The IL15RA Knockout SK-HEP-1 Polyclonal Cells are a CRISPR/Cas9-edited human cell population with targeted disruption of the interleukin-15 receptor subunit alpha (IL15RA) gene. Generated by electroporation of Cas9 and guide RNAs into SK-HEP-1 hepatic adenocarcinoma cells, this polyclonal population offers a pooled knockout model without clonal selection. The resulting loss of IL15RA abolishes IL-15 trans-presentation capacity, enabling functional studies in hepatocellular carcinoma research.
SK-HEP-1 is a human hepatic adenocarcinoma cell line derived from ascites of a hepatocellular carcinoma patient. This model is widely used for studying liver cancer biology, including tumor microenvironment interactions and cytokine signaling. As a knockout host, it permits dissection of receptor-mediated pathways in a relevant cancer cell background.
IL15RA encodes the high-affinity IL-15 receptor alpha chain, which mediates trans-presentation of IL-15 to the IL-2 receptor beta (IL-2R??) and common gamma chain (??c) complex. Ligand binding induces heterotrimeric receptor assembly, activating Janus kinases JAK1 and JAK3. These phosphorylate STAT5, which dimerizes and translocates to the nucleus to induce target genes including Bcl-2 and Myc. Parallel signaling via PI3K phosphorylates AKT, activating mTOR and promoting cell survival and proliferation, while MAPK cascades contribute to effector functions. Upstream cytokines TNF-alpha and IFN-gamma regulate IL15RA expression, and downstream mediators such as AKT, mTOR, and Bcl-2 coordinate anti-apoptotic programs.
In hepatocellular carcinoma, IL-15 trans-presentation by tumor cells can activate natural killer (NK) cells and CD8+ T lymphocytes, potentially enhancing anti-tumor immunity. Conversely, dysregulated IL15RA expression may foster immune evasion by altering the tumor microenvironment. Knocking out IL15RA in the SK-HEP-1 hepatic adenocarcinoma model enables dissection of tumor cell-autonomous effects and paracrine signaling to immune effectors. It allows investigation of how loss of this receptor impacts cytokine-driven survival pathways and immune cell recruitment, thereby clarifying its role in liver cancer progression and escape from immune surveillance.
These polyclonal knockout cells are well-suited for a range of assays: western blot and flow cytometric detection of IL15RA and phospho-STAT5, IL-15 stimulation assays, NK cell cytotoxicity co-cultures, and cell proliferation measurements. RT-qPCR and RNA-seq can profile downstream transcriptional changes. Applications include probing IL-15-dependent immune activation, screening inhibitors of the IL-15 pathway, and modeling tumor-immune interactions in hepatocellular carcinoma. For additional information, please contact Ascent Research.
