In The Journal of Immunology, Nova Scholar Susan Prescott and coauthors investigate how early nutrition influences immune development and allergy risk in infants with family histories of allergic disease.
Many babies born to families with allergies have temporarily low levels of protein kinase C zeta (PKCζ) in their cord blood T cells. These infants show increased allergic sensitization by age 2.5. The research team identified the critical window when PKCζ levels are deficient after birth and demonstrated that polyunsaturated fatty acids can normalize PKCζ levels during this period. When exposed to these nutrients, neonatal T cells shifted from an allergy-promoting Th2 profile to a protective Th1 profile. This work modifies the hygiene hypothesis by showing targeted nutritional interventions during early infancy could help prevent allergic sensitization in at-risk children.





