The GSN Knockout SK-HEP-1 Polyclonal Cells product is a CRISPR/Cas9-edited polyclonal knockout cell population engineered to disrupt the GSN gene in the SK-HEP-1 human liver adenocarcinoma cell line. This polyclonal population provides a heterogeneous knockout model for studying gelsolin function without selection of a single clonal isolate, preserving the genetic diversity inherent to the SK-HEP-1 background. The CRISPR/Cas9-mediated gene disruption targets the GSN locus, generating a loss-of-function model suitable for investigating gelsolin-dependent cytoskeletal and signaling processes.
SK-HEP-1 is a well-characterized liver adenocarcinoma cell line originally derived from ascitic fluid of a male patient with liver adenocarcinoma. This cell line exhibits both epithelial and endothelial features, making it a versatile host for studying liver cancer biology, cell adhesion, and transendothelial migration. Its established use in hepatocellular carcinoma (HCC) research, drug response assays, and metastasis studies provides a relevant cellular context for examining the impact of GSN knockout on cancer cell behavior.
GSN encodes gelsolin, a calcium- and phosphoinositide-regulated actin-binding protein that severs and caps filamentous actin (F-actin). Its activity is stimulated by Ca2? and inhibited by PIP2, while caspase-3 cleavage generates a constitutively active fragment during apoptosis. Upstream regulators include Src kinase and EGF, which modulate gelsolin phosphorylation. Gelsolin interacts with G-actin, F-actin, vinculin, and tropomyosin to coordinate actin dynamics. Through the Ca2?/PIP2 regulatory axis and caspase-3 cleavage, gelsolin governs actin reorganization essential for cell motility and apoptosis, and it is integrated into the PI3K/Akt cell survival pathway.
In SK-HEP-1 liver cancer cells, gelsolin-mediated actin remodeling is critical for lamellipodia formation, cell migration, and invasion. Disruption of GSN likely impairs F-actin turnover, causing aberrant cytoskeletal architecture and reduced motility. This model also allows dissection of gelsolin??s role in caspase-3-dependent apoptosis, where its cleavage can promote or inhibit cell death. As gelsolin is implicated in hepatocellular carcinoma progression and metastasis, these knockout cells are valuable for studying cytoskeleton-targeted therapies and gelsolin??s contribution to liver cancer pathology.
Typical applications include Western blotting and immunofluorescence with phalloidin to confirm gelsolin loss and visualize F-actin, Transwell assays to measure migration and invasion, and flow cytometry (Annexin V) to assess apoptosis. Co-immunoprecipitation can probe altered actin-binding interactions, while RT-qPCR verifies GSN disruption. These cells are suited for Rho GTPase activity assays, drug response profiling, and investigating the actin-apoptosis link in liver cancer. For custom services or technical support, please contact Ascent Research.
