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1.
Am J Transplant ; 24(7): 1247-1256, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38360185

RESUMO

The time to arrest donors after circulatory death is unpredictable and can vary. This leads to variable periods of warm ischemic damage prior to pancreas transplantation. There is little evidence supporting procurement team stand-down times based on donor time to death (TTD). We examined what impact TTD had on pancreas graft outcomes following donors after circulatory death (DCD) simultaneous pancreas-kidney transplantation. Data were extracted from the UK transplant registry from 2014 to 2022. Predictors of graft loss were evaluated using a Cox proportional hazards model. Adjusted restricted cubic spline models were generated to further delineate the relationship between TTD and outcome. Three-hundred-and-seventy-five DCD simultaneous kidney-pancreas transplant recipients were included. Increasing TTD was not associated with graft survival (adjusted hazard ratio HR 0.98, 95% confidence interval 0.68-1.41, P = .901). Increasing asystolic time worsened graft survival (adjusted hazard ratio 2.51, 95% confidence interval 1.16-5.43, P = .020). Restricted cubic spline modeling revealed a nonlinear relationship between asystolic time and graft survival and no relationship between TTD and graft survival. We found no evidence that TTD impacts pancreas graft survival after DCD simultaneous pancreas-kidney transplantation; however, increasing asystolic time was a significant predictor of graft loss. Procurement teams should attempt to minimize asystolic time to optimize pancreas graft survival rather than focus on the duration of TTD.


Assuntos
Rejeição de Enxerto , Sobrevivência de Enxerto , Transplante de Rim , Transplante de Pâncreas , Doadores de Tecidos , Obtenção de Tecidos e Órgãos , Humanos , Transplante de Pâncreas/mortalidade , Transplante de Rim/mortalidade , Masculino , Feminino , Doadores de Tecidos/provisão & distribuição , Pessoa de Meia-Idade , Adulto , Rejeição de Enxerto/etiologia , Rejeição de Enxerto/mortalidade , Seguimentos , Fatores de Risco , Prognóstico , Fatores de Tempo , Sistema de Registros , Falência Renal Crônica/cirurgia , Taxa de Sobrevida , Tempo para o Tratamento/estatística & dados numéricos , Transplantados/estatística & dados numéricos , Estudos Retrospectivos , Taxa de Filtração Glomerular
2.
Am J Transplant ; 24(8): 1473-1485, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38499089

RESUMO

In the United States, potential transplant candidates with insulin-dependent diabetes mellitus are inconsistently offered pancreas transplantation (PTx), contributing to a dramatic decline in pancreas allograft utilization over the past 2 decades. The American Society of Transplantation organized a workshop to identify barriers inhibiting PTx and to develop strategies for a national comeback. The 2-day workshop focused on 4 main topics: (1) referral/candidate selection, (2) organ recovery/utilization, (3) program performance/patient outcomes, and (4) enhanced education/research. Topics were explored through expert presentations, patient testimonials, breakout sessions, and strategic planning, including the identification of tasks for immediate focus. Additionally, a modified-Delphi survey was conducted among workshop members to develop and rate the importance of barriers, and the impact and feasibility of workgroup-identified improvement strategies. The panelists identified 16 barriers to progress and 44 strategies for consideration. The steps for a national comeback in PTx involve greater emphasis on efficient referral and candidate selection, better donor pancreas utilization practices, eliminating financial barriers to procurement and transplant, improving collaboration between transplant and diabetes societies and professionals, and increasing focus on PTx training, education, and research. Partnership between national societies, patient advocacy groups, and professionals will be essential to realizing this critical agenda.


Assuntos
Transplante de Pâncreas , Humanos , Estados Unidos , Técnica Delphi , Obtenção de Tecidos e Órgãos , Doadores de Tecidos/provisão & distribuição , Diabetes Mellitus Tipo 1/cirurgia
3.
Am J Transplant ; 2024 Jul 31.
Artigo em Inglês | MEDLINE | ID: mdl-39094952

RESUMO

Patients with type 1 diabetes and concurrent subcutaneous insulin resistance present unique diagnostic and therapeutic challenges for clinicians. The standard therapeutic approach is the administration of intravenous insulin. Pancreatic transplantation should be considered at an appropriate time, particularly in the event of life-threatening ketoacidosis, hyperglycemia, hypoglycemia, catheter-associated thrombosis, and infections. We present the case of a 24-year-old woman with type 1 diabetes since early childhood and increasingly uncontrollable subcutaneous and intramuscular insulin resistance. Furthermore, we present the diagnostic pathway and therapeutic interventions performed, culminating in pancreatic transplantation as a curative approach. Immediate graft function resulted in optimal glycemic control.

