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- Tel: 858.663.9055
- Email: info@nsjbio.com
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DSG3 Antibody for IHC clone MSVA-543M recognizes Desmoglein 3, a calcium-dependent desmosomal cadherin encoded by the DSG3 gene on chromosome 18q12.1. Desmoglein 3, commonly referred to as DSG3 in the literature, is a single-pass transmembrane glycoprotein localized to desmosomes at the plasma membrane of stratified epithelial cells where it mediates strong intercellular adhesion. DSG3 antibody, also known as Desmoglein 3 antibody, is widely used in studies of epithelial differentiation, mucocutaneous integrity, and squamous cell carcinoma biology. This mouse monoclonal antibody supports detection of membranous DSG3 expression in formalin-fixed, paraffin-embedded tissue sections.
Desmoglein 3 is a member of the cadherin superfamily and functions as a core structural component of desmosomal junctions. Its extracellular cadherin repeats enable calcium-dependent homophilic adhesion between adjacent epithelial cells, while its intracellular domain associates with desmosomal plaque proteins including Plakoglobin and Desmoplakin. Through these interactions, Desmoglein 3 anchors keratin intermediate filaments to the plasma membrane, reinforcing epithelial cohesion in tissues subjected to mechanical stress such as skin and mucosal surfaces.
Expression of DSG3 is most prominent in the basal and immediate suprabasal layers of stratified squamous epithelia, including oral mucosa, esophagus, cervix, and epidermis. In contrast to Desmoglein 1, which is enriched in superficial epidermal layers, Desmoglein 3 is concentrated in deeper epithelial layers and plays a central role in maintaining mucocutaneous stability. Autoantibodies directed against Desmoglein 3 are strongly associated with pemphigus vulgaris, where disruption of desmosomal adhesion results in intraepidermal blister formation. Altered DSG3 expression has also been reported in squamous cell carcinoma and other epithelial malignancies, where desmosomal remodeling may influence tumor differentiation and invasion patterns.
Structurally, Desmoglein 3 contains multiple extracellular cadherin domains, a single transmembrane segment, and an intracellular tail that integrates into the desmosomal plaque complex. Beyond its adhesive function, DSG3 participates in signaling pathways regulating keratinocyte proliferation, differentiation, and epithelial homeostasis. Through its established role in desmosomal architecture and epithelial integrity, Desmoglein 3 remains an important marker in epithelial and oncologic research.
1. Optimal dilution of the DSG3 antibody for IHC should be determined by the researcher.
2. This DSG3/Desmoglein 3 antibody is recombinantly produced by expression in human HEK293 cells.
3. Manual Protocol: Freshly cut sections should be used (less than 10 days between cutting and staining). Heat-induced antigen retrieval for 5 minutes in an autoclave at 121oC in pH 7.8 Target Retrieval Solution buffer. Apply the antibody at a dilution of 1:150 at 37oC for 60 minutes. Visualization of bound antibody by the EnVision Kit (Dako, Agilent) according to the manufacturer's directions.
A recombinant fragment (around amino acids 379-491) human DSG3 protein (exact sequence is proprietary) was used as the immunogen for the DSG3 antibody for IHC.
DSG3/Desmoglein 3 antibody with sodium azide - store at 2 to 8oC; antibody without sodium azide - store at -20 to -80oC.
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