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Pediatric Atopic Dermatitis Exhibits Distinctive Patterns in JAK/STAT Pathway Activation and CD6-ALCAM Signaling

Soyoung Jeong1, Sanghee Shin2, Hyun Seung Choi1

  • 1Department of Biomedical Sciences, Seoul National University Graduate School, Seoul 03080, Korea.

Immune Network
|September 8, 2025
PubMed

Insights

Pediatric atopic dermatitis (AD) has unique immune signatures, differing from adult AD. Findings suggest age-specific treatments are crucial for effective management of this skin condition.

Area of Science:

  • Immunology
  • Dermatology
  • Genetics

Background:

  • Pediatric atopic dermatitis (AD) presents unique clinical features compared to adult AD.
  • These differences suggest distinct inflammatory profiles influencing disease course and treatment efficacy.

Purpose of the Study:

  • To identify specific immune signatures in pediatric AD.
  • To compare the immune phenotypes between pediatric and adult AD patients.

Main Methods:

  • Single-cell RNA sequencing was used to analyze transcriptomic profiles of PBMCs.
  • Immune phenotypes were compared between pediatric AD, adult AD, and age/sex-matched healthy controls (HCs).

Main Results:

  • Th2 gene expression was elevated in both pediatric and adult AD.
  • Pediatric AD showed downregulated Th1, Th17, and Th22 gene expression, unlike adult AD.
  • The JAK/STAT signaling pathway was upregulated in adult AD but not pediatric AD.
  • The CD6-activated leukocyte cell adhesion molecule (ALCAM) pathway was upregulated in pediatric AD.

Conclusions:

  • Pediatric AD exhibits distinct immune signatures, including the absence of JAK/STAT pathway upregulation and unique CD6-ALCAM pathway activation.
  • These age-specific differences underscore the need for tailored treatment strategies in atopic dermatitis management.

Keywords:
ALCAMAtopic dermatitisBiologicsChildJAK kinasesSingle-cell RNA-seq

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