View clinical trials related to Renal Transplantation.
Filter by:Acute allograft dysfunction is often observed in the first weeks after kidney transplantation. Renal biopsy is universally considered the gold standard procedure for differential diagnosis of acute allograft dysfunction secondary to intraparenchymal causes. Kidney biopsy, however, is an invasive procedure that is time and cost consuming. Moreover, it may but not contribute to clinical diagnosis in about 10% of cases because of the impossibility to perform the analysis or of inadequacy of the biopsy sample. Availability or readily applicable non-invasive procedures might therefore allow increasing the performance of differential diagnosis of allograft dysfunction. In the recent years, a novel US imaging technique, namely contrast-enhanced ultrasound (CE-US),has been developed. The agent used in this study, Sonovue microbubbles consist of a central sulphur hexafluoride core with a surrounding phospholipid monolayer and last for several minutes in the systemic circulation before spontaneous degradation with absorption of the gaseous component by the lungs and the phospholipid shell by the liver. With the use of gasfilled microbubbles that act as scatterers within the blood stream and the development of low-MI ultrasound techniques that allow the visualization of the bubbles without destroying them, it is possible to improve the depiction of vessels and have access to structural and functional information on the microcirculation. Moreover SonoVue microbubbles are not nephrotoxic and can be safely used to evaluate kidney disfunction. Thus, whether a. different patterns of parenchymal perfusion detected by CE-US can be associated with different patterns of renal graft involvement during acute renal function deterioration and b. whether, conversely, different patterns of parenchymal perfusion detected by CE-US may help predicting different patterns of renal involvement will be investigated in 20 deceased or living donor kidney graft recipients.
Metabolic syndrome (MS) is characterized by a series of metabolic and hemodynamic parameters such as hypertension (hypertension), abdominal obesity, dyslipidemia, abnormal glucose metabolism and insulin resistance, resulting in increased cardiovascular morbidity and mortality and the risk for developing type 2 diabetes mellitus (T2DM). Metabolic syndrome is a common event after renal transplantation. The prevalence of MS increases post-transplant with weight gain. In renal transplant recipients, the SM is associated with CVD, diabetes after transplantation, worsening renal function and graft loss. Immunosuppressant medications have primary effect on the pathophysiology of MS. Several studies have evaluated the prevalence and impact of metabolic syndrome in renal transplant recipients as obesity, hypertension, dyslipidemia and use of immunosuppressants. The objectives of this study are to determine whether the determination of the metabolic syndrome at 6 months predicts this same condition at 12 months, determine the prevalence of metabolic syndrome at 12 months, to assess the prevalence of obesity and overweight in this population and to assess the prevalence of diabetes mellitus after renal transplantation. Patients who meet the inclusion criteria and did not meet the exclusion criteria will be invited to participate in the study, signing the Instrument of Consent (IC) and informed about the objectives and procedures of the study to be performed, with age between 18 and 60 years, both sexes, renal transplant recipients Renal Transplant Unit, Hospital das Clinicas, FMUSP living donor or deceased and use of immunosuppressive regimen consisting of tacrolimus, mycophenolate sodium and prednisone. Sampling will be conducted laboratory tests, filling out questionnaires on quality of life and anthropometric measures.
The purpose of this study is to evaluate and compare the safety and efficacy of two drugs (ADVAGRAF® and PROGRAF® groups) in patients who received renal transplantation.
There is a critical gap in the knowledge on how to implement effective interventions for renal transplant recipients (RTRs) to improve immunosuppressant therapy (IST) adherence and clinical outcomes. The objectives of this project were to address this gap through: (1) designing, implementing, and evaluating a patient-specific behavioral contract intervention to improve RTRs' IST adherence rates (contracts are written, signed agreements between the RTR and healthcare provider in which the RTR agrees to be adherent to IST according to mutually agreed upon criteria); and (2) measuring the effects of IST adherence on RTRs' health-related quality of life (HQoL) and healthcare utilizations and costs. The primary hypothesis was that at one year post trial enrollment, RTRs who establish behavioral contracts with healthcare professionals will be more adherent than those who do not establish behavioral contracts and subsequently will have greater HQoL and lower healthcare utilizations and costs. Once it is better understood how to implement effective IST adherence intervention programs, clinicians will have a valuable tool to promote therapeutic success, improve HQoL, and reduce healthcare utilizations and costs. Therefore, we pursued the following Specific Aims: (1) determine the effectiveness of an IST adherence contract-based intervention on IST adherence; (2) determine the relationship between IST adherence, the intervention, and RTRs' HQoL; and (3) determine the influence of IST adherence and the intervention on RTRs' healthcare utilizations/costs. To achieve the Specific Aims, a randomized controlled trial of the patient-specific behavioral contract-based intervention was conducted, and data regarding adherence, HQoL, and healthcare utilizations/costs were collected over a 12-month period for each RTR study participant and analyzed. This project will promote healthy lives, increase well-being, and reduce burden of illness and disparity among adult RTRs by providing data regarding an adherence intervention and the impact of IST adherence and the behavioral contract intervention on RTRs' health and economic outcomes and HQoL. Collectively, this new knowledge will provide critical steps toward optimizing RTRs' graft maintenance, productivity, and HQoL, while decreasing graft rejection, return to dialysis, morbidity, mortality, and healthcare costs.
