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Showing 1-14 of 14 trials
NCT05756036
To seek an association between Torque Teno Virus DNA titres resulting from under or over-immunosuppression in a kidney allograft recipient, Graft rejection, both cell-mediated rejection and antibody-mediated rejection, donor-specific antibodies (DSA), the incidence of BK viraemia and BK nephropathy, CMV infection or diseases and PCP infection and the number of circulating NK, B and T lymphocyte subtypes.
NCT06438107
The goal of this observational study is to determine phenotypic, transcriptional, and epigenetic underpinnings of renal allograft rejection in renal transplant rejection. The main questions it aims to answer are: * To determine the phenotype, frequency, location, and the inter-cellular interactions between the cells that constitute intra-graft inflammatory infiltrate in acute ejection. * To determine the phenotype, frequency, location, and the inter-cellular interactions between the cells that constitute intra-graft inflammatory infiltrate in recurrent/recalcitrant rejection vs. rejection that resolves with therapy. * To generate a scRNA sequencing (scRNAseq) map of the intra-graft immune cells and the renal parenchymal cells and compare the transcriptional and epigenetic changes within these cells in recurrent/recalcitrant rejection vs. rejection that resolves with therapy. * To determine phenotypic changes associated with chronic rejection. Participants will be asked to provide the following research specimens: * Renal biopsy specimens at the following timepoints: day of transplantation (pre-implantation and post-perfusion); routine protocol biopsies at 3 months and 12 months; and clinically indicated for-cause biopsies at any timepoint from time-0 to 1-yr post-transplantation. The 1st research core will be used for routine histopathological examination and left over tissue from this core will be used for deep phenotyping using multiparameter immunophenotyping, and digital spatial profiling. The second research core will be used for extraction of cells and nuclei for scRNAseq and snATACseq. * Blood samples will be processed to obtain plasma (for cytokine, chemokine and DSA measurements) and PBMC (for deep phenotyping and molecular analyses). For each collection timepoint, up to 75 mL (about 5 tablespoons) will be collected. * Prospective clinical data and outcomes will be collected from participant medical records. * Follow-Up Period: For-cause biopsies from 1-yr to 5-yr post-transplantation (by the transplant nephrologist): no additional cores will be obtained for research from these biopsies. The left-over tissue from the clinically indicated biopsy cores will be analyzed by deep phenotyping and digital spatial profiling. Blood samples will be processed to obtain plasma (for cytokine, chemokine and DSA measurements) and PBMC (for deep phenotyping and molecular analyses).
NCT03719339
The objective of the VIRTUUS Children's Study is to adapt identified and validated adult noninvasive diagnostic and prognostic biomarkers for the characterization of allograft status in pediatric recipients of kidney allografts.
NCT02377193
Induction therapy by either T-cell depleting polyclonal antibodies such as anti-thymocyte globulins (ATG) or non-depleting anti-interleukine 2 receptor monoclonal antibodies (anti-CD25 moAb: basiliximab or daclizumab) are used to prevent acute rejection, especially in highly sensitized patients. Both induction therapy regimens have a different tolerance profile. Infections and haematological side-effects are more frequently reported in patients receiving ATG. The aim of the pilot study is to evaluate ATG and basiliximab induction therapy in de novo sensitized kidney-transplant patients (incompatible grafts rate ≥ 50%) without donor specific antibodies (DSAs) detected by Luminex.
NCT04530630
This is an open-label study, where participants will be switched from their current HIV medication to the study drug, BIC/F/TAF. Open-label means both the investigator and the participant will know what drug will be given. Participants will be followed for 48 weeks in order to monitor the efficacy, safety and tolerability of BIC/F/TAF. The investigator hypothesizes that BIC/F/TAF will be an important addition to the management of HIV-positive post renal transplant patients, especially since it is a one pill daily dosing regimen, thereby decreasing the pill burden in this population.
