Campath, calcineurin inhibitor reduction, and chronic allograft nephropathy (the 3C Study) - results of a randomized controlled clinical trial

3C Study Collaborative Group, Richard Haynes, Lisa Blackwell, Natalie Staplin, William G Herrington, Jonathan Emberson, Parminder K Judge, Benjamin C Storey, Martin J Landray, Paul N Harden, Colin Baigent, Peter Friend, 3C Study Collaborative Group, Richard Haynes, Lisa Blackwell, Natalie Staplin, William G Herrington, Jonathan Emberson, Parminder K Judge, Benjamin C Storey, Martin J Landray, Paul N Harden, Colin Baigent, Peter Friend

Abstract

Calcineurin inhibitors (CNIs, eg, tacrolimus) reduce short-term kidney transplant failure, but chronic nephrotoxicity may contribute to late transplant loss. Elective conversion to inhibitors of the mammalian target of rapamycin (mTOR, eg, sirolimus) pathway might avoid long-term CNI renal damage and improve outcomes. The 3C Study was a pragmatic randomized controlled trial of sequential randomizations between alemtuzumab and basiliximab induction therapy (at the time of surgery) and between tacrolimus and sirolimus maintenance therapy at 6 months posttransplantation. The primary outcome of this analysis was estimated glomerular filtration rate (eGFR) at 18 months after maintenance therapy randomization; 197 patients were assigned sirolimus-based and 197 to tacrolimus-based therapy. Allocation to sirolimus had no significant effect on eGFR at 18 months: baseline-adjusted mean (SEM) eGFR was 53.7 (0.9) mL/min/1.73 m2 in the sirolimus group versus 54.6 (0.9) mL/min/1.73 m2 in the tacrolimus group (P = .50). Biopsy-proven acute rejection (29 [14.7%]) vs 6 [3.0%]; P < .001) and serious infections (defined as opportunistic infections or those requiring hospitalization; 95 [48.2%] vs 70 [35.5%]; P = .008) were more common among participants allocated sirolimus. Compared with tacrolimus-based therapy, sirolimus-based maintenance therapy did not improve transplant function at 18 months after conversion and was associated with significant hazards of rejection and infection. ClinicalTrials.gov identifier NCT01120028 and ISRCTN88894088.

Keywords: clinical research/practice; immunosuppressant - calcineurin inhibitor (CNI); immunosuppressant - fusion proteins and monoclonal antibodies: alemtuzumab; immunosuppressant - fusion proteins and monoclonal antibodies: basiliximab/daclizumab; immunosuppressant - mechanistic target of rapamycin (mTOR); immunosuppression/immune modulation; kidney transplantation/nephrology.

© 2017 The Authors. American Journal of Transplantation published by Wiley Periodicals, Inc. on behalf of The American Society of Transplantation and the American Society of Transplant Surgeons.

Figures

Figure 1
Figure 1
Trial profile
Figure 2
Figure 2
Effect of allocation to sirolimus‐based maintenance therapy on transplant function within the first 18 months
Figure 3
Figure 3
Life‐table plot of the effect of allocation to sirolimus‐based maintenance therapy on any biopsy‐proven rejection

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Source: PubMed

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