The DMD Knockout HEK293T Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population targeting the DMD gene, which encodes dystrophin. This model provides a loss-of-function system for studying dystrophin biology in a human cell context. The polyclonal population represents a heterogeneous mixture of edited cells derived from a bulk selection process, offering a convenient tool for initial functional screening without clonal isolation. By disrupting the DMD locus, these cells eliminate dystrophin expression, enabling investigation of its cellular roles, protein interactions, and downstream signaling events in a non-muscle background.
The host cell line, HEK293T, is a widely used human embryonic kidney epithelial cell line that stably expresses the SV40 large T antigen, facilitating high-level episomal replication of transfected plasmids containing the SV40 origin of replication. This feature, combined with robust growth and high transfection efficiency, makes HEK293T cells a preferred platform for viral packaging, large-scale protein production, and diverse cell-based assays. While not a classical muscle cell model, the HEK293T background offers a biochemically tractable system for expressing and analyzing components of the dystrophin-associated glycoprotein complex (DGC) and for dissecting protein?Cprotein interaction networks independent of muscle-specific differentiation programs.
Dystrophin, encoded by DMD, is a large cytoskeletal linker connecting the actin cytoskeleton to the extracellular matrix via the dystrophin-glycoprotein complex (DGC). It directly binds F-actin and ??-dystroglycan, while associating with ??-dystrobrevin and syntrophins to scaffold signaling molecules like nNOS. The DGC comprises ??-dystroglycan, sarcoglycans (??, ??, ??, ??), sarcospan, and other proteins. Dystrophin loss destabilizes the DGC, causing sarcolemmal fragility, nNOS mislocalization, and calcium dysregulation. Transcriptional regulation of DMD is driven by MyoD and MEF2 during muscle differentiation.
In HEK293T cells, DMD knockout provides a simplified system to study dystrophin??s biochemical functions and DGC assembly without muscle-specific contraction. This model facilitates direct protein interaction and post-translational modification analyses. Reconstitution of DGC components in these cells allows assessment of binding affinities, localization, and pathogenic mutation effects. It also enables high-throughput drug screening for molecules that restore dystrophin function or modulate calcium and membrane repair pathways.
Typical research applications include co-immunoprecipitation assays to map dystrophin interaction networks, immunofluorescence microscopy to examine DGC component localization, and calcium imaging to evaluate calcium influx following membrane stress. Cell adhesion assays can quantify disrupted cell?Cmatrix interactions, while RT-qPCR and western blotting confirm knockout efficiency and assess downstream target expression. The polyclonal population format is also suited for pooled CRISPR screens and rapid candidate validation. For further details on product specifications and ordering, please contact Ascent Research.
