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Quinino RM, Agena F, Modelli de Andrade LG, Furtado M, Chiavegatto Filho ADP, David-Neto E. A Machine Learning Prediction Model for Immediate Graft Function After Deceased Donor Kidney Transplantation. Transplantation 2023; 107:1380-1389. [PMID: 36872507 DOI: 10.1097/tp.0000000000004510] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
Abstract
BACKGROUND After kidney transplantation (KTx), the graft can evolve from excellent immediate graft function (IGF) to total absence of function requiring dialysis. Recipients with IGF do not seem to benefit from using machine perfusion, an expensive procedure, in the long term when compared with cold storage. This study proposes to develop a prediction model for IGF in KTx deceased donor patients using machine learning algorithms. METHODS Unsensitized recipients who received their first KTx deceased donor between January 1, 2010, and December 31, 2019, were classified according to the conduct of renal function after transplantation. Variables related to the donor, recipient, kidney preservation, and immunology were used. The patients were randomly divided into 2 groups: 70% were assigned to the training and 30% to the test group. Popular machine learning algorithms were used: eXtreme Gradient Boosting (XGBoost), Light Gradient Boosting Machine, Gradient Boosting classifier, Logistic Regression, CatBoost classifier, AdaBoost classifier, and Random Forest classifier. Comparative performance analysis on the test dataset was performed using the results of the AUC values, sensitivity, specificity, positive predictive value, negative predictive value, and F1 score. RESULTS Of the 859 patients, 21.7% (n = 186) had IGF. The best predictive performance resulted from the eXtreme Gradient Boosting model (AUC, 0.78; 95% CI, 0.71-0.84; sensitivity, 0.64; specificity, 0.78). Five variables with the highest predictive value were identified. CONCLUSIONS Our results indicated the possibility of creating a model for the prediction of IGF, enhancing the selection of patients who would benefit from an expensive treatment, as in the case of machine perfusion preservation.
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Affiliation(s)
- Raquel M Quinino
- Renal Transplant Service, Hospital das Clinicas, University of São Paulo School of Medicine, São Paulo, Brazil
| | - Fabiana Agena
- Renal Transplant Service, Hospital das Clinicas, University of São Paulo School of Medicine, São Paulo, Brazil
| | | | - Mariane Furtado
- Department of Epidemiology, School of Public Health, University of São Paulo, São Paulo, Brazil
| | | | - Elias David-Neto
- Renal Transplant Service, Hospital das Clinicas, University of São Paulo School of Medicine, São Paulo, Brazil
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Carbonnel M, Cornet N, Revaux A, Favre-Inhofer A, Galio L, Raliou M, Couturier-Tarrade A, Giraud-Delville C, Charpigny G, Gelin V, Dubois O, Hersant B, Bosc R, Coscas R, Vialard F, Chavatte-Palmer P, Richard C, Sandra O, Ayoubi JM. Analysis of blood parameters and molecular endometrial markers during early reperfusion in two ovine models of uterus transplantation. PLoS One 2021; 16:e0251474. [PMID: 34003831 PMCID: PMC8130915 DOI: 10.1371/journal.pone.0251474] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 04/27/2021] [Indexed: 11/30/2022] Open
Abstract
The dissection of the veins is the trickiest step of Uterine transplantation (UTx). Performing the anastomosis of a single uterine vein could bring a therapeutic benefit and simplification of surgery and serve for managing unilateral venous thromboses. The objectives of this project were to evaluate the expression of early markers of ischemia-reperfusion and to compare findings following one or two vein anastomoses. Orthotopic uterine auto-transplantations were performed on an ovine model with anastomosis of either two (group 1) or one utero-ovarian veins (group 2). Blood gases, histology and ischemia- reperfusion markers transcripts (PTGS2, IL6, IL8, SOD2, C3, BAX/BCL2 and TLR4) were analyzed as well as PTGS2 protein expression using Western Blot and fluorescence immunolocalization on endometrial biopsies after 3h of reperfusion. Ten ewes were included in the experimentation, 4 were in group1, 3 in group 2, the others being sham operated controls. No significant differences were observed between the two phenotypes. Based on these results, the anastomosis of one single uterine vein appears to be an approach consistent with short-term graft survival. Further experiments will be needed to confirm the reliability of this approach, especially the long-term follow-up of the uterine graft including its ability to support gestation to term.
