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Mutations in PERP Cause Dominant and Recessive Keratoderma
Sabine Duchatelet1, Lynn M Boyden2, Akemi Ishida-Yamamoto3
1Laboratory of Genetic Skin Diseases, INSERM Imagine Institute, Paris, France; University Paris Descartes, Paris, France.
The Journal of Investigative Dermatology
|October 16, 2018
Summary
Mutations in PERP, a desmosome component, cause human keratoderma. Different PERP mutations lead to Olmsted syndrome or erythrokeratoderma, impacting epidermal homeostasis and cell adhesion.
Area of Science:
- Dermatology
- Genetics
- Cell Biology
Background:
- Mendelian skin disorders offer insights into epidermal biology.
- Desmosomes are critical for epidermal structure and function.
Purpose of the Study:
- To investigate the role of PERP in human skin disorders.
- To identify genetic causes of inherited keratoderma.
Main Methods:
- Genetic analysis of patients with keratoderma.
- Protein analysis of PERP mutations.
- Electron microscopy of skin biopsies.
- Assessment of intercellular adhesion.
Main Results:
- Mutations in PERP cause both dominant (Olmsted syndrome) and recessive (erythrokeratoderma) keratoderma.
- PERP mutations lead to epidermal hyperproliferation and impaired desmosome formation.
- Electron microscopy reveals immature desmosomes lacking a dense midline.
Conclusions:
- PERP is essential for human desmosome integrity and epidermal homeostasis.
- PERP mutations expand the spectrum of inherited keratinization disorders.
- Understanding PERP function provides new insights into skin barrier diseases.
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