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1.
Transpl Int ; 36: 11428, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37779511

RESUMEN

Whilst renal transplantation is the optimal treatment for many patients with end-stage kidney disease, the latest international guidelines are unable to make recommendations for the management of patients with end-stage kidney stage kidney disease and Class III Obesity (BMI ≥40 kg/m2). Data on all adult patients receiving a kidney-only-transplant in the UK between 2015-2021 were analysed from a prospectively collected database and interrogated across a range of parameters. We then analysed in detail the outcomes of patients transplanted at the highest-volume unit. There were 22,845 renal transplants in the study time-period; just 44 (0.2%) were performed in recipients with a BMI ≥40 kg/m2. Most transplant centres did not transplant any patients in this category. In the centre with the highest volume, there were 21 transplants (9 living donor) performed in 20 individuals (13 male, median age 46 years). One-year patient and death-censored graft survival was 95% and 85%. Successful transplantation is possible in patients with BMI ≥40 kg/m2 but carries additional risk. Obesity should not be the sole factor considered when deciding on transplant suitability. Restricting transplantation to a small number of high-volume centres in each country should be considered to optimize outcomes.


Asunto(s)
Fallo Renal Crónico , Trasplante de Riñón , Adulto , Humanos , Masculino , Persona de Mediana Edad , Trasplante de Riñón/efectos adversos , Obesidad/complicaciones , Obesidad/cirugía , Supervivencia de Injerto , Donadores Vivos , Resultado del Tratamiento , Estudios Retrospectivos
2.
Transpl Int ; 36: 11139, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37152615

RESUMEN

Living donor transplantation is the optimal treatment for suitable patients with end-stage kidney disease. There are particular advantages for older individuals in terms of elective surgery, timely transplantation, and early graft function. Yet, despite the superiority of living donor transplantation especially for this cohort, older patients are significantly less likely to access this treatment modality than younger age groups. However, given the changing population demographic in recent decades, there are increasing numbers of older but otherwise healthy individuals with kidney disease who could benefit from living donor transplantation. The complex reasons for this inequity of access are explored, including conscious and unconscious age-related bias by healthcare professionals, concerns relating to older living donors, ethical anxieties related to younger adults donating to aging patients, unwillingness of potential older recipients to consider living donation, and the relevant legislation. There is a legal and moral duty to consider the inequity of access to living donor transplantation, recognising both the potential disparity between chronological and physiological age in older patients, and benefits of this treatment for individuals as well as society.


Asunto(s)
Fallo Renal Crónico , Trasplante de Riñón , Adulto , Humanos , Anciano , Donadores Vivos , Trasplante de Riñón/efectos adversos , Supervivencia de Injerto , Riñón , Fallo Renal Crónico/cirugía , Fallo Renal Crónico/etiología
3.
N Engl J Med ; 380(20): 1918-1928, 2019 05 16.
Artículo en Inglés | MEDLINE | ID: mdl-31091373

RESUMEN

BACKGROUND: In the context of kidney transplantation, genomic incompatibilities between donor and recipient may lead to allosensitization against new antigens. We hypothesized that recessive inheritance of gene-disrupting variants may represent a risk factor for allograft rejection. METHODS: We performed a two-stage genetic association study of kidney allograft rejection. In the first stage, we performed a recessive association screen of 50 common gene-intersecting deletion polymorphisms in a cohort of kidney transplant recipients. In the second stage, we replicated our findings in three independent cohorts of donor-recipient pairs. We defined genomic collision as a specific donor-recipient genotype combination in which a recipient who was homozygous for a gene-intersecting deletion received a transplant from a nonhomozygous donor. Identification of alloantibodies was performed with the use of protein arrays, enzyme-linked immunosorbent assays, and Western blot analyses. RESULTS: In the discovery cohort, which included 705 recipients, we found a significant association with allograft rejection at the LIMS1 locus represented by rs893403 (hazard ratio with the risk genotype vs. nonrisk genotypes, 1.84; 95% confidence interval [CI], 1.35 to 2.50; P = 9.8×10-5). This effect was replicated under the genomic-collision model in three independent cohorts involving a total of 2004 donor-recipient pairs (hazard ratio, 1.55; 95% CI, 1.25 to 1.93; P = 6.5×10-5). In the combined analysis (discovery cohort plus replication cohorts), the risk genotype was associated with a higher risk of rejection than the nonrisk genotype (hazard ratio, 1.63; 95% CI, 1.37 to 1.95; P = 4.7×10-8). We identified a specific antibody response against LIMS1, a kidney-expressed protein encoded within the collision locus. The response involved predominantly IgG2 and IgG3 antibody subclasses. CONCLUSIONS: We found that the LIMS1 locus appeared to encode a minor histocompatibility antigen. Genomic collision at this locus was associated with rejection of the kidney allograft and with production of anti-LIMS1 IgG2 and IgG3. (Funded by the Columbia University Transplant Center and others.).


