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Newborn infant skin gene expression: Remarkable differences versus adults
Marty O Visscher1,2, Ping Hu3, Andrew N Carr3
1Skin Sciences, Program, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States of America.
Plos One
|October 19, 2021
Summary
Newborn skin exhibits unique biological processes, including enhanced extracellular matrix organization and fatty acid metabolism, crucial for survival in harsh environments. Adult skin shows more developed epidermal and immune functions, highlighting distinct maturation pathways.
Area of Science:
- Dermatology and Molecular Biology
- Neonatal Skin Development
- Comparative Genomics
Background:
- Understanding newborn skin is vital for infant health, injury response, and disease management.
- Infant skin must adapt to a new environment with microbes, oxygen, and irritants.
- Mature adult skin serves as a benchmark for stable, developed skin.
Purpose of the Study:
- To compare the molecular and biological differences between newborn and adult human skin.
- To identify key pathways and genes characterizing infant skin's unique properties.
- To provide foundational knowledge for protecting and preserving infant skin.
Main Methods:
- Observational study comparing newborn (n=27) and adult (n=43) skin samples.
- Transcriptomics profiling to analyze gene expression.
- Gene set enrichment analysis and statistical comparison of differentially regulated genes.
Main Results:
- Over 25,000 differentially regulated probe sets (10,647 genes) identified between infant and adult skin.
- Infant skin showed significant enrichment in extracellular matrix (ECM) organization, cell adhesion, and fatty acid metabolism.
- Adult skin exhibited overexpression in epidermal development, immune function, and hair cycle-related genes.
Conclusions:
- Infant skin possesses distinct biological processes, particularly in ECM organization, supporting its resilience.
- Adult skin demonstrates advanced epidermal differentiation and immune maturation.
- This research offers critical insights into infant skin biology for future protective strategies.
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