The GSDME Knockout Ca Ski Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population derived from the Ca Ski human cervical adenocarcinoma cell line, engineered to disrupt the GSDME gene. This product provides a versatile loss-of-function model for studying GSDME-mediated pyroptotic cell death, utilizing a heterogeneous pool of edited cells that circumvents clonal selection artifacts. The polyclonal format retains the inherent biological variability of the parental line while enabling robust functional interrogation of GSDME in diverse experimental contexts.
Ca Ski cells are an adherent epithelial line established from a metastatic site of a cervical carcinoma, maintaining HPV16 positivity. These cells are widely employed as a tractable model for human papillomavirus-driven oncogenesis, expressing viral oncoproteins E6 and E7 that deregulate p53 and Rb tumor suppressor pathways. The epithelial morphology and transformed phenotype make Ca Ski cells particularly suitable for investigating cell death mechanisms and therapeutic responses within a relevant cancer background.
GSDME functions as a pyroptosis executioner, linking apoptotic signaling to inflammatory programmed cell death. Upon activation of the intrinsic apoptotic pathway, caspase-3 cleaves GSDME, releasing an N-terminal fragment that oligomerizes and perforates the plasma membrane, causing cell swelling, lysis, and release of pro-inflammatory cytokines such as IL-1?? and IL-18. This process converts a typically non-inflammatory apoptosis into lytic pyroptosis. GSDME activity is regulated upstream by caspase-3 and apoptosis-inducing stimuli, including chemotherapeutic agents like cisplatin and doxorubicin. It interacts with apoptotic machinery components, such as the apoptosome, and functionally cross-talks with GSDMD, the classical pyroptotic pore-forming protein activated by inflammatory caspases downstream of inflammasomes.
In the Ca Ski cervical carcinoma model, GSDME knockout allows dissection of cell death pathway crosstalk under oncogenic stress. Given the HPV-driven nature of this cell line, disrupting GSDME can reveal how viral transformation alters the balance between apoptosis and pyroptosis, impacting tumor cell fate and immune responses. This model is particularly valuable for exploring how chemotherapy-induced caspase-3 activation engages GSDME to trigger inflammatory death that may enhance anti-tumor immunity or contribute to tissue damage. Additionally, it supports studies on DFNA5-related hearing loss mechanisms, where GSDME gain-of-function mutations lead to cochlear hair cell death.
Researchers can employ this knockout model to investigate pyroptosis activation, drug-induced cell death mechanisms, and cancer therapy responses. Typical applications include Western blotting to confirm GSDME cleavage, LDH release assays for quantifying lytic cell death, flow cytometry with propidium iodide uptake for membrane integrity, caspase-3 activity measurements, immunofluorescence to visualize pore formation, and chemotherapy sensitivity profiling. This tool also facilitates the study of inflammasome signaling and cytokine release patterns. For further details or technical support, please contact Ascent Research.
