KCNK3 Knockout 143B Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the 143B human osteosarcoma cell line. This product features targeted disruption of the KCNK3 gene, which encodes the TASK-1 (TWIK-related acid-sensitive K+ channel 1) two-pore-domain potassium leak channel. The polyclonal knockout format provides a heterogeneous mixture of cells with KCNK3 loss-of-function mutations, enabling robust loss-of-function studies without monoclonal selection. This cell model is designed for investigating the roles of TASK-1 background potassium conductance in cancer biology, particularly in the context of osteosarcoma.
The 143B cell line was originally established from a human osteosarcoma and has since served as a widely used model for bone cancer research. 143B cells exhibit aggressive tumorigenic properties, including high metastatic potential and rapid proliferation, making them suitable for studying tumor progression and metastasis. Their epithelial-like morphology and well-characterized genetic background support reproducible experimentation. By introducing KCNK3 knockout in this osteosarcoma model, the cells become a powerful tool to dissect the contribution of TASK-1 potassium channels to cancerous bone cell physiology and pathology.
KCNK3 encodes TASK-1, a two-pore-domain potassium leak channel that constitutively conducts K+ ions, setting the resting membrane potential and regulating excitability. TASK-1 is modulated by hypoxia, serotonin, GPCR agonists (angiotensin II, endothelin-1), PKA, PKC, and pH. Knockout abolishes background K+ currents, depolarizing the membrane, which can alter calcium influx and downstream MAPK signaling, influencing proliferation and apoptosis. TASK-1 interacts with 14-3-3 proteins and arrestins, and heterodimerizes with TASK-3. The signaling network includes G-proteins, phospholipase C, PKC, and MAP kinases, linking KCNK3 to metabolic sensing and hypoxia responses.
In 143B osteosarcoma cells, KCNK3 knockout provides a unique model to study the role of TASK-1 in cancer cell physiology. Osteosarcoma is known to exhibit altered ion channel expression, and TASK-1 has been implicated in tumor microenvironment signaling, proliferation, and apoptosis. Ablation of KCNK3 in these cells may reveal dependencies on potassium conductance for processes such as migration, invasion, and hypoxia response. The model is particularly relevant for exploring how membrane potential changes influence malignant phenotypes and for evaluating KCNK3 as a potential therapeutic target in bone cancers and beyond.
Researchers can employ KCNK3 Knockout 143B Polyclonal Cells in a range of functional assays. Patch-clamp electrophysiology directly confirms loss of TASK-1 currents, while calcium imaging captures downstream effects on intracellular Ca2+. Migration and invasion assays assess metastatic potential changes. Proliferation (MTT) and apoptosis assays evaluate growth and survival alterations. Western blotting, RT-qPCR, and immunofluorescence validate knockout and downstream pathway activation, and RNA-seq enables transcriptome-wide insights. These cells serve as an essential tool for ion channel drug screening, investigating potassium channel roles in cancer, and dissecting signaling in the tumor microenvironment. For further technical support, please contact Ascent Research.