4.
Am J Transplant ; 24(6): 1035-1045, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38158189

RESUMO

The diabetic population is witnessing a rise in obesity rates, creating specific hurdles for individuals seeking pancreas transplantation because they are frequently disqualified due to their elevated body weight. Introducing a robotic-assisted approach to transplantation has been proven to yield improved outcomes, particularly in patients with obesity. A retrospective analysis was conducted between January 2015 and September 2023. The study included a total of 140 patients, with 16 receiving robotic-assisted simultaneous pancreas-kidney transplantation (RSPK) and 124 undergoing open approach simultaneous pancreas-kidney transplantation (OSPK) during the study period. The median age was 45 (36.8-52.7) and 44.5 years (36.8-51.8) (RSPK vs OSPK, P = .487). There were no significant differences in demographics except body mass index (RSPK vs OSPK, 34.9 vs 28.1, P < .001) and a higher percentage of patients with high cardiac risk in the RSPK group. The robotic approach has a lengthier overall operative time and warm ischemia time. Surgical and nonsurgical complications at 30-days and 1-year grafts and patient survival (93.8% vs 96.8%, RSPK vs OSPK, P = .521) were similar. Our findings suggest that employing robotic assistance in simultaneous pancreas-kidney transplantation is safe. Wider adoption and utilization of this technique could potentially improve transplant accessibility for individuals with obesity and diabetes.


Assuntos
Sobrevivência de Enxerto , Transplante de Rim , Transplante de Pâncreas , Procedimentos Cirúrgicos Robóticos , Humanos , Transplante de Rim/métodos , Estudos Retrospectivos , Transplante de Pâncreas/métodos , Masculino , Feminino , Pessoa de Meia-Idade , Adulto , Procedimentos Cirúrgicos Robóticos/métodos , Seguimentos , Prognóstico , Complicações Pós-Operatórias , Fatores de Risco , Testes de Função Renal , Falência Renal Crônica/cirurgia
5.
Am J Transplant ; 24(3): 362-379, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-37871799

RESUMO

The Banff pancreas working schema for diagnosis and grading of rejection is widely used for treatment guidance and risk stratification in centers that perform pancreas allograft biopsies. Since the last update, various studies have provided additional insight regarding the application of the schema and enhanced our understanding of additional clinicopathologic entities. This update aims to clarify terminology and lesion description for T cell-mediated and antibody-mediated allograft rejections, in both active and chronic forms. In addition, morphologic and immunohistochemical tools are described to help distinguish rejection from nonrejection pathologies. For the first time, a clinicopathologic approach to islet pathology in the early and late posttransplant periods is discussed. This update also includes a discussion and recommendations on the utilization of endoscopic duodenal donor cuff biopsies as surrogates for pancreas biopsies in various clinical settings. Finally, an analysis and recommendations on the use of donor-derived cell-free DNA for monitoring pancreas graft recipients are provided. This multidisciplinary effort assesses the current role of pancreas allograft biopsies and offers practical guidelines that can be helpful to pancreas transplant practitioners as well as experienced pathologists and pathologists in training.


Assuntos
Transplante de Pâncreas , Transplante Homólogo , Biópsia , Isoanticorpos , Linfócitos T
6.
NMR Biomed ; 37(11): e5207, 2024 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-38979683

RESUMO

For patients with type 1 diabetes mellitus complicated by severe hypoglycemia, clinical islet transplantation is an efficacious alternative to whole pancreas transplantation. While islet transplantation has improved over the last few years, there remain questions regarding its cost-effectiveness and donor allosensitization, which is exacerbated when islets from more than one donor are required. Understanding the features of a pancreas that would provide viable islets prior to isolation may lead to development of an accurate assay that could identify suitable pancreases and provide significant cost savings to a clinical islet transplantation program. In this pilot study, solid-state high-resolution magic angle spinning (HRMAS) nuclear magnetic resonance (NMR) spectroscopy was used to assess samples of convenience of human pancreatic tissue taken prior to islet isolation both before and after incubation using the two-layer perfluorocarbon (PFC)/University of Wisconsin (UW) solution cold-storage method. We observed that, prior to incubation, human pancreatic tissue exhibited evidence of hypoxia with decreased peak integrals associated with glucose and increased peak integrals corresponding to lactate and free fatty acids. After incubation, we observed a reversal of the hypoxia-induced damage, as integrals corresponding to glucose increased, and those corresponding to lactate and free fatty acid resonances decreased. Interestingly, a significant correlation between the ratio of the glucose integral (at 3.0-4.5 ppm) to the sum of the fatty acid (at 0.9 ppm) and lactate + fatty acid (at 1.3 ppm) integrals and glucose responsiveness, a measure of islet viability, of the isolated islets, was observed after incubation in PFC/UW solution for pancreases that responded to PFC/UW solution incubation (p = 0.02). Notably, pancreases with little or no change in the integral ratio after PFC/UW solution incubation had poor recovery. These results suggest that tissue recovery is a key feature for determining islet cell viability, and further that HRMAS NMR may be a practical method to quickly assess human donor pancreatic tissue prior to islet isolation for clinical transplantation.


