The CAV1 Knockout SK-HEP-1 Polyclonal Cells constitute a CRISPR/Cas9-edited polyclonal knockout cell population with targeted disruption of the CAV1 gene encoding caveolin-1. Unlike monoclonal knockout lines, this heterogeneous pool maintains genetic diversity, enabling population-level studies of CAV1 function without single-cell cloning artifacts. The polyclonal format is particularly valuable for assessing functional variability and for applications requiring a representative mix of knockout genotypes.
SK-HEP-1 cells were originally isolated from the ascitic fluid of a 52-year-old male with liver adenocarcinoma and exhibit an epithelial phenotype with endothelial differentiation features. This cell line co-expresses hepatocyte and endothelial markers, making it a versatile model for hepatocellular carcinoma biology. The SK-HEP-1 background provides a clinically relevant context for exploring the dual tumor-suppressor and oncogenic roles of caveolin-1.
Caveolin-1 organizes caveolar membrane microdomains and scaffolds key signaling complexes. It directly interacts with eNOS, Src family kinases (Fyn, Yes), EGFR, and insulin receptor, modulating their catalytic activities. Upstream regulators including TGF-??, EGF, insulin-like growth factor-1, and p53 influence CAV1 expression, while downstream targets encompass Akt, ERK1/2, ??-catenin, and STAT3. Through these interactions, caveolin-1 governs caveolae-mediated endocytosis, integrin-mediated adhesion, focal adhesion kinase signaling, and cascades such as MAPK/ERK, PI3K/AKT, and Wnt/??-catenin, with context-dependent tumor-suppressive functions.
Ablation of CAV1 in SK-HEP-1 cells eliminates caveolae formation, disrupting organized signaling platforms. This loss relieves caveolin-1-mediated repression of integrin, TGF-??, and growth factor receptor pathways, likely enhancing proliferation and migration??phenotypes associated with hepatocellular carcinoma progression. The knockout model enables systematic dissection of caveolin-1??s tumor-suppressive mechanisms, including its influence on focal adhesion dynamics, endothelial-like functions, and cross-talk between integrin and growth factor signaling.
The polyclonal CAV1 knockout population supports diverse functional assays: caveolin-1-mediated endocytosis via albumin-FITC uptake; signal transduction analysis by phospho-western blotting for ERK1/2, Akt, and Smad2; cell migration and invasion using scratch-wound and Matrigel assays; and EGFR internalization by flow cytometry. Additional applications include cell cycle analysis with propidium iodide, annexin V apoptosis assays, and cholesterol distribution studies with filipin staining. This model is suitable for pathway-focused research, drug response profiling, and high-content screening in hepatocellular carcinoma. For further technical details, please contact Ascent Research.
