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Chaturvedi S, Ullah S, Hughes Wagadagam JT. Kidney transplantation access and outcomes for Aboriginal and Torres Strait Islander children and young adults, 1963-2020: an ANZDATA registry study. Med J Aust 2024; 221:47-54. [PMID: 38946656 DOI: 10.5694/mja2.52355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Accepted: 05/08/2024] [Indexed: 07/02/2024]
Abstract
OBJECTIVES To assess differences between Aboriginal and Torres Strait Islander and non-Indigenous Australian children and young adults in access to and outcomes of kidney transplantation. STUDY DESIGN A cohort study based on prospectively collected data; analysis of Australia and New Zealand Dialysis and Transplant Registry (ANZDATA) data. SETTING, PARTICIPANTS Children and young adults aged 0-24 years who commenced kidney replacement therapy in Australia during 1963-2020. MAIN OUTCOME MEASURES Proportions of children and young adults who received kidney transplants within five years of commencing dialysis; 5- and 10-year death-censored graft survival; and 5- and 10-year survival of children and young adults who received kidney transplants or who remained on dialysis. RESULTS During 1963-2020, 3736 children and young adults received kidney replacement therapy in Australia: 213 (5.8%) Aboriginal and Torres Strait Islander and 3523 (94.2%) non-Indigenous children and young adults. During follow-up (median, eight years; interquartile range [IQR], 2.6-15 years), 2762 children and young adults received kidney transplants: 93 Aboriginal and Torres Strait Islander (43.7% of those receiving kidney replacement therapy) and 2669 non-Indigenous children and young adults (75.8%). Smaller proportions of Aboriginal and Torres Strait Islander than of non-Indigenous children and young adults received transplants within five years of commencing dialysis (99, 46% v 2924, 83.0%), received living donor transplants (19, 20% v 1170, 43.9%), or underwent pre-emptive transplantation (one, 1.1% v 363, 13.6%). Five-year graft survival for Aboriginal and Torres Strait Islander recipients was similar to non-Indigenous recipients (61% v 75%; adjusted hazard ratio [aHR], 1.43; 95% confidence interval [CI], 0.02-2.05), but 10-year graft survival was lower (35% v 61%; aHR, 1.69; 95% CI, 1.25-2.28). Five- and 10-year survival after kidney transplantation was similar for Aboriginal and Torres Strait Islander and non-Indigenous people. Among those who remained on dialysis, 10-year survival was poorer for Aboriginal and Torres Strait Islander than non-Indigenous children and young adults (aHR, 1.50; 95% CI, 1.08-2.10). CONCLUSIONS Five-year graft and recipient survival were excellent for Aboriginal and Torres Strait Islander children and young adults who received kidney transplants; however, a lower proportion received transplants within five years of dialysis initiation, than non-Indigenous children and young adults. Improving transplant access within five years of dialysis commencement should be a priority.
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Affiliation(s)
- Swasti Chaturvedi
- Sydney Children's Hospital, Sydney, NSW
- College of Medicine and Public Health, Flinders University, Adelaide, SA
| | - Shahid Ullah
- College of Medicine and Public Health, Flinders University, Adelaide, SA
| | - Jaquelyne T Hughes Wagadagam
- Flinders Health and Medical Research Institute, College of Medicine and Public Health, Flinders University, Darwin, NT
- Royal Darwin Hospital, Darwin, NT
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Mahajan RG, Evans M, Kizilbash S. Kidney transplant outcomes in children with simultaneous versus sequential heart-kidney transplants. Pediatr Nephrol 2024:10.1007/s00467-024-06412-7. [PMID: 38822859 DOI: 10.1007/s00467-024-06412-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 05/09/2024] [Accepted: 05/12/2024] [Indexed: 06/03/2024]
Abstract
BACKGROUND Heart transplant recipients frequently require kidney transplantation for concomitant advanced chronic kidney disease. Data on simultaneous (heart and kidney transplants performed simultaneously) versus sequential (heart transplant performed before kidney) heart-kidney transplants in children are limited. Herein, we compare kidney transplant outcomes between the two groups. METHOD We used the Scientific Registry of Transplant Recipients to identify all pediatric (age <21 years) heart transplant recipients who also received a kidney transplant within 10 years of the heart transplant. We divided the study cohort into simultaneous heart-kidney and sequential heart-kidney recipients. We compared patient and death-censored graft survival using the Cox regression, adjusting for age at kidney transplant, sex, race, pre-transplant dialysis, donor type, and prior kidney transplant. We evaluated delayed graft function (defined as dialysis within the first week posttransplant) using logistic regression. RESULTS Our analysis cohort included 165 recipients (86 simultaneous and 79 sequential). The incidence of delayed graft function was higher in simultaneous recipients (22.4 vs. 7.7%, p=0.017), but the difference lost statistical significance on multivariable analysis. We found no difference in patient survival (aHR 0.97; 95% CI 0.39, 2.41; p=0.95) after kidney transplant but higher death-censored kidney graft survival in sequential heart-kidney recipients compared with simultaneous heart-kidney recipients (aHR 4.26; 95% CI 1.21, 14.9; p=0.02). CONCLUSION Sequential heart-kidney transplants are associated with higher death-censored kidney allograft survival in children compared with simultaneous heart-kidney transplants.
