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Updated: Jun 23, 2026

Quantification of the Immunosuppressant Tacrolimus on Dried Blood Spots Using LC-MS/MS
Published on: November 8, 2015
Protocol conversion from a calcineurin inhibitor based therapy to sirolimus
1Department of Nephrology, KH Elisabethinen, Linz and Medical University of Vienna and Austrian Dialysis and Transplant Registry, Vienna, Austria. rainer.oberbauer@meduniwien.ac.at
Abstract:
Small late-conversion studies found an impressive glomerular filtration rate (GFR) increase 1 year after conversion from calcineurin inhibitor (CNI) to sirolimus (SRL). This effect could not be detected in the considerably larger CONVERT study, which found a lower rate of malignancies in the SRL group. In the spare the nephron trial patients converted to SRL exhibited a mean measured GFR of 68 mL/min at 1 year compared with 60 mL/min from CNI patients (P<0.05). Accordingly, the CONCEPT study which randomized patients to SRL conversion 3 months after transplantation reported a significant higher GFR in the SRL patients at 1 year. These trials showed that conversion of stable renal transplant recipients from CNI to SRL is safe.
