OX40 drives protective vaccinia virus-specific CD8 T cells
Shahram Salek-Ardakani1, Magdalini Moutaftsi, Shane Crotty
1Division of Molecular Immunology, La JollaInstitute for Allergy and Immunology, San Diego, CA 92037, USA.
Journal of Immunology (Baltimore, Md. : 1950)
|November 20, 2008
Summary
The costimulatory molecule OX40 (CD134) is crucial for controlling vaccinia virus (VACV)-specific CD8 T cell responses and developing robust memory. This highlights OX40
Area of Science:
- Immunology
- Virology
- T cell biology
Background:
- Vaccinia virus (VACV) provides protection against smallpox.
- CD8 T cells are vital for VACV immunity, but their regulation is unclear.
Purpose of the Study:
- To investigate the role of OX40 (CD134) in regulating CD8 T cell responses during VACV infection.
Main Methods:
- Utilized OX40-deficient CD8 T cell adoptive transfer models.
- Analyzed T cell expansion, cytokine production, and memory development post-VACV challenge.
Main Results:
- OX40 controls primary VACV-specific CD8 T cell expansion and antiviral cytokine production.
- OX40 dictates the development of strong memory CD8 T cells against VACV.
- CD8 T cells essential for protection against lethal VACV challenge require OX40.
Conclusions:
- OX40 plays a dominant role in shaping CD8 T cell responses to VACV, unlike other viral models.
- Suggests plasticity in immune responses, utilizing distinct costimulatory pathways for antiviral defense.
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