This product comprises a CRISPR/Cas9-edited polyclonal knockout cell population of Homo sapiens SK-HEP-1 cells, engineered for loss-of-function studies of the IQSEC1 gene. Employing a non-clonal polyclonal format, the cell pool harbors targeted disruptions introduced by CRISPR/Cas9-mediated gene editing, enabling the analysis of IQSEC1-dependent phenotypes in a genetically diverse population that avoids clonal selection bias. The knockout model is supplied as a ready-to-use research tool, allowing direct interrogation of IQSEC1-dependent signaling and cellular functions in a hepatic adenocarcinoma context.
The host cell line, SK-HEP-1, is a human hepatic adenocarcinoma line derived from the ascitic fluid of a patient with liver adenocarcinoma. Notable for its endothelial-like characteristics, this cell line combines features of both epithelial and endothelial lineages, making it uniquely suited for studying tumor cell plasticity and metastatic behavior. SK-HEP-1 cells are widely utilized in hepatocellular carcinoma research, particularly for investigating mechanisms of cell adhesion, migration, and integrin-mediated signaling that contribute to cancer progression.
IQSEC1 encodes a guanine nucleotide exchange factor (GEF) that specifically activates ARF6 by catalyzing GTP loading, thereby acting as a pivotal regulator of actin cytoskeleton dynamics and membrane trafficking. IQSEC1 activity is modulated by upstream signals from integrin receptors, growth factor receptors, and calcium/calmodulin binding, which facilitate its role in promoting ARF6-mediated RAC1 and PAK1 signaling cascades. Downstream, IQSEC1-dependent ARF6 activation influences actin polymerization through the PAK1?CLIMK?Ccofilin axis, and modulates integrin recycling necessary for cell motility. IQSEC1 also interacts with scaffold proteins such as PSD-95, the cytohesin CYTH2, and ??-arrestin, integrating membrane trafficking with signal transduction.
In the SK-HEP-1 background, disruption of IQSEC1 offers a powerful model to dissect its contribution to hepatocellular carcinoma metastasis. Given the cell line’s endothelial-like phenotype and metastatic origin, loss of IQSEC1 may alter ARF6-driven actin remodeling and integrin recycling, impairing cell migration and invasion. This model therefore enables detailed investigation of how IQSEC1 coordinates adhesive and migrative properties in liver cancer cells, and connectivity to intellectual disability-related mechanisms involving synaptic scaffolding proteins.
This polyclonal knockout population is suitable for diverse experimental applications, including ARF6 GTPase activation assays to measure GEF activity, transwell migration assays to quantify invasive potential, and immunofluorescence visualization of F-actin reorganization. Users can also perform co-immunoprecipitation to probe IQSEC1 interactions with ARF6 or calmodulin, and western blot analysis for phospho-PAK and phospho-cofilin as readouts of pathway activity. The model supports screening of small molecule modulators and genetic interaction partners in a hepatic cancer setting. For additional details or technical support, please contact Ascent Research.
