The ITGB1 Knockout AGS Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population generated from the AGS human gastric epithelial cell line, targeting disruption of the ITGB1 gene. This pooled knockout model provides a heterogeneous loss-of-function system for investigating integrin ??1-mediated processes without clonal selection, enabling the study of population-level responses. The CRISPR/Cas9-mediated gene disruption serves as a versatile tool to interrogate cell adhesion, migration, and signaling pathways dependent on ITGB1 function.
The AGS host cell line was originally established from a gastric adenocarcinoma of a 54-year-old female donor and is widely employed as an in vitro model for gastric cancer research and Helicobacter pylori infection studies. AGS cells retain characteristics of gastric mucosal epithelial cells, offering a relevant background to examine oncogenic signaling, host-pathogen interactions, and gastric epithelial biology. Their adherent growth and epithelial morphology make them suitable for adhesion and migration assays.
ITGB1 encodes integrin ??1, a transmembrane receptor that forms obligate heterodimers with various ?? integrin subunits (such as ITGA1, ITGA2, ITGA3, ITGA5, and ITGA6) to mediate cell-extracellular matrix and cell-cell adhesion. Integrin ??1 engagement by extracellular ligands including fibronectin, laminin, and collagen triggers inside-out activation via talin and kindlin, and outside-in signaling cascades. Key downstream effectors include focal adhesion kinase (FAK) and SRC family kinases, which activate PI3K/AKT and MAPK/ERK pathways, influencing proliferation, survival, and cytoskeletal reorganization via RAC1 and ROCK. ITGB1 also cross-talks with growth factor receptors such as EGFR and VEGFR, integrating signals that regulate transcription factors like YAP and SNAI1 to control survival (BIRC5) and EMT programs.
In the AGS gastric cancer context, ITGB1 disruption is particularly significant for dissecting mechanisms of gastric adenocarcinoma progression and metastasis. Loss of integrin ??1 impairs focal adhesion dynamics and downstream signaling, potentially attenuating migratory and invasive properties driven by the tumor microenvironment. This model enables the study of ITGB1-dependent resistance to anoikis, modulation of drug sensitivity, and epithelial-mesenchymal transition (EMT), all of which are critical in gastric cancer pathology. Moreover, it facilitates the investigation of crosstalk with H. pylori virulence factors that exploit integrin-mediated pathways for host cell interaction.
This polyclonal knockout cell population is suitable for a broad range of functional assays, including cell adhesion to matrices, Boyden chamber migration and invasion experiments, and immunofluorescence visualization of focal adhesions. Users can validate protein-level knockout via western blotting for ITGB1 and assess downstream signaling changes through phospho-specific antibodies against FAK (Tyr397) and AKT (Ser473). Additional applications include flow cytometric analysis of integrin surface expression, apoptosis assays to evaluate survival dependency, and colony formation assays to gauge clonogenic potential. The heterogeneous nature of the polyclonal pool allows assessment of bulk population behavior, which is advantageous for studying collective cell responses. For further details, please contact Ascent Research.
