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Rothem Y, Askenasy E, Siman-Tov M, Davidov Y, Hoffman T, Mor E, Hod T. Elevated hemoglobin levels in renal transplant recipients with polycystic kidney disease versus other etiologies: exploring mechanisms and implications for outcomes. J Nephrol 2024:10.1007/s40620-023-01868-6. [PMID: 38427307 DOI: 10.1007/s40620-023-01868-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 12/14/2023] [Indexed: 03/02/2024]
Abstract
BACKGROUND Autosomal dominant polycystic kidney disease (ADPKD)-related end-stage kidney disease (ESKD) often necessitates transplantation. However, the impact of ADPKD on post-transplant outcomes, specifically hemoglobin levels, remains unknown. METHODS We retrospectively analyzed 513 Kidney Transplant Recipients (KTRs), of whom 81 had ESKD due to ADPKD (20 with pre-transplant native nephrectomy and 61 without). Hemoglobin levels were evaluated at multiple time intervals post-transplant. RESULTS Kidney transplant recipients with ADPKD vs. KTRs with ESKD due to other causes exhibited significantly higher hemoglobin levels in repeated measurement analysis. Multivariable analyses confirmed ADPKD as an independent predictor for elevated hemoglobin levels. In a multivariable logistic regression analysis, the odds for maximum hemoglobin > 15 mg/dL at 3-12 months post-transplant were more than twice as high in ADPKD patients vs. all the other KTRs (Odds Ratio [OR] 2.31, 95% Confidence Interval [CI] 1.3-4.13, p < 0.001). Pre-transplant native nephrectomy revealed a trend toward lower hemoglobin levels. Elevated hemoglobin levels were linked to improved estimated glomerular filtration rate (eGFR) at one year post-transplant. Patient survival was enhanced among KTRs with ADPKD compared to other ESKD causes. CONCLUSIONS Kidney transplant recipients with ADPKD exhibited elevated hemoglobin levels post-transplant, possibly due to prolonged native kidney erythropoietin production. These elevated hemoglobin levels were linked to improved outcomes, including allograft function and patient survival. Future research should further investigate the underlying mechanisms driving favorable ADPKD KTR outcomes.
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Affiliation(s)
- Yael Rothem
- Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
| | - Enosh Askenasy
- Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
- Renal Transplant Center, Sheba Medical Center, Tel Hashomer, Israel
| | - Maya Siman-Tov
- Department of Emergency and Disaster Management, School of Public Health, Tel-Aviv University, Tel Aviv, Israel
| | - Yana Davidov
- Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
- Liver Disease Center, Sheba Medical Center, Tel Hashomer, Israel
| | - Tomer Hoffman
- Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
- Infectious Diseases Unit, Sheba Medical Center, Tel Hashomer, Israel
| | - Eytan Mor
- Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
- Renal Transplant Center, Sheba Medical Center, Tel Hashomer, Israel
| | - Tammy Hod
- Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel.
- Renal Transplant Center, Sheba Medical Center, Tel Hashomer, Israel.
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Drake AM, Paynter JA, Yim A, Tempo JA, Manning TG, Brennan J, Qin KR. Prevalence of Renal Neoplasia in Autosomal Dominant Polycystic Kidney Disease: Systematic Review and Meta-Analysis. Nephron Clin Pract 2024; 148:457-467. [PMID: 38301614 PMCID: PMC11216357 DOI: 10.1159/000536245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 01/08/2024] [Indexed: 02/03/2024] Open
Abstract
BACKGROUND Autosomal dominant polycystic kidney disease (ADPKD) is a common inherited condition; however, its relationship with renal cell carcinoma (RCC) remains unclear. This paper aims to establish the prevalence of RCC and its subtypes amongst ADPKD patients. METHODS A database search was conducted to retrieve studies reporting RCC occurrence within ADPKD patients until July 2023. Key outcomes included number and subtype of RCC cases, and number of RCCs presenting incidentally. A random-effects meta-analysis was performed. RESULTS Our search yielded 569 articles, 16 met the inclusion criteria. Nephrectomy specimens from 1,147 ADPKD patients were identified. Of studies reporting per-kidney results (n = 13), 73 RCCs were detected amongst 1,493 kidneys, equating to a per-kidney prevalence of 4.3% (95% CI, 3.1-5.7, I2 = 15.7%). 75 ADPKD patients were found to have RCC (75/1,147), resulting in a per-person prevalence of 5.7% (95% CI, 3.7-7.9, I2 = 40.3%) (n = 16). As 7 patients had bilateral disease, 82 RCCs were detected in total. Of these, 39 were clear cell RCC, 35 were papillary and 8 were other. As such, papillary RCCs made up 41.1% (95% CI, 25.9-56.9, I2 = 18.1%) of detected cancers. The majority of RCCs were detected incidentally (72.5% [95% CI, 43.7-95.1, I2 = 66.9%]). CONCLUSION ADPKD appears to be associated with the papillary RCC subtype. The clinical implications of these findings are unclear, however, may become apparent as outcomes and life expectancy amongst APDKD patients improve.
