The KCNJ2 Knockout A-549 Polyclonal Cells constitute a CRISPR/Cas9-mediated gene disruption product targeting the KCNJ2 locus in the A-549 human lung adenocarcinoma epithelial cell line. This polyclonal knockout population contains a heterogeneous mixture of edited cells, each carrying distinct loss-of-function mutations within the KCNJ2 gene, which encodes the inward rectifier potassium channel Kir2.1. By eliminating the IK1 current, this knockout model provides a robust platform for studying Kir2.1-dependent cellular processes without relying on pharmacological inhibitors or single-clone artifacts. The product is supplied as a cryopreserved polyclonal pool and is suitable for a wide range of functional assays.
The parental A-549 cell line, established from a 58-year-old male patient with lung adenocarcinoma, exhibits adherent epithelial morphology and retains features of alveolar type II cells. This well-characterized cancer model is widely employed in studies of tumor biology, including proliferation, migration, drug resistance, and signal transduction. The A-549 background offers a physiologically relevant context for examining how ion channel dysfunction contributes to malignant phenotypes, particularly in lung cancer. Its adherent growth characteristics facilitate high-resolution imaging and electrophysiological recordings, enabling detailed mechanistic investigations.
KCNJ2 encodes Kir2.1, a strongly inwardly rectifying potassium channel that stabilizes the resting membrane potential and controls cellular excitability. The channel requires phosphatidylinositol 4,5-bisphosphate (PIP2) for activation and is subject to regulation by protein kinase A (PKA) and protein kinase C (PKC) downstream of G-protein-coupled receptors. Kir2.1 assembles into macromolecular complexes with scaffold proteins SAP97 (DLG1), LIN7, and CASK, and can heteromerize with related subunits Kir2.3 (KCNJ4) and Kir2.2 (KCNJ12). Disruption of KCNJ2 eliminates the IK1 current, leading to membrane depolarization, altered calcium influx via voltage-gated calcium channels, and downstream modulation of MAPK signaling pathways and cell cycle regulators.
In A-549 lung adenocarcinoma cells, KCNJ2 knockout is expected to perturb the delicate balance of potassium homeostasis and membrane potential, with significant consequences for cancer-associated behaviors. Loss of Kir2.1 function may deregulate calcium-dependent proliferation signals, impact cell migration via membrane potential-sensitive transporters, and potentially sensitize cells to apoptotic stimuli. This polyclonal knockout model is therefore an indispensable tool for dissecting the role of ion channels in non-excitable cancer cells, enabling researchers to investigate how Kir2.1 influences tumorigenic processes in the lung epithelial context.
This knockout model is suited for functional studies of Kir2.1 in cancer, drug target validation, and electrophysiological analysis using patch-clamp. It enables cell proliferation assays (MTT), transwell migration assays, calcium imaging, and RNA-seq profiling. Standard molecular and biochemical techniques such as western blotting, RT-qPCR, and immunofluorescence are routinely employed to confirm target disruption and characterize downstream effects. For additional information or to inquire about custom products, contact Ascent Research.