Asunto(s)
Proteínas Adaptadoras Transductoras de Señales/genética , Variaciones en el Número de Copia de ADN , Rechazo de Injerto/genética , Trasplante de Riñón , Proteínas con Dominio LIM/genética , Proteínas Adaptadoras Transductoras de Señales/inmunología , Estudios de Cohortes , Estudios de Asociación Genética , Genotipo , Antígenos HLA/genética , Prueba de Histocompatibilidad , Humanos , Inmunoglobulina G/sangre , Proteínas con Dominio LIM/inmunología , Proteínas de la Membrana/genética , Proteínas de la Membrana/inmunología , Polimorfismo de Nucleótido Simple , Donantes de Tejidos
4.
Transpl Int ; 35: 10131, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35387400

RESUMEN

Clinical teams understandably wish to minimise risks to living kidney donors undergoing surgery, but are often faced with uncertainty about the extent of risk, or donors who wish to proceed despite those risks. Here we explore how these difficult decisions may be approached and consider the conflicts between autonomy and paternalism, the place of self-sacrifice and consideration of risks and benefits. Donor autonomy should be considered as in the context of the depth and strength of feeling, understanding risk and competing influences. Discussion of risks could be improved by using absolute risk, supra-regional MDMs and including the risks to the clinical team as well as the donor. The psychological effects on the donor of poor outcomes for the untransplanted recipient should also be taken into account. There is a lack of detailed data on the risks to the donor who has significant co-morbidities.


Asunto(s)
Trasplante de Órganos , Obtención de Tejidos y Órganos , Humanos , Riñón , Donadores Vivos/psicología
5.
Nephrol Dial Transplant ; 36(9): 1742-1753, 2021 08 27.
Artículo en Inglés | MEDLINE | ID: mdl-33585931

RESUMEN

BACKGROUND: Publications from the last decade have increased knowledge regarding long-term risks after kidney donation. We wanted to perform a survey to assess how transplant professionals in Europe inform potential kidney donors regarding long-term risks. The objectives of the survey were to determine how they inform donors and to what extent, and to evaluate the degree of variation. METHODS: All transplant professionals involved in the evaluation process were considered eligible, regardless of the type of profession. The survey was dispatched as a link to a web-based survey. The subjects included questions on demographics, the information policy of the respondent and the use of risk calculators, including the difference of relative and absolute risks and how the respondents themselves understood these risks. RESULTS: The main finding was a large variation in how often different long-term risks were discussed with the potential donors, i.e. from always to never. Eighty percent of respondents stated that they always discuss the risk of end-stage renal disease, while 56% of respondents stated that they always discuss the risk of preeclampsia. Twenty percent of respondents answered correctly regarding the relationship between absolute and relative risks for rare outcomes. CONCLUSIONS: The use of written information and checklists should be encouraged. This may improve standardization regarding the information provided to potential living kidney donors in Europe. There is a need for information and education among European transplant professionals regarding long-term risks after kidney donation and how to interpret and present these risks.


Asunto(s)
Trasplante de Riñón , Humanos , Riñón , Trasplante de Riñón/efectos adversos , Donadores Vivos , Encuestas y Cuestionarios , Recolección de Tejidos y Órganos
6.
Am J Kidney Dis ; 73(3): 421-424, 2019 03.
Artículo en Inglés | MEDLINE | ID: mdl-30201548

