title: Immunocytochemical localization of gamma-glutamyltransferase in induced hyperplastic nodules of rat liver.
abstract: The immunocytochemical localization of gamma-glutamyltransferase [(5-glutamyl)-peptide:amino-acid 5-glutamyltransferase, EC 2.3.2.2; gamma-GluTase] was demonstrated in hyperplastic liver induced by the carcinogen 2-acetylaminofluorene (2-AAF). The method used a specific antiserum and protein A-horseradish peroxidase and permitted visualization of antigenic sites at both the light and electron microscopic levels. Electron microscopy revealed deposits of 3,3'-diaminobenzidine (DAB) reaction product in the plasma membranes of (i) hyperplastic cells, (ii) bile canaliculi, (iii) endothelial cell membranes, and (iv) lymphocytes. The so-called ATPase activity was localized in the plasma membrane in bile canaliculi and in endothelial cells; the hyperplastic cells show marked variability in the levels of this activity.
mesh_terms: D015073:2-Acetylaminofluorene / Q000633:toxicity; D000217:Acyltransferases / Q000378:metabolism*; D000251:Adenosine Triphosphatases / Q000378:metabolism; D000818:Animals; D006651:Histocytochemistry; D006965:Hyperplasia / Q000201:enzymology; D007124:Immunoenzyme Techniques; D008099:Liver / Q000187:drug effects / Q000201:enzymology* / Q000473:pathology / Q000648:ultrastructure; D008297:Male; D008854:Microscopy, Electron; D051381:Rats; D011919:Rats, Inbred Strains; D011503:Transglutaminases
chemical_list: D015073:2-Acetylaminofluorene; D000217:Acyltransferases; D011503:Transglutaminases; D000251:Adenosine Triphosphatases