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de Oliveira JTP, Kieling CO, da Silva AB, Stefani J, Witkowski MC, Smidt CR, Mariano da Rocha CR, Hirakata VN, Grossini MDG, Zanotelli ML, Gonçalves Vieira SM. Variability index of tacrolimus serum levels in pediatric liver transplant recipients younger than 12 years: Non-adherence or risk of non-adherence? Pediatr Transplant 2017; 21. [PMID: 29034612 DOI: 10.1111/petr.13058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/08/2017] [Indexed: 12/29/2022]
Abstract
MLVI has been used to assess adherence. To determine the MLVI in children <12 years of age at transplantation and to identify demographic correlates and consequences for the graft. This is a retrospective study of 50 outpatients (4.0 ± 3.5 years), at least 13-month post-liver transplantation. The outcomes evaluated were MLVI, ALT > 60 IU/L, ACR, death, and graft loss. We analyzed demographic and socioeconomic characteristics, indication for transplantation, and type of donor. Student's t test and the chi-square test were used. Statistical significance was set at P ≤ .05. Seventy-two percent were infants or preschoolers, 62% biliary atresia. Seventy-four percent of the mothers had middle-school education, and 54% of the families had an income ≤3632.4 US$/y. Twenty-two (44%) patients had a MLVI ≥ 2 SD; this was more prevalent in families with higher incomes (P = .045). ALT levels > 60 IU/L were more common in MLVI ≥ 2 SD group (P = .035). ACR episodes were similar between groups (P = 1.000). No patient died or lost the graft. MLVI ≥ 2 SD may be an indicator of the risk of medication non-adherence.
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Affiliation(s)
- Janete Teresinha Pires de Oliveira
- Postgraduate Program in Gastroenterology and Hepatology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Pediatric Unit, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | | | - Anaís Back da Silva
- Medical School, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Joel Stefani
- Medical School, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Maria Carolina Witkowski
- Postgraduate Program in Child and Adolescent Health, Pediatric Unit, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Camila Ribas Smidt
- Postgraduate Program in Gastroenterology and Hepatology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Vania Naomi Hirakata
- Postgraduate and Research Unit, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | | | - Maria Lúcia Zanotelli
- Surgery Unit, Pediatric Liver Transplantation Unit, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Sandra Maria Gonçalves Vieira
- Department of Pediatrics, Postgraduate Program in Gastroenterology and Hepatology, Pediatric Unit, Pediatric Liver Transplant Program, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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Safety and Tolerance of Donor-Derived Mesenchymal Stem Cells in Pediatric Living-Donor Liver Transplantation: The MYSTEP1 Study. Stem Cells Int 2017; 2017:2352954. [PMID: 28740511 PMCID: PMC5504958 DOI: 10.1155/2017/2352954] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 05/08/2017] [Indexed: 12/14/2022] Open
Abstract
Background Calcineurin inhibitors (CNI) have significantly improved patient and graft survival in pediatric liver transplantation (pLT). However, CNI toxicity leads to significant morbidity. Moreover, CNIs cannot prevent long-term allograft injury. Mesenchymal stem (stromal) cells (MSC) have potent immunomodulatory properties, which may promote allograft tolerance and ameliorate toxicity of high-dose CNI. The MYSTEP1 trial aims to investigate safety and feasibility of donor-derived MSCs in pLT. Methods/Design 7 to 10 children undergoing living-donor pLT will be included in this open-label, prospective pilot trial. A dose of 1 × 106 MSCs/kg body weight will be given at two time points: first by intraportal infusion intraoperatively and second by intravenous infusion on postoperative day 2. In addition, participants will receive standard immunosuppressive treatment. Our primary objective is to assess the safety of intraportal and intravenous MSC infusion in pLT recipients. Our secondary objective is to evaluate efficacy of MSC treatment as measured by the individual need for immunosuppression and the incidence of biopsy-proven acute rejection. We will perform detailed immune monitoring to investigate immunomodulatory effects. Discussion Our study will provide information on the safety of donor-derived MSCs in pediatric living-donor liver transplantation and their effect on immunomodulation and graft survival.
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Miloh T, Barton A, Wheeler J, Pham Y, Hewitt W, Keegan T, Sanchez C, Bulut P, Goss J. Immunosuppression in pediatric liver transplant recipients: Unique aspects. Liver Transpl 2017; 23:244-256. [PMID: 27874250 DOI: 10.1002/lt.24677] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 11/03/2016] [Indexed: 02/07/2023]
Abstract
Pediatric liver transplantation has experienced improved outcomes over the last 50 years. This can be attributed in part to establishing optimal use of immunosuppressive agents to achieve a balance between minimizing the risks of allograft rejection and infection. The management of immunosuppression in children is generally more complex and can be challenging when compared with the use of these agents in adult liver transplant patients. Physiologic differences in children alter the pharmacokinetics of immunosuppressive agents, which affects absorption, distribution, metabolism, and drug excretion. Children also have a longer expected period of exposure to immunosuppression, which can impact growth, risk of infection (bacterial, viral, and fungal), carcinogenesis, and likelihood of nonadherence. This review discusses immunosuppressive options for pediatric liver transplant recipients and the unique issues that must be addressed when managing this population. Further advances in the field of tolerance and accommodation are needed to relieve the acute and cumulative burden of chronic immunosuppression in children. Liver Transplantation 23 244-256 2017 AASLD.
