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T cell independent antigens

J J Mond1, Q Vos, A Lees

  • 1Department of Medicine, Uniformed Services University of Health Sciences, Bethesda, MD 20814-4799, USA.

Current Opinion in Immunology
|June 1, 1995
PubMed
Summary

Natural killer cells and their lymphokines, such as interferon-gamma, help B cells produce antibodies against T cell independent antigens type 2 (TI-2) without T-cell assistance. This involves synergistic stimulation for immunoglobulin secretion, highlighting NK cells

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Area of Science:

  • Immunology
  • Cell Biology

Background:

  • T cell independent antigens type 2 (TI-2), primarily polysaccharides, induce antibody production without T-cell help.
  • Natural killer (NK) cells and their derived lymphokines may provide essential 'help' for TI-2 responses.

Purpose of the Study:

  • To investigate the role of NK cells and their lymphokines in T cell independent antigen type 2 (TI-2) responses.
  • To explore the synergistic effects of NK cell-derived lymphokines on B cell activation.

Main Methods:

  • Stimulation of B cells with a multivalent ligand mimicking TI-2 antigens.
  • Assessment of immunoglobulin (Ig) secretion in response to NK cell-derived lymphokines.
  • Review of NK cell receptor interactions with polysaccharides.

Main Results:

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  • Interferon-gamma and granulocyte-macrophage colony-stimulating factor (GM-CSF) from NK cells synergistically stimulate Ig secretion in B cells.
  • NK cells possess receptors for polysaccharides, supporting their regulatory role in TI-2 responses.

Conclusions:

  • NK cells and their lymphokines play a crucial role in mediating humoral immune responses to TI-2 antigens.
  • The synergistic action of interferon-gamma and GM-CSF is vital for B cell activation and antibody production in this context.