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Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing
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Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing

Published on: October 15, 2019

Diversity of the gut microbiota and eczema in early life

Erick Forno1, Andrew B Onderdonk, John McCracken

  • 1Channing Laboratory Boston, MA, USA. juan.celedon@channing.harvard.edu.

Clinical and Molecular Allergy : CMA
|September 24, 2008
PubMed

Insights

Infant gut bacterial diversity is linked to eczema development. Lower microbial diversity in the first months of life was associated with a higher risk of developing eczema by six months.

Area of Science:

  • Microbiome research
  • Pediatric dermatology
  • Infant health

Background:

  • Previous studies on infant gut microbiota and eczema have shown inconsistent findings.
  • Investigating the relationship between early-life gut microbial composition and eczema is crucial for understanding disease etiology.

Purpose of the Study:

  • To investigate the association between gut bacterial diversity and eczema development in infants.
  • To utilize methods beyond traditional stool culture for assessing microbial diversity.

Main Methods:

  • Fecal samples were collected from 21 infants at 1 and 4 months of age.
  • Infants were categorized into cases (eczema by 6 months) and controls.
  • Denaturing gradient gel electrophoresis (DGGE) was used to analyze microbial diversity, with the number of bands and Shannon index (H') as key metrics.

Main Results:

  • Infants who did not develop eczema exhibited significantly higher fecal microbial diversity at both 1 and 4 months compared to those who developed eczema.
  • Specifically, controls showed higher Shannon index values (H') at 1 month (0.75 vs. 0.53) and 4 months (0.92 vs. 0.59).
  • A significant increase in microbial diversity from 1 to 4 months was observed in controls, but not in infants who later developed eczema.

Conclusions:

  • Reduced gut microbial diversity in early infancy is associated with an increased risk of developing eczema.
  • These findings highlight the potential role of the gut microbiome in the pathogenesis of childhood eczema.
Abstract

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