Related Experiment Video
Updated: Jul 5, 2026
08:08
Isolation and Activation of Murine Lymphocytes
Published on: October 30, 2016
Lymphocyte activation and correlation with IMPDH activity under therapy with mycophenolate mofetil
Elena Devyatko1, Daniela Dunkler, Arthur Bohdjalian
1Department of General Surgery and Transplantation, University Clinic of Surgery, Medical University Vienna, Vienna, Austria. yelena.devyatko@meduniwien.ac.at
Summary
Mycophenolate mofetil (MMF) therapy in heart transplant patients showed reduced inosine monophosphate dehydrogenase (IMPDH) activity, correlating with changes in lymphocyte activation markers. This suggests an immunomodulatory rather than immunosuppressive effect.
Area of Science:
- Immunology
- Pharmacology
- Transplantation Medicine
Background:
- Monitoring the pharmacodynamics of mycophenolate mofetil (MMF) is crucial in cardiac transplant recipients.
- Investigating the link between inosine monophosphate dehydrogenase (IMPDH) activity and lymphocyte activation markers provides insight into MMF's effects.
Purpose of the Study:
- To assess the association between IMPDH activity in peripheral blood mononuclear cells and lymphocyte activation markers.
- To understand the pharmacodynamic effects of MMF in stable cardiac transplant patients.
Main Methods:
- Twenty-four stable cardiac transplant recipients were switched from azathioprine to MMF.
- IMPDH activity and lymphocyte activation markers (CD4+/25+, CD8+/38+, CD19+/69+, CD3+/16+/56+, NK cells, monocytes) were measured over 12 months.
Main Results:
- IMPDH activity significantly declined post-MMF initiation, with near-complete inhibition at six months.
- Significant changes were observed in various activated lymphocyte subsets.
- IMPDH activity correlated positively with CD8+/38+ T cells and inversely with NK cells and CD19+/69+ cells.
Conclusions:
- A strong association exists between baseline IMPDH activity and lymphocyte activation markers in MMF-treated heart transplant patients.
- MMF appears to exert an immunomodulatory effect, distinct from pure immunosuppression.
