The DSG1 Knockout HeLa Polyclonal Cells comprise a CRISPR/Cas9-edited polyclonal knockout cell population in which the desmosomal cadherin DSG1 gene has been disrupted within the HeLa cellular background. This polyclonal product preserves a heterogeneous pool of edited alleles, enabling studies that average over clonal variation and reveal dominant biological consequences of target-gene loss without the need for single-cell isolation. As a loss-of-function model, it provides a robust system for investigating DSG1-dependent adhesion and signaling in an epithelial context.
HeLa cells are an immortalized human cervical epithelial adenocarcinoma line harboring HPV18 sequences. The viral oncoproteins E6 and E7 inactivate the tumor suppressors p53 and Rb, respectively, creating a permissive environment for cell cycle progression and genomic instability. Widely used as a model for epithelial biology and cancer, HeLa cells retain many features of epithelial differentiation and junctional assembly, making them well-suited for exploring desmosome function and its crosstalk with oncogenic pathways. Their rapid growth and experimental tractability further facilitate high-throughput and mechanistic studies.
DSG1 encodes a calcium-dependent cadherin that anchors intermediate filaments to the plasma membrane via interactions with plakoglobin (JUP), desmoplakin (DSP), and plakophilins (PKP1/2) at desmosomal junctions. It is activated by calcium influx and upstream regulators including p63, EGFR ligands, retinoic acid, and PKC signaling. DSG1 loss disrupts desmosome integrity, releasing plakoglobin into the cytoplasm where it modulates EGFR-ERK1/2 signaling and promotes ??-catenin nuclear translocation. This shift enhances expression of downstream targets such as cyclin D1 and matrix metalloproteinases, driving transcriptional programs associated with reduced adhesion and increased invasion. Thus, DSG1 serves as a critical node connecting cell?Ccell adhesion to growth factor and Wnt/??-catenin pathways.
In the HeLa context, DSG1 knockout exacerbates the baseline defects in epithelial cohesion conferred by HPV oncoprotein activity. The resulting phenotype combines weakened intercellular adhesion with heightened EGFR-ERK signaling and ??-catenin-driven transcription, recapitulating aspects of epithelial?Cmesenchymal transition (EMT) and barrier dysfunction. This model is therefore highly relevant for dissecting mechanisms underlying desmosomal diseases such as palmoplantar keratoderma, SAM syndrome, and skin fragility, as well as for probing how adhesion loss contributes to epithelial cancer progression. The polyclonal nature ensures that dominant functional outcomes are captured across a spectrum of editing events.
Typical applications include immunofluorescence staining for desmosomal components (DSP, JUP, PKP) to assess junction integrity, western blotting for DSG1 and phospho-ERK to confirm knockout and signaling activation, transepithelial electrical resistance (TEER) measurements to quantify barrier function, scratch wound assays to evaluate migration, and RNA-seq profiling to uncover global transcriptomic changes. The cells are also suited for compound screening aimed at rescuing desmosomal adhesion or inhibiting aberrant EGFR-ERK activity, and for cancer invasion studies. For additional details or technical support, please contact Ascent Research.
