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Studies on structural lipids in the stratum corneum

M Arima, I Matsuo, M Ohkido

    The Tokai Journal of Experimental and Clinical Medicine
    |April 1, 1981
    PubMed
    Summary
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    Structural lipids in the stratum corneum exist in both cellular and intercellular spaces. Analysis revealed distinct lipid ratios depending on extraction method, highlighting their complex organization in skin barrier function.

    Area of Science:

    • Dermatology
    • Biochemistry
    • Skin Biology

    Background:

    • The stratum corneum forms the skin's primary barrier.
    • Understanding the organization of structural lipids is crucial for barrier function.

    Purpose of the Study:

    • To investigate the existence and distribution of structural lipids within the stratum corneum.
    • To analyze lipid composition based on different extraction methods.

    Main Methods:

    • Stratum corneum lipids from guinea pig skin were induced using n-hexadecane treatment.
    • Total lipids were extracted using Folch's solution.
    • Lipids were also extracted using non-ionic surfactant treatment.

    Main Results:

    • Folch's solution extraction yielded a phospholipid to free cholesterol ratio of 1:8.

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  • Non-ionic surfactant extraction indicated lipids originate from cell surfaces and intercellular spaces.
  • This surfactant-extracted fraction showed a significantly higher free cholesterol to phospholipid ratio compared to total lipids.

    • Conclusions:

    • Structural lipids in the stratum corneum are organized within both cellular and intercellular compartments.
    • Different extraction techniques reveal distinct lipid populations and their localization.
    • Lipid composition varies depending on whether cellular or intercellular lipids are targeted.