Maternal diet shapes neonatal microbiome ontogenesis and neurometabolic resilience.
Maternal diets rich in omega-3 fatty acids may positively influence offspring metabolism and neurodevelopment, but further research is needed to confirm these effects in humans.
Where it sits
this study against the rest of the lanreotide corpusSummary and findings
This study examined the effects of maternal diets high in saturated fatty acids (SFA), omega-6 (n6), or omega-3 (n3) on neonatal metabolism and gut microbiome in C57BL/6 mice. Offspring were maintained on a Western-style diet for 10 weeks after exposure to maternal diets during gestation and lactation. The findings suggest that maternal n3 diets may induce beneficial metabolic and neurodevelopmental outcomes.
Abstract
Maternal diet high in saturated fatty acids (SFA) promote infant gut dysbiosis and impairs metabolic and neurocognitive outcomes; however, the protective potential of maternal polyunsaturated fatty acids (PUFA), particularly omega-3 (n3), remains unclear. This study examined how maternal diets enriched in SFA (20% milk fat), omega-6 (n6; 20% corn oil), or omega-3 (n3; 19% olive oil + 1% fish oil) influence neonatal metabolism, neurodevelopment, the gut microbiome, the gut-blood-brain metabolomes, and the brain lipidome in C57BL/6 mice. The offspring were exposed to these diets only during gestation and lactation and then maintained on a Western-style diet for 10 weeks. Compared to SFA, maternal PUFA-rich diets induced distinct and persistent microbiome signatures and reshaped the gut and systemic metabolomic profiles into adulthood. The offspring of n3-fed dams displayed higher lean-to-fat mass ratios, improved ileal morphology, and enhanced gut epithelial integrity. Chronic low-grade inflammation (MCP-1) along the gut-blood-brain axis was markedly reduced in n3 offspring. Moreover, maternal n3 intake enhanced synaptic plasticity, suppressed neuroinflammation, and enriched brain lipids and metabolites associated with membrane integrity, neuronal signaling, and anti-inflammatory pathways. Overall, maternal omega-3 intake confers long-term neuroprotective effects by modulating brain lipid remodeling and the gut-brain-immune axis.
Background
This paper addresses the impact of maternal diet on the development of the neonatal microbiome and subsequent neurocognitive outcomes. Prior research has indicated that diets high in saturated fatty acids can lead to gut dysbiosis and negative metabolic effects. Understanding the protective role of polyunsaturated fatty acids, especially omega-3, is crucial for potential dietary recommendations during pregnancy.
Methods
The study utilized a rodent model with C57BL/6 mice. Maternal diets were enriched in SFA (20% milk fat), omega-6 (20% corn oil), or omega-3 (19% olive oil + 1% fish oil) during gestation and lactation. Offspring were then maintained on a Western-style diet for 10 weeks. Primary outcomes included metabolic profiles, gut microbiome composition, and neurodevelopmental markers.
Results
Maternal n3 diets resulted in higher lean-to-fat mass ratios in offspring compared to those from SFA diets. Additionally, ileal morphology was improved, and chronic low-grade inflammation (MCP-1) was reduced in n3 offspring. Enhanced synaptic plasticity and enriched brain lipids were also observed in the n3 group.
Interpretation
The findings suggest that maternal omega-3 intake has beneficial effects on offspring metabolism and neurodevelopment, aligning with some existing literature on the importance of maternal nutrition. However, the clinical significance of these findings remains uncertain, particularly given the rodent model and the lack of direct human data. Potential confounds include small sample size and the short duration of dietary exposure post-lactation.
Key findings
- Higher lean-to-fat mass ratios in n3 offspring compared to SFA offspring.
- Improved ileal morphology in n3 offspring.
- Reduced chronic low-grade inflammation (MCP-1) in n3 offspring.
- Enhanced synaptic plasticity in n3 offspring.
- Enriched brain lipids and metabolites associated with membrane integrity in n3 offspring.
Limitations
- Rodent model may not directly translate to humans.
- Long-term effects beyond 10 weeks not assessed.
- Small sample size not reported.
- Single-site study limits generalizability.