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Prytula A, Shroff R, van Gremberghe I, Krupka K, Bacchetta J, Benetti E, Grenda R, Guzzo I, Kanzelmeyer N, Büyükkaragöz B, Kranz B, Nalçacıoğlu H, Oh J, Pape L, Shenoy M, Sellier-Leclerc AL, Tönshoff B. Metabolic Acidosis Is Associated With an Accelerated Decline of Allograft Function in Pediatric Kidney Transplantation. Kidney Int Rep 2024; 9:1684-1693. [PMID: 38899185 PMCID: PMC11184248 DOI: 10.1016/j.ekir.2024.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 03/26/2024] [Accepted: 04/01/2024] [Indexed: 06/21/2024] Open
Abstract
Introduction We investigated the relationship between metabolic acidosis over time and allograft outcome in pediatric kidney transplantation (KTx). Methods This registry study collected data up to 10 years posttransplant. Survival analysis for a composite end point of graft loss or estimated glomerular filtration rate (eGFR) ≤ 30 ml/min per 1.73 m2 or ≥50% decline from eGFR at month 3 posttransplant was performed. The association of serum bicarbonate concentration (HCO3 -) < 22 mmol/l (metabolic acidosis) and HCO3 - < 18 mmol/l (severe metabolic acidosis) with allograft outcome was investigated using stratified Cox models and marginal structural models. Secondary analyses included the identification of risk factors for metabolic acidosis and the relationship between alkali supplementation and allograft outcome. Results We report on 1911 patients, of whom 347 reached the composite end point. The prevalence of metabolic acidosis over time ranged from 20.4% to 38.9%. In the adjusted Cox models, metabolic acidosis (hazard ratio [HR], 2.00; 95% confidence interval [CI], 1.54-2.60) and severe metabolic acidosis (HR, 2.49; 95% CI, 1.56-3.99) were associated with allograft dysfunction. Marginal structural models showed similar results (HR, 1.75; 95% CI, 1.32-2.31 and HR, 2.09; 95% CI, 1.23-3.55, respectively). Older age was associated with a lower risk of metabolic acidosis (odds ratio [OR] 0.93/yr older; 95% CI, 0.91-0.96) and severe metabolic acidosis (OR, 0.89; 95% CI, 0.84-0.95). Patients with uncontrolled metabolic acidosis had the worst outcome compared to those without metabolic acidosis and without alkali (HR, 3.70; 95% CI, 2.54-5.40). Conclusion The degree of metabolic acidosis is associated with allograft dysfunction.
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Affiliation(s)
- Agnieszka Prytula
- Department of Pediatric Nephrology and Rheumatology, Ghent University Hospital, Belgium
| | | | - Ineke van Gremberghe
- Biostatistics Unit, Faculty of Medicine and Health Sciences, Ghent University, Belgium
| | - Kai Krupka
- Department of Pediatrics I, University Children’s Hospital Heidelberg, Germany
| | - Justine Bacchetta
- Department of Pediatric Nephrology and Rheumatology, CHU de Lyon, Bron, France
| | - Elisa Benetti
- Pediatric Nephrology, Dialysis and Transplant Unit, Laboratory of Immunopathology and Molecular Biology of the Kidney, Department of Women’s and Children’s Health, Padua University Hospital, Padua, Italy
| | - Ryszard Grenda
- Department of Nephrology, Kidney Transplantation and Arterial Hypertension, Children’s Memorial Health Institute, Warsaw, Poland
| | - Isabella Guzzo
- Division of Nephrology, Dialysis and Renal Transplant Unit, Bambino Gesù Children’s Hospital IRCCS, Rome, Italy
| | - Nele Kanzelmeyer
- Department of Pediatric Kidney, Liver and Metabolic Diseases, Hannover Medical School, Hannover, Germany
| | | | - Birgitta Kranz
- Pediatric Nephrology, University Children‘s Hospital, Münster, Germany
| | - Hülya Nalçacıoğlu
- Pediatric Nephrology Department, Ondokuz Mayis University, Samsun, Turkey
| | - Jun Oh
- Department of Pediatric Nephrology and Transplantation, University Children’s Hospital, University Medical Center Hamburg/Eppendorf, Hamburg, Germany
| | - Lars Pape
- Department of Pediatrics II, University Hospital of Essen, Essen, Germany
| | - Mohan Shenoy
- Royal Manchester Children’s Hospital, Manchester, UK
| | | | - Burkhard Tönshoff
- Department of Pediatrics I, University Children’s Hospital Heidelberg, Germany
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2
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Chen F, Yong JK, Shen C, Zhou T, Feng M, Wan P, Luo Y, Lin H, Qian Y, Xia Q. High intra-patient variability of tacrolimus within post-operative 1 month predicted worse 1-year outcomes in pediatric liver transplant recipients. Eur J Clin Pharmacol 2024:10.1007/s00228-024-03663-z. [PMID: 38502358 DOI: 10.1007/s00228-024-03663-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 03/04/2024] [Indexed: 03/21/2024]
Abstract
BACKGROUND The pharmacokinetics of tacrolimus (TAC) show high intra-patient variability (IPV), which is associated with poor long-term outcomes following adult liver transplantation (LT). However, this relationship remains to be confirmed in pediatric liver transplant (PLT) recipients. The present study aimed to investigate the association between TAC IPV and grafts or patient outcomes after pediatric liver transplantion. METHODS This retrospective study included 848 PLT recipients (including infants) between January, 2016, and June, 2021. The IPV of TAC concentrations was estimated by calculating the coefficient of variation (CV) of trough concentrations in whole blood within 1 month after transplantation. Patients were categorized into two groups, low IPV (CV < 45%) and high IPV (CV ≥ 45%), based on the third quartile of the CV distribution. RESULTS A total of 848 patients were included in our study. The low CV group included 614 patients, with a mean TAC trough concentration of 8.59 ± 1.65 ng/ml and a median CV of 32.37%. In contrast, the high CV group included 214 patients, the mean TAC trough concentration and median CV were 8.81 ± 2.00 ng/ml and 54.88%, respectively. The median hospital duration was significantly higher in the high CV group (22 days vs. 20 days, P = 0.01). Univariate analysis was performed to evaluate the significant differences in 1-year recipient survival (P = 0.041) and 1-year graft survival (P = 0.005) between the high- and low-CV groups. Moreover, high CV (HR 2.316, 95%CI 1.026-5.231, P = 0.043) and persistent EBV viremia (HR 13.165, 95%CI 3.090-56.081, P < 0.001) were identified as independent risk factors for 1- year mortality after PLT. CONCLUSIONS PLT recipients with high TAC trough concentration of CV in the first month were associated with poor 1-year outcomes. This CV calculation provides a valuable strategy to monitor TAC exposure.