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Affiliation(s)
- Marie Carbonnel
- Department of Gynaecology and Obstetrics, Foch Hospital, Suresnes, France
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
- * E-mail:
| | - Nathalie Cornet
- Department of Gynaecology and Obstetrics, Foch Hospital, Suresnes, France
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
| | - Aurélie Revaux
- Department of Gynaecology and Obstetrics, Foch Hospital, Suresnes, France
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France
| | - Angéline Favre-Inhofer
- Department of Gynaecology and Obstetrics, Foch Hospital, Suresnes, France
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
| | - Laurent Galio
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
| | - Mariam Raliou
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
| | - Anne Couturier-Tarrade
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
| | - Corinne Giraud-Delville
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
| | - Gilles Charpigny
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
| | - Valérie Gelin
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
| | - Olivier Dubois
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
| | - Barbara Hersant
- Department of Plastic, Reconstructive, Aesthetic and Maxillofacial Surgery, Henri Mondor Hospital, Créteil, France
| | - Romain Bosc
- Department of Plastic, Reconstructive, Aesthetic and Maxillofacial Surgery, Henri Mondor Hospital, Créteil, France
| | - Raphael Coscas
- Department of Vascular Surgery, Ambroise Paré University Hospital, Boulogne-Billancourt, France
- UMR 1018, Inserm-Paris11 - CESP, Versailles Saint-Quentin-en-Yvelines University, Paris-Saclay University, Boulogne-Billancourt, France
| | - François Vialard
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
| | - Pascale Chavatte-Palmer
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
| | - Christophe Richard
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
| | - Olivier Sandra
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
| | - Jean-Marc Ayoubi
- Department of Gynaecology and Obstetrics, Foch Hospital, Suresnes, France
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France
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Limnell N, Schramko AA. Is Brain-Dead Donor Fluid Therapy With Colloids Associated With Better Kidney Grafts? EXP CLIN TRANSPLANT 2017. [PMID: 28621636 DOI: 10.6002/ect.2016.0288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVES Fluid therapy is required to maintain perfusion to donor organs. Recent reviews on the choices of fluids have emphasized the safety of using crystalloids, as opposed to fluid therapy with colloids, which has been reported to be either unequivocally or potentially harmful in a number of studies on various patient populations. We aimed to analyze whether the type of fluid administered to donors is connected with kidney transplant outcomes. MATERIALS AND METHODS A total of 100 consecutive brain-dead multiorgan donors and their respective 181 kidney recipients were studied retrospectively. Data concerning donor fluid therapy, the characteristics of the donors and the recipients, and outcomes after kidney transplant were extracted from organ retrieval and patient records. Cases with early graft function were compared with cases with delayed graft function. RESULTS Donors had received both crystalloids and colloids in most cases (84%). Fluid therapy with crystalloids alone was more common among the 40 recipients with delayed (30%) than in the 103 recipients with early graft function (11%) (P = .005). Donor age, time on renal replacement therapy before transplant, and donor fluid therapy with crystalloids alone were independent risk factors for delayed graft function in multivariate analysis. CONCLUSIONS Our results suggest that donor fluid therapy including colloids could be beneficial instead of harmful compared with treatment with crystalloids alone. This finding needs to be evaluated in prospective studies.
