The contribution of maternal antibodies to the postnatal establishment of oral and salivary mucosal immunity in the offspring is underexplored. Using an experimental mouse model, here the authors show that maternal IgG (transferred in utero or via breastfeeding) shapes oral immune homeostasis in neonates and adults, regulating microbial colonization, adaptive immune responses, and epithelial maturation and integrity. The lack of in-utero-derived IgG increases immune activation, bacterial load, and susceptibility to experimental periodontitis in adulthood.
- Reem Naamneh
- Yarin Attar
- Avi-Hai Hovav