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  • Title: Improvement in renal function after everolimus introduction and calcineurin inhibitor reduction in maintenance thoracic transplant recipients: the significance of baseline glomerular filtration rate.
    Author: Arora S, Gude E, Sigurdardottir V, Mortensen SA, Eiskjær H, Riise G, Mared L, Bjørtuft O, Ekmehag B, Jansson K, Simonsen S, Aukrust P, Solbu D, Iversen M, Gullestad L.
    Journal: J Heart Lung Transplant; 2012 Mar; 31(3):259-65. PubMed ID: 22333403.
    Abstract:
    BACKGROUND: The NOCTET (NOrdic Certican Trial in HEart and lung Transplantation) trial demonstrated that everolimus improves renal function in maintenance thoracic transplant (TTx) recipients. Nevertheless, introduction of everolimus is not recommended for patients with advanced renal failure. We evaluated NOCTET data to assess everolimus introduction amongst TTx recipients with advanced renal failure. METHODS: This 12-month multicenter Scandinavian study randomized 282 maintenance TTx recipients to everolimus introduction with calcineurin inhibitor (CNI) reduction or standard CNI therapy. The measured glomerular filtration rate (mGFR) was noted at baseline and after 1-year using Cr-ethylenediaminetetraacetic acid clearance. RESULTS: In 21 patients with a baseline mGFR of 20 to 29 ml/min/1.73 m(2), renal function improved in the everolimus group compared with the control group ((ΔmGFR 6.7 ± 9.0 vs -1.6 ± 5.1 ml/min/1.73 m(2); p = 0.03). Amongst 173 patients with moderate renal impairment (mGFR 30-59 ml/min/1.73 m(2)), renal function improvement was also greater amongst everolimus patients than in controls (ΔmGFR 5.1 ± 11.1 vs -0.5 ± 8.7 ml/min/1.73 m(2); p < 0.01). In 55 patients with mGFR 60 to 89 ml/min/1.73 m(2), mGFR did not change significantly in either group. Improvement in mGFR was limited to patients with a median time since TTx of less than 4.6 years and was also influenced by CNI reduction during the study period. CONCLUSIONS: Everolimus introduction and reduced CNI significantly improved renal function amongst maintenance TTx patients with pre-existing advanced renal failure. This beneficial effect was limited to patients undergoing conversion in less than 5 years after TTx, indicating a window of opportunity that is appropriate for pharmacologic intervention with everolimus.
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