Journal
CELLULAR MICROBIOLOGY
Volume 9, Issue 11, Pages 2543-2551Publisher
WILEY
DOI: 10.1111/j.1462-5822.2007.01022.x
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Funding
- NIAID NIH HHS [AI-65359, R01 AI063302, U54 AI065359] Funding Source: Medline
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Tularaemia is a zoonotic disease caused by the facultative intracellular bacterium Francisella tularensis. The virulence of this pathogen depends on its ability to escape into the cytosol of host cells. Pathogens are detected by the innate immune system's pattern recognition receptors which are activated in response to conserved microbial molecules (pathogen-associated molecular patterns). Cytosolic bacteria are sensed intracellularly, often leading to activation of the cysteine protease caspase-1 within a multimolecular complex called the inflammasome. Caspase-1 activation leads to both host cell death and release of pro-inflammatory cytokines in a process called pyroptosis. Here we review the pathway leading to, and the consequences of, inflammasome activation upon F. tularensis infection both in vitro and in vivo. Finally, we discuss recent data on how other innate immune pathways and F. tularensis virulence factors control the activation of the inflammasome during infection.
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