CTNNB1 Knockout Raji Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population in which the CTNNB1 gene has been disrupted in the human Raji B lymphoblast cell line. This polyclonal pool provides a heterogeneous loss-of-function model for investigating beta-catenin-dependent processes without the selection biases associated with clonal isolation. The product enables robust interrogation of CTNNB1 function in a lymphoid background, supporting studies in Wnt signaling, cell adhesion, and B-cell lymphomagenesis.
The Raji cell line is an EBV-positive Burkitt??s lymphoma-derived B lymphoblast line originally established from a pediatric patient. These cells exhibit features of mature B lymphocytes and are widely used in immunological research, including investigations of humoral immunity, antibody production, and B-cell malignancies. Their Epstein?CBarr virus (EBV)-transformed status provides a relevant background for examining oncogenic signaling pathways in lymphoproliferative disorders.
The CTNNB1 gene encodes beta-catenin, a dual-function protein that bridges cadherin-based adherens junctions and mediates transcriptional co-activation in the canonical Wnt pathway. In adhesion, beta-catenin binds E-cadherin and recruits alpha-catenin to link the actin cytoskeleton. Upon Wnt stimulation by Wnt3a through Frizzled and LRP5/6 co-receptors, the destruction complex comprising GSK3??, APC, Axin, and CK1?? is inhibited, stabilizing beta-catenin and facilitating its nuclear translocation. In the nucleus, beta-catenin interacts with TCF/LEF transcription factors and co-activators such as BCL9 and Pygopus to induce expression of target genes including MYC, CCND1, and AXIN2. CTNNB1 knockout eliminates beta-catenin, thereby dismantling cell adhesion complexes and abrogating Wnt-dependent gene transcription. Beta-catenin also interfaces with Hippo and TGF-beta signaling pathways, broadening its regulatory scope.
In the Raji B lymphoblast background, loss of beta-catenin is expected to alter proliferation, survival, and differentiation programs relevant to B-cell lymphoma biology. Aberrant Wnt signaling has been implicated in lymphomagenesis, and CTNNB1 knockout provides a platform to dissect the contribution of beta-catenin to B-cell malignancies. Disruption of adherens junctions may further impact cell?Ccell communication and tissue architecture, processes often dysregulated in lymphomas. This model thus enables mechanistic studies linking beta-catenin function to lymphoid pathophysiology.
This knockout model supports Wnt signaling dissection via luciferase reporter assays, target gene analysis by RT-qPCR and Western blotting, and protein interaction studies by co-immunoprecipitation. Functional assays such as cell proliferation and flow cytometry evaluate growth and survival phenotypes. The polyclonal nature enables unbiased assessment of knockout effects, making it ideal for drug screening campaigns against Wnt pathway inhibitors. In B-cell lymphoma research, this model allows investigation of beta-catenin??s role in pathogenesis and its interplay with EBV-driven transformation. Researchers interested in this model can contact Ascent Research for further information and custom services.
