[Histochemical appearance of gamma-glutamyltranspeptidase in the rat liver after transplacental exposure to diethylnitrosamine and postnatal administration of phenobarbital].

Phenobarbital administration during 7 weeks after partial hepatectomy is shown to be a sufficient promoting factor for induction of hyperplastic nodules in the rat liver initiated by the single DENA injection to pregnant rats. Histochemical distribution of gamma-glutamyltranspeptidase was a marker for identification of hyperplastic nodules.