The GSKIP Knockout HEK293T Polyclonal Cells represent a versatile CRISPR/Cas9-edited polyclonal knockout cell population designed for loss-of-function studies of the GSKIP gene. This product provides a mixed population of HEK293T cells harboring heterogeneous CRISPR/Cas9-mediated disruptions in the GSKIP locus, enabling robust analysis of GSKIP-dependent cellular functions without the clonal biases inherent in single-cell-derived lines. As a polyclonal knockout model, it captures the full spectrum of gene disruption events, offering a more population-representative tool for investigating GSKIP??s role in signal transduction and disease-relevant processes.
The parental HEK293T cell line is a widely utilized human embryonic kidney epithelial model, originally derived from HEK293 cells transformed with sheared adenovirus type 5 DNA and stably expressing the SV40 large T antigen. This genetic background confers high transfection efficiency and robust protein expression capacity, making HEK293T cells a preferred host for transient and stable gene manipulation, viral packaging, and CRISPR-based genome engineering. Their adherent growth, rapid doubling time, and well-characterized signaling networks provide an ideal platform for dissecting Wnt/??-catenin, insulin, and PI3K/Akt/mTOR pathways in a human cellular context.
GSKIP (GSK3B-interacting protein) directly binds and inhibits glycogen synthase kinase 3 beta (GSK3B). This interaction reduces ??-catenin phosphorylation at Ser33/37/Thr41, stabilizing ??-catenin and enabling TCF/LEF-dependent expression of cyclin D1 and c-Myc. GSKIP also interacts with the catalytic subunit of protein phosphatase 2A (PPP2CA), providing additional regulatory input. In the canonical Wnt pathway, GSK3B forms a destruction complex with Axin, APC, CK1, and ??-catenin, which is disrupted upon Wnt binding to Frizzled and LRP5/6 co-receptors via Dishevelled (Dvl). Insulin/PI3K/Akt signaling phosphorylates GSK3B at Ser9, intersecting with GSKIP to control glycogen synthase and IRS-1. Knockout of GSKIP removes this inhibition, causing hyperactive GSK3B, enhanced ??-catenin degradation, and diminished Wnt/??-catenin transcriptional output.
In HEK293T cells, which express Wnt pathway components and respond to Wnt ligands, GSKIP knockout markedly reduces ??-catenin stability and TopFlash reporter activity. This cellular environment supports dissection of crosstalk between Wnt/??-catenin and insulin/PI3K/Akt/mTOR pathways and GSK3B isoform-specific substrate regulation. With GSK3B dysregulation linked to cancer, Alzheimer??s, type 2 diabetes, and bipolar disorder, these polyclonal knockout cells provide a disease-relevant model for mechanistic studies and drug screening. The heterogeneous knockout population better mirrors in vivo diversity, aiding investigation of drug response variability and resistance.
These cells are suited for diverse functional assays, including western blotting for GSK3B and phospho-GSK3B (Ser9), ??-catenin stability measurements, and TopFlash luciferase reporter assays to quantify Wnt/??-catenin activity. Further applications encompass proliferation (MTT, BrdU), migration, and invasion assays, co-immunoprecipitation for GSKIP interactome mapping, and RNA-seq transcriptomic profiling. They support drug target validation and phenotypic screening in oncology and neurodegeneration research. For technical specifications and ordering, please contact Ascent Research.
