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Plague bacteria target immune cells during infection.


ABSTRACT: The plague is caused by the bacterium Yersinia pestis. Plague bacteria are thought to inject effector Yop proteins into host cells via the type III pathway. The identity of the host cells targeted for injection during plague infection is unknown. We found, using Yop beta-lactamase hybrids and fluorescent staining of live cells from plague-infected animals, that Y. pestis selected immune cells for injection. In vivo, dendritic cells, macrophages, and neutrophils were injected most frequently, whereas B and T lymphocytes were rarely selected. Thus, it appears that Y. pestis disables these cell populations to annihilate host immune responses during plague.

SUBMITTER: Marketon MM 

PROVIDER: S-EPMC3210820 | biostudies-literature | 2005 Sep

REPOSITORIES: biostudies-literature

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Plague bacteria target immune cells during infection.

Marketon Melanie M MM   DePaolo R William RW   DeBord Kristin L KL   Jabri Bana B   Schneewind Olaf O  

Science (New York, N.Y.) 20050728 5741


The plague is caused by the bacterium Yersinia pestis. Plague bacteria are thought to inject effector Yop proteins into host cells via the type III pathway. The identity of the host cells targeted for injection during plague infection is unknown. We found, using Yop beta-lactamase hybrids and fluorescent staining of live cells from plague-infected animals, that Y. pestis selected immune cells for injection. In vivo, dendritic cells, macrophages, and neutrophils were injected most frequently, whe  ...[more]

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