The GNRH1 Knockout CAL-27 Polyclonal Cells consist of a CRISPR/Cas9-edited polyclonal population in which GNRH1 gene function has been disrupted in the CAL-27 human oral squamous cell carcinoma cell line. This heterogeneous knockout model circumvents clonal artifacts, offering a robust system for investigating autocrine and paracrine gonadotropin-releasing hormone 1 signaling in a cancer-relevant context.
CAL-27 is an adherent epithelial cell line derived from a human tongue squamous cell carcinoma, widely used as a model for oral cancer biology. These cells express GNRH1 and its receptor GNRHR, establishing an autocrine loop that promotes proliferation, migration, and survival. The line is characterized for growth factor signaling, epithelial-to-mesenchymal transition, and drug response studies, making it an ideal host for assessing GNRH1 function in oral squamous cell carcinoma.
GNRH1 encodes the neuropeptide gonadotropin-releasing hormone 1, which stimulates pituitary gonadotropin release and exerts autocrine/paracrine effects in cancers. GnRH1 binds to its receptor GNRHR, a G??q/11-coupled receptor, activating phospholipase C?? to generate IP3 and DAG, leading to calcium mobilization and protein kinase C activation. This cascade converges on the MAPK/ERK pathway through RAF, MEK, and ERK1/2, and modulates cAMP signaling. GnRH1 signaling is regulated upstream by kisspeptin/KISS1R, neurokinin B, dynorphin, and hormonal feedback, while its downstream targets include GNRHR, gonadotropin subunit genes, cyclin D1, and MMPs, linking it to proliferation and invasion.
In CAL-27 cells, autocrine GnRH1 signaling supports oncogenic properties. Knockout of GNRH1 is expected to disrupt this loop, leading to dampened ERK1/2 phosphorylation, reduced calcium flux, and altered expression of proliferation and invasion regulators. This model facilitates dissection of GnRH1-dependent effects on oral cancer cell behavior and allows cross-pathway analysis in a disease-relevant background. Additionally, it provides a tool for comparative studies of GNRH1 function in other hormone-responsive cancers.
Researchers can use these polyclonal knockout cells for Western blotting of phospho-ERK1/2, RT-qPCR analysis of GNRH1 and downstream genes like cyclin D1 and MMPs, and functional assays including MTS proliferation and Transwell migration/invasion. Calcium flux measurements, GnRH ELISA, and GNRH1 promoter reporter assays are also applicable. These cells are suitable for testing GnRH antagonist efficacy and screening for modulators of the GnRH axis in oral cancer. For technical inquiries, contact Ascent Research.