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Affiliation(s)
- Niko Limnell
- From the University of Helsinki, Helsinki, Finland
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Thölking G, Koch R, Pavenstädt H, Schuette-Nuetgen K, Busch V, Wolters H, Kelsch R, Reuter S, Suwelack B. Antigen-Specific versus Non-Antigen-Specific Immunoadsorption in ABO-Incompatible Renal Transplantation. PLoS One 2015; 10:e0131465. [PMID: 26121389 PMCID: PMC4488147 DOI: 10.1371/journal.pone.0131465] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 06/02/2015] [Indexed: 02/06/2023] Open
Abstract
Introduction ABO-incompatible (ABOi) renal transplantation (RTx) from living donors is an established procedure to expand the donor pool for patients with end stage renal disease. Immunoadsorption (IA) is a standard procedure for the removal of preformed antibodies against the allograft. In this study, antigen-specific and non-antigen-specific IA in ABOi RTx were compared. Patients and Methods 10 patients underwent antigen-specific IA (Glycosorb group) and 13 patients non-antigen-specific IA (Immunosorba group). The effects of both procedures regarding antibody reduction, number of treatments, complications, costs, as well as the allograft function and patient survival were compared between both groups. Results Although the IgG levels were reduced equally by both procedures (p=0.82), the reduction of the IgM level was more effective in the Glycosorb group (p=0.0172). Patients in both groups required a median number of 6 IA before ABOi RTx. Allograft function at one year after AB0i RTx was similar in both groups (estimated glomerular filtration rate: 66 vs. 64 ml/min/1.73m² respectively), with a death-censored graft survival of 90.0% and 92.3% respectively. Complication rates did not differ between procedures. Due to the reuse of non-antigen-specific Immunosorba columns, costs were considerably lower in this group; however, the use of the Immunosorba-based IA was less time-efficient. Conclusion Considering upcoming alternatives as simultaneous performance of dialysis and IA or a possible reuse of Glycosorb columns, this might become less relevant in the future.
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Affiliation(s)
- Gerold Thölking
- Department of Medicine D, Division of General Internal Medicine, Nephrology and Rheumatology, University Hospital of Münster, Münster, Germany
- * E-mail:
| | - Raphael Koch
- Institute of Biostatistics and Clinical Research, University of Münster, Münster, Germany
| | - Hermann Pavenstädt
- Department of Medicine D, Division of General Internal Medicine, Nephrology and Rheumatology, University Hospital of Münster, Münster, Germany
| | - Katharina Schuette-Nuetgen
- Department of Medicine D, Division of General Internal Medicine, Nephrology and Rheumatology, University Hospital of Münster, Münster, Germany
| | - Veit Busch
- Department of Medicine D, Division of General Internal Medicine, Nephrology and Rheumatology, University Hospital of Münster, Münster, Germany
| | - Heiner Wolters
- Department of General Surgery, University Hospital of Münster, Münster, Germany
| | - Reinhard Kelsch
- Institute of Transfusion Medicine and Transplantation Immunology, University Hospital of Münster, Münster, Germany
| | - Stefan Reuter
- Department of Medicine D, Division of General Internal Medicine, Nephrology and Rheumatology, University Hospital of Münster, Münster, Germany
| | - Barbara Suwelack
- Department of Medicine D, Division of General Internal Medicine, Nephrology and Rheumatology, University Hospital of Münster, Münster, Germany
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Watz E, Remberger M, Ringden O, Lundahl J, Ljungman P, Mattsson J, Wikman A, Uhlin M. Analysis of donor and recipient ABO incompatibility and antibody-associated complications after allogeneic stem cell transplantation with reduced-intensity conditioning. Biol Blood Marrow Transplant 2013; 20:264-71. [PMID: 24274982 DOI: 10.1016/j.bbmt.2013.11.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Accepted: 11/13/2013] [Indexed: 10/26/2022]
Abstract
Allogeneic hematopoietic stem cell transplantation (HSCT) can be performed across the ABO blood group barrier. The impact of ABO incompatibility on clinical outcome is controversial. A retrospective analysis of 310 patients who underwent HSCT with reduced-intensity conditioning between 1998 and 2011 was performed to investigate the frequency and clinical implications of anti-RBC antibodies in passenger lymphocyte syndrome (PLS) after minor ABO mismatch (mm), persistent or recurring recipient type ABO antibodies (PRABO) after major ABO mm HSCT, and autoimmune hemolytic anemia (AIHA). Transplantation characteristics and clinical outcome were analyzed by univariate and multivariate analysis for groups with or without anti-RBC antibodies. ABO blood group incompatibility did not affect clinical outcome despite an increased requirement of blood transfusion. Twelve patients with AIHA, 6 patients with PLS, and 12 patients with PRABO post-HSCT were identified. AIHA did not affect overall survival (OS) or transplant-related mortality (TRM), but patients with AIHA had a lower incidence of grades II to IV acute graft-versus-host disease (P = .05). OS in the PLS group was 0% compared with 61% in the whole group receiving minor ABO mm transplants (P < .001). Comparing PRABO patients with those receiving a major ABO mm HSCT, the OS was 17% versus 73% (P = .002) and TRM was 50% versus 21% (P = .03). At our center, PLS after minor ABO mm and PRABO antibodies after major ABO mm HSCT are significant risk factors for decreased OS and TRM. Our results suggest that occurrence of unexpected ABO antibodies after HSCT warrant a wider investigation individual to find the underlying cause.
