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Related Experiment Videos

Experimental hypersensitivity pneumonitis: cellular requirements

M Schuyler1, K Gott, B Edwards

  • 1Department of Medicine, Albuquerque VA Medical Centre, NM 87108, USA.

Clinical and Experimental Immunology
|July 1, 1996
PubMed
Summary
This summary is machine-generated.

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Thy1.2+, CD4+, and Ia+ T cells are crucial for adoptive experimental hypersensitivity pneumonitis (EHP) transfer. Depleting these specific T cells prevents EHP development, highlighting their essential role in the immune response.

Area of Science:

  • Immunology
  • Cellular Immunology
  • Pulmonary Immunology

Background:

  • Experimental hypersensitivity pneumonitis (EHP) is an inflammatory lung disease.
  • Previous studies identified Thy1.2+, CD4+, Ia-T cells as mediators of adoptive EHP transfer.

Purpose of the Study:

  • To determine the specific cell populations required for the development of EHP-transferable cells in culture.
  • To elucidate the role of Thy1.2+, CD4+, CD8+, and Ia+ cells in the initial stages of EHP induction.

Main Methods:

  • Sensitized murine spleen cells (SC) were depleted of specific cell populations (Thy1.2+, CD4+, CD8+, Ia+) using monoclonal antibodies (MoAbs) and complement or magnetic beads.
  • Depleted SC were cultured with Micropolyspora faeni.
  • Cultured cells were transferred to naive recipients, followed by intratracheal challenge with M. faeni.

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  • Pulmonary inflammatory changes were assessed 4 days post-challenge.

    • Main Results:

    • SC depleted of Thy1.2+ or CD4+ T cells could not transfer EHP.
    • SC depleted of CD8+ T cells or treated with control reagents could still transfer EHP.
    • Depletion of Ia+ cells partially reduced the ability to transfer EHP.

    Conclusions:

    • The development of cells capable of adoptively transferring EHP requires the presence of Thy1.2+, CD4+, and Ia+ cells at the start of culture.
    • CD8+ T cells are not essential for the development of EHP-transferable cells.