Immune 106: Science and podcasting with Kathryn Knoop and Marion Brunck

Mucosal immunology centers on the complex regulation of the intestinal barrier, where specialized cells must distinguish between harmful pathogens and essential dietary antigens. Goblet cells facilitate this process by forming antigen passages, a mechanism regulated by components in breast milk such as epidermal growth factor (EGF). These factors are critical during the neonatal period, helping to maintain gut tolerance and prevent pathogen encroachment. Beyond these barriers, neonatal gamma-delta T cells serve as early responders to infection, though their activation can sometimes lead to excessive inflammation. Research also highlights the impact of maternal metabolic states, such as obesity, on the composition of breast milk, including altered levels of IgG and IgA. These findings underscore the importance of understanding how maternal health and milk composition influence infant immune development and susceptibility to disease.