JUN Knockout AGS Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the AGS human gastric adenocarcinoma line. This heterogeneous pool of cells features targeted disruptions of the JUN gene, providing a versatile loss-of-function model for pooled screening and pathway analysis. The polyclonal format retains biological diversity and avoids clonal artifacts, making it suitable for interrogating JUN-dependent mechanisms in gastric cancer research.
The AGS cell line, originally isolated from a human gastric adenocarcinoma, grows as an adherent epithelial monolayer. It is extensively employed in studies of gastric cancer pathogenesis, Helicobacter pylori infection, and drug sensitivity. The AGS background harbors intrinsic dysregulation of mitogenic and survival signaling, offering a physiologically relevant setting in which to dissect the contributions of AP-1 transcription factor activity to tumor cell behavior.
JUN encodes c-Jun, a principal AP-1 transcription factor activated by phosphorylation through JNK1/2/3 and ERK1/2 in response to growth factors (EGF, PDGF), cytokines (TNF-alpha, IL-1beta), and stress. Phosphorylated c-Jun dimerizes with partners such as c-FOS, ATF2, or SMAD3 to regulate transcription. Target genes include CCND1 (cell cycle), BCL2 and BCL2L1 (survival), VEGFA (angiogenesis), and MMP1/MMP9 (invasion). c-Jun also recruits coactivators p300/CBP and participates in feedback loops via DUSP1, integrating multiple signaling inputs to control cell proliferation, apoptosis, and differentiation.
In gastric malignancy, hyperactive JUN drives proliferation, survival, and metastasis, underpinning tumor aggressiveness and drug resistance. Knocking out JUN in AGS cells permits direct evaluation of AP-1-dependent transcriptional programs in a gastric epithelial context. This model supports functional studies of growth, apoptosis, and invasiveness, and aids in validating inhibitors targeting the JNK/c-Jun pathway as potential antitumor strategies.
Researchers commonly employ these cells for Western blot detection of phospho-c-Jun (Ser63/73) and total c-Jun, RT?qPCR profiling of AP-1 targets like CCND1, and luciferase reporter assays using AP-1 response elements. Downstream phenotypic analyses include cell viability (MTT/CCK-8), apoptosis (Annexin V), and migration/invasion (Transwell) assays. Additionally, ChIP?qPCR maps c-Jun occupancy at target promoters, while immunofluorescence visualizes its nuclear translocation. These tools enable comprehensive dissection of JUN-mediated signaling in gastric cancer. For technical inquiries, please contact Ascent Research.
