The ITGA6 Knockout NCI-H1975 Polyclonal Cells product is a CRISPR/Cas9-edited polyclonal knockout cell population derived from the NCI-H1975 lung adenocarcinoma cell line, featuring targeted disruption of the ITGA6 gene. This polyclonal editing strategy yields a heterogeneous mixture of knockout variants, collectively abrogating integrin ??6 expression while preserving the natural genetic diversity of the host line. It provides a versatile loss-of-function model for investigating integrin biology without the selective bottlenecks associated with monoclonal isolation.
The NCI-H1975 host cell line is an epithelial model of non-small cell lung cancer (NSCLC) originating from a female patient with lung adenocarcinoma. It carries activating EGFR L858R and resistance-associated T790M mutations, making it a key system for studying EGFR-driven oncogenic signaling and kinase inhibitor resistance. As a well-characterized adenocarcinoma line, NCI-H1975 remains dependent on EGFR signaling for proliferation and survival, thus offering a disease-relevant background to dissect adhesion receptor functions in tumor progression.
ITGA6 encodes the ??6 subunit, which forms laminin-binding heterodimers with integrin ??1 or ??4. Ligand engagement with laminins (LAMA5, LAMB1, LAMC1) recruits talin, kindlin, paxillin, and vinculin, activating FAK and Src, and downstream PI3K-Akt and MAPK/ERK cascades. YAP/TAZ transcription factors are also regulated. Upstream EGF and TGF-?? influence ITGA6 expression, and EGFR mutants (L858R/T790M) crosstalk with integrin pathways. Knockout consequently blocks adhesion-induced FAK, Akt, ERK, and YAP/TAZ signaling, reducing migration and survival.
In EGFR-mutant lung adenocarcinoma, integrin ??6-mediated adhesion to laminin-rich extracellular matrix may facilitate tumor cell dissemination and metastatic colonization. Eliminating ITGA6 in the NCI-H1975 background can therefore impair matrix-dependent survival signals, potentially enhancing sensitivity to EGFR tyrosine kinase inhibitors such as osimertinib. The polyclonal nature of the knockout population allows researchers to examine phenotypic heterogeneity and adaptive responses that emerge under selective pressures like drug treatment or altered substrate conditions, offering insights into resistance mechanisms and clonal evolution.
Key research applications include analyzing integrin ??6 functions in cancer cell adhesion, migration, and invasion, particularly within the framework of EGFR-driven lung cancer and therapeutic resistance. Standard assays involve western blotting for ITGA6 and phospho-FAK, adhesion assays on laminin-coated surfaces, transwell migration and Matrigel invasion assays, and flow cytometric analysis of integrin surface expression. Transcriptome profiling via RNA-seq can identify downstream gene expression changes, while combinatorial drug sensitivity testing with EGFR inhibitors uncovers synthetic lethal interactions. For additional product information or ordering, please contact Ascent Research.
