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Master manipulators: an update on Legionella pneumophila Icm/Dot translocated substrates and their host targets

Dervla T Isaac1, Ralph Isberg

  • 1Department of Microbiology & Molecular Biology, Tufts University School of Medicine, 150 Harrison Avenue, Boston, MA 02111, USA.

Future Microbiology
|April 26, 2014
PubMed

Insights

Legionella pneumophila evades immune cells using specialized proteins called effectors. Understanding these bacterial effectors is key to combating Legionnaires

Area of Science:

  • Microbiology and Immunology
  • Bacterial Pathogenesis
  • Cell Biology

Background:

  • Macrophages are crucial immune cells that defend against microbial invaders.
  • Pathogenic bacteria like Legionella pneumophila possess mechanisms to evade host immune responses and survive intracellularly.
  • Legionella pneumophila causes Legionnaires' disease, a severe pneumonia.

Purpose of the Study:

  • To review recent advancements in understanding how Legionella pneumophila effectors interact with host cells.
  • To elucidate the molecular mechanisms employed by bacterial effectors during host-pathogen interactions.

Main Methods:

  • Characterization of the molecular activities of Legionella pneumophila effector proteins.
  • Analysis of the Icm/Dot type IV secretion system's role in virulence.
  • Investigation of vacuolar compartment biogenesis and intracellular replication niche establishment.

Main Results:

  • Legionella pneumophila utilizes approximately 300 translocated effector proteins.
  • These effectors facilitate host cell entry, vacuolar compartment manipulation, and intracellular replication.
  • Recent research has shed light on the specific functions of these effectors in mediating host-pathogen interactions.

Conclusions:

  • Legionella pneumophila employs a sophisticated arsenal of effector proteins to subvert host immunity.
  • Continued research into these effectors is vital for understanding Legionnaires' disease pathogenesis.
  • Elucidating effector functions offers potential targets for therapeutic intervention.

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