The HS3ST1 Knockout TE1 Polyclonal Cells are a genetically modified human cell population derived from the TE1 esophageal squamous cell carcinoma (ESCC) line, generated using CRISPR/Cas9-mediated disruption of the HS3ST1 gene. This product is supplied as a polyclonal knockout population, representing a heterogeneous pool of edited cells that collectively exhibit loss of HS3ST1 function. The polyclonal format minimizes clonal selection bias and enables the study of gene disruption effects across a range of editing outcomes without the need for single-cell isolation. These cells are useful for studying HS3ST1 function in ESCC.
The parental TE1 cell line originates from a human esophageal squamous cell carcinoma and is a well-established in vitro model for ESCC research. TE1 cells maintain epithelial morphology and express markers of squamous differentiation, facilitating studies of oncogenic signaling, tumor cell migration, and therapeutic responses. This ESCC background provides a clinically relevant context for dissecting HS3ST1 functions, given the gene??s emerging association with esophageal and other gastrointestinal cancers.
HS3ST1 encodes a heparan sulfate 3-O-sulfotransferase that catalyzes the 3-O-sulfation of glucosamine residues in heparan sulfate proteoglycans, creating specific motifs that bind antithrombin III and modulate growth factor signaling. These motifs interact with the FGF2?CFGFR1 complex and Wnt3a in conjunction with Frizzled receptors and LRP5/6, enhancing downstream pathway activation. Additionally, 3-O-sulfated heparan sulfate serves as a receptor for herpes simplex virus glycoprotein D, mediating viral entry. Thus, HS3ST1 integrates anticoagulation, FGF/Wnt signaling, and viral infection mechanisms.
In TE1 cells, disruption of HS3ST1 is expected to alter heparan sulfate sulfation patterns, impairing binding of FGF2, Wnt3a, and antithrombin III and likely affecting cell proliferation, migration, and invasion??processes critical to ESCC progression. Loss of HS3ST1 may also reduce susceptibility to herpes simplex virus infection. The polyclonal knockout pool captures diverse editing outcomes, enabling robust assessment of functional consequences in a disease-relevant cellular background.
These cells support extensive applications, including mechanistic research on heparan sulfate?Cdependent signaling in cancer, quantitative proliferation and migration assays, and antiviral entry studies. Methodologies such as Western blotting, RT-qPCR, immunofluorescence, flow cytometry, antithrombin binding assays, phospho-protein analysis, and RNA sequencing can be employed. The knockout model also serves as a platform for HS3ST1-targeted drug validation. For detailed characterization data, please contact Ascent Research.
