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Related Experiment Videos

Calcium signalling during cell interactions with bacterial pathogens.

Guy TranVan Nhieu1, Caroline Clair, Gianfranco Grompone

  • 1Unité de Pathogénie Microbienne Moléculaire, INSERM U389, Institut Pasteur, 75724 Paris Cedex 15, France. gtranvan@pasteur.fr

Biology of the Cell
|April 20, 2004
PubMed
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Bacterial pathogens manipulate host calcium (Ca2+) signaling to colonize tissues, invade cells, and evade immune responses. Understanding these Ca2+ dependent mechanisms is crucial for developing new anti-bacterial therapies.

Area of Science:

  • Microbiology
  • Cell Biology
  • Immunology

Background:

  • Pathogenic microorganisms require specific virulence factors to colonize hosts and cause disease.
  • Bacterial infections can lead to host cell damage through toxins or direct invasion.
  • Calcium ion (Ca2+) signaling plays a critical role in various host-pathogen interactions.

Purpose of the Study:

  • To elucidate the multifaceted roles of calcium (Ca2+) signaling in bacterial pathogenesis.
  • To investigate how bacteria exploit host Ca2+ pathways for adhesion, invasion, and immune evasion.

Main Methods:

  • Analysis of bacterial virulence factors affecting host cell calcium.
  • Investigation of Ca2+ dependent cytoskeletal rearrangements during bacterial invasion.
  • Study of pathogen manipulation of phagocyte Ca2+ signaling.

Related Experiment Videos

Main Results:

  • Bacterial toxins induce host cytosolic Ca2+ increases, promoting inflammation and epithelial damage.
  • Bacteria trigger Ca2+ responses for cell binding and internalization.
  • Pathogens can hijack Ca2+-dependent processes to evade immune cells and persist intracellularly.
  • Bacterial induction of ATP release further modulates host Ca2+ signaling for enhanced colonization.

Conclusions:

  • Calcium signaling is a central mechanism exploited by diverse bacterial pathogens.
  • Targeting bacterial manipulation of Ca2+ pathways offers potential therapeutic strategies.
  • Understanding Ca2+ dynamics is key to combating bacterial infections and their sequelae.