The GNG10 Knockout NCI-H1975 Polyclonal Cells comprise a CRISPR/Cas9-edited polyclonal knockout population designed to disrupt the GNG10 gene in the NCI-H1975 human non-small cell lung adenocarcinoma cell line. This heterogeneous pool of edited cells serves as a powerful tool for functional genomics, enabling the investigation of GNG10-dependent signaling without clonal artifacts.
The host NCI-H1975 cell line is a widely used epithelial model of human lung adenocarcinoma, isolated from a female patient. It harbors an activating EGFR T790M mutation in the kinase domain and exhibits MET gene amplification, two key molecular features associated with acquired resistance to first- and third-generation EGFR tyrosine kinase inhibitors. Therefore, it provides a clinically relevant platform to study oncogenic signaling networks in EGFR-mutant non-small cell lung cancer.
GNG10 encodes the gamma-10 subunit of heterotrimeric G proteins, which assembles with GNB1 or GNB2 to form the G?¦? dimer. Upon activation of upstream GPCRs by ligands such as lysophosphatidic acid (LPA) acting on LPAR receptors or chemokine SDF-1?? (CXCL12) binding CXCR4, the heterotrimer dissociates, releasing G?¦?. Free G?¦? directly activates phosphoinositide 3-kinase (PI3K), leading to AKT1 phosphorylation, and stimulates the RAF-MEK-ERK cascade, resulting in MAPK1 (ERK2) and MAPK3 (ERK1) phosphorylation. Additionally, G?¦? regulates phospholipase C ?? (PLCB) isoforms, triggering IP3-mediated calcium release. The GNG10-containing dimer interacts with G?? subunits including GNAI1 and GNAQ and is modulated by RGS proteins. Consequently, GNG10 operates as a central signaling node linking extracellular stimuli to proliferation and survival pathways.
In the NCI-H1975 background, GNG10-mediated GPCR signaling can intersect with the EGFR-driven oncogenic network. EGFR-mutant lung adenocarcinomas may rely on GPCR-G?¦? inputs to sustain PI3K/AKT and MAPK/ERK activity, thereby bypassing EGFR blockade. Disrupting GNG10 allows researchers to isolate the specific contribution of G?¦?-dependent signals to cell proliferation, survival, and motility, and to delineate crosstalk between receptor tyrosine kinases and GPCRs. This model is particularly useful for probing mechanisms of intrinsic and acquired resistance to EGFR inhibitors and for evaluating the functional roles of G?¦? in the context of MET co-amplification.
Typical applications include stimulation with GPCR agonists (LPA, SDF-1??) followed by Western blot analysis of phospho-AKT (Ser473) and phospho-ERK (Thr202/Tyr204), MTS proliferation assays, transwell migration/invasion assays, and co-immunoprecipitation to verify loss of G?¦? complex formation. Calcium flux measurements using fluorescent indicators can assess G?¦?-dependent intracellular calcium mobilization. Moreover, combining GNG10 knockout with EGFR inhibitors such as osimertinib enables the study of drug responsiveness and resistance pathways. For additional product details and technical support, please contact Ascent Research.
