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Hau HM, Jahn N, Brunotte M, Wagner T, Rademacher S, Branzan D, Sucher E, Seehofer D, Sucher R. Pre-operative ankle-brachial index for cardiovascular risk assessment in simultaneous pancreas-kidney transplant recipients: a simple and elegant strategy! BMC Surg 2021; 21:156. [PMID: 33752640 PMCID: PMC7983212 DOI: 10.1186/s12893-021-01159-6] [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: 01/14/2021] [Accepted: 03/15/2021] [Indexed: 12/24/2022] Open
Abstract
Background Patients with insulin-dependent diabetes mellitus type 1 (IDDM1) and end-stage kidney disease (ESKD) undergoing simultaneous pancreas kidney transplantation (SPKT) are a population with diffuse atherosclerosis and elevated risk of cardio- and cerebrovascular morbidity and mortality. We aimed to investigate the feasibility of preoperative screening for peripheral arterial disease (PAD), specifically ankle-brachial index (ABI) testing, to predict peri- and postoperative outcomes in SPKT recipients. Methods Medical data (2000–2016) from all patients with IDDM and ESKD undergoing SPKT at our transplant center were retrospectively analyzed. The correlation between PAD (defined by an abnormal ABI before SPKT and graft failure and mortality rates as primary end points, and the occurrence of acute myocardial infarction, cerebrovascular and peripheral vascular complications as secondary end points were investigated after adjustment for known cardiovascular risk factors. Results Among 101 SPKT recipients in our transplant population who underwent structured physiological arterial studies, 17 patients (17%) were diagnosed with PAD before transplantation. PAD, as defined by a low ABI index, was an independent and significant predictor of death (HR, 2.99 (95% CI 1.00–8.87), p = 0.049) and pancreas graft failure (HR, 4.3 (95% CI 1.24–14.91), p = 0.022). No significant differences were observed for kidney graft failure (HR 1.85 (95% CI 0.76–4.50), p = 0.178). In terms of the secondary outcomes, patients with PAD were more likely to have myocardial infarction, stroke, limb ischemia, gangrene or amputation (HR, 2.90 (95% CI 1.19–7.04), p = 0.019). Conclusions Pre-transplant screening for PAD and cardiovascular risk factors with non-invasive ABI testing may help to reduce perioperative complications in high-risk patients. Future research on long-term outcomes might provide more in depth insights in optimal treatment strategies for PAD among SPKT recipients.
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Affiliation(s)
- Hans-Michael Hau
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany. .,Department of Visceral, Thoracic and Vascular Surgery, University Hospital and Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany. .,Department of Surgery, University Hospital of Dresden, Fetscherstrasse 74, 03107, Dresden, Germany.
| | - Nora Jahn
- Department of Anaesthesiology and Intensive Care Medicine, University Hospital of Leipzig, Leipzig, Germany
| | - Max Brunotte
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Tristan Wagner
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Sebastian Rademacher
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Daniela Branzan
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Elisabeth Sucher
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Daniel Seehofer
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Robert Sucher
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
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Amara D, Braun HJ, Shui AM, Sorrentino T, Ramirez JL, Lin J, Liu IH, Mello A, Stock PG, Hiramoto JS. Long-term Lower Extremity and Cardiovascular Complications after Simultaneous Pancreas-Kidney Transplant. Clin Transplant 2021; 35:e14195. [PMID: 33340143 DOI: 10.1111/ctr.14195] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 11/27/2020] [Accepted: 12/10/2020] [Indexed: 12/19/2022]
Abstract
Lower extremity (LE) vascular disease and adverse cardiovascular events (ACEs) cause significant long-term morbidity after simultaneous pancreas-kidney (SPK) transplantation. This study's purpose was to describe the incidence of, and risk factors associated with, LE vascular complications and related ACEs following SPK. All SPKs performed at the authors' institution from 2000 to 2019 were retrospectively analyzed. The primary outcome was any LE vascular event, defined as LE endovascular intervention, open surgery, amputation, or invasive podiatry intervention. Secondary outcomes included post-SPK ACE. A total of 363 patients were included, of whom 54 (14.9%) required at least one LE vascular intervention following SPK. Only 3 patients received pre-SPK ankle brachial indices (ABIs). A history of peripheral artery disease (PAD) (HR 2.95, CI 1.4-6.2) was a risk factor for post-SPK LE vascular intervention even after adjustment for other factors. Fifty-nine (16.3%) patients experienced an ACE in follow-up. Requiring a LE intervention post-SPK was associated with a subsequent ACE (HR 2.3, CI 1.2-4.5). LE vascular and cardiovascular complications continue to be significant sources of morbidity for SPK patients, especially for patients with preexisting PAD. The highest risk patients may benefit from more intensive pre- and post-SPK workup with ABIs and follow-up with a vascular surgeon.
