Antinucleolar antisera were produced in rabbits immunized with whole isolated nucleoli from normal rat liver and rat Novikoff hepatoma ascites cells. These antisera produced positive nucleolar fluorescence of varying degrees in nucleoli and nuclei of Novikoff tumor, rat liver, kidney, and Walker tumor cells. Novikoff hepatoma and liver antinucleolar antisera fixed complement when combined with ...

For an understanding of the molecular basis of the marked decrease in catalase activity of various tumor cells, expression of the catalase gene was studied in rat and human hepatoma cell lines and in rat liver, which was used as a control with high activity. RNA blot hybridization profiles and run-on assays indicated that the decrease in catalase activity was due to depression of catalase gene ...

Although cooperative interactions between growth factors and integrins, cell surface receptors for extracellular matrices (ECM), have been reported, little is known about the interaction between hepatocyte growth factor (HGF) and integrin in hepatoma cells. We investigated the effects and mechanisms of integrin on the proliferation of hepatoma cells regulated by HGF. Human HepG2 hepatoma cells ...

We have previously shown that BDS.1 rat hepatoma cells are hypersensitive to the antiproliferative effects of glucocorticoids, and secrete a glucocorticoid suppressible mitogenic activity (denoted GSM). Sodium dodecyl sulfate-polyacrylamide gel electrophoresis revealed that GSM purified to near homogeneity migrated as a 28-kDa protein under nonreducing conditions and as a single 15-kDa polypept...

The administration of t ryptophan or cortisone to rats bearing the Morris 5123 Hepatoma resulted in significant increases in t ryptophan pyrrolase activity in the host liver but in no change in the low tryptophan pyrrolase activity of the neoplasm. The repressed level of this enzyme in the neoplasm was not a result of the lack or excess of cofactors or enzymes necessary for the assay procedure ...

Adoptive transfer of spleen cells from specifically immunized donors to nonimmunized recipients was used to study tumor immunity in vivo to the syngeneic line 10 guinea pig hepatoma. Hepatoma cells cultured as monolayers on fibronectin-coated surfaces served as targets for immune splenocytes in a 3H release cytotoxicity assay in vitro. An antigenically distinct syngeneic guinea pig hepatoma (li...

Chrysin is a natural and biologically active flavonoid with anticancer effects. However, little is known about the adaptive response of cancer cells to chrysin. Chrysin reportedly has proteasome inhibitor activity. Previous studies demonstrated that proteasome inhibitors might induce endoplasmic reticulum (ER) stress response. In this study, we aimed to determine the effects of chrysin on hepat...

Hepatomas occurred in the liver of 5 of 386 ACT rats at the site of injection, 10—16weeks previously, of cells of regenerating liver pre-incubated with I)NA derived from the Morris hepatoma 3924C, transplantable in this strain. A tumor of undetermined nature developed in 1 of 62 rats 6 months after intrahepatic injection of a mixture of preneoplastic liver DNA and RNA. No tumors occurred in 1...

The gangliosides of human hepatoma biopsies, human hepatoma cell lines, and diethylnitrosamine-induced rat hepatomas were examined. These malignant tissues all expressed increased content of disialolactosylceramide (GD3) with respect to their normal counterparts. During the induction of rat hepatoma by diethylnitrosamine, an increase in GD3 levels appeared as early as 12 wk after initiation of ...

The content of cholesterol and cholesterol ester as well as the levels of acyl coenzyme A:cholesterol acyltransferase activity were determined in the microsomes from Morris hepatomas 7777, 5123D, and 7787. The free cholesterol content, expressed per mg microsomal protein, was significantly increased only in the microsomes from Morris hepatoma 7777 [47.8 +/- 0.4 micrograms (S.D.); p less than 0....