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Related Experiment Videos

T-lymphocyte coactivator molecules.

L I Salazar-Fontana1, B E Bierer

  • 1Laboratory of Lymphocyte Biology, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892, USA.

Current Opinion in Hematology
|January 4, 2001
PubMed
Summary
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T-cell activation relies on the T-cell receptor (TCR) and costimulatory molecules like CD28 within the immunologic synapse. Novel costimulatory receptors influence T-cell differentiation, activation, and effector functions, impacting B-cell responses.

Area of Science:

  • Immunology
  • Cellular Biology
  • Molecular Biology

Background:

  • T-cell recognition and activation occur at the immunologic synapse, a specialized contact area enriched in glycolipid membrane microdomains.
  • T-cell activation requires specific peptide-antigen recognition via the T-cell receptor (TCR) and engagement with major histocompatibility complex (MHC) molecules.
  • TCR engagement alone can lead to T-cell unresponsiveness, but coreceptor CD28 ligation prevents this, highlighting the importance of costimulatory signals.

Purpose of the Study:

  • To investigate the role of novel costimulatory molecules in T-cell activation and differentiation.
  • To understand how these receptors influence T-cell effector functions and B-cell responses.

Main Methods:

  • The study involved the identification and characterization of novel costimulatory molecules.

Related Experiment Videos

  • Analysis of their roles in T-cell differentiation and activation pathways.
  • Assessment of their impact on T-cell effector functions and B-cell differentiation and function.

    • Main Results:

    • Novel costimulatory molecules from the CD28 and TNF/TNFR superfamilies have been identified.
    • These receptors modulate T-cell activation at various differentiation stages.
    • They play significant roles in promoting distinct T-cell effector functions and are crucial for B-cell differentiation and function.

    Conclusions:

    • Costimulatory receptors are critical regulators of T-cell activation, differentiation, and function.
    • Novel costimulatory molecules expand our understanding of immune responses.
    • These findings have implications for immune modulation and therapeutic strategies.