The GSDMD Knockout UM-UC-3 Polyclonal Cells product is a CRISPR/Cas9-edited polyclonal knockout cell population targeting the GSDMD gene in the UM-UC-3 human bladder carcinoma epithelial cell line. This polyclonal pool provides a heterogeneous gene-disrupted model suitable for studying pyroptosis and inflammasome signaling without requiring clonal isolation. The mixed allelic edits reflect population-level knockdown, enabling robust experimental comparisons with wild-type controls.
UM-UC-3 is a widely utilized human transitional cell carcinoma cell line derived from a male patient, representing an established in vitro model of high-grade bladder cancer. These epithelial cells retain characteristics of aggressive bladder carcinoma and are commonly employed to investigate tumor progression, metastasis, and therapeutic resistance. Their derivation from the urinary bladder epithelium makes them relevant for studying urothelial carcinoma biology.
GSDMD is the critical pore-forming effector of pyroptosis, a lytic programmed cell death triggered by inflammasome activation. Upon sensing of pathogen- or damage-associated signals, sensor proteins such as NLRP3, NLRC4, AIM2, and pyrin assemble inflammasomes that activate caspase-1, while cytosolic lipopolysaccharide engages caspase-4 and caspase-5. These caspases cleave GSDMD, releasing its N-terminal domain that oligomerizes in the plasma membrane to form pores. This process leads to osmotic swelling, membrane rupture, and release of pro-inflammatory cytokines IL-1?? and IL-18, as well as alarmins like HMGB1. The protein NINJ1 further facilitates membrane disintegration. By disrupting GSDMD expression, this knockout model abolishes pore formation and downstream cytokine secretion, providing a defined system to dissect these signaling events.
In the context of bladder cancer, pyroptosis can influence the tumor immune microenvironment, therapy responses, and cell death plasticity. UM-UC-3 cells possess functional inflammasome machinery and are susceptible to stimuli such as nigericin and ATP. Ablation of GSDMD in this cell line allows researchers to specifically evaluate the role of pyroptotic death in bladder carcinoma pathogenesis, including its impact on immunogenic cell death, chemosensitivity, and tumor?Cimmune interactions.
Key applications of these GSDMD knockout UM-UC-3 polyclonal cells include mechanistic studies of inflammasome pathways, screening of caspase-1 or NLRP3 inhibitors, and interrogation of pyroptosis-dependent cytokine release using ELISA. The model facilitates cell death analysis by LDH release and propidium iodide uptake flow cytometry, and is suitable for co-culture experiments assessing dendritic cell activation. Additionally, it can be used in high-throughput drug screens to identify compounds that modulate non-canonical pyroptosis or overcome chemoresistance. For advanced customizations or project inquiries, please contact Ascent Research.
