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Infant Gut Microbiota Associated with Fine Motor Skills
Inmaculada Acuña1,2, Tomás Cerdó3, Alicia Ruiz4
1Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Campus of Cartuja, University of Granada, 18071 Granada, Spain.
Insights
Infant gut bacteria composition is linked to fine motor skills development. Specific bacterial groups, including probiotics like Bifidobacterium, were more abundant in infants with better fine motor abilities.
Area of Science:
- Microbiome research
- Neurodevelopmental biology
- Pediatric health
Background:
- Early life gut microbiome development is dynamic and coincides with brain maturation.
- Potential cross-talk mechanisms between the gut and brain may influence infant behavior.
Purpose of the Study:
- To investigate the association between gut microbiota composition and neurodevelopmental outcomes in healthy infants.
- To explore differences in gut microbial diversity, enterotypes, and specific taxa related to behavioral characteristics.
Main Methods:
- 16S rRNA gene sequencing was employed to analyze the gut microbiota of 71 healthy infants at 18 months of age.
- Neurodevelopmental outcomes were assessed using the Bayley Scales of Infant Development III.
- Dirichlet multinomial mixture analysis was used to determine enterotypes.
Main Results:
- Significant differences in beta-diversity (weighted Unifrac) were observed in fine motor (FM) activity between infants.
- Two distinct enterotypes were identified and strongly associated with FM outcomes.
- Specific bacterial genera, including *Turicibacter* and *Parabacteroides*, were linked to lower FM performance, while others, including *Bifidobacterium* and *Lactobacillus*, were associated with higher FM performance, even after controlling for maternal BMI and breastfeeding duration.
Conclusions:
- The study suggests a link between gut enterotypes, specific bacterial genera, and fine motor activity in infants.
- These findings may indicate potential for probiotic interventions to support motor skill development and address motor disorders.
Background:
During early life, dynamic gut colonization and brain development co-occur with potential cross-talk mechanisms affecting behaviour.
Methods:
We used 16S rRNA gene sequencing to examine the associations between gut microbiota and neurodevelopmental outcomes assessed by the Bayley Scales of Infant Development III in 71 full-term healthy infants at 18 months of age. We hypothesized that children would differ in gut microbial diversity, enterotypes obtained by Dirichlet multinomial mixture analysis and specific taxa based on their behavioural characteristics.
Results:
In children dichotomized by behavioural trait performance in above- and below-median groups, weighted Unifrac b-diversity exhibited significant differences in fine motor (FM) activity. Dirichlet multinomial mixture modelling identified two enterotypes strongly associated with FM outcomes. When controlling for maternal pre-gestational BMI and breastfeeding for up to 3 months, the examination of signature taxa in FM groups showed that Turicibacter and Parabacteroides were highly abundant in the below-median FM group, while Collinsella, Coprococcus, Enterococcus, Fusobacterium, Holdemanella, Propionibacterium, Roseburia, Veillonella, an unassigned genus within Veillonellaceae and, interestingly, probiotic Bifidobacterium and Lactobacillus were more abundant in the above-median FM group.
Conclusions:
Our results suggest an association between enterotypes and specific genera with FM activity and may represent an opportunity for probiotic interventions relevant to treatment for motor disorders.
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