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Affiliation(s)
- Dominic Amara
- School of Medicine, University of California, San Francisco, CA, USA
| | - Hillary J Braun
- Department of Surgery, University of California, San Francisco, CA, USA
| | - Amy M Shui
- Department of Epidemiology and Biostatistics, University of California, San Francisco, CA, USA
| | - Thomas Sorrentino
- Department of Surgery, University of California, San Francisco, CA, USA
| | - Joel L Ramirez
- Department of Surgery, University of California, San Francisco, CA, USA
| | - Joseph Lin
- Department of Surgery, University of California, San Francisco, CA, USA
| | - Iris H Liu
- School of Medicine, University of California, San Francisco, CA, USA
| | - Anna Mello
- Department of Surgery, University of California, San Francisco, CA, USA
| | - Peter G Stock
- Department of Surgery, University of California, San Francisco, CA, USA
| | - Jade S Hiramoto
- Department of Surgery, University of California, San Francisco, CA, USA
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Buntinx M, Lavrijsen APM, de Fijter JW, Reinders MEJ, Schepers A, Bouwes Bavinck JN. Skin disorders indicating peripheral arterial occlusive disease and chronic venous insufficiency in organ transplant recipients. J Diabetes Complications 2020; 34:107623. [PMID: 32466875 DOI: 10.1016/j.jdiacomp.2020.107623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 05/06/2020] [Accepted: 05/09/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND Peripheral arterial occlusive disease (PAOD) and chronic venous insufficiency (CVI) in organ transplant recipients (OTR) can lead to harmful outcomes. We made an inventory of cutaneous manifestations of PAOD and CVI in OTR in relation with diabetes and other potential risk factors. METHODS A prospective study in a single center was performed. OTR (n = 112) were included at the outpatient clinic to investigate clinical signs of PAOD and CVI. The most commonly associated risk factors were determined. RESULTS PAOD had been diagnosed in 15.6% and CVI in 30.0% of the patients. Diabetes was the cause of organ failure in 9.8% of the patients. Type 1 diabetes had been diagnosed in 8.9% and type 2 diabetes in 21.4% (59.1% new-onset diabetes after transplantation). Type 1 diabetes showed an increased risk for PAOD and limb amputation with hazard ratios of 11.0 (95%CI 3.0-40.2) and 9.1 (95%CI 1.4-58.6). Type 2 diabetes showed no increased risk. CONCLUSIONS Patients with a history of type 1 diabetes were at high risk for PAOD even years after a simultaneous pancreas kidney transplantation and they should remain under close observation for PAOD even though they are supposedly "cured" from their diabetes to prevent a harmful outcome.
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Affiliation(s)
- Maren Buntinx
- Department of Dermatology, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, the Netherlands
| | - Adriana P M Lavrijsen
- Department of Dermatology, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, the Netherlands
| | - Johan W de Fijter
- Department of Internal Medicine (Nephrology), Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, the Netherlands
| | - Marlies E J Reinders
- Department of Internal Medicine (Nephrology), Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, the Netherlands
| | - Abbey Schepers
- Department of Vascular Surgery, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, the Netherlands
| | - Jan N Bouwes Bavinck
- Department of Dermatology, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, the Netherlands.