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Affiliation(s)
- Anna M. Drake
- School of Rural Health, Monash University, Bendigo, VIC, Australia
| | - Jessica A. Paynter
- School of Rural Health, Monash University, Bendigo, VIC, Australia
- Department of Urology, Bendigo Health, Bendigo, VICAustralia
| | - Arthur Yim
- Department of Urology, Austin Health, Melbourne, VIC, Australia
| | - Jake A. Tempo
- Department of Urology, Austin Health, Melbourne, VIC, Australia
| | - Todd G. Manning
- School of Rural Health, Monash University, Bendigo, VIC, Australia
| | - Janelle Brennan
- School of Rural Health, Monash University, Bendigo, VIC, Australia
- Department of Urology, Bendigo Health, Bendigo, VICAustralia
| | - Kirby R. Qin
- School of Rural Health, Monash University, Bendigo, VIC, Australia
- Department of Urology, Bendigo Health, Bendigo, VICAustralia
- Department of Paediatrics, Monash University, Melbourne, VIC, Australia
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Casteleijn NF, Geertsema P, Koorevaar IW, Inkelaar FD, Jansen MR, Lohuis SJ, Meijer E, Pol RA, Sanders JS, van de Streek PE, Leliveld AM, Gansevoort RT. The Need for Routine Native Nephrectomy in the Workup for Kidney Transplantation in Autosomal Dominant Polycystic Kidney Disease Patients. Urol Int 2023; 107:148-156. [PMID: 35810740 PMCID: PMC9945191 DOI: 10.1159/000525575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 06/14/2022] [Indexed: 11/19/2022]
Abstract
INTRODUCTION There is no consensus if nor when a native nephrectomy should be performed in the workup for kidney transplantation in ADPKD patients. In our PKD Expertise Center, a restrictive approach is pursued in which nephrectomy is performed only in patients with severe complaints, i.e., in case of serious volume-related complaints, lack of space for the allograft, recurrent cyst infections, persistent cyst bleedings, or chronic refractory pain. We analyzed in a retrospective cohort study whether this approach is justified. METHODS All ADPKD patients who received kidney transplantation between January 2000 and January 2019 were reviewed. Patients were subdivided into three groups: no nephrectomy (no-Nx), nephrectomy performed before (pre-Tx), or after kidney transplantation (post-Tx). Simultaneous nephrectomy together with transplantation were not performed in our center. RESULTS 391 patients (54 ± 9 years, 55% male) were included. The majority of patients did not undergo a nephrectomy (n = 257, 65.7%). A nephrectomy was performed pre-Tx in 114 patients (29.2%). After Tx, nephrectomy was performed in only 30 patients (7.7%, median 4.4 years post-Tx). Surgery-related complication rates did not differ between both groups (38.3% pre-Tx vs. 27.0% post-Tx, p = 0.2), nor were there any differences in 10-year patient survival (74.4% pre-Tx vs. 80.7% post-Tx vs. 67.6% no-Nx, p = 0.4), as well as in 10-year death-censored graft survival (84.4% pre-Tx vs. 85.5% post-Tx vs. 90.0% no-Nx, p = 0.9). CONCLUSIONS This study indicates that with a restrictive nephrectomy policy in the workup for kidney transplantation, only a part of ADPKD patients need a native nephrectomy.
