The GSK3A Knockout CAL-27 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal cell population with targeted disruption of the GSK3A gene in the CAL-27 human tongue squamous cell carcinoma cell line. This loss-of-function model is designed for investigating GSK3A-dependent signaling in oral cancer. The polyclonal format minimizes clonal bias and is suitable for bulk functional assays in cancer biology and signal transduction research.
The parental CAL-27 cell line is derived from a squamous cell carcinoma of the tongue and is widely used as an in vitro model for oral squamous cell carcinoma. CAL-27 cells retain key features of tongue tumorigenesis, including altered adhesion and invasiveness, making them ideal for exploring the molecular basis of oral cancer initiation, progression, and therapeutic resistance.
GSK3A encodes glycogen synthase kinase 3 alpha, a serine/threonine kinase that negatively regulates Wnt/??-catenin signaling. Within the destruction complex containing AXIN and APC, GSK3A phosphorylates ??-catenin, targeting it for proteasomal degradation. Wnt stimulation or AKT-mediated phosphorylation at Ser21 inhibits GSK3A, leading to ??-catenin stabilization, nuclear translocation, and TCF/LEF-mediated transcription of c-MYC and CYCLIN D1. GSK3A also phosphorylates glycogen synthase in insulin signaling and interacts with FRAT1 and GSKIP, integrating pathways such as PI3K/AKT, Hedgehog, and NF-??B.
In CAL-27 oral cancer cells, GSK3A knockout facilitates dissection of its role in Wnt-driven oncogenesis. Aberrant Wnt/??-catenin signaling is frequent in oral squamous cell carcinoma, contributing to epithelial-mesenchymal transition, stemness, and drug resistance. This model enables assessment of how loss of ??-catenin regulation impacts proliferation, migration, and apoptosis, and allows crosstalk studies with AKT-mediated survival pathways, supporting target validation and therapeutic development.
Validated applications include western blotting for total and phospho-Ser21 GSK3A, RT-qPCR for Wnt targets (c-MYC, CYCLIN D1), ??-catenin reporter assays (TOPFlash), immunofluorescence for ??-catenin localization, and flow cytometry for apoptosis (Annexin V/PI). Proliferation (MTT/EdU) and Transwell migration/invasion assays further characterize knockout phenotypes. This model is valuable for studying tumor microenvironment interactions and drug resistance mechanisms. For additional information or custom projects, contact Ascent Research.
