Eczema herpeticum in atopic dermatitis

Area of Science:

• Immunology
• Dermatology
• Genetics

Background:

• Atopic dermatitis (AD) is a chronic inflammatory skin disease.
• Eczema herpeticum (EH) is a severe HSV infection complicating AD.
• EH can lead to life-threatening conditions.

Purpose of the Study:

• Review clinical presentation, patient characteristics, diagnosis, and therapy of EH.
• Focus on pathophysiological factors predisposing to EH.
• Highlight genetic, immunological, and environmental influences.

Main Methods:

• Literature review of clinical and research findings on EH in AD.
• Analysis of genetic aberrations, immune system changes, and environmental factors.
• Examination of skin barrier function and microbiome alterations.

Main Results:

• EH involves Type 2 skewed T cells, impaired dendritic cell and NK cell function.
• Aberrant interferon pathway genes (IFNG, IFNGR1) increase EH risk.
• Overexpression of IL-4, IL-25, TSLP and reduced antimicrobial peptides observed.
• Skin barrier defects (e.g., filaggrin SNPs) and Staphylococcus aureus dysbiosis contribute.
• Dupilumab treatment reduces EH risk in AD patients.

Conclusions:

• EH pathogenesis is multifactorial, involving complex interactions.
• Genetic, immune, and environmental factors predispose AD patients to EH.
• Targeting risk factors and further research are crucial for EH management.