The HS3ST1 Knockout AGS Polyclonal Cells constitute a CRISPR/Cas9-edited polyclonal cell population in which the HS3ST1 gene has been disrupted via targeted genome editing. This human knockout model is established in the AGS gastric adenocarcinoma epithelial cell line and provides a loss-of-function system for investigating heparan sulfate biology. The polyclonal nature reflects a heterogeneous editing outcome across the cell population, ensuring robust representation of gene disruption without clonal isolation artifacts.
AGS cells are derived from a human gastric adenocarcinoma and serve as a well-established in vitro platform for studying gastric cancer pathophysiology. They retain key features of gastric epithelial cells, including expression of heparan sulfate proteoglycans and responsiveness to growth factors, making them a relevant host for examining tumor cell signaling, migration, and interactions with the tumor microenvironment.
HS3ST1 encodes heparan sulfate 3-O-sulfotransferase 1, which catalyzes the critical 3-O-sulfation of glucosamine residues within heparan sulfate chains. This modification generates high-affinity binding motifs for antithrombin III, fibroblast growth factor 2 (FGF2), vascular endothelial growth factor (VEGF), and herpes simplex virus (HSV) glycoprotein D. Consequently, HS3ST1 plays a pivotal role in anticoagulation by accelerating antithrombin III-mediated inhibition of thrombin and factor Xa, in signal transduction through FGF receptor (FGFR) and VEGF receptor (VEGFR) pathways, and in mediating HSV entry. The enzyme functions downstream of growth factor signaling and acts within a biosynthetic network that includes NDSTs, HS2ST1, and HS6ST1, which collectively determine heparan sulfate fine structure.
In the context of gastric adenocarcinoma, HS3ST1 disruption offers a precise tool to dissect the contribution of 3-O-sulfated heparan sulfate to tumor cell behavior. This model enables investigation of how altered sulfation patterns affect growth factor responsiveness, angiogenesis, and cell migration, processes intimately linked to tumor progression. Additionally, the AGS background allows exploration of the interplay between heparan sulfate, coagulation factors, and viral susceptibility, with implications for understanding thrombotic complications and HSV infections in cancer patients.
Researchers can utilize this polyclonal knockout cell pool in a wide array of experimental approaches, including western blotting and RT-qPCR for expression analysis, liquid chromatography-mass spectrometry (LC-MS) for heparan sulfate disaccharide profiling, antithrombin binding assays, phospho-ERK signaling readouts, coagulation assays, HSV entry assays, and cell proliferation and migration assays. These applications support studies in gastric cancer biology, heparan sulfate functional analysis, anticoagulation mechanisms, growth factor signaling in the tumor microenvironment, and viral entry. For further details, custom applications, or technical support, please contact Ascent Research.
