The IRAK4 Knockout HEK293T Polyclonal Cells product comprises a population of HEK293T cells genetically modified using CRISPR/Cas9 to disrupt the IRAK4 gene. This polyclonal knockout cell pool provides a heterogeneous loss-of-function model for investigating IRAK4-dependent signaling without clonal selection. The gene editing is designed to abolish functional IRAK4 protein expression, enabling researchers to study the consequences of IRAK4 deficiency in a human cellular context.
The host cell line, HEK293T, is a widely used human embryonic kidney cell derivative that stably expresses adenovirus E1A and SV40 large T antigen. This background confers robust episomal amplification of transfected plasmids and supports high-level recombinant protein production, making it a versatile platform for transient expression and viral packaging. The cells retain key components of innate immune signaling pathways, providing a relevant system for dissecting TLR and IL-1R signal transduction.
IRAK4 encodes a serine/threonine-protein kinase that serves as an essential signal transducer downstream of Toll-like receptors (TLRs) and the interleukin-1 receptor (IL-1R). Upon ligand engagement, IRAK4 is recruited to the receptor complex via the adaptor MyD88. There, it phosphorylates and activates IRAK1, initiating a signaling cascade that recruits TRAF6 and TAK1, leading to activation of the IKK complex and MAPKs. These events culminate in the nuclear translocation of NF-??B and AP-1 transcription factors, driving the expression of pro-inflammatory cytokines such as TNF-?? and IL-6. IRAK4 also interacts with IRAK2, Pellino-1, and TRAF6, forming a MyDDosome complex critical for signal amplification.
Disruption of IRAK4 in HEK293T cells effectively uncouples MyD88-dependent responses from downstream effector pathways. Given the cell line??s intact TLR and IL-1R signaling machinery, this knockout model enables precise interrogation of IRAK4-specific functions without confounding effects from redundant kinases. The system is particularly suited for studying the molecular events linking receptor activation to cytokine synthesis and for validating chemical inhibitors targeting IRAK4 in inflammatory diseases.
This IRAK4 knockout model supports a wide range of experimental applications, including innate immune signaling dissection, quantitative cytokine profiling via ELISA, and analysis of NF-??B activation through reporter assays. It is also valuable for phospho-signaling arrays to map IRAK4-dependent kinase networks and for co-immunoprecipitation studies to probe protein?Cprotein interactions within the MyDDosome. Additionally, the cells can be employed in bacterial challenge assays to model host?Cpathogen interactions relevant to immunodeficiency research. For further details, please contact Ascent Research.
