Clinical Trials Logo

Clinical Trial Details — Status: Withdrawn

Administrative data

NCT number NCT05073822
Other study ID # 140986
Secondary ID
Status Withdrawn
Phase Phase 1/Phase 2
First received
Last updated
Start date February 20, 2023
Est. completion date February 20, 2027

Study information

Verified date May 2023
Source University College, London
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

Kidney transplantation provides the optimal form of kidney replacement therapy for the majority of people with end-stage kidney disease, and has now become the commonest form of kidney replacement therapy. However, donor and recipient demographics have changed considerably over the past few decades: increasingly older donor kidneys are transplanted into progressively older recipients with greater comorbidities. Increasing age remains a major risk factor for death after kidney transplantation, with the commonest causes of deaths for recipients aged 70 and over being cardiovascular, infection, and malignancies. Immunosuppressant drugs which are critical for the maintenance of the transplanted organ can contribute to increased morbidity and mortality, by direct effects or through lowered immunity predisposing to infection. Cytomegalovirus (CMV) is one of the most common opportunistic infections that affects renal transplant patient outcome and can be monitored prospectively. Hence, minimising immunosuppression, especially in older recipients, may result in better graft and patient outcomes as many side-effects are dose dependant. However, to date drug doses have never been adjusted based on age, despite significant changes that occur to immune responsiveness as patients grow older. In addition , researchers have not had a biomarker to help define appropriate immunosuppressive levels for each individual. The investigators therefore aim to study the effect of reducing the target immunosuppression drug levels( of tacrolimus and mycophenolate) in kidney transplant recipients >60 years, using CMV viraemia as a main outcome measure, and investigating rates of rejection and development of de novo donor-specific anti-HLA antibodies. The investigators will assess the clinical utility of donor-derived cell free DNA (dd-cfDNA) as a means to guide immunosuppression minimisation. The investigators propose that the use of lower doses of immunosuppression will result in fewer infection-related complications, translating to improved patient outcomes. The research will be carried out in kidney transplant centres where prospective CMV monitoring is practiced.


Description:

Older kidney transplant recipients are at increased risk of infection and death from infectious causes compared to younger transplant recipients, and despite knowledge of age related immunological changes, the immunosuppressive protocol for older recipients was not yet adjusted. Our provisional data suggest that standard dose immunosuppression in the older patients results in more infections and fewer rejection episodes. Achieving a better balance by reducing risk of infection would be highly desirable. Defining age-specific target drug levels and doses should therefore be tested in a formal trial to establish its validity. Transplant recipients are especially at risk from viral and opportunistic infections; CMV is a particular problem, as infections can be both donor-derived or due to re-activation of latent virus in the recipient. In the transplant population, CMV infection can cause significant morbidity, including bone marrow suppression, pneumonitis, colitis, retinitis and encephalitis, and as a consequence, increased mortality. However, as this will be measured prospectively, it can also be utilised as a marker of the degree of ( over) immunosuppression in our patients. There are no current recommendations regarding optimal dose or target drug levels, and importantly, no age-specific standards. This trial could provide some specific recommendations. There is an increasing body of evidence that demonstrates age-related changes to the immune system, termed immunosenescence, characterized by reduced responsiveness to both newly and previously encountered antigens. In transplantation, it is thought that such immunosenescence may influence both the immune response of the recipient and the immunogenicity of the donor organ. Understanding if this is in any way related to physical frailty may be helpful in informing patients of risk of transplantation. Donor-derived cell-free DNA (dd-cfDNA) detected in the plasma of transplant recipients has been increasingly reported as a noninvasive biomarker of acute rejection(AR)-with transplant organ damage leading to release of more of the donor DNA into the bloodstream. A recent systematic review showed that all but one of 48 relevant studies reported significant elevations of dd-cfDNA at the time of biopsy-proven AR (BPAR), with successful treatment of AR resulting in restoration of dd-cfDNA levels back to baseline. Furthermore, a rise in dd-cfDNA can be detected before the clinical manifestations of rejection, with elevated levels seen up to a month or more before diagnosis of BPAR in some studies. Using the stability of the marker( a lack of rise) as a means of customising therapy has not been attempted, and our study could provide the rationale for this strategy.


