Ciclosporin A tapering monitored by NFAT-regulated gene expression: a new concept of individual immunosuppression

Transplantation
Claudia SommererMartin Zeier

Abstract

The impact of long-term immunosuppression in renal transplant recipients with respect to safety and efficacy remains undetermined. Pharmacodynamic monitoring of the relative reduction of T-cell-specific gene expression in renal transplant recipients treated with cyclosporine A (CsA) was applied in this study. During the study, 20 stable renal transplant recipients with tapered CsA dose and 20 patients with stable CsA dose (matched for age, gender, CsA dose, time after transplantation) were compared for a median period of 18 months (range 6-44). CsA dose was tapered in two stages of 15% each, and the expression of the nuclear factor of activated T cells (NFAT)-regulated genes was determined by reverse-transcription polymerase chain reaction method at CsA trough level and 2 hr after oral uptake. The initial residual gene expression at 2 hr after CsA intake increased from 6.31% (range 1.30-16.6) to 21.3% (range 6.58-31.8) in patients with CsA dosage reduction. In one patient, the residual gene expression increased more than 40% and resulted in a reversible Banff 1A rejection episode. Blood pressure was significantly lower after CsA dosage reduction (P<0.05). In the pair-matched control group NFAT-regulated gene expression was comp...Continue Reading

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Citations

Oct 10, 2008·Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association·Claudia SommererMartin Zeier
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