The NCS1 Knockout Raji Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population derived from human Raji B lymphoblasts, engineered to disrupt the NCS1 (neuronal calcium sensor 1) gene. This pooled polyclonal format provides a heterogeneous population of cells carrying NCS1 gene disruptions, enabling loss-of-function studies without the genetic homogeneity of a clonal cell line. The product is intended for advanced biomedical research applications focusing on calcium-dependent signaling and phosphoinositide metabolism in immune cells.
The host Raji cell line is an Epstein-Barr virus (EBV)-immortalized B lymphoblast line originating from a Burkitt??s lymphoma patient. Raji cells grow in suspension and are widely employed as a model system for B lymphocyte biology, including studies of antibody production, antigen processing and presentation, and immune surveillance. Their robust growth and well-characterized signaling pathways make them a practical platform for gene knockout analysis in a human B cell context.
NCS1 encodes a high-affinity calcium-binding sensor that, upon Ca2+ binding, directly interacts with and activates phosphatidylinositol 4-kinase beta (PI4KB), leading to the synthesis of phosphatidylinositol 4-phosphate (PI4P). This NCS1?CPI4KB?CPI4P axis is regulated by upstream signals such as B cell receptor stimulation, intracellular Ca2+ elevation, and CaMKII. Downstream, PI4P facilitates SNARE complex-mediated membrane trafficking, while the calcium/calcineurin pathway promotes NFAT nuclear translocation. NCS1 also associates with TRPV5 and IL1RAPL1, linking calcium homeostasis and synaptic organization.
In the Raji B cell background, NCS1 knockout is expected to disrupt the stimulus-dependent coupling between calcium mobilization and PI4P synthesis, impairing key lymphocyte functions. Given the central role of B cell receptor (BCR) signaling in triggering calcium influx and subsequent effector responses, loss of NCS1 may attenuate PI4KB-mediated phosphoinositide remodeling, thereby affecting vesicular trafficking of immune receptors and cytokines. This, in turn, could dampen downstream transcriptional programs, particularly NFAT-driven gene expression critical for B cell activation and proliferation. Consequently, this knockout model offers a tractable system to dissect the intersection of calcium sensing, lipid signaling, and immune cell regulation.
The NCS1 Knockout Raji Polyclonal Cells are suitable for a wide range of experimental approaches, including Western blotting, RT-qPCR analysis of NCS1 transcript levels, and functional assays such as calcium imaging with Fluo-4 to assess receptor-evoked Ca2+ dynamics. PI4P detection by immunofluorescence, flow cytometric profiling of B cell surface markers, and phospho-signaling analysis (e.g., phospho-AKT, phospho-ERK) can further delineate pathway perturbations. NFAT reporter assays and co-immunoprecipitation studies provide additional means to examine transcriptional and protein interaction outcomes. This knockout model supports investigations into neuropsychiatric disorders (schizophrenia, bipolar disorder) and certain cancers where NCS1 dysregulation is implicated, as well as drug target screening campaigns. For further technical information, please contact Ascent Research.
