The DKK1 Knockout LoVo Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal population with targeted disruption of the DKK1 gene in the human LoVo colorectal adenocarcinoma cell line. This product provides a heterogeneous pool of knockout cells, enabling loss-of-function studies without clonal selection artifacts, and is ideally suited for investigating DKK1-dependent processes in a genetically defined cancer background.
The host LoVo cell line is an epithelial model derived from a metastatic supraclavicular lymph node of a 56-year-old male with colorectal adenocarcinoma. LoVo cells are characterized by microsatellite instability-high (MSI-H) due to MLH1 deficiency and harbor a KRAS G13D mutation. These features make LoVo a versatile system for studying colorectal cancer metastasis, drug resistance, and signal transduction, particularly in the context of Wnt pathway dysregulation.
DKK1 encodes a secreted glycoprotein that functions as a potent antagonist of canonical Wnt/??-catenin signaling. Mechanistically, DKK1 simultaneously binds the LRP5/6 co-receptors and the transmembrane proteins KREMEN1/KREMEN2, triggering internalization of LRP5/6 and preventing formation of the Wnt-Frizzled-LRP ternary complex. This blocks signal propagation through Dishevelled and the Axin/APC/GSK3?? destruction complex, leading to ??-catenin degradation and transcriptional repression of Wnt target genes such as MYC, CCND1, and AXIN2. DKK1 expression is regulated by upstream factors including Wnt3a, the ??-catenin/TCF complex, p53, TGF-??, and BMPs, integrating multiple signaling inputs.
In the LoVo host background, inactivation of DKK1 relieves tonic Wnt pathway inhibition, potentially enhancing ??-catenin stabilization and downstream transcription. Given the MSI-H status and KRAS G13D mutation, this model allows dissection of crosstalk between Wnt, TGF-??, and p53 pathways, which are frequently altered in colorectal cancer. DKK1 knockout LoVo cells are thus a valuable tool for studying tumor cell proliferation, migration, invasion, and metastatic colonization, especially in contexts where canonical Wnt signaling drives aggressive phenotypes.
Researchers can employ these polyclonal knockout cells in a wide range of applications, including TOP/FOP Flash luciferase reporter assays to gauge Wnt pathway activity, western blotting for ??-catenin stabilization, qRT-PCR profiling of Wnt target genes (e.g., MYC, CCND1), and DKK1 ELISA for secreted protein quantification. Additional assays such as LRP5/6 cell surface biotinylation, transwell migration/invasion, MTT viability, and co-immunoprecipitation of DKK1 with LRP6/KREMEN1 are highly applicable. This product is particularly useful for drug target validation, colorectal cancer tumorigenesis models, and bone metastasis research. For further technical details or to place an order, please contact Ascent Research.
