The ABHD4 Knockout SK-HEP-1 Polyclonal Cells are a heterogeneous pool of SK-HEP-1 human hepatocellular carcinoma cells subjected to CRISPR/Cas9-mediated disruption of the ABHD4 locus. This polyclonal knockout population provides a physiologically relevant loss-of-function model for investigating the role of ABHD4 in endocannabinoid metabolism and liver cancer biology.
SK-HEP-1 is an established cell line originally isolated from the ascites of a patient with liver adenocarcinoma. Although initially characterized as endothelial-like, subsequent studies confirmed its hepatic origin, making it a widely used model for hepatocellular carcinoma. The cells retain key features of hepatic malignancy and are suitable for studying cancer signaling, lipid metabolism, and cellular responses to pharmacological intervention.
ABHD4 encodes a serine hydrolase that specifically catalyzes the hydrolysis of N-acyl phosphatidylethanolamines (NAPEs) to generate N-acyl ethanolamines (NAEs), including the endocannabinoid anandamide (AEA), palmitoylethanolamide (PEA), and oleoylethanolamide (OEA). These bioactive lipids signal through cannabinoid receptors CB1 (CNR1) and CB2 (CNR2) and the peroxisome proliferator-activated receptor alpha (PPAR-??), regulating diverse physiological processes. ABHD4 functions in conjunction with fatty acid amide hydrolase (FAAH), which mediates downstream degradation of NAEs, and its activity is modulated by substrate availability and potentially by parallel phospholipase D pathways.
In the hepatocellular carcinoma context, disruption of ABHD4 likely alters endocannabinoid tone, impacting cell proliferation, apoptosis, inflammation, and metabolic reprogramming. SK-HEP-1 cells express components of endocannabinoid signaling, making this knockout model particularly useful for dissecting how NAE levels influence tumor biology. Research suggests that endocannabinoids can exert anti-tumorigenic effects in certain liver cancer settings, and ABHD4 knockout enables direct assessment of this pathway.
This polyclonal knockout cell pool is suitable for a wide range of functional assays, including Western blotting, enzyme activity measurements using fluorogenic substrates, LC-MS/MS quantification of N-acyl ethanolamines, and cell-based proliferation, apoptosis, and migration assays. Researchers can also employ RT-qPCR and RNA-seq to evaluate transcriptional changes. These cells serve as a powerful tool for drug screening for ABHD4 inhibitors and for investigating the intersection of lipid metabolism and hepatocellular carcinoma. For technical inquiries, please contact Ascent Research.