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Affiliation(s)
- Tamir Miloh
- Texas Children's Hospital and Baylor College of Medicine, Houston, TX
| | - Andrea Barton
- Texas Children's Hospital and Baylor College of Medicine, Houston, TX
| | | | - Yen Pham
- Texas Children's Hospital and Baylor College of Medicine, Houston, TX
| | | | | | | | | | - John Goss
- Texas Children's Hospital and Baylor College of Medicine, Houston, TX
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Hartleif S, Lang P, Handgretinger R, Feuchtinger T, Fuchs J, Königsrainer A, Nadalin S, Sturm E. Outcomes of pediatric identical living-donor liver and hematopoietic stem cell transplantation. Pediatr Transplant 2016; 20:888-897. [PMID: 27241476 DOI: 10.1111/petr.12725] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/26/2016] [Indexed: 11/29/2022]
Abstract
Chronic IS is associated with significant morbidity in transplant recipients. Moreover, IS does not prevent chronic graft failure frequently. Allograft immune tolerance in LT can be induced by complete donor chimerism through allogenic HSCT combined with identical LDLT. This approach may exempt patients from chronic lifelong IS. However, it is unclear whether its benefits justify its risks. Here, we present three cases from our institution and analyze seven additional reports of children treated with HSCT/LDLT, all receiving HSCT due to hemato-oncological indications. In eight of 10 cases, donor macrochimerism resulted in allograft tolerance. Nine patients survived. One patient died due to fulminant ADV infection. Further complications were GvHD (n = 3) and bone marrow failure (n = 2). In conclusion, donor-specific allograft tolerance can be achieved by identical-donor HSCT/LDLT. However, at present, this approach should generally be limited to selected indications due to a potentially unfavorable risk-benefit ratio. Novel toxicity-reduced conditioning protocols for HSCT/LDLT in the absence of malignant or non-hepatic disease may prove to be a sufficiently safe approach for inducing graft tolerance in children receiving a LDLT in the future. This concept may reduce the burden of lifelong IS.
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Affiliation(s)
- Steffen Hartleif
- Department of Pediatric Gastroenterology and Hepatology, University Hospital Tuebingen, Tuebingen, Germany
| | - Peter Lang
- Department of Pediatric Hematology and Oncology, University Hospital Tuebingen, Tuebingen, Germany
| | - Rupert Handgretinger
- Department of Pediatric Hematology and Oncology, University Hospital Tuebingen, Tuebingen, Germany
| | - Tobias Feuchtinger
- Department of Pediatric Hematology and Oncology, University Hospital Tuebingen, Tuebingen, Germany
| | - Jörg Fuchs
- Department of Pediatric Surgery and Urology, University Hospital Tuebingen, Tuebingen, Germany
| | - Alfred Königsrainer
- Department of Visceral- and Transplantation Surgery, University Hospital Tuebingen, Tuebingen, Germany
| | - Silvio Nadalin
- Department of Visceral- and Transplantation Surgery, University Hospital Tuebingen, Tuebingen, Germany
| | - Ekkehard Sturm
- Department of Pediatric Gastroenterology and Hepatology, University Hospital Tuebingen, Tuebingen, Germany.
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Moini M, Schilsky ML, Tichy EM. Review on immunosuppression in liver transplantation. World J Hepatol 2015; 7:1355-1368. [PMID: 26052381 PMCID: PMC4450199 DOI: 10.4254/wjh.v7.i10.1355] [Citation(s) in RCA: 144] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 12/23/2014] [Accepted: 02/12/2015] [Indexed: 02/06/2023] Open
Abstract
The optimal level of immunosuppression in solid organ transplantation, in particular for the liver, is a delicate balance between the benefit of preventing rejection and the adverse side effects of immunosuppression. There is uncertainty about when this level is achieved in any individual recipient. Immunosuppression regimens vary between individual centers and changes with time as new agents and data are available. Presently concerns about the adverse side effects of calcineurin inhibitor, the main class of immunosuppressive agents used in liver transplantation (LT), has led to consideration of the use of antibody induction therapies for patients at higher risk of developing adverse side effects. The longevity of the transplanted organ is potentially improved by better management of rejection episodes and special consideration for tailoring of immunosuppression to the individual with viral hepatitis C, hepatocellular carcinoma or pregnancy. This review provides an overview of the current strategies for post LT immunosuppression and discusses modifications to consider for special patient populations.
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