The Ifnar1 Knockout B16-F10 Cell Line is a CRISPR/Cas9-edited knockout cell line derived from the C57BL/6 mouse melanoma B16-F10 line, featuring disruption of the Ifnar1 gene encoding the type I interferon receptor subunit IFNAR1. This loss-of-function model eliminates type I interferon responsiveness, providing a defined genetic background for studying interferon signaling in melanoma biology.
The parental B16-F10 cell line is a widely used highly metastatic melanoma model in syngeneic C57BL/6 mice, forming primary tumors and spontaneous metastases. It serves as an essential platform for investigating metastasis mechanisms and evaluating immunotherapies, including immune checkpoint inhibitors.
IFNAR1, in complex with IFNAR2, is activated by type I interferons IFN-?? and IFN-?? and downstream of pattern recognition receptor agonists such as poly(I:C). Ligand-bound receptor activates JAK1 and TYK2 kinases, which phosphorylate STAT1 and STAT2. These STATs assemble with IRF9 to form the ISGF3 complex, which translocates to the nucleus and binds ISRE elements, inducing interferon-stimulated genes (ISGs) like Mx1, Oas1, and Ifit1. This pathway underpins antiviral defense, immunomodulation, and upregulation of MHC class I. Disruption of Ifnar1 abolishes this signaling, blocking ISG expression and reducing interferon-driven MHC class I presentation, a trait that may facilitate tumor immune evasion.
In the B16-F10 context, Ifnar1 knockout allows dissection of how melanoma cells exploit interferon signaling defects to escape immune detection. The model is valuable for examining the role of type I interferon in tumor progression, metastasis, and response to immunotherapy. It enables direct testing of tumor cell-intrinsic interferon effects separate from host immune signaling.
Researchers can employ this cell line for western blotting of IFNAR1 and phosphorylated STAT1 to verify pathway inactivation, flow cytometry for surface MHC class I, and qPCR or RNA-seq to assess ISG induction. In vivo syngeneic tumor models permit analysis of growth kinetics and metastasis, while coculture assays reveal altered interactions with T cells and NK cells. The model also supports development of IFNAR1-targeted therapies and viral infection studies. For further inquiries, contact Ascent Research.
