The DKK1 Knockout PaTu 8988t Polyclonal Cells product consists of a CRISPR/Cas9-edited polyclonal population derived from the human pancreatic ductal adenocarcinoma cell line PaTu 8988t, with disruption of the endogenous DKK1 gene leading to ablation of the secreted Dickkopf-1 protein. This polyclonal knockout pool provides a genetically diverse loss-of-function model that is particularly useful for interrogating DKK1-dependent regulation of Wnt/??-catenin signaling while avoiding the biases associated with single-cell clones.
The PaTu 8988t host cell line was established from a metastatic pancreatic adenocarcinoma and carries an activating KRAS G12V mutation that drives constitutive MAPK pathway signaling. As a well-characterized epithelial tumor model, it exhibits key hallmarks of advanced pancreatic cancer, including high invasive potential and resistance to apoptosis, thereby offering a clinically relevant background for studying the interplay between oncogenic KRAS and DKK1-mediated tumor suppression.
DKK1 functions as a secreted antagonist of canonical Wnt/??-catenin signaling by binding the co-receptors LRP5 and LRP6 together with Kremen1 and Kremen2, thereby preventing Wnt ligand?CFrizzled?CLRP5/6 complex formation. Knockout relieves this inhibition, allowing Wnt ligands such as WNT3A to activate the pathway, leading to DVL-mediated ??-catenin stabilization, nuclear accumulation, and TCF/LEF-driven transcription of targets including MYC, CCND1, and AXIN2. DKK1 expression is regulated by ??-catenin/TCF, TGF-??, p53, and HIF-1??.
In the PaTu 8988t environment, loss of DKK1 mimics the frequent epigenetic silencing of this gene in pancreatic tumors, leading to sustained Wnt/??-catenin activation that can cooperate with oncogenic KRAS to enhance proliferation, stemness, and metastatic capacity. The polyclonal nature of the knockout population avoids clonal adaptation artifacts and is well suited for pooled functional screens, long-term culture experiments, and studies of cellular heterogeneity. By removing this critical signaling brake, the model facilitates dissecting mechanisms of epithelial-mesenchymal transition and invasion.
Typical research applications include TOPFlash luciferase reporter assays, immunofluorescence detection of nuclear ??-catenin, and RT-qPCR profiling of Wnt targets such as MYC, CCND1, and AXIN2. The cells also support proliferation, transwell migration, and invasion assays, as well as RNA-seq-based transcriptomic comparisons. This model enables screening of Wnt inhibitors and DKK1-mimetic compounds, and can be used to explore Wnt?CMAPK pathway crosstalk. For additional technical information, please contact Ascent Research.
