The DSC2 Knockout Raji Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population derived from the Raji B lymphocyte line, featuring targeted disruption of the DSC2 gene. This model provides a robust loss-of-function system for studying desmocollin-2 (DSC2), a cadherin family member essential for calcium-dependent intercellular adhesion within desmosomes. By eliminating DSC2 expression, these cells allow investigation of its roles in hematopoietic context, including non-canonical adhesion functions beyond classical epithelial desmosomes.
The parental Raji cell line is an EBV-positive Burkitt’s lymphoma-derived human B lymphocyte model commonly used in immunology and oncology. As suspension cells, they exhibit robust growth and are capable of antibody production and antigen presentation. Their hematopoietic origin provides a distinctive platform for exploring DSC2-mediated adhesion pathways in immune cells, complementing traditional epithelial studies.
DSC2 encodes desmocollin-2, a desmosomal cadherin mediating calcium-dependent homophilic/heterophilic adhesion. It functions by interacting with armadillo proteins JUP and PKP2, which recruit DSP to anchor intermediate filaments such as KRT14, forming desmosomal junctions that regulate ??-catenin signaling. Upstream regulators include TP63, NOTCH1, calcium signaling, TGF-??, and retinoic acid; downstream effects involve modulation of JUP, DSP, PKP2, and Wnt/??-catenin components. Thus, DSC2 disruption destabilizes these complexes, enabling dissection of desmosome dynamics and adhesion-dependent signaling.
In the Raji lymphocyte background, the DSC2 knockout offers a unique tool to investigate non-epithelial functions of desmosomal proteins. Although desmosomes are classically associated with mechanical stress-bearing tissues, evidence indicates roles for cadherins in immune cell adhesion and signaling. This polyclonal population permits study of DSC2’s involvement in B cell homotypic aggregation, immune synapse formation, or lymphoma behavior. Additionally, it provides a convenient peripheral model for screening desmosomal adhesion modulators relevant to arrhythmogenic right ventricular cardiomyopathy and skin fragility disorders, without requiring primary cardiomyocytes or keratinocytes.
Key applications include functional DSC2 studies in lymphocytes, suspension cell adhesion assays (e.g., aggregation), and drug screening for desmosomal cadherin modulators. The polyclonal nature reflects diverse knockout genotypes, reducing clonal artifacts. Downstream assays such as RT-qPCR, Western blotting, flow cytometry, immunofluorescence, and co-immunoprecipitation facilitate validation and mechanistic analyses. This model also supports research into arrhythmogenic cardiomyopathy and Naxos disease mechanisms. For further information, contact Ascent Research.
