Heterogeneity of meningeal B cells reveals a lymphopoietic niche at the CNS borders
Simone Brioschi, Wei-Le Wang, Vincent Peng, Meng Wang, Irina Shchukina, Zev J Greenberg, Jennifer K Bando, Natalia Jaeger, Rafael S Czepielewski, Amanda Swain, Denis A Mogilenko, Wandy L Beatty, Peter Bayguinov, James A J Fitzpatrick, Laura G Schuettpelz, Catrina C Fronick, Igor Smirnov, Jonathan Kipnis, Virginia S Shapiro, Gregory F Wu, Susan Gilfillan, Marina Cella, Maxim N Artyomov, Steven H Kleinstein, Marco Colonna, Simone Brioschi, Wei-Le Wang, Vincent Peng, Meng Wang, Irina Shchukina, Zev J Greenberg, Jennifer K Bando, Natalia Jaeger, Rafael S Czepielewski, Amanda Swain, Denis A Mogilenko, Wandy L Beatty, Peter Bayguinov, James A J Fitzpatrick, Laura G Schuettpelz, Catrina C Fronick, Igor Smirnov, Jonathan Kipnis, Virginia S Shapiro, Gregory F Wu, Susan Gilfillan, Marina Cella, Maxim N Artyomov, Steven H Kleinstein, Marco Colonna
Abstract
The meninges contain adaptive immune cells that provide immunosurveillance of the central nervous system (CNS). These cells are thought to derive from the systemic circulation. Through single-cell analyses, confocal imaging, bone marrow chimeras, and parabiosis experiments, we show that meningeal B cells derive locally from the calvaria, which harbors a bone marrow niche for hematopoiesis. B cells reach the meninges from the calvaria through specialized vascular connections. This calvarial-meningeal path of B cell development may provide the CNS with a constant supply of B cells educated by CNS antigens. Conversely, we show that a subset of antigen-experienced B cells that populate the meninges in aging mice are blood-borne. These results identify a private source for meningeal B cells, which may help maintain immune privilege within the CNS.
Conflict of interest statement
Competing interests: All authors declare no conflict of interest.
Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.
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Source: PubMed