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L-selectin is essential for delivery of activated CD8+ T cells to virus-infected organs for protective immunity

Mohammed, Rebar N., Watson, H. Angharad, Vigar, Miriam, Ohme, Julia, Thomson, Amanda, Humphreys, Ian R. ORCID: and Ager, Ann ORCID: 2016. L-selectin is essential for delivery of activated CD8+ T cells to virus-infected organs for protective immunity. Cell Reports 14 (4) , pp. 760-771. 10.1016/j.celrep.2015.12.090

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Cytotoxic CD8+ T lymphocytes play a critical role in the host response to infection by viruses. The ability to secrete cytotoxic chemicals and cytokines is considered pivotal for eliminating virus. Of equal importance is how effector CD8+ T cells home to virus-infected tissues. L-selectin has not been considered important for effector T cell homing, because levels are low on activated T cells. We report here that, although L-selectin expression is downregulated following T cell priming in lymph nodes, L-selectin is re-expressed on activated CD8+ T cells entering the bloodstream, and recruitment of activated CD8+ T cells from the bloodstream into virus-infected tissues is L-selectin dependent. Furthermore, L-selectin on effector CD8+ T cells confers protective immunity to two evolutionally distinct viruses, vaccinia and influenza, which infect mucosal and visceral organs, respectively. These results connect homing and a function of virus-specific CD8+ T cells to a single molecule, L-selectin.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
Subjects: R Medicine > R Medicine (General)
Additional Information: Available online 21 January 2016
Publisher: Elsevier
ISSN: 2211-1247
Funders: MRC
Date of First Compliant Deposit: 30 March 2016
Date of Acceptance: 18 December 2015
Last Modified: 28 May 2023 19:21

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