Maturation of the neonatal oral mucosa involves unique epithelium-microbiota interactions.
Cell Host Microbe
; 29(2): 197-209.e5, 2021 02 10.
Article
in En
| MEDLINE
| ID: mdl-33412104
ABSTRACT
Postnatal host-microbiota interplay governs mucosal homeostasis and is considered to have life-long health consequences. The intestine monolayer epithelium is critically involved in such early-life processes; nevertheless, the role of the oral multilayer epithelium remains ill defined. We demonstrate that unlike the intestine, the neonate oral cavity is immensely colonized by the microbiota that decline to adult levels during weaning. Neutrophils are present in the oral epithelium prenatally, and exposure to the microbiota postnatally further recruits them to the preamble neonatal epithelium by γδT17 cells. These neutrophils virtually disappear during weaning as the epithelium seals. The neonate and adult epithelium display distinct turnover kinetics and transcriptomic signatures, with neonate epithelium reminiscent of the signature found in germ-free mice. Microbial reduction during weaning is mediated by the upregulation of saliva production and induction of salivary antimicrobial components by the microbiota. Collectively, unique postnatal interactions between the multilayer epithelium and microbiota shape oral homeostasis.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Saliva
/
Receptors, Antigen, T-Cell, gamma-delta
/
Bacterial Load
/
Mouth Mucosa
/
Neutrophils
Limits:
Animals
Language:
En
Journal:
Cell Host Microbe
Journal subject:
MICROBIOLOGIA
Year:
2021
Document type:
Article
Affiliation country:
Israel