Assuntos
Ilhotas Pancreáticas , Espectroscopia de Ressonância Magnética , Doadores de Tecidos , Humanos , Ilhotas Pancreáticas/diagnóstico por imagem , Ilhotas Pancreáticas/metabolismo , Pâncreas/diagnóstico por imagem , Sobrevivência Celular , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Separação Celular
7.
J Surg Res ; 298: 149-159, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38608426

RESUMO

INTRODUCTION: Bench surgery for the preparation of deceased donor pancreatic grafts is labor-intensive and time-consuming. We hypothesized that energy devices could be used during bench surgery to decrease the bench surgery time. However, because bench surgery has two unique characteristics, wet conditions and no blood flow in the vessels, it is necessary to verify the safety and efficacy under such conditions. METHODS: In an animal tissue model, we validated both ultrasonic and bipolar energy devices: Harmonic Shears and the LigaSure (LS) vessel-sealing device by evaluating heat spread and pressure resistance under bench surgery conditions. In a clinical evaluation of the LS, we compared the outcomes of 22 patients in two different bench surgery groups: with and without the use of the LS. RESULTS: Clinically, the bench surgery time was significantly shorter in the LS group than that in the conventional group (P < 0.001). In the animal tissue experiments, the highest temperature in bench surgery conditions was 60.4°C after 1 s at a 5-mm distance in the LS group. Pressure resistance of ≥ 750 mmHg was achieved in almost all trials in both veins and arteries, with no difference between Harmonic Shears and LS. There was more surgical smoke visually in bench conditions versus in dry conditions and under half bite versus full bite conditions. CONCLUSIONS: The encouraging results of our exploratory clinical and animal studies of the energy devices suggest that they may be useful in the setting of bench surgery.


Assuntos
Transplante de Pâncreas , Animais , Transplante de Pâncreas/instrumentação , Transplante de Pâncreas/métodos , Transplante de Pâncreas/efeitos adversos , Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Modelos Animais , Suínos , Pâncreas/cirurgia , Pâncreas/irrigação sanguínea
8.
Clin Transplant ; 38(7): e15413, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-39033508

RESUMO

INTRODUCTION: It is unclear whether kidney/pancreas (KP) transplantation will prevent the progression of peripheral arterial disease (PAD) in patients with insulin dependent diabetes (IDDM) and end-stage renal disease. We sought to determine the pre- and posttransplant prevalence of symptomatic PAD and changes in carotid artery intima-media thickness (IMT) in KP recipients. METHODS: In this single center study, outcomes were compared between KP recipients with and without a history of PAD. A subset of recipients underwent pre- and posttransplant IMT measurements. RESULTS: Among the study group (N = 107), 18 (17%) recipients admitted to a pretransplant history of symptomatic PAD, comprised 11 foot infections and 7 amputations (5 minor and 2 major). Baseline characteristics of age, gender, race, years of diabetes, dialysis history, smoking history, years of hypertension, and history of coronary artery disease (CAD) were equivalent between PAD and non-PAD cohorts. At a median follow-up of 60 months (IQR: 28, 110), 16 (15%) KP recipients had suffered a PAD event. In multivariate analysis, a pretransplant history of PAD (hazard ratio [HR] 9.66, p < 0.001) and CAD (HR 3.33, p = 0.04) were independent predictors of posttransplant PAD events. Among a subset of 20 recipients (3 with PAD), mean IMT measurements pretransplant and at a median of 24 (range 18-24) months posttransplant, showed no evidence of disease progression. CONCLUSION: Based on IMT measurements and clinical results, KP transplantation stabilized PAD in most patients, but did not alter outcomes of symptomatic PAD recipients. A pretransplant history of PAD and CAD was an independent predictor of posttransplant PAD events.


