DDHD1 Knockout Raji Polyclonal Cells constitute a CRISPR/Cas9-edited polyclonal knockout population of Raji B lymphoblastoid cells that harbor disruption in the DDHD1 gene. This loss-of-function model is designed to facilitate investigations into DDHD1 biology, a phospholipase A1 critically involved in lipid signaling and Golgi membrane dynamics. The polyclonal nature provides a heterogeneous pool of edited cells, enabling robust, physiologically relevant phenotypic analyses without clonal bias.
The parental Raji cell line is an EBV-positive Burkitt lymphoma-derived B lymphoblastoid line extensively used in immunology and oncology research. These cells exhibit a mature B lymphocyte phenotype with active secretory pathways and high demands for membrane biogenesis, making them an ideal system for studying phospholipid metabolism, organelle trafficking, and immune cell function. Raji cells endogenously express DDHD1 and are equipped with the molecular machinery for phosphatidic acid conversion and lysophosphatidic acid (LPA) signaling.
DDHD1 functions as a Golgi-localized phospholipase A1 that converts phosphatidic acid to the bioactive lipid mediator LPA. This enzymatic activity is under tight regulation by the small GTPase ARF1, phosphoinositide PI4P, and the COPI coatomer complex. DDHD1 directly interacts with ARF1, COPI subunits, and phosphoinositides, integrating into a signaling network that governs membrane curvature and vesicle budding. Downstream, LPA engages LPA receptors to activate pathways controlling cell proliferation, migration, and survival. Disruption of DDHD1 impairs this cascade, leading to Golgi morphological defects, aberrant membrane trafficking, and dysregulated lipid signaling, which underlie the pathogenesis of hereditary spastic paraplegia type 28 (SPG28) and neurodevelopmental disorders.
In the B lymphocyte context of Raji cells, DDHD1 knockout offers a unique model to interrogate the intersection of lipid signaling and immune cell biology. The polyclonal knockout cells can be used to assess how LPA production influences Golgi-dependent processes such as antibody secretion, cell adhesion, and chemotactic migration. Additionally, this model provides a platform to study the contribution of phospholipid metabolism to lymphomagenesis and immune dysregulation, thereby linking organelle homeostasis to hematological malignancy.
Researchers can utilize DDHD1 Knockout Raji Polyclonal Cells in a range of experimental applications. Lipid signaling studies may employ LC-MS quantification of LPA levels and phospholipase A1 activity assays to probe DDHD1 function. Immunofluorescence microscopy enables visualization of Golgi morphology alterations, while cell migration assays evaluate LPA-driven chemotaxis. Gene disruption can be confirmed via western blotting for DDHD1 protein and Sanger sequencing of the target locus. This model is particularly valuable for drug discovery targeting the LPA signaling axis in SPG28 and related neurological disorders. For detailed technical specifications or ordering, please contact Ascent Research.
