The GPRIN1 Knockout NCI-H1975 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population originating from the NCI-H1975 lung adenocarcinoma cell line. These cells feature targeted disruption of the GPRIN1 gene, producing a heterogeneous loss-of-function model suitable for population-level assays. Unlike clonal lines, the polyclonal format minimizes selection artifacts while maintaining robust gene disruption across the culture. This format ensures consistent gene disruption suitable for high-throughput screening and reproducible phenotypic assays.
NCI-H1975 is a well-established model of non-small cell lung cancer (NSCLC) derived from a female patient. It carries activating mutations in EGFR and PIK3CA, making it a standard platform for studying oncogenic signaling, tumor progression, and drug resistance in lung adenocarcinoma. The adherent epithelial cells are widely used in both academic and pharmaceutical research. The cell line is a cornerstone in translational NSCLC research, frequently employed to evaluate targeted therapies and resistance mechanisms.
GPRIN1 functions downstream of GPCRs coupled to G??12/13 subunits, directly binding actin and recruiting actin-binding proteins such as Filamin A and Spinophilin. It regulates actin cytoskeleton dynamics by modulating Rho family GTPases??RhoA, Rac1, and CDC42??which control actin polymerization and stress fiber formation. Through interactions with GNA12, GNA13, and adenylate cyclase, GPRIN1 links GPCR activation to RhoGEF-mediated signaling and cytoskeletal rearrangement. While classically associated with neurite outgrowth and neurotrophin signaling, GPRIN1??s actin-regulatory role extends to non-neuronal contexts, including tumor cell migration.
In NCI-H1975 cells, GPRIN1 knockout offers a powerful tool to investigate GPCR-driven cytoskeletal remodeling in a NSCLC background carrying EGFR and PIK3CA mutations. Disruption of GPRIN1 is expected to impair actin reorganization necessary for cell migration and invasion, potentially impacting metastatic potential and therapeutic responses. This model thus enables exploration of non-canonical functions of a neuronal regulator in cancer biology.
Typical applications include Western blot and RT-qPCR confirmation of knockout, Transwell migration/invasion assays, and immunofluorescence visualization of F-actin and stress fibers. Co-immunoprecipitation of GNA12 or Filamin A can assess altered interactions, while Rho GTPase activation assays quantify signaling changes. Wound healing, proliferation, and drug sensitivity assays further support mechanistic and pharmacological studies. These integrated approaches enable comprehensive dissection of GPRIN1 function in NSCLC biology. For additional information, contact Ascent Research.
