EED Knockout HEK293 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from HEK293 cells, designed to disrupt the expression of the Embryonic Ectoderm Development (EED) gene. This polyclonal knockout pool provides a loss-of-function model for investigating Polycomb repressive complex 2 (PRC2) function without the constraints of clonal selection. By targeting the EED locus, this product enables the study of global epigenetic alterations, particularly the disruption of H3K27me3 maintenance and transcriptional derepression. The polyclonal nature preserves population-level heterogeneity, making it suitable for experiments requiring robust and reproducible knockout effects in a widely used epithelial cell background.
HEK293 cells are human embryonic kidney epithelial cells immortalized by sheared adenovirus type 5 DNA, serving as a classic model system for protein expression, signal transduction, and epigenetics research. Their epithelial origin and amenability to transfection make them ideal for studying chromatin regulation and gene silencing mechanisms. The HEK293 background supports high-efficiency CRISPR/Cas9 editing, allowing for effective disruption of target genes like EED. This host cell line is extensively characterized and widely adopted in cancer biology, developmental signaling, and pharmacological screening, providing a reliable platform for generating knockout polyclonal populations.
EED functions as a core subunit of PRC2, where it binds trimethylated lysine 27 on histone H3 (H3K27me3) and allosterically activates the methyltransferase activity of EZH2 (or EZH1). This feed-forward mechanism propagates the repressive histone mark, leading to chromatin compaction and gene silencing. EED operates within a multiprotein assembly that includes SUZ12, RBBP4/7, AEBP2, and JARID2. Upstream regulation involves JAK/STAT signaling through STAT3, Akt-mediated phosphorylation, and transcriptional control by MYC. Downstream targets encompass Hox genes, p16/INK4a, E-cadherin, and PTEN, underscoring its role in developmental gene regulation and tumor suppression. Disruption of EED dismantles PRC2 activity, resulting in loss of H3K27me3 and derepression of these critical loci.
In the HEK293 context, EED knockout produces profound epigenetic remodeling, making it a valuable model for dissecting PRC2-dependent repression in an epithelial cell environment. The loss of H3K27me3 leads to altered expression of genes involved in proliferation, adhesion, and differentiation, mimicking aspects of oncogenic transformation or developmental dysregulation. This polyclonal knockout system allows researchers to examine the interplay between Polycomb silencing and other signaling pathways active in HEK293 cells, such as those driven by growth factors or oncogenes. The model is particularly relevant for exploring how PRC2 disruption contributes to cancer epigenetics and for validating EED as a therapeutic target.
Researchers can employ EED Knockout HEK293 Polyclonal Cells in a wide range of assays, including Western blotting for EED, EZH2, and H3K27me3; ChIP-qPCR to quantify H3K27me3 occupancy at target promoters; RNA-seq for transcriptome-wide expression profiling; and immunofluorescence to visualize global epigenetic changes. The cells are suited for cell proliferation and colony formation assays, as well as drug screening campaigns aimed at identifying PRC2 inhibitors or synthetic lethal interactions. These applications support investigations in cancer epigenetics, stem cell biology, developmental gene regulation, and chromatin structure. For further details, please contact Ascent Research.
