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67 active trials for Kidney Transplantation

Intravenous Immunoglobulins for Prevention of BKV Infection in Kidney Transplant Recipients According to BKV Genotype-specific Neutralizing Antibody Titers at the Day of Transplantation.

BK virus-associated nephropathy (BKVAN), a consequence of the strong immunosuppressive therapy given after kidney transplantation (KT), represents a growing medical problem in the KT setting. BKV replication occurs in 30-50% of recipients with progression to BKVAN in up to 10% of patients which ultimately leads to graft dysfunction and loss. Furthermore, early BKV replication after transplantation increases the risk of late acute rejection. At present, there are no BKV-specific antiviral therapies available. The current management of BKVAN relies on preemptive adaptation of immunosuppression according to viral load monitoring. However, due to its delayed nature, this empirical strategy is not always successful, and can increase the risk of donor specific antibodies, graft rejection and death. In a prospective longitudinal study, the investigators have demonstrated that the amount and kinetics of BKV genotype-specific neutralizing antibody (NAb) titers influence BKV disease severity after KT; and defined a cutoff NAb titer value of 4 log10 that allows stratification of recipients into lower and higher BKV disease risk groups prior to KT. Furthermore, our data on donor/recipient pairs provide support for the view reported by recent studies that early BKV replication in kidney transplant recipients is of donor origin. These data support the potential benefit of administering NAbs as a preventive strategy against BKV infection. The investigators and others have demonstrated the presence of high titers of BKV NAbs in commercial intravenous immunoglobulins (IVIG). The investigators further evaluated the titer of BKV NAbs in plasma samples of transplant recipients after administration of IVIG. The investigators demonstrated that all patients show an increase of NAb titers in plasma after IVIG administration. The aim of the investigators study is to investigate the efficacy of IVIG for prevention of BKV viremia after KT according to pre-transplant BKV genotype-specific NAb titers against the donor's BKV strain. The study is a multicentric prospective randomized open trial evaluating the impact of administration of IVIG for prevention of BKV viremia compared to no specific treatment in kidney transplant recipients harboring neutralizing antibody titers (NAbs) ? 4log10 against the BKV donor's genotype. Recipients harboring BKV NAb titer ? 4log10 against the BKV genotype of their matched donor and negative or non-detectable BKV load in blood at day of transplantation will be randomized to receive (experimental group) or not (control group) IVIG treatment. In the experimental group, patients will receive a single dose of IVIG at day 10+/- 4 days, day 41 +/- 7 days and day 62 +/- 7 days. The dose of IVIG is defined according the donor BKV genotype: genotype I: 0.4 g/Kg/day; genotype II and IV: 1g/kg/day. The incidence of BKV viremia (> 4 log10 copies/mL) 6 months after transplantation will be evaluated and compared between the two groups.

Start: June 2020

Preserve-Transplant Study

The aim of this study is to test if alkali treatment will preserve kidney graft function and diminish the progression of chronic kidney disease in renal transplant patients. Additionally the underlying mechanisms of nephrotoxicity of metabolic acidosis will be investigated in this cohort. This study is a multi-center, prospective, randomized, single-blind (patient), placebo-controlled interventional trial to test the superiority of alkali treatment in comparison to placebo on preservation of kidney function in 300 kidney transplant recipients. The duration of the study will be 2 years for the individual participant. The patients will be randomized into 2 arms: intervention arm (sodium hydrogen carbonate, product: Nephrotrans®) and placebo arm (placebo comparator). Several studies in CKD (chronic kidney disease) patients have shown that alkali therapy slows progression of CKD.

Start: June 2017

Envarsus XR® in Adolescent Renal Transplant Recipients

Adolescents commonly experience barriers to adherence that entail forgetfulness, distraction, poor planning, and scheduling problems. A once daily oral regimen may be superior to the current regimens that require twice daily dosing. It is currently unclear if Envarsus XR® would improve outcomes in adolescent organ transplant recipients. Each patient will receive tacrolimus (twice daily immediate release oral formulation) which they are using as part of their standard of care immunosuppressive regimen for a portion of the study and Envarsus XR® (a once daily extended-release oral tacrolimus formulation) for a portion of the study in a cross-over design. Besides the advantage to adherence behaviors, a sustained-release tacrolimus preparation may decrease burdensome side effects and increase quality of life. Following enrollment, each patient will be maintained in the study for 9 months.

