The KCNJ2 Knockout 143B Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the human 143B osteosarcoma cell line. This product introduces a targeted disruption of the KCNJ2 gene locus, resulting in a heterogeneous pool of cells carrying diverse loss-of-function mutations. As a polyclonal pool, these cells retain genetic variation that better reflects the dynamic nature of tumor cell populations compared to clonal isolates, making them suitable for studies requiring representation of multiple knockout alleles. The knockout is achieved through CRISPR/Cas9-mediated gene disruption, without selection for a specific mutation type, and the resulting cell pool serves as a versatile model for investigating KCNJ2-dependent processes in a cancer-relevant cellular context.
The 143B cell line is a well-characterized human osteosarcoma model with osteoblastic features and strong tumorigenic and metastatic potential. Widely used in cancer research, it recapitulates key aspects of bone tumor progression, including proliferation, invasion, and drug resistance. 143B cells retain relevant signaling pathways, making them an appropriate host for dissecting gene function in osteosarcoma. Introducing KCNJ2 knockout into this context allows focused investigation of ion channel contributions to malignant phenotypes.
The KCNJ2 gene encodes Kir2.1, an inward rectifier potassium channel essential for establishing the resting membrane potential and controlling cellular excitability. Its activity is upregulated by PIP2 and modulated by PKA and PKC in response to adrenergic signals, while intracellular Mg2+ mediates inward rectification. Kir2.1 complexes with scaffolding proteins DLG1 and CASK, and its trafficking depends on interactions with FLNA and CAV3. These associations enable KCNJ2 to stabilize the resting membrane potential, regulate action potential duration, and modulate intracellular Ca2+ levels. KCNJ2 belongs to a subfamily including KCNJ4, KCNJ12, and KCNJ14, and functionally overlaps with GIRK and KCNQ1 channels.
Disruption of KCNJ2 in 143B osteosarcoma cells ablates the IK1 inward rectifier current and is expected to depolarize the resting membrane potential, potentially triggering downstream effects on Ca2+ handling and cell cycle regulation. In osteosarcoma, these changes may alter proliferation rates, migratory capacity, and susceptibility to apoptosis, providing a platform to dissect membrane potential-dependent cancer cell behaviors. This polyclonal knockout model avoids the selection pressure of clonal isolation, offering a physiologically relevant tool to assess how Kir2.1 loss influences signaling networks implicated in bone tumor progression.
Researchers can employ this polyclonal knockout cell pool in electrophysiological assays using patch-clamp recording to confirm IK1 current loss, and membrane potential-sensitive dyes to monitor voltage changes. Proliferation (MTT), migration/invasion, and apoptosis assays enable functional profiling, while RNA-seq and immunofluorescence reveal transcriptomic and proteomic alterations. These cells are suited for studying ion channel roles in osteosarcoma, screening Kir2.1 modulators, and exploring membrane potential-driven signaling in cancer. For further technical details or custom projects, please contact Ascent Research.
