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Related Experiment Videos

Type III secretion systems and disease.

Bryan Coburn1, Inna Sekirov, B Brett Finlay

  • 1Michael Smith Laboratories, UBC, 301-2185 East Mall, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4. bfinlay@interchange.ubc.ca

Clinical Microbiology Reviews
|October 16, 2007
PubMed
Summary
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Type III secretion systems (T3SSs) are bacterial virulence factors that inject toxins into host cells. Understanding T3SS mechanisms is crucial for developing new therapies against bacterial infections.

Area of Science:

  • Microbiology
  • Pathogenesis
  • Bacterial Virulence Factors

Background:

  • Type III secretion systems (T3SSs) are sophisticated virulence mechanisms employed by Gram-negative pathogens.
  • These systems enable direct injection of bacterial effector proteins into host cell cytoplasm.

Purpose of the Study:

  • To elucidate the common pathogenic mechanisms mediated by T3SSs across different bacterial species.
  • To highlight the clinical relevance of T3SS activity in infection progression and outcomes.
  • To emphasize the importance of targeting T3SSs for therapeutic and prophylactic strategies.

Main Methods:

  • The study synthesizes existing knowledge on T3SS structure and function.
  • It analyzes common effector protein functions and their impact on host cells.

Related Experiment Videos

  • Correlation between T3SS activity and clinical outcomes in infection models is examined.

    • Main Results:

    • T3SSs facilitate bacterial invasion by manipulating host cytoskeleton.
    • They disrupt cellular trafficking, cause cytotoxicity, and impair barrier function.
    • T3SSs are key effectors in subverting host immune responses.

    Conclusions:

    • T3SS-mediated virulence is a conserved mechanism across various pathogens.
    • The direct correlation between T3SS activity and infection severity underscores their pathogenic importance.
    • Targeting T3SSs represents a promising strategy for novel anti-infective therapies.