Intracellular Staphylococcus aureus eludes selective autophagy by activating a host cell kinase.

Abstract:

:Autophagy, a catabolic pathway of lysosomal degradation, acts not only as an efficient recycle and survival mechanism during cellular stress, but also as an anti-infective machinery. The human pathogen Staphylococcus aureus (S. aureus) was originally considered solely as an extracellular bacterium, but is now recognized additionally to invade host cells, which might be crucial for persistence. However, the intracellular fate of S. aureus is incompletely understood. Here, we show for the first time induction of selective autophagy by S. aureus infection, its escape from autophagosomes and proliferation in the cytoplasm using live cell imaging. After invasion, S. aureus becomes ubiquitinated and recognized by receptor proteins such as SQSTM1/p62 leading to phagophore recruitment. Yet, S. aureus evades phagophores and prevents further degradation by a MAPK14/p38α MAP kinase-mediated blockade of autophagy. Our study demonstrates a novel bacterial strategy to block autophagy and secure survival inside the host cell.

journal_name

Autophagy

journal_title

Autophagy

authors

Neumann Y,Bruns SA,Rohde M,Prajsnar TK,Foster SJ,Schmitz I

doi

10.1080/15548627.2016.1226732

subject

Has Abstract

pub_date

2016-11-01 00:00:00

pages

2069-2084

issue

11

eissn

1554-8627

issn

1554-8635

journal_volume

12

pub_type

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