The KCNJ2 Knockout NCI-H1299 Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population designed for targeted disruption of the KCNJ2 gene. By eliminating expression of the Kir2.1 inward rectifier potassium channel, this product provides a versatile loss-of-function model in a lung adenocarcinoma cell context. As a polyclonal population, it avoids the biases of single-cell clonal selection, offering a more heterogeneous representation of gene knockout effects. This model is particularly useful for studies requiring functional interrogation of KCNJ2 in human non-small cell lung cancer (NSCLC) cells.
The parental NCI-H1299 cell line is derived from a lymph node metastasis of a lung adenocarcinoma patient. It is a widely used epithelial model for NSCLC research, exhibiting tumorigenic and metastatic properties that recapitulate key aspects of disease progression. NCI-H1299 cells are characterized by their robust growth in vitro and in vivo, making them a suitable platform for genetic manipulation and subsequent functional assays. Their use here places KCNJ2 knockout in a clinically relevant context for investigating ion channel roles in lung cancer malignancy.
KCNJ2 encodes Kir2.1, a strong inward rectifier potassium channel essential for stabilizing the resting membrane potential and regulating cell excitability. Kir2.1 activity is stimulated by PIP2 and modulated through phosphorylation by PKA and PKC. Transcriptional control involves GATA4 and SP1. Kir2.1 forms complexes with SAP97, CASK, and integrin ??1, acting upstream of focal adhesion kinase (FAK) and Erk1/2 to regulate downstream targets such as cyclin D1 and voltage-gated calcium channels. This network coordinates cell proliferation, migration, and apoptosis; knockout of KCNJ2 therefore disrupts these key signaling nodes.
In the NCI-H1299 background, loss of Kir2.1 eliminates inward rectifier potassium currents, leading to membrane depolarization. This depolarization impairs calcium signaling and cell cycle progression, resulting in decreased proliferation and increased apoptosis. Concurrently, disruption of the integrin ??1-FAK-Erk1/2 axis compromises migratory and invasive capacities. These effects are directly pertinent to NSCLC, where KCNJ2 expression has been associated with tumor aggressiveness and metastatic potential. The polyclonal knockout model thus enables mechanistic dissection of Kir2.1 contributions to malignant phenotypes in a disease-relevant system.
Applications include patch clamp electrophysiology and membrane potential assays to verify channel loss, western blot and RT-qPCR for assessing KCNJ2 and downstream factors (e.g., cyclin D1, FAK), apoptosis detection by Annexin V/PI staining, transwell migration/invasion assays, and colony formation studies. RNA-seq can reveal transcriptome-wide changes. These tools support research into KCNJ2??s role in NSCLC tumorigenesis and metastasis, screening of Kir2.1 modulators, and integrin signaling studies. For additional information or to request a quote, contact Ascent Research.