Assuntos
Espessura Intima-Media Carotídea , Falência Renal Crônica , Transplante de Rim , Transplante de Pâncreas , Doença Arterial Periférica , Humanos , Feminino , Masculino , Transplante de Pâncreas/efeitos adversos , Doença Arterial Periférica/cirurgia , Doença Arterial Periférica/etiologia , Pessoa de Meia-Idade , Seguimentos , Transplante de Rim/efeitos adversos , Falência Renal Crônica/cirurgia , Fatores de Risco , Prognóstico , Diabetes Mellitus Tipo 1/cirurgia , Diabetes Mellitus Tipo 1/complicações , Adulto , Complicações Pós-Operatórias/epidemiologia , Estudos Retrospectivos , Taxa de Filtração Glomerular , Testes de Função Renal
9.
Clin Transplant ; 38(8): e15386, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-39087488

RESUMO

BACKGROUND: Chronic immunosuppression following pancreas transplantation carries significant risk, including posttransplant lymphoproliferative disease (PTLD). We sought to define the incidence, risk factors, and long-term outcomes of PTLD following pancreas transplantation at a single center. METHODS: All adult pancreas transplants between February 1, 1983 and December 31, 2023 at the University of Minnesota were reviewed, including pancreas transplant alone (PTA), simultaneous pancreas-kidney transplants (SPK), and pancreas after kidney transplants (PAK). RESULTS: Among 2353 transplants, 110 cases of PTLD were identified, with an overall incidence of 4.8%. 17.3% were diagnosed within 1 year of transplant, 32.7% were diagnosed within 5 years, and 74 (67.3%) were diagnosed after 5 years. The overall 30-year incidence of PTLD did not differ by transplant type-7.4% for PTA, 14.2% for SPK, and 19.4% for PAK (p = 0.3). In multivariable analyses, older age and Epstein-Barr virus seronegativity were risk factors for PTLD, and PTLD was a risk factor for patient death. PTLD-specific mortality was 32.7%, although recipients with PTLD had similar median posttransplant survival compared to those without PTLD (14.9 year vs. 15.6 year, p = 0.9). CONCLUSIONS: PTLD following pancreas transplantation is associated with significant mortality. Although the incidence of PTLD has decreased over time, a high index of suspicion for PTLD following PTx should remain in EBV-negative recipients.


Assuntos
Sobrevivência de Enxerto , Transtornos Linfoproliferativos , Transplante de Pâncreas , Complicações Pós-Operatórias , Humanos , Transplante de Pâncreas/efeitos adversos , Masculino , Transtornos Linfoproliferativos/etiologia , Transtornos Linfoproliferativos/epidemiologia , Feminino , Adulto , Complicações Pós-Operatórias/epidemiologia , Complicações Pós-Operatórias/etiologia , Seguimentos , Fatores de Risco , Prognóstico , Pessoa de Meia-Idade , Incidência , Taxa de Sobrevida , Estudos Retrospectivos , Rejeição de Enxerto/etiologia , Rejeição de Enxerto/mortalidade , Transplante de Rim/efeitos adversos , Adulto Jovem
10.
Clin Transplant ; 38(1): e15166, 2024 01.
Artigo em Inglês | MEDLINE | ID: mdl-37848266

RESUMO

BACKGROUND: Appendicitis in pancreatic transplant recipients can be challenging to diagnose and manage. Incidental appendicectomy (IA) during pancreas transplantation obviates the risk of appendicitis but potentially at the cost of increased operating time or early post-operative complications. This study reviewed the value of IA at a single center. METHODS: This was a retrospective study of patients who underwent a pancreas transplant in our unit from January 1st, 2012 to December 31st, 2020, with end of follow-up on May 21st, 2023; recipients were grouped by whether or not an IA was performed during pancreas transplantation. Donor, recipient, operative, and graft outcomes were compared between the two groups. Post-transplant complications related to appendiceal pathology (or IA) were recorded and classified. RESULTS: Two hundred forty-three patients underwent a pancreas transplant; 227 (93%) patients had an appendix in situ at transplantation, and of these 53 (23%) underwent an IA and 174 (77%) did not. There were no statistically significant differences in operative time (p = .06) or hospital stay (p = .50) between the two groups. In the IA cohort, there were no Clavien-Dindo Grade III-V complications relating to the appendicectomy. In those that did not undergo an IA, two patients (1%) subsequently required appendicectomy due to appendicitis. Comparison of pancreatic graft survival showed no statistically significant difference between the groups (p = .44). CONCLUSIONS: This study suggests that IA is effective at reducing risks of post-transplant appendiceal complications without significantly prolonging inpatient stay or impairing graft survival. These data support the consideration of undertaking an IA for all patients undergoing a pancreas transplant.


