The IFNGR1 Knockout Jurkat Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population with targeted disruption of the IFNGR1 gene, encoding the interferon gamma receptor alpha chain. Delivered as a polyclonal pool, these cells circumvent the need for single-cell cloning and reflect the spectrum of gene-editing outcomes across the population. This product provides a loss-of-function model for investigating interferon gamma signaling pathways in a well-characterized T-lymphocyte background.
The host Jurkat cell line is a human T-cell leukemia line established from a patient with acute lymphoblastic leukemia. These immortalized T lymphocytes are a standard model for T-cell receptor signaling, apoptosis, and cytokine responses, due to their robust growth and ease of manipulation. They are particularly suited for suspension-based assays, including flow cytometry, reporter gene assays, and phospho-signaling studies. Their genetic tractability makes them an ideal platform for CRISPR/Cas9-mediated gene targeting.
IFNGR1 forms the ligand-binding subunit of the interferon gamma receptor, partnering with IFNGR2 to initiate signaling upon interferon gamma (IFNG) binding. Ligand engagement triggers activation of JAK1 and JAK2 kinases, leading to phosphorylation and nuclear translocation of STAT1. This induces transcription of downstream targets including IRF1, CIITA, SOCS1, and the chemokines CXCL9 and CXCL10, while also upregulating MHC class I and II genes. IFNGR1 thus functions as a critical mediator of innate and adaptive immunity, regulating antimicrobial defenses, antigen presentation, and Th1 immune responses. Dysregulation is linked to immunodeficiency and susceptibility to mycobacterial and viral infections.
In the Jurkat T-lymphocyte context, IFNGR1 knockout abrogates the primary IFNG receptor, blocking JAK-STAT signaling and enabling dissection of IFNG-dependent T-cell functions. This model is valuable for studying how interferon gamma influences T-cell activation, differentiation, and immune synapse formation. The polyclonal format preserves cellular heterogeneity, simulating physiological variability and facilitating population-level analyses. It serves as a relevant system to explore the role of IFNG signaling in T-cell-mediated immunity.
Typical applications include western blotting for STAT1 phosphorylation, RT-qPCR for IRF1 and CXCL10, and flow cytometric analysis of MHC class I surface expression. The cells can be employed in ISRE reporter assays, co-immunoprecipitation of IFNGR1-JAK1 complexes, and drug sensitivity screening for JAK inhibitors. These tools aid research in immunodeficiency 27B, Mendelian susceptibility to mycobacterial disease, viral pathogenesis, and inflammatory disorders. For additional product details or technical assistance, please contact Ascent Research.
