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© Christine Schmitt, Meriem El Ghachi, Jean-Marc Panaud
Bactérie Helicobacter pylori en microscopie électronique à balayage. Agent causal de pathologies de l'estomac : elle est responsable des gastrites chroniques, d'ulcères gastriques et duodénaux et elle joue un rôle important dans la genèse des cancers gastriques (adénocarcinomes et lymphomes).
Publication : FEMS microbiology reviews

Uptake, recognition and responses to peptidoglycan in the mammalian host.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in FEMS microbiology reviews - 08 Sep 2020

Bastos PAD, Wheeler R, Boneca IG,

Link to Pubmed [PMID] – 32897324

Link to DOI [DOI] – fuaa04410.1093/femsre/fuaa044

FEMS Microbiol. Rev. 2020 Sep; ():

Microbiota, and the plethora of signalling molecules that they generate, are a major driving force that underlies a striking range of inter-individual physioanatomic and behavioural consequences for the host organism. Among the bacterial effectors, one finds peptidoglycan, the major constituent of the bacterial cell surface. In the steady-state, fragments of peptidoglycan are constitutively liberated from bacterial members of the gut microbiota, cross the gut epithelial barrier and enter the host system. The fate of these peptidoglycan fragments, and the outcome for the host, depends on the molecular nature of the peptidoglycan, as well the cellular profile of the recipient tissue, mechanism of cell entry, the expression of specific processing and recognition mechanisms by the cell, and the local immune context. At the target level, physiological processes modulated by peptidoglycan are extremely diverse, ranging from immune activation to small molecule metabolism, autophagy and apoptosis. In this review, we bring together a fragmented body of literature on the kinetics and dynamics of peptidoglycan interactions with the mammalian host, explaining how peptidoglycan functions as a signaling molecule in the host under physiological conditions, how it disseminates within the host, and the cellular responses to peptidoglycan.

https://pubmed.ncbi.nlm.nih.gov/32897324