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Human epidermal lipids: characterization and modulations during differentiation.

M A Lampe, M L Williams, P M Elias

    Journal of Lipid Research
    |February 1, 1983
    PubMed
    Summary
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    Human epidermal differentiation involves significant lipid changes, with decreasing phospholipids and increasing sterols and sphingolipids. These findings offer insights into stratum corneum function and lipid metabolism.

    Area of Science:

    • Biochemistry
    • Dermatology
    • Lipidomics

    Background:

    • The lipid composition of human epidermis changes dynamically during cell differentiation.
    • Understanding these changes is crucial for comprehending the stratum corneum's barrier function.

    Purpose of the Study:

    • To quantitatively analyze lipid profiles across different layers of human epidermis.
    • To elucidate the roles of specific lipids in epidermal differentiation and stratum corneum formation.

    Main Methods:

    • Thin-layer chromatography (TLC) was employed for lipid separation.
    • Glass capillary gas-liquid chromatography (GLC) was used for quantitative lipid analysis.

    Main Results:

    • Phospholipids decreased, while sterols and sphingolipids increased during epidermal differentiation.

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  • Sphingolipids became major lipids in the stratum corneum, accumulating long-chain fatty acids.
  • Cholesterol sulfate was found in significant amounts, particularly in the stratum granulosum.

    • Conclusions:

    • Quantitative data on human epidermal lipids were established.
    • Specific lipid classes were implicated in stratum corneum functions.
    • Potential product-precursor relationships for epidermal lipids were suggested.