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Molecular characterization of inflammation and Staphylococcus aureus colonization of involved skin of atopic dermatitis patients. A non-invasive approach.

Abstract
Atopic dermatitis (AD) is a multifactorial chronic inflammatory disease mainly stemming from a genetic predisposition that leads to hypersensitivity to environmental factors and a common involvement of Staphylococcus aureus (SA) colonization. The aim of this work was to propose a new non-invasive approach to enumerate the genes coding for the toxins of SA in atopic skin samples. In parallel, the study aimed to evaluate the change in AD through 3 markers of the inflammatory response: IL-8, IL-1RA/IL-1alpha and IL-18. These methods were tested on 31 patients with AD, and finally on a group of 19 subjects for whom clinical improvement had been reported after various treatments. The study revealed the presence of a large number of genes encoding toxins in atopic samples, indicating a high rate of SA colonization, and also an increase in the level of all cytokine markers in atopic skin compared to the skin of healthy subjects. Finally, we found a positive correlation between increases in the SCORAD (Scoring Atopic Dermatitis Index) value after treatment and the corresponding evolution of the SA density. These methods provide a means to clinically evaluate the course of AD, and may help in the development of potential treatments.
AuthorsC Casas, H Ginisty, S Alvarez-Georges, C Viodé, O Lejeune, C Rouvrais, A M Schmitt, D Redoulès
JournalSkin pharmacology and physiology (Skin Pharmacol Physiol) Vol. 21 Issue 5 Pg. 260-8 ( 2008) ISSN: 1660-5535 [Electronic] Switzerland
PMID18612217 (Publication Type: Journal Article)
CopyrightCopyright 2008 S. Karger AG, Basel.
Chemical References
  • Bacterial Toxins
  • DNA, Bacterial
  • Interleukins
Topics
  • Bacterial Toxins (genetics, isolation & purification)
  • Case-Control Studies
  • Child
  • Child, Preschool
  • DNA, Bacterial (isolation & purification)
  • Dermatitis, Atopic (genetics, microbiology)
  • Genetic Predisposition to Disease
  • Genotype
  • Humans
  • Infant
  • Inflammation (genetics, microbiology)
  • Interleukins (metabolism)
  • Oligonucleotide Array Sequence Analysis (methods)
  • Polymerase Chain Reaction (methods)
  • Severity of Illness Index
  • Staphylococcal Skin Infections (genetics, microbiology)
  • Staphylococcus aureus (genetics, isolation & purification)
  • Treatment Outcome

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