The AAGAB Knockout SK-HEP-1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from SK-HEP-1, a human liver adenocarcinoma cell line. This product provides a non-clonal gene disruption model, eliminating biases introduced by single-cell cloning while maintaining genetic heterogeneity for reproducible population-based analyses. Intended for advanced research into clathrin-mediated endocytosis, these cells enable the study of AAGAB-dependent processes in a hepatocellular carcinoma background.
The SK-HEP-1 parental line, isolated from ascitic fluid of a patient with liver adenocarcinoma, displays epithelial morphology and is widely used in hepatology and cancer research. Its hepatic origin offers a physiologically relevant environment to examine endocytic trafficking, receptor signaling, and drug responses, all of which are critical in liver tumor biology. This cell line expresses core endocytic machinery, making it an ideal host for investigating AAGAB knockout phenotypes.
AAGAB encodes a key adaptor-binding protein that regulates clathrin-mediated endocytosis by interacting with the alpha- and gamma-adaptin subunits of adaptor protein complexes, specifically AP1G1 and AP2A1, and clathrin heavy chain. Through these interactions, AAGAB promotes clathrin-coated vesicle assembly, facilitating internalization of receptors such as EGFR, transferrin receptor, and LDL receptor. Thus, AAGAB functions as a critical coordinator of endosomal trafficking and membrane protein sorting, directly impacting downstream signaling cascades.
In SK-HEP-1 cells, AAGAB disruption impairs clathrin-dependent endocytosis, leading to altered trafficking of key receptors and potential changes in signal transduction. Given the role of EGFR in liver cancer cell proliferation and migration, loss of AAGAB may modulate tumorigenic behaviors. Additionally, defective endocytosis can influence chemotherapeutic drug uptake, positioning this model for drug resistance studies. The link to punctate palmoplantar keratoderma type 1 further extends its utility to keratinocyte biology, though the liver background emphasizes tissue-specific roles.
Applications include transferrin and EGF uptake assays, co-immunoprecipitation of AP-2 complexes, immunofluorescence for clathrin and adaptins, and Western blotting to confirm AAGAB ablation. Functional studies can assess proliferation, migration, and invasion, while receptor internalization dynamics inform on endocytic efficiency. These polyclonal cells are suitable for screening drug uptake mechanisms, exploring resistance pathways, and modeling keratoderma-linked endocytic defects. Researchers may contact Ascent Research for additional details.
