The DKK1 Knockout HT29 Polyclonal Cells consist of a CRISPR/Cas9-edited polyclonal knockout cell population derived from the HT29 colorectal adenocarcinoma cell line, designed for functional loss-of-function studies of the human DKK1 gene. This polyclonal pool comprises a mixture of gene-disrupted cells, offering a versatile model to assess population-level responses to DKK1 ablation without the limitations of single-cell cloning.
The parental HT29 cell line, established from a primary colon adenocarcinoma of a 44-year-old female, is a well-characterized adherent intestinal epithelial model extensively utilized in cancer research and drug development. These cells carry mutations in APC and TP53, providing a relevant genetic background for investigating Wnt pathway dynamics and therapeutic interventions.
DKK1 is a secreted glycoprotein that antagonizes canonical Wnt/??-catenin signaling by binding to LRP5/6 co-receptors and recruiting Kremen1/2, leading to receptor internalization and signal inhibition. This blockade prevents ??-catenin stabilization and nuclear translocation, suppressing TCF/LEF-dependent transcription of proliferation-associated genes including c-MYC, CCND1, AXIN2, LEF1, and MMP7. DKK1 expression is regulated by p53, ??-catenin/TCF, vitamin D receptor, TGF-??, IL-1??, and TNF-??. In the knockout state, Wnt ligands such as Wnt3a can engage Frizzled/LRP5/6, activate Dishevelled, inhibit GSK-3??, and promote ??-catenin accumulation and TCF4/LEF1-mediated gene activation.
In HT29 colorectal adenocarcinoma cells, DKK1 knockout is anticipated to de-repress Wnt/??-catenin signaling, mimicking the pathway hyperactivity common in colorectal cancers. This model enables dissection of how loss of a key negative regulator influences tumor cell proliferation, survival, and differentiation. Researchers can directly monitor the upregulation of Wnt targets like c-MYC and CCND1 and explore crosstalk with TGF-??, NF-??B, and JNK pathways in a disease-relevant context.
This polyclonal knockout cell pool suits diverse phenotypic assays, including western blotting for ??-catenin and c-Myc, TOPFlash/FOPFlash reporter assays, RT-qPCR for AXIN2 and CCND1, and immunofluorescence for ??-catenin localization. Further functional analyses can encompass cell proliferation (MTS/WST-1), colonosphere formation, Transwell migration/invasion, apoptosis (Annexin V/PI), and RNA-seq transcriptomic profiling. For additional information or support, please contact Ascent Research.
