Non-invasive transcriptomic analysis using mRNAs in skin surface lipids obtained from children with mild-to-moderate...

Area of Science:

• Dermatology
• Molecular Biology
• Genomics

Background:

• Invasive biopsy methods for skin disease molecular pathology are challenging for pediatric patients.
• Skin surface lipid-RNAs (SSL-RNAs) offer a non-invasive method for comprehensive RNA analysis.
• Previous research established SSL-RNA analysis using next-generation sequencing for skin insights.

Purpose of the Study:

• To validate the SSL-RNA method for pediatric skin analysis.
• To investigate the molecular pathology of mild-to-moderate atopic dermatitis (AD) in children.

Main Methods:

• Collected sebum from 23 healthy children and 16 children with mild-to-moderate AD using oil-blotting film.
• Extracted SSL-RNAs from sebum samples.
• Performed AmpliSeq transcriptomic analysis on extracted SSL-RNAs.

Main Results:

• Children with AD showed lower expression of skin barrier genes (keratinization, lipid synthesis, antimicrobial peptides, intercellular adhesion).
• Elevated expression of CCL17 (a Th2-cytokine) and increased Th2-immune response observed in children with AD.
• KRT17 and CCL17 expression levels significantly correlated with the Eczema Area and Severity Index (EASI) score.

Conclusions:

• The SSL-RNA method effectively identifies molecular changes in pediatric AD related to immune responses and epidermal barrier.
• This non-invasive approach provides a valuable tool for understanding the molecular pathology of pediatric atopic dermatitis.
• SSL-RNA analysis offers a promising alternative to invasive methods for pediatric skin disease research.