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Affiliation(s)
- Ruchi Gupta Mahajan
- University of Minnesota Medical Center Fairview: M Health Fairview University of Minnesota Medical Center, Minneapolis, USA.
| | - Michael Evans
- CTSI: University of Minnesota Twin Cities Clinical and Translational Science Institute, Minneapolis, USA
| | - Sarah Kizilbash
- University of Minnesota Medical Center Fairview: M Health Fairview University of Minnesota Medical Center, Minneapolis, USA
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3
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Charnaya O, Van Arendonk K, Segev D. Strategies for choosing the best living donor: A review of the literature and a proposal of a decision-making paradigm. Pediatr Transplant 2024; 28:e14779. [PMID: 38766997 PMCID: PMC11107570 DOI: 10.1111/petr.14779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 03/31/2024] [Accepted: 04/24/2024] [Indexed: 05/22/2024]
Abstract
Transplantation remains the gold-standard treatment for pediatric end-stage kidney disease. While living donor transplant is the preferred option for most pediatric patients, it is not the right choice for all. For those who have the option to choose between deceased donor and living donor transplantation, or from among multiple potential living donors, the transplant clinician must weigh multiple dynamic factors to identify the most optimal donor. This review will cover the key considerations when choosing between potential living donors and will propose a decision-making algorithm.
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Affiliation(s)
- Olga Charnaya
- Department of Pediatrics, Johns Hopkins University School of Medicine
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4
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Ratviset P, Panombualert S, Chathum K, Wisanuyotin S. Outcomes of pediatric deceased donor kidney transplant in northeast Thailand. Pediatr Transplant 2024; 28:e14411. [PMID: 37294688 DOI: 10.1111/petr.14411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 08/27/2022] [Accepted: 09/30/2022] [Indexed: 06/11/2023]
Abstract
BACKGROUND Kidney transplantation (KT) is the best therapy in children with end-stage renal disease (ESRD), however, improving long-term graft survival remains challenging. The aim of this study was to determine graft survival and potential risk factors in pediatric patients who undergo deceased donor KT with a steroid-based regimen. METHODS The medical records of children who underwent their first deceased donor KT in Srinagarind Hospital (Khon Kaen, Thailand) between 2001 and 2020 were reviewed. RESULTS Seventy-two patients were studied. Male adolescents were the predominant recipients and the majority of donors were young adult males. Non-glomerular disease, particularly hypoplastic/dysplastic kidney disease, was the major cause of ESRD (48.61%). The mean cold ischemic time (CIT) was 18.29 ± 5.29 h. Most of the recipients had more than 4 human leukocyte antigen (HLA) mismatched loci with positive HLA-DR mismatch (52.78%). Induction therapy was administered in 76.74% of recipients. Tacrolimus plus mycophenolate sodium and prednisolone was the most common immunosuppressive maintenance regimen (69.44%). Graft failure occurred in 18 patients, mostly due to graft rejection (50%). Graft survival at 1, 3, and 5 years after KT were 94.40%, 86.25%, and 74.92%, respectively. The only significant risk factor of graft failure in this study was delayed graft function (DGF) (adjusted HR = 3.55; 95%CI: 1.14, 11.12; p = .029). Patient survival at 1, 3, and 5 years was 100%, 98.48%, and 96.19%, respectively. CONCLUSION The short-term outcomes of pediatric KT from deceased donors were satisfactory; however, prevention of DGF would result in better outcomes.