RESUMEN

Gitelman syndrome is caused by inactivating mutations of the gene that encodes the renal sodium/chloride cotransporter (NCC; encoded by SLC12A3), resulting in hypokalemia, hypomagnesemia, hypocalciuria, and metabolic alkalosis. Renal salt wasting commonly provokes mild hypotension. The paucity of previous kidney transplants from donors with known tubulopathies suggests that such conditions may be considered contraindications to donation. A 76-year-old man received a live unrelated kidney transplant from a donor with known Gitelman syndrome secondary to a pathogenic mutation of SLC12A3. Immediate graft function preceded the emergence of the Gitelman syndrome biochemical phenotype and blood pressure subsequently improved. The recipient developed unexpected hyponatremia. Potential causes are discussed, including the possibility that it paralleled the physiologic changes seen in the high-volume state of thiazide-induced hyponatremia. Transplanted kidneys are subject to nephrotoxicity from the use of calcineurin inhibitors. Acquired Gitelman syndrome may confer a potential long-term advantage to the recipient through both improved blood pressure control and protection against the calcineurin inhibitor-induced side-effect profile caused by NCC overactivation. Both the donor and recipient remain well. In conclusion, Gitelman syndrome need not preclude kidney donation and transference of the phenotype may have benefits for the recipient.


Asunto(s)
Síndrome de Gitelman , Hipertensión/cirugía , Trasplante de Riñón , Anciano , Selección de Donante , Humanos , Masculino
7.
Am J Kidney Dis ; 71(2): 209-215, 2018 02.
Artículo en Inglés | MEDLINE | ID: mdl-29150247

RESUMEN

BACKGROUND: Survival of kidney transplants and their recipients is significantly better after living donor than after deceased donor transplantation. However, historically, Northern Ireland has had a low rate of living donor kidney transplantation. The length and complexity of donor evaluation has been one of the main factors contributing to this pattern. STUDY DESIGN: Quality improvement project. SETTINGS & PARTICIPANTS: All people in Northern Ireland expressing an interest in becoming a living kidney donor between 2010 and 2015. QUALITY IMPROVEMENT INTERVENTION: Potential donors deemed to be suitable after a screening questionnaire attended a comprehensive 1-day evaluation including all investigations that had been previously been implemented across multiple clinical visits. OUTCOME: Change in rate of living donor transplantation following the quality improvement intervention. MEASUREMENTS: Demographic data and reasons for nondonation. RESULTS: 431 potential donors underwent a 1-day assessment, with 284 (66%) ultimately donating and 12 (3%) still active in the program. Of the 135 (31%) potential donors who did not donate, 48 were unsuitable due to medical or surgical issues, 2 became pregnant, and 18 withdrew. For 38 (9%) potential donors, intended recipients found an alternative living or deceased donor transplant. For 29 (6%) potential donors, the transplantation did not proceed because of recipient-related issues. The annual rate of living donor kidney transplantation in Northern Ireland increased from a mean of 4.3 per million population (pmp) between 2000 and 2009 to 32.6 pmp between 2011 and 2015. LIMITATIONS: Single geographical region with a potentially unrepresentative population and health care organization. Retrospective observational study. Paucity of data from the preintervention period. CONCLUSIONS: Following implementation of a 1-day assessment process, we observed a considerable and sustained increase in the rate of living donor kidney transplantation. Making donor evaluation easier holds promise to increase the number of living donor kidney transplants, potentially optimizing outcomes for both recipients and donors.


Asunto(s)
Trasplante de Riñón , Donadores Vivos/estadística & datos numéricos , Mejoramiento de la Calidad/organización & administración , Obtención de Tejidos y Órganos , Adulto , Femenino , Humanos , Trasplante de Riñón/métodos , Trasplante de Riñón/estadística & datos numéricos , Masculino , Irlanda del Norte , Estudios Retrospectivos , Obtención de Tejidos y Órganos/métodos , Obtención de Tejidos y Órganos/organización & administración
8.
Practitioner ; 261(1801): 17-20, 2017 02.
Artículo en Inglés | MEDLINE | ID: mdl-29020720

RESUMEN

Acute pyelonephritis is suggested by the constellation of fever (temperature ≥ 38.5° C), flank pain (typically unilateral), nausea and vomiting, and costovertebral angle tenderness. Complaints typical of lower UTI are variably present. The severity of symptoms ranges from a mild pyrexial illness to life-threatening sepsis. The diagnosis of acute pyelonephritis should be suspected on the basis of the history and clinical examination. If the urine dipstick is negative for nitrites and leukocyte esterase this does not exclude the diagnosis, but it should prompt a re-evaluation of the clinical features and consideration of other potential diagnoses. Antibiotic therapy should be initiated without delay; this can be modified subsequently depending on the culture result. Antibiotics that are typically effective in lower urinary tract infections are frequently inadequate in acute pyelonephritis, and more prolonged therapy is necessary. Review of the clinical course and urine culture results is necessary to ensure that the patient is improving. Patients who have not improved within two days of commencing antimicrobial treatment should be referred to secondary care unless the infecting pathogen is not susceptible to the agent originally used, an alternative appropriate antibiotic is available, and the patient remains well enough for community care.