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4
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Sucher R, Rademacher S, Jahn N, Brunotte M, Wagner T, Alvanos A, Sucher E, Seehofer D, Scheuermann U, Hau HM. Effects of simultaneous pancreas-kidney transplantation and kidney transplantation alone on the outcome of peripheral vascular diseases. BMC Nephrol 2019; 20:453. [PMID: 31815616 PMCID: PMC6902504 DOI: 10.1186/s12882-019-1649-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 11/28/2019] [Indexed: 11/10/2022] Open
Abstract
Background The effects of Simultaneous Pancreas Kidney Transplantation (SPKT) on Peripheral Vascular Disease (PVD) warrants additional study and more target focus, since little is known about the mid- and long-term effects on the progression of PVD after transplantation. Methods 101 SPKT and 26 Kidney Transplantation Alone (KTA) recipients with insulin-dependent diabetes mellitus (IDDM) were retrospectively evaluated with regard to graft and metabolic outcome. Special subgroup analysis was directed towards the development and progression of peripheral vascular complications (PVC) (amputation, ischemic ulceration, lower extremity angioplasty/ bypass surgery) after transplantation. Results The 10-year patient survival was significantly higher in the SPKT group (SPKT: 82% versus KTA 40%; P < 0.001). KTA recipients had a higher prevalence of atherosclerotic risk factors, including coronary artery disease (P < 0.001), higher serum triglyceride levels (P = 0.049), higher systolic (P = 0.03) and diastolic (P = 0.02) blood pressure levels. The incidence of PVD before transplantation was comparable between both groups (P = 0.114). Risk factor adjusted multivariate analysis revealed that patients with SPKT had a significant lower amount (32%) of PVCs (32 PVCs in 21 out of 101 SPKT; P < 0.001) when compared to the KTA patients who developed a significant increase in PVCs to 69% of cases (18 PVCs in 11 out of 26 KTA; P < 0.001). In line mean values of HbA1c (P < 0.01) and serum triglycerides (P < 0.01) were significantly lower in patients with SPKT > 8 years after transplantation. Conclusion SPKT favorably slows down development and progression of PVD by maintaining a superior metabolic vascular risk profile in patients with IDDM1.
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Affiliation(s)
- Robert Sucher
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Sebastian Rademacher
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Nora Jahn
- Department of Anesthesiology and Intensive Care Medicine, University Hospital of Leipzig, Leipzig, Germany
| | - Max Brunotte
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Tristan Wagner
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Athanasios Alvanos
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Elisabeth Sucher
- Department of Gastroenterology, University Hospital of Leipzig, Leipzig, Germany
| | - Daniel Seehofer
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Uwe Scheuermann
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Hans-Michael Hau
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany. .,Department of Surgery, University Hospital of Leipzig, Liebigstrasse 20, 04103, Leipzig, Germany.
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Sharma A, Vas P, Cohen S, Patel T, Thomas S, Fountoulakis N, Karalliedde J. Clinical features and burden of new onset diabetic foot ulcers post simultaneous pancreas kidney transplantation and kidney only transplantation. J Diabetes Complications 2019; 33:662-667. [PMID: 31301954 DOI: 10.1016/j.jdiacomp.2019.05.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 05/21/2019] [Accepted: 05/22/2019] [Indexed: 10/26/2022]
Abstract
BACKGROUND Patients with diabetes and kidney disease are at risk of diabetes-related foot ulcers (DFU). Whether this risk is modified post simultaneous pancreas-kidney (SPK) or kidney only (KO) transplant is unknown. METHODS We evaluated the incidence of new onset DFU post SPK and KO transplant in 235 patients with diabetic kidney disease and diabetic neuropathy. In total 90 (51% male) SPK patients and 145 KO (66% male, 26% Type 1 DM) were evaluated in a single centre retrospective study. Median (range) follow up was 6 (3 to 13) years for both cohorts. RESULTS We observed that 16 (17%) of SPK and 22 (15%) KO patients respectively developed a DFU during follow up. In