American Journal of Clinical Dermatology

, Volume 5, Issue 4, pp 217–223 | Cite as

Stratum Corneum pH in Atopic Dermatitis

Impact on Skin Barrier Function and Colonization with Staphylococcus Aureus
  • Frank Rippke
  • Volker Schreiner
  • Thomas Doering
  • Howard I. Maibach
Leading Article

Abstract

Recent studies have provided new insights into the occurrence, causes, and pathogenetic consequences of changes in the skin pH in atopic dermatitis, particularly with respect to skin barrier function and colonization with Staphylococcus aureus. Growing evidence suggests an impaired release of proton donors, such as amino acids, urocanic acid, and lactic acid, to the stratum corneum in atopic dermatitis, as a result of reductions in filaggrin proteolysis and sweat secretion. In addition, an impaired formation of free fatty acids from sebaceous lipids and epidermal phospholipids seems to be involved. Because both lipid organization and lipid metabolism in the stratum corneum requires an acidic pH, these alterations might contribute to the disturbance of skin barrier function observed in atopic dermatitis. Furthermore, bacterial growth and virulence of S. aureus, as well as defensive host mechanisms, have increasingly been delineated as pH dependent, giving rise to a new understanding of the pathophysiology underlying increased skin colonization seen in atopic dermatitis.

Notes

Acknowledgment

The authors have provided no information on sources of funding or on conflicts of interest directly relevant to the content of this review.

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Copyright information

© Adis Data Information BV 2004

Authors and Affiliations

  • Frank Rippke
    • 1
  • Volker Schreiner
    • 1
  • Thomas Doering
    • 1
  • Howard I. Maibach
    • 2
  1. 1.Beiersdorf AGHamburgGermany
  2. 2.Department of DermatologyUniversity of California San Francisco Medical CenterSan FranciscoUSA

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