Going against the tide--how encephalitogenic T cells breach the blood-brain barrier

Lyck, Ruth; Engelhardt, Britta (2012). Going against the tide--how encephalitogenic T cells breach the blood-brain barrier. Journal of vascular research, 49(6), pp. 497-509. Basel: Karger 10.1159/000341232

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During multiple sclerosis or its animal model, experimental autoimmune encephalomyelitis, circulating immune cells enter the central nervous system (CNS) causing neuroinflammation. Extravasation from the blood circulation across the vessel wall occurs through a multistep process regulated by adhesion and signal transducing molecules on the immune cells and on the endothelium. Since the CNS is shielded by the highly specialized blood-brain barrier (BBB), immune cell extravasation into the CNS requires breaching this particularly tight endothelial border. Consequently, travelling into the CNS demands unique adaptations which account for the extreme tightness of the BBB. Modern imaging tools have shown that after arresting on BBB endothelium, in vivo or in vitro encephalitogenic effector/memory T cells crawl for long distances, possibly exceeding 150 µm along the surface of the BBB endothelium before rapidly crossing the BBB. Interestingly, in addition to the distance of crawling, the preferred direction of crawling against the flow is unique for T cell crawling on the luminal surface of CNS microvessels. In this review, we will summarize the cellular and molecular mechanisms involved in the unique T cell behavior that is obviously required for finding a site permissive for diapedesis across the unique vascular bed of the BBB.

Item Type:

Journal Article (Further Contribution)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > Theodor Kocher Institute

UniBE Contributor:

Lyck, Ruth and Engelhardt, Britta

ISSN:

1018-1172

Publisher:

Karger

Funders:

[4] Swiss National Science Foundation
[7] Swiss Multiple Sclerosis Society

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:39

Last Modified:

06 Dec 2013 13:38

Publisher DOI:

10.1159/000341232

PubMed ID:

22948545

Web of Science ID:

000310107800003

URI:

https://boris.unibe.ch/id/eprint/16033 (FactScience: 223583)

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