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Affiliation(s)
- Niek F. Casteleijn
- Department of Urology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands,*Niek F. Casteleijn,
| | - Paul Geertsema
- Department of Nephrology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Iris W. Koorevaar
- Department of Nephrology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Friso D.J. Inkelaar
- Department of Nephrology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Marnix R. Jansen
- Department of Nephrology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Steven J. Lohuis
- Department of Nephrology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Esther Meijer
- Department of Nephrology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Robert A. Pol
- Department of Surgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Jan-Stephan Sanders
- Department of Nephrology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Peter E. van de Streek
- Department of Nephrology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Anna M. Leliveld
- Department of Urology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Ron T. Gansevoort
- Department of Nephrology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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Prudhomme T, Boissier R, Hevia V, Campi R, Pecoraro A, Breda A, Territo A. Native nephrectomy and arterial embolization of native kidney in autosomal dominant polycystic kidney disease patients: indications, timing and postoperative outcomes. Minerva Urol Nephrol 2023; 75:17-30. [PMID: 36094388 DOI: 10.23736/s2724-6051.22.04972-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
INTRODUCTION Autosomal dominant polycystic kidney disease (ADPKD) is one of the most common causes of a need of renal replacement therapy. The need (elective vs. systematic) and timing of native kidney nephrectomy (before, after or during kidney transplantation) is a matter of debate and alternatives to surgery, mainly transcatheter arterial embolization have been explored. We performed a systematic review to report all available evidence on postintervention outcomes of native nephrectomy and arterial embolization in ADPKD patients. EVIDENCE ACQUISITION A search on Medline, Embase, and Cochrane databases was performed to identify all studies reporting outcomes of native nephrectomy or arterial embolization in APKDs. EVIDENCE SYNTHESIS Concerning native nephrectomy, a total of 3626 patients in 37 studies were included with 735, 210 and 2681 patients who underwent native nephrectomy respectively before, after or during kidney transplantation. Major complications were 12.2% in unilateral nephrectomy before transplantation, 25.0% in bilateral nephrectomy before transplantation, 17.7% in unilateral nephrectomy during transplantation, 20.8% in bilateral nephrectomy during transplantation and 23.8% in unilateral and bilateral nephrectomy after transplantation. A total of 230 patients in 7 series of arterial embolization were included. All arterial embolization were performed before transplantation. Mean volume reduction ranged from 36.3% at 3 months to 49% at 6 months. The major postintervention complication rate was 1%. CONCLUSIONS Unilateral native nephrectomy before kidney transplantation was associated with the lowest major postoperative complication rate and appears to be the preferred strategy. Arterial embolization reduces kidney volume by 49% at 6 months. Arterial embolization could be considered when the reduction in size of the native kidney is not urgent.
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Affiliation(s)
- Thomas Prudhomme
- Department of Urology, Rangueil University Hospital, Toulouse, France -
| | - Romain Boissier
- Department of Urology, La Conception University Hospital, Marseille, France
| | - Vital Hevia
- Department of Urology, University Hospital Ramón y Cajal, Madrid, Spain
| | - Riccardo Campi
- Department of Urology, University Hospital of Florence, Florence, Italy
| | - Alessio Pecoraro
- Department of Urology, University Hospital of Florence, Florence, Italy
| | - Alberto Breda
- Unit of Oncology and Renal Transplant, Puigvert's Foundation, Barcelona, Spain
| | - Angelo Territo
- Unit of Oncology and Renal Transplant, Puigvert's Foundation, Barcelona, Spain
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Rasmussen A, Levine MA, Mandurah MM, Sener A, Luke PP. Staged vs. simultaneous bilateral nephrectomy and kidney transplantation in patients with autosomal dominant polycystic kidney disease: Outcomes and costs. Can Urol Assoc J 2022; 16:424-429. [PMID: 36656695 PMCID: PMC9851214 DOI: 10.5489/cuaj.7816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
