Hep-74.3A Cells

The Hep-74.3 hepatoma cell line is derived from a mouse liver tumor, specifically from the C3H/He mouse strain. This cell line is characterized by its hepatocytic origin, confirmed through intermediate filament protein analysis. Hep-74.3 expresses simple keratins K8 and K18, which are typical of normal liver cells, as well as vimentin and keratin K19 to varying degrees. These protein patterns confirm the hepatocytic nature of the cell line and its classification as a hepatoma line.

The Hep-74.3 cell line displays a predominantly epithelial morphology, reflecting its origin from hepatocytes. This morphological phenotype is consistent with its protein expression profile. DNA fingerprint analysis of Hep-74.3 did not reveal any major structural abnormalities, indicating a degree of genomic stability. However, some changes in the relative intensities of specific bands were observed with increasing passage numbers, suggesting minor genomic variability over extended culture periods.

Despite the absence of detectable p53 mutations in the primary mouse liver tumors, aberrations were found in some hepatoma lines during in vitro propagation. The Hep-74.3 cell line was analyzed for mutations in the p53 and c-Ha-ras genes. The absence of detectable mutations in the p53 gene in this line during early passages suggests a stable genetic background. This cell line serves as a valuable model for studying hepatocellular carcinoma, providing insights into the cellular and molecular mechanisms underlying liver tumorigenesis.