The study purpose is to determine the safety and efficacy of a belatacept-based immunosuppressive regimen (calcineurin inhibitor free) with alemtuzumab or rabbit antithymocyte globulin (rATG) induction and early glucocorticoid withdrawal (CSWD) and a belatacept-based immunosuppressive regimen with tacrolimus-based regimen with rabbit antithymocyte globulin induction and early glucocorticoid withdrawal in renal transplant recipients. The hypothesis is that a belatacept-based immunosuppressive regimen with alemtuzumab induction, mycophenolate mofetil (MMF)/mycophenolic acid (MPA), and early glucocorticoid withdrawal (Group A) in renal transplant recipients or Belatacept-based immunosuppressive regimen with rabbit antithymocyte globulin induction, MMF/MPA and early glucocorticoid withdrawal (Group B) will lead to less risk of graft loss, patient death, or reduced renal function at 12 months as compared to a tacrolimus-based immunosuppressive regimen with rabbit antithymocyte globulin, MMF/MPA, and early glucocorticoid withdrawal in renal transplant recipients (Group C).
The aims of this study are to extensively study the levels of CD25-Receptors saturation and expression obtained with 2 different doses of Simulect® in combination with Neoral® (i.e to demonstrate that saturation and expression vary according to the dose of Simulect® given), and to study the levels of CD25-Receptors saturation without Neoral® and compare them to the data with Neoral®. It will be conducted in low risk de novo adult renal transplant recipients until 12 weeks post-transplant, receiving either a cumulative dose of 40 or 80 mg of Simulect® in combination with Neoral®, or a cumulative dose of 80 mg of Simulect® in a calcineurin inhibitor free immunosuppressant therapy.
A pharmacokinetics and pharmacogenetics study to complement the current knowledge of tacrolimus prolonged release (Advagraf®) in the immediate post-transplantation period and at steady-state (M3 post transplantation) and to improve the optimal dose of Advagraf® based on tacrolimus AUC estimated by two Limited Samples Strategies during the first 3 months after renal transplantation. Data obtained with tacrolimus prolonged release will be compared with those of tacrolimus immediate release (Prograf®)
The purpose of this multi-center (observational) registry study is to establish a database of clinical and laboratory information that may help to identify any unique characteristics of tolerant participants that differ from participants who reject their kidney after discontinuing immunosuppressive drugs.
Hypomagnesemia is common in renal transplant recipients and is mainly because of enhanced renal magnesium wasting, caused by immunosuppressive drugs (calcineurin inhibitors). Glucose metabolism disorders, including insulin resistance and decreased insulin secretion, are also prevalent post-transplantation and often precede the development of diabetes. As magnesium supplementation has been demonstrated to increase insulin sensitivity in both diabetic and non-diabetic patients, its potential therapeutic supplementation (post-transplantation) deserves further examination. The hypothesis is that magnesium supplementation in renal transplant recipients exerts a beneficial effect on insulin resistance and/or secretion.
Sirolimus, 1 mg, white, triangular tablets (Rapamune®) was approved on 03 April 2007 in China for prophylaxis of organ rejection in renal transplantation. A pharmacokinetic (PK) study to be conducted in renal allograft recipients was requested by State Food and Drug Administration (SFDA) to provide further guidance for clinical use. To minimize risk to patients, this study is designed to collect blood PK samples from renal allograft recipients who are currently under sirolimus (1 mg tablets) treatment with or without concomitant medication(s). PK samples will be collected from these patients to characterize the steady state PK of sirolimus during sirolimus maintenance therapy. This study will not involve any changes to the established treatment regimen for the patients who enroll in the study