The KCNK3 Knockout KYSE-150 Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal population derived from the human esophageal squamous cell carcinoma line KYSE-150, carrying targeted disruption of the KCNK3 gene. This gene encodes TASK-1, a two-pore domain potassium channel that mediates background potassium currents critical for setting the resting membrane potential. The polyclonal knockout pool provides a heterogeneous loss-of-function model, enabling the study of TASK-1-dependent physiology without clonal selection.
KYSE-150 is a widely used epithelial cell line established from a well-differentiated esophageal squamous cell carcinoma of a Japanese patient. It serves as a robust model for cancer biology research, including investigations into tumorigenesis, drug sensitivity, and signal transduction pathways relevant to esophageal cancer. The cells maintain characteristic features of squamous epithelial origin and are frequently employed in studies of oncogenic drivers, chemoresistance, and the tumor microenvironment.
KCNK3 (TASK-1) channels are inhibited by acidosis, hypoxia, volatile anesthetics, and Gq-coupled receptor signaling. Upon Gq activation, phospholipase C generates diacylglycerol, which stimulates protein kinase C to phosphorylate and inhibit TASK-1, causing membrane depolarization. Protein kinase A also modulates channel activity. The resulting depolarization opens voltage-gated calcium channels, triggering calcium influx that influences downstream targets such as cell proliferation and apoptosis. TASK-1 interacts with 14-3-3 proteins and can form heterodimers with TASK-3 (KCNK9), adding to the complexity of its regulation.
In the esophageal squamous cell carcinoma context, the tumor microenvironment is often acidic and hypoxic??conditions that modulate TASK-1 activity. Knockout of KCNK3 in KYSE-150 cells enables dissection of how TASK-1-dependent membrane potential changes affect calcium signaling, cell proliferation, migration, and invasion. This model thus provides a platform to evaluate the contribution of this potassium channel to ESCC pathobiology, including potential roles in pH sensing and adaptation to metabolic stress.
Applications of this polyclonal knockout model include patch-clamp electrophysiology to assay potassium currents, fluorescence-based membrane potential and calcium imaging, cell proliferation and migration/invasion assays, and western blotting for target validation. The cells are also suitable for compound screening against TASK-1 and for investigating pH-sensing mechanisms in cancer. Transcriptomic analysis via RNA-seq can uncover pathways affected by KCNK3 disruption. For further details or custom inquiries, please contact Ascent Research.
