The CASP6 Knockout HEK293T Polyclonal Cells are a CRISPR/Cas9-edited polyclonal cell population designed to disrupt the CASP6 gene in the human embryonic kidney epithelial cell line HEK293T. This loss-of-function model provides a robust system for investigating caspase-6 biology in apoptosis, inflammation, and disease. The polyclonal nature ensures a representative knockout pool suitable for functional studies without the need for clonal selection.
HEK293T cells, derived from HEK293 cells by transformation with sheared adenovirus type 5 DNA, stably express the SV40 large T antigen, enhancing transfection efficiency and episomal replication. Their epithelial origin, high transfectability, and rapid growth make them a preferred host for recombinant expression, viral production, and gene function studies. Using this well-characterized background ensures reproducibility and broad assay compatibility.
Caspase-6 is an executioner caspase that plays a central role in apoptotic execution by cleaving key structural proteins. It is activated by initiator caspases (caspase-8 and -9) downstream of death receptors (Fas ligand, TNF-??) or mitochondrial stress, as well as by granzyme B. Once active, caspase-6 cleaves lamin A/C to dismantle the nuclear lamina, and cytokeratin 18 to disrupt intermediate filaments, alongside substrates like SATB1, Tau, and NuMA. The enzyme is regulated by XIAP and interacts with p53, linking apoptosis to DNA damage responses. Caspase-6 also functions in inflammasome pathways and has been implicated in neurodegenerative processes, where it cleaves Tau and contributes to axonal degeneration. The apoptotic network involves Bcl-2 family proteins (Bax, Bak) and apoptosome components (cytochrome c, Apaf-1), positioning caspase-6 at a critical effector node.
In HEK293T cells, CASP6 knockout permits precise functional dissection of caspase-6-dependent events. The high transfection efficiency of the host line allows for facile introduction of reporters, rescue constructs, or apoptosis inducers. The polyclonal knockout population avoids clonal artifacts, offering a more heterogeneous and physiologically relevant response. Comparative analyses between wild-type and knockout cells can be readily performed using Western blotting, activity assays, or immunofluorescence to validate substrate cleavage and pathway engagement.
Applications include mechanistic studies of extrinsic and intrinsic apoptosis, utilizing flow cytometry (Annexin V/PI staining) and caspase activity assays with fluorogenic substrates. The cells support neurodegeneration research by enabling investigation of caspase-6-mediated Tau cleavage and screening of inhibitors. In inflammasome biology, they aid in dissecting caspase-6 roles in cytokine processing. Cancer cell death pathway analysis and drug target validation are enhanced by viability assays and rescue experiments. Standard techniques such as RT-qPCR and immunofluorescence for lamin A/C integrity are well suited. For further information, please contact Ascent Research.
