Abstract
Background
There is little information about very long-term outcomes of kidney allograft recipients exposed to calcineurin inhibitors.
Methods
In this single-centre retrospective study with 20-year follow-up, we analyzed data from 644 patients who underwent primary renal transplantation between 1983 and 1993. Participants were treated with a cyclosporine-based immunosuppressive scheme and had allograft function at 1 year.
Results
After 20 years, 15.2% patients died, 39.7% experienced allograft loss, 26.8% were alive with a functioning transplant, and 18.2% were lost to follow-up. Cardiovascular disease (30.8%), malignancy (26.6%) and infection (17.0%) were the main causes of death. Age, new-onset proteinuria > 1 g/day, major acute cardiovascular event (MACE), and malignancy were independent predictors of mortality at time-dependent multivariate analysis. Chronic rejection (63.3%), recurrent glomerulonephritis (14.0%), and nonspecific interstitial fibrosis/tubular atrophy (13.2%) were the leading cause of allograft loss. Basal disease, hepatitis C, difference between 1 year and nadir serum creatinine, new-onset proteinuria > 1 g/day, and MACE were independent predictors of transplant failure. Among patients with 20-year allograft function, we recorded the following complications: hypertension (85%), malignancy (13%), diabetes (9%), and cardiovascular disease (9%). Median serum creatinine and proteinuria were 1.4 mg/dL and 0.6 g/day, respectively.
Conclusions
Prolonged use of cyclosporine may expose to several dose-related adverse events and may contribute to the development of allograft dysfunction but it does not necessarily cause relentless, progressive transplant failure if patients are carefully and consistently monitored during the follow-up.
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All the procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional committee at which the studies were conducted and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. At the time the study was designed, it was formally discussed in our regular Multidisciplinary Research Meeting at the Ospedale Maggiore Policlinico (Milan, Italy) and the consensus was that IRB approval was not necessary because it was retrospective and non-interventional. Therefore, nor specific IRB approval number nor specific written documents regarding the present study are actually available. All transplant recipients followed up at our institution are consented for both treatment and research purposes at the time of activation on the transplant waiting list as per local and national regulatory requirements. As a consequence, all subjects enrolled into the study were already aware that their anonymized data including viral status and other biomedical parameters would have been used for planning and/or research.
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Moroni, G., Binda, V., Quaglini, S. et al. Causes of late transplant failure in cyclosporine-treated kidney allograft recipients. Clin Exp Nephrol 23, 1076–1086 (2019). https://doi.org/10.1007/s10157-019-01740-7
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DOI: https://doi.org/10.1007/s10157-019-01740-7