The IFT46 Knockout A-549 Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population derived from the A-549 human lung adenocarcinoma cell line. This product offers a loss-of-function model for the IFT46 gene, which encodes an essential component of intraflagellar transport complex B (IFT-B). Disruption of IFT46 impairs assembly of the IFT-B complex, providing a versatile tool for studying ciliary biology and associated signaling pathways in a lung epithelial context. The polyclonal nature of the knockout pool retains heterogeneous editing events, avoiding clonal selection artifacts and enabling robust population-level analyses.
A-549 cells serve as a well-established model of type II alveolar epithelial cells, originally isolated from a 58-year-old Caucasian male with lung adenocarcinoma. They recapitulate key features of alveolar epithelium, including surfactant production and epithelial morphology, and are extensively used to study lung adenocarcinoma biology, respiratory disease mechanisms, and alveolar cell function. Their adherent growth characteristics and compatibility with standard transfection and imaging protocols make them a robust host for CRISPR-based knockout studies.
IFT46 is an indispensable IFT-B subunit that interacts with IFT52 and IFT88 to enable intraflagellar transport within primary cilia. Its expression is regulated by RFX transcription factors and FOXJ1, master regulators of ciliogenesis. IFT46-dependent trafficking is crucial for Hedgehog signaling, mediating ciliary localization of SMO, PTCH1, and activation of GLI1/GLI2 transcription factors. IFT46 also interacts with motor subunits KIF3A and DYNC2H1, linking the IFT-B complex to microtubule-based movement. Consequently, disruption of IFT46 impairs cilium formation and attenuates Hedgehog pathway output, potentially affecting proliferation and differentiation.
In A-549 cells, IFT46 knockout provides a physiologically relevant platform to investigate the role of primary cilia and Hedgehog signaling in lung adenocarcinoma. As cilia are known to influence tumor cell proliferation, migration, and therapeutic sensitivity, ablating IFT46 allows precise dissection of these pathways. The model further permits exploration of ciliopathy-related gene functions, such as those mutated in short rib-polydactyly syndrome, within an epithelial context.
Researchers can employ this knockout pool in Western blotting and RT-qPCR to confirm IFT46 depletion, immunofluorescence for ciliary markers (acetylated tubulin, ARL13B), and Hedgehog reporter assays. Functional studies may include proliferation, migration, and colony formation assays to assess the impact of IFT46 loss on A-549 cell behavior. Pharmacological agents targeting Hedgehog components can be combined to further validate pathway involvement. For technical support or additional details, contact Ascent Research.
