The KCNK3 Knockout LoVo Polyclonal Cells product is a CRISPR/Cas9-edited polyclonal knockout cell population derived from the human LoVo colorectal adenocarcinoma cell line, featuring targeted disruption of the KCNK3 gene. This loss-of-function model eliminates TASK-1 potassium channel expression, enabling systematic investigation of its roles in cellular excitability and colorectal cancer biology. The heterogeneous knockout pool retains parental genetic diversity, offering a robust platform for functional assays and screening.
The LoVo cell line serves as a well-characterized model of colorectal adenocarcinoma, originally isolated from a metastatic lymph node. These epithelial cells are widely employed in cancer research to study metastasis, drug resistance, and tumor microenvironment interactions, expressing molecular markers of colorectal cancer. LoVo cells provide a relevant host for examining ion channel contributions to oncogenic processes.
KCNK3 encodes TASK-1, a two-pore-domain potassium channel that mediates background leak currents essential for maintaining resting membrane potential. TASK-1 activity is modulated by hypoxia, extracellular pH, volatile anesthetics (halothane, isoflurane), and signaling through Gq/11-coupled receptors (e.g., angiotensin II, acetylcholine) via PKA and PKC. The channel forms heterodimers with KCNK9 (TASK-3) and interacts with 14-3-3 proteins and cytoskeletal components. Knockout of KCNK3 ablates these currents, leading to membrane depolarization and alterations in intracellular Ca2+ levels, gene expression, cell proliferation, and apoptosis.
In LoVo colorectal cancer cells, loss of TASK-1 disrupts resting membrane potential regulation, potentially affecting proliferation, survival under hypoxic stress, and responses to extracellular signals. Since TASK-1 channels contribute to sensing the tumor microenvironment’s pH and oxygen gradients, their deletion may impair adaptive mechanisms that support cancer cell fitness and invasion. This isogenic model is thus well-suited for dissecting background potassium conductance roles in tumor progression and therapeutic resistance.
Applications include patch-clamp electrophysiology, DiBAC4(3) membrane potential assays, and functional studies of hypoxia and GPCR signaling. The polyclonal knockout cells enable proliferation (MTT), apoptosis (Annexin V), and migration (Transwell) assays, along with gene expression profiling (qPCR) under controlled oxygen levels. Researchers can employ these cells for TASK-1 modulator screening and investigation of crosstalk with cAMP/PKA and PKC pathways. For further information, please contact Ascent Research.