Assuntos
Apendicite , Transplante de Pâncreas , Humanos , Apendicite/diagnóstico , Apendicite/cirurgia , Apendicite/complicações , Transplante de Pâncreas/efeitos adversos , Estudos Retrospectivos , Apendicectomia/efeitos adversos , Tempo de Internação , Sobrevivência de Enxerto
11.
Clin Transplant ; 38(1): e15212, 2024 01.
Artigo em Inglês | MEDLINE | ID: mdl-38041451

RESUMO

Pancreas transplantation alone (PTA) is a ß cell replacement option for selected patients with type 1 diabetes mellitus; concerns have been raised regarding deterioration in kidney function (KF) after PTA. This retrospective multicenter study assessed actual impact of transplantation and immunosuppression on KF in PTA recipients at three Transplant Centers. The primary composite endpoint 10 years after PTA was >50% eGFR decline, eGFR < 30 mL/min/1.73 m2 , and/or receiving a kidney transplant (KT). Overall, 822 PTA recipients met eligibility. Median baseline and 10-year eGFR (mL/min/1.73 m2 ) were 76.3 (58.1-100.8) and 51.3 (35.3-65.9), respectively. Primary composite endpoint occurred in 98 patients (53.5%) with 45 experiencing a >50% decrease in eGFR by 10 years post-transplant, 38 eGFR < 30 mL/min/1.73 m2 and 49 requiring KT. KF declined most significantly within 6 months post-PTA, more often in females and patients with better preserved GFR up to 5 years with 11.6% kidney failure at 10 years. Patient survival and death-censored graft survival were both 68% at 10 years with overall graft thrombosis rate 8%. KF declined initially after PTA but stabilized with further slow progression. In conclusion, prospective intervention studies are needed to test renal sparing interventions while gathering more granular data.


Assuntos
Diabetes Mellitus Tipo 1 , Transplante de Pâncreas , Feminino , Humanos , Estudos de Coortes , Diabetes Mellitus Tipo 1/cirurgia , Sobrevivência de Enxerto , Rim , Transplante de Pâncreas/efeitos adversos , Estudos Retrospectivos
12.
Clin Transplant ; 38(7): e15392, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38967601

RESUMO

INTRODUCTION: This study examined simultaneous pancreas-kidney transplant (SPKt) in Black and White patients to identify disparities in transplantation, days on the waitlist, and reasons for SPKt waitlist removal. METHODS: Using the United Network for Organ Sharing Standard Transplant Analysis and Research file, patients between January 1, 2009, and May 31, 2021, were included. Three cohorts (overall, SPKt recipients only, and those not transplanted) were selected using propensity score matching. Conditional logistic regression was used for categorical outcomes. Days on the waitlist were compared using negative binomial regression. RESULTS: Black patients had increased odds of receiving a  SPKt (OR, 1.25 [95% CI, 1.11-1.40], p < 0.001). White patients had increased odds of receiving a kidney-only transplant (OR 0.48 [95% CI, 0.38-0.61], p < 0.001), and specifically increased odds of receiving a living donor kidney (OR 0.34 [0.25-0.45], p < 0.001). CONCLUSION: This study found that Black patients are more likely to receive a SPKt. Results suggest that there are opportunities for additional inquiry related to patient removal from the waitlist, particularly considering White patients received or accepted more kidney-only transplants and were more likely to receive a living donor kidney-only transplant.


Assuntos
Transplante de Rim , Transplante de Pâncreas , Listas de Espera , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Negro ou Afro-Americano/estatística & dados numéricos , Seguimentos , Sobrevivência de Enxerto , Disparidades em Assistência à Saúde/estatística & dados numéricos , Falência Renal Crônica/cirurgia , Prognóstico , Estudos Retrospectivos , Fatores de Risco , Obtenção de Tecidos e Órgãos/estatística & dados numéricos , Brancos/estatística & dados numéricos
13.
Transpl Int ; 37: 12682, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39165279

RESUMO

Duodeno-duodenostomy (DD) has been proposed as a more physiological alternative to conventional duodeno-jejunostomy (DJ) for pancreas transplantation. Accessibility of percutaneous biopsies in these grafts has not yet been assessed. We conducted a retrospective study including all pancreatic percutaneous graft biopsies requested between November 2009 and July 2021. Whenever possible, biopsies were performed under ultrasound (US) guidance or computed tomography (CT) guidance when the US approach failed. Patients were classified into two groups according to surgical technique (DJ and DD). Accessibility, success for histological diagnosis and complications were compared. Biopsy was performed in 93/136 (68.4%) patients in the DJ group and 116/132 (87.9%) of the DD group (p = 0.0001). The graft was not accessible for biopsy mainly due to intestinal loop interposition (n = 29 DJ, n = 10 DD). Adequate sample for histological diagnosis was obtained in 86/93 (92.5%) of the DJ group and 102/116 (87.9%) of the DD group (p = 0.2777). One minor complication was noted in the DD group. The retrocolic position of the DD pancreatic graft does not limit access to percutaneous biopsy. This is a safe technique with a high histological diagnostic success rate.