NCT03991780
A Phase 2, Pilot Study to Assess the Safety and Efficacy of Fostamatinib in the Treatment of Chronic Active Antibody Mediated Rejection in Renal Transplantation
NCT01239472
Currently, acute kidney injury is diagnosed by increased serum creatinine. However, creatinine is not a reliable marker for acute changes in renal function. The biology of the renal graft is influenced by chemokines from reperfusion (just after the kidney transplant) and throughout its course, when acute and chronic inflammatory changes occurs. Moreover, the evaluation of changes in urinary cytokines reflects kidney interstitial patterns, and can predict renal function, acute rejection episodes and their response to treatment. Today there are several studies comparing the relative immunosuppression of renal function, but few noticed its relationship with cytokines and chemokines. Thus, we proposed studying the inflammatory consequences of early calcineurin inhibitors (ICN) withdrawing in transplant patients by urine analysis. Kidney biopsy was done before ICN withdrawn and replaced by everolimus (3 months after transplant), and 1 year after transplant.
NCT02500251
This study is a prospective, open label, phase I/II pilot study.
NCT02581436
This study evaluates the addition of "Kidney Solid Organ Rejection Test" (kSORT), in the clinical follow-up of renal transplant recipients, compared to clinical standard surveillance in the first two years after kidney transplantation. The design of the study is a partially blinded, randomized control trial of patients with living and deceased donor. The recruitment will be in a third level attention hospital in Mexico city (Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán). The main outcomes are the rate and grade of acute rejection, histologic chronic index of the one year protocol biopsy and glomerular filtration rate.
NCT02409940
Despite being a miracle of modern medicine, solid organ transplant recipients are always at risk of rejection, and remain dependent on lifelong immunosuppression. Currently used immunosuppressive drugs suppress the potential of immune system and interfere with the metabolism of medications. Cellular therapies currently being investigated for this purpose require the use of ablative radiotherapy. The investigators are using a less toxic strategy by harnessing the immunosuppressive potential of the MSCs in the Kidney Transplant (KTx) recipients and studying immunomodulation mediated by these cells in the KTx patients. Hypothesis MSCs interfere with signalling of Immune cells like T cells, B cells and Dendritic cells which leads to improve graft survival of renal transplant patients. Aim To investigate effect of MSCs on immune cell repertoire in a donor specific mediated response. The investigators aim to collect peripheral blood from 30 patients (10 patients for autologous cell infusion and 10 for allogeneic (donor derived cell infusion) at various time intervals following MSC therapy. 10 patients serve as controls on standard dose of drugs but without MSC infusion. This peripheral blood would be utilized for isolation of mononuclear cells and performing various immune assays on these cells in a donor specific response.
NCT02490020
Although donation after cardiac death(DCD) is the major source of renal transplantation in China, high incidence rate of rejection and delayed graft function(DGF) is existing due to the prolonged ischemia time. According to the previous single center study, mesenchymal stem cell (MSC) had an effect to prevent rejection and DGF after renal transplantation, but there was no perspective multicenter controlled study to confirm it. This perspective multicenter controlled study will focus on clarifying the key role of MSC applied via renal arterial or peripheral vein injection, to reduce the rejection and DGF after renal transplantation. The investigators have established GMP workshop and solid research foundation of transplant rejection. This study will provide a new reasonable way for immune induction of renal transplantation by DCD.
NCT01413685
The purpose is to define if calcineurin activity is a better biological parameter than blood concentration for the therapeutic tacrolimus monitoring.
NCT00695097
The aim of the study is to find out if Rituximab, which is an antibody against specific white cells involved in rejection, when combined with standard anti-rejection treatment can more effectively reverse the rejection process. Our hypothesis is that with acute rejection there is activation of B cells and the subsequent development of anti-donor antibodies that ultimately lead to graft loss. More effective therapy targeted at B cells may abort the development of anti-HLA antibodies, prevent renal injury and have a favorable effect on long-term graft outcome.
NCT00805909
The purpose of the study is to determine the safety and tolerability of NI-0401 and whether NI-0401 can reverse BpACR.