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Affiliation(s)
- Fang Chen
- Department of Pharmacy, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200127, People's Republic of China
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, No. 1630 Dongfang Road, Shanghai, 200127, People's Republic of China
| | - June-Kong Yong
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, No. 1630 Dongfang Road, Shanghai, 200127, People's Republic of China
| | - Chuan Shen
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, No. 1630 Dongfang Road, Shanghai, 200127, People's Republic of China
| | - Tao Zhou
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, No. 1630 Dongfang Road, Shanghai, 200127, People's Republic of China
| | - Mingxuan Feng
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, No. 1630 Dongfang Road, Shanghai, 200127, People's Republic of China
| | - Ping Wan
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, No. 1630 Dongfang Road, Shanghai, 200127, People's Republic of China
| | - Yi Luo
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, No. 1630 Dongfang Road, Shanghai, 200127, People's Republic of China
| | - Houwen Lin
- Department of Pharmacy, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200127, People's Republic of China
| | - Yongbing Qian
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, No. 1630 Dongfang Road, Shanghai, 200127, People's Republic of China.
| | - Qiang Xia
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, No. 1630 Dongfang Road, Shanghai, 200127, People's Republic of China.
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3
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Braekman E, De Bruyne R, Vandekerckhove K, Prytula A. Etiology, risk factors and management of hypertension post liver transplantation. Pediatr Transplant 2024; 28:e14630. [PMID: 37915282 DOI: 10.1111/petr.14630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 09/09/2023] [Accepted: 10/11/2023] [Indexed: 11/03/2023]
Abstract
BACKGROUND Cardiovascular events are one of the most important causes of morbidity and mortality in the long-term follow-up of liver transplant recipients. Hypertension is a significant cardiovascular risk factor that occurs frequently after pediatric liver transplantation. Chronic use of immunosuppressants - mainly calcineurin inhibitors - plays a major role in the development of post-transplant hypertension and circadian disturbances such as flattening of the nocturnal blood pressure dip. This requires special attention in children given the long timeframe during which immunosuppressive therapy is necessary. Careful and structured blood pressure monitoring and adequate treatment of hypertension are essential to optimize the quality of life and life expectancy of pediatric liver transplant patients. However, evidence-based guidelines for monitoring and management of post-transplant hypertension and its complications are lacking. METHODS We conducted a comprehensive review of the current knowledge and practices concerning post-transplant hypertension. The databases Pubmed, Embase, Web of Science and Google Scholar were scanned with the following keywords: pediatric liver transplantation, immunosuppression, tacrolimus, cardiovascular effects, hypertension, heart function, kidney function, circadian rhythm, mechanism, monitoring, and management. RESULTS In this review, we describe the incidence and etiology of hypertension in pediatric liver transplant recipients, the underlying mechanisms and characteristics of calcineurin inhibitor-induced hypertension, and the consequences of and risk factors for post-transplant hypertension. We hereby present an overview of the current practices in blood pressure monitoring and antihypertensive treatment as well as an algorithm for the evaluation and management of hypertension post liver transplantation. Finally, we discuss knowledge gaps and suggestions for future research.
