Skin microbiota in atopic dermatitis: victim or executioner?

Area of Science:

• Dermatology
• Microbiology
• Immunology

Background:

• Atopic dermatitis (AD) is a common chronic inflammatory skin condition affecting 10-20% of people.
• It's characterized by dry, itchy skin and rashes, with multifactorial causes including skin barrier defects, immune issues, genetics, and environment.
• The skin microbiota is a key factor, with its balance disrupted in AD.

Purpose of the Study:

• To review the complex role of the skin microbiota in atopic dermatitis (AD).
• To emphasize how microbial dysbiosis drives AD progression and influences immune responses.
• To explore emerging microbiota-targeted therapies for improving AD outcomes.

Main Methods:

• Literature review focusing on the interplay between skin microbiota, immune system, and pathobionts in AD.
• Analysis of studies on microbial dysbiosis in AD.
• Examination of current and emerging therapeutic strategies targeting the skin microbiota.

Main Results:

• AD involves a decrease in beneficial bacteria and an increase in pathobionts like *Staphylococcus aureus*.
• Microbial imbalance exacerbates AD symptoms by damaging the skin barrier and triggering immune responses.
• *S. aureus* proliferation and virulence factors worsen AD and increase infection susceptibility.

Conclusions:

• Understanding the skin microbiota's role is crucial for effective AD management.
• Strategies restoring microbial balance and skin barrier function show promise for reducing infections and improving AD.
• Microbiota-targeted therapies offer a potential new avenue for treating atopic dermatitis.