The EIF2AK4 Knockout MES-OV Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population derived from the MES-OV human ovarian adenocarcinoma cell line. This product provides a loss-of-function model for EIF2AK4 (GCN2), a central kinase in the integrated stress response. The polyclonal format offers a genetically heterogeneous pool of cells with targeted disruption of EIF2AK4, suitable for population-level studies without clonal bias. It is designed for functional analysis of GCN2-dependent signaling in ovarian cancer.
MES-OV is an epithelial ovarian cancer cell line established from a malignant adenocarcinoma, representing a robust model for solid tumor biology. These cells are widely employed to explore oncogenic mechanisms, metabolic adaptation, and therapy resistance, particularly under nutrient stress. The knockout of EIF2AK4 in this background allows precise interrogation of stress-responsive pathways critical for tumor cell survival in the ovarian cancer microenvironment.
EIF2AK4 encodes GCN2, an eIF2?? kinase that senses amino acid deprivation via binding of uncharged tRNA to its histidyl-tRNA synthetase-like domain. Activation is also triggered by UV radiation and proteasome inhibition. GCN2 phosphorylates eIF2?? at Ser51, inhibiting global translation while selectively upregulating ATF4 translation. ATF4 drives transcription of genes including CHOP (DDIT3), GADD34 (PPP1R15A), and VEGF. Upstream regulators such as GCN1 and the ribosome modulate this pathway, linking nutrient availability to cellular stress adaptation.
In ovarian cancer, EIF2AK4 mediates adaptation to the nutrient-deprived tumor microenvironment, promoting survival under amino acid limitation. The MES-OV knockout model enables dissection of how GCN2 disruption affects malignant cell viability and stress signaling, providing insights into metabolic vulnerabilities. This system is valuable for studying the role of the integrated stress response in tumor progression and for identifying potential therapeutic targets in solid tumors.
Research applications include amino acid starvation experiments to evaluate GCN2 pathway activation, with readouts such as western blotting for phospho-eIF2?? (Ser51) and RT-qPCR for ATF4 and CHOP mRNA. Additional assays, including MTT viability and clonogenic survival under metabolic stress, quantify cellular responses. These approaches support investigations into tumor microenvironment stress responses, drug resistance, and metabolic adaptation. For additional information, please contact Ascent Research.
