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Updated: Aug 7, 2026
Granulocyte-dependent Autoantibody-induced Skin Blistering
Published on: October 12, 2012
How does acantholysis occur in pemphigus vulgaris: a critical review
Alessandro Lanza1, Nicola Cirillo, Felice Femiano
1Regional Center on Craniofacial Malformations, School of Medicine, II University of Naples, 80100 Naples, Italy. sandrolanza80@libero.it
Background:
Pemphigus vulgaris is a life-threatening autoimmune blistering disease targeting skin and mucous membranes, characterized by disruption of keratinocytes' adhesion termed acantholysis. Today multiple classes of targets are considered to play a role in the genesis of the acantholysis; of these, the classical pemphigus antigens, desmosomal cadherins (desmoglein 1 and 3) are the best characterized and considered as the most important. Additional antigens include the novel epithelial acetylcholine receptors (alpha9 and pemphaxin). Thus, acantholysis in pemphigus seems to result from a cooperative action of antibodies to different keratinocyte self-antigens, but the mechanisms by which epithelial cleft occurs are not yet clearly understood. In fact, the binding of the autoantibodies to these targets generates a plethora of biological effects due, on one hand, to their direct interference with adhesive function and, on the other, to more complex events involving intracellular pathways that modify proteases activity or calcium metabolism, leading to loss of cell-cell adhesion.
Insights
Pemphigus vulgaris involves antibodies attacking skin cell adhesion proteins, causing blistering. Understanding these autoimmune targets is key to developing pemphigus vulgaris treatments.
Area of Science:
- Dermatology
- Immunology
- Cell Biology
Background:
- Pemphigus vulgaris is a severe autoimmune blistering disease affecting skin and mucous membranes.
- It is characterized by acantholysis, a loss of keratinocyte adhesion.
- Key targets include desmoglein 1 and 3, and novel receptors like alpha9 and pemphaxin.
Purpose of the Study:
- To elucidate the complex mechanisms underlying acantholysis in pemphigus vulgaris.
- To investigate the cooperative action of antibodies against various keratinocyte self-antigens.
- To understand how autoantibody binding leads to epithelial cleft formation.
Main Methods:
- This study focuses on the biological effects of autoantibody binding to epithelial cells.
- It examines direct interference with cell adhesion and indirect effects via intracellular pathways.
- Analysis includes protease activity and calcium metabolism alterations.
Main Results:
- Autoantibody binding triggers diverse biological effects contributing to acantholysis.
- Direct interference with adhesive functions disrupts cell-cell adhesion.
- Intracellular pathway activation modifies proteases and calcium metabolism, leading to adhesion loss.
Conclusions:
- Acantholysis in pemphigus vulgaris results from a multifaceted autoimmune attack.
- Antibodies target multiple keratinocyte antigens, leading to impaired cell adhesion.
- Further research is needed to fully understand the complex mechanisms of epithelial cleft formation.
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