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Affiliation(s)
- Emma Watz
- Therapeutic Immunology Unit, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden; Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden.
| | - Mats Remberger
- Therapeutic Immunology Unit, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden; Centre for Allogeneic Stem Cell Transplantation, Karolinska University Hospital, Stockholm, Sweden
| | - Olle Ringden
- Therapeutic Immunology Unit, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden; Centre for Allogeneic Stem Cell Transplantation, Karolinska University Hospital, Stockholm, Sweden
| | - Joachim Lundahl
- Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Per Ljungman
- Department of Hematology, Karolinska University Hospital and Division of Hematology, Department of Medicine, Huddinge, Karolinska Institutet, Stockholm, Sweden
| | - Jonas Mattsson
- Therapeutic Immunology Unit, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden; Centre for Allogeneic Stem Cell Transplantation, Karolinska University Hospital, Stockholm, Sweden
| | - Agneta Wikman
- Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden; Division of Clinical Immunology and Transfusion Medicine, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Michael Uhlin
- Therapeutic Immunology Unit, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden; Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden; Centre for Allogeneic Stem Cell Transplantation, Karolinska University Hospital, Stockholm, Sweden
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Ge F, Gong W. Body weight difference between donor and recipient is an important affector of early graft function after renal transplantation. Transplant Proc 2013; 45:2171-5. [PMID: 23731895 DOI: 10.1016/j.transproceed.2012.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2012] [Accepted: 12/03/2012] [Indexed: 10/26/2022]
Abstract
BACKGROUND Poor early graft function (EGF), a frequent complication of kidney transplantation, can be caused by many risk factors, including donor kidney and body weights. METHODS We studied the relationship to early graft function in a rat kidney transplantation model among 3 indices: ratio of graft to body weight; ratio of native kidney to body weight, and weight difference/body weight of the recipient. We categorized 2 groups based on contralateral nephrectomy at day 1 (G1) or day 3 (G2) after transplantation. EGF was evaluated by measuring serum creatinine levels at day 1 after bilateral nephrectomy. RESULTS The 3 indices, ie, weight difference/body weight of recipient (G1 and G2: P < .0001), ratio of native kidney to body weight (G1: P < .0001; G2: P = .0013), and ratio of graft to body weight (G1: P = .0064; G2: P = .014) strongly correlated with EGF regardless of the time of contralateral nephrectomy. CONCLUSIONS The index of weight difference/body weight of recipient sensitively and predominantly influenced EGF, which probably reflects the systemic metabolic profile.
