The EEF1D Knockout SK-HEP-1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population with targeted disruption of the EEF1D gene, eliminating functional expression of the translation elongation factor 1 delta subunit. This knockout model is generated without single-cell cloning, yielding a heterogeneous pool that mimics natural genetic variation. The product provides a ready-to-use loss-of-function system for studying translation regulation in a human hepatic endothelial context. By abrogating EEF1D function, these cells enable investigation of protein synthesis and its role in endothelial biology and cancer.
SK-HEP-1 is a human hepatic sinusoidal endothelial cell line derived from a hepatic adenocarcinoma, retaining key endothelial features such as tube formation and barrier function. These cells are widely employed to model liver sinusoidal biology, angiogenesis, and tumor?Cendothelial interactions, making them a relevant system for hepatocellular carcinoma research. The endothelial phenotype of SK-HEP-1, despite its tumor origin, allows studies of how translational control impacts endothelial-dependent processes within the cancer microenvironment. This host background is particularly suited for investigating the intersection of endothelial biology and oncogenic signaling in the liver.
EEF1D encodes the delta subunit of the eEF1B complex, a guanine nucleotide exchange factor for eEF1A that is essential for translation elongation. It is activated by casein kinase 2 and mTORC1 and interacts with eEF1B gamma, eEF1A, and valyl-tRNA synthetase to facilitate ribosomal translocation. In the eEF1B complex, EEF1D coordinates with other subunits (eEF1B alpha, beta, gamma) and the ribosome to maintain translational fidelity and elongation rates. Knockout of EEF1D impairs GTP recycling on eEF1A, disrupting global protein synthesis and attenuating mTOR-mediated growth signals.
In SK-HEP-1 cells, loss of EEF1D creates a unique model for dissecting the role of translation elongation in endothelial barrier function, angiogenesis, and cancer cell proliferation. The disruption of protein synthesis homeostasis is particularly relevant to hepatocellular carcinoma, where dysregulated translation supports tumor growth. This polyclonal knockout model enables the study of translational control in a hepatic endothelial adenocarcinoma background, linking protein synthesis to tumorigenic phenotypes.
These cells are suitable for western blotting, RT-qPCR, proliferation assays, tube formation assays, puromycin incorporation assays, and polysome profiling to assess translational output. They are also applicable for drug screening targeting elongation factors and for angiogenesis modeling. The polyclonal nature of the knockout avoids clonal artifacts, providing a more representative model for heterogeneous tumor cell populations. These EEF1D knockout SK-HEP-1 polyclonal cells thus serve as a versatile platform for both basic and translational studies, from uncovering fundamental mechanisms of translation control to evaluating therapeutic candidates. For additional information, please contact Ascent Research.
