The GSDMD Knockout CAL-27 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population originating from the CAL-27 human tongue squamous cell carcinoma cell line. Through targeted gene disruption of GSDMD, this product establishes a loss-of-function model for investigating pyroptotic cell death and associated inflammatory signaling pathways in a head and neck cancer context.
CAL-27 is an extensively characterized epithelial cancer line derived from a primary tongue tumor of a 56-year-old male patient. It exhibits hallmark traits of head and neck squamous cell carcinoma (HNSCC), including uncontrolled proliferation, migratory behavior, and invasive capacity, making it a robust in vitro system for oncogenic studies. The introduction of a GSDMD knockout in this background enables precise interrogation of pyroptosis in oral cancer.
GSDMD functions as the executioner of pyroptosis upon cleavage by inflammatory caspases-1, -4, and -5, which are activated downstream of inflammasomes such as NLRP3, AIM2, and NLRC4. Cleaved N-terminal GSDMD fragments oligomerize and insert into the plasma membrane, forming pores that cause cell swelling, lysis, and release of pro-inflammatory mediators including IL-1??, IL-18, and LDH. Upstream regulators encompass Toll-like receptors, TNF, and IFN??, while direct interactors include caspase-1, -4, and -5. This signaling network positions GSDMD as a central node connecting inflammasome assembly to inflammatory cell death.
In the CAL-27 HNSCC milieu, GSDMD knockout eliminates canonical pyroptosis, allowing dissection of its contributions to tumor cell fate, cytokine secretion, and tumor microenvironment dynamics. This polyclonal knockout model is particularly valuable for exploring whether GSDMD-mediated cell death influences cancer progression parameters such as proliferation, migration, and invasion, and for studying potential compensatory cell death pathways when pyroptosis is abrogated.
This product is suited for a broad array of experimental applications, including mechanistic dissection of inflammasome signaling, high-throughput screening for pyroptosis modulators, and functional assessment of GSDMD in migration and invasion assays. Compatible techniques include western blotting for GSDMD cleavage, LDH release measurement, flow cytometry (Annexin V/PI), ELISA for IL-1?? and IL-18, caspase activity assays, RT-qPCR, and microscopy-based pore formation imaging. The polyclonal knockout pool is an indispensable resource for translational research targeting pyroptosis in head and neck cancer and inflammatory diseases. For additional technical information, please contact Ascent Research.
