The ART1 Knockout SK-HEP-1 Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population in which targeted disruption of the ART1 gene has been introduced into the SK-HEP-1 host cell line. ART1 encodes an arginine-specific mono-ADP-ribosyltransferase that catalyzes the transfer of ADP-ribose from NAD+ to arginine residues on surface proteins, including integrins and the P2X7 receptor, thereby modulating their activity. This knockout model provides a powerful tool for dissecting the role of ADP-ribosylation in liver sinusoidal endothelial cell biology and associated disease contexts.
The host SK-HEP-1 cell line is a human liver sinusoidal endothelial-like cell line originally derived from the ascites of a patient with liver adenocarcinoma. It is widely used as a model for liver sinusoidal endothelial cells, retaining endothelial-like characteristics and providing a physiologically relevant system for studying liver cancer progression, hepatic immune responses, and endothelial cell adhesion. The tumor-derived background of these cells also makes them suitable for investigating oncogenic signaling and the tumor microenvironment.
ART1 functions at the intersection of ADP-ribosylation signaling, integrin-mediated cell adhesion, and inflammatory cytokine pathways. As a GPI-anchored ectoenzyme, ART1 catalyzes the ADP-ribosylation of target arginine residues on the cell surface, using NAD+ as a co-substrate. Key downstream targets include ADP-ribosylated integrins, the P2X7 receptor, and defensins, with functional consequences for NF-??B pathway modulation. Upstream regulators such as TNF-??, IL-1??, lipopolysaccharide, and cellular stress induce ART1 expression and activity, positioning the enzyme as a critical node in endothelial inflammatory responses and immune cell regulation.
In the SK-HEP-1 background, disruption of ART1 provides a unique opportunity to study the interplay between ADP-ribosylation and endothelial-associated processes in liver cancer. Given the role of liver sinusoidal endothelial cells in tumor angiogenesis, immune surveillance, and leukocyte trafficking, this knockout model enables investigation of how ART1-mediated post-translational modifications affect cell adhesion, cytokine signaling, and integrin activation. It is particularly relevant for research into inflammatory liver diseases, hepatocellular carcinoma, and the role of the sinusoidal endothelium in immune escape and metastasis.
The ART1 Knockout SK-HEP-1 Polyclonal Cells are suitable for a wide range of applications, including investigation of ADP-ribosylation in liver cancer, study of immune regulation in endothelial cells, analysis of integrin-dependent adhesion, and drug screening for ART1 inhibitors. Representative assays include ADP-ribosylation activity assays, western blotting with anti-ADP-ribose antibodies, cell adhesion assays, flow cytometry for integrin activation, RT-qPCR for cytokine expression, and immunofluorescence. For further technical details or ordering information, please contact Ascent Research.