INTRODUCTION We sought to compare cost and safety outcomes of patients who received a kidney transplant and bilateral nephrectomy in either a simultaneous or staged approach. METHODS We reviewed all adult patients with autosomal dominant polycystic kidney disease (ADPKD) who received a kidney transplant and underwent bilateral nephrectomy between 2008 and 2019. Patients were divided into two groups: staged (nephrectomy prior to transplant) and simultaneous (nephrectomy at the time of transplant). The primary outcome was cumulative cost of nephrectomy and transplantation ($CAD). We analyzed several secondary outcomes, including 90-day Clavien-Dindo complication rates. RESULTS A total of 114 patients with ADPKD received a kidney transplant over 11 years. Of these, 28 patients underwent both nephrectomy and transplantation (10 staged, 18 simultaneous). More patients in the simultaneous group had a living donor transplant (83% vs. 0%, p<0.001). Creatinine clearance at one year/last followup did not differ between groups (p=0.12). With similar overall complication rates between groups, the transfusion rate was also similar between groups (simultaneous 50% vs. staged 40%, p=0.91). Total cost was lower in the simultaneous group ($23 775.33 CAD vs. $35 048.83 CAD, p<0.001), largely owing to a longer total length of stay in the staged group as compared to the simultaneous group (8.1 vs. 14.5 days, p<0.001). CONCLUSIONS These data suggest that a simultaneous approach to bilateral nephrectomy and kidney transplantation provides potential cost savings with no adverse outcomes. This provides a rationale to investigate simultaneous nephrectomy and transplantation in the deceased donor setting.
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Affiliation(s)
- Andrew Rasmussen
- Division of Urology, University of Alberta, Edmonton, AB, Canada
| | - Max A. Levine
- Division of Urology, University of Alberta, Edmonton, AB, Canada
| | - Moaath M. Mandurah
- Department of Surgery, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
| | - Alp Sener
- Multi-Organ Transplant Program and Division of Urology, London Health Sciences Centre, Western University, London, ON, Canada
| | - Patrick P. Luke
- Multi-Organ Transplant Program and Division of Urology, London Health Sciences Centre, Western University, London, ON, Canada
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Tsai TY, Chen CH, Wu MJ, Tsai SF. Outcomes of Kidney Transplantation in Patients with Autosomal Dominant Polycystic Kidney Disease: Our Experience Based on 35-Years Follow-Up. Diagnostics (Basel) 2022; 12:diagnostics12051174. [PMID: 35626329 PMCID: PMC9139921 DOI: 10.3390/diagnostics12051174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/21/2022] [Accepted: 05/07/2022] [Indexed: 02/05/2023] Open
Abstract
Background and objectives: For patients with end-stage renal disease (ESRD), the best replacement therapy is renal transplant (RTx) to ensure life with good quality. Autosomal dominant polycystic kidney disease (ADPKD) is a genetic disorder and a common cause of ESRD. Different from ESRD of other causes, ADPKD patients need careful pre-RTx evaluations like detecting the presence of intracranial aneurisms, cardiac manifestations, and complications of liver and renal cysts. Materials: We retrieved a total of 1327 RTx patients receiving 1382 times RTx (two recipients with three times, 48 recipients with two times) over the last 35 years. Only 41 of these patients were diagnosed with ADPKD. Results: At the first RTx, patients’ ages were 42.9 ± 12.6 (mean ± SD) years. Ages of the ADPKD group (52.5 ± 10.1 years) were older than the non-ADPKD group (42.7 ± 12.7 years, p = 0.001). We found more cell mediated and antibody mediated rejection (29.3% vs. 26.0%, and 22.0% vs. 7.0%; both p < 0.001), new onset diabetes after transplant (NODAT) (21, 51.2% vs. 326, 25.3%; p = 0.005), and worse graft survival (p < 0.001) in the ADPKD group, and with the development of more malignancies (18; 43.9% vs. 360; 28.0%; p = 0.041). The long-term patient survivals were poorer in the ADPKD group (38.9% vs. 70.3%; p = 0.018). ADPKD was found as an independent risk factor for long-term patient survival (HR = 2.64, 95% CI 1.03−6.76, p = 0.04). Conclusions: Patients with ADPKD-related ESRD developed more NODAT, and also more malignancies if not aggressively surveyed before surgery. Due to poor long-term graft and patient survivals, regular careful examinations for NODAT and malignancies, even in the absence of related symptoms and signs, are highly recommended in the follow-ups.
