DST Knockout HAP1 Polyclonal Cells are a polyclonal population of the HAP1 cell line in which the DST gene has been disrupted using CRISPR/Cas9-mediated gene editing. This targeted disruption results in loss-of-function of dystonin, a large cytolinker protein essential for maintaining cellular architecture and adhesion. As a polyclonal knockout model, this cell population provides a robust tool for studying the functional consequences of DST ablation without the clonal variability inherent in single-cell derived lines, making it suitable for high-throughput screening and population-level analyses.
The HAP1 host cell line is a near-haploid human cell line derived from the KBM-7 chronic myeloid leukemia line. HAP1 cells exhibit an adherent, fibroblast-like morphology and possess a largely haploid karyotype, which simplifies genetic manipulation and phenotypic analysis by reducing gene redundancy. This makes HAP1 a widely used system for functional genomics, CRISPR-based screens, and loss-of-function studies across diverse research fields, including cancer biology, cell signaling, and cytoskeletal dynamics.
Dystonin functions as a critical cytolinker that integrates the intermediate filament network with actin filaments and microtubules, thereby ensuring mechanical integrity and signal transduction at cell-matrix adhesion sites. It is a core component of hemidesmosomes, where it interacts with integrin ??6??4 (ITGA6/ITGB4), plectin (PLEC), and keratin 5/14 (KRT5/KRT14) to anchor intermediate filaments to the basal cell surface. Upstream, dystonin expression is regulated by the p63 transcription factor in response to extracellular matrix adhesion cues. Downstream, dystonin loss disrupts keratin filament architecture, alters actin dynamics, leads to mislocalization of HDAC6, and modulates ERK signaling, collectively compromising cell adhesion and mechanotransduction.
In the HAP1 background, disruption of DST provides a physiologically relevant model to investigate the molecular mechanisms underlying skin blistering disorders and neuropathies. The near-haploid nature of HAP1 cells ensures that the knockout phenotype is not masked by a second functional allele, leading to clear loss-of-function manifestations. This model recapitulates key aspects of epidermolysis bullosa simplex and hereditary sensory and autonomic neuropathy type VI, making it a valuable platform for exploring cytoskeletal cross-talk, focal adhesion dynamics, and integrin-mediated signaling in a simplified genetic context.
Researchers can employ DST Knockout HAP1 Polyclonal Cells in a wide array of functional assays to dissect cell adhesion, migration, and cytoskeletal organization. Representative techniques include Western blotting to assess dystonin isoform expression, immunofluorescence microscopy to visualize keratin and actin network disruption, quantitative adhesion assays on extracellular matrix substrates, scratch wound healing and transwell migration assays, flow cytometric analysis of integrin surface expression, and transcriptome-wide RNA-seq to capture downstream gene expression changes. This model is also suited for small-molecule screening aimed at restoring hemidesmosome integrity or modulating cytoskeletal dynamics in disease contexts. For further technical details and ordering information, please contact Ascent Research.
