Abstract
Heterogenous rabbit antisera were prepared against microsomal proteins of hyperplastic hepatic nodules (HPN) induced by chemicals, and were utilized to assess the antigenic differences of microsomal polypeptides within a normal liver, HPN, and hepatocellular carcinomas (HCC), utilizing immunodetection of antigens separated electrophoretically and transferred to nitrocellulose. Although most antigens were common to all microsomes, differences (increase or decrease) were noted in some polypeptides not only between the normal liver and HPN, but also between HPN and HCC. On the other hand, monoclonal antibodies against epoxide hydrolase (EH), which was initially found as the PN antigen, reacted to a single polypeptide with a molecular weight of 49,000 in all the microsomes. These results suggested that there is little molecular modification of EH during hepatic carcinogenesis.
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