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  • Title: Sustained-Release Tacrolimus Stabilizes Decline of Forced Expiratory Volume in 1 Second Through Decreasing Fluctuation of Its Trough Blood Level.
    Author: Matsuda Y, Eba S, Hoshi F, Oishi H, Sado T, Noda M, Sakurada A, Watanabe T, Niikawa H, Akiba M, Okada Y.
    Journal: Transplant Proc; 2018 Nov; 50(9):2768-2770. PubMed ID: 30401394.
    Abstract:
    BACKGROUND: Calcineurin inhibitors are a commonly used immunosuppressive drug and over 80% of lung transplant (LTx) recipients use tacrolimus. Sustained-release tacrolimus (SRT) was developed as a once-daily formulation, resulting in slower release and reduction in peak concentration compared with twice-daily immediate-release tacrolimus (IRT). Previous reports indicate that SRT may carry fewer side effects than IRT; however, the impact of SRT in bronchiolitis obliterans syndrome (BOS) after LTx is unclear. OBJECTIVE: Our study objective was to evaluate the effect of SRT in BOS after LTx. MATERIALS AND METHODS: We investigated the effect of SRT for BOS among 75 LTx recipients who were alive in 2017 in our LTx program. All analyses were carried out using student t test or F test. RESULTS: Thirty-five recipients took IRT, 32 recipients used SRT, 7 recipients used cyclosporine, and 1 patient who received bone marrow and a lung graft from the same donor did not use a calcineurin inhibitor. The most frequent reason for conversion of IRT to SRT was kidney dysfunction, followed by other IRT complications. Five recipients underwent conversion of IRT to SRT because of decline of forced expiratory volume in 1 second (FEV1) with fluctuation of the tacrolimus trough level. After induction of SRT, the fluctuation of the tacrolimus trough level was significantly reduced in 4 of 5 patients (P < .05). Before drug form conversion, the FEV1 in these 5 patients was significantly decreased; however, this exacerbation of FEV1 was attenuated after SRT induction (P < .05). CONCLUSION: SRT appeared to stabilize decline of FEV1 in patients with BOS possibly due to reducing the fluctuation of tacrolimus trough blood concentration.
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