This product comprises a CRISPR/Cas9-edited polyclonal knockout cell population derived from the A-549 human lung epithelial carcinoma cell line, designed for targeted disruption of the GSKIP gene. As a heterogeneous batch of edited cells, this polyclonal format provides a versatile loss-of-function model for studying GSKIP-dependent signaling without the constraints of clonal selection. The use of CRISPR/Cas9 technology ensures efficient gene ablation, enabling researchers to dissect the contributions of GSKIP to cellular processes in a widely used lung adenocarcinoma background.
The A-549 cell line was originally isolated from the lung tissue of a 58-year-old Caucasian male with adenocarcinoma and serves as a well-characterized model for pulmonary alveolar epithelium and non-small cell lung cancer. These cells retain key features of epithelial carcinoma, including adherent growth and the capacity to form tumors in xenograft models, making them a standard substrate for investigating oncogenic mechanisms and therapeutic responses.
GSKIP (GSK3??-interacting protein) functions as an A-kinase anchoring protein (AKAP) that scaffolds protein kinase A (PKA) and glycogen synthase kinase 3?? (GSK3??). Through this scaffolding, PKA phosphorylates GSK3?? at Ser9, inhibiting its kinase activity and preventing the phosphorylation-dependent degradation of ??-catenin. Stabilized ??-catenin translocates to the nucleus and complexes with TCF/LEF transcription factors to drive expression of Wnt target genes such as Cyclin D1, c-Myc, and Axin2. The GSKIP interactome includes GSK3??, PKA regulatory subunits, Axin, and ??-catenin, situating it within the canonical Wnt/Frizzled/LRP5/6?CDvl?CAPC?C??-catenin axis. Upstream regulation occurs through Wnt ligands and GPCR-mediated PKA activation, while downstream transcriptional outputs modulate cell cycle and survival.
In the A-549 context, GSKIP knockout disrupts this pivotal regulatory node, attenuating inhibitory phosphorylation of GSK3?? and favoring ??-catenin degradation, which is expected to dampen Wnt target gene expression and impair pro-proliferative signaling. This model is thus uniquely suited to examine how scaffold-mediated PKA?CGSK3?? crosstalk contributes to the malignant phenotype of lung adenocarcinoma, and it provides a platform for evaluating the dependence of cancer cells on Wnt/??-catenin pathway integrity.
This polyclonal knockout model is applicable to a broad range of experimental paradigms, including western blotting for p-GSK3?? (Ser9) and total ??-catenin, RT-qPCR analysis of Wnt target genes, MTT/CCK-8 proliferation and colony formation assays, flow cytometry for cell cycle distribution, and TOP/FOP flash luciferase reporter assays to gauge ??-catenin-dependent transcription. It is an invaluable tool for drug target validation, cell cycle dysregulation studies, and investigations into Wnt pathway addiction in lung cancer. For further information and customization options, please contact Ascent Research.
