The DSP Knockout HEK293T Polyclonal Cells product comprises a CRISPR/Cas9-edited polyclonal knockout cell population derived from HEK293T cells, featuring targeted disruption of the DSP gene. This polyclonal pool is generated via CRISPR/Cas9-mediated gene disruption, producing a versatile loss-of-function model for studying desmosomal biology without clonal isolation.
The host cell line, HEK293T, is a human embryonic kidney epithelial cell line stably expressing SV40 large T-antigen, enabling high-level episomal replication of transfected plasmids. Renowned for its superior transfectability and rapid growth, HEK293T is a standard platform for protein expression, viral production, and functional genomics studies, providing a robust epithelial context for dissecting gene function.
Desmoplakin (DSP) encodes a cytolinker protein that tethers keratin intermediate filaments (e.g., KRT5, KRT14) to desmosomal plaques by binding to armadillo proteins plakoglobin (JUP) and plakophilins (PKP1-3), which associate with desmosomal cadherins desmocollin (DSC) and desmoglein (DSG). This complex anchors the desmosome to the intermediate filament network, providing mechanical resilience to tissues. DSP transcription is driven by TP63 and modulated by Wnt/??-catenin signaling and mechanical stress. Functional loss of DSP leads to aberrant keratin filament organization, impaired desmosome assembly, and mislocalization of plakoglobin, which can disrupt both adhesion and Wnt-related transcriptional responses. Consistent with its critical role, DSP mutations manifest as arrhythmogenic right ventricular cardiomyopathy, palmoplantar keratoderma, Carvajal syndrome, and other severe desmosomal disorders.
In the HEK293T epithelial background, CRISPR/Cas9-mediated DSP disruption prevents the formation of mature desmosomes, leading to compromised cell-cell adhesion and altered intermediate filament network organization. Although HEK293T cells do not form extensive desmosomal contacts like keratinocytes, the knockout model offers a genetically tractable system to study DSP??s role in cytoskeletal anchoring and the interplay with plakoglobin-dependent signaling. The cell line??s high transfectability further enables efficient pathway reconstitution, domain-mapping experiments, and screening of pharmacological modulators, making it a valuable complement to primary cell studies.
This DSP knockout polyclonal cell population is well-suited for mechanistic studies of desmosome biogenesis, disease modeling for cardiac and skin desmosomal disorders (including arrhythmogenic right ventricular cardiomyopathy and palmoplantar keratoderma), and functional investigation of cell-cell adhesion in processes such as wound healing, tissue morphogenesis, and cancer cell invasion. The polyclonal nature allows examination of heterogeneous null phenotypes, mimicking population-level genetic heterogeneity. Representative experimental approaches include immunofluorescence microscopy to assess desmoplakin and desmosomal protein localization, western blotting for DSP and interacting partners, RT-qPCR for transcript confirmation, cell aggregation and scratch wound migration assays, transepithelial electrical resistance (TEER) for barrier function, co-immunoprecipitation to analyze protein complexes, and adhesion strength quantification. For further technical details or to place an order, please contact Ascent Research.