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Affiliation(s)
- Tsung-Yin Tsai
- Division of Nephrology, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung 40705, Taiwan; (T.-Y.T.); (C.-H.C.); (M.-J.W.)
| | - Cheng-Hsu Chen
- Division of Nephrology, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung 40705, Taiwan; (T.-Y.T.); (C.-H.C.); (M.-J.W.)
- Department of Life Science, Tunghai University, Taichung 40704, Taiwan
- Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung 40227, Taiwan
| | - Ming-Ju Wu
- Division of Nephrology, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung 40705, Taiwan; (T.-Y.T.); (C.-H.C.); (M.-J.W.)
- Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung 40227, Taiwan
| | - Shang-Feng Tsai
- Division of Nephrology, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung 40705, Taiwan; (T.-Y.T.); (C.-H.C.); (M.-J.W.)
- Department of Life Science, Tunghai University, Taichung 40704, Taiwan
- Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung 40227, Taiwan
- School of Medicine, National Yang-Ming University, Taipei 11265, Taiwan
- Correspondence: ; Tel.: +886-4-23592525 (ext. 3030); Fax: +886-4-23594980
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Chalklin CG, Koimtzis G, Ablorsu E. Hand-assisted laparoscopic bilateral native nephrectomy for autosomal dominant polycystic kidney disease post-renal transplant. Int J Urol 2022; 29:907-908. [PMID: 35470481 DOI: 10.1111/iju.14906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 04/05/2022] [Indexed: 11/26/2022]
Affiliation(s)
| | - Georgios Koimtzis
- Cardiff Transplant Unit, University Hospital of Wales, Cardiff and Vale University Health Board, Cardiff, UK
| | - Elijah Ablorsu
- Cardiff Transplant Unit, University Hospital of Wales, Cardiff and Vale University Health Board, Cardiff, UK
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Bellini MI, Nozdrin M, Pengel L, Knight S, Papalois V. The Impact of Recipient Demographics on Outcomes from Living Donor Kidneys: Systematic Review and Meta-Analysis. J Clin Med 2021; 10:jcm10235556. [PMID: 34884257 PMCID: PMC8658296 DOI: 10.3390/jcm10235556] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 11/18/2021] [Accepted: 11/22/2021] [Indexed: 11/21/2022] Open
Abstract
Background and Aims: Recipient demographics affect outcomes after kidney transplantation. The aim of this study was to assess, for kidneys retrieved from living donors, the effect of recipient sex, ethnicity, and body mass index (BMI) on delayed graft function (DGF) and one-year graft function, incidence of acute rejection (AR), and recipient and graft survivals. Methods: A systematic review and meta-analysis was performed. EMBASE and MEDLINE databases were searched using algorithms through Ovid. Web of Science collection, BIOSIS, CABI, Korean Journal database, Russian Science Citation Index, and SciELO were searched through Web of Science. Cochrane database was also searched. Risk of bias was assessed using the NHBLI tools. Data analysis was performed using Revman 5.4. Mean difference (MD) and risk ratio (RR) were used in analysis. Results: A total of 5129 studies were identified; 24 studies met the inclusion criteria and were analysed. Female recipients were found to have a significantly lower serum creatinine 1-year-post renal transplantation (MD: −0.24 mg/dL 95%CI: −0.18 to −0.29 p < 0.01) compared to male recipients. No significant difference in survival between male and female recipients nor between Caucasians and Africans was observed (p = 0.08). However, Caucasian recipients had a higher 1-year graft survival compared to African recipients (95% CI 0.52−0.98) with also a lower incidence of DGF (RR = 0.63 p < 0.01) and AR (RR = 0.55 p < 0.01). Recipient obesity (BMI > 30) was found to have no effect on 1-year recipient (p = 0.28) and graft survival (p = 0.93) compared to non-obese recipients although non-obese recipients had a lower rate of DGF (RR = 0.65 p < 0.01) and AR (RR = 0.81 p < 0.01) compared to obese recipients. Conclusions: Gender mismatch between male recipients and female donors has negative impact on graft survival. African ethnicity and obesity do not to influence recipient and graft survival but negatively affect DGF and AR rates.
