The IQGAP1 Knockout SK-HEP-1 Polyclonal Cells product comprises a heterogeneous population of SK-HEP-1 cells engineered with CRISPR/Cas9-mediated gene disruption to ablate functional IQGAP1 expression. This polyclonal knockout cell population retains the genetic heterogeneity inherent to the parental line while eliminating wild-type IQGAP1 protein production, providing a robust loss-of-function model for investigating scaffold protein functions in liver adenocarcinoma biology. The pooled format minimizes clonal artifacts and is ideal for studies requiring population-level analyses of cytoskeletal and adhesion dynamics without the selection pressure of single-cell cloning.
SK-HEP-1 is a widely used human hepatic adenocarcinoma cell line originally isolated from the ascitic fluid of a patient with liver adenocarcinoma. It exhibits a poorly differentiated phenotype with concurrent epithelial and mesenchymal features, reflecting a high degree of epithelial-mesenchymal plasticity. This unique characteristic makes SK-HEP-1 a valuable model for studying the metastatic progression of hepatocellular carcinoma, particularly the dynamic transition between adherent, epithelial states and migratory, mesenchymal phenotypes that drive tumor dissemination.
IQGAP1 encodes a multi-domain scaffold protein coordinating actin cytoskeleton organization, cell-cell adhesion, and signal transduction. It directly interacts with filamentous actin, calmodulin, Rac1, Cdc42, and adherens junction components E-cadherin and ??-catenin. IQGAP1 functions downstream of EGF and HGF receptors and integrin-mediated adhesion, modulating MAPK/ERK signaling and ??-catenin transcriptional activity. By scaffolding CLIP-170 and APC, IQGAP1 also links microtubule dynamics to cortical actin. Calcium/calmodulin and Wnt ligands serve as upstream regulators, integrating IQGAP1 into calcium and Wnt/??-catenin pathways, while its regulation of Rho GTPase activity positions it at a nexus controlling actin polymerization, focal adhesion turnover, and migration.
In the SK-HEP-1 background, abrogation of IQGAP1 disrupts the delicate balance between cell-matrix adhesion and actin-driven motility that underpins the metastatic phenotype. Loss of IQGAP1 impairs the recruitment of actin-regulatory proteins to adherens junctions and focal adhesions, leading to defective cell spreading, reduced migration velocity, and attenuated invasive capacity. The polyclonal knockout population recapitulates the heterogeneous nature of tumor cell populations in vivo, allowing researchers to study how IQGAP1 loss influences collective tumor cell behavior, including proliferation changes and responses to pro-migratory stimuli such as HGF. This model is particularly suited for dissecting the molecular mechanisms linking scaffold protein dysfunction to the acquisition of metastatic traits in hepatocellular carcinoma.
This knockout tool supports hepatocellular carcinoma research applications including quantitative Western blotting for IQGAP1 depletion verification, Boyden chamber and wound-healing migration/invasion assays, and adhesion assays on extracellular matrix substrates. Immunofluorescence microscopy can visualize actin stress fibers, E-cadherin junctions, and focal adhesions. Rho GTPase activity pull-down assays and proliferation measurements (e.g., EdU incorporation) provide mechanistic insights into cytoskeletal and growth signaling rewiring. The polyclonal format is suitable for anti-metastatic drug screening and 3D tumor spheroid studies. For additional technical details or customized inquiries, please contact Ascent Research.