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Affiliation(s)
- Eline Braekman
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
| | - Ruth De Bruyne
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
- Department of Pediatric Gastroenterology, Hepatology and Nutrition, Ghent University Hospital, Ghent, Belgium
| | - Kristof Vandekerckhove
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
- Department of Pediatric Cardiology, Ghent University Hospital, Ghent, Belgium
| | - Agnieszka Prytula
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
- Department of Pediatric Nephrology and Rheumatology, Ghent University Hospital, Ghent, Belgium
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Li P, Zhang R, Zhou J, Guo P, Liu Y, Shi S. Vancomycin relieves tacrolimus-induced hyperglycemia by eliminating gut bacterial beta-glucuronidase enzyme activity. Gut Microbes 2024; 16:2310277. [PMID: 38332701 PMCID: PMC10860355 DOI: 10.1080/19490976.2024.2310277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Accepted: 01/22/2024] [Indexed: 02/10/2024] Open
Abstract
Up to 40% of transplant recipients treated long-term with tacrolimus (TAC) develop post-transplant diabetes mellitus (PTDM). TAC is an important risk factor for PTDM, but is also essential for immunosuppression after transplantation. Long-term TAC treatment alters the gut microbiome, but the mechanisms of TAC-induced gut microbiota in the pathogenesis of PTDM are poorly characterized. Here, we showed that vancomycin, an inhibitor of bacterial beta-glucuronidase (GUS), prevents TAC-induced glucose disorder and insulin resistance in mice. Metagenomics shows that GUS-producing bacteria are predominant and flourish in the TAC-induced hyperglycemia mouse model, with upregulation of intestinal GUS activity. Targeted metabolomics analysis revealed that in the presence of high GUS activity, the hydrolysis of bile acid (BAs)-glucuronic conjugates is increased and most BAs are overproduced in the serum and liver, which, in turn, activates the ileal farnesoid X receptor (FXR) and suppresses GLP-1 secretion by L-cells. The GUS inhibitor vancomycin significantly eliminated GUS-producing bacteria and inhibited bacterial GUS activity and BAs levels, thereby enhancing L-cell GLP-1 secretion and preventing hyperglycemia. Our results propose a novel clinical strategy for inhibiting the bacterial GUS enzyme to prevent hyperglycemia without requiring withdrawal of TAC treatment. This strategy exerted its effect through the ileal bile acid-FXR-GLP-1 pathway.
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Affiliation(s)
- Peixia Li
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Rui Zhang
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jinping Zhou
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Pengpeng Guo
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yani Liu
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shaojun Shi
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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5
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Niu W, Zheng X, Li Z, Wu Z, Zhong M, Qiu X. Donor and recipient polymorphisms of MAPK signaling pathway genes influence post-transplant liver function in Chinese liver transplant patients taking tacrolimus. Gene X 2023; 857:147190. [PMID: 36632909 DOI: 10.1016/j.gene.2023.147190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 12/15/2022] [Accepted: 01/06/2023] [Indexed: 01/11/2023] Open
Abstract
Tacrolimus (TAC) is an immunosuppressive drug that is widely used for patients who underwent liver transplantation. In addition to inhibiting the action of calcineurin, TAC also exerts its immunosuppressive effects by interfering with mitogen activated protein kinase (MAPK) pathway. In this study, we investigated the impact of both recipient and donor genetic polymorphisms of MAPK kinase kinase (MAP3K) genes on clinical events in Han Chinese liver transplantation recipients taking TAC. Fifty-seven tag SNPs of 11 genes (MEKK1, MEKK2, MEKK4, MLK1, MLK3, ASK1, TAO1, TAO2, Tpl2, TAK1 and ZAK1) in the MAPK pathway were detected by MALDI-TOF MS assay in 175 TAC-treated liver transplant recipients. The associations of SNPs with incidence of acute rejection, TAC-induced acute nephrotoxicity, and post-transplantation liver and kidney function were explored using Kaplan-Meier survival analysis, Cox-proportional hazard model and linear mixed model, respectively. For the sites significantly associated with clinical events, the dual-luciferase reporter gene system was used to perform preliminary function verification. The results showed that (1) Donor-recipient combinational (D-R) MEKK1 rs62355944 and D-R MLK1 rs8006424 genotypes were significant influence factors of post-transplantation γ-glutamyl transpeptidase (GGT) level (P < 0.0001); (2) D-R MLK1 rs8006424 genotypes were found to significantly affect the alkaline phosphatase (ALP) level after transplantation (P < 0.0001). The results of the dual luciferase reporter gene system demonstrated that the luciferase activity of the pGL3-rs8006424A was significantly higher than that of pGL3-rs8006424G (3.47 ± 0.10 vs 2.97 ± 0.08, P = 0.002). Therefore, MEKK1 rs62355944 and MLK1 rs8006424 might serve as biomarkers to predict post-transplant liver function in liver transplant patients.
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Affiliation(s)
- Wanjie Niu
- Department of Pharmacy, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Xinyi Zheng
- Department of Pharmacy, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Ziran Li
- Department of Pharmacy, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Zhuo Wu
- Department of Pharmacy, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Mingkang Zhong
- Department of Pharmacy, Huashan Hospital, Fudan University, Shanghai 200040, China.
| | - Xiaoyan Qiu
- Department of Pharmacy, Huashan Hospital, Fudan University, Shanghai 200040, China.
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6
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Zuo M, Shang Y, Guo Y, Sun Y, Xu G, Chen J, Zhu L. Population Pharmacokinetics of Tacrolimus in Pediatric Patients With Umbilical Cord Blood Transplant. J Clin Pharmacol 2023; 63:298-306. [PMID: 36196568 DOI: 10.1002/jcph.2162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 09/27/2022] [Indexed: 11/11/2022]
Abstract
Tacrolimus was frequently used in pediatric patients with umbilical cord blood transplant for the prevention of graft-versus-host disease. The aim of the present study was to evaluate the population pharmacokinetics of tacrolimus among pediatric patients with umbilical cord blood transplant and find potential influenced factors. A total of 275 concentrations from 13 pediatric patients were used to build a polulation pharmacokinetic model using a nonlinear mixed-effects modeling approach. The impact of demographic features, biological characteristics, and concomitant medications, including sex, age, body weight, postoperative day, white blood cell count, red blood cell count, hemoglobin, platelets, hematocrit, blood urea nitrogen, creatinine, aspartate transaminase, alanine transaminase, total bilirubin, albumin, and total protein were investigated. The pharmacokinetics of tacrolimus were best described by a 1-compartment model with first- and zero-order mixed absorption and first-order elimination. The clearance and volume of distribution of tacrolimus were 1.93 L/h and 75.1 L, respectively. A covariate analysis identified that postoperative day and co-administration with trimethoprim-sulfamethoxazole were significant covariates influencing clearance of tacrolimus. Frequent blood monitoring and dose adjustment might be needed with the prolongation of postoperative day and coadministration with trimethoprim-sulfamethoxazole.
