The EIF2D Knockout NCI-H1975 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population derived from the human lung adenocarcinoma NCI-H1975 cell line. This product features targeted disruption of the EIF2D gene, which encodes a translation initiation factor central to alternative initiation mechanisms. The polyclonal format retains genetic heterogeneity, closely mimicking native cellular contexts and avoiding clonal biases. These cells provide a robust model for dissecting GTP-independent translation initiation and its contribution to oncogenic processes. They are supplied as a ready-to-use population for immediate application in molecular and cellular assays.
NCI-H1975 is an epithelial cell line established from a pleural effusion of a patient with non-small cell lung adenocarcinoma. It harbors the EGFR T790M mutation, which confers resistance to first-generation EGFR tyrosine kinase inhibitors. This genetic background makes the line a key model for studying drug resistance mechanisms and testing therapeutic strategies for EGFR-mutant lung cancer. The cells exhibit adherent growth and retain features of epithelial malignancy, including deregulated signaling pathways often associated with mTOR and integrated stress response pathways.
EIF2D functions as a GTP-independent translation initiation factor that recruits initiator tRNA to the 40S ribosomal subunit, enabling cap-independent translation of select mRNAs. It operates within the integrated stress response and mTOR signaling pathways. EIF2D activity is regulated upstream by mTORC1 and stress-sensing kinases such as GCN2 and PERK, which modulate eIF2?? phosphorylation. The factor interacts with eIF2 subunits, eIF5, and ribosomal particles to facilitate translation initiation. Downstream, EIF2D influences the expression of cell cycle regulators and apoptosis-related proteins, integrating stress and growth signals to control cellular fate.
In NCI-H1975 cells with EGFR T790M-driven oncogenic signaling, EIF2D knockout may perturb translation of stress-responsive and oncogenic mRNAs, potentially altering sensitivity to targeted therapies. This model allows investigation of how alternative initiation mechanisms contribute to adaptive resistance and tumor cell survival under therapeutic stress. The integration of mTOR and stress signaling with translation control positions this knockout pool as a tool for dissecting pathway crosstalk in lung adenocarcinoma. By disabling EIF2D, researchers can examine the role of non-canonical translation in proliferation, apoptosis, and drug response in a clinically relevant genetic background.
Research applications include polysome and ribosome profiling to map translation changes, western blotting for EIF2D and downstream targets, and cell viability assays to assess drug sensitivity. The cells are suitable for functional genomics screens, clonogenic survival studies, and flow cytometry-based apoptosis analysis. This product is valuable for investigating mechanisms of EGFR inhibitor resistance, translational dysregulation in cancer, and stress-induced protein synthesis. For further product details, technical protocols, or assistance in experimental design, please contact Ascent Research.
