Proteomic analysis of Acanthamoeba castellanii response to Legionella pneumophila infection.

Autor:	Hay A; Ecologie et Biologie des Interactions, UMR CNRS 7267, Université de Poitiers, 86073 Poitiers, France., Rolland S; Ecologie et Biologie des Interactions, UMR CNRS 7267, Université de Poitiers, 86073 Poitiers, France., Bernard C; Ecologie et Biologie des Interactions, UMR CNRS 7267, Université de Poitiers, 86073 Poitiers, France., Héchard Y; Ecologie et Biologie des Interactions, UMR CNRS 7267, Université de Poitiers, 86073 Poitiers, France., Villéger R; Ecologie et Biologie des Interactions, UMR CNRS 7267, Université de Poitiers, 86073 Poitiers, France., Samba-Louaka A; Ecologie et Biologie des Interactions, UMR CNRS 7267, Université de Poitiers, 86073 Poitiers, France.
Jazyk:	angličtina
Zdroj:	FEMS microbiology letters [FEMS Microbiol Lett] 2023 Jan 17; Vol. 370.
DOI:	10.1093/femsle/fnad086
Abstrakt:	Legionella pneumophila is an opportunistic pathogen responsible for Legionnaires' disease or Legionellosis. This bacterium is found in the environment interacting with free-living amoebae such as Acanthamoeba castellanii. Until now, proteomic analyses have been done in amoebae infected with L. pneumophila but focused on the Legionella-containing vacuole. In this study, we propose a global proteomic analysis of the A. castellanii proteome following infection with L. pneumophila wild-type (WT) or with an isogenic ΔdotA mutant strain, which is unable to replicate intracellularly. We found that infection with L. pneumophila WT leads to reduced levels of A. castellanii proteins associated with lipid homeostasis/metabolism, GTPase regulation, and kinase. The levels of organelle-associated proteins were also decreased during infection. Legionellapneumophila WT infection leads to increased levels of proteins associated with polyubiquitination, folding or degradation, and antioxidant activities. This study reinforces our knowledge of this too little explored but so fundamental interaction between L. pneumophila and A. castellanii, to understand how the bacterium could resist amoeba digestion. (© The Author(s) 2023. Published by Oxford University Press on behalf of FEMS.)
Databáze:	MEDLINE
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