Start: January 2019

Study of Eplets Matching in Kidney Transplantation

The rapid changes of tissue-typing technology, including the widely used of highly specific molecular typing methods and solid phase analysis technology for detection of alleles specific anti-HLA antibodies, promoted the selection of organ transplant recipients to a more accurate level and promoted the scientific development of organ transplant matching. At present, the graft survival rate has been greatly improved through the prevention and treatment of T-cell-mediated rejection (TCMR), but the humoral immune response, the main cause of late graft loss, is still not effectively controlled. HLA eplets matching is based on the principle that if a donor HLA antigen shares a specific epitope with a recipient's HLA antigen, that eplets will not be recognized as foreign and will therefore not provoke a humoral immune response. The selection of transplant recipients based on this principle can avoid antibody-mediated rejection (AMR), reduce sensitization after transplantation, and select the most appropriate organs to avoid pre-existing antibodies in the case of persisting HLA antibody positive recipients choosing. In this study, the HLA high-resolution typing data of kidney transplant recipients from 2014 to the end of 2017 were analyzed with HLA Matchmaker for eplets mismatching number. To analyze the incidence of dnDSA and AMR after kidney transplant recipients with different eplets mismatching number posttransplant, and to elucidate the important role of tissue configuration patterns based on HLA eplets matching in long-term graft survival.

Start: April 2019

Functional Non Specific Immunity Monitoring After Kidney Transplantation Using an Interferon Gamma Test

The best renal replacement therapy is kidney transplantation. It improves end-stage renal kidney disease (ESRD) patients quality of life and increases their survival, but still remains risky. Morbidity in kidney transplantation is dominated by two main complications : acute graft rejection and infections. To maintain an accurate balance between rejection and infection, immunosuppressive therapy must to be used with caution and kept into a tight spectrum. The investigators dispose of a new test measuring interferon gamma production after T cells and Natural Killers (NK) in vitro stimulation : QuantiFERON Monitor® (QFM). They hypothesized QFM monitoring could improve management after kidney transplantation providing functional immune data to optimize balance between rejection and infection. The investigators aim to assess whether QFM could be an objective biomarker to predict infection and rejection risks after kidney transplantation.

Start: August 2019

Economic Evaluation of an Education Platform for Patients With End-stage Renal Disease

1600 patients with severe, end stage renal disease or post transplant will be randomised 1:1:1 to either standard therapeutic education; or education using a specific app; or the enhanced interactive app using feedback messages. The total follow up duration is 18 months. Primary endpoint is the cost utility of using app-based therapeutic intervention, secondary endpoints are: compliance with treatment guidelines, app use (professionals and patients), budget impact analysis

Start: September 2017

Clinical Database Associated With a Biological Banking Accessible to Initiate Epidemiological and Translational Collaborative Researches in Kidney Transplantation

The French DIVAT (standing for Données Informatisées et VAlidées en Transplantation in french, and in English "Computerized and VAlidated Data in Transplantation" ) cohort was Kicked off in 1994 by the Transplantation Urology Nephrology Institute of the Nantes University Hospital in France. The primary objective of this multicenter computerized database was to enable prospective clinical and epidemiological research studies concerning kidney transplant recipients, particularly focusing on mid- and long-term clinical outcomes, therapeutic strategies and public health issues. The patient-case system of the DIVAT cohort allows the monitoring of medical records of all patient-specific and allograft-specific data, including bio-banking since 2005. Data are collected from the date of transplantation until the graft failure, at each scheduled outpatient visit or hospital admission motivating by a new clinical, therapeutical or biological expression. The DIVAT cohort contains information on more than 11000 transplant recipients between 1994 and today, issued from 8 French university hospitals centers (the DIVAT Network is organized by a consortium agreement). 18% of all patients underwent retransplantation and 11% of all kidney transplants originated from living donors. The DIVAT network heavily works to ensure a high-quality data collection with the aim of exploring adequately the complex post-transplantation process. The Divat network encourage collaborations and enables interested researchers to submit a research project by completing a request form available on the DIVAT website (http://www.divat.fr/en) describing the context, objectives and design of the study

Start: January 1994