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Affiliation(s)
- Preeyapat Ratviset
- Department of Pediatrics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Sunee Panombualert
- Department of Pediatrics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Kannika Chathum
- Outpatient Department, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Suwannee Wisanuyotin
- Department of Pediatrics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
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5
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Duneton C, Hogan J. [From the first kidney transplants to the current pediatric kidney transplant]. Med Sci (Paris) 2023; 39:281-286. [PMID: 36943126 DOI: 10.1051/medsci/2023035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023] Open
Abstract
Kidney transplantation is the preferred treatment for end-stage renal failure in children but remains a rare procedure with only 100 to 120 pediatric kidney transplants per year in France. Although the main principles of kidney transplantation are the same in children and adults, some specificities regarding underlying kidney diseases, surgical technique, immunosuppressive drugs metabolism and the risk of infectious complications require a specific expertise to care for these patients. Similarly, the major morbidity of dialysis in children and the need for repeated transplants during the patient's life justify pediatric specificities in the choice of donors and the allocation of grafts in most kidney allocation systems worldwide. The objectives of this review are to present the history and specificities of pediatric kidney transplantation, to describe the current activity in France and to discuss future developments while emphasizing the need for basic and clinical research focused on the pediatric population.
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Affiliation(s)
- Charlotte Duneton
- Service de néphrologie, dialyse et transplantation rénale pédiatrique, Hôpital Robert Debré, AP-HP, Paris, France - Université Paris Cité, Inserm U976, Paris, France
| | - Julien Hogan
- Service de néphrologie, dialyse et transplantation rénale pédiatrique, Hôpital Robert Debré, AP-HP, Paris, France - Université Paris Cité, Paris Translational Research Center for Organ Transplantation, Inserm UMR-S970, Paris, France
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6
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Seeking Standardized Definitions for HLA-incompatible Kidney Transplants: A Systematic Review. Transplantation 2023; 107:231-253. [PMID: 35915547 DOI: 10.1097/tp.0000000000004262] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND There is no standard definition for "HLA incompatible" transplants. For the first time, we systematically assessed how HLA incompatibility was defined in contemporary peer-reviewed publications and its prognostic implication to transplant outcomes. METHODS We combined 2 independent searches of MEDLINE, EMBASE, and the Cochrane Library from 2015 to 2019. Content-expert reviewers screened for original research on outcomes of HLA-incompatible transplants (defined as allele or molecular mismatch and solid-phase or cell-based assays). We ascertained the completeness of reporting on a predefined set of variables assessing HLA incompatibility, therapies, and outcomes. Given significant heterogeneity, we conducted narrative synthesis and assessed risk of bias in studies examining the association between death-censored graft failure and HLA incompatibility. RESULTS Of 6656 screened articles, 163 evaluated transplant outcomes by HLA incompatibility. Most articles reported on cytotoxic/flow T-cell crossmatches (n = 98). Molecular genotypes were reported for selected loci at the allele-group level. Sixteen articles reported on epitope compatibility. Pretransplant donor-specific HLA antibodies were often considered (n = 143); yet there was heterogeneity in sample handling, assay procedure, and incomplete reporting on donor-specific HLA antibodies assignment. Induction (n = 129) and maintenance immunosuppression (n = 140) were frequently mentioned but less so rejection treatment (n = 72) and desensitization (n = 70). Studies assessing death-censored graft failure risk by HLA incompatibility were vulnerable to bias in the participant, predictor, and analysis domains. CONCLUSIONS Optimization of transplant outcomes and personalized care depends on accurate HLA compatibility assessment. Reporting on a standard set of variables will help assess generalizability of research, allow knowledge synthesis, and facilitate international collaboration in clinical trials.
