Cyclosporine Dose Adjustment According to Calcineurin Activity After Allogeneic Hematopoietic Stem-cell Transplantation (CALCICLO)

Cyclosporine Dose Adjustment According to Calcineurin Activity After Allogeneic Hematopoietic Stem-cell Transplantation

Reduction of Acute and Chronic Graft-versus-host Disease After Allogeneic Hematopoietic Stem-cell Transplantation by Adapting Cyclosporine Doses According to Calcineurin Activity : a Proof-of-concept Trial

The purpose of this trial is to assess whether an adaptation of cyclosporine (CsA) dose according to a longitudinal calcineurin (CN) activity monitoring would prevent the onset of graft-versus-host disease (GVHD).

Our previous studies established a correlation between increased calcineurin (CN) activity and the risk of developing severe acute GVHD in allogeneic stem cell transplant recipients receiving immunosuppressive therapy with calcineurin inhibitors. This proof-of-concept trial is aiming at evaluating CALCIneurin activity as a monitoring biomarker of efficacy of cyCLOsporine - (CALCICLO) - for the prophylaxis of acute GVHD. Our aim is to assess whether a longitudinal monitoring of CN activity would permit to adapt and optimize the dose of CsA that would prevent the onset of severe acute GVHD, yet still maintaining an acceptable tolerability profile.

The protocol of the CALCICLO trial consisted in a CsA dose adaptation during the first 100 days following transplantation. This dose adaptation was performed according to both residual CsA blood and CN activity levels only if the safety of vital functions - especially renal, liver, and neurological - was preserved as assessed by clinical evaluations and laboratory analyses such as creatinine clearance higher than 40 ml/min, serum bilirubin lower than 40 µM and absence of neurological signs. According to the protocol, CsA blood levels and CN activity were measured concomitantly at least once a week from day 0 to day 15, twice a week from day 16 to day 35 and then once a week until day 100.

Safety was a secondary endpoint. It was assessed through clinical assessments including vital signs, creatinine clearance, the presence or not of neurological signs evocative of, or consistent with CsA toxicity, creatinine clearance and serum bilirubin.

Inclusion Criteria: Patients were between the age of 12 and 60 years Patients planned to receive an allogeneic HSCT following a myeloablative conditioning regimen Exclusion Criteria: Transplant from a syngeneic donor Evidence of refractory disease Nonmyeloablative conditioning Any participation to a study with a new investigational drug within the previous 3 months

Sanquer S, Schwarzinger M, Maury S, Yakouben K, Rafi H, Pautas C, Kuentz M, Barouki R, Cordonnier C. Calcineurin activity as a functional index of immunosuppression after allogeneic stem-cell transplantation. Transplantation. 2004 Mar 27;77(6):854-8. doi: 10.1097/01.tp.0000114612.55925.22.