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Ceramides and skin function.

Luisa Coderch1, Olga López, Alfonso de la Maza

  • 1Instituto de Investigaciones Químicas y Ambientales de Barcelona, Barcelona, Spain. lcnesl@cid.csic.es

American Journal of Clinical Dermatology
|January 30, 2003
PubMed
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Ceramides are key skin lipids crucial for barrier function. Supplementing ceramides or their precursors may improve skin barrier disorders by restoring lamellar structures.

Area of Science:

  • Dermatology and Skin Barrier Science
  • Lipid Biochemistry
  • Epidermal Physiology

Background:

  • Ceramides are essential sphingolipids forming lamellar sheets in the stratum corneum, vital for epidermal barrier function.
  • The intercellular lipid domain comprises ceramides, free fatty acids, and cholesterol, with ceramide heterogeneity influencing skin properties.
  • Ceramides play a critical role in maintaining skin's water permeability barrier through ordered lipid structures.

Purpose of the Study:

  • To elucidate the role of ceramides in epidermal barrier function.
  • To investigate the impact of ceramide composition on skin barrier integrity.
  • To explore therapeutic strategies involving ceramide supplementation or precursor delivery for dermatoses.

Main Methods:

  • Analysis of epidermal lipid composition, focusing on ceramides and their structural variations.

Related Experiment Videos

  • Investigation of the physical state of lipid chains within stratum corneum lamellar bilayers.
  • Correlation of altered barrier lipid profiles with diminished skin barrier function in various disorders.

    • Main Results:

    • Most skin disorders with impaired barrier function show reduced total ceramide content and altered ceramide patterns.
    • Abnormal lamellar body contents and intercellular lamellae result from incomplete lipid mixtures.
    • Complete physiological lipid mixtures restore normal lamellar bodies and intercellular bilayers, indicating their importance.

    Conclusions:

    • Ceramide supplementation and the use of physiological lipid mixtures show potential for treating disturbed skin conditions.
    • Restoring the correct composition and structure of epidermal lipids is crucial for effective barrier repair.
    • Topical delivery of lipid precursors can enhance the epidermis's natural lipid-synthetic capability to improve barrier function.