The KCNN4 Knockout HCT 116 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the HCT 116 human colorectal carcinoma cell line. This product offers a loss-of-function model for investigating the intermediate-conductance calcium-activated potassium channel KCNN4 (KCa3.1), achieved through targeted gene disruption at the endogenous locus. The polyclonal nature of the knockout pool provides a robust and representative background for studying gene function, avoiding clonal selection biases while preserving the heterogeneous characteristics of the original tumor cell population.
The parental HCT 116 cell line is a widely used model for colon cancer research, characterized by a near-diploid karyotype and key oncogenic mutations in KRAS (G13D) and CTNNB1, the latter driving constitutive Wnt/??-catenin signaling. These cells are microsatellite stable (MSS) and mismatch repair-proficient, representing a genetically defined subtype of colorectal carcinoma. The epithelial origin and adherent growth properties of HCT 116 make it suitable for a range of in vitro functional assays.
KCNN4 encodes a potassium channel that is activated by calcium-bound calmodulin, enabling potassium efflux and consequent membrane hyperpolarization. This hyperpolarization increases the electrochemical driving force for calcium entry, sustaining elevated intracellular calcium levels that trigger downstream signaling cascades, including calmodulin-dependent kinases, MAPK, and PI3K/AKT pathways. KCNN4 interacts with cytoskeletal regulators such as cortactin and the actin cytoskeleton, and its activity is modulated by upstream signals including TNF-??, IL-4, and store-operated calcium entry. Through these interactions, KCNN4 promotes cell proliferation, migration, and volume regulation, positioning it as a critical node linking ion flux to oncogenic signaling.
In the HCT 116 context, where constitutive Wnt/??-catenin and oncogenic KRAS signaling drive tumorigenesis, KCNN4-mediated ion transport further potentiates pro-tumorigenic phenotypes. Disruption of KCNN4 in this background allows researchers to dissect the specific contribution of calcium-activated potassium currents to colorectal cancer cell behaviors such as migration, invasion, and clonogenic growth. The model is particularly valuable for evaluating the therapeutic potential of KCNN4 pharmacological inhibitors like TRAM-34 and clotrimazole, which have shown preclinical activity in CRC models.
Typical research applications include calcium imaging with Fluo-4 to monitor intracellular Ca2+ oscillations, patch-clamp electrophysiology to assess channel activity, Boyden chamber assays for migration and invasion, MTS proliferation assays, and flow cytometric analysis of cell cycle and apoptosis. This knockout pool also serves as a tool for drug screening targeting KCa3.1 and for investigating crosstalk between ion channels and kinase signaling networks. For additional information or custom inquiries, please contact Ascent Research.
