The GNAO1 Knockout Raji Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from Raji human B lymphoblasts. CRISPR/Cas9-mediated gene disruption targets the GNAO1 locus, resulting in ablation of the G??o protein across a heterogeneous cell pool. This polyclonal format preserves natural genetic diversity and avoids clonal artifacts, providing a robust model for functional studies of GNAO1-dependent signaling in a B-cell context without single-cell cloning.
Raji cells are a suspension-adapted human Burkitt lymphoma line immortalized by Epstein-Barr virus, retaining key features of adaptive immunity such as antibody production and antigen presentation. Their rapid growth and genetic tractability have made them a staple in immunological and lymphoma research. Endogenous expression of chemokine receptors such as CXCR4, along with downstream signaling intermediaries, renders Raji cells particularly suitable for dissecting GPCR-mediated pathways in lymphocytes.
GNAO1 encodes the G??o subunit of heterotrimeric G proteins, which transduces signals from a variety of GPCRs, prominently including the chemokine receptor CXCR4 upon binding of CXCL12. Once activated, G??o inhibits adenylate cyclase, lowering intracellular cAMP and thereby reducing protein kinase A (PKA) activity. This cascade intersects with the MAPK/ERK pathway, as diminished cAMP relieves inhibitory constraints on Raf, permitting ERK1/2 phosphorylation. Additionally, G??o modulates ion channels, notably calcium channels, and directly interacts with G?¦? dimers, regulator of G protein signaling (RGS) proteins, and phosducin to fine-tune signal duration and intensity. Disruption of GNAO1 in the knockout cells eliminates this inhibitory control, leading to elevated cAMP, constitutive PKA activation, and altered ERK signaling dynamics, which can profoundly impact B-cell behavior.
Although GNAO1 mutations are classically associated with early infantile epileptic encephalopathy, neurodevelopmental disorder, and GNAO1-related movement disorder, emerging evidence indicates expression and potential functional roles of G??o in immune cells. The Raji polyclonal knockout model enables systematic investigation of G??o loss in a B-lymphocyte background, where cAMP governs critical processes including chemotaxis, proliferation, and antibody secretion. By disrupting G??o-mediated adenylate cyclase inhibition, this system reveals how dysregulated cAMP flux influences B-cell receptor signaling, transcriptional networks, and neuroimmune crosstalk, offering insights into both hematopoietic and neurological aspects of GNAO1 pathology.
This engineered cell population is amenable to a wide array of downstream analyses, including Western blotting for G??o, cAMP ELISA to quantify second messenger changes, transwell chemotaxis assays to assess migration toward CXCL12, flow cytometry for phospho-ERK and surface marker profiling, and transcriptomic approaches such as RNA-seq. Principal research applications encompass characterizing GPCR signaling in B-cell lymphoma, validating pharmacological modulators of G??o activity, examining chemokine-dependent homing mechanisms, and exploring the crosstalk between cAMP and MAPK/ERK pathways in an immunologically relevant context. For additional details or to discuss customized experimental designs, please contact Ascent Research.
