Intestinal microbiota composition and efficacy of iron supplementation in Peruvian children

Area of Science:

• Evolutionary Medicine
• Microbiome Research
• Pediatric Nutrition

Background:

• Childhood anemia remains a significant public health issue despite interventions.
• The intestinal microbiome's role in treatment efficacy, particularly for iron supplementation, is not fully understood.
• An evolutionary medicine perspective offers a novel approach to investigate this relationship.

Purpose of the Study:

• To explore differences in gut microbiota composition between anemic children who respond and do not respond to iron-sulfate treatment.
• To identify specific gut microbial taxa associated with treatment response.
• To assess if these associations persist after controlling for inflammatory and pathogenic variables.

Main Methods:

• Study included 49 anemic preschool-aged children in Lima, Peru.
• Gut microbiota diversity and differential abundance were analyzed using QIIME 2 and DESeq2.
• Multivariate regression models were employed to assess associations between microbial taxa and treatment response.

Main Results:

• No significant differences in gut microbiota diversity were found between responders and non-responders.
• Differential abundance patterns of specific taxa were observed between the two groups at baseline and post-treatment.
• A negative association was found between lower relative abundance of Barnesiellaceae and response to iron supplementation.

Conclusions:

• Gut microbiota composition, particularly the abundance of Barnesiellaceae, may be linked to iron treatment response in anemic children.
• Investigating nutritional status and pathogen exposure is crucial for understanding the gut microbiome's impact on anemia.
• Larger studies are needed to confirm these findings and elucidate the epidemiological context.