The KIF16B Knockout A-549 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal cell population derived from the A-549 human lung adenocarcinoma line, with disruption of the KIF16B gene, encoding a plus-end microtubule motor. This heterogeneous knockout system enables population-based analysis of KIF16B loss in an epithelial cancer model, achieved through Cas9-mediated gene targeting.
A-549 cells, derived from lung adenocarcinoma tissue, serve as a model for alveolar type II pneumocytes, maintaining key epithelial features like tight junctions and surfactant protein expression. They are widely used in cancer research, drug metabolism, and barrier studies, carrying a KRAS mutation and wild-type p53. This background facilitates investigation of lung cancer progression, metastasis, and therapeutic response, making it suitable for examining KIF16B’s role in endosomal trafficking and migration.
KIF16B is a kinesin-3 motor that transports early endosomes to the perinuclear recycling compartment, driven by PI3P binding via its PX domain and interaction with Rab14. It regulates endocytic recycling of receptors such as EGFR and integrins, affecting their surface levels and signaling. Under EGF stimulation and PI3K activation, KIF16B-mediated trafficking modulates downstream processes like focal adhesion turnover and cell migration. Knockout of KIF16B thus disrupts receptor distribution and signaling dynamics, providing a tool to dissect these interrelated pathways.
In A-549 cells, loss of KIF16B impairs EGFR and integrin recycling, reducing surface receptor levels and attenuating signal transduction. This is expected to hinder EGFR-dependent proliferation and migration, affecting wound healing and invasion. The ability of A-549 cells to form polarized monolayers and undergo dynamic focal adhesion turnover provides a relevant platform to study KIF16B’s role in cell-matrix interactions and barrier integrity. The polyclonal knockout population captures phenotypic heterogeneity, mirroring tumor cell variability.
The KIF16B Knockout A-549 Polyclonal Cells support diverse assays: live-cell imaging of endosome dynamics, scratch migration tests, and EGFR degradation measurements to assess receptor trafficking. Co-immunoprecipitation of Rab14 and endosomal markers, along with immunofluorescence of early/recycling endosomes, can reveal altered interactions and spatial defects. This model is suitable for drug resistance studies linked to receptor recycling and screening of endocytic pathway modulators. Contact Ascent Research for technical assistance and customization options.