Asunto(s)
Antibacterianos/farmacología , Riñón/diagnóstico por imagen , Pielonefritis , Sepsis , Enfermedad Aguda , Algoritmos , Diagnóstico Tardío/efectos adversos , Diagnóstico Tardío/prevención & control , Monitoreo de Drogas/métodos , Humanos , Pielonefritis/complicaciones , Pielonefritis/diagnóstico , Pielonefritis/tratamiento farmacológico , Pielonefritis/fisiopatología , Medición de Riesgo , Sepsis/diagnóstico , Sepsis/tratamiento farmacológico , Sepsis/etiología , Sepsis/mortalidad , Índice de Severidad de la Enfermedad , Evaluación de Síntomas/métodos , Tiempo de Tratamiento , Resultado del Tratamiento
9.
Nephrol Dial Transplant ; 31(6): 1002-13, 2016 06.
Artículo en Inglés | MEDLINE | ID: mdl-26763669

RESUMEN

BACKGROUND: Kidney recipients maintaining a prolonged allograft survival in the absence of immunosuppressive drugs and without evidence of rejection are supposed to be exceptional. The ERA-EDTA-DESCARTES working group together with Nantes University launched a European-wide survey to identify new patients, describe them and estimate their frequency for the first time. METHODS: Seventeen coordinators distributed a questionnaire in 256 transplant centres and 28 countries in order to report as many 'operationally tolerant' patients (TOL; defined as having a serum creatinine <1.7 mg/dL and proteinuria <1 g/day or g/g creatinine despite at least 1 year without any immunosuppressive drug) and 'almost tolerant' patients (minimally immunosuppressed patients (MIS) receiving low-dose steroids) as possible. We reported their number and the total number of kidney transplants performed at each centre to calculate their frequency. RESULTS: One hundred and forty-seven questionnaires were returned and we identified 66 TOL (61 with complete data) and 34 MIS patients. Of the 61 TOL patients, 26 were previously described by the Nantes group and 35 new patients are presented here. Most of them were noncompliant patients. At data collection, 31/35 patients were alive and 22/31 still operationally tolerant. For the remaining 9/31, 2 were restarted on immunosuppressive drugs and 7 had rising creatinine of whom 3 resumed dialysis. Considering all patients, 10-year death-censored graft survival post-immunosuppression weaning reached 85% in TOL patients and 100% in MIS patients. With 218 913 kidney recipients surveyed, cumulative incidences of operational tolerance and almost tolerance were estimated at 3 and 1.5 per 10 000 kidney recipients, respectively. CONCLUSIONS: In kidney transplantation, operational tolerance and almost tolerance are infrequent findings associated with excellent long-term death-censored graft survival.


Asunto(s)
Rechazo de Injerto/epidemiología , Supervivencia de Injerto/inmunología , Tolerancia Inmunológica/inmunología , Terapia de Inmunosupresión/métodos , Trasplante de Riñón , Receptores de Trasplantes , Adulto , Europa (Continente)/epidemiología , Femenino , Rechazo de Injerto/inmunología , Rechazo de Injerto/prevención & control , Humanos , Incidencia , Masculino , Encuestas y Cuestionarios , Tasa de Supervivencia/tendencias , Trasplante Homólogo
10.
Practitioner ; 260(1790): 17-20, 2-3, 2016 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-27032222