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7
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Charnaya O, Jones J, Philogene MC, Chiang PY, Segev DL, Massie AB, Garonzik-Wang J. Eplet mismatches associated with de novo donor-specific HLA antibody in pediatric kidney transplant recipients. Pediatr Nephrol 2021; 36:3971-3979. [PMID: 34100108 PMCID: PMC8602732 DOI: 10.1007/s00467-021-05078-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 02/22/2021] [Accepted: 03/30/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Optimizing amino acid (eplet) histocompatibility at first transplant decreases the risk of de novo donor-specific antibody (dnDSA) development and may improve long-term graft survival in pediatric kidney transplant recipients (KTR). We performed a retrospective analysis of pediatric KTR and their respective donors to identify eplets most commonly associated with dnDSA formation. METHODS Eplet mismatch analysis was performed in a cohort of 125 pediatric KTR-donor pairs (2006-2018). We determined the prevalence of each eplet mismatch and quantified the percentage of exposed patients who developed dnDSA for each mismatched eplet. RESULTS Recipient median age was 14 (IQR 8-17) years with a racial distribution of 42% Black, 48% Caucasian, and 5.6% Middle-Eastern. Median eplet load varied significantly by recipient race, Black 82 (IQR 58-98), White 60 (IQR 44-81) and Other 66 (IQR 61-76), p = 0.002. Forty-four percent of patients developed dnDSA after median 37.1 months. Compared to dnDSA- patients, dnDSA+ patients had higher median eplet load, 64 (IQR 46-83) vs. 77 (IQR 56-98), p = 0.012. The most common target of dnDSA were eplets expressed in HLA-A*11 and A2 in Class I, and HLA-DQ6 and DQA5 in Class II. The most commonly mismatched eplets were not the most likely to result in dnDSA formation. CONCLUSIONS In a racially diverse population, only a subset of eplets was linked to antibody formation. Eplet load alone is not a sufficient surrogate for eplet immunogenicity. These findings illustrate the need to optimize precision in donor selection and allocation to improve long-term graft outcomes. Graphical Abstract A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Olga Charnaya
- Department of Pediatrics, Johns Hopkins University School of Medicine, 200 N Wolfe St, Baltimore, MD, 21287, USA.
| | - June Jones
- Department of Immunogenetics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | | | - Po-Yu Chiang
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Dorry L Segev
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD, USA
| | - Allan B Massie
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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8
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Sypek MP, Davies CE, Le Page AK, Clayton P, Hughes PD, Larkins N, Wong G, Kausman JY, Mackie F. Paediatric deceased donor kidney transplant in Australia: A 30-year review-What have paediatric bonuses achieved and where to from here? Pediatr Transplant 2021; 25:e14019. [PMID: 33942949 DOI: 10.1111/petr.14019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 11/21/2020] [Accepted: 12/14/2020] [Indexed: 02/01/2023]
Abstract
BACKGROUND In this 30-year national review, we describe trends in DD transplantation for paediatric recipients, assess the impact of paediatric allocation bonuses and identify outstanding areas of need for this population. METHODS A retrospective review of all DD kidney only transplants to paediatric recipients (<18 years old) in Australia between 1989 and 2018 was conducted using deidentified extracts from the ANZDATA. RESULTS Of the 1011 kidney only transplants performed in paediatric recipients during the study period, 426 (42%) were from deceased donors. Paediatric candidates on the DD waiting list had consistently higher rates of transplantation and shorter time from dialysis initiation to transplantation compared with adult candidates (median 372 vs 832 days in 2018, for example). Donor characteristics remained more favourable for paediatric recipients, despite a decline in the overall quality of the donor pool. The mean number of HLA antigen mismatches for paediatric recipients of DD transplants increased each decade (2.86 [1989-1998], 3.85 [1999-2008], 4.01 [2009-2018]). Both patient and graft survival have improved for paediatric DD transplant recipients in the most recent era (5-year graft and patient survival 85% vs 65% and 99% vs 94%, respectively, for 2009-2018 vs 1999-2008). CONCLUSIONS The current DD kidney allocation system in Australia provides rapid access to high-quality organs for paediatric recipients, and early graft loss has decreased significantly in recent years; however, additional targeted interventions to address HLA matching may improve long-term outcomes in this population.