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Affiliation(s)
- F Ge
- Department of General Surgery, Transplant Laboratory, 2(nd) Affiliated Hospital of School of Medicine, Zhejiang University, Hangzhou City, China
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Outcomes following renal transplantation after multiorgan retrieval versus kidney-only retrieval in donation after cardiac death donors. Transplant Proc 2011; 42:3963-5. [PMID: 21168600 DOI: 10.1016/j.transproceed.2010.09.145] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2010] [Revised: 09/14/2010] [Accepted: 09/29/2010] [Indexed: 01/27/2023]
Abstract
With the increase of donation after cardiac death (DCD) now including procurements for not only kidney but also liver, pancreas, and lung transplantations, we analyze whether multiorgan DCD retrievals have a negative impact on immediate and short-term renal transplant outcomes due to increased length of time of explantation of the kidney from the donor and the associated risks of re-warming. We performed a retrospective study of all DCD donors from 2002 to 2009 at a single unit. Immediate and short-term outcomes between kidney-only versus multiorgan retrieval were compared. Cold ischaemia was significant between the two groups (P = .04), but all other variables were nonsignificant. The results show that immediate graft function, rates of acute rejection and graft/recipient survival are comparable when DCD allografts are procured from both multiorgan and kidney-only donors. The comparable outcomes from kidney-only and multiorgan donations in this study may be due to by the highly selective use of donors for multiorgan DCD donation. This selectivity may explain the "better" quality of kidney for these cases in which patients were able to tolerate potentially injurious rewarming.
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Osband AJ, Zaki RF. Extraction time of kidneys during organ procurement impacts function. Clin Transplant 2011; 25:235-8. [DOI: 10.1111/j.1399-0012.2010.01233.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Wranning CA, Dahm-Kähler P, Mölne J, Nilsson UA, Enskog A, Brännström M. Transplantation of the uterus in the sheep: oxidative stress and reperfusion injury after short-time cold storage. Fertil Steril 2008; 90:817-26. [PMID: 17904131 DOI: 10.1016/j.fertnstert.2007.07.1340] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2007] [Revised: 07/08/2007] [Accepted: 07/08/2007] [Indexed: 10/22/2022]
Abstract
OBJECTIVE To study the effects of cold ischemia and reperfusion after transplantation of the sheep uterus and to compare the preservation solution Perfadex (Vitrolife, Mölndal, Sweden) with Ringer's acetate. DESIGN Experimental animal study. SETTING University hospital. ANIMAL(S) Adult, female sheep. INTERVENTION(S) One uterine horn with the common uterine cavity and cervix of sexually mature ewes was auto-transplanted after 1 hour of cold ischemic storage in either Perfadex (n = 5) or Ringer's acetate (n = 5). During 3 hours of reperfusion, uterine venous blood was collected and analyzed for several parameters that were indicative of oxidative stress and reperfusion injury. A biopsy was taken for histological analysis at the end of the experiment. MAIN OUTCOME MEASURE(S) Lipid peroxidation and ascorbyl radicals in uterine venous blood during reperfusion. Light microscopy and quantification of neutrophils in tissue after 3 hours of reperfusion. RESULT(S) A decline in pH and a rise in lactate and pCO(2)-pO(2), as well as an elevation of antioxidant capacity, lipid peroxidation, and intensity of ascorbyl radical electron spin resonance signal, was found that was more prominent after storage in Ringer's acetate. The histological analysis revealed mild inflammation in both study groups. CONCLUSION(S) Short-time cold ischemic storage of the sheep uterus does not induce any severe reperfusion damage, but the use of the protective buffer Perfadex decreases oxidative stress and inflammation when compared with a more simple solution.
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Affiliation(s)
- Caiza A Wranning
- Department of Obstetrics and Gynecology, Sahlgrenska Academy at Göteborg University, Göteborg, Sweden.
