The DSG1 Knockout HAP1 Polyclonal Cells comprise a CRISPR/Cas9-edited polyclonal population of HAP1 cells engineered to disrupt the DSG1 gene, which encodes the desmosomal cadherin desmoglein 1. This polyclonal knockout cell pool provides a heterogeneous yet highly effective loss-of-function model for dissecting desmoglein 1 biology, without the need for single-cell clone isolation. The use of CRISPR/Cas9-mediated gene disruption ensures robust targeting of the DSG1 locus, enabling comprehensive studies of desmosomal adhesion and associated signaling pathways.
The HAP1 cell line, derived from the KBM-7 chronic myeloid leukemia line, is a near-haploid human cell model widely exploited for genetic knockout studies due to its simplified karyotype. The near-haploid state facilitates high-efficiency gene disruption and reduces confounding genetic redundancy, making it an ideal host for investigating DSG1 function in a leukemia background. Although HAP1 cells do not fully recapitulate keratinocyte-specific desmosome biology, they express key desmosomal components and retain calcium-dependent adhesion mechanisms, providing a versatile system for studying cell-cell interactions.
Desmoglein 1 (DSG1) is a member of the desmoglein subfamily of calcium-dependent cadherins, critical for desmosome-mediated cell adhesion in stratified epithelia. DSG1 interacts directly with plakoglobin (??-catenin) and desmoplakin to anchor keratin intermediate filaments, particularly keratin 1 and keratin 10, to the plasma membrane. Its adhesion function is regulated by calcium influx and protein kinase C alpha (PKC??), while its transcriptional expression is driven by the p63 transcription factor. Downstream, DSG1 loss triggers plakoglobin nuclear translocation and perturbations in Wnt/??-catenin signaling, highlighting its dual role in mechanical adhesion and signaling modulation.
In the HAP1 cellular context, DSG1 knockout disrupts desmosome-like adhesion complexes, offering a unique platform to explore desmoglein 1 interactions in a non-epidermal, near-haploid setting. The polyclonal population permits assessment of gross phenotypic changes without clonal selection artifacts, enabling robust comparison of wild-type and knockout conditions. This model is especially valuable for studying how DSG1 ablation alters the recruitment of desmoplakin and plakophilins, and how downstream signaling through plakoglobin and ??-catenin is rewired in leukemia cells.
The DSG1 Knockout HAP1 Polyclonal Cells are suited for a wide range of research applications, including the mechanistic dissection of desmosome assembly and disassembly, investigation of pemphigus foliaceus autoantibody pathogenicity, and analysis of skin barrier-related signaling. Researchers can employ immunofluorescence staining for desmosomal markers, calcium-switch adhesion assays, co-immunoprecipitation of desmosomal complexes, RT-qPCR for keratinocyte differentiation genes, and flow cytometry to measure adhesion molecule surface expression. For further technical information, please contact Ascent Research.
