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Stratum corneum lipid abnormalities in atopic dermatitis.
A Yamamoto1, S Serizawa, M Ito
1Department of Dermatology, Niigata University School of Medicine, Japan.
Archives of Dermatological Research
|January 1, 1991
Summary
Patients with atopic dermatitis (AD) have dry skin due to reduced ceramide 1, a key lipid for skin barrier function. This suggests structural changes in ceramide 1 may cause impaired water barrier in AD.
Area of Science:
- Dermatology
- Biochemistry
- Skin Physiology
Background:
- Atopic dermatitis (AD) is frequently associated with dry skin.
- The stratum corneum's lipid composition is crucial for skin barrier function.
- Abnormalities in skin lipids may contribute to the pathophysiology of AD.
Purpose of the Study:
- To investigate the relationship between dry skin in atopic dermatitis and stratum corneum lipid abnormalities.
- To compare the lipid profiles of AD patients with those of healthy controls.
Main Methods:
- Stratum corneum lipids were collected from AD patients and age/sex-matched controls.
- Lipid classes and ceramide fractions were quantified using high-performance thin-layer chromatography and photodensitometry.
- Fatty acid composition of specific lipids was analyzed by capillary gas chromatography.
Main Results:
- No significant differences were found in the overall proportions of major stratum corneum lipid classes between AD patients and controls.
- AD patients showed a significant decrease in the proportion of ceramide 1.
- Increased levels of esterified C18:1 fatty acids (oleate) were observed in ceramide 1 of AD patients.
Conclusions:
- Reduced amounts and/or structural alterations of ceramide 1 may impair the skin's water barrier function in atopic dermatitis.
- Ceramide 1 plays a vital role in maintaining skin hydration and barrier integrity.
- These findings highlight a specific lipid abnormality potentially underlying dry skin in AD.