B-cells expressing NgR1 and NgR3 are localized to EAE-induced inflammatory infiltrates and are stimulated by BAFF

Sci Rep. 2021 Feb 3;11(1):2890. doi: 10.1038/s41598-021-82346-6.

Abstract

We have previously reported evidence that Nogo-A activation of Nogo-receptor 1 (NgR1) can drive axonal dystrophy during the neurological progression of experimental autoimmune encephalomyelitis (EAE). However, the B-cell activating factor (BAFF/BlyS) may also be an important ligand of NgR during neuroinflammation. In the current study we define that NgR1 and its homologs may contribute to immune cell signaling during EAE. Meningeal B-cells expressing NgR1 and NgR3 were identified within the lumbosacral spinal cords of ngr1+/+ EAE-induced mice at clinical score 1. Furthermore, increased secretion of immunoglobulins that bound to central nervous system myelin were shown to be generated from isolated NgR1- and NgR3-expressing B-cells of ngr1+/+ EAE-induced mice. In vitro BAFF stimulation of NgR1- and NgR3-expressing B cells, directed them into the cell cycle DNA synthesis phase. However, when we antagonized BAFF signaling by co-incubation with recombinant BAFF-R, NgR1-Fc, or NgR3 peptides, the B cells remained in the G0/G1 phase. The data suggest that B cells express NgR1 and NgR3 during EAE, being localized to infiltrates of the meninges and that their regulation is governed by BAFF signaling.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • B-Cell Activating Factor / metabolism*
  • B-Lymphocytes / immunology*
  • B-Lymphocytes / metabolism
  • Encephalomyelitis, Autoimmune, Experimental / immunology*
  • Encephalomyelitis, Autoimmune, Experimental / pathology
  • Female
  • Humans
  • Meninges / immunology
  • Meninges / pathology*
  • Mice
  • Mice, Knockout
  • Multiple Sclerosis / immunology*
  • Multiple Sclerosis / pathology
  • Nogo Proteins / metabolism
  • Nogo Receptor 1 / genetics
  • Nogo Receptor 1 / metabolism
  • Nogo Receptors / metabolism

Substances

  • B-Cell Activating Factor
  • Nogo Proteins
  • Nogo Receptor 1
  • Nogo Receptors
  • Rtn4r protein, mouse
  • Rtn4rl1 protein, mouse
  • Tnfsf13b protein, mouse