The NEDD4L Knockout Raji Polyclonal Cells represent a polyclonal pool of Raji B lymphocytes harboring CRISPR/Cas9-mediated disruption of the NEDD4L gene. This engineered cell population provides a loss-of-function model for investigating the roles of the NEDD4L-encoded E3 ubiquitin-protein ligase in B-cell biology. The polyclonal format ensures retained heterogeneity while abrogating NEDD4L expression, enabling studies in a genetically perturbed yet physiologically diverse cellular context. Researchers can utilize these cells to interrogate ubiquitin-dependent regulatory mechanisms without the constraints of single-cell clonal bias.
The Raji cell line, an EBV-positive B lymphoblastoid line derived from a Burkitt’s lymphoma patient, serves as an established model for B-cell malignancies and Epstein-Barr virus latency. These cells exhibit features of germinal center B cells and are widely employed in lymphoma research, immunology, and virology. The presence of latent EBV episomes and characteristic Burkitt’s lymphoma-associated phenotypes makes Raji cells a relevant platform for dissecting oncogenic signaling and virus-host interactions. The knockout is introduced into this well-characterized background, allowing direct assessment of NEDD4L function in a disease-relevant context.
NEDD4L (Neural precursor cell expressed developmentally down-regulated 4-like) is a HECT-type E3 ubiquitin ligase that ubiquitinates substrates, directing them for degradation or trafficking. It is activated by upstream regulators such as SGK1, AKT, and the TGF-?? receptor. Its targets include ENaC subunits, Smad2/3, and Dishevelled, thereby controlling sodium transport, TGF-?? signaling, and Wnt pathway activity. Interacting factors NDFIP1/2 and 14-3-3 proteins facilitate substrate recognition. NEDD4L thus integrates hormonal and growth factor signals to regulate endocytosis and autophagy.
In Raji B lymphocytes, disruption of NEDD4L is expected to perturb TGF-?? and Wnt signaling cascades, both of which influence lymphoma cell proliferation, survival, and differentiation. Unchecked TGF-?? signaling may alter Smad-dependent transcriptional programs, while aberrant Wnt/??-catenin activity could affect cell cycle progression. Additionally, NEDD4L knockout may impact ion channel regulation, potentially modifying membrane potential and calcium fluxes that are important for B-cell receptor signaling. The EBV-positive background raises the possibility that viral proteins such as LMP1 interact with NEDD4L-controlled pathways, making this model suitable for exploring oncogenic cooperation. Thus, these polyclonal knockout cells provide a tool to dissect NEDD4L??s tumor-suppressive or oncogenic roles in B-cell lymphomagenesis.
This polyclonal knockout population is suitable for functional studies, including high-throughput screening to identify modulators of NEDD4L-related phenotypes. Assays such as Western blotting, RT-qPCR for target genes, and flow cytometry characterize the knockout. Co-immunoprecipitation validates ubiquitination of substrates like Smad2/3. Cell proliferation (MTT) and apoptosis (Annexin V) assays measure growth and survival effects. TGF-?? reporter systems assess pathway activity. Drug sensitivity testing evaluates chemotherapeutic response alterations. For further information, contact Ascent Research.