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Affiliation(s)
- Meiling Zuo
- Pharmaceutical College, Tianjin Medical University, Tianjin, China
| | - Yue Shang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Ye Guo
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Yuxuan Sun
- Pharmaceutical College, Tianjin Medical University, Tianjin, China
| | - Gaoqi Xu
- The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, Zhejiang, China
| | - Jingtao Chen
- School of Statistics and Data Science, Nankai University, Tianjin, China
| | - Liqin Zhu
- Pharmaceutical College, Tianjin Medical University, Tianjin, China.,Department of Pharmacy, Tianjin First Central Hospital, Tianjin, China
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7
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Baghai Arassi M, Gauche L, Schmidt J, Höcker B, Rieger S, Süsal C, Tönshoff B, Fichtner A. Association of intraindividual tacrolimus variability with de novo donor-specific HLA antibody development and allograft rejection in pediatric kidney transplant recipients with low immunological risk. Pediatr Nephrol 2022; 37:2503-2514. [PMID: 35166920 PMCID: PMC9395307 DOI: 10.1007/s00467-022-05426-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 11/24/2021] [Accepted: 12/13/2021] [Indexed: 12/15/2022]
Abstract
BACKGROUND Tacrolimus (Tac) intraindividual variability (TacIPV) in pediatric kidney transplant patients is only poorly understood. We investigated the impact of TacIPV on de novo donor-specific HLA antibodies (dnDSA) development and allograft rejection in Caucasian pediatric recipients of a living or deceased donor kidney with low immunological risk. METHODS This was a single-center retrospective study including 48 pediatric kidney transplant recipients. TacIPV was calculated based on coefficient of variation (CV%) 6-12 months posttransplant. TacIPV cutoff was set at the median (25%). Outcome parameters were dnDSA development and rejection episodes. RESULTS In total, 566 Tac levels were measured with median 11.0 (6.0-17.0) measurements per patient. The cutoff of 25% corresponded to the median CV% in our study cohort (25%, IQR 18-35%) and was comparable to cutoffs determined by receiver operating characteristic (ROC) curve analysis. High TacIPV was associated with higher risk of dnDSA development (HR 3.4, 95% CI 1.0-11.1, P = 0.047; Kaplan-Meier analysis P = 0.018) and any kind of rejection episodes (HR 4.1, 95% CI 1.1-14.8, P = 0.033; Kaplan-Meier analysis P = 0.010). There was a clear trend towards higher TacIPV below the age of 6 years. TacIPV (CV%) was stable over time. A TacIPV (CV%) cutoff of 30% or IPV quantification by mean absolute deviation (MAD) showed comparable results. CONCLUSIONS High TacIPV is associated with an increased risk of dnDSA development and rejection episodes > year 1 posttransplant even in patients with low immunological risk profile. Therefore, in patients with high TacIPV, potential causes should be addressed, and if not resolved, changes in immunosuppressive therapy should be considered. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Maral Baghai Arassi
- Department of Pediatrics I, University Children's Hospital Heidelberg, Heidelberg, Germany. .,Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany.
| | - Laura Gauche
- Department of Pediatrics I, University Children’s Hospital Heidelberg, Heidelberg, Germany
| | - Jeremy Schmidt
- Department of Pediatrics I, University Children’s Hospital Heidelberg, Heidelberg, Germany
| | - Britta Höcker
- Department of Pediatrics I, University Children’s Hospital Heidelberg, Heidelberg, Germany
| | - Susanne Rieger
- Department of Pediatrics I, University Children’s Hospital Heidelberg, Heidelberg, Germany
| | - Caner Süsal
- Institute of Immunology, Transplantation Immunology, University Hospital Heidelberg, Heidelberg, Germany
| | - Burkhard Tönshoff
- Department of Pediatrics I, University Children’s Hospital Heidelberg, Heidelberg, Germany
| | - Alexander Fichtner
- Department of Pediatrics I, University Children’s Hospital Heidelberg, Heidelberg, Germany
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8
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Andrews LM, de Winter BCM, Cornelissen EAM, de Jong H, Hesselink DA, Schreuder MF, Brüggemann RJM, van Gelder T, Cransberg K. A Population Pharmacokinetic Model Does Not Predict the Optimal Starting Dose of Tacrolimus in Pediatric Renal Transplant Recipients in a Prospective Study: Lessons Learned and Model Improvement. Clin Pharmacokinet 2021; 59:591-603. [PMID: 31654367 PMCID: PMC7217818 DOI: 10.1007/s40262-019-00831-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background and Objective Bodyweight-based dosing of tacrolimus is considered standard care. Currently, at first steady state, a third of pediatric kidney transplant recipients has a tacrolimus pre-dose concentration within the target range. We investigated whether adaptation of the starting dose according to a validated dosing algorithm could increase this proportion. Methods This was a multi-center, single-arm, prospective trial with a planned interim analysis after 16 patients, in which the tacrolimus starting dose was based on bodyweight, cytochrome P450 3A5 genotype, and donor status (living vs. deceased donor). Results At the interim analysis, 31% of children had a tacrolimus pre-dose concentration within the target range. As the original dosing algorithm was poorly predictive of tacrolimus exposure, the clinical trial was terminated prematurely. Next, the original model was improved by including the data of the children included in this trial, thereby doubling the number of children in the model building cohort. Data were best described with a two-compartment model with inter-individual variability, allometric scaling, and inter-occasion variability on clearance. Cytochrome P450 3A5 genotype, hematocrit, and creatinine influenced the tacrolimus clearance. A new starting dose model was developed in which the cytochrome P450 3A5 genotype was incorporated. Both models were successfully internally and externally validated. Conclusions The weight-normalized starting dose of tacrolimus should be higher in patients with a lower bodyweight and in those who are cytochrome P450 3A5 expressers. Electronic supplementary material The online version of this article (10.1007/s40262-019-00831-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Louise M Andrews
- Department of Hospital Pharmacy, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands.
