Maturation of the neonatal oral mucosa involves unique epithelium-microbiota interactions

Noam Koren, Khaled Zubeidat, Yasmin Saba, Yael Horev, Or Barel, Anneke Wilharm, Oded Heyman, Sharon Wald, Luba Eli-berchoer, Hagit Shapiro, Chen Nadler, Eran Elinav, Asaf Wilensky, Immo Prinz, Hillel Bercovier, Avi Hai Hovav*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

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.

Original languageAmerican English
Pages (from-to)197-209.e5
JournalCell Host and Microbe
Volume29
Issue number2
DOIs
StatePublished - 10 Feb 2021

Bibliographical note

Publisher Copyright:
© 2020 Elsevier Inc.

Keywords

  • epithelium
  • microbiota
  • neonatal immunity
  • neutrophils
  • oral mucosa
  • γδ T cells

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