Gut microbiota and metabolomic changes across preterm stages: potential associations with bronchopulmonary dysplasia.

Non-BPD preterm infants showed a distinct trajectory of Bacteroidota abundance that progressively declined across postnatal stages as a hallmark of normal gut maturation.

• Bacteroidota abundance was characterized as showing a progressive decline in non-BPD infants over time
• This declining trajectory was described as a 'hallmark of normal gut maturation' in preterm infants
• The study used fecal samples collected from preterm infants at multiple timepoints to characterize temporal changes

Infants who later developed BPD exhibited early depletion followed by irregular enrichment of Bacteroidota, contrasting with the normal declining trajectory.

• BPD infants showed a two-phase pattern: early depletion of Bacteroidota followed by irregular enrichment
• This pattern was distinct from the progressive decline observed in non-BPD infants
• The altered Bacteroidota succession was identified as a potential early microbial perturbation in infants at risk of BPD
• The study was described as a 'pilot cohort' study, indicating a preliminary and hypothesis-generating design

Streptococcus abundance was positively associated with elevated cysteic acid, a metabolite linked to oxidative stress, in preterm infants.

• Correlation analysis revealed a positive association between Streptococcus abundance and cysteic acid levels
• Cysteic acid was identified as a metabolite linked to oxidative stress
• This Streptococcus-associated oxidative imbalance was proposed to reflect early metabolic perturbations relevant to BPD
• The findings were derived from integrated microbiome and metabolome (multiomics) analysis of fecal samples

The study performed an integrated multiomics analysis combining gut microbial and metabolic profiling from fecal samples of preterm infants to explore associations with BPD development.

• Fecal samples were collected from preterm infants and analyzed for both microbial composition and metabolomic profiles
• The study design was described as a 'pilot cohort' providing 'preliminary, hypothesis-generating insights'
• Temporal changes in gut microbial and metabolic profiles were characterized across preterm stages
• The authors noted that BPD remains a leading cause of morbidity in preterm infants with limited early biomarkers and targeted preventive strategies

Disrupted gut microbial-metabolic patterns were proposed as indicators of the gut as a potential extrapulmonary contributor to BPD disease susceptibility.

• The authors suggest findings 'highlight the gut as a potential extrapulmonary contributor to disease susceptibility'
• Altered Bacteroidota succession and Streptococcus-associated oxidative stress were identified as patterns associated with BPD risk
• The authors propose these findings could 'support early risk assessment and guide future microbiome-targeted interventions in preterm infants'
• The coordinated postnatal development of the gut microbiome and metabolome was described as essential for preterm infant health