| | - Brenda C M de Winter
- Department of Hospital Pharmacy, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands
| | - Elisabeth A M Cornelissen
- Department of Pediatric Nephrology, Radboudumc Amalia Children's Hospital, Nijmegen, The Netherlands
| | - Huib de Jong
- Department of Pediatric Nephrology, Erasmus MC-Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Dennis A Hesselink
- Department of Internal Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Michiel F Schreuder
- Department of Pediatric Nephrology, Radboudumc Amalia Children's Hospital, Nijmegen, The Netherlands
| | | | - Teun van Gelder
- Department of Hospital Pharmacy, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands
- Department of Internal Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Karlien Cransberg
- Department of Pediatric Nephrology, Erasmus MC-Sophia Children's Hospital, Rotterdam, The Netherlands
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9
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Yin S, Wang X, Huang Z, Fan Y, Song T, Lin T. Tacrolimus variability score outperforms coefficient of variation in predicting clinical outcomes of living kidney transplantation. Br J Clin Pharmacol 2021; 88:75-83. [PMID: 33899267 DOI: 10.1111/bcp.14876] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 04/04/2021] [Accepted: 04/06/2021] [Indexed: 02/05/2023] Open
Abstract
AIMS Intrapatient variability (IPV) was previously defined as coefficient of variation (CV) or standard deviation of tacrolimus (Tac) exposure while none of them was easily being interpreted and translated into clinical practice after kidney transplantation. METHODS We developed a novel Tac variability score (TVS) to evaluate IPV by calculating the frequency of clinically significant changes of Tac trough levels after kidney transplantation. Multivariate Cox proportional analyses were conducted to compare the impact of TVS and CV on transplant outcomes. RESULTS A total of 1343 patients were divided into high TVS (>0.30) and low TVS (<0.30) groups, and low CV (<0.30) and high CV (>0.30) groups. Univariate analyses showed that high TVS (hazard ratio [HR]: 2.323, 95% confidence interval [CI]: 1.455-3.709) and high CV (HR: 1.606, 95%CI: 1.044-2.471) were associated with inferior graft survival. However, only TVS was an independent predictor for graft failure in multivariate analyses (HR: 1.972, 95%CI: 1.2-3.24), and the correlation maintained in high CV (P = .020) and low CV (P = .037) subgroups, while CV failed to predict graft loss in neither low (P = .387) nor high TVS (P = .600) subgroups. In addition, TVS had a higher correlation with graft survival in patients with Tac exposure within the therapeutic range and the correlation was less influenced by mean Tac trough levels. CONCLUSION TVS is a novel measure of Tac IPV with higher correlation with graft survival and more convenience in clinical use than CV after kidney transplantation.
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Affiliation(s)
- Saifu Yin
- Urology Department/Urology research institute/Organ transplantation center, West China Hospital, Sichuan University, Chengdu City, Sichuan Province, China.,West China Medical School, Sichuan University, Chengdu City, Sichuan Province, China
| | - Xianding Wang
- Urology Department/Urology research institute/Organ transplantation center, West China Hospital, Sichuan University, Chengdu City, Sichuan Province, China.,West China Medical School, Sichuan University, Chengdu City, Sichuan Province, China
| | - Zhongli Huang
- Urology Department/Urology research institute/Organ transplantation center, West China Hospital, Sichuan University, Chengdu City, Sichuan Province, China.,West China Medical School, Sichuan University, Chengdu City, Sichuan Province, China
| | - Yu Fan
- Urology Department/Urology research institute/Organ transplantation center, West China Hospital, Sichuan University, Chengdu City, Sichuan Province, China.,West China Medical School, Sichuan University, Chengdu City, Sichuan Province, China
| | - Turun Song
- Urology Department/Urology research institute/Organ transplantation center, West China Hospital, Sichuan University, Chengdu City, Sichuan Province, China.,West China Medical School, Sichuan University, Chengdu City, Sichuan Province, China
| | - Tao Lin
- Urology Department/Urology research institute/Organ transplantation center, West China Hospital, Sichuan University, Chengdu City, Sichuan Province, China.,West China Medical School, Sichuan University, Chengdu City, Sichuan Province, China
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10
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Prytuła A. Tacrolimus exposure and intra-patient variability in paediatric and young adult kidney transplant recipients: one size does not fit all. Transpl Int 2020; 33:1648-1649. [PMID: 32964497 DOI: 10.1111/tri.13750] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 09/15/2020] [Indexed: 11/29/2022]
Affiliation(s)
- Agnieszka Prytuła
- Department of Pediatric Nephrology and Rheumatology, Ghent University Hospital, Ghent, Belgium
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11
