The DSC1 Knockout HAP1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal cell population derived from the HAP1 cell line, designed to disrupt the DSC1 gene encoding desmocollin 1. This calcium-dependent cadherin is essential for desmosome-mediated cell-cell adhesion. The polyclonal knockout model provides a heterogeneous allele pool, reducing clonal bias and offering a robust loss-of-function system for desmosome research.
HAP1 cells are a near-haploid human male cell line originating from the chronic myeloid leukemia (CML) cell line KBM-7. They exhibit disomy for chromosome 8 and are widely used in genetic studies due to their haploidy, which facilitates efficient gene knockout and functional analysis. HAP1 cells are adherent and have been extensively characterized for pathways involving cell adhesion, signaling, and cancer biology, making them a versatile host for modeling desmosomal gene disruption.
DSC1 encodes desmocollin 1, a transmembrane cadherin that forms calcium-dependent adhesive interactions with other desmocollins and desmogleins (e.g., DSG1). Inside the cell, desmocollin 1 binds to plakoglobin (JUP) and plakophilins (PKP1), which recruit desmoplakin (DSP) and link to keratin intermediate filaments (KRT1, KRT10). DSC1 expression is transcriptionally regulated by TP63, a key epithelial transcription factor, and is stimulated by calcium levels and WNT signaling. Knockout of DSC1 disrupts these complexes, impairing desmosome assembly and cell-cell adhesion.
In the HAP1 context, loss of DSC1 provides a clean system to study desmosome disruption without the complexity of stratified epithelial tissues. While HAP1 are not keratinocytes, they express the core desmosomal machinery, enabling direct biochemical and microscopy-based assays. The resulting adhesion defects model aspects of skin fragility disorders, striate palmoplantar keratoderma, and altered cohesion in metastatic cancer cells. The near-haploid background ensures that functional outcomes are attributable to the engineered disruption.
Researchers can employ DSC1 Knockout HAP1 Polyclonal Cells in diverse experimental paradigms, including immunofluorescence to visualize desmosome assembly, Western blotting for desmosomal protein expression, and cell adhesion or wound healing assays to quantify functional adhesion. Calcium switch experiments can probe calcium-dependent reassembly of desmosomal structures, while RT-qPCR enables monitoring of downstream differentiation markers such as DSP and KRT1. These cells are also amenable to high-content screening approaches. For additional technical details, please contact Ascent Research.