RESUMEN

Nephrolithiasis, or renal stone disease, is common and the incidence is increasing globally. In the UK the lifetime risk is estimated to be 8-10%. On a population level, the increase in stone incidence, erosion of gender disparity, and younger age of onset is likely to reflect increasing prevalence of obesity and a Western diet with a high intake of animal protein and salt. Stones can be detected by a variety of imaging techniques. The gold standard is a non-contrast CT of kidneys, ureters and bladder (CT KUB) which can identify > 99% of stones. CT KUB should be the primary mode of imaging for all patients with colic unless contraindicated. In such instances, or if a CT KUB is not available, an ultrasound KUB is an alternative. This has advantages in terms of radiation exposure and cost, but is limited in sensitivity, particularly for ureteric stones. Once diagnosed, a plain film KUB can be used for follow-up of radiopaque stones. For most patients diclofenac is a reasonable first choice of analgesia, e.g. 50-100 mg rectally, or 75 mg IM. Opioid medication can worsen nausea and be less effective, but should be used if there is a contraindication to NSAIDs. A combination of diclofenac, paracetamol, and/or codeine regularly can provide adequate pain control in many cases. Failure of this analgesic combination should prompt consideration of secondary care support. If a ureteric stone < 5 mm in diameter is identified, the expectation is that this will pass without intervention. Initially medical management is still useful for stones between 5 and 10mm in diameter, but urology input is more likely to be necessary as up to 50% of these may require intervention. Stones that are >10 mm in diameter should be discussed with the urology service as they are unlikely to pass spontaneously.


Asunto(s)
Cálculos Renales/terapia , Humanos , Cálculos Renales/diagnóstico , Cálculos Renales/patología
12.
Nephrol Dial Transplant ; 30(8): 1403-11, 2015 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-26044837

RESUMEN

BACKGROUND: The prevalence of obesity is increasing globally and is associated with chronic kidney disease and premature mortality. However, the impact of recipient obesity on kidney transplant outcomes remains unclear. This study aimed to investigate the association between recipient obesity and mortality, death-censored graft loss and delayed graft function (DGF) following kidney transplantation. METHODS: A systematic review and meta-analysis was conducted using Medline, Embase and the Cochrane Library. Observational studies or randomized controlled trials investigating the association between recipient obesity at transplantation and mortality, death-censored graft loss and DGF were included. Obesity was defined as a body mass index (BMI) of ≥30 kg/m(2). Obese recipients were compared with those with a normal BMI (18.5-24.9 kg/m(2)). Pooled estimates of hazard ratios (HRs) for patient mortality or death-censored graft loss and odds ratios (ORs) for DGF were calculated. RESULTS: Seventeen studies including 138 081 patients were analysed. After adjustment, there was no significant difference in mortality risk in obese recipients [HR = 1.24, 95% confidence interval (CI) = 0.90-1.70, studies = 5, n = 83 416]. However, obesity was associated with an increased risk of death-censored graft loss (HR = 1.06, 95% CI = 1.01-1.12, studies = 5, n = 83 416) and an increased likelihood of DGF (OR = 1.68, 95% CI = 1.39-2.03, studies = 4, n = 28 847). CONCLUSIONS: Despite having a much higher likelihood of DGF, obese transplant recipients have only a slightly increased risk of graft loss and experience similar survival to recipients with normal BMI.


Asunto(s)
Fallo Renal Crónico/cirugía , Trasplante de Riñón , Obesidad/complicaciones , Receptores de Trasplantes , Índice de Masa Corporal , Funcionamiento Retardado del Injerto/etiología , Supervivencia de Injerto , Humanos , Fallo Renal Crónico/mortalidad , Factores de Riesgo , Tasa de Supervivencia , Resultado del Tratamiento
13.
Practitioner ; 259(1779): 19-23, 2-3, 2015 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-25816501

RESUMEN

Chronic kidney disease (CKD) is defined as either a reduction in measured kidney function (eGFR) or urinary abnormalities (haematuria/proteinuria) or a combination of both, present for more than 3 months. In the most recent NICE guidelines the various CKD stages 1-5 are now represented by G (for GFR) categories (G1-5) which have the same eGFR thresholds as previous CKD guidelines. The urinary albumin:creatinine ratio (ACR) category is denoted as A (for albuminuria) with three categories: A1, A2 or A3. The ACR category has been introduced to emphasise that patients with higher levels of albuminuria have an increased risk of progression to end-stage renal disease. Individuals with newly identified reduced eGFR should have acute kidney injury excluded. All newly identified CKD patients should have blood pressure, dipstick urinalysis, random urine ACR or urine protein:creatinine ratio (PCR), glucose, cholesterol and full blood count checked at the earliest opportunity. An ultrasound scan should be offered to patients at increased risk. Cardiovascular events and progression of CKD are more common if albuminuria or proteinuria is present. Urine ACR has a greater sensitivity for low levels of proteinuria in comparison with PCR. Referral for patients with CKD should be based on assessment of kidney function (eGFR), the severity of proteinuria (urine ACR), concerns about poorly controlled BP, or suspected inherited renal disease. Most cases of CKD in the elderly are caused by the cumulative effect of other disease states, especially hypertension and atherosclerosis. The CKD classification system will identify many elderly patients with a low eGFR but without progressive kidney failure.


