The EEA1 Knockout NCI-H1299 Polyclonal Cells product is a CRISPR/Cas9-edited polyclonal population with disrupted EEA1 gene, providing a loss-of-function model for studying early endosome biology. Derived from the NCI-H1299 human non-small cell lung cancer line, these polyclonal knockout cells offer a genetically heterogeneous editing pool to avoid clonal artifacts while enabling functional analyses of endocytic trafficking.
The NCI-H1299 host cell line originates from a lymph node metastasis of lung carcinoma and is a widely used model for metastatic NSCLC. These cells are null for the tumor suppressor p53, a common alteration in advanced NSCLC associated with genomic instability and apoptosis resistance. Its mesenchymal and invasive properties render NCI-H1299 suitable for evaluating how endosomal perturbations influence cancer cell motility and signal transduction.
EEA1 is a Rab5 effector that specifically binds PI3P on early endosomes, tethering them to promote homotypic fusion and maturation. Activated by Rab5 and PI3K signaling, EEA1 interacts with NSF, syntaxin 13, and SNARE complexes to drive endocytic sorting. It critically governs the trafficking of internalized EGFR, determining its recycling or lysosomal degradation, and thus controls the strength and duration of downstream growth factor signals.
In p53-null NCI-H1299 NSCLC cells, loss of EEA1 disrupts early endosome fusion, impairing EGFR degradation and sustaining pro-survival signaling. This mirrors endocytic dysfunction in many cancers, where altered receptor trafficking contributes to proliferation and drug resistance. The knockout model allows dissection of how spatial signal termination affects tumorigenic properties and enables exploration of endosomal components as therapeutic targets in lung cancer.
The polyclonal knockout product suits studies on endocytic trafficking, receptor kinase downregulation, and intracellular drug delivery. Assays include transferrin uptake, EGFR degradation kinetics by western blot, EEA1 colocalization by confocal microscopy, and co-immunoprecipitation of Rab5/SNARE complexes. It also supports high-content screening for modulators of endosomal sorting. For additional details, contact Ascent Research.
