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Related Experiment Videos

T-cell responses to enteric antigens

S D Hurst1, T A Barrett

  • 1Department of Medicine, Veterans Administration Lakeside Medical Research Center, Chicago, IL, USA.

Seminars in Gastrointestinal Disease
|July 1, 1996
PubMed
Summary
This summary is machine-generated.

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Antigen-specific T cells in the intestine are primed for effector functions. Their activation leads to distinct subsets trafficking to mucosal tissues, influencing oral immune responses and vaccination strategies.

Area of Science:

  • Immunology
  • Gastroenterology
  • Cellular Biology

Background:

  • Intestinal antigens trigger local and systemic immune responses via poorly understood mechanisms.
  • The lamina propria is an immunologically active site, stimulating T cells against luminal antigens.
  • Antigen-presenting cells in the lamina propria, like macrophages and dendritic cells, are key players.

Purpose of the Study:

  • To investigate the immune responses of distinct CD4+ T cell populations to enteric antigens.
  • To understand the mechanisms of T cell activation, trafficking, and effector functions in the gut.
  • To explore the potential for developing improved oral vaccination strategies.

Main Methods:

  • Utilized a T-cell receptor (TCR) transgenic system to study CD4+ T cell responses.

Related Experiment Videos

  • Employed anti-TCR monoclonal antibody to track activated transgenic T cells.
  • Analyzed T cell populations in lymphoid tissues, Peyer's patches, and lamina propria.

    • Main Results:

    • Intestinal lamina propria T cells are a unique, pre-activated population with broad effector functions.
    • Antigen-specific T cell activation in the periphery directs distinct subsets to mucosal compartments.
    • Surface molecules like selectins and integrins are implicated in T cell trafficking to the gut.

    Conclusions:

    • Mucosal and systemic immune responses to oral antigens depend on the activation state and phenotype of responding T cell subsets.
    • Understanding these T cell dynamics could lead to more effective oral vaccination regimens.
    • Further research into T cell trafficking and function is crucial for mucosal immunology.