The GNRH1 Knockout NCI-H1299 Polyclonal Cells product provides a CRISPR/Cas9-edited polyclonal cell population in which the GNRH1 gene has been disrupted to abrogate expression of the gonadotropin-releasing hormone precursor protein. This knockout model is generated in the NCI-H1299 human non-small cell lung cancer background and is delivered as a heterogeneous pool of edited cells, enabling functional loss-of-function studies without clonal isolation. The polyclonal format preserves population-level diversity while uniformly eliminating target gene function, making it suitable for assays that require robust and reproducible ablation of GnRH signaling.
NCI-H1299 is a widely utilized lung adenocarcinoma epithelial cell line derived from a metastatic lymph node of a male patient. It is characterized by a homozygous deletion of the TP53 tumor suppressor gene, which eliminates p53-dependent checkpoint functions and facilitates unrestricted proliferation. The cell line serves as a workhorse model in cancer biology, especially in studies of metastasis, drug resistance, and signal transduction. Its mesenchymal phenotype and high migratory capacity render it particularly relevant for investigating the invasive behavior of lung carcinomas.
GNRH1 encodes preprogonadotropin-releasing hormone, which is proteolytically processed to generate the decapeptide GnRH. Secreted GnRH binds to its cognate receptor GNRHR, a Gq/11-coupled GPCR that stimulates phospholipase C (PLCB) to produce inositol trisphosphate and diacylglycerol, leading to calcium mobilization and activation of protein kinase C (PRKCA). Downstream, the MAPK/ERK cascade??comprising MAP2K1/2 and MAPK1/3??is activated and converges on transcription factors such as CREB to drive expression of the gonadotropin subunit genes CGA, LHB, and FSHB. Upstream regulators of GnRH secretion include kisspeptin (KISS1), neurokinin B (TAC3), and sex steroids, while interacting factors such as GNAQ and PLCB mediate acute signal transduction.
In the NCI-H1299 lung cancer context, autocrine or paracrine GnRH signaling has been implicated in modulating proliferation and migration, potentially through GNRHR-mediated activation of MAPK/ERK and calcium pathways. Disruption of GNRH1 in this TP53-null background creates a clean loss-of-function system to dissect the contribution of GnRH to cancer cell autonomous behaviors, independent of its classical neuroendocrine role. This model allows researchers to interrogate whether local GnRH production influences metastatic traits, and how crosstalk with other oncogenic pathways is coordinated.
This knockout cell pool is suited for a broad range of downstream applications, including Western blotting for GnRH, RT-qPCR quantification of GNRH1 mRNA, ELISA detection of secreted GnRH, calcium flux assays, and reporter gene assays driven by LH or FSH promoters. Cancer-relevant readouts such as migration/invasion assays and proliferation assays can be performed to assess phenotypic changes upon GNRH1 loss. The cells also serve as a screening platform for GnRH receptor modulators and for investigations into reproductive endocrinology and hormone-dependent cancers. For further information or to discuss custom uses, please contact Ascent Research.
