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Pseudomonas aeruginosa quorum sensing modulates immune responses: An updated review article

Ashraf Kariminik1, Majid Baseri-Salehi2, Babak Kheirkhah1

  • 1Department of Microbiology, Kerman Branch, Islamic Azad University, Kerman, Iran.

Immunology Letters
|July 13, 2017
PubMed

Insights

Pseudomonas aeruginosa uses quorum sensing systems to regulate gene expression and overcome host immune responses, particularly in immunocompromised patients. This review explores these effects on immunity.

Area of Science:

  • Microbiology
  • Immunology
  • Bacterial Pathogenesis

Background:

  • * Pseudomonas aeruginosa is an opportunistic pathogen causing severe infections in immunocompromised individuals.
  • * Quorum sensing (QS) is a cell-to-cell communication mechanism regulating bacterial behavior, including virulence.
  • * Key QS systems in P. aeruginosa include LasI/LasR and RhlI/RhlR.

Purpose of the Study:

  • * To review recent findings on the impact of P. aeruginosa QS systems on host immune responses.
  • * To elucidate the mechanisms by which QS influences bacterial pathogenesis and immune evasion.

Main Methods:

  • * Literature review of studies investigating Pseudomonas aeruginosa quorum sensing.
  • * Analysis of research focusing on the interplay between bacterial QS and host immunity.
  • * Synthesis of current knowledge on LasI/LasR and RhlI/RhlR systems' roles.

Main Results:

  • * Quorum sensing enables P. aeruginosa to coordinate virulence factor production.
  • * QS pathways are implicated in the bacterium's ability to evade or manipulate host immune defenses.
  • * Specific QS components directly influence inflammatory responses and immune cell function.

Conclusions:

  • * Pseudomonas aeruginosa quorum sensing is a critical factor in its pathogenicity.
  • * Targeting QS systems presents a potential strategy to combat P. aeruginosa infections.
  • * Further research is needed to fully understand the complex interactions between QS and host immunity.
Keywords:
3O-C12-HSLC4-HSLImmune systemPseudomonas aeruginosaQuorum sensing

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