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Related Experiment Videos

Positive effect on T-cell regulatory apoptosis by mycophenolate mofetil.

M Nakamura1, N Ogawa, A Shalabi

  • 1The Johns Hopkins Medical Institutions, and the Laboratory of Immunology, National Institute on Aging, National Institutes of Health, Baltimore, MD 21287-8611, USA.

Clinical Transplantation
|March 21, 2002
PubMed
Summary

Mycophenolate mofetil (MMF) increases T cell apoptosis, while cyclosporine (CSA) decreases it. This suggests MMF could be a beneficial addition to CSA therapy for managing T cell regulatory apoptosis.

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Area of Science:

  • Immunology
  • Pharmacology

Background:

  • T cell apoptosis, or activation-induced cell death (AICD), is crucial for immune regulation.
  • Immunosuppressive agents can interfere with AICD, potentially impacting therapeutic outcomes.

Purpose of the Study:

  • To compare the effects of mycophenolate mofetil (MMF) and cyclosporine (CSA) on T cell apoptosis.
  • To investigate the differential impact of MMF and CSA on T cell activation pathways and FasL expression.

Main Methods:

  • Peripheral blood leukocytes (PBL) were stimulated with Staph enterotoxin B (SEB) or anti-CD3/anti-CD28.
  • Cell proliferation was assessed using CFSE staining.
  • Apoptosis and FasL expression were measured by flow cytometry following treatment with MMF or CSA.

Main Results:

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  • CSA reduced apoptosis, particularly with calcineurin-dependent stimulation.
  • MMF increased apoptosis with SEB stimulation and showed a less pronounced effect with anti-CD3/anti-CD28.
  • CSA decreased FasL expression, whereas MMF increased it, suggesting distinct mechanisms of action.

Conclusions:

  • MMF enhances T cell regulatory apoptosis, contrasting with CSA's inhibitory effect.
  • MMF may serve as a valuable adjunct to calcineurin inhibitor therapy due to its opposing effects on T cell apoptosis.