The KCNJ2 Knockout Ca Ski Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal cell population derived from the human Ca Ski cervical squamous carcinoma cell line, in which the KCNJ2 gene has been disrupted. This polyclonal knockout product provides a heterogeneous pool of loss-of-function alleles for the inward rectifier potassium channel Kir2.1, enabling robust functional studies without single-cell cloning artifacts. The knockout model serves as a versatile tool for investigating Kir2.1-dependent signaling in a cervical cancer epithelial background.
The parental Ca Ski cell line is a widely used model of human cervical squamous cell carcinoma, originally isolated from a metastatic site and harboring integrated HPV-16 sequences. Ca Ski cells exhibit epithelial morphology and retain key characteristics of the original tumor, including expression of viral oncoproteins E6 and E7, which perturb p53 and retinoblastoma pathways. This genetic background makes Ca Ski cells particularly relevant for studying the interplay between viral transformation and host ion channel function in cervical cancer progression.
KCNJ2 encodes Kir2.1, a strong inward rectifier potassium channel critical for maintaining resting membrane potential and controlling cellular excitability. Kir2.1 conductance is tightly regulated by membrane phosphatidylinositol 4,5-bisphosphate (PIP2), G?¦? subunits, protein kinases A and C (PKA, PKC), magnesium, and polyamines. Through its control of membrane potential, Kir2.1 modulates calcium influx via voltage-gated calcium channels such as Cav1.2, thereby influencing downstream calcium-sensitive signaling cascades. Notably, Kir2.1 forms macromolecular complexes with scaffolding proteins including DLG1/SAP97 and DLG4/PSD95, syntrophin, and filamin A, and functionally couples to ??2-adrenergic receptors (ADRB2). Disruption of KCNJ2 leads to altered calcium dynamics and impaired nuclear factor of activated T-cells (NFAT) nuclear translocation, resulting in transcriptional reprogramming of cell cycle regulators such as p27Kip1 and cyclin D1.
In the context of Ca Ski cervical cancer cells, Kir2.1 has been implicated in the regulation of proliferation, migration, and apoptosis, with altered KCNJ2 expression reported in certain tumor types. The KCNJ2 polyclonal knockout in this HPV-16-positive epithelial background provides a physiologically relevant model to dissect the contribution of ion channel-mediated membrane potential control to oncogenic signaling. By uncoupling Kir2.1 activity from downstream pathways, researchers can examine how voltage-dependent calcium entry and NFAT-driven transcription influence cancer cell behavior, potentially revealing vulnerabilities for therapeutic intervention.
This knockout product is ideally suited for a broad range of experimental applications, including cervical cancer ion channel functional studies, screening of Kir2.1 inhibitors, and detailed analysis of potassium channel-dependent signaling networks. Representative assays compatible with these polyclonal cells encompass Western blotting and RT-qPCR for gene expression analysis, membrane potential measurements using voltage-sensitive dyes, calcium imaging with Fluo-4 or equivalent indicators, MTT and Transwell migration/invasion assays for functional readouts, patch-clamp electrophysiology for direct channel characterization, and phospho-NFAT detection to probe transcriptional responses. For further technical details and ordering information, please contact Ascent Research.
