The EIF2AK2 Knockout Ca Ski Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population in which the EIF2AK2 gene, encoding the double-stranded RNA-activated protein kinase (PKR), has been disrupted. This loss-of-function model is generated in the Ca Ski host background and is provided as a polyclonal pool, enabling functional studies of PKR-dependent signaling without the confounding effects of clonal variation. The targeting strategy achieves gene disruption across the population, offering a robust tool for investigating the role of PKR in antiviral innate immunity, translational control, and stress response pathways.
Ca Ski cells are a human cervical squamous cell carcinoma line that contains an integrated HPV-16 genome and constitutively expresses the viral oncoproteins E6 and E7. This makes them a well-established carcinoma model for HPV-related research, particularly for studying virus?Chost interactions, oncogenic transformation, and the cellular response to viral infection. The presence of the HPV genome creates a physiologically relevant context in which to examine the intersection of viral immune evasion and host antiviral defenses, including those mediated by PKR.
PKR is a serine/threonine kinase activated by double-stranded RNA, interferons, PACT, and other stress signals such as tumor necrosis factor, lipopolysaccharide, and oxidative stress. Upon activation, PKR autophosphorylates and subsequently phosphorylates its primary substrate, eIF2??, leading to a global translational arrest that blocks viral replication. In addition, PKR functions upstream of I??B phosphorylation, promoting NF-??B nuclear translocation and the induction of interferon-stimulated genes. It also phosphorylates p38 MAPK and JNK, activating AP-1 transcription factors, and can trigger caspase-3-mediated apoptosis. PKR interacts with key regulatory proteins including PACT, TRBP, Hsp90, and viral antagonists such as HCV NS5A and Vaccinia E3L.
In the Ca Ski host cell background, the knockout of PKR provides a unique model to dissect how HPV-associated oncogenesis modulates innate immune signaling and stress responses. Since E6 and E7 proteins can subvert host defense mechanisms, the absence of PKR allows researchers to evaluate its specific contribution to translational control, apoptosis regulation, and NF-??B/MAPK pathway activity in the context of persistent HPV infection. This system is particularly valuable for identifying PKR-dependent mechanisms that may be exploited for therapeutic intervention in cervical cancer and other HPV-related malignancies.
This knockout product is suitable for a broad range of applications including antiviral innate immunity studies, translation regulation analysis, stress granule dynamics, apoptosis signaling, and cancer cell stress responses. Representative assays include Western blotting for phospho-eIF2?? and phospho-PKR, RT-qPCR for interferon-stimulated genes, immunofluorescence for stress granule formation, flow cytometry for apoptosis, co-immunoprecipitation for PKR interactions, and reporter assays for NF-??B or interferon-responsive elements. The EIF2AK2 Knockout Ca Ski Polyclonal Cells thus offer a versatile platform for both basic research and drug discovery screening targeting PKR-related pathways. For detailed technical specifications and ordering information, please contact Ascent Research.
