title: Nuclear inclusions and other ultrastructural aspects in the liver of animals treated with n-2-acetylaminofluorene.
abstract: In the course of two chronic experiments including the administration of N-2-acetylaminofluorene (N-A-AF) to male Wistar rats, alterations were observed in the fine structure of the nuclei isolated from the liver. After the first 3 to 4 months of ingestion of the carcinogen, the heterochromatin became uniformly distributed throughout the nucleus, with dissociation of the nucleolus-associated heterochromatin. At longer intervals (7 months) evidence was found in the nucleus of various types of inclusions, chiefly granular virus-like bodies. Subsequently, the frequency of inclusions diminished but the liver cell nucleus remained large, with numerous large nucleoli. This suggested the existence of a stage of metabolic activation of the liver cell nucleus in the course of experimental induction of hepatocarcinoma with N-A-AF, giving rise to an increase in the nuclear and nucleolar volume by accumulation of synthesis products and disorders in nucleo-cytoplasmic exchanges.
mesh_terms: D015073:2-Acetylaminofluorene / Q000494:pharmacology*; D000818:Animals; D002466:Cell Nucleolus / Q000648:ultrastructure; D002467:Cell Nucleus / Q000648:ultrastructure*; D005449:Fluorenes / Q000494:pharmacology*; D006570:Heterochromatin / Q000648:ultrastructure; D008099:Liver / Q000187:drug effects / Q000473:pathology*; D008113:Liver Neoplasms / Q000139:chemically induced; D008297:Male; D051381:Rats
chemical_list: D005449:Fluorenes; D006570:Heterochromatin; D015073:2-Acetylaminofluorene