The GSK3B Knockout Ca Ski Polyclonal Cells consist of a CRISPR/Cas9-edited polyclonal population of Ca Ski human cervical carcinoma cells with targeted disruption of GSK3B. This loss-of-function model was generated by a ribonucleoprotein approach, yielding a heterogeneous pool that circumvents clonal selection artifacts and is suitable for bulk population studies. The polyclonal format allows interrogation of GSK3B function within a genetically diverse cell background, reflecting the complexity of cancer cell populations.
The Ca Ski host cell line is an adherent epithelial line derived from a cervical carcinoma metastasis to the small intestine mucosa. It is positive for human papillomavirus type 16 (HPV16) and stably expresses the E6 and E7 oncoproteins, which inactivate p53 and retinoblastoma tumor suppressors. Ca Ski cells serve as an established model for HPV-driven cervical cancer metastasis, retaining anchorage-dependent growth and invasive properties.
GSK3B is a constitutively active serine/threonine kinase that acts as a key negative regulator of the Wnt/??-catenin pathway. In unstimulated cells, GSK3B forms a complex with AXIN, APC, and CK1 to phosphorylate ??-catenin, marking it for ubiquitin-mediated degradation. Wnt ligand engagement of Frizzled and LRP5/6 receptors recruits Dishevelled, which inhibits the destruction complex and stabilizes ??-catenin, enabling its nuclear translocation and TCF/LEF-dependent transcription. GSK3B is also inactivated by AKT/PKB-mediated phosphorylation downstream of PI3K/AKT and insulin signaling, and is modulated by PKA and PKC. Beyond ??-catenin, GSK3B substrates include glycogen synthase, c-Myc, cyclin D1, Snail, NFAT, and tau, thereby regulating glycogen metabolism, cell proliferation, differentiation, apoptosis, and EMT.
In cervical cancer, Wnt/??-catenin signaling is frequently aberrant, and GSK3B lies at the intersection of HPV oncoprotein activity and cellular proliferation/survival programs. The HPV16 E6/E7-expressing Ca Ski background creates a relevant setting in which GSK3B loss can be studied for its effects on ??-catenin accumulation, transcriptional activation, and downstream phenotypes. This polyclonal knockout model enables direct assessment of GSK3B??s contribution to cervical carcinoma cell growth, migration, invasion, and drug resistance, in a context that mimics metastatic disease.
This product is ideally suited for a variety of experimental approaches. Researchers can monitor Wnt pathway activity via ??-catenin/TCF luciferase reporter assays, validate changes in gene and protein expression by RT-qPCR and western blotting, and measure functional outcomes using proliferation, migration, and invasion assays. Apoptosis detection assays allow dissection of cell death mechanisms, while metabolic profiling can probe GSK3B??s role in energy homeostasis. These polyclonal knockout cells thus support investigations spanning cervical cancer biology, EMT, drug resistance, and signal transduction crosstalk. For additional details, please contact Ascent Research.
