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Related Experiment Videos

Parallels in T lymphocyte development between lpr and normal mice

R C Budd1, N Van Houten, J Clements

  • 1Department of Medicine, University of Vermont College of Medicine, Burlington 05405.

Seminars in Immunology
|February 1, 1994
PubMed
Summary
This summary is machine-generated.

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The lpr mutation reveals critical insights into T lymphocyte development by identifying parallel cell populations. This research illuminates normal T cell development and function through the study of abnormal T cell subsets.

Area of Science:

  • Immunology
  • Cell Biology
  • Developmental Biology

Background:

  • The lpr mutation in T cells presents an unusual phenotype and function.
  • Studying these abnormal T cell subsets has helped identify stages in normal T lymphocyte development.
  • This includes the characterization of memory T cells expressing high CD44 levels.

Purpose of the Study:

  • To elucidate normal T cell development and function by analyzing lpr T cell subsets.
  • To identify parallel populations within normal T lymphocyte development.
  • To understand the characteristics of T cells involved in immune responses.

Main Methods:

  • Comparative analysis of T cell subsets in lpr mice and normal mice.
  • Flow cytometry to identify cell surface markers (CD44, TCR-alpha beta, CD2).

Related Experiment Videos

  • Assessment of cytokine production and proliferative capacity.

    • Main Results:

    • Lpr mature T cells (CD4+, CD8+) are CD44hi and produce high cytokine levels, unlike normal peripheral T cells.
    • A minor CD44hi subset of normal memory T cells mirrors this high cytokine production.
    • Lpr CD4-8- T cells, lacking CD2 expression, are unresponsive, paralleling CD2- subsets in normal mice.

    Conclusions:

    • The developmental block in lpr CD4-8- T cells provides significant insights into normal T cell development.
    • Lpr CD4-8- T cells share characteristics with anergic T cells, including high p59fyn and lack of IL-2 production.
    • T cell proliferation capacity correlates with CD2 expression in normal thymocytes and lymphocytes.