatocellular carcinomas in BALB/c female mice. The incidence of basophilic cell foci decreased with high dose levels of 2-AAF, and the incidence of hepatocellular adenomas decreased with both high dose levels and length of administration of 2-AAF. The results suggest that the hepatocellular foci of cellular alteration may give rise to the hepatocellular adenomas which in turn may give rise to hepatocellular carcinomas. The study also suggests that both hepatocellular adenomas and carcinomas may develop de novo. Hepatocellular carcinomas rarely metastasized before 18 months, and the less differentiated hepatocellular carcinomas were more likely to metastasize. 2-AAF did not alter the incidence of spontaneous hemangiosarcomas.
D015073:2-Acetylaminofluorene / Q000633:toxicity*; D000818:Animals; D005260:Female; D008114:Liver Neoplasms, Experimental / Q000139:chemically induced / Q000473:pathology* / Q000648:ultrastructure; D051379:Mice; D008807:Mice, Inbred BALB C; D013997:Time Factors
D015073:2-Acetylaminofluorene