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Gold A, Tönshoff B, Döhler B, Süsal C. Association of graft survival with tacrolimus exposure and late intra-patient tacrolimus variability in pediatric and young adult renal transplant recipients-an international CTS registry analysis. Transpl Int 2020; 33:1681-1692. [PMID: 32881096 DOI: 10.1111/tri.13726] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 06/30/2020] [Accepted: 08/24/2020] [Indexed: 01/03/2023]
Abstract
Adolescent and young adult age is a high-risk window with an alarmingly increased likelihood of premature kidney graft loss due to immunological rejection. Using the large database of the Collaborative Transplant Study, we analyzed whether a more intense and less variable exposure to tacrolimus could counteract this young age-related enhanced immunoreactivity. Kidney graft recipients aged 12-23 years (n = 964) with a 1-year tacrolimus trough level between 4.0 and 10.9 ng/ml had a 5-year graft survival rate of 85.1%, significantly better than the poor 66.1% rate in patients with a trough level below 4.0 ng/ml who showed a 2.38-fold increased risk of graft loss in the multivariable analysis (P < 0.001). This association was not apparent in young children aged 0-11 years (n = 455) and less pronounced in adults aged 24-34 years (n = 1466). However, an intra-patient variability of tacrolimus (IPV) trough level ≥1.5 at post-transplant years 1 and 2 was associated with an increased graft loss risk in both 12- to 23-year-old and 0- to 11-year-old recipients (P < 0.001 and P = 0.045). Patients with high IPV made up as many as 30% of kidney graft recipients, indicating that a more intense and less variable exposure to tacrolimus could improve graft survival strongly in this high-risk group.
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Affiliation(s)
- Annika Gold
- Department of Pediatrics I, University Children's Hospital Heidelberg, Heidelberg, Germany
| | - Burkhard Tönshoff
- Department of Pediatrics I, University Children's Hospital Heidelberg, Heidelberg, Germany
| | - Bernd Döhler
- Institute of Immunology, University Hospital Heidelberg, Heidelberg, Germany
| | - Caner Süsal
- Institute of Immunology, University Hospital Heidelberg, Heidelberg, Germany
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12
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Xia T, Wang Y. Coronavirus disease 2019 and transplantation: The combination of lopinavir/ritonavir and hydroxychloroquine is responsible for excessive tacrolimus trough level and unfavorable outcome. Am J Transplant 2020; 20:2630-2631. [PMID: 32400965 PMCID: PMC7273014 DOI: 10.1111/ajt.15992] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/05/2020] [Accepted: 05/07/2020] [Indexed: 01/25/2023]
Affiliation(s)
- Tian Xia
- Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Yanfeng Wang
- Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China,Correspondence Yanfeng Wang
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13
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Gao Y, Yang H, Wang Y, Tian J, Li R, Zhou X. Evaluation of the inhibitory effect of tacrolimus combined with mycophenolate mofetil on mesangial cell proliferation based on the cell cycle. Int J Mol Med 2020; 46:1582-1592. [PMID: 32945359 PMCID: PMC7447332 DOI: 10.3892/ijmm.2020.4696] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 07/13/2020] [Indexed: 12/17/2022] Open
Abstract
The inhibition of mesangial cell proliferation has become an important therapy for the prevention of glomerular proliferation‑associated diseases. The combined application of immunosuppressants with multiple targets presents a novel direction in the treatment of kidney diseases. The present study was designed to explore the inhibitory effects of tacrolimus (TAC) combined with mycophenolate mofetil (MMF) on the proliferation of mesangial cells based on the cell cycle. In vitro, the levels of the proliferation index markers, Ki67 and cyclin D1, in human mesangial cells (HMCs) were determined by immunofluorescence staining and western blot analysis, respectively. In mice with lupus nephritis (LN), the proliferation of mesangial cells was determined using PAS and Masson's trichrome staining, while immunohistochemistry was used to detect Ki67 and western blot analysis was employed for the evaluation of cyclin D1 levels. The expression of platelet‑derived growth factor (PDGF), a proliferation‑associated protein, was estimated using immunohistochemistry and western blot analysis. In patients with LN, Ki67, cyclin D1 and PDGF expression was estimated by immunohistochemistry. The transforming growth factor‑β1/Smad pathway influenced by TAC and the p38 pathway influenced by MMF were also examined by western blot analysis. The results suggested that the combination of TAC and MMF at half the concentration based on the cell cycle was more effective than monotherapy in inhibiting mesangial cell proliferation in vitro and in vivo. TAC inhibited HMC proliferation by affecting the Smad2 signaling pathway. MMF inhibited HMC proliferation by affecting the p38 signaling pathway. Combined treatment with TAC and MMF significantly improved the clinical indexes of patients with LN without severe adverse effects. On the whole, the findings of the present study validate and reinforce the potential use of the combination of TAC and MMF for the treatment of mesangial proliferative diseases.