both cohorts a history of peripheral arterial disease [37.5% vs. 4%] and pre-transplant history of DFU were associated with post transplant DFU (p ≪ 0.05). In KO cohort, patients who developed a DFU were more likely to have T1DM than T2DM (29% vs. 10%), p ≪ 0.05. There was no impact of DFU on SPK transplant failure. In contrast patients with DFU post KO transplant had more than five fold increased hazard ratio (HR) of transplant failure as compared to those without DFU independent of other risk factors [HR 5.19 95% CI (2.05 to 13.18) p = 0.001]. CONCLUSION Nearly 1 in 7 patients develop a new onset DFU post KO or SPK transplantation and DFU also significantly increases risk of failure of the transplanted kidney. Our results highlight the need for greater awareness of regular foot examination, DFU prevention and risk evaluation in post-transplant patients. RESEARCH IN CONTEXT Evidence before this study Patients with diabetes and kidney disease are at enhanced risk of diabetic foot ulcers (DFU). Whether this risk is modified post successful kidney only (KO) or simultaneous pancreas and kidney (SPK) transplantation is unknown. Small case series and studies with short term follow up report varied rates of incidence and are from historical cohorts before the use of modern anti-transplant medications and treatments. Short term studies also suggest that post SPK the resultant normoglycaemia may reverse some features and risk markers of DFU. There are no long term studies on the incidence and impact of diabetic foot ulcers in patients with diabetic kidney disease post SPK or KO transplantation. Added value of this study We report the long term follow up results on DFU incidence, clinical features and related impact on transplant viability in 235 patients with diabetic kidney disease and neuropathy post successful SPK and KO transplant at a single centre. We observed that nearly 1 in 7 patients developed a DFU during follow up and that in patients who received KO transplant onset of DFU was associated with more than 5 fold increase of transplant failure. Implications of all the available evidence Our results highlight the need for greater awareness of regular foot examination, DFU prevention and risk evaluation in post-transplant patients. Despite normoglycaemia post SPK there is a residual burden and risk of DFU. Our work establishes a clinical rationale for further research to explore putative mechanisms that could explain the association between DFU and renal transplant dysfunction.
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Affiliation(s)
- Angelica Sharma
- Department of Diabetes and Endocrinology, Guy's and St Thomas' NHS Trust, London, UK; Department of Renal Medicine, Guy's and St Thomas' NHS Trust, London, UK; Department of Diabetes and Endocrinology, King's College Hospital, London, UK
| | - Prashanth Vas
- Department of Diabetes and Endocrinology, Guy's and St Thomas' NHS Trust, London, UK; Department of Renal Medicine, Guy's and St Thomas' NHS Trust, London, UK; Department of Diabetes and Endocrinology, King's College Hospital, London, UK.
| | - Siew Cohen
- Department of Diabetes and Endocrinology, Guy's and St Thomas' NHS Trust, London, UK; Department of Renal Medicine, Guy's and St Thomas' NHS Trust, London, UK; Department of Diabetes and Endocrinology, King's College Hospital, London, UK
| | - Tejal Patel
- Department of Diabetes and Endocrinology, Guy's and St Thomas' NHS Trust, London, UK; Department of Renal Medicine, Guy's and St Thomas' NHS Trust, London, UK; Department of Diabetes and Endocrinology, King's College Hospital, London, UK
| | - Stephen Thomas
- Department of Diabetes and Endocrinology, Guy's and St Thomas' NHS Trust, London, UK; Department of Renal Medicine, Guy's and St Thomas' NHS Trust, London, UK; Department of Diabetes and Endocrinology, King's College Hospital, London, UK
| | - Nikolaos Fountoulakis
- Department of Diabetes and Endocrinology, Guy's and St Thomas' NHS Trust, London, UK; Department of Renal Medicine, Guy's and St Thomas' NHS Trust, London, UK; Department of Diabetes and Endocrinology, King's College Hospital, London, UK
| | - Janaka Karalliedde
- Department of Diabetes and Endocrinology, Guy's and St Thomas' NHS Trust, London, UK; Department of Renal Medicine, Guy's and St Thomas' NHS Trust, London, UK; Department of Diabetes and Endocrinology, King's College Hospital, London, UK.