Asunto(s)
Insuficiencia Renal Crónica/diagnóstico , Diagnóstico Precoz , Hematuria/diagnóstico , Humanos , Proteinuria/diagnóstico
14.
Am J Nephrol ; 39(4): 297-305, 2014.
Artículo en Inglés | MEDLINE | ID: mdl-24732139

RESUMEN

BACKGROUND: It is now common for individuals to require dialysis following the failure of a kidney transplant. Management of complications and preparation for dialysis are suboptimal in this group. To aid planning, it is desirable to estimate the time to dialysis requirement. The rate of decline in the estimated glomerular filtration rate (eGFR) may be used to this end. METHODS: This study compared the rate of eGFR decline prior to dialysis commencement between individuals with failing transplants and transplant-naïve patients. The rate of eGFR decline was also compared between transplant recipients with and without graft failure. eGFR was calculated using the four-variable MDRD equation with rate of decline calculated by least squares linear regression. RESULTS: The annual rate of eGFR decline in incident dialysis patients with graft failure exceeded that of the transplant-naïve incident dialysis patients. In the transplant cohort, the mean annual rate of eGFR decline prior to graft failure was 7.3 ml/min/1.73 m(2) compared to 4.8 ml/min/1.73 m(2) in the transplant-naïve group (p < 0.001) and 0.35 ml/min/1.73 m(2) in recipients without graft failure (p < 0.001). Factors associated with eGFR decline were recipient age, decade of transplantation, HLA mismatch and histological evidence of chronic immunological injury. CONCLUSIONS: Individuals with graft failure have a rapid decline in eGFR prior to dialysis commencement. To improve outcomes, dialysis planning and management of chronic kidney disease complications should be initiated earlier than in the transplant-naïve population.


Asunto(s)
Tasa de Filtración Glomerular , Fallo Renal Crónico/diagnóstico , Trasplante de Riñón , Complicaciones Posoperatorias/diagnóstico , Adulto , Estudios de Cohortes , Femenino , Humanos , Masculino , Persona de Mediana Edad , Diálisis Renal
15.
J Clin Med ; 13(4)2024 Feb 07.
Artículo en Inglés | MEDLINE | ID: mdl-38398266

RESUMEN

Background: There is increasing evidence that cardiac screening prior to kidney transplantation does not improve its outcomes. However, risk aversion to perioperative events means that, in practice, testing remains common, limiting the availability of 'real-world' data to support any change. Our objective was to assess perioperative and 1-year post-transplant cardiovascular events in a kidney transplant candidate cohort who received minimal cardiovascular screening. Methods: The retrospective cohort study included all adult kidney-only transplant recipients in a single UK region between January 2015 and December 2021. Kidney transplant recipients asymptomatic of cardiac disease, even those with established risk factors, did not receive cardiac stress testing. The perioperative and 1-year post-transplant cardiovascular event incidences were examined. Logistic regression was used to identify variables of statistical significance that predicted cardiovascular or cerebrovascular events. Results: A total of 895 recipients fulfilled the inclusion criteria. Prior to transplantation, 209 (23%) recipients had an established cardiac diagnosis, and 193 (22%) individuals had a diagnosis of diabetes. A total of 18 (2%) patients had a perioperative event, and there was a 5.7% incidence of cardiovascular events 1 year post-transplantation. The cardiovascular mortality rate was 0.0% perioperatively, 0.2% at 3 months post-transplant, and 0.2% at 1 year post-transplant. Conclusions: This study demonstrates comparable rates of cardiovascular events despite reduced screening in asymptomatic recipients. It included higher risk individuals who may, on the basis of screening results, have been excluded from transplantation in other programmes. It provides further evidence that extensive cardiac screening prior to kidney transplantation is unlikely to be offset by reduced rates of cardiovascular events.

