Patients with Atopic Dermatitis Colonized with Staphylococcus aureus Have a Distinct Phenotype and Endotype

Eric Simpson, Miguel Villarreal, Brett Jepson, Nick Rafaels, Gloria David, Jon Hanifin, Patricia Taylor, Mark Boguniewicz, Takeshi Yoshida, Anna De Benedetto, Kathleen C. Barnes, Donald Y.M. Leung, Lisa A. Beck

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28 Scopus citations

Abstract

Patients with atopic dermatitis (AD) are commonly colonized with Staphylococcus aureus (AD S. aureus+), but what differentiates this group from noncolonized AD patients (AD S. aureus) has not been well studied. To evaluate whether these two groups have unique phenotypic or endotypic features, we performed a multicenter, cross-sectional study enrolling AD S. aureus+ (n = 51) and AD S. aureus (n = 45) participants defined by the presence or absence of S. aureus by routine culture techniques and nonatopic, noncolonized control individuals (NA S. aureus) (n = 46). Filaggrin (FLG) genotypes were determined, and disease severity (Eczema Area and Severity Index, Rajka-Langeland Severity Score, Investigator's Global Assessment score, Numerical Rating Scale, and Dermatology Life Quality Index) was captured. Skin physiology was assessed (transepidermal water loss [TEWL], stratum corneum integrity, hydration, and pH), and serum biomarkers were also measured. We found that AD S. aureus+ patients had more severe disease based on all scoring systems except itch (Numerical Rating Scale), and they had higher levels of type 2 biomarkers (eosinophil count, tIgE, CCL17, and periostin). Additionally, AD S. aureus+ patients had significantly greater allergen sensitization (Phadiatop and tIgE), barrier dysfunction (TEWL and stratum corneum integrity), and serum lactate dehydrogenase (LDH) than both the AD S. aureus and NA S. aureus groups. FLG mutations did not associate with S. aureus+ colonization. In conclusion, adult patients with AD who are colonized on their skin with S. aureus have more severe disease, greater type 2 immune deviation, allergen sensitization, barrier disruption, and LDH level elevation than noncolonized patients with AD.

Original languageEnglish (US)
JournalJournal of Investigative Dermatology
DOIs
Publication statusAccepted/In press - Jan 1 2018

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ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Dermatology
  • Cell Biology

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