The IFIT2 Knockout NCI-H1975 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population derived from the human NCI-H1975 lung adenocarcinoma epithelial cell line. This model enables stable loss-of-function studies of IFIT2, an interferon-stimulated gene essential for antiviral defense and tumor biology. CRISPR/Cas9-mediated disruption generates a heterogeneous knockout pool, avoiding clonal artifacts and maintaining population diversity suitable for pooled screens and bulk assays.
The parental NCI-H1975 line is a non-small cell lung cancer model from a female never-smoker, carrying activating EGFR L858R and PIK3CA mutations. These epithelial cells are sensitive to EGFR TKIs, making them a standard platform for targeted therapy research. This genetic context allows dissection of interferon signaling interplay with oncogenic kinase pathways. The IFIT2 knockout thus provides a relevant backdrop for examining immune-tumor crosstalk in lung adenocarcinoma.
IFIT2 is upregulated by interferons (IFN-??, IFN-??, IFN-??) via JAK-STAT signaling through IFNAR, JAK1, TYK2, and the ISGF3 complex (STAT1, STAT2, IRF9), as well as IRF3, IRF7, and NF-??B. It restricts viral replication by sequestering viral RNA and inhibiting eIF3-dependent translation initiation. IFIT2 also promotes apoptosis via pro-apoptotic factors, regulates cell migration, and modulates inflammatory responses. Key interactors include IFIT1, IFIT3, tubulin, STAT1, and STAT2, linking it to both antiviral and cancer-relevant pathways.
In the context of EGFR L858R-mutant lung cancer, IFIT2 knockout allows examination of how interferon signaling contributes to drug sensitivity and tumor cell fitness. The interaction between IFIT2-regulated apoptosis and EGFR-driven survival pathways may influence responses to EGFR TKIs. Furthermore, IFIT2-mediated inflammation and migration could affect the tumor microenvironment, making this model valuable for studies of immune evasion and metastasis.
Applications include interferon stimulation assays assessing JAK-STAT pathway activity, viral replication inhibition studies, and apoptosis profiling via caspase-3/7 activation. The polyclonal knockout cells are suitable for Western blotting, RT-qPCR, RNA-seq, and cell proliferation and migration assays. Drug sensitivity testing with EGFR inhibitors can reveal IFIT2-dependent chemosensitization or resistance mechanisms. For researchers investigating innate antiviral immunity, cancer biology, or inflammatory disorders, this model provides a versatile and robust experimental system. For further information, please contact Ascent Research.
