Maternal nutrition and its impact on neonatal immune development

IntroductionIn the realm of neonatal health, comprehending the relationship between maternal nutrition and immune system development is essential.The neonatal immune system, akin to a complex ecosystem, is shaped by maternal dietary factors starting from gestation. 1 From conception, nutrients transferred through placenta influence immune development, followed by breast milk providing immunoglobulins, lactoferrin, and human milk oligosaccharides (HMOs) postnatally.2 These elements lay the groundwork for immune cell differentiation and microbial colonization, crucial for neonatal health.3 Imbalances in maternal nutrition, like undernutrition or overnutrition, disrupt this process, heightening risk of infections and allergic conditions.4 Progress in noninvasive diagnostics, like biomarker analysis in saliva and breast milk, has revolutionized our ability to monitor these interactions, offering insights for customized nutritional strategies.5 This article examines the mechanisms by which maternal nutrition influences neonatal immunity, focusing on microbial interactions, nutrient transfer, and diagnostic advancements. Development of the Neonatal Immune SystemThe neonatal immune system evolves dynamically, starting in utero and extending into early infancy.Maternal nutrients and microbial metabolites cross the placenta, priming fetal immune cells and establishing the foundation for immune competence.After birth, breast milk delivers essential immune-modulating factors, including immunoglobulins, lactoferrin, and HMOs, which foster microbial colonization and immune development.The neonatal period and infancy are critical for building immune competence, influenced by maternal dietary exposures.6 The gut microbiome plays a pivotal role in immune maturation, guiding T-cell differentiation and cytokine production.7 Maternal diet shapes the microbial composition of amniotic fluid and breast milk, seeding the neonatal gut with beneficial bacteria such as Bifidobacterium and Lactobacillus.8 These microbes promote immune tolerance and reduce the risk of allergic diseases.For example, maternal probiotic supplementation during pregnancy has been associated ______________________________________________