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Affiliation(s)
- Matthew P Sypek
- Faculty of Medicine, Dentistry and Health Science, University of Melbourne, Melbourne, Vic, Australia.,Department of Nephrology, Royal Melbourne Hospital, Melbourne, Vic, Australia.,Department of Nephrology, Royal Children's Hospital, Melbourne, Vic, Australia.,Australia and New Zealand Dialysis and Transplant (ANZDATA) Registry, South Australian Health and Medical Research Institute, Adelaide, SA, Australia
| | - Christopher E Davies
- Australia and New Zealand Dialysis and Transplant (ANZDATA) Registry, South Australian Health and Medical Research Institute, Adelaide, SA, Australia.,Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia
| | - Amelia K Le Page
- Department of Nephrology, Monash Children's Hospital, Clayton, Vic, Australia
| | - Philip Clayton
- Australia and New Zealand Dialysis and Transplant (ANZDATA) Registry, South Australian Health and Medical Research Institute, Adelaide, SA, Australia.,Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia.,Central and Northern Adelaide Transplant Service, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Peter D Hughes
- Faculty of Medicine, Dentistry and Health Science, University of Melbourne, Melbourne, Vic, Australia.,Department of Nephrology, Royal Melbourne Hospital, Melbourne, Vic, Australia
| | - Nicholas Larkins
- Faculty of Health and Medical Sciences, Paediatrics, The University of Western Australia, Perth, WA, Australia
| | - Germaine Wong
- School of Public Health, The University of Sydney, Sydney, NSW, Australia.,Centre for Kidney Research, The Children's Hospital at Westmead, Westmead, NSW, Australia
| | - Joshua Y Kausman
- Faculty of Medicine, Dentistry and Health Science, University of Melbourne, Melbourne, Vic, Australia.,Department of Nephrology, Royal Children's Hospital, Melbourne, Vic, Australia
| | - Fiona Mackie
- Department of Nephrology, Sydney Children's Hospital, Randwick, NSW, Australia.,School of Women's and Child Health, U.N.S.W., Sydney, NSW, Australia
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Tambur AR, Kosmoliaptsis V, Claas FHJ, Mannon RB, Nickerson P, Naesens M. Significance of HLA-DQ in kidney transplantation: time to reevaluate human leukocyte antigen matching priorities to improve transplant outcomes? An expert review and recommendations. Kidney Int 2021; 100:1012-1022. [PMID: 34246656 DOI: 10.1016/j.kint.2021.06.026] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/01/2021] [Accepted: 06/07/2021] [Indexed: 12/14/2022]
Abstract
The weight of human leukocyte antigen (HLA) matching in kidney allocation algorithms, especially in the United States, has been devalued in a stepwise manner, supported by the introduction of modern immunosuppression. The intent was further to reduce the observed ethnic/racial disparity, as data emerged associating HLA matching with decreased access to transplantation for African American patients. In recent years, it has been increasingly recognized that a leading cause of graft loss is chronic antibody-mediated rejection, attributed to the development of de novo antibodies against mismatched donor HLA expressed on the graft. These antibodies are most frequently against donor HLA-DQ molecules. Beyond their impact on graft survival, generation of de novo donor-specific HLA antibodies also leads to increased sensitization, as measured by panel-reactive antibody metrics. Consequently, access to transplantation for patients returning to the waitlist in need of a second transplant is compromised. Herein, we address the implications of reduced HLA matching policies in kidney allocation. We highlight the observed diminished outcome data, the significant financial burden, the long-term health consequences, and, more important, the unintended consequences. We further provide recommendations to examine the impact of donor-recipient HLA class II and specifically HLA-DQα1β1 mismatching, focusing on collection of appropriate data, application of creative simulation approaches, and reconsideration of best practices to reduce inequalities while optimizing patient outcomes.
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Affiliation(s)
- Anat R Tambur
- Comprehensive Transplant Center, Northwestern University, Chicago, Illinois, USA.