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6
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MacCraith E, Davis NF, Browne C, Mohan P, Hickey D. Simultaneous pancreas and kidney transplantation: Incidence and risk factors for amputation after 10-year follow-up. Clin Transplant 2017; 31. [DOI: 10.1111/ctr.12976] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/20/2017] [Indexed: 11/26/2022]
Affiliation(s)
- Eoin MacCraith
- Department of Urology and Transplant Surgery; Beaumont Hospital; Dublin Ireland
| | - Niall F. Davis
- Department of Urology and Transplant Surgery; Beaumont Hospital; Dublin Ireland
| | - Cliodhna Browne
- Department of Urology and Transplant Surgery; Beaumont Hospital; Dublin Ireland
| | - Ponnusamy Mohan
- Department of Urology and Transplant Surgery; Beaumont Hospital; Dublin Ireland
| | - David Hickey
- Department of Urology and Transplant Surgery; Beaumont Hospital; Dublin Ireland
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Willicombe M, Kumar N, Goodall D, Clarke C, McLean AG, Power A, Taube D. Incidence, risk factors, and outcomes of stroke post-transplantation in patients receiving a steroid sparing immunosuppression protocol. Clin Transplant 2014; 29:18-25. [PMID: 25307366 DOI: 10.1111/ctr.12476] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/06/2014] [Indexed: 12/13/2022]
Abstract
Corticosteroid use after transplantation is associated with an increased incidence of cardiovascular events and death. Cerebrovascular disease is a common cause of morbidity and mortality post-renal transplantation; however, a dedicated analysis of cerebrovascular disease in recipients of a steroid sparing protocol has not been reported. The aim of this study was to examine the incidence, risk factors, and outcomes of CVA in transplant recipients receiving a steroid sparing protocol. We retrospectively analyzed 1237 patients who received a kidney alone or a simultaneous pancreas and kidney (SPK) transplant. Fifty-six of 1237 (4.53%) patients had a CVA post-transplant. All-cause mortality was significantly higher in the CVA group compared with the non-CVA group, OR: 3.4 (1.7-7.0), p < 0.001. Factors found to be associated with increased risk of CVA by multivariate analysis were older age, HR: 1.07 (1.04-1.09), p < 0.001; diabetes at the time of transplantation, HR: 2.83 (1.42-5.64), p = 0.003; corticosteroid use pre-transplant, HR: 3.27 (1.29-8.27), p = 0.013 and recipients of a SPK, HR: 4.03 (1.85-8.79), p < 0.001. This study has identified subgroups of patients who are at increased risk of CVA post-transplant in patients otherwise receiving a steroid sparing immunosuppression protocol.
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Affiliation(s)
- Michelle Willicombe
- Imperial College Kidney and Transplant Centre, Hammersmith Hospital, London, UK
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9
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Affiliation(s)
- Jonathan Valabhji
- Department of Diabetes and Endocrinology, Imperial College Healthcare NHS Trust and Division of Medicine, Imperial College London, UK.
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10
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Lauria MW, Figueiró JM, Machado LJC, Sanches MD, Lana AMQ, Ribeiro-Oliveira A. The impact of functioning pancreas-kidney transplantation and pancreas alone transplantation on the lipid metabolism of statin-naïve diabetic patients. Clin Transplant 2009; 23:199-205. [PMID: 19220365 DOI: 10.1111/j.1399-0012.2009.00969.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
OBJECTIVE To compare the lipid profile (total cholesterol - TC, triglycerides - TG, high density lipoprotein cholesterol - HDL-c, low density lipoprotein cholesterol - LDL-c and non-HDL cholesterol - NHDL-c) of patients with functioning pancreas-kidney transplantation (PKT) or pancreas transplantation alone (PTA) after one (T1) and two yr (T2) following their pre-transplantation data (T0). METHODS Fifty-three type 1 diabetic patients underwent pancreas transplantation (42 PKT and 11 PTA) remaining euglycemic after transplantation were evaluated before and one and two yr after the procedures. They were using predominantly tacrolimus-mycophenolate mofetil-based immunosuppression and low glucocorticoid dose with systemic venous drainage of the pancreatic graft. None of them used hypolipidemic agents for economical reasons. Lipids were reported as means +/- standard error of the mean. Data obtained in T0 were compared with T1 and T2 using ANOVA followed by Student's t-test. RESULTS TC, LDL-c, NHDL-c and TG were lower in T1 and T2 when compared with T0 (p < 0.05) in PKT, while no change was observed for HDL-c (p > 0.05). PTA group showed no significant changes in lipids. CONCLUSION In spite of the known side effects of tacrolimus-based immunosuppression to lipids, our study with a statin-naïve sample showed improvements (PKT) or stabilization (PTA) in the serum lipid profile after pancreas transplantation.
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Affiliation(s)
- Márcio W Lauria
- Laboratory of Endocrinology, Department of Internal Medicine, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
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