The EIF2D Knockout A2780 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal cell population featuring disruption of the EIF2D gene in the A2780 human ovarian carcinoma cell line. This polyclonal knockout product enables loss-of-function studies of EIF2D, a key factor in cap-independent translation initiation, within a heterogeneous cell pool that retains genomic diversity. The CRISPR/Cas9-mediated gene disruption generates a knockout model suitable for investigating stress-responsive protein synthesis pathways.
The A2780 cell line, derived from an ovarian endometrioid adenocarcinoma, is a well-established epithelial ovarian cancer model widely used in translational oncology research. These cells exhibit responsiveness to endoplasmic reticulum (ER) stress and nutrient deprivation, making them particularly valuable for dissecting the integrated stress response (ISR). Their genetic background and signaling characteristics provide a relevant context for studying EIF2D function in ovarian cancer pathophysiology.
EIF2D (also known as ligatin) functions as a ribosome recruitment factor promoting cap-independent translation initiation on mRNAs with structured 5′ UTRs. It forms a complex with DENR and MCTS1, facilitating 40S ribosomal subunit binding and scanning at internal ribosome entry sites (IRES). EIF2D activity is modulated by upstream stress signals, including eIF2?? phosphorylation triggered by PERK and GCN2 kinases, and mTORC1-mediated signaling. Downstream, EIF2D regulates expression of stress-responsive transcription factors ATF4 and CHOP, and IRES-containing oncogenes such as c-MYC and VEGF. By integrating inputs from nutrient-sensing and stress pathways, EIF2D links translational control to cell survival decisions.
Disruption of EIF2D in A2780 cells abrogates cap-independent translation initiation, impairing stress-induced expression of ATF4 and CHOP. This knockout model disrupts the integrated stress response essential for cellular adaptation to ER stress and nutrient scarcity. In ovarian cancer, loss of EIF2D may sensitize cells to ER stress-inducing agents such as tunicamycin, alter apoptotic thresholds, and modulate therapeutic resistance pathways. These polyclonal knockout cells provide a powerful tool for elucidating how EIF2D-mediated translation influences tumor cell resilience and for evaluating ISR-targeted interventions in epithelial ovarian cancer.
Researchers can utilize this knockout model to investigate non-canonical translation mechanisms in ovarian cancer, identify stress-induced translation targets with techniques such as polysome profiling and RNA-seq, and evaluate the role of IRES-mediated translation in drug resistance. Representative assays include dual luciferase reporter assays for IRES activity, western blotting for ATF4 and CHOP induction, flow cytometry for stress markers, and cell viability assays under tunicamycin treatment. These cells are also suitable for apoptosis assays and multiparametric analysis of the integrated stress response. For detailed technical specifications or custom applications, please contact Ascent Research.
