The ITGB1 Knockout HEK293T Polyclonal Cells are a polyclonal knockout population generated by CRISPR/Cas9-mediated disruption of the ITGB1 gene in the HEK293T cell line. This gene encodes integrin beta-1, a critical subunit mediating cell-extracellular matrix adhesion. The knockout pool provides a powerful loss-of-function system to dissect ??1 integrin signaling without clonal bias.
HEK293T is a human embryonic kidney cell line immortalized with SV40 large T antigen. These epithelial-derived cells are characterized by high transfection efficiency, robust protein expression, and well-defined growth properties, making them a preferred host for genetic manipulation. Their endogenous expression of integrins and associated signaling components provides a physiologically relevant background to study ??1 integrin functions in adhesion, migration, and signal transduction.
Integrin beta-1 (ITGB1) heterodimerizes with various alpha subunits to form receptors for extracellular matrix proteins such as fibronectin, laminin, and collagen. Upon ligand binding, ??1 integrins cluster and recruit talin-1 (TLN1) and kindlin-1 (FERMT1), triggering conformational activation and assembly of focal adhesion complexes that include vinculin (VCL), paxillin (PXN), and filamin A (FLNA). These complexes facilitate autophosphorylation of focal adhesion kinase (FAK/PTK2) at Y397, which recruits SRC family kinases, leading to activation of the MAPK/ERK and PI3K-AKT cascades through adaptor proteins such as BCAR1, CRK, and DOCK1. Downstream, signaling modulates transcription factors that regulate expression of CCND1 and MYC, ultimately controlling cell proliferation, survival, and migration. Integrin ??1 also interacts with RAP1A and APBB1IP, linking to cytoskeletal reorganization and adhesion turnover.
In the HEK293T background, disruption of ITGB1 abrogates ??1 integrin-dependent adhesion and the associated downstream signaling, severely impairing cell spreading, migration, and matrix-dependent survival. Because HEK293T cells possess an epithelial phenotype, ITGB1 knockout provides a valuable tool to investigate epithelial-mesenchymal transition (EMT) mechanisms, where integrin switching is a hallmark. This model allows researchers to uncouple ??1 integrin-specific functions from those mediated by other integrin subunits, enabling detailed structure-function analyses of adhesion receptor signaling in a simplified, tractable system.
Applications of these polyclonal ITGB1 knockout cells span cancer biology, where ??1 integrin promotes metastasis and drug resistance, fibrosis research involving aberrant matrix deposition, and cardiovascular and inflammatory disease studies probing endothelial and immune cell adhesion. Typical assays include cell adhesion and migration assays on specific ECM ligands, immunofluorescence staining for focal adhesion markers (paxillin, vinculin), phospho-FAK (Y397) western blotting to assess integrin activation, and flow cytometric quantification of surface ??1 integrin. The polyclonal nature permits evaluation of population-level responses while minimizing artifacts from single-cell isolation. For additional technical specifications or inquiries, please contact Ascent Research.
