This CRISPR/Cas9-edited polyclonal knockout cell population targets the GSDMD gene in the TE1 human esophageal squamous cell carcinoma cell line. The product provides a heterogeneous pool of cells with disrupted GSDMD expression, enabling functional studies of pyroptosis and inflammasome signaling without clonal selection. CRISPR/Cas9-mediated gene disruption in this polyclonal format preserves the genetic diversity of the host cell background while generating a loss-of-function model for GSDMD. Researchers can utilize this knockout system to investigate the role of GSDMD in cell death mechanisms and inflammatory responses in an esophageal cancer context.
The TE1 cell line was originally derived from a primary human esophageal squamous cell carcinoma. As a cancerous esophageal epithelial model, TE1 cells retain characteristics of malignant transformation and are widely used in esophageal cancer research. The cells exhibit robust growth in vitro and serve as a relevant platform for studying oncogenic signaling, tumor cell death pathways, and the interplay between inflammation and cancer progression. This p53-mutant cell line provides a context for examining how GSDMD-mediated pyroptosis influences tumor cell biology and therapeutic responses.
GSDMD functions as the executioner of pyroptosis, a lytic programmed cell death. Inflammatory caspases (caspase-1, caspase-4/5) cleave GSDMD, releasing an N-terminal fragment that oligomerizes and forms pores in the plasma membrane. This disrupts ionic gradients, causes cell swelling and lysis, and triggers release of IL-1??, IL-18, and HMGB1. Upstream, NLRP3, AIM2, and pyrin inflammasomes assemble with ASC to activate caspase-1, while non-canonical pathways involve LPS and caspase-4/5. GSDMD interacts with cardiolipin and phosphatidylinositol phosphates, which aid membrane targeting. The pathway integrates signals from Toll-like receptors and is modulated by ATG5, linking pyroptosis to neutrophil extracellular trap formation and innate immunity.
In the TE1 esophageal cancer model, GSDMD knockout enables dissection of pyroptosis-dependent tumor cell death and its consequences on the tumor microenvironment. Esophageal squamous cell carcinoma is associated with chronic inflammation, and pyroptosis can exert dual roles by eliminating malignant cells or promoting tumor-supportive inflammation. Disrupting GSDMD allows researchers to study resistance to pyroptotic stimuli and crosstalk between inflammasome activation and oncogenic pathways.
This GSDMD knockout TE1 polyclonal cell population supports mechanistic studies of pyroptosis, inflammasome signaling analysis, and cytokine release profiling. Key techniques include Western blotting for GSDMD cleavage, LDH release and propidium iodide uptake assays, IL-1??/IL-18 ELISA, immunofluorescence microscopy for pore formation, co?immunoprecipitation with caspase-1, and RT?qPCR. The model enables drug screening for pyroptosis modulators and investigation of inflammatory cell death in esophageal cancer. For further information, please contact Ascent Research.
