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Eur J Immunol. 2009 Jun;39(6):1536-43. doi: 10.1002/eji.200839165.

The level of B7 homologue 1 expression on brain DC is decisive for CD8 Treg cell recruitment into the CNS during EAE.

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University of Wuerzburg, Department of Neurology, Wuerzburg, Germany.


DC in the CNS have emerged as the major rate-limiting factor for immune invasion and subsequent neuroinflammation during EAE. The mechanism of how this is regulated by brain-localized DC remains unknown. Here, we describe the ability of brain-localized DC expressing B7-H1 molecules to recruit CD8(+) T cells to the site of inflammation. Using intracerebral microinjections of B7-homologue 1-deficient DC, we demonstrate a substantial brain infiltration of CD8(+) T cells displaying a regulatory phenotype (CD122(+)) and function, resulting in a decrease of EAE peak clinical values. The recruitment of regulatory-type CD8(+) T cells into the CNS and the role of brain DC expressing B7-homologue 1 molecules in this process open up the possibility of DC-targeted therapeutic manipulation of neuroinflammatory diseases.

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