16.
Am J Kidney Dis ; 62(3): 604-14, 2013 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-23489674

RESUMEN

Activation of the complement pathway is implicated in the pathogenesis of many kidney diseases. The pathologic and clinical features of these diseases are determined in part by the mechanism and location of complement activation within the kidney parenchyma. This review describes the physiology, action, and control of the complement cascade and explains the role of complement overactivation and dysregulation in kidney disease. There have been recent advances in the understanding of the effects of upregulation of the complement cascade after kidney transplantation. Complement plays an important role in initiating and propagating damage to transplanted kidneys in ischemia-reperfusion injury, antibody-mediated rejection, and cell-mediated rejection. Complement-targeting therapies presently are in development, and the first direct complement medication for kidney disease was licensed in 2011. The potential therapeutic targets for anticomplement drugs in kidney disease are described. Clinical and experimental studies are ongoing to identify further roles for complement-targeting therapy.


Asunto(s)
Vía Alternativa del Complemento/inmunología , Vía Clásica del Complemento/inmunología , Proteínas del Sistema Complemento/metabolismo , Enfermedades Renales/diagnóstico , Enfermedades Renales/inmunología , Adulto , Proteínas del Sistema Complemento/inmunología , Femenino , Humanos , Enfermedades Renales/metabolismo
17.
J Am Soc Nephrol ; 23(11): 1891-9, 2012 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-23064017

RESUMEN

The impact of variation within genes responsible for the disposition and metabolism of calcineurin inhibitors (CNIs) on clinical outcomes in kidney transplantation is not well understood. Furthermore, the potential influence of donor, rather than recipient, genotypes on clinical endpoints is unknown. Here, we investigated the associations between donor and recipient gene variants with outcome among 4471 white, CNI-treated kidney transplant recipients. We tested for 52 single-nucleotide polymorphisms (SNPs) across five genes: CYP3A4, CYP3A5, ABCB1 (MDR1; encoding P-glycoprotein), NR1I2 (encoding the pregnane X receptor), and PPIA (encoding cyclophilin). In a discovery cohort of 811 patients from Birmingham, United Kingdom, kidney donor CC genotype at C3435T (rs1045642) within ABCB1, a variant known to alter protein expression, was associated with an increased risk for long-term graft failure compared with non-CC genotype (hazard ratio [HR], 1.69; 95% confidence interval [CI], 1.20-2.40; P=0.003). No other donor or recipient SNPs were associated with graft survival or mortality. We validated this association in 675 donors from Belfast, United Kingdom (HR, 1.68; 95% CI, 1.21-2.32; P=0.002), and in 2985 donors from the Collaborative Transplant Study (HR, 1.84; 95% CI, 1.08-3.13; P=0.006). In conclusion, these data suggest that an ABCB1 variant known to alter protein expression represents an attractive candidate for future study and risk stratification in kidney transplantation.


Asunto(s)
Miembro 1 de la Subfamilia B de Casetes de Unión a ATP/genética , Trasplante de Riñón/efectos adversos , Polimorfismo de Nucleótido Simple , Subfamilia B de Transportador de Casetes de Unión a ATP , Adulto , Inhibidores de la Calcineurina , Estudios de Cohortes , Ciclofilinas/genética , Citocromo P-450 CYP3A/genética , Femenino , Estudios de Asociación Genética , Supervivencia de Injerto/genética , Humanos , Estimación de Kaplan-Meier , Trasplante de Riñón/mortalidad , Trasplante de Riñón/fisiología , Desequilibrio de Ligamiento , Masculino , Persona de Mediana Edad , Receptor X de Pregnano , Receptores de Esteroides/genética , Factores de Riesgo , Donantes de Tejidos , Reino Unido/epidemiología
18.
Practitioner ; 257(1758): 13-7, 2, 2013 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-23577515

