This product consists of a CRISPR/Cas9-edited polyclonal knockout cell population derived from the SK-HEP-1 human liver adenocarcinoma cell line, engineered for disruption of the KPNA3 gene. KPNA3 encodes importin alpha?3, a key adaptor in the classical nuclear import pathway. The polyclonal knockout format provides a heterogeneous pool of cells with targeted gene disruption, enabling loss?of?function studies without clonal selection artifacts. This model is suitable for investigating the functional consequences of KPNA3 deficiency in hepatocellular carcinoma and other biological contexts.
SK-HEP?1 is an epithelial cell line originally established from the ascitic fluid of a patient with liver adenocarcinoma and is widely utilized as a model for hepatocellular carcinoma (HCC). These cells harbor molecular features characteristic of hepatic malignancies, making them a relevant platform for exploring oncogenic signaling and tumor?suppressive mechanisms. The endogenous expression of nuclear transport machinery and responsiveness to inflammatory cytokines further enhance their utility for dissecting KPNA3-dependent processes.
KPNA3 (importin alpha?3) functions as a nuclear import adaptor that recognizes classical nuclear localization signals (NLS) on cargo proteins, facilitating their translocation through the nuclear pore complex in a complex with importin beta1 (KPNB1) and the Ran GTPase system. KPNA3 is regulated by upstream signals including interferon?gamma, STAT1, STAT3, NF???B, and hypoxia, and it mediates the nuclear import of transcription factors such as STAT1, STAT3, NF???B, p53, and c?Myc. Through these interactions, KPNA3 integrates extracellular cues with transcriptional programs governing immune responses, cell proliferation, and DNA repair. It also interacts with viral proteins like HIV?1 Vpr and influenza virus NP. Disruption of KPNA3 perturbs multiple signaling nodes, including the JAK?STAT, NF???B, and interferon pathways.
In the context of SK-HEP?1 HCC cells, KPNA3 knockout provides a powerful tool to dissect the role of nuclear transport in hepatocarcinogenesis. Aberrant nucleocytoplasmic shuttling of transcription factors is a hallmark of many cancers, and KPNA3 has been implicated in the nuclear accumulation of oncogenic and tumor?suppressive proteins. By depleting KPNA3 in an HCC background, researchers can assess the impact on STAT3? and NF???B?dependent gene expression, cell cycle progression, apoptosis, and response to cytokine stimulation. This model is particularly suited to investigating how altered nuclear import contributes to liver cancer cell behavior and therapeutic resistance.
The KPNA3 knockout SK-HEP?1 polyclonal cell population is designed for subcellular fractionation and western blotting to monitor cargo localization, immunofluorescence microscopy for transcription factor distribution, luciferase reporter assays for NF???B or STAT activity, and cell proliferation or apoptosis assays. It also supports viral infection and replication studies and enables screening of nuclear import inhibitors. For further details, please contact Ascent Research.
