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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 : Microbial drug resistance (Larchmont, N.Y.)

The effect of bulgecin A on peptidoglycan metabolism and physiology of Helicobacter pylori

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Microbial drug resistance (Larchmont, N.Y.) - 20 Mar 2012

Bonis M, Williams A, Guadagnini S, Werts C, Boneca IG

Link to Pubmed [PMID] – 22432710

Microb. Drug Resist. 2012 Jun;18(3):230-9

Helicobacter pylori, a human-specific bacterial pathogen responsible for severe gastric diseases, constitutes a major public health issue. In the last decade, rates of H. pylori resistance to antibiotics were increasing drastically, requiring alternative therapeutic strategies to deal with eradication failures. Therefore, we evaluated the potential of bulgecin A, a glycosidic inhibitor of the lytic transglycosylase (LTG) Slt70 of Escherichia coli, as a new therapeutic approach against the H. pylori infection. In this study, we show that bulgecin A is able to specifically inactivate the H. pylori LTG Slt, but not its ortholog MltD. Moreover, bulgecin A synergized with amoxicillin, an inhibitor of penicillin binding proteins, inducing strong morphological alterations, cellular damages, and cell death. Similarly, the simultaneous inactivation of the peptidoglycan (PG) peptidase HdpA and Slt led to inhibition of H. pylori growth, highlighting the strong potential of targeting the PG biosynthetic pathway at different biochemical steps to enhance our therapeutic approaches against bacteria. Hence, we propose that bulgecin A constitutes an attractive compound for the development of new therapeutic strategies against H. pylori combined with other inhibitors of PG biosynthetic enzymes.

https://www.ncbi.nlm.nih.gov/pubmed/22432710