Functional characterization of the dural sinuses as a neuroimmune interface

Cell. 2021 Feb 18;184(4):1000-1016.e27. doi: 10.1016/j.cell.2020.12.040. Epub 2021 Jan 27.

Abstract

Despite the established dogma of central nervous system (CNS) immune privilege, neuroimmune interactions play an active role in diverse neurological disorders. However, the precise mechanisms underlying CNS immune surveillance remain elusive; particularly, the anatomical sites where peripheral adaptive immunity can sample CNS-derived antigens and the cellular and molecular mediators orchestrating this surveillance. Here, we demonstrate that CNS-derived antigens in the cerebrospinal fluid (CSF) accumulate around the dural sinuses, are captured by local antigen-presenting cells, and are presented to patrolling T cells. This surveillance is enabled by endothelial and mural cells forming the sinus stromal niche. T cell recognition of CSF-derived antigens at this site promoted tissue resident phenotypes and effector functions within the dural meninges. These findings highlight the critical role of dural sinuses as a neuroimmune interface, where brain antigens are surveyed under steady-state conditions, and shed light on age-related dysfunction and neuroinflammatory attack in animal models of multiple sclerosis.

Keywords: CNS autoimmunity; CSF flow; antigen presentation; dura mater; meningeal immunity; meningeal lymphatics; meninges; neuroimmunology; sinus; stromal cells.

Publication types

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

MeSH terms

  • Animals
  • Antigen Presentation / immunology
  • Antigen-Presenting Cells / metabolism
  • Antigens / cerebrospinal fluid
  • Cellular Senescence
  • Chemokine CXCL12 / pharmacology
  • Cranial Sinuses / immunology*
  • Cranial Sinuses / physiology*
  • Dura Mater / blood supply
  • Dura Mater / immunology*
  • Dura Mater / physiology*
  • Female
  • Homeostasis
  • Humans
  • Immunity
  • Male
  • Mice, Inbred C57BL
  • Phenotype
  • Stromal Cells / cytology
  • T-Lymphocytes / cytology

Substances

  • Antigens
  • Chemokine CXCL12