Assuntos
Duodenostomia , Transplante de Pâncreas , Humanos , Estudos Retrospectivos , Masculino , Feminino , Pessoa de Meia-Idade , Transplante de Pâncreas/métodos , Transplante de Pâncreas/efeitos adversos , Adulto , Duodenostomia/métodos , Idoso , Pâncreas/cirurgia , Pâncreas/patologia , Tomografia Computadorizada por Raios X , Biópsia/métodos , Duodeno/cirurgia , Duodeno/patologia
14.
Transpl Int ; 37: 12591, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38694489

RESUMO

Tacrolimus is pivotal in pancreas transplants but poses challenges in maintaining optimal levels due to recipient differences. This study aimed to explore the utility of time spent below the therapeutic range and intrapatient variability in predicting rejection and de novo donor-specific antibody (dnDSA) development in pancreas graft recipients. This retrospective unicentric study included adult pancreas transplant recipients between January 2006 and July 2020. Recorded variables included demographics, immunosuppression details, HLA matching, biopsy results, dnDSA development, and clinical parameters. Statistical analysis included ROC curves, sensitivity, specificity, and predictive values. A total of 131 patients were included. Those with biopsy-proven acute rejection (BPAR, 12.2%) had more time (39.9% ± 24% vs. 25.72% ± 21.57%, p = 0.016) and tests (41.95% ± 13.57% vs. 29.96% ± 17.33%, p = 0.009) below therapeutic range. Specific cutoffs of 31.5% for time and 34% for tests below the therapeutic range showed a high negative predictive value for BPAR (93.98% and 93.1%, respectively). Similarly, patients with more than 34% of tests below the therapeutic range were associated with dnDSA appearance (38.9% vs. 9.4%, p = 0.012; OR 6.135, 1.346-27.78). In pancreas transplantation, maintaining optimal tacrolimus levels is crucial. Suboptimal test percentages below the therapeutic range prove valuable in identifying acute graft rejection risk.


Assuntos
Rejeição de Enxerto , Imunossupressores , Transplante de Pâncreas , Tacrolimo , Humanos , Rejeição de Enxerto/imunologia , Tacrolimo/uso terapêutico , Masculino , Estudos Retrospectivos , Feminino , Adulto , Imunossupressores/uso terapêutico , Pessoa de Meia-Idade , Isoanticorpos/sangue , Isoanticorpos/imunologia , Doadores de Tecidos , Fatores de Tempo , Biópsia , Sobrevivência de Enxerto
15.
Transpl Int ; 37: 12864, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38832357

RESUMO

Simultaneous pancreas-kidney (SPK) transplantation improves quality of life and limits progression of diabetic complications. There is reluctance to accept pancreata from donors with abnormal blood tests, due to concern of inferior outcomes. We investigated whether donor amylase and liver blood tests (markers of visceral ischaemic injury) predict pancreas graft outcome using the UK Transplant Registry (2016-2021). 857 SPK recipients were included (619 following brainstem death, 238 following circulatory death). Peak donor amylase ranged from 8 to 3300 U/L (median = 70), and this had no impact on pancreas graft survival when adjusting for multiple confounders (aHR = 0.944, 95% CI = 0.754-1.81). Peak alanine transaminases also did not influence pancreas graft survival in multivariable models (aHR = 0.967, 95% CI = 0.848-1.102). Restricted cubic splines were used to assess associations between donor blood tests and pancreas graft survival without assuming linear relationships; these confirmed neither amylase, nor transaminases, significantly impact pancreas transplant outcome. This is the largest, most statistically robust study evaluating donor blood tests and transplant outcome. Provided other factors are acceptable, pancreata from donors with mild or moderately raised amylase and transaminases can be accepted with confidence. The use of pancreas grafts from such donors is therefore a safe, immediate, and simple approach to expand the donor pool to reach increasing demands.


