The PCOLCE2 Knockout Raji Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the Raji B lymphocyte cell line. This product features targeted disruption of the PCOLCE2 gene, which encodes procollagen C-endopeptidase enhancer 2. The polyclonal pool contains a heterogeneous mixture of edited alleles, providing a physiologically relevant loss-of-function model without clonal selection artifacts. These cells are designed for studying PCOLCE2 function in a human B-cell context.
Raji cells are a suspension lymphoblastoid cell line originating from an Epstein-Barr virus (EBV)-positive Burkitt’s lymphoma patient. They retain key B-cell characteristics, including surface immunoglobulin expression and the capacity for robust proliferation in suspension culture. As a model for B lymphocyte biology, Raji cells are widely used in immunology and cancer research. Their EBV positivity renders them valuable for investigating viral-host interactions and lymphomagenesis. The suspension growth format facilitates scalable experimental workflows, including ECM-related assays.
PCOLCE2 encodes a secreted glycoprotein that enhances the proteolytic activity of bone morphogenetic protein 1 (BMP1) tolloid-like metalloproteinases, which cleave C-propeptides from procollagen molecules. This processing step is essential for collagen fibril assembly and extracellular matrix (ECM) maturation. In signaling networks, PCOLCE2 expression is regulated by transforming growth factor-beta (TGF-??) through SMAD2/3-dependent transcription, linking it to ECM organization and tissue remodeling pathways. BMP1, an interacting factor, collaborates with PCOLCE2 to process procollagens, while fibronectin and other ECM components interact with the resulting collagen fibrils. Downstream, PCOLCE2 influences collagen fibril formation, ECM remodeling, and cell adhesion protein deposition. Representative pathway components include TGFBR1, SMAD4, and matrix metalloproteinases (MMPs), positioning PCOLCE2 at the nexus of TGF-?? signaling and ECM structural maintenance.
In the Raji B-cell context, PCOLCE2 knockout disrupts collagen processing, potentially altering the composition and homeostasis of the pericellular ECM. B lymphocytes are integral to immune surveillance and can contribute to fibrotic and tumor microenvironments. Given Raji’s Burkitt’s lymphoma origin, loss of PCOLCE2 may impact B-cell adhesion, migration, and interaction with stromal components, making this model pertinent for cancer biology and immunology. The polyclonal nature of the knockout population mimics heterogeneous gene disruption seen in vivo, avoiding clonal bias while maintaining functional relevance for ECM-focused investigations.
This polyclonal knockout cell model enables detailed examination of collagen biosynthesis, TGF-?? signaling dynamics, and ECM organization in a B-cell lineage. Representative applications include Western blotting for collagen processing intermediates, RT-qPCR profiling of ECM gene expression changes, cell adhesion assays on collagen substrates, and collagen gel contraction studies to assess matrix remodeling capabilities. The system is well-suited for fibrosis research, tumor microenvironment analysis, and studies of connective tissue disorder mechanisms. For further technical details or to discuss custom applications, please contact Ascent Research.
