DKK1 Knockout TE1 Polyclonal Cells consist of a heterogeneous population of TE1 esophageal squamous cell carcinoma cells engineered by CRISPR/Cas9-mediated disruption of the DKK1 gene, creating a versatile loss-of-function model for the secreted Wnt antagonist Dickkopf-1. This polyclonal knockout pool captures a range of editing events across the cell population, avoiding clonal selection biases and enabling robust interrogation of canonical Wnt pathway activation in a native esophageal cancer background.
The parental TE1 line, established from an esophageal squamous cell carcinoma biopsy of a Chinese male patient, grows as adherent epithelial-like cells and retains hallmark properties of esophageal malignancy. Integrating a DKK1 knockout into this well-characterized line provides a direct platform to evaluate how elimination of this critical Wnt inhibitor modulates oncogenic phenotypes such as proliferation, survival, and metastatic potential.
DKK1 functions by binding the LRP5/6 co-receptors and the Kremen1/2 transmembrane proteins, triggering endocytosis and degradation of the Wnt receptor complex. Without DKK1, Wnt ligands (e.g., Wnt3a) engage Frizzled and LRP5/6, leading to inactivation of the AXIN/APC/GSK3?? destruction complex, stabilization of ??-catenin, and nuclear translocation where ??-catenin/TCF complexes transcriptionally upregulate MYC, CCND1, and AXIN2. DKK1 is itself a target of ??-catenin/TCF, forming a negative feedback loop, and is also regulated by p53, BMP, and TNF-??, so its disruption results in sustained signaling.
In esophageal squamous cell carcinoma, epigenetic silencing or downregulation of DKK1 correlates with aggressive disease and poor clinical outcomes. This knockout model recapitulates the loss of Wnt pathway inhibition, enabling functional dissection of DKK1??s tumor-suppressive activities and systematic investigation of ??-catenin-driven transcriptional programs. Comparative studies with parental TE1 cells allow assessment of changes in clonogenic growth, directional migration, and sensitivity to Wnt-targeted therapeutics.
Key applications encompass mechanistic dissection of Wnt/??-catenin signal transduction, drug screening for inhibitors of downstream effectors, and metastasis assays. Supporting techniques include TOP/FOP luciferase reporter assays, Western blotting for ??-catenin, c-MYC, and Cyclin D1, RT-qPCR for AXIN2 and MYC, colony formation, transwell migration/invasion, immunofluorescence for ??-catenin nuclear localization, and RNA-seq. For further technical details or ordering information, please contact Ascent Research.
