The APOE Knockout HeLa Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population derived from the widely used HeLa cell line, carrying a targeted disruption of the human APOE gene. This polyclonal pool contains a heterogeneous mix of edited alleles, providing a robust loss-of-function model without clonal selection. The CRISPR/Cas9-mediated gene disruption abolishes endogenous APOE expression, enabling investigation of APOE-dependent processes in a human cervical adenocarcinoma background.
HeLa cells are an immortalized human cell line originating from HPV18-positive cervical adenocarcinoma, extensively employed in cancer research, virology, and protein expression studies. Their robust growth characteristics and ease of manipulation make them a versatile platform for studying gene function, signaling pathways, and cellular responses to stress. The epithelial origin and transformed nature of HeLa cells offer a relevant context for examining the role of APOE in epithelial cell biology and cancer-related processes.
APOE encodes apolipoprotein E, a critical glycoprotein involved in lipid transport, cholesterol homeostasis, and neuronal repair. APOE functions as a ligand for the LDL receptor family (LDLR, LRP1) and interacts with heparan sulfate proteoglycans, mediating the clearance of triglyceride-rich lipoproteins. Transcriptionally regulated by LXR, PPAR??, and RXR, and responsive to inflammatory cytokines such as TNF?? and IL-1??, APOE modulates cholesterol efflux via downstream targets ABCA1 and ABCG1. Additionally, APOE influences amyloid-?? clearance and tau phosphorylation, intersecting with pathways relevant to Alzheimer’s disease. It forms complexes with clusterin and participates in lipid redistribution within the central nervous system and peripheral tissues.
In the HeLa cell context, APOE knockout disrupts normal cholesterol transport and lipid raft composition, potentially altering membrane fluidity and receptor signaling. Loss of APOE-mediated lipid homeostasis may impair cellular responses to oxidative stress and inflammation, given its protective roles in neurons and immune cells. This model allows dissection of APOE??s contributions to lipid metabolism independent of its systemic functions, revealing intrinsic cellular mechanisms. Furthermore, HeLa cells?? cancerous origin provides a unique opportunity to study APOE??s emerging roles in the tumor microenvironment, where it may modulate cancer cell proliferation, migration, and immune evasion.
Typical research applications include Alzheimer??s disease studies, lipid metabolism assays, and drug screening for neuroprotective compounds. The polyclonal knockout population can be used in cholesterol efflux and BODIPY-cholesterol uptake assays to quantify lipid handling, or in immunofluorescence imaging of lipid droplets. Migration and invasion assays, along with apoptosis evaluation by Annexin V staining, help elucidate APOE??s impact on cancer cell behavior. Western blotting and RT-qPCR confirm APOE ablation. This product is suitable for vaccine production processes and target validation studies. For further details and batch-specific information, please contact Ascent Research.
