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L-selectin Is Essential for Delivery of Activated CD8(+) T Cells to Virus-Infected Organs for Protective Immunity.

Abstract：

: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.

journal_name

Cell Rep

journal_title

Cell reports

authors

Mohammed RN,Watson HA,Vigar M,Ohme J,Thomson A,Humphreys IR,Ager A

doi

10.1016/j.celrep.2015.12.090

subject

Has Abstract

pub_date

2016-02-02 00:00:00

pages

760-771

issue

4

issn

2211-1247

pii

S2211-1247(15)01546-6

journal_volume

14

pub_type

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