The DKK1 Knockout NCI-H1703 Polyclonal Cells product comprises a CRISPR/Cas9-edited polyclonal knockout cell population derived from the human lung squamous cell carcinoma line NCI-H1703. This loss-of-function model targets the DKK1 gene, which encodes a critical secreted antagonist of the Wnt/??-catenin signaling pathway. The polyclonal format offers a heterogeneous pool of edited cells, enabling robust analysis of DKK1 function without clonal selection biases. Researchers can utilize this population to dissect DKK1-dependent modulation of Wnt signaling cascades and downstream cellular phenotypes in a disease-relevant background.
The NCI-H1703 host cell line is an adherent epithelial line established from a primary lung squamous cell carcinoma. As a well-characterized model for non-small cell lung cancer, it retains key features of the tumor microenvironment and is widely employed in cancer biology research. Its derivation from a squamous carcinoma makes it particularly suitable for investigating mechanisms of tumor progression, metastasis, and therapeutic resistance relevant to this histological subtype. The line’s stable in vitro growth characteristics facilitate reproducible experimental setups, including long-term functional assays and drug response profiling.
DKK1 functions as a potent inhibitor of canonical Wnt signaling by binding to LRP5/6 co-receptors and Kremen proteins (KREMEN1/2), thereby preventing WNT3A?CFZD?CLRP5/6 complex formation and promoting receptor internalization. Knockout-mediated disruption of DKK1 removes this negative regulation, leading to ??-catenin stabilization, enhanced TCF/LEF-mediated transcription, and upregulation of target genes such as MYC, CCND1, and AXIN2. DKK1 expression is regulated by upstream factors including p53, the ??-catenin/TCF complex, SP1, TGF-??, BMP, and Wnt ligands themselves. Beyond the canonical pathway, DKK1 intersects with JNK and RhoA signaling, implicating it in planar cell polarity and cytoskeletal dynamics.
In the context of NCI-H1703 lung squamous cell carcinoma cells, DKK1 loss of function is predicted to amplify Wnt/??-catenin-driven transcriptional programs that govern proliferation, survival, and epithelial-mesenchymal transition (EMT). This knockout model thus provides a powerful tool for deciphering how unrestrained Wnt signaling contributes to tumor aggressiveness, metastatic dissemination, and resistance to conventional therapies. By comparing edited and parental cells, investigators can isolate DKK1-specific contributions to oncogenic phenotypes and identify synthetic vulnerabilities that may be exploited therapeutically.
The DKK1 Knockout NCI-H1703 Polyclonal Cells are suited for a broad range of research applications, including mechanistic studies of Wnt pathway activation, functional assays for cell proliferation (MTS, BrdU), migration and invasion (Transwell), and apoptosis (Annexin V). The product supports pathway interrogation via TOP/FOP flash reporter assays, western blotting for ??-catenin, c-MYC, and Cyclin D1, and RT-qPCR analysis of Wnt target genes (AXIN2, MYC). Additionally, the model is valuable for drug screening against Wnt inhibitors, chemoresistance investigations, biomarker validation, and co-immunoprecipitation studies of LRP6?CDKK1 interactions. For further information, please contact Ascent Research.
