The EIF2D Knockout Raji Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population in which the gene encoding the eukaryotic translation initiation factor 2D (EIF2D) has been disrupted. This product provides a loss-of-function model of a critical cap-independent translation initiation factor, enabling researchers to dissect EIF2D-dependent mechanisms in a human B lymphocyte background. The polyclonal knockout format offers a heterogeneous gene-disrupted pool that can serve as a foundation for functional studies, screening applications, and pooled assays, without requiring single-cell clonal isolation. As a polyclonal population, it avoids the limitations of clonal variation while maintaining robust target-gene disruption across the bulk cell culture.
The Raji host cell line is an EBV-positive human Burkitt lymphoma B lymphocyte line harboring a MYC translocation. Raji cells display malignant B-cell features such as antibody production and antigen presentation, with growth driven by aberrant signaling networks. The EBV latency program utilizes cap-independent translation to regulate viral and host gene expression, offering a valuable model to examine translational mechanisms in lymphoma and humoral immunity.
EIF2D functions as a cap-independent translation initiation factor that recruits the 40S ribosomal subunit to IRES-containing mRNAs, enabling protein synthesis under stress. It is regulated by mTORC1 (via eIF4E/4E-BP1) and PERK-mediated eIF2?? phosphorylation. Through interactions with eIF3, eIF5B, and PABPC1, EIF2D facilitates ribosome loading on targets like MYC, XIAP, BCL2, and VEGF, linking stress-responsive translation to cell survival and proliferation.
In the Raji lymphoma context, disruption of EIF2D is expected to selectively impair the translation of IRES-dependent mRNAs that support the malignant phenotype, particularly those driving the MYC transcriptional program and apoptosis resistance. Because Raji cells rely on high MYC protein levels sustained by both cap-dependent and cap-independent mechanisms, EIF2D knockout can reveal vulnerabilities in the translational circuitry of Burkitt lymphoma. The knockout model may also attenuate the cellular response to endoplasmic reticulum stress and nutrient deprivation, thereby providing a tool to probe how B-cell lymphomas adapt to adverse microenvironments. Furthermore, given the interaction with EBV-driven translation control, this model enables investigation of host factors that influence viral latency and oncogenesis.
Researchers can employ this polyclonal knockout cell population in a variety of advanced applications, including identification of IRES-dependent mRNAs by polysome profiling or ribosome footprinting (Ribo-seq), interrogation of MYC translation dynamics using dual-luciferase IRES reporters, and analysis of stress responses via thapsigargin treatment followed by Western blotting and RT-qPCR. The cells are amenable to functional studies assessing proliferation (MTS assay), apoptosis (flow cytometry for annexin V), and transcriptome-wide changes (RNA-seq). They also serve as a platform for evaluating EIF2D as a therapeutic target in B-cell malignancies. For further details, please contact Ascent Research.
