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Signaling through OX40 (CD134) breaks peripheral T-cell tolerance.
P Bansal-Pakala1, A G Jember, M Croft
1Division of Immunochemistry, La Jolla Institute for Allergy and Immunology, San Diego, California, USA.
Nature Medicine
|August 2, 2001
Summary
Peripheral T-cell tolerance, a barrier in cancer, can be reversed. A single dose of an agonistic antibody targeting OX40 (CD134) restores CD4+ T-cell function and expansion, offering a therapeutic target.
Area of Science:
- Immunology
- Oncology
Background:
- Peripheral T-cell tolerance limits autoimmunity but hinders cancer treatment.
- Established tolerance involves suppressed T-cell accumulation and function.
- Reversing established T-cell tolerance remains a significant challenge.
Purpose of the Study:
- To investigate if established T-cell tolerance can be reversed.
- To identify potential therapeutic targets for breaking T-cell tolerance.
Main Methods:
- Utilized an agonistic antibody targeting OX40 (CD134).
- Administered a single dose of the antibody to break established tolerance.
- Assessed CD4+ T-cell compartment for expansion and functionality.
Main Results:
- A single dose of anti-OX40 antibody successfully broke established T-cell tolerance.
- OX40 signaling promoted T-cell expansion even after hypo-responsiveness was induced.
- Normal T-cell functionality was restored in the CD4+ compartment.
Conclusions:
- OX40 (CD134) possesses potent costimulatory capacity.
- Targeting OX40 is a promising strategy for therapeutic intervention in diseases involving T-cell tolerance.
- Reversing established tolerance is achievable, opening new avenues for cancer immunotherapy.
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