The IKBKG Knockout HEK293T Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population engineered for loss-of-function studies of IKBKG, which encodes the NF-??B essential modulator (NEMO). This heterogeneous cell population carries a targeted disruption of the NEMO gene, providing a flexible model for interrogating NEMO-dependent signaling without the constraints of clonal isolation. It is particularly suited for bulk assays such as NF-??B luciferase reporter measurements and cytokine profiling, enabling robust population-level analyses of signaling perturbations.
HEK293T is a human embryonic kidney epithelial cell line stably expressing the SV40 large T antigen, which permits episomal replication of transfected plasmids and yields high recombinant protein expression. Its rapid growth, high transfection efficiency, and adaptability to diverse genetic manipulations have established it as a preferred host for generating knockout populations for detailed biochemical and cell-based signaling studies.
NEMO functions as the non-catalytic scaffold subunit of the I??B kinase (IKK) complex, bridging upstream signals to the kinases IKK?? and IKK??. Stimulation with TNF-??, IL-1??, or LPS triggers recruitment of adaptors such as RIP1, TRAF6, and TAK1, promoting assembly of the IKK complex on activated receptors. NEMO is regulated by linear and K63-linked polyubiquitin chains added by the LUBAC complex and is deubiquitinated by CYLD and A20, which fine-tune pathway output. Activated IKK?? then phosphorylates I??B??, leading to its proteasomal degradation, nuclear translocation of NF-??B, and transcription of pro-inflammatory cytokines (IL-6, TNF-??), chemokines (IL-8), and anti-apoptotic proteins (Bcl-2, Bcl-xL). Negative feedback occurs via NF-??B-driven expression of I??B?? and A20.
In the HEK293T background, disruption of NEMO abolishes canonical NF-??B activation, sensitizing cells to TNF-??-induced apoptosis and enabling dissection of NEMO-dependent versus NEMO-independent pathways. The polyclonal nature facilitates biochemical probing of IKK complex assembly and ubiquitin-dependent regulation, supporting domain-mapping studies through reconstitution with mutant NEMO variants.
These cells can be applied in Western blotting and RT-qPCR to track NF-??B pathway activity, co-immunoprecipitation to examine IKK complex interactions, and luciferase reporter assays for high-throughput screening. They are equally useful for cytokine ELISA, flow cytometric analysis of phospho-I??B??, and cell viability assays under TNF-?? challenge. The model empowers drug discovery efforts targeting NEMO?CIKK interactions in inflammatory diseases and cancer, and supports fundamental research on ubiquitin signaling in innate immunity. For further details, contact Ascent Research.
