Steroid-sparing maintenance immunosuppression is safe and effective after simultaneous liver kidney transplantation.
2020
Optimization of maintenance immunosuppression (mIS) regimens in the transplant recipient requires a balance between sufficient potency to prevent rejection and avoidance of excessive immunosuppression to prevent toxicities and complications. The optimal regimen after simultaneous liver-kidney (SLK) transplantation remains unclear, but small single-center reports have shown success with steroid-sparing regimens. We studied 4184 adult SLK recipients using the Scientific Registry of Transplant Recipients, from 3/1/2002-2/28/2017, on tacrolimus-based regimens at one year post-transplant. We determined the association between mIS regimen and mortality and graft failure using Cox proportional hazard models. The use of steroid-sparing regimens increased post-transplant, from 16.1% at discharge to 88.0% at five years. Using multi-level logistic regression modeling, we found center-level variation to be the major contributor to choice of mIS regimen (ICC 44.5%; 95% CI: 36.2%-53.0%). In multivariate analysis, use of a steroid-sparing regimen at one year was associated with a 21% decreased risk of mortality compared to steroid-containing regimens (aHR 0.79, p=0.01) and 20% decreased risk of liver graft failure (aHR 0.80, p=0.01), without differences in kidney graft loss risk (aHR 0.92, p=0.6). Among SLK recipients, the use of a steroid-sparing regimen appears to be safe and effective without adverse effects on patient or graft survival.
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