Breastfeeding plays a crucial role in shaping an infant’s microbiome and promoting lung health, according to a recent study published in the journal Cell. Researchers from NYU Langone Health and the University of Manitoba found that breastfeeding beyond three months supports the gradual maturation of the microbiome in a baby’s digestive system and nasal cavity, reducing the risk of developing asthma in early childhood.
The study revealed that human breast milk contains components, such as human milk oligosaccharides, that can only be broken down by specific microbes. These microbes are essential for the digestion of these sugars, giving them a competitive advantage in the infant’s gut. Infants who are weaned from breast milk before three months and transition to formula feeding harbor a different set of microbes, which may increase the risk of developing asthma later on.
Lead researcher Dr. Liat Shenhav explained that breastfeeding regulates the pace and sequence of microbial colonization in a baby’s gut and nasal cavity, ensuring a timely and orderly development of the microbiome. The study tracked the microbial composition in infants over their first year of life and found that breastfeeding duration significantly influenced the microbial makeup, even after accounting for other environmental factors.
One key finding of the study was the early appearance of a bacterial species called Ruminococcus gnavus in infants weaned early from breast milk. This bacterium has been associated with the production of molecules linked to immune system regulation and asthma risk. The researchers emphasized the importance of a healthy microbiome in immune system development and respiratory health in infants.
By analyzing data from the CHILD Cohort Study, researchers were able to predict asthma risk accurately using machine learning models based on microbial dynamics and milk components. They also established a statistical model that identified breastfeeding as the primary factor in reducing asthma risk through microbiome shaping.
Dr. Shenhav highlighted the significance of their findings in informing national guidelines on breastfeeding and weaning practices. The research aims to develop strategies to prevent asthma in children who cannot be breastfed for at least three months. By understanding the mechanisms behind the protective effects of breast milk, the study provides valuable insights into early-life microbial dynamics and their impact on respiratory health.
The study, titled “Microbial colonization programs are structured by breastfeeding and guide healthy respiratory development,” was published in Cell and sheds light on the intricate relationship between breastfeeding, microbiome development, and respiratory health in infants. Further research in this area could lead to innovative strategies for asthma prevention and improved pediatric healthcare.