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Affiliation(s)
- Maria Irene Bellini
- Department of Emergency Medicine and Surgery, Azienda Ospedaliera San Camillo Forlanini, 00152 Rome, Italy
- Department of Surgical Sciences, Sapienza University of Rome, 00161 Rome, Italy
- Correspondence:
| | | | - Liset Pengel
- Centre for Evidence in Transplantation, Nuffield Department of Surgical Sciences, University of Oxford, Oxford OX3 7HE, UK; (L.P.); (S.K.)
| | - Simon Knight
- Centre for Evidence in Transplantation, Nuffield Department of Surgical Sciences, University of Oxford, Oxford OX3 7HE, UK; (L.P.); (S.K.)
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Bellini MI, Courtney AE, McCaughan JA. Living Donor Kidney Transplantation Improves Graft and Recipient Survival in Patients with Multiple Kidney Transplants. J Clin Med 2020; 9:jcm9072118. [PMID: 32635614 PMCID: PMC7408952 DOI: 10.3390/jcm9072118] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/01/2020] [Accepted: 07/02/2020] [Indexed: 12/14/2022] Open
Abstract
Background: Failed kidney transplant recipients benefit from a new graft as the general incident dialysis population, although additional challenges in the management of these patients are often limiting the long-term outcomes. Previously failed grafts, a long history of comorbidities, side effects of long-term immunosuppression and previous surgical interventions are common characteristics in the repeated kidney transplantation population, leading to significant complex immunological and technical aspects and often compromising the short- and long-term results. Although recipients’ factors are acknowledged to represent one of the main determinants for graft and patient survival, there is increasing interest in expanding the donor’s pool safely, particularly for high-risk candidates. The role of living kidney donation in this peculiar context of repeated kidney transplantation has not been assessed thoroughly. The aim of the present study is to analyse the effects of a high-quality graft, such as the one retrieved from living kidney donors, in the repeated kidney transplant population context. Methods: Retrospective analysis of the outcomes of the repeated kidney transplant population at our institution from 1968 to 2019. Data were extracted from a prospectively maintained database and stratified according to the number of transplants: 1st, 2nd or 3rd+. The main outcomes were graft and patient survivals, recorded from time of transplant to graft failure (return to dialysis) and censored at patient death with a functioning graft. Duration of renal replacement therapy was expressed as cumulative time per month. A multivariate analysis considering death-censored graft survival, decade of transplantation, recipient age, donor age, living donor, transplant number, ischaemic time, time on renal replacement therapy prior to transplant and HLA mismatch at HLA-A, -B and -DR was conducted. In the multivariate analysis of recipient survival, diabetic nephropathy as primary renal disease was also included. Results: A total of 2395 kidney transplant recipients were analysed: 2062 (83.8%) with the 1st kidney transplant, 279 (11.3%) with the 2nd graft, 46 (2.2%) with the 3rd+. Mean age of 1st kidney transplant recipients was 43.6 ± 16.3 years, versus 39.9 ± 14.4 for 2nd and 41.4 ± 11.5 for 3rd+ (p < 0.001). Aside from being younger, repeated kidney transplant patients were also more often males (p = 0.006), with a longer time spent on renal replacement therapy (p < 0.0001) and a higher degree of sensitisation, expressed as calculated reaction frequency (p < 0.001). There was also an association between multiple kidney transplants and better HLA match at transplantation (p < 0.0001). A difference in death-censored graft survival by number of transplants was seen, with a median graft survival of 328 months for recipients of the 1st transplant, 209 months for the 2nd and 150 months for the 3rd+ (p = 0.038). The same difference was seen in deceased donor kidneys (p = 0.048), but not in grafts from living donors (p = 0.2). Patient survival was comparable between the three groups (p = 0.59). Conclusions: In the attempt to expand the organ donor pool, particular attention should be reserved to high complex recipients, such as the repeated kidney transplant population. In this peculiar context, the quality of the donor has been shown to represent a main determinant for graft survival—in fact, kidney retrieved from living donors provide comparable outcomes to those from single-graft recipients.
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