Bacterial interference with canonical NFκB signalling

Microbiology (Reading). 2013 Oct;159(Pt 10):2001-2013. doi: 10.1099/mic.0.069369-0. Epub 2013 Jul 19.

Abstract

The human body is constantly challenged by a variety of commensal and pathogenic micro-organisms that trigger the immune system. Central in the first line of defence is the pattern-recognition receptor (PRR)-induced stimulation of the NFκB pathway, leading to NFκB activation. The subsequent production of pro-inflammatory cytokines and/or antimicrobial peptides results in recruitment of professional phagocytes and bacterial clearance. To overcome this, bacteria have developed mechanisms for targeted interference in every single step in the PRR-NFκB pathway to dampen host inflammatory responses. This review aims to briefly overview the PRR-NFκB pathway in relation to the immune response and give examples of the diverse bacterial evasion mechanisms including changes in the bacterial surface, decoy production and injection of effector molecules. Targeted regulation of inflammatory responses is needed and bacterial molecules developed for immune evasion could provide future anti-inflammatory agents.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Bacteria / immunology*
  • Cytokines / metabolism*
  • Host-Pathogen Interactions*
  • Humans
  • Immune Evasion*
  • Immunity, Innate*
  • Inflammation / immunology
  • Inflammation / microbiology
  • Inflammation / pathology
  • NF-kappa B / metabolism*
  • Receptors, Immunologic / metabolism*
  • Signal Transduction

Substances

  • Cytokines
  • NF-kappa B
  • Receptors, Immunologic