The EEA1 Knockout Huh-7 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the Huh-7 human hepatocellular carcinoma cell line. This product establishes a loss-of-function model for the EEA1 gene, enabling detailed investigation of early endosome dynamics and intracellular trafficking. The polyclonal format ensures a heterogeneous pool of edited cells, suitable for population-level analyses without the constraints of clonal selection.
Huh-7 cells are epithelial-like adherent cells established from a well-differentiated hepatocellular carcinoma. They retain key hepatic functional characteristics and are extensively utilized as a model for liver metabolism, carcinogenesis, and viral pathogenesis, particularly hepatitis C virus (HCV) infection and replication. Their robust growth and well-characterized signaling pathways make them an ideal host for studying endocytic processes.
EEA1 is a tethering factor on early endosomes, recruited by binding to Rab5:GTP and phosphatidylinositol 3-phosphate (PI3P) produced by VPS34 PI3-kinase. It dimerizes to bridge adjacent endosomes, driving homotypic fusion essential for maturation and cargo sorting. Internalized receptors and ligands are thus directed either toward recycling to the plasma membrane or degradation in late endosomes/lysosomes. EEA1 interacts with Rab5, Rabaptin-5, and Syntaxin 6, and operates downstream of PI3K and upstream of Rab7. Loss of EEA1 impairs endosome fusion, disrupting cargo trafficking and signal transduction from endocytosed receptors.
In the Huh-7 hepatocellular carcinoma context, EEA1-dependent endosomal trafficking intersects with pathways regulating proliferation, survival, and autophagy??processes often dysregulated in liver cancer. Huh-7 cells are also a well-established model for HCV entry, which relies on clathrin-mediated endocytosis and endosomal acidification. The EEA1 knockout population enables dissection of the specific requirement for early endosome fusion in viral internalization. Additionally, the polyclonal nature of the knockout cells mirrors the genetic heterogeneity found in tumors, providing a physiologically relevant system for investigating endocytic alterations in hepatocarcinogenesis.
Researchers can employ this model in diverse assays: transferrin uptake and recycling assays to measure endocytic kinetics, immunofluorescence and confocal microscopy to visualize endosome morphology, and co-immunoprecipitation with Rab5 to confirm disrupted interactions. Western blotting validates EEA1 protein depletion, while proliferation and apoptosis assays assess functional consequences in cancer biology. Further applications include autophagy flux analysis, drug delivery mechanism studies, and viral entry pathway investigations. For detailed product information or to discuss custom applications, please contact Ascent Research.
