The IRF2 Knockout SK-HEP-1 Polyclonal Cells product is a CRISPR/Cas9-edited polyclonal knockout cell population with targeted disruption of the human IRF2 gene in the SK-HEP-1 hepatic endothelial cell line. This heterogeneous pool preserves endothelial population diversity and avoids clonal artifacts, providing a robust loss-of-function model for studying IRF2-dependent regulation within interferon signaling.
SK-HEP-1 is a widely used human hepatic sinusoidal endothelial cell line derived from a liver adenocarcinoma. It exhibits adherent, epithelial-like morphology and retains key endothelial characteristics, including the ability to form barriers and undergo angiogenesis. This cell line serves as an important model for investigating liver sinusoidal endothelial cell biology, vascular permeability, leukocyte?Cendothelium interactions, and the metastatic dissemination of cancer cells.
IRF2 is a transcriptional repressor that binds to interferon-stimulated response elements (ISREs), thereby antagonizing the activator IRF1. It is synthesized at basal levels and further induced by type I and II interferons (IFN-??/??/??) through JAK1/TYK2-mediated STAT1 phosphorylation. IRF2 participates in a negative feedback loop, limiting the duration of IFN signaling and maintaining cellular homeostasis. Key ISG targets repressed by IRF2 include MX1, OAS1, and IFIT1. Additionally, IRF2 interacts with co-repressors such as NCOR1 and with NF-??B and IRF4, integrating signals from innate immune and inflammatory pathways. Disruption of IRF2 relieves ISRE repression, causing constitutive derepression of ISGs and altered responsiveness to interferon stimulation.
In the SK-HEP-1 context, this knockout model is particularly valuable for examining the crosstalk between interferon signaling and endothelial function. The hepatic sinusoidal endothelium forms a dynamic barrier that controls macromolecule exchange and immune cell trafficking. Loss of IRF2 in these cells may sensitize them to inflammatory cytokines, modify barrier integrity, and influence angiogenic or metastatic behavior. This system therefore provides insights into hepatocellular carcinoma progression, viral hepatitis pathogenesis, and vascular inflammation.
This polyclonal knockout population supports a wide range of applications, including gene expression profiling by RT-qPCR and Western blot, ISRE-luciferase reporter assays, and chromatin immunoprecipitation. Endothelial-specific phenotypes are studied using permeability and tube formation assays, and flow cytometry. The model is applicable to co-cultures for transendothelial migration and screening interferon modulators. It serves investigations in cancer biology, antiviral immunity, and autoimmune diseases. For further information, contact Ascent Research.
