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Related Experiment Videos

OX-40: life beyond the effector T cell stage

A D Weinberg1, A T Vella, M Croft

  • 1Earle A. Chiles Research Institute, Robert W. Franz Cancer Research Center, 4805 NE Glisan, Providence Portland Medical Center, Portland, OR, 97213, USA.

Seminars in Immunology
|November 25, 1998
PubMed
Summary

The OX-40 receptor (OX-40R) provides a potent costimulatory signal to T cells, enhancing their function and survival. Manipulating OX-40R can either suppress autoimmune responses or boost anti-tumor immunity.

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Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Medicine

Background:

  • The OX-40 receptor (OX-40R) is a costimulatory molecule on activated CD4(+) T cells.
  • OX-40R engagement mimics CD28 costimulation, enhancing T cell function and lifespan.

Purpose of the Study:

  • To investigate the role of OX-40R in T cell survival and its therapeutic potential in autoimmune diseases and cancer.
  • To determine if OX-40R signaling inhibits activation-induced T cell death (AICD).

Main Methods:

  • Utilized experimental autoimmune encephalomyelitis (EAE) model to study OX-40R+ T cells in the central nervous system (CNS).
  • Sorted and analyzed autoantigen-specific OX-40R+ T cells from EAE CNS.
  • Investigated in vivo costimulation via OX-40R in cancer models.

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Main Results:

  • OX-40R+ T cells in EAE CNS were autoantigen-specific.
  • Targeting OX-40R in EAE aimed to eliminate autoreactive T cells.
  • In vivo OX-40R costimulation in cancer models enhanced anti-tumor immunity and survival.

Conclusions:

  • OX-40R manipulation can differentially modulate CD4(+) T cell responses.
  • Targeting OX-40R offers a strategy to control T cell activation and survival in inflammatory and malignant conditions.