RESUMEN

Chronic kidney disease (CKD) is efined as a reduction in estimated glomerular filtration rate (eGFR) for three consecutive months, or evidence of kidney damage alone with preserved renal function. CKD affects 8.5% of the UK population. Early recognition allows intervention that may delay or avoid progression to end-stage disease and modify the cardiovascular risk associated with CKD. CKD is classified into five stages and the majority of individuals have stages 1-3, many of these will never progress to end-stage renal disease. A decline in with age is expected. The most frequent specific renal diseases resulting in progressive CKD in the UK are: diabetes mellitus, atheromatous renal vascular disease, glomerulonephritis, chronic pyelonephritis and inherited renal disease. Laboratories in the UK now routinely provide an eGFR with a serum creatinine value in all adult patients. This estimation is based on serum creatinine, age, gender, and ethnicity. Baseline assessment in a patient with newly diagnosed CKD should include: blood pressure, dipstick urinalysis, urine ACR or PCR, glucose, lipid profile and a full blood count. Fluctuation in renal function is common, particularly in elderly patients with CKD. A fall in eGFR can result from any intercurrent illness, medication, or volume depletion. Proteinuria is a very important prognostic marker in CKD, ACR is the preferred measure as it has greater sensitivity for lower levels of proteinuria and is the recommended method in those with diabetes. The potential health problems associated with CKD can be divided into two main categories: risk of progressive renal disease with the development of renal bone disease and renal anaemia, and risk of overt cardiovascular disease.


Asunto(s)
Insuficiencia Renal Crónica , Adulto , Progresión de la Enfermedad , Diagnóstico Precoz , Humanos , Insuficiencia Renal Crónica/diagnóstico , Insuficiencia Renal Crónica/epidemiología , Insuficiencia Renal Crónica/patología , Índice de Severidad de la Enfermedad
19.
Healthcare (Basel) ; 11(4)2023 Feb 14.
Artículo en Inglés | MEDLINE | ID: mdl-36833100

RESUMEN

Renal transplantation is the gold-standard treatment for adolescents and young adults with end-stage renal disease. Despite enjoying excellent short-term outcomes, they suffer the worst rates of premature transplant function loss. Health behaviors: such as lack of adherence to immunosuppressive medications, are felt to be the major contributory factor. Understanding the educational needs of young renal transplant recipients allows healthcare practitioners to better support patients in managing their chronic disease. The aim of this scoping review was to understand what is known about their educational needs. A scoping review methodology was followed. Following an online search, study titles, and abstracts were screened for eligibility, followed by full-text assessment and data extraction. Data were qualitatively analyzed using thematic analysis. A total of 29 studies were included in the scoping review. In young people who struggled with self-management, three themes were identified (1) the Needs of the disrupted youth, (2) the Needs of the disorganized youth (3) the Needs of the distressed youth. There was a paucity of research to identify the protective factors that enable young recipients to successfully manage their health. This review outlines current knowledge of the patient education needs of young transplant recipients. It also highlights remaining research gaps that will need to be addressed with future research.

20.
PLoS One ; 18(7): e0288807, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37459325

RESUMEN

BACKGROUND: Adolescence and young adulthood are high risk periods for kidney transplant recipients. The reasons for this are complex; but are predominantly thought to be due to poor adherence to immunosuppressive medications. Patient education can help support young recipients to reduce their risk of behaviour-related transplant loss. The aim of this review was to understand what is known about education interventions targeted at adolescent and young adult kidney transplant recipients. METHODS: Systematic scoping review methodology was utilised. Six online databases were searched for suitable articles. Articles were selected for full text review following title and abstract screening. Articles deemed eligible to be included in the review had data extracted, which were qualitatively analysed using thematic analysis. Findings were validated through a consultation exercise with both young recipients and healthcare professionals. RESULTS: 29 studies were eligible for inclusion in the review. There was a high level of heterogeneity in the content, mode, design, and measurement of efficacy of interventions in the selected studies. Traditional face-to-face education and transition clinics were the most common educational interventions. Using technology to enhance patient education was also a major theme identified. Few studies reported using educational theory or involving patients in intervention design. DISCUSSION: Four key research gaps were identified. 1.) Lack of educational theory in intervention design 2.) Lack of patient/ stakeholder involvement 3.) Identifying best way to measure efficacy 4.) identifying novel future research questions within already well established paediatric and educational frameworks. Addressing these gaps in future research will help inform best-practice in this vulnerable population.


Asunto(s)
Trasplante de Riñón , Humanos , Niño , Adolescente , Adulto Joven , Adulto , Educación del Paciente como Asunto , Escolaridad , Personal de Salud/educación
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