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Related Experiment Videos

Gut feelings: enteropathogenic E. coli (EPEC) interactions with the host.

D L Goosney1, S Gruenheid, B B Finlay

  • 1The Biotechnology Laboratory and the Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, Canada.

Annual Review of Cell and Developmental Biology
|October 14, 2000
PubMed
Summary
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Enteropathogenic Escherichia coli (EPEC) uses a molecular syringe to inject Tir, a protein that anchors bacteria to host cells and causes diarrhea. This review details EPEC pathogenesis and pedestal formation.

Area of Science:

  • Microbiology
  • Cell Biology
  • Pathogenesis

Background:

  • Enteropathogenic Escherichia coli (EPEC) is a gram-negative bacterium causing persistent diarrhea.
  • EPEC adheres to intestinal epithelial cells, subverting host cytoskeleton to form pedestals.
  • Unlike intracellular pathogens, EPEC remains extracellular, utilizing a type III secretion system.

Purpose of the Study:

  • To review recent advancements in understanding EPEC pathogenesis.
  • To elucidate the mechanisms of EPEC adherence and pedestal formation.
  • To compare EPEC pedestals with host cell structures like focal contacts and Listeria actin tails.

Main Methods:

  • Review of existing literature on EPEC.
  • Analysis of molecular mechanisms of bacterial-host cell interactions.

Related Experiment Videos

  • Comparative analysis of cytoskeletal rearrangements.

    • Main Results:

    • EPEC injects the Tir protein via a type III secretion system, which acts as a host cell receptor.
    • Tir anchors EPEC to the host actin cytoskeleton, initiating pedestal formation.
    • EPEC triggers signaling pathways leading to tight junction disruption, altered ion secretion, and immune responses.

    Conclusions:

    • EPEC pathogenesis involves sophisticated manipulation of host cell processes.
    • Understanding EPEC's extracellular strategy provides insights into host-pathogen interactions.
    • Comparative analysis highlights unique and shared mechanisms in actin-based motility and adhesion.