The IFT20 knockout SK-HEP-1 polyclonal cells consist of a polyclonal population of the human liver adenocarcinoma cell line SK-HEP-1, engineered with CRISPR/Cas9-mediated disruption of the IFT20 gene. This polyclonal knockout model provides a genetically mixed loss-of-function system, retaining cellular diversity while collectively abolishing IFT20 protein expression, making it suitable for robust population-level studies of gene function.
SK-HEP-1 is an adherent cell line derived from the ascitic fluid of a patient with liver adenocarcinoma. It is widely accepted as a model of hepatic adenocarcinoma of epithelial origin and is employed in studies of hepatocellular carcinoma biology, including proliferation, migration, and drug response. Its relevance as a liver cancer model makes it an appropriate host for investigating the role of ciliary genes in hepatocarcinogenesis.
IFT20 encodes an integral subunit of the intraflagellar transport complex B (IFT-B), which is essential for anterograde ciliary trafficking. The IFT20 protein directly interacts with IFT52, IFT88, and KIF3B to mediate cargo delivery along the axoneme. Transcription of IFT20 is controlled by FOXJ1 and RFX factors, while Aurora A kinase regulates IFT dynamics. Downstream, IFT20 is required for ciliary targeting of polycystin-2 and smoothened, thereby coupling IFT to Hedgehog signaling through GLI transcription factors. Disruption of IFT20 leads to defective ciliogenesis and altered Hedgehog-dependent cell proliferation and differentiation.
In the SK-HEP-1 liver adenocarcinoma context, IFT20 knockout provides a model to explore the role of primary cilia in hepatocellular carcinoma. The loss of IFT20 function is expected to abrogate ciliogenesis and impair trafficking of key ciliary membrane proteins such as smoothened and polycystin-2, thereby attenuating Hedgehog pathway activation. This cell population thus offers a physiologically relevant platform to investigate whether ciliary signaling functions as a tumor-suppressive or oncogenic mechanism in liver cancer and to probe connections between ciliary dysfunction and ciliopathy-like phenotypes in malignant epithelial cells.
Applications for this polyclonal knockout cell population include immunofluorescence staining for ciliary markers (acetylated tubulin, ARL13B) to assess ciliogenesis, western blotting and RT-qPCR for IFT20 and ciliary gene expression, scanning electron microscopy for cilia ultrastructure, and co-immunoprecipitation to confirm disrupted interactions with partners such as IFT88 or GMAP210. Functional phenotyping via flow cytometry, wound healing, and drug sensitivity assays complements transcriptome profiling by RNA-seq. These cells are ideal for studying ciliogenesis, ciliary signaling, and ciliopathy mechanisms. For more information, contact Ascent Research.
