The IKBKB Knockout AGS Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the AGS human gastric adenocarcinoma cell line, featuring targeted disruption of IKBKB, which encodes the catalytic IKK?? subunit of the IKK complex. This product is generated using validated CRISPR/Cas9 methodology to introduce loss-of-function mutations across the cell pool, ensuring a heterogeneous gene?edited population. The polyclonal format minimizes clonal artifacts and enables robust population?level analyses of IKBKB-deficient phenotypes. As such, it provides a reliable, genetically defined system for investigating canonical NF???B signaling in a gastric epithelial context.
AGS is an adherent gastric adenocarcinoma cell line of female origin, widely employed in cancer research to study gastric cancer pathogenesis, signal transduction, and therapeutic responses. These cells retain characteristic gastric epithelial features and are sensitive to pro?inflammatory cytokines, establishing them as a physiologically appropriate host for examining IKK???dependent NF???B functions in gastric carcinogenesis and inflammatory signaling.
IKBKB encodes IKK??, the catalytic subunit of the IKK complex, which also includes the regulatory subunit NEMO (IKBKG) and the kinase IKK?? (CHUK). Upstream signals such as TNF??, IL?1??, and Toll?like receptor ligands activate IKK?? via adaptors TRAF6 and kinases TAK1 and NIK, leading to phosphorylation of I??B?? and its ubiquitin?dependent degradation. This liberates NF???B p65/RelA to enter the nucleus and promote transcription of target genes like IL?6, IL?8, TNF??, Bcl?2, Bcl?xL, and cyclin D1. IKK?? also interacts with ???catenin, linking NF???B to Wnt signaling.
In AGS gastric adenocarcinoma cells, NF???B is frequently constitutively active, contributing to uncontrolled proliferation, evasion of apoptosis, and chemoresistance. IKBKB knockout in this background permits rigorous dissection of IKK???dependent mechanisms that drive gastric cancer progression and inflammation?associated tumorigenesis. The documented interaction between IKK?? and ???catenin further enables exploration of NF???B/Wnt pathway cross?talk, which is commonly implicated in gastric cancer. Consequently, this model is valuable for assessing the therapeutic potential of IKK inhibitors and investigating resistance mechanisms to existing therapies.
Standard applications include Western blot analysis of IKBKB, I??B??, and phospho?I??B?? to validate IKK?? loss and downstream signaling attenuation; RT?qPCR for NF???B target genes (e.g., IL?6, IL?8); NF???B luciferase reporter assays; immunofluorescence staining for p65 subcellular localization; ELISA?based cytokine quantification; and Annexin V apoptosis assays. Migration and invasion assays enable studies on EMT and metastatic behavior, while drug sensitivity testing and phospho?kinase arrays support inhibitor screening and resistance profiling. These polyclonal knockout cells are also suitable for co?culture experiments and in vivo xenograft models. For technical support, please contact Ascent Research.
