AXIN1 Knockout HEK293T Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population in which the AXIN1 gene has been disrupted, creating a loss-of-function model for canonical Wnt/??-catenin signaling. Derived from the widely used HEK293T human embryonic kidney cell line, this heterogeneous cell population collectively abolishes AXIN1 scaffold function, providing a ready-to-use system for investigating constitutive pathway activation without reliance on exogenous Wnt ligands.
HEK293T cells are a human embryonic kidney epithelial line that stably expresses the SV40 large T antigen, enabling high-level episomal replication of plasmids containing the SV40 origin. This property has made them a preferred host for recombinant protein expression, lentiviral and retroviral production, and transient transfection studies. Their human origin, robust growth, and high transfection efficiency render them an ideal platform for mechanistic and drug discovery research.
AXIN1 functions as a critical scaffold and rate-limiting component of the ??-catenin destruction complex, essential for negative regulation of canonical Wnt/??-catenin signaling. It nucleates a multiprotein complex containing APC, GSK3??, CK1??, and ??-catenin, facilitating sequential phosphorylation of ??-catenin by CK1?? and GSK3??, which marks it for ubiquitination and proteasomal degradation. Additional interactions with DVL1, PP2A, SMAD3, and HIPK2 link AXIN1 to Wnt signalosome regulation and cross-talk with TGF-?? and Hippo pathways. Knockout of AXIN1 removes this critical control node, resulting in cytoplasmic stabilization and nuclear translocation of ??-catenin, where it partners with TCF/LEF factors to drive constitutive transcription of targets such as MYC, CCND1, and AXIN2.
In the HEK293T background, AXIN1 knockout generates a state of persistent ??-catenin signaling, recapitulating the oncogenic pathway activation observed in AXIN1-mutant malignancies including colorectal cancer, hepatocellular carcinoma, and medulloblastoma. This model isolates the function of the destruction complex independently of upstream receptor alterations, providing a defined system for probing ??-catenin regulation mechanisms, post-translational modifications, and small-molecule interventions that target the core complex.
These polyclonal knockout cells are engineered for a broad range of experimental applications, from detailed biochemical characterization to high-content screening. They are compatible with Western blotting to assess total and active ??-catenin, RT-qPCR for target gene expression analysis (e.g., AXIN2, MYC), TOP/FOP dual-luciferase reporter assays for TCF/LEF activity, co-immunoprecipitation to examine destruction complex integrity, immunofluorescence for ??-catenin nuclear localization, RNA-seq for global transcriptional profiling, and drug sensitivity assays with Wnt pathway inhibitors. For additional information or custom requirements, please contact Ascent Research.
