The KNTC1 knockout SK-HEP-1 polyclonal cells are a CRISPR/Cas9-edited polyclonal knockout cell population targeting the KNTC1 gene in the human SK-HEP-1 cell line. This loss-of-function model enables systematic investigation of KNTC1-dependent processes in a liver adenocarcinoma-derived epithelial background. The polyclonal nature provides a heterogeneous pool of edited cells, robust for studying gene function without clonal selection artifacts. It is ideally suited for examining mitotic regulation, chromosome segregation, and cancer-associated chromosomal instability.
SK-HEP-1 is a well-characterized human hepatocellular carcinoma cell line originally isolated from the ascites of a patient with liver adenocarcinoma. It exhibits an adherent morphology and is extensively employed in liver cancer research, including studies of tumor biology, drug sensitivity, and metastatic potential. The hepatic origin and epithelial characteristics make SK-HEP-1 a highly relevant model for dissecting mitotic defects that drive hepatocellular carcinoma progression. Combining KNTC1 knockout with this host cell background provides a physiologically appropriate system for exploring the interplay between mitotic checkpoint pathways and hepatocarcinogenesis.
KNTC1 (ROD) encodes a core subunit of the RZZ complex, which also includes ZW10 and ZWILCH. The complex localizes to unattached kinetochores, recruits dynein-dynactin, and mediates chromosome congression and spindle assembly checkpoint silencing. KNTC1 is phosphorylated by CDK1, Aurora B, and PLK1, and its kinetochore assembly depends on BUB1 and BUBR1. It directly interacts with dynein, dynactin, the Ndc80 complex, and CENP-E. Downstream, dynein-dependent removal of MAD2 from kinetochores permits CDC20-mediated APC/C activation and mitotic progression. Disruption of KNTC1 compromises this network, causing persistent checkpoint activation, mitotic delay, and chromosomal missegregation.
In hepatocellular carcinoma, elevated KNTC1 correlates with poor prognosis and chromosomal instability. This SK-HEP-1 knockout model allows dissection of KNTC1 loss on mitotic fidelity and cell cycle progression in liver cancer cells, and assessment of RZZ complex contributions to genomic integrity. It also facilitates evaluation of therapeutic strategies targeting mitotic vulnerabilities in HCC and comparative studies in colorectal and breast cancers where KNTC1 dysfunction is implicated.
Typical applications include characterization of the mitotic spindle assembly checkpoint, investigation of chromosomal instability mechanisms, and anti-mitotic compound screening (e.g., microtubule-targeting agents). Representative assays: western blotting for Cyclin B1 and Securin, immunofluorescence for kinetochore proteins, flow cytometry for DNA content, live-cell imaging of mitosis, co-immunoprecipitation of RZZ components, and karyotyping for chromosomal aberrations. This polyclonal knockout toolset supports fundamental cell biology and translational oncology research. For technical details and ordering, contact Ascent Research.
