Involvement of a 1-Cys Peroxiredoxin in Bacterial Virulence

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Pseudomonas aeruginosa is an important human pathogen that employs a vast arsenal of virulence factors and infects immunocompromised hosts, such as patients in intensive care units, causing pneumonia and other illnesses. Macrophages are cells in the first line of defense against pathogens in the lungs. After pathogen recognition, macrophages release pro-inflammatory cytokines to recruit other immune cells and employ a process known as oxidative burst to kill invading microbes. P. aeruginosa can counteract oxidative stress using antioxidant proteins, such as peroxiredoxins. We show here that LsfA, which belongs to the poorly characterized Prx6 subfamily of peroxiredoxins, is indeed endowed with a thiol-dependent activity that is required for full virulence. In vitro and in vivo infection models confirmed that LsfA peroxidase activity is required for the immunomodulation caused by P. aeruginosa and that its absence allows the host to overcome the infection. This study demonstrates for the first time the involvement of a bacterial Prx6 in virulence.

Vyšlo v časopise: Involvement of a 1-Cys Peroxiredoxin in Bacterial Virulence. PLoS Pathog 10(10): e32767. doi:10.1371/journal.ppat.1004442
Kategorie: Research Article
prolekare.web.journal.doi_sk: https://doi.org/10.1371/journal.ppat.1004442

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