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Ollinger R, Kogler P, Biebl M, Sieb M, Sucher R, Bösmüller C, Troppmair J, Mark W, Weiss H, Margreiter R. Protein levels of heme oxygenase-1 during reperfusion in human kidney transplants with delayed graft function. Clin Transplant 2008; 22:418-23. [PMID: 18261117 DOI: 10.1111/j.1399-0012.2008.00800.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
INTRODUCTION Delayed graft function (DGF) as a consequence of ischemia reperfusion injury (IRI) is associated with a decrease in long-term allograft survival. Heme oxygenase-1 (HO-1) is a stress responsive gene that is highly expressed in multiple pathological processes. The aim of our study was to analyze whether HO-1 protein levels in human kidney transplants during IRI correlate with the incidence of DGF. METHODS Kidney biopsies were obtained from 27 kidney allografts at two time points: at the end of cold storage and shortly after reperfusion. Samples were analyzed for HO-1 protein levels by Western blot. RESULTS Heme oxygenase-1 protein levels were significantly higher in post-reperfusion biopsies (39.4 vs. 13.7 arbitrary units, p = 0.001). In pre-reperfusion biopsies no association was observed between HO-1 protein levels and DGF. In post-reperfusion biopsies, higher levels of HO-1 protein were measured in kidneys with DGF (53.7 vs. 36.2 arbitrary units, p = 0.064). DGF kidneys showed a significantly higher increase from pre- to post-reperfusion in HO-1 protein (42.0 vs. 18.7 arbitrary units, p = 0.025). CONCLUSION Heme oxygenase-1 protein levels shortly after allograft reperfusion are closely related with initial graft function. Assessment thereof may be considered a valuable tool to predict DGF.
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Affiliation(s)
- Robert Ollinger
- Department of General and Transplant Surgery, D. Swarovski Research Lab, Medical University Innsbruck, Innsbruck, Austria.
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Schmiedt CW, Schwab MC, Dubielzig RR, Murphy CJ, McAnulty JF. Trophic factor supplemented UW solution reduces intimal hyperplasia in the rat aortic transplant model. Cryobiology 2007; 54:204-11. [PMID: 17336281 DOI: 10.1016/j.cryobiol.2007.01.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2006] [Revised: 01/17/2007] [Accepted: 01/18/2007] [Indexed: 11/18/2022]
Abstract
BACKGROUND Chronic allograft nephropathy (CAN) is associated with delayed graft function, cold ischemic injury, and is an important cause of premature graft loss. A characteristic vascular lesion of CAN is intimal hyperplasia (IH). The goal of this study was to evaluate the effect of cold storage in University of Wisconsin solution supplemented with trophic factors (UW-TF) on IH in rat aortic isograft (IG) and allograft (AG) models. METHODS F344 --> F344 and Lewis --> F344 orthotopic abdominal aortic transplants were performed after 48 h of cold storage in either UW or UW-TF solution with and without immunosuppression. RESULTS Significant reduction in IH was observed when IG were stored in UW-TF solution compared to UW solution. A significant reduction in intimal inflammation was observed in UW-TF stored, nonimmunosuppressed AG. In immunosuppressed recipients, AG stored in UW-TF solution evidenced significantly less IH compared to those stored in UW alone. CONCLUSIONS UW-TF solution decreased IH in both alloindependent and dependent models.
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Affiliation(s)
- Chad W Schmiedt
- Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, 2015 Linden Drive, Madison, WI 57306-1102, USA
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Holden A, Hill A, Jaff MR, Pilmore H. Renal artery stent revascularization with embolic protection in patients with ischemic nephropathy. Kidney Int 2006; 70:948-55. [PMID: 16837918 DOI: 10.1038/sj.ki.5001671] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A prospective analysis of renal artery stent revascularization with distal embolic protection in a high-risk patient population with ischemic nephropathy is presented. A total of 63 patients (median age 70.2 years, range 54-86 years) had significant atherosclerotic stenosis of 83 renal arteries documented on pre-procedural imaging. All patients had baseline chronic renal insufficiency with a documented deterioration in renal function in the 6 months before revascularization. The endovascular technique used in all patients involved primary passage of an embolic filter into the distal main renal artery followed by primary stent deployment with a balloon expandable stainless steel stent. The filter baskets were recaptured and contents submitted for pathological analysis. At 6 months post-intervention, 97% of patients demonstrated stabilization or improvement in renal function. Only 3% of patients had an inexorable decline in renal function, unchanged by the intervention. After a mean follow up of 16.0 months (6-27), 94% of patients demonstrated stabilization or improvement in renal function. One patient suffered an acute post-procedural deterioration in renal function. In total, 60% of the filter baskets contained embolic material. This study confirms the technical feasibility of renal artery stent deployment with adjuvant embolic protection. The excellent results for renal preservation at 6 months post-intervention also suggest that a distal embolic protection device may improve the impact of percutaneous renal revascularization on progressive deterioration in renal function. The postulated mechanism is through the prevention of atheromatous embolization and the embolic yield from the distal filters supports this hypothesis. Patients most likely to receive the greatest benefit are those with mild baseline chronic renal insufficiency and a recent decline in renal function.
