This product is a CRISPR/Cas9-edited polyclonal EIF2AK2 knockout cell population generated from the A2780 human ovarian carcinoma cell line. The polyclonal form consists of a heterogeneous pool of cells harboring various disruptions at the EIF2AK2 locus, avoiding clone-specific biases and providing a powerful loss-of-function model for studying PKR-dependent biology.
The A2780 cell line is an extensively characterized epithelial ovarian cancer model derived from an untreated patient. It is widely utilized in oncology research to dissect tumor cell proliferation, apoptosis, migration, and drug resistance mechanisms. Its ovarian carcinoma origin ensures relevance for exploring signaling networks that are frequently dysregulated in high-grade serous ovarian cancer.
EIF2AK2 encodes the double-stranded RNA (dsRNA)-activated protein kinase PKR, a central mediator of innate immunity and stress responses. Upon activation by dsRNA, interferons (IFN-??/??/??), or the protein activator PACT (PRKRA), PKR autophosphorylates and then phosphorylates the eukaryotic initiation factor 2 alpha (eIF2??) subunit. This phosphorylation event attenuates global protein synthesis while selectively enhancing translation of ATF4, which in turn induces CHOP (DDIT3) and other effectors of apoptosis and autophagy. PKR also propagates signals through IKK complex-mediated NF-??B activation, leading to pro-inflammatory cytokine production, and can engage the p38 MAPK and JNK pathways under stress conditions.
In the A2780 ovarian carcinoma background, PKR signaling integrates with various cellular processes that govern tumor cell fate. Disruption of EIF2AK2 enables systematic investigation of how PKR modulates the integrated stress response and inflammatory networks within ovarian cancer cells. This model is particularly valuable for assessing the contribution of PKR to chemoresistance, as PKR-mediated eIF2?? phosphorylation and downstream CHOP induction can shift the balance between survival and apoptosis in response to genotoxic drugs.
These polyclonal knockout cells are suited for a wide range of applications, including the study of antiviral innate immunity, stress-induced apoptosis, and inflammation. Representative techniques include western blot analysis of phospho-eIF2??, ATF4, and CHOP; RT-qPCR quantification of stress-responsive transcripts; immunofluorescence microscopy for PKR localization; flow cytometry-based apoptosis assays; and co-immunoprecipitation to detect PKR interactions with partners such as PACT and TRBP. The model further supports drug sensitivity profiling, genome-wide RNA sequencing, and phospho-signaling analyses to identify PKR-dependent vulnerabilities in ovarian cancer. For additional technical details or custom requests, please contact Ascent Research.
