Skin biomarkers predict development of atopic dermatitis in infancy

Area of Science:

• Dermatology
• Biochemistry
• Pediatrics

Background:

• Pediatric atopic dermatitis (AD) lacks predictive biomarkers for early onset.
• Understanding early skin barrier differences is crucial for predicting AD.

Purpose of the Study:

• To identify early biomarkers predicting the onset of pediatric atopic dermatitis (AD).
• To investigate skin barrier components in infants before AD manifestation.

Main Methods:

• Analysis of tape strips from infants at 2 months of age.
• Measurement of Natural moisturizing factor (NMF), corneocyte surface, cytokines, free sphingoid bases (SBs), and ceramides.
• Utilized liquid chromatography, atomic force microscopy, and mass spectrometry.

Main Results:

• Significantly lower phytosphingosine ([P]) levels observed in infants who developed AD (240 pmol/mg vs. 540 pmol/mg).
• Differences noted in sphingoid base chain lengths (C17, C18, C20) between groups.
• Phytosphingosine achieved 75.6% prediction accuracy; a lipid ratio combination reached 89.4%.

Conclusions:

• Altered lipid levels and sphingoid base chain lengths in infants are associated with later AD development.
• Elevated TARC/CCL17 levels were also observed in infants who developed AD.
• These findings offer potential biomarkers for predicting pediatric atopic dermatitis.