CNS Pericytes Modulate Local T Cell Infiltration in EAE

Pericytes at the blood–brain barrier (BBB) are located between the tight endothelial cell layer of the blood vessels and astrocytic endfeet. They contribute to central nervous system (CNS) homeostasis by regulating BBB development and maintenance. Loss of pericytes results in increased numbers of in...

Verfasser: Koch, Kathrin
Lindner, Maren
Fleck, Ann-Katrin
Liebmann, Marie
Eschborn, Melanie
Zondler, Lisa
Diéguez-Hurtado, Rodrigo
Adams, Ralf H.
Meyer zu Hörste, Gerd
Zarbock, Alexander
Kuhlmann, Tanja
Wiendl, Heinz
Klotz, Luisa Hildegard
FB/Einrichtung:FB 05: Medizinische Fakultät
Dokumenttypen:Artikel
Medientypen:Text
Erscheinungsdatum:2022
Publikation in MIAMI:26.06.2023
Datum der letzten Änderung:26.06.2023
Angaben zur Ausgabe:[Electronic ed.]
Quelle:International Journal of Molecular Sciences 23 (2022) 21, 13081, 1-14
Schlagwörter:pericytes; blood–brain barrier; experimental autoimmune encephalomyelitis; multiple sclerosis; antigen presentation; central nervous system
Fachgebiet (DDC):610: Medizin und Gesundheit
Lizenz:CC BY 4.0
Sprache:English
Förderung:Finanziert durch den Open-Access-Publikationsfonds der Westfälischen Wilhelms-Universität Münster (WWU Münster).
Format:PDF-Dokument
URN:urn:nbn:de:hbz:6-39998525152
Weitere Identifikatoren:DOI: 10.17879/99998736525
Permalink:https://nbn-resolving.de/urn:nbn:de:hbz:6-39998525152
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    Pericytes at the blood–brain barrier (BBB) are located between the tight endothelial cell layer of the blood vessels and astrocytic endfeet. They contribute to central nervous system (CNS) homeostasis by regulating BBB development and maintenance. Loss of pericytes results in increased numbers of infiltrating immune cells in the CNS in experimental autoimmune encephalomyelitis (EAE), the mouse model for multiple sclerosis (MS). However, little is known about their competence to modulate immune cell activation or function in CNS autoimmunity. To evaluate the capacity of pericytes to directly interact with T cells in an antigen-specific fashion and potentially (re)shape their function, we depleted major histocompatibility complex (MHC) class II from pericytes in a cell type-specific fashion and performed T cell-pericyte cocultures and EAE experiments. We found that pericytes present antigen in vitro to induce T cell activation and proliferation. In an adoptive transfer EAE experiment, pericyte-specific MHC II KO resulted in locally enhanced T cell infiltration in the CNS; even though, overall disease course of mice was not affected. Thus, pericytes may serve as non-professional antigen-presenting cells affecting states of T cell activation, thereby locally shaping lesion formation in CNS inflammation but without modulating disease severity.