| | - Vasilis Kosmoliaptsis
- Department of Surgery, University of Cambridge, Cambridge, UK; NIHR Blood and Transplant Research Unit in Organ Donation and Transplantation and NIHR Cambridge Biomedical Research Centre, University of Cambridge, Cambridge, UK
| | - Frans H J Claas
- Department of Immunology, Leiden University Medical Center, Leiden, the Netherlands
| | - Roslyn B Mannon
- Department of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Peter Nickerson
- Department of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Maarten Naesens
- Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium
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Impact of HLA Mismatching on Early Subclinical Inflammation in Low-Immunological-Risk Kidney Transplant Recipients. J Clin Med 2021; 10:jcm10091934. [PMID: 33947168 PMCID: PMC8125522 DOI: 10.3390/jcm10091934] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/20/2021] [Accepted: 04/27/2021] [Indexed: 01/17/2023] Open
Abstract
The impact of human leukocyte antigen (HLA)-mismatching on the early appearance of subclinical inflammation (SCI) in low-immunological-risk kidney transplant (KT) recipients is undetermined. We aimed to assess whether HLA-mismatching (A-B-C-DR-DQ) is a risk factor for early SCI. As part of a clinical trial (Clinicaltrials.gov, number NCT02284464), a total of 105 low-immunological-risk KT patients underwent a protocol biopsy on the third month post-KT. As a result, 54 presented SCI, showing a greater number of total HLA-mismatches (p = 0.008) and worse allograft function compared with the no inflammation group (48.5 ± 13.6 vs. 60 ± 23.4 mL/min; p = 0.003). Multiple logistic regression showed that the only risk factor associated with SCI was the total HLA-mismatch score (OR 1.32, 95%CI 1.06-1.64, p = 0.013) or class II HLA mismatching (OR 1.51; 95%CI 1.04-2.19, p = 0.032) after adjusting for confounder variables (recipient age, delayed graft function, transfusion prior KT, and tacrolimus levels). The ROC curve illustrated that the HLA mismatching of six antigens was the optimal value in terms of sensitivity and specificity for predicting the SCI. Finally, a significantly higher proportion of SCI was seen in patients with >6 vs. ≤6 HLA-mismatches (62.3 vs. 37.7%; p = 0.008). HLA compatibility is an independent risk factor associated with early SCI. Thus, transplant physicians should perhaps be more aware of HLA mismatching to reduce these early harmful lesions.
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11
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do Nascimento Ghizoni Pereira L, Tedesco-Silva H, Koch-Nogueira PC. Acute rejection in pediatric renal transplantation: Retrospective study of epidemiology, risk factors, and impact on renal function. Pediatr Transplant 2021; 25:e13856. [PMID: 32997892 DOI: 10.1111/petr.13856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 05/11/2020] [Accepted: 08/28/2020] [Indexed: 11/29/2022]
Abstract
AR is a major relevant and challenging topic in pediatric kidney transplantation. Our objective was to evaluate cumulative incidence of AR in pediatric kidney transplant patient, risk factors for this outcome, and impact on allograft function and survival. A retrospective cohort including pediatric patients that underwent kidney transplantation between 2011 and 2015 was designed. Risk factors for AR were tested by competing risk analysis. To estimate its impact, graft survival and difference in GFR were evaluated. Two hundred thirty patients were included. As a whole, the incidence of AR episodes was 0.16 (95% CI = 0.12-0.20) per person-year of follow-up. And cumulative incidence of AR was 23% in 1 year and 39% in 5 years. Risk factors for AR were number of MM (SHR 1.36 CI 1.14-1.63 P = .001); ISS with CSA, PRED, and AZA (SHR 2.22 CI 1.14-4.33 P = .018); DGF (SHR 2.49 CI 1.57-3.93 P < .001); CMV infection (SHR 5.52 CI 2.27-11.0 P < .001); and poor adherence (SHR 2.28 CI 1.70-4.66 P < .001). Death-censored graft survival in 1 and 5 years was 92.5% and 72.1%. Risk factors for graft loss were number of MM (HR 1.51 CI 1.07-2.13 P = .01), >12 years (HR 2.66 CI 1.07-6.59 P = .03), and PRA 1%-50% (HR 2.67 CI 1.24-5.73 P = .01). Although occurrence of AR did not influence 5-year graft survival, it negatively impacted GFR. AR was frequent in patients assessed and associated with number of MM, ISS regimen, DGF, CMV infection, and poor adherence, and had deleterious effect on GFR.
