Interleukin-6 produced by enteric neurons regulates the number and phenotype of microbe-responsive regulatory T cells in the gut

Yiqing Yan, Deepshika Ramanan, Milena Rozenberg, Kelly McGovern, Daniella Rastelli, Brinda Vijaykumar, Omar Yaghi, Tiphaine Voisin, Munir Mosaheb, Isaac Chiu, Shalev Itzkovitz, Meenakshi Rao, Diane Mathis, Christophe Benoist

Research output: Contribution to journalArticlepeer-review

Abstract

The immune and enteric nervous (ENS) systems monitor the frontier with commensal and pathogenic microbes in the colon. We investigated whether FoxP3+ regulatory T (Treg) cells functionally interact with the ENS. Indeed, microbe-responsive RORγ+ and Helios+ subsets localized in close apposition to nitrergic and peptidergic nerve fibers in the colon lamina propria (LP). Enteric neurons inhibited in vitro Treg (iTreg) differentiation in a cell-contact-independent manner. A screen of neuron-secreted factors revealed a role for interleukin-6 (IL-6) in modulating iTreg formation and their RORγ+ proportion. Colonization of germfree mice with commensals, especially RORγ+ Treg inducers, broadly diminished colon neuronal density. Closing the triangle, conditional ablation of IL-6 in neurons increased total Treg cells but decreased the RORγ+ subset, as did depletion of two ENS neurotransmitters. Our findings suggest a regulatory circuit wherein microbial signals condition neuronal density and activation, thus tuning Treg cell generation and immunological tolerance in the gut.
Original languageEnglish
Pages (from-to)499-513.e5
Number of pages21
JournalImmunity (Cambridge, Mass.)
Volume54
Issue number3
DOIs
StatePublished - 9 Mar 2021

Fingerprint

Dive into the research topics of 'Interleukin-6 produced by enteric neurons regulates the number and phenotype of microbe-responsive regulatory T cells in the gut'. Together they form a unique fingerprint.

Cite this