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Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
Effector T cell interactions with meningeal vascular structures in nascent autoimmune CNS lesions.
Nature 462, 94-98 (2009)
The tissues of the central nervous system are effectively shielded from the blood circulation by specialized vessels that are impermeable not only to cells, but also to most macromolecules circulating in the blood. Despite this seemingly absolute seclusion, central nervous system tissues are subject to immune surveillance and are vulnerable to autoimmune attacks. Using intravital two-photon imaging in a Lewis rat model of experimental autoimmune encephalomyelitis, here we present in real-time the interactive processes between effector T cells and cerebral structures from their first arrival to manifest autoimmune disease. We observed that incoming effector T cells successively scanned three planes. The T cells got arrested to leptomeningeal vessels and immediately monitored the luminal surface, crawling preferentially against the blood flow. After diapedesis, the cells continued their scan on the abluminal vascular surface and the underlying leptomeningeal (pial) membrane. There, the T cells encountered phagocytes that effectively present antigens, foreign as well as myelin proteins. These contacts stimulated the effector T cells to produce pro-inflammatory mediators, and provided a trigger to tissue invasion and the formation of inflammatory infiltrations.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
experimental allergic encephalomyelitis; cental-nervous-system; germline transmission; dendritic cells; choroid-plexus; antigen; protein; lymphocytes; brain; extravasation
ISSN (print) / ISBN
0028-0836
e-ISSN
1476-4687
Zeitschrift
Nature
Quellenangaben
Band: 462,
Heft: 7269,
Seiten: 94-98
Verlag
Nature Publishing Group
Verlagsort
London
Begutachtungsstatus
Peer reviewed
Institut(e)
Institute of Molecular Immunology (IMI)