Amphiregulin producing γδ T cells are vital for safeguarding oral barrier immune homeostasis

Research output: Contribution to journalArticle

  • External authors:
  • Siddharth Krishnan
  • Ian Prise
  • Kelly Wemyss
  • Louis Schenck
  • Hayley Bridgeman
  • Flora Mcclure
  • Tamsin Zangerle Murray
  • Conor O'Boyle
  • Thomas Barbera
  • Faiza Mahmood
  • Dawn. M. E Bowdish
  • Dietmar M Zaiss

Abstract

γδ T cells are enriched at barrier sites such as the gut, skin, and lung, where their roles in maintaining barrier integrity are well established. However, how these cells contribute to homeostasis at the gingiva, a key oral barrier and site of the common chronic inflammatory disease periodontitis, has not been explored. Here we demonstrate that the gingiva is policed by γδ T cells with a T cell receptor (TCR) repertoire that diversifies during development. Gingival γδ T cells accumulated rapidly after birth in response to barrier damage, and strikingly, their absence resulted in enhanced pathology inmurine models of the oral inflammatory disease periodontitis. Alterations in bacterial communities could not account for the increased disease severity seen in γδ T cell-deficient mice. Instead, gingival γδ T cells produced the wound healing associated cytokine amphiregulin, administration of which rescued the elevated oral pathology of tcrδ -/- mice. Collectively, our results identify γδ T cells as critical constituents of the immuno-surveillance network that safeguard gingival tissue homeostasis.

Bibliographical metadata

Original languageEnglish
Pages (from-to)10738-10743
Number of pages6
JournalProceedings of the National Academy of Sciences
Volume115
Issue number42
Early online date2 Oct 2018
DOIs
Publication statusPublished - 16 Oct 2018