Calcineurin inhibitor withdrawal and conversion to mycophenolate mofetil and steroids in cardiac transplant recipients with chronic renal failure: a word of caution.

Abstract:

BACKGROUND:Chronic renal failure (CRF) is a common complication of calcineurin inhibitor (CNI)-based immunosuppression following cardiac transplantation (HTx). The aim of this prospective study was to evaluate the impact of an immunosuppressive conversion from CNIs to mycophenolate mofetil (MMF) and steroids in cardiac transplant recipients with CRF on renal and cardiac graft function. METHODS:Since 1999, 12 HTx recipients (10 men; 58 +/- 3.6 yr of age; 8.7 +/- 4.2 yr after HTx) with CNI-based immunosuppression and a calculated creatinine clearance (CreaCl) <50 mL/min were included. Most patients (10/12) were on cyclosporine and two patients were on tacrolimus prior inclusion. MMF was started with 0.5 g/d and adjusted according to the target trough levels (2-4 ng/mL). Prednisone dosage was 0.4 mg/kg. Subsequently, CNIs were completely withdrawn. Acute rejection episodes were excluded one and three months after conversion by endomyocardial biopsy and by echocardiography every three months thereafter. RESULTS:After a mean follow-up of 20 +/- 16 months, CreaCl improved significantly: pre-conversion vs. post-conversion: 32.8 +/- 12.2 mg/dL vs. 42.8 +/- 21.14 mg/dL, p = 0.03. However, four acute rejection episodes occurred and patients were reconverted to CNIs. Additionally, six patients had a new onset of graft vessel disease (GVD) one yr after conversion. As a result of these adverse events, the study was stopped after inclusion of only 12 of the scheduled 30 patients. CONCLUSIONS:Conversion to MMF and steroids after HTx improves renal function, but increases the risk for recurrent rejection and GVD. Therefore, MMF and steroids should only be considered in patients with a markedly low risk for rejection.

journal_name

Clin Transplant

journal_title

Clinical transplantation

authors

Groetzner J,Kaczmarek I,Schirmer J,Uberfuhr P,Gulbins H,Daebritz S,Meiser B,Reichart B

doi

10.1111/j.1399-0012.2008.00828.x

subject

Has Abstract

pub_date

2008-09-01 00:00:00

pages

587-93

issue

5

eissn

0902-0063

issn

1399-0012

pii

CTR828

journal_volume

22

pub_type

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