The HS3ST1 Knockout A-549 Polyclonal Cells constitute a CRISPR/Cas9-edited polyclonal knockout population derived from the human A-549 lung adenocarcinoma cell line, featuring targeted disruption of the HS3ST1 gene. This gene encodes heparan sulfate 3-O-sulfotransferase 1, an enzyme essential for generating anticoagulant heparan sulfate motifs. The polyclonal format ensures a heterogeneous pool of knockout variants, facilitating robust loss-of-function studies while avoiding clonal selection artifacts. These cells are well-suited for functional, signaling, and viral entry investigations requiring ablation of HS3ST1 activity.
The A-549 host cell line originates from type II pneumocytes of a lung adenocarcinoma and maintains adherent epithelial morphology with characteristics of alveolar type II epithelial cells, including surfactant production and relevant receptor expression. This well-characterized model is extensively employed in lung cancer biology, viral infection studies, and pharmacological testing, providing a reliable platform for CRISPR editing and downstream migration, invasion, and signaling assays.
HS3ST1 transfers sulfate to the 3-hydroxyl group of glucosamine residues in heparan sulfate, creating a 3-O-sulfated pentasaccharide that binds antithrombin III, markedly enhancing its inhibition of thrombin and factor Xa in the coagulation cascade. This sulfation also modulates FGF and Wnt signaling by influencing FGF2?CFGFR1 complex formation and Wnt3a activity, and serves as a cellular receptor for herpes simplex virus (HSV) via interaction with viral glycoprotein D. Essential cofactors include PAPS synthase as the sulfate donor and heparan sulfate proteoglycans as substrates, while downstream targets encompass antithrombin III, FGF2-FGFR1, Wnt3a, and HSV gD.
In the A-549 lung cancer context, HS3ST1 disruption alters the cellular heparan sulfate profile, potentially impacting cancer cell migration, invasion, and responsiveness to growth factors by affecting the presentation of 3-O-sulfated motifs. Loss of antithrombin binding may modulate local thrombin activity in the tumor microenvironment, while abrogation of HSV entry provides a tool for dissecting viral attachment in pulmonary epithelia. The knockout also permits examination of HS3ST1??s role in Wnt and FGF signal transduction in adenocarcinoma.
This polyclonal knockout population supports diverse research applications, including antithrombin-dependent anticoagulation studies using binding and coagulation assays, HSV-1 viral entry analyses, and heparan sulfate profiling in lung cancer. Experimental readouts may include Western blotting, RT-qPCR, flow cytometry for heparan sulfate epitopes, migration/invasion assays, RNA sequencing, and immunofluorescence. For additional details or technical inquiries, please contact Ascent Research.