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Affiliation(s)
| | - Hélio Tedesco-Silva
- Division of Nephrology, Hospital do Rim, Federal University of São Paulo, São Paulo, Brazil
| | - Paulo Cesar Koch-Nogueira
- Pediatric Nephrology Division, Pediatric Department, Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil
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12
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Oomen L, de Wall LL, Cornelissen EAM, Feitz WFJ, Bootsma-Robroeks CMHHT. Prognostic Factors on Graft Function in Pediatric Kidney Recipients. Transplant Proc 2020; 53:889-896. [PMID: 33257001 DOI: 10.1016/j.transproceed.2020.10.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 08/26/2020] [Accepted: 10/20/2020] [Indexed: 02/05/2023]
Abstract
BACKGROUND Graft survival in pediatric kidney transplant recipients has increased in the last decades. Determining prognostic factors for graft function over time allows the identification of patients at risk for graft loss and could lead to improvement of current guidelines. METHODS Data were collected among pediatric kidney transplant recipients in a single center during the first 5 years after transplantation. Mixed model analysis was used to indicate possible prognostic factors for the loss of graft function. RESULTS A total of 100 pediatric kidney transplant recipients were analyzed. Negative prognostics of graft function are higher donor age and higher recipient age, presence of obstructive uropathology, re-transplant, and occurrence of BK viremia. The negative influence on graft function of both donor age and presence of obstructive uropathology increased over time. In this study, the factors that did not influence graft function over time were the number of HLA mismatches, pre-transplant dialysis, intra-abdominal graft placement, ischemia time, occurrence of acute rejection, presence of lower urinary tract dysfunction, occurrence of urinary tract infections, and infections with cytomegalovirus and Epstein-Barr virus. CONCLUSIONS This study showed that a higher donor age and higher recipient age, presence of obstructive uropathology, a re-transplant, and the occurrence of BK viremia were negative prognostic factors of graft function over time, in the first 5 years after transplant. Graft function was comparable between steroid-sparing regimens (preferable in low-risk patients) and regimens including steroids (for special reasons).
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Affiliation(s)
- Loes Oomen
- Radboudumc Amalia Children's Hospital, Pediatric Urology, Nijmegen, the Netherlands
| | - Liesbeth L de Wall
- Radboudumc Amalia Children's Hospital, Pediatric Urology, Nijmegen, the Netherlands
| | | | - Wout F J Feitz
- Radboudumc Amalia Children's Hospital, Pediatric Urology, Nijmegen, the Netherlands
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Chua A, Cramer C, Moudgil A, Martz K, Smith J, Blydt-Hansen T, Neu A, Dharnidharka VR. Kidney transplant practice patterns and outcome benchmarks over 30 years: The 2018 report of the NAPRTCS. Pediatr Transplant 2019; 23:e13597. [PMID: 31657095 DOI: 10.1111/petr.13597] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 08/25/2019] [Accepted: 09/16/2019] [Indexed: 11/28/2022]
Abstract
The NAPRTCS has collected clinical information on children undergoing renal transplantation since 1987 and now includes information on 12 920 renal transplants in 11 870 patients. Since the first data analysis in 1989, NAPRTCS reports have documented marked improvements in patient and allograft outcomes after pediatric renal transplantation in addition to identifying factors associated with both favorable and poor outcomes. The registry has served to document and influence practice patterns, clinical outcomes, and changing trends in renal transplantation and also provides historical perspective. This report highlights current practices in an era of major changes in DD kidney allocation and continuing steroid minimization. This report presents outcomes of the patients in the NAPRTCS transplant registry up to end of 2017. In particular, an increase in the cumulative incidence of late first AR has occurred in the most recent cohort, while all prior cohorts had a lower cumulative incidence of late first AR.
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Affiliation(s)
- Annabelle Chua
- Division of Pediatric Nephrology, Duke University, Durham, NC, USA
| | - Carl Cramer
- Division of Pediatric Nephrology, Mayo Clinic, Rochester, MN, USA
| | - Asha Moudgil
- Division of Pediatric Nephrology, Children's National Medical Center, Washington, DC, USA
| | | | - Jodi Smith
- Division of Pediatric Nephrology, Seattle Children's Hospital, University of Washington, Seattle, WA, USA
| | - Tom Blydt-Hansen
- Division of Pediatric Nephrology, BC Children's Hospital, Vancouver, BC, Canada
| | - Alicia Neu
- Division of Pediatric Nephrology, Johns Hopkins University, Baltimore, MD, USA
| | - Vikas R Dharnidharka
- Division of Pediatric Nephrology, Hypertension and Pheresis, St. Louis Children's Hospital, Washington University School of Medicine, St. Louis, MO, USA
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