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Affiliation(s)
- A Holden
- Department of Radiology, Auckland City Hospital, Park Road, Grafton, Auckland, New Zealand.
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14
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Schlichting CL, Schareck WD, Weis M. Renal ischemia-reperfusion injury: new implications of dendritic cell-endothelial cell interactions. Transplant Proc 2006; 38:670-3. [PMID: 16647440 DOI: 10.1016/j.transproceed.2006.01.059] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
In renal ischemia/reperfusion (I/R) injury endothelial cells are a main target. The disturbance of endothelial cell physiology leads to endothelial swelling and narrowing of the blood vessel lumen. We attribute this effect to impairment of endothelial cell nitric oxide synthase (NOS). NO is significantly reduced in the course of hypoxia causing dysfunction of the vascular smooth muscle tone. Subsequently to an I/R injury, the inflammatory response results in endothelial activation with enhanced dendritic cell (DC) adhesion and migration. Thus, alloreactive leukocytes are recruited to the inflammatory site. Finally, dendritic cell-endothelial cell interactions may play a crucial role in antigen-specific allograft rejection in I/R renal injury. DCs, which activate naïve alloreactive T cells, play a central role in the establishment of alloantigen-specific immunity. In the course of hypoxia rejection is initiated at the activated layer of foreign endothelial cells (EC), which forms an immunogenic barrier for migrating DCs and T cells. Host DCs that bind to postischemic activated ECs invade the allografted tissues, or remain stationary in the subendothelial layer, or transmigrate into lymphoid vessels and secondary lymphoid organs, where they present alloantigens to naïve host T cells. Organ rejection is mediated by host alloreactive T cells, which are activated by donor DCs (direct activation) or host DCs (indirect activation). We hypothesized that DC-EC binding and migration is the first step in the renal I/R injury that mediates allotransplant rejection. We sought to better understand the downstream events of a renal I/R injury by understanding DC binding and migration, thereby seeking new strategies for more specific immunomodulatory interventions. Herein we developed a new allotransplant-rejection model after renal I/R injury.
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Affiliation(s)
- C L Schlichting
- Department of Surgery, Division of Transplantation Surgery, School of Medicine, University Hospital, University Rostock, Rostock, Germany.
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15
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Joosten SA, Sijpkens YWJ, van Kooten C, Paul LC. Chronic renal allograft rejection: Pathophysiologic considerations. Kidney Int 2005; 68:1-13. [PMID: 15954891 DOI: 10.1111/j.1523-1755.2005.00376.x] [Citation(s) in RCA: 148] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Chronic rejection is currently the most prevalent cause of renal transplant failure. Clinically, chronic rejection presents by chronic transplant dysfunction, characterized by a slow loss of function, often in combination with proteinuria and hypertension. The histopathology is not specific in most cases but transplant glomerulopathy and multilayering of the peritubular capillaries are highly characteristic. Several risk factors have been identified such as young recipient age, black race, presensitization, histoincompatability, and acute rejection episodes, especially vascular rejection episodes and rejections that occur late after transplantation. Chronic rejection develops in grafts that undergo intermittent or persistent damage from cellular and humoral responses resulting from indirect recognition of alloantigens. Progression factors such as advanced donor age, renal dysfunction, hypertension, proteinuria, hyperlipidemia, and smoking accelerate deterioration of renal function. At the tissue level, senescence conditioned by ischemia/reperfusion (I/R) may contribute to the development of chronic allograft nephropathy (CAN). The most effective option to prevent renal failure from chronic rejection is to avoid graft injury from both immune and nonimmune mechanism together with nonnephrotoxic maintenance immunosuppression.
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Affiliation(s)
- Simone A Joosten
- Department of Nephrology, Leiden University Medical Center, Leiden, The Netherlands
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