The EBP Knockout HeLa Polyclonal Cells are a CRISPR/Cas9-edited polyclonal population derived from the HeLa human cervical adenocarcinoma cell line, engineered to disrupt the EBP gene. EBP encodes emopamil-binding protein, a sterol ??8-??7 isomerase essential for cholesterol biosynthesis. This knockout model provides a powerful loss-of-function system for investigating post-squalene cholesterol metabolism, membrane dynamics, and Hedgehog signaling without introducing a defined monoclonal mutation. The polyclonal nature ensures a broad representation of gene-disrupted cells, suitable for population-level biochemical and functional studies.
HeLa cells, originally isolated from a cervical epithelial adenocarcinoma, are a widely utilized immortalized cancer cell line. They offer robust growth, ease of genetic manipulation, and extensive characterization in cancer biology, signal transduction, and membrane biophysics. Their rapid proliferation and high membrane turnover make them an ideal platform to study the consequences of impaired cholesterol synthesis on cancer cell physiology, lipid raft integrity, and signaling network dysregulation in a neoplastic context.
At the molecular level, EBP catalyzes the isomerization of zymosterol to lathosterol, a critical step downstream of lanosterol cyclization in the post-squalene segment of cholesterol biosynthesis. This reaction is tightly regulated by upstream SREBP transcription factors, LXR signaling, insulin, and statins. EBP interacts with pathway partners including DHCR7, SC5D, MSMO1, NADPH-cytochrome P450 reductase, and NSDHL, functioning within a biosynthetic sequence driven by HMGCR, SQLE, LSS, CYP51A1, MSMO1, NSDHL, EBP, SC5D, and DHCR7. Disruption of EBP activity leads to accumulation of zymosterol and a deficit in lathosterol production, impairing membrane fluidity and the formation of lipid rafts, which are critical platforms for Hedgehog ligand modification and signal transduction.
In the HeLa cancer cell model, EBP knockout profoundly affects membrane composition and the organization of signaling microdomains. The resulting reduction in cholesterol synthesis compromises lipid raft-dependent processes, including Hedgehog pathway activation, which is often co-opted in tumorigenesis. Consequently, this knockout model enables dissection of how altered sterol metabolism impacts cancer cell proliferation, survival, and therapy susceptibility, linking cholesterol biosynthetic flux to oncogenic signaling in a clinically relevant epithelial adenocarcinoma background.
This knockout cell product is ideally suited for a range of research applications, including cholesterol metabolism studies, X-linked dominant chondrodysplasia punctata modeling, lipid raft dynamics, and Hedgehog pathway analysis. Representative experimental assays include Western blotting and RT-qPCR for pathway component evaluation, fluorescence-based cholesterol quantification, lipid raft isolation by detergent-resistant membrane fractionation, Gli-luciferase reporter assays for Hedgehog activity, proliferation and apoptosis assays, and immunofluorescence microscopy to assess protein localization. For further information on product specification and purchase, please contact Ascent Research.
