The EPN1 Knockout Raji Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal population designed to disrupt the EPN1 gene in the human Raji B lymphocyte background, creating a robust loss-of-function model for investigating Epsin-1 biology. This polyclonal knockout cell product enables researchers to study the functional consequences of EPN1 deletion without the need for single-cell cloning, offering a genetically heterogeneous pool that recapitulates population-level effects. By abolishing Epsin-1 expression, the cells provide a versatile tool to dissect clathrin-mediated endocytosis and its downstream signaling cascades in a lymphoma-relevant context, supporting a wide range of biomedical research applications.
The Raji host cell line is a well-characterized Epstein-Barr virus-positive Burkitt lymphoma B lymphocyte line that serves as an essential model for B cell receptor signaling, immune function, and lymphomagenesis. Derived from a patient with Burkitt lymphoma, Raji cells exhibit robust activation of survival pathways and are extensively employed in cancer biology, immunology, and drug development studies. Their B cell lineage makes them particularly suitable for exploring endocytic trafficking and signaling events that underlie B lymphocyte physiology and malignant transformation, providing a clinically relevant platform for functional genomics.
EPN1 encodes Epsin-1, an endocytic adaptor protein that orchestrates clathrin-mediated internalization of ubiquitinated membrane receptors through direct interactions with clathrin heavy chain, the AP-2 complex, and accessory factors such as Eps15. Epsin-1 binds ubiquitinated cargo via its ubiquitin-interacting motifs and engages phosphatidylinositol 4,5-bisphosphate at the plasma membrane, facilitating endocytic vesicle formation alongside dynamin. Upstream, Epsin-1 is regulated by Src kinase-mediated phosphorylation, HIF-1??-driven transcription under hypoxia, PI3K signaling, and deubiquitination by USP7, while it functions downstream of Cbl-mediated ubiquitination. Its ablation disrupts the internalization of key receptors, including Notch and VEGF receptors, thereby impairing Notch intracellular domain (NICD) nuclear translocation and attenuating Rho GTPase activation and VEGF receptor signaling. Additionally, Epsin-1 interacts with Dab2 and modulates actin cytoskeleton dynamics, positioning it as a central node in receptor-mediated endocytosis and signal transduction.
In the Raji B cell context, Epsin-1-mediated endocytosis likely governs the trafficking of surface receptors critical for lymphoma cell proliferation and survival, such as the B cell receptor and Notch family members. Disruption of EPN1 in this polyclonal knockout model enables the systematic interrogation of how Epsin-1-dependent internalization influences B cell receptor signaling, Notch pathway activation, and subsequent transcriptional programs. Given the role of Epsin-1 in oncogenic signaling, this cell population offers a valuable system to explore mechanisms of lymphomagenesis and identify vulnerabilities associated with endocytic dysregulation in B cell malignancies.
This knockout product is ideally suited for a diverse array of functional studies, including the analysis of clathrin-mediated endocytosis in B lymphocytes, investigation of Notch signaling in lymphoma, and functional dissection of Epsin-1 in B cell receptor trafficking and drug resistance. Typical assays include Western blotting, RT-qPCR, co-immunoprecipitation, flow cytometry, Notch reporter assays, confocal microscopy, and cell proliferation or apoptosis assays. The polyclonal format further facilitates pooled screening approaches and robust phenotypic characterization. For additional product details, technical support, or ordering information, please contact Ascent Research.