Recruitment information / eligibility

Status Withdrawn
Enrollment 0
Est. completion date February 20, 2027
Est. primary completion date February 20, 2027
Accepts healthy volunteers No
Gender All
Age group 60 Years to 85 Years
Eligibility Inclusion Criteria: 1. Participant must be first time adult recipients of either a deceased or living donor kidney transplant. 2. Participant must be a recipient of a single organ transplant only. 3. Participant must be above the age of 60 years. 4. Participant must have a negative screen for donor-specific antibody prior to transplantation (MFI<2000). Exclusion Criteria: 1. Recipients of a transplant who are highly sensitised (cRF >85%). 2. Inability to participate in frequent monitoring of renal transplant function and clinical visits (every 4 weeks) during dd-cfDNA monitoring and IS minimisation. 3. Participants with immune-mediated renal disease in which IS minimisation is inadvisable. 4. EBV negative recipient (as IS minimisation is part of standard protocol) 5. Inability to comply with study directed treatment

Study Design


Related Conditions & MeSH terms


Intervention

Drug:
Tacrolimus
reduction of both standard Tacrolimus & Mycophenolate mofetil does in one arm

Locations

Country Name City State
n/a

Sponsors (1)

Lead Sponsor Collaborator
University College, London

Outcome

Type Measure Description Time frame Safety issue
Primary CMV viraemia Incidence of CMV viraemia as defined as any detectable virus by (PCR) above the threshold of 200 copies/ml in 1st year one year
Secondary Incidence of biopsy-proven acute rejection 1.Incidence of biopsy-proven acute rejection by 12 months after randomization 1 year
See also
  Status Clinical Trial Phase
Completed NCT03140514 - Urine CXCL10 Chemokine Monitoring Post-renal Transplant N/A
Completed NCT02581436 - Testing Immunosuppression Threshold in Renal Allografts To Extend eGFR N/A
Active, not recruiting NCT02409940 - To Elucidate the Effect of Mesenchymal Stem Cells on the T Cell Repertoire of the Kidney Transplant Patients Phase 1
Completed NCT02377193 - Simulect Versus ATG in Sensitized Renal Transplant Patient Phase 4
Completed NCT00771745 - Prospective Pilot Study of Pre-Transplant Thymoglobulin Administration in Living Donor Renal Transplant Recipients Phase 4
Not yet recruiting NCT05385432 - Induction in Sensitized Kidney Transplant Recipients Without Pre-existing Donor-specific antiboDies Phase 3
Completed NCT01953120 - Mechanisms of Belatacept Effect on Alloimmunity and Antiviral Response After Kidney Transplantation (BMS IM 103-309) Phase 4
Terminated NCT01324934 - Efficacy and Safety of ATG-Fresenius Following a Renal Transplantation, Without Corticosteroids Phase 3
Terminated NCT00983645 - A Trial Comparing Prograf and Neoral Use in Kidney Transplant Recipients of Hispanic Ethnicity Phase 4
Active, not recruiting NCT04530630 - Switch to Bictegravir/Emtricitabine/Tenofovir Alafenamide After Renal Transplant Phase 4
Recruiting NCT03707262 - Study of Combined Kidney and Blood Stem Cell Transplant From a Brother or Sister Donor Phase 1/Phase 2
Completed NCT02006108 - Imaging Kidney Transplant Rejection Using Ferumoxytol-Enhanced Magnetic Resonance N/A
Recruiting NCT03991780 - Fostamatinib in the Treatment of Chronic Active Antibody Mediated Rejection Phase 1/Phase 2
Completed NCT02733029 - Contrast Enhanced Ultrasonography to Detect Human Renal Transplant Rejection Phase 2
Active, not recruiting NCT02057965 - Mesenchymal Stromal Cell Therapy in Renal Recipients Phase 2
Completed NCT00658073 - Induction Therapy With Autologous Mesenchymal Stem Cells for Kidney Allografts N/A
Terminated NCT03646344 - Heme Arginate in Transplantation Study Phase 3
Completed NCT02866682 - Prospective Study Comparing Brand and Generic Immunosuppression on Transplant Outcomes, Adherence, & Immune Response in Kidney Transplant Recipients Phase 4
Not yet recruiting NCT06438107 - Deep Phenotyping of the Renal Allograft to Prognosticate Clinical Outcomes
Completed NCT02500251 - Belimumab Impacting Transplant Eligibility Phase 1/Phase 2