The HS3ST1 Knockout 786-O Polyclonal Cells comprise a CRISPR/Cas9-edited polyclonal knockout cell population engineered to disrupt the human HS3ST1 gene in the 786-O host cell line. This product provides researchers with a robust in vitro loss-of-function model to interrogate the biological roles of heparan sulfate 3-O-sulfotransferase 1 without the need for clonal isolation. The polyclonal format retains heterogeneous editing outcomes while ensuring broad gene disruption across the population, enabling functional studies that more closely reflect mixed cellular contexts. Designed for use in advanced biomedical research, these knockout cells facilitate investigations into heparan sulfate biology and its impact on signal transduction pathways.
The host cell line, 786-O, originates from a human renal clear cell adenocarcinoma and serves as a well-characterized model for renal carcinoma research. This adherent epithelial cell line maintains key genotypic and phenotypic features of primary clear cell renal cell carcinoma (ccRCC), including VHL gene inactivation and constitutive HIF pathway activation. Consequently, 786-O cells are extensively employed to study oncogenic signaling networks, tumor metabolism, and therapeutic responses relevant to kidney cancer. The integration of HS3ST1 knockout into this genetic background allows dissection of heparan sulfate-dependent mechanisms specifically within a representative ccRCC context.
HS3ST1 encodes a sulfotransferase catalyzing 3-O-sulfation of glucosamine residues in heparan sulfate, generating rare motifs that serve as selective binding sites for growth factors such as FGF2, VEGF, and Wnt ligands. This modification regulates signaling through receptors like FGFR1 and Frizzled. HS3ST1 operates within a biosynthetic pathway involving EXT1, EXT2, and NDST1, and modulates proteoglycans including SDC1 and GPC3. Its activity directly influences FGF?CFGFR-mediated ERK phosphorylation and Wnt?CFrizzled cascades, placing it upstream of mitogenic and migratory signals. Disruption of HS3ST1 fundamentally alters growth factor?Cresponsive pathways, offering a tool to dissect sulfation-dependent signaling nodes.
In the 786-O renal carcinoma model, HS3ST1 knockout perturbs heparan sulfate fine structure, potentially attenuating FGF2- and Wnt-driven proliferation, survival, and invasion. Given the link between aberrant heparan sulfate metabolism and ccRCC progression, this polyclonal population enables dissection of sulfation-dependent tumor cell behavior. Researchers can examine receptor activation, kinase cascades, and transcriptional changes reliant on HS3ST1. The model may uncover synthetic vulnerabilities or altered drug sensitivities, informing therapeutic strategies targeting glycocalyx biology in renal malignancies.
Applications include western blotting, heparan sulfate disaccharide analysis, and phospho-ERK/phospho-AKT assays to assess signaling. Functional migration/invasion and proliferation assays link loss to metastatic potential. Transcriptomics by RNA-seq and flow cytometry for heparan sulfate epitopes further characterize knockout effects. Ideal for clear cell renal carcinoma, heparan sulfate signaling defects, and glycocalyx studies. For details, contact Ascent Research.