Assuntos
Amilases , Sobrevivência de Enxerto , Transplante de Rim , Transplante de Pâncreas , Doadores de Tecidos , Humanos , Feminino , Masculino , Pessoa de Meia-Idade , Adulto , Amilases/sangue , Estudos de Coortes , Alanina Transaminase/sangue , Reino Unido , Testes Hematológicos , Sistema de Registros
16.
Transpl Int ; 37: 12278, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38601276

RESUMO

A public health emergency such as the COVID-19 pandemic has behavioral, mental and physical implications in patients with type 1 diabetes (T1D). To what extent the presence of a transplant further increases this burden is not known. Therefore, we compared T1D patients with an islet or pancreas transplant (ß-cell Tx; n = 51) to control T1D patients (n = 272). Fear of coronavirus infection was higher in those with ß-cell Tx than without (Visual Analogue Scale 5.0 (3.0-7.0) vs. 3.0 (2.0-5.0), p = 0.004) and social isolation behavior was more stringent (45.8% vs. 14.0% reported not leaving the house, p < 0.001). A previous ß-cell Tx was the most important predictor of at-home isolation. Glycemic control worsened in patients with ß-cell Tx, but improved in control patients (ΔHbA1c +1.67 ± 8.74 vs. -1.72 ± 6.15 mmol/mol, p = 0.006; ΔTime-In-Range during continuous glucose monitoring -4.5% (-6.0%-1.5%) vs. +3.0% (-2.0%-6.0%), p = 0.038). Fewer patients with ß-cell Tx reported easier glycemic control during lockdown (10.4% vs. 22.6%, p = 0.015). All T1D patients, regardless of transplantation status, experienced stress (33.4%), anxiety (27.9%), decreased physical activity (42.0%), weight gain (40.5%), and increased insulin requirements (29.7%). In conclusion, T1D patients with ß-cell Tx are increasingly affected by a viral pandemic lockdown with higher fear of infection, more stringent social isolation behavior and deterioration of glycemic control. This trial has been registered in the clinicaltrials.gov registry under identifying number NCT05977205 (URL: https://clinicaltrials.gov/study/NCT05977205).


Assuntos
Diabetes Mellitus Tipo 1 , Células Secretoras de Insulina , Transplante das Ilhotas Pancreáticas , Feminino , Humanos , Masculino , Ansiedade , Glicemia , Automonitorização da Glicemia , Estudos Transversais , Diabetes Mellitus Tipo 1/complicações , Diabetes Mellitus Tipo 1/cirurgia , Controle Glicêmico , Pandemias , Saúde Pública
17.
Transpl Int ; 37: 12235, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38444997

RESUMO

The total burden of infections after transplantation has not been compared in detail between recipients of simultaneous pancreas-kidney transplantation (SPK) and kidney transplantation alone (KTA). We compared infection-related hospitalizations and bacteremias after transplantation during 1- and 5-year follow-up among 162 patients undergoing SPK. The control group consisted of 153 type 1 diabetics undergoing KTA with the inclusion criteria of donor and recipient age < 60, and BMI < 30. During the first year, SPK patients had more infection-related hospitalizations (0.54 vs. 0.31 PPY, IRR 1.76, p = <0.001) and bacteremias (0.11 vs. 0.01 PPY, IRR 17.12, p = <0.001) compared to KTA patients. The first infection-related hospitalizations and bacteremias occurred later during follow-up in KTA patients. SPK was an independent risk factor for infection-related hospitalization and bacteremia during the first year after transplantation, but not during the 5-year follow-up. Patient survival did not differ between groups, however, KTA patients had inferior kidney graft survival. SPK patients are at greater risk for infection-related hospitalizations and bacteremias during the first year after transplantation compared to KTA patients, however, at the end of the follow-up the risk of infection was similar between groups.


Assuntos
Bacteriemia , Transplante de Rim , Humanos , Transplante de Rim/efeitos adversos , Rim , Hospitalização , Pâncreas
18.
Transpl Int ; 37: 13302, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39376730

RESUMO

Duodenal leaks (DL) contribute to most graft losses following pancreas transplantation. However, there is a paucity of literature comparing graft preservation approach versus upfront graft pancreatectomy in these patients. We reviewed all pancreas transplants performed in our institution between 2000 and 2020 and identified the recipients developing DL to compare based on their management: percutaneous drainage vs. operative graft preservation vs. upfront pancreatectomy. Of the 595 patients undergoing pancreas transplantation, 74 (12.4%) developed a duodenal leak with a median follow up of 108 months. Forty-five (61%) were managed by graft preservation strategies, with the rest being treated with upfront graft pancreatectomy. DL managed by graft preservation strategies had similar graft survival rates at 1 and 5-year compared to the matched cohort of population without DL (95% and 59% vs. 91% and 62%; p = 0.78). Multivariate analysis identified male recipient (OR: OR: 6.18; CI95%: 1.26-41.09; p = 0.04) to have higher odds of undergoing an upfront graft pancreatectomy. In appropriately selected recipients with DL, graft preservation strategies utilizing either interventional radiology guided percutaneous drainage or laparotomy with/without repair of leak can achieve comparable long-term graft survival rates compared to recipients without DL.


