The KCNK3 Knockout AGS Polyclonal Cells are a heterogeneous population of AGS gastric adenocarcinoma cells generated via CRISPR/Cas9-mediated gene disruption of KCNK3, producing a loss-of-function model for the TASK-1 two-pore domain potassium channel. This polyclonal knockout pool avoids clonal isolation, preserving the biological variability inherent in tumor cell populations and enabling robust investigation of TASK-1-dependent signaling processes in gastric cancer.
AGS cells, the host line, are adherent epithelial cells originally derived from a human gastric adenocarcinoma. Widely used as a model system for gastric cancer research, they recapitulate key aspects of tumor biology including proliferation, apoptosis, migration, and drug response, and are also employed in studies of Helicobacter pylori infection. The gastric epithelial origin makes AGS cells a relevant platform for examining ion channel contributions to carcinogenesis.
KCNK3 encodes TASK-1, a background potassium channel that stabilizes the resting membrane potential. TASK-1 activity is modulated by diverse upstream signals, including hypoxia, extracellular acidosis, serotonin via the 5-HT1A receptor coupled to G??i/o proteins, norepinephrine, volatile anesthetics, and phosphorylation by protein kinases A and C. The channel interacts with TASK-3, 14-3-3 proteins, ??-arrestin, G protein subunits, and phosphoinositides. In AGS cells, TASK-1 regulates membrane potential, thereby controlling the activity of voltage-gated calcium channels and downstream MAPK/ERK signaling, which in turn governs proliferation, apoptosis, and migration. Knockout of KCNK3 eliminates these background currents, profoundly altering cellular excitability and calcium dynamics.
Within the gastric adenocarcinoma context, KCNK3 knockout provides a powerful tool to dissect the contributions of TASK-1 to tumorigenesis. The polyclonal nature of the population permits assessment of heterogeneous functional outcomes, such as variable sensitivity to apoptosis inducers or altered invasive capacity. Given the channel’s link to MAPK/ERK-driven proliferation, this model is valuable for studying drug resistance mechanisms and GPCR-mediated regulation of TASK-1. Additionally, it can be used to explore how TASK-1 impacts signaling pathways activated by H. pylori infection.
This knockout product supports a broad array of experimental applications. Researchers can confirm gene disruption via Western blotting and RT-qPCR, directly measure the loss of TASK-1 currents using patch-clamp electrophysiology, and evaluate functional consequences through cell viability (MTT/resazurin), apoptosis (Annexin V/PI), and migration (wound healing/transwell) assays. Calcium imaging and phospho-ERK ELISA further delineate signaling alterations. The cells are also suitable for drug sensitivity testing and high-throughput screening of TASK-1 modulators in gastric adenocarcinoma. For additional information or technical assistance, please contact Ascent Research.
