The IFT25 Knockout A-549 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the A-549 human lung adenocarcinoma cell line, engineered for targeted disruption of the IFT25 gene. This loss-of-function model enables the study of IFT25-dependent cellular processes without the constraints of monoclonal selection, providing a heterogeneous population that reflects the complexity of gene knockout across multiple genetic backgrounds.
The A-549 host cell line is a widely established model of human type II alveolar epithelial cells, isolated from a lung adenocarcinoma. A-549 cells retain key epithelial characteristics and are extensively used in cancer biology research, including studies of tumor cell proliferation, migration, and drug response. Their use in conjunction with CRISPR/Cas9-mediated gene disruption allows direct interrogation of gene function in a lung adenocarcinoma context.
IFT25 is a core component of the intraflagellar transport complex B (IFT-B), essential for anterograde ciliary transport and primary cilia assembly. IFT25 interacts directly with complex members IFT27, IFT46, and IFT52, and associates with kinesin-2 and dynein-2 motors to facilitate ciliary trafficking. Disruption of IFT25 impairs ciliogenesis and attenuates cilia-dependent Hedgehog signaling, leading to reduced activation of downstream GLI1 and GLI2 transcription factors. IFT25 function is regulated by RFX transcription factors such as RFX2 and RFX3, and its loss also affects Wnt pathway components including LEF/TCF factors. The representative pathway components SMO, PTCH1, SUFU, IFT88, and IFT140 further illustrate its central role in ciliary signaling networks.
In the A-549 lung adenocarcinoma background, IFT25 knockout provides a unique platform to investigate the role of primary cilia and cilia-dependent signaling in cancer cell biology. Since A-549 cells can form primary cilia under certain conditions, the loss of IFT25 allows researchers to dissect ciliary contributions to tumorigenic processes such as proliferation and migration. This model is particularly relevant for understanding the intersection of ciliogenesis and oncogenic signaling in lung cancer.
These polyclonal knockout cells are suitable for a variety of research applications, including cilia biology, Hedgehog signaling pathway analysis, ciliopathy disease modeling, and lung cancer studies. Functional assays may include immunofluorescence staining for cilia markers like acetylated tubulin, ARL13B, and gamma-tubulin; western blotting for IFT25 and GLI1; RT-qPCR for Hedgehog target genes such as GLI1 and PTCH1; cilia formation assays; cell migration assays; and drug sensitivity screens. For further information, please contact Ascent Research.