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Affiliation(s)
- Yanfang Gao
- Department of Nephrology, The Affiliated People's Hospital of Shanxi Medical University, Shanxi Provincial People's Hospital, Shanxi Kidney Disease Institute, Taiyuan, Shanxi 030001, P.R. China
| | - Hui Yang
- Department of Nephrology, The Affiliated People's Hospital of Shanxi Medical University, Shanxi Provincial People's Hospital, Shanxi Kidney Disease Institute, Taiyuan, Shanxi 030001, P.R. China
| | - Yanhong Wang
- Department of Microbiology and Immunology, Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
| | - Jihua Tian
- Department of Microbiology and Immunology, Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
| | - Rongshan Li
- Department of Nephrology, The Affiliated People's Hospital of Shanxi Medical University, Shanxi Provincial People's Hospital, Shanxi Kidney Disease Institute, Taiyuan, Shanxi 030001, P.R. China
| | - Xiaoshuang Zhou
- Department of Nephrology, The Affiliated People's Hospital of Shanxi Medical University, Shanxi Provincial People's Hospital, Shanxi Kidney Disease Institute, Taiyuan, Shanxi 030001, P.R. China
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14
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Defining a threshold for tacrolimus intra-patient variability associated with late acute cellular rejection in paediatric kidney transplant recipients. Pediatr Nephrol 2019; 34:2557-2562. [PMID: 31520127 DOI: 10.1007/s00467-019-04346-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 07/02/2019] [Accepted: 08/26/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND Late acute cellular rejection (LACR) is associated with poorer graft outcomes and non-adherence. Non-adherence to tacrolimus can be indirectly assessed by the intra-patient variability (IPV) of tacrolimus trough levels. The threshold of IPV associated with rejection is not known. METHODS We conducted a case-control study comparing 25 patients with biopsy-proven LACR against 25 stable controls matched for age group, primary diagnosis and time post-transplant. IPV was calculated using coefficient of variance (CV) and mean absolute deviation (MAD) using tacrolimus levels in the preceding 12 months. We also assessed the percentage time for tacrolimus levels < 4 μg/L (Tac < 4) and the concentration/weight-adjusted dose (C/D) ratio as a proxy marker of tacrolimus metaboliser status. RESULTS LACR patients had higher CV (median, IQR 44%, 36-61% v. 24%, 19-35%, p < 0.0001) and higher MAD (33%, 25-48% v. 19%, 15-26%, p < 0.0001). The MAD was less affected by outlying tacrolimus results. Receiver operating curve analysis of the MAD resulted in a sensitivity of 76% and specificity of 76% at a threshold of 26% (AUC 0.85, p < 0.05). LACR patients had more Tac < 4 (50% v. 26%, p < 0.05). There was no difference in C/D suggesting that good IPV can be maintained in fast metabolisers. Patients with LACR had significantly increased creatinine at 12-month follow-up despite treatment (108 v. 5 umol/L increase from baseline) and four patients lost their allograft. CONCLUSIONS Monitoring of tacrolimus IPV using the MAD may be a clinical marker for LACR. A threshold IPV of 26% can potentially be used as a therapeutic target pending further validation studies.
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15
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Medina-Aymerich L, González-Ramírez R, García-Roca P, Reyes H, Hernández AM, Medeiros M, Castañeda-Hernández G. Limited sampling strategy to predict the area under the curve of tacrolimus in Mexican renal transplant pediatric patients receiving Prograf ® or non-innovator formulations. Pediatr Transplant 2019; 23:e13595. [PMID: 31571392 DOI: 10.1111/petr.13595] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 08/20/2019] [Accepted: 09/06/2019] [Indexed: 02/06/2023]
Abstract
TDM of tacrolimus is usually performed with trough levels (C0h ). However, in pediatric patients, C0h may not be an adequate marker. The AUC is considered a more suitable indicator of drug exposure. As several blood samples are needed for the estimation of AUC, and LSS for predicting tacrolimus AUC and optimizing the dose adjustment have been proposed. Moreover, in emerging countries such as Mexico, non-innovator formulations, which bioequivalence has not been demonstrated, are frequently used. Hence, the aim of this study was to develop and validate a LSS to predict the tacrolimus AUC0-12h in Mexican pediatric kidney transplant recipients who received either Prograf® or non-innovator tacrolimus formulations. A total of 56 pharmacokinetic profiles were randomized into two groups: model development (n = 28) and model validation (n = 28). The limited sampling equations were obtained after a stepwise multiple regression using AUC as the dependent variable and tacrolimus blood concentrations, quantified by CMIA, at different time points as the independent variables. The final equation included observed concentrations at 1 hour (C1h ) and 4 hours (C4h ) after dose administration. The predictive performance of the model was adequate in terms of both, bias and precision. Results strongly suggest that the clinical use of this LSS could provide an ethical, cost-, and time-effective method in the TDM of tacrolimus in pediatric patients with kidney transplant. The model proved to be adequate with either Prograf® or non-innovator tacrolimus formulations of dubious bioequivalence.
