The NDEL1 Knockout Raji Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population derived from the human B lymphoblastoid Raji cell line. This loss-of-function model disrupts NDEL1, a scaffold protein crucial for dynein motor regulation and microtubule organization. The polyclonal format provides a heterogeneous pool of edited cells, minimizing clonal selection bias.
Raji is an EBV-transformed B lymphoblastoid line from a Burkitt lymphoma patient, widely used in immunology for antibody production, antigen presentation, and B-cell biology studies. Its stable karyotype and amenability to diverse assays make it an effective host for studying gene function in immune cells.
NDEL1 functions as a scaffold protein that couples the dynein motor complex to microtubules and cellular cargoes, thereby regulating neuronal migration, mitotic spindle orientation, and centrosome positioning. It acts downstream of the Reelin signaling pathway: Reelin binding to ApoER2/VLDLR receptors activates Dab1 and Src family kinases, leading to NDEL1 phosphorylation. Phosphorylation by CDK5 and Aurora A kinase modulates NDEL1??s interaction with LIS1 (PAFAH1B1) and the dynein-dynactin motor complex, influencing dynein activity, microtubule dynamics, and nuclear envelope positioning during mitosis. Additional interacting proteins include DISC1, 14-3-3, and the microtubule-severing enzyme katanin, placing NDEL1 at a hub of pathways associated with neurodevelopmental and psychiatric disorders.
In the Raji lymphocyte context, NDEL1 disruption provides a system to dissect its functions in immune cell biology, particularly in processes requiring microtubule-dependent transport, cell division, and antigen presentation. While NDEL1 is primarily studied in neurons, its expression in B cells implies conserved roles in mitotic spindle assembly and dynein-mediated organelle trafficking. Knockout in Raji cells may uncover phenotypes in proliferation, cytokine secretion, or immune synapse formation, and offers a platform to explore connections between NDEL1 signaling and lymphomagenesis.
Applications include immunofluorescence microscopy to visualize microtubule organization and centrosome positioning, flow cytometry for cell cycle profiling, and Western blotting to assess NDEL1 loss and pathway compensation. Co-immunoprecipitation with LIS1 or dynein intermediate chain and phospho-specific antibodies enable dissection of CDK5- and Aurora A-dependent signaling. Live-cell imaging and motility assays facilitate analysis of dynein-driven transport. This model is relevant for schizophrenia and lissencephaly research by studying conserved neuronal pathways in a tractable cell system, and for cancer biology investigating mitotic vulnerabilities. The polyclonal format is advantageous for pooled CRISPR screening and phenotypic characterization without clonal artifacts. For more information, contact Ascent Research.
