Immunohistochemical and biochemical detection of uridine-diphosphate-glucuronyltransferase (UDP-GT) activity in putative preneoplastic liver foci

  • G. Fischer
  • D. Ullrich
  • N. Katz
  • K. W. Bock
  • A. Schauer


Preneoplastic liver foci were produced in female Wistar rats by the administration of 2-acetylaminofluorene (0.03% w/w) in the diet for 174 days. Increased UDP-glucuronyltransferase (UDP-GT) could be visualized immunohistochemically in the same focal areas which were ATPase-negative andγ-glutamyltranspeptidase-positive. Immunohistochemical detection was possible using rabbit anti-UDP-GT and peroxi-dase-labeled swine anti-rabbit immunoglobulins. The results of immuno-histochemistry were substantiated by enzyme determination in micro-dissected material. UDP-GT activity was 5-fold higher in focal areas in comparison with the surrounding liver tissue.

Increased UDP-GT activity in conjunction with the altered pattern of other drug-metabolizing enzymes is consistent with increased resistance of preneoplastic cells to the cytotoxicity of carcinogens. Immunohistochemical detection of UDP-GT may provide a new marker for preneoplastic lesions which, in conjunction with other markers, may prove useful in analyzing the various stages of liver carcinogenesis and the remodeling of preneoplastic lesions after cessation of carcinogenic stimuli.

Key words

Liver carcinogenesis 2-Acetylaminofluorene Preneoplasticfoci ATPase γ-Glutamyltranspeptidase UDP-glucuronyltransferase Immunohistochemistry Microdissection 


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Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • G. Fischer
    • 1
  • D. Ullrich
    • 2
  • N. Katz
    • 3
  • K. W. Bock
    • 2
  • A. Schauer
    • 1
  1. 1.Zentrum PathologieUniversität GöttingenGöttingen
  2. 2.Zentrum PharmakologieUniversität GöttingenGöttingen
  3. 3.Zentrum BiochemieUniversität GöttingenGöttingenFederal Republic of Germany

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