Yasuyuki Matsuda, Hajime Yamauchi, Hideki Hara

Activation of inflammasomes and mechanisms for intracellular recognition of Listeria monocytogenes

  • Virology
  • Immunology
  • Microbiology
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AbstractThe high mortality rate associated with Listeria monocytogenes can be attributed to its ability to invade the body systemically and to activate inflammasomes. Both of these processes are facilitated by expressing a major virulence factor known as listeriolysin O, a 56 kDa pore‐forming protein encoded by the hly gene. Listeriolysin O plays a crucial role in the pathogenesis of the bacterium by facilitating the escape of the pathogen from the phagosome into the cytosol. This process is essential for the successful establishment of infection. In addition, listeriolysin O is known as an immunomodulator that activates host signal transduction. In addition to listeriolysin O, Listeria expresses a variety of bacterial ligands, such as lipoteichoic acid, nucleotide, and flagellin, that are recognized by host intracellular pattern‐recognition receptors including Nod‐like receptors, AIM2‐like receptors, and RIG‐I‐like receptors. This review introduces intracellular recognition of Listeria monocytogenes since recent studies have revealed that the activation of inflammasome exacerbates Gram‐positive bacteria infection.

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