Dectin-1 limits autoimmune neuroinflammation and promotes myeloid cell-astrocyte crosstalk via Card9-independent expression of Oncostatin M.

Journal Article (Journal Article)

Pathologic roles of innate immunity in neurologic disorders are well described, but their beneficial aspects are less understood. Dectin-1, a C-type lectin receptor (CLR), is largely known to induce inflammation. Here, we report that Dectin-1 limited experimental autoimmune encephalomyelitis (EAE), while its downstream signaling molecule, Card9, promoted the disease. Myeloid cells mediated the pro-resolution function of Dectin-1 in EAE with enhanced gene expression of the neuroprotective molecule, Oncostatin M (Osm), through a Card9-independent pathway, mediated by the transcription factor NFAT. Furthermore, we find that the Osm receptor (OsmR) functioned specifically in astrocytes to reduce EAE severity. Notably, Dectin-1 did not respond to heat-killed Mycobacteria, an adjuvant to induce EAE. Instead, endogenous Dectin-1 ligands, including galectin-9, in the central nervous system (CNS) were involved to limit EAE. Our study reveals a mechanism of beneficial myeloid cell-astrocyte crosstalk regulated by a Dectin-1 pathway and identifies potential therapeutic targets for autoimmune neuroinflammation.

Full Text

Duke Authors

Cited Authors

  • Deerhake, ME; Danzaki, K; Inoue, M; Cardakli, ED; Nonaka, T; Aggarwal, N; Barclay, WE; Ji, R-R; Shinohara, ML

Published Date

  • March 9, 2021

Published In

Volume / Issue

  • 54 / 3

Start / End Page

  • 484 - 498.e8

PubMed ID

  • 33581044

Pubmed Central ID

  • PMC7956124

Electronic International Standard Serial Number (EISSN)

  • 1097-4180

Digital Object Identifier (DOI)

  • 10.1016/j.immuni.2021.01.004

Language

  • eng

Conference Location

  • United States