The INF2 Knockout NCI-H1975 Polyclonal Cells are a CRISPR/Cas9-mediated gene disruption product targeting the INF2 locus in the NCI-H1975 human lung adenocarcinoma cell line. As a polyclonal cell population, this knockout model contains a heterogeneous mix of editing outcomes, providing a robust loss-of-function system for studying INF2-dependent cellular mechanisms without the biases associated with clonal isolation. This format is particularly useful for examining pooled phenotypic effects in cancer biology applications.
The NCI-H1975 parental line originates from a non-small cell lung carcinoma with epithelial morphology, endogenously expressing EGFR with the L858R/T790M double mutation and harboring a TP53 mutation. These genetic alterations confer oncogene addiction to EGFR signaling and resistance to first-generation tyrosine kinase inhibitors, making NCI-H1975 a standard model for investigating EGFR-mutant lung adenocarcinoma biology and therapeutic vulnerabilities.
INF2 belongs to the formin family of actin nucleators, primarily generating linear actin filaments downstream of RhoA and Cdc42 GTPase activation. At endoplasmic reticulum?Cmitochondria contact sites, INF2-driven actin polymerization recruits DRP1 to promote mitochondrial fission, a process critical for mitochondrial quality control and apoptosis. In focal adhesions, INF2 cooperates with Spire1/2 and myosin II to orchestrate actin assembly, influencing focal adhesion kinase (FAK) phosphorylation and turnover. This activity modulates YAP/TAZ mechanosensitive transcriptional programs, linking cytoskeletal physical cues to gene expression. Additionally, interactions with ERM proteins and PLC?? position INF2 at the nexus of Rho GTPase signaling, calcium regulation, and actin remodeling.
In the context of NCI-H1975 cells, INF2 knockout is anticipated to impair actin-driven cellular processes such as lamellipodial protrusion, focal adhesion maturation, and mitochondrial network dynamics. Disruption of these pathways may suppress migratory and invasive capacity, potentially reducing metastatic traits. Furthermore, altered mitochondrial fission could affect cellular energy metabolism and apoptotic priming, interacting with the oncogenic EGFR signaling axis. Thus, this knockout model serves as a platform to probe functional crosstalk between cytoskeletal reorganization, mitochondrial homeostasis, and oncogenic signaling in lung adenocarcinoma.
Researchers can leverage these polyclonal knockout cells for diverse experimental applications. Migration and invasion can be quantified using wound healing and Matrigel invasion assays, while confocal microscopy enables detailed visualization of F-actin architecture and mitochondrial morphology. Western blotting for actin, DRP1, and phosphorylated FAK, alongside Rho GTPase activation assays and co-immunoprecipitation for INF2 interactors, provides a comprehensive toolkit for signaling analysis. The model is well-suited for mechanotransduction studies, focal adhesion biology, and mitochondrial fission research in a cancer-relevant context, as well as for modeling diseases linked to INF2 mutations such as focal segmental glomerulosclerosis and Charcot-Marie-Tooth disease. For further details or technical support, please contact Ascent Research.
