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      Use of Everolimus in Liver Transplantation: Recommendations From a Working Group

      review-article
      , MD, PhD 1 , , MD 2 , , MD, PhD 3 , , MD, PhD 4 , , MD, PhD 5 , , MD 6 , , MD, PhD 7
      (Collab)
      Transplantation
      Lippincott Williams & Wilkins

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          Abstract

          Immunosuppression after liver transplantation (LT) is presently based on use of calcineurin inhibitors (CNI), although they are associated with an increased incidence of renal dysfunction, cardiovascular complications, and de novo and recurrent malignancies. Over the past decade, mammalian target of rapamycin inhibitors have received considerable attention as immunosuppressants because they are associated with a more favorable renal profile versus CNI, as well as antiproliferative activity in clinical studies. Comprehensive guidelines on use of everolimus (EVR) in LT are still lacking. In Italy, a project, named Everolimus: the road to long-term functioning, was initiated to collect the experience on EVR after LT with the aim of providing guidance for transplant clinicians. Herein, recommendations by this national consensus group, based on Delphi methodology, are presented. Consensus was reached on 20 of the 23 statements proposed, and their level of evidence, grade of recommendation, and percent of agreement are reported. Statements are grouped into 4 areas: (A) renal function; (B) time of EVR introduction, CNI reduction and elimination, and risk for graft rejection; (C) antiproliferative effects of EVR; and (D) management of EVR-related adverse events. The high level of consensus shows that there is good agreement on the routine use of EVR in predefined clinical scenarios, especially in light of posttransplant nephrotoxicity and other adverse events associated with long-term administration of CNIs.

          Abstract

          The authors summarize the recommendations reached by an Italian National Consensus group using the Delphi methodology on the use of everolimus in liver transplantation, particularly its role in renal function, antiproliferative effects, adverse events, timing of introduction, and rejection risk.

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          Most cited references41

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          Determination and quantification of content validity.

          M Lynn (1986)
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            Immunosuppressive drugs for kidney transplantation.

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              Pivotal role of mTOR signaling in hepatocellular carcinoma.

              The advent of targeted therapies in hepatocellular carcinoma (HCC) has underscored the importance of pathway characterization to identify novel molecular targets for treatment. We evaluated mTOR signaling in human HCC, as well as the antitumoral effect of a dual-level blockade of the mTOR pathway. The mTOR pathway was assessed using integrated data from mutation analysis (direct sequencing), DNA copy number changes (SNP-array), messenger RNA levels (quantitative reverse-transcription polymerase chain reaction and gene expression microarray), and protein activation (immunostaining) in 351 human samples [HCC (n = 314) and nontumoral tissue (n = 37)]. Effects of dual blockade of mTOR signaling using a rapamycin analogue (everolimus) and an epidermal/vascular endothelial growth factor receptor inhibitor (AEE788) were evaluated in liver cancer cell lines and in a xenograft model. Aberrant mTOR signaling (p-RPS6) was present in half of the cases, associated with insulin-like growth factor pathway activation, epidermal growth factor up-regulation, and PTEN dysregulation. PTEN and PI3KCA-B mutations were rare events. Chromosomal gains in RICTOR (25% of patients) and positive p-RPS6 staining correlated with recurrence. RICTOR-specific siRNA down-regulation reduced tumor cell viability in vitro. Blockage of mTOR signaling with everolimus in vitro and in a xenograft model decelerated tumor growth and increased survival. This effect was enhanced in vivo after epidermal growth factor blockade. MTOR signaling has a critical role in the pathogenesis of HCC, with evidence for the role of RICTOR in hepato-oncogenesis. MTOR blockade with everolimus is effective in vivo. These findings establish a rationale for targeting the mTOR pathway in clinical trials in HCC.
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                Author and article information

                Journal
                Transplantation
                Transplantation
                TP
                Transplantation
                Lippincott Williams & Wilkins
                0041-1337
                1534-6080
                February 2017
                28 July 2016
                : 101
                : 2
                : 239-251
                Affiliations
                [1] 1 Hepatobiliary Surgery and Liver Transplantation Unit, University of Pisa Medical School Hospital, Pisa, Italy.
                [2] 2 Gastroenterology and Transplant Hepatology, Ospedale Papa Giovanni XXIII, Bergamo, Italy.
                [3] 3 Department of Medical and Surgical Sciences, University of Bologna and Azienda Ospedaliero-Universitaria di Bologna, Policlinico Sant’Orsola Malpighi, Bologna, Italy.
                [4] 4 Department of General Surgery and Transplantation, Niguarda Hospital, Milan, Italy.
                [5] 5 Department of Experimental Medicine and Surgery, Transplantation Surgery, Rome, Italy.
                [6] 6 Mediterranean Institute for Transplantation and Advanced Specialized Therapies (ISMETT/IRCCS), Palermo, Italy.
                [7] 7 University Hospital of Padua, Padua, Italy.
                Author notes
                Correspondence: Stefano Fagiuoli, MD, Gastroenterology and Transplant Hepatology, Ospedale Papa Giovanni XXIII, Piazza Oms 1, 24127 Bergamo, Italy. ( sfagiuoli@ 123456asst-pg23.it ).
                Article
                TP500716 00012
                10.1097/TP.0000000000001438
                5265697
                27495768
                bd8b761a-ec47-40b7-97db-0cdb12d92457
                Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved

                This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.

                History
                : 5 April 2016
                : 10 June 2016
                : 27 June 2016
                Page count
                Pages: 0
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