Assuntos
Drenagem , Sobrevivência de Enxerto , Transplante de Pâncreas , Pancreatectomia , Humanos , Transplante de Pâncreas/efeitos adversos , Transplante de Pâncreas/métodos , Masculino , Feminino , Adulto , Estudos Retrospectivos , Pessoa de Meia-Idade , Pancreatectomia/efeitos adversos , Pancreatectomia/métodos , Fístula Anastomótica/etiologia , Fístula Anastomótica/cirurgia , Fístula Anastomótica/terapia , Duodeno/cirurgia , Complicações Pós-Operatórias/etiologia , Complicações Pós-Operatórias/cirurgia
19.
Pediatr Nephrol ; 39(10): 2875-2885, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-38483593

RESUMO

Multi-organ transplantation involves the transplant of two or more organs from a single donor into a single recipient; in most cases, one of these organs is a kidney. Multi-organ transplantation is uncommon in pediatric transplantation but can be life-saving or significantly life-improving for children with rare diseases, including primary heart, liver, pancreas, or intestinal failure with secondary kidney failure, metabolic disorders, and genetic conditions causing multi-organ dysfunction. This manuscript reviews the current state of pediatric multi-organ transplantation that includes a kidney, with a focus on indications, evaluation, and key differences in management compared to kidney-alone transplantation. Guidelines and consensus statements for pediatric multi-organ transplantation are nonexistent; this review condenses reported statistics and peer-reviewed expert opinion while highlighting areas in need of further research.


Assuntos
Transplante de Rim , Humanos , Criança , Transplante de Rim/efeitos adversos , Transplante de Órgãos/efeitos adversos , Insuficiência de Múltiplos Órgãos/etiologia , Rejeição de Enxerto/prevenção & controle , Rejeição de Enxerto/etiologia , Rejeição de Enxerto/imunologia
20.
World J Surg ; 48(6): 1501-1508, 2024 06.
Artigo em Inglês | MEDLINE | ID: mdl-38682645

RESUMO

BACKGROUND: Pancreas transplantation is the most effective treatment to improve quality of life and overcome complications in patients with end-stage renal disease and diabetes mellitus. One of the main approaches for concurrent renal disease and diabetes mellitus which has been underutilized during the past decade is a pancreas transplant after kidney transplantation. Our study aimed to quantify outcomes following pancreas after kidney transplants (PAKs) in the United States from 2001 to 2020 with an emphasis on graft and patient survival. METHODS AND MATERIALS: A retrospective registry analysis was performed by accessing the OPTN/UNOS database for PAKs that were performed in the United States from January 2001 to April 2020. The study population was divided into two subgroups: patients receiving a pancreas transplant between 2001 and 2010 and those receiving a pancreas transplant between 2011 and 2020. RESULTS: The study examined a total number of 3706 PAK recipients; patients who received a PAK from January 2001 through December 2010 (n = 2892) and those who received a PAK from January 2011 to April 2020 (n = 814). The selection process of transplant recipients did not drastically change throughout the 2001-2010 and 2011-2020 periods. Length of stay at the hospital after the transplantation improved significantly in the 2011-2020 group relative to the 2001-2010 group (8.48 vs. 10.08 days, mean, p < 0.01). Additionally, more transplantation with 4-6 human leukocyte antigen mismatch occurred in the 2011-2020 group than in the 2001-2010 group (80.6% vs. 71.4%, p < 0.01). The pancreas preservation time of 13.35 h in the 2001-2010 group decreased significantly to 11.17 h in the 2011-2020 group (p < 0.001). The mean donor's amylase and lipase also decreased significantly in the 2011-2020 cohort. Significant graft survival improvement was observed in the 2011-2020 group compared to the 2001-2010 group after a long-term follow-up (p < 0.001). The mean Calculated Pancreas Donor Risk Index was 1.08 for the 2001-2010 group and 0.99 for the 2011-2020 group with a significant difference (p < 0.001). CONCLUSION: The beneficial results and improved outcomes observed in PAK patients demonstrate the effectiveness of the operation for individuals in need of a pancreas transplant. PAKs can prove to be a meaningful solution to overcome long waiting times, decrease the donor-recipient imbalance, expand the donor pool, and overcome the current underutilization in order to improve the short- and long-term quality of life in the groups of interest.


Assuntos
Sobrevivência de Enxerto , Transplante de Rim , Transplante de Pâncreas , Humanos , Estudos Retrospectivos , Masculino , Feminino , Pessoa de Meia-Idade , Adulto , Falência Renal Crônica/cirurgia , Estados Unidos , Sistema de Registros , Resultado do Tratamento
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