The DSG2 Knockout HAP1 Polyclonal Cells product provides a CRISPR/Cas9-edited polyclonal knockout cell population in which the DSG2 gene has been disrupted. This loss-of-function model is generated through introduction of Cas9 and a guide RNA targeting DSG2, resulting in a heterogeneous pool of cells harboring gene-level disruption without selection of a single clone. As a polyclonal population, it captures the diversity of editing outcomes and is particularly suitable for experiments where population-level assessments of gene function are desired, such as adhesion assays and signaling studies.
The parental host cell line, HAP1, is a near-haploid human cell line derived from the KBM-7 chronic myeloid leukemia cell line. Its haploid karyotype simplifies genetic analysis and makes HAP1 a widely adopted platform for CRISPR-based functional genomics. The near-haploid state reduces gene copy number complexity, facilitating interpretation of knockout phenotypes. HAP1 cells grow in adherent culture and retain a relatively stable genome, making them a robust model system for dissecting gene function in cellular adhesion pathways, desmosome biology, and signal transduction research.
DSG2 encodes desmoglein-2, a calcium-dependent cadherin that functions as a core component of desmosomes. Desmoglein-2 mediates cell-cell adhesion by linking adjacent cells and connecting to the intermediate filament cytoskeleton through intracellular partners. Mechanistically, DSG2 interacts with plakoglobin (JUP) and plakophilin-2 (PKP2), which in turn recruit desmoplakin (DSP) to anchor intermediate filaments. This protein complex is essential for maintaining tissue integrity, particularly in mechanically stressed tissues. DSG2 is transcriptionally regulated by TP63 and is influenced by PKC signaling pathways. Its disruption impairs desmosome assembly, alters cell adhesion, and can lead to downstream effects on signaling cascades such as Wnt signaling and other adhesion-dependent pathways, potentially affecting cell migration and intercellular communication.
In the HAP1 near-haploid background, knockout of DSG2 creates a powerful tool for investigating desmosomal adhesion in a simplified genetic context. The absence of a second functional allele in these cells facilitates unambiguous assignment of phenotypic changes to DSG2 loss. This model is especially relevant for studying diseases linked to DSG2 dysfunction, including arrhythmogenic right ventricular cardiomyopathy (ARVC), Naxos disease, and pemphigus. Moreover, because HAP1 cells exhibit robust adhesion characteristics, DSG2 knockout can reveal specific contributions of desmoglein-2 to cell?Ccell junction stability and can be exploited to examine how loss of desmosomal integrity influences cancer metastasis-associated phenotypes.
Researchers can employ these polyclonal knockout cells in a broad array of assays. Western blotting and immunofluorescence enable verification of DSG2 protein loss and visualization of desmosome architecture. Flow cytometry can quantify surface expression changes. Cell adhesion and transwell migration assays directly measure functional consequences of DSG2 disruption on cell?Ccell and cell?Csubstrate interactions. Co-immunoprecipitation studies allow mapping of altered protein?Cprotein interactions among desmosomal components such as plakoglobin, desmoplakin, and plakophilin-2. Additionally, the model is suitable for drug screening efforts targeting adhesion defects or for studying signaling crosstalk in desmosome-disrupted backgrounds. For further details or technical support, please contact Ascent Research.