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Affiliation(s)
- Lorena Medina-Aymerich
- Departamento de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México, Mexico.,Unidad de Investigación y Diagnóstico en Nefrología y Metabolismo Mineral Óseo, Hospital Infantil de México Federico Gómez, Ciudad de México, Mexico
| | - Rodrigo González-Ramírez
- Departamento de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Pilar García-Roca
- Unidad de Investigación y Diagnóstico en Nefrología y Metabolismo Mineral Óseo, Hospital Infantil de México Federico Gómez, Ciudad de México, Mexico
| | - Herlinda Reyes
- Laboratorio Central, Hospital Infantil de México Federico Gómez, Ciudad de México, Mexico
| | - Ana María Hernández
- Unidad de Investigación y Diagnóstico en Nefrología y Metabolismo Mineral Óseo, Hospital Infantil de México Federico Gómez, Ciudad de México, Mexico
| | - Mara Medeiros
- Unidad de Investigación y Diagnóstico en Nefrología y Metabolismo Mineral Óseo, Hospital Infantil de México Federico Gómez, Ciudad de México, Mexico.,Departamento de Farmacología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Gilberto Castañeda-Hernández
- Departamento de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México, Mexico
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16
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CYP3A5 and CYP3A7 genetic polymorphisms affect tacrolimus concentration in pediatric patients with nephrotic range proteinuria. Eur J Clin Pharmacol 2019; 75:1533-1540. [DOI: 10.1007/s00228-019-02726-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 07/17/2019] [Indexed: 01/02/2023]
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17
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Prytuła A, Cransberg K, Raes A. Drug-metabolizing enzymes CYP3A as a link between tacrolimus and vitamin D in renal transplant recipients: is it relevant in clinical practice? Pediatr Nephrol 2019; 34:1201-1210. [PMID: 30058048 DOI: 10.1007/s00467-018-4030-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 07/10/2018] [Accepted: 07/20/2018] [Indexed: 01/08/2023]
Abstract
CYP3A enzymes are involved in the metabolism of calcineurin inhibitor tacrolimus as well as vitamin D. In this review, we summarize the clinical aspects of CYP3A-mediated metabolism of tacrolimus and vitamin D with emphasis on the influence of single-nucleotide polymorphisms on tacrolimus disposition. We describe the utility of 4β hydroxycholesterol as a marker of CYP3A activity. Then, we discuss the possible interaction between calcineurin inhibitors and vitamin D in solid organ transplant recipients. Also, we review other mechanisms which may contribute to side effects of calcineurin inhibitors on bone. Lastly, suggestions for future research and clinical perspectives are discussed.
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Affiliation(s)
- Agnieszka Prytuła
- Paediatric Nephrology and Rheumatology Department, Ghent University Hospital, C Heymanslaan 10, 9000, Ghent, Belgium.
| | - Karlien Cransberg
- Paediatric Nephrology Department, Erasmus MC- Sophia Children's Hospital, Rotterdam, the Netherlands
| | - Ann Raes
- Paediatric Nephrology and Rheumatology Department, Ghent University Hospital, C Heymanslaan 10, 9000, Ghent, Belgium.,Safepedrug Unit, Ghent, Belgium
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18
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Defrancq C, De Wilde N, Raes A, Van Biervliet S, Vande Velde S, Van Winckel M, De Bruyne R, Prytuła A. Intra-patient variability in tacrolimus exposure in pediatric liver transplant recipients: Evolution, risk factors, and impact on patient outcomes. Pediatr Transplant 2019; 23:e13388. [PMID: 30916883 DOI: 10.1111/petr.13388] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 01/09/2019] [Accepted: 02/14/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND This study aims to investigate the evolution and factors associated with TAC IPV and its impact on patient outcomes in pediatric LT recipients. METHODS This is a retrospective study including 41 children. The TAC IPV was expressed as the coefficient of variation and was calculated for years 1-5 following LT. The number of missed clinic appointments was used as a surrogate marker for therapy adherence. RESULTS We identified a decrease in the TAC IPV during the first 3 years after LT (P < 0.01). Serum albumin in the first year (P = 0.03), hematocrit (P = 0.02) and total bilirubin (P = 0.04) in the third year, and therapy adherence (P < 0.01) in the fifth year were associated with TAC IPV. High TAC IPV was associated with biopsy-proven acute allograft rejection (P = 0.04) and the need for biopsy during the first year (P = 0.02). There was a borderline association between TAC IPV and donor-specific antibodies (P = 0.08) and CMV viremia (P = 0.07). High TAC IPV was a predictor of need for liver biopsy and AR with an odds ratio of 1.04 (95% CI 1.0-1.1; P = 0.03) and 1.04 (95% CI 1.0-1.1; P = 0.05), respectively. CONCLUSIONS Our results highlight the impact of biological factors on TAC IPV during the early LT follow-up and later also therapy adherence. High TAC IPV may be associated with adverse patient outcomes.
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Affiliation(s)
- Charlotte Defrancq
- Department of Pediatric Nephrology and Rheumatology, Ghent University Hospital, Ghent, Belgium
| | - Nika De Wilde
- Department of Pediatric Nephrology and Rheumatology, Ghent University Hospital, Ghent, Belgium
| | - Ann Raes
- Department of Pediatric Nephrology and Rheumatology, Ghent University Hospital, Ghent, Belgium.,Safepedrug Consortium
| | - Stephanie Van Biervliet
- Department of Pediatric Gastroenterology, Hepatology and Nutrition, Ghent University Hospital, Ghent, Belgium
| | - Saskia Vande Velde
- Department of Pediatric Gastroenterology, Hepatology and Nutrition, Ghent University Hospital, Ghent, Belgium
| | - Myriam Van Winckel
- Department of Pediatric Gastroenterology, Hepatology and Nutrition, Ghent University Hospital, Ghent, Belgium
| | - Ruth De Bruyne
- Department of Pediatric Gastroenterology, Hepatology and Nutrition, Ghent University Hospital, Ghent, Belgium
| | - Agnieszka Prytuła
- Department of Pediatric Nephrology and Rheumatology, Ghent University Hospital, Ghent, Belgium
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