Evaluation of the Level of Expression of CD45RC on T Lymphocytes as a Predictive Biomarker of Acute Rejection After Renal Transplantation (ECLAT)

June 10, 2024 updated by: University Hospital, Angers

Chronic renal failure is a major public health problem in industrialized countries, due to its frequency - about 3 million patients in France - and its socio-economic impact. At the end stage of renal failure, renal transplantation is the best treatment, allowing an improvement in patient survival compared to treatment by extra-renal purification. Despite improved immunosuppressive strategies, allograft rejection is common in transplantation - between 15% and 25% in the first year - and is associated with lower renal graft survival.

Different risk factors for rejection have been well identified, such as the young age of the recipient or a high number of human leukocyte antigen (HLA) incompatibilities between the donor and the recipient. However, these risk factors do not accurately identify the risk of acute rejection in order to optimize and individualize immunosuppressive strategies.

Also, the search for biomarkers to predict allograft tolerance prior to transplant is a major goal in renal transplantation.

The onset of acute rejection is caused by the ability of the recipient's T cells to recognize alloantigens. The CD45 molecule is a highly expressed tyrosine phosphatase on the surface of the lymphocytes that plays an important role in the activation of the T cell.

Investigators showed that the level of expression of CD45RC on T lymphocytes was associated with the risk of acute rejection. Thus, from a retrospective cohort of 89 renal transplant patients followed, recipients with a high percentage of circulating CD8 lymphocytes expressing high CD45RC (CD45RChigh) before transplant had a 5 to 8-fold higher risk of developing acute rejection of allograft during follow-up (11-year average follow-up) compared to recipients with a low percentage of CD8+CD45RChigh.

The purpose of this study is to confirm the first retrospective results on a larger prospective and contemporary regional cohort.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
150

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 70 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Patients over 18 and under 70 years old
  • Patients in care for a first priority renal transplant.
  • Patients with low immunological risk
  • Patients with prior written informed consent

Exclusion Criteria:

  • Poor understanding of the French language
  • Pregnant, breastfeeding or partying women
  • Persons deprived of liberty by an administrative or judicial decision
  • Persons undergoing psychiatric care under duress
  • Adults who are subject to a legal or non-state protection measure to express their consent

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Screening
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Other: Patient in need of a kidney transplant
Other: Blood samples
Blood samples the day of the surgery and 4 times during the next year. Blood samples and histological slides taken at each biopsy and if there is suspicion of rejection of the graft

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Number of patient with acute rejection diagnosis confirmed by anatomopathological analysis of a graft biopsy
Time Frame: 12 months
12 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Rate of CD45RC for patient with acute rejection suspicion
Time Frame: 12 months
acute rejection confirmed or not
12 months
Rate of CD45RC on circulating T lymphocytes
Time Frame: from date of randomization until the date of acute rejection, up to 12 months
Evolution of the expression of CD45RC in the first year after introduction of immunosuppressive therapy
from date of randomization until the date of acute rejection, up to 12 months
Rate of CD45RC on circulating T lymphocytes the day of acute rejection
Time Frame: 12 months
day of acute rejection
12 months
Rate of CD4, CD8, CD45RA, CD25, CD127, CD19 markers on T cells the day of acute rejection
Time Frame: 12 months
day of acute rejection
12 months
anti-HLA antibodies' dosage at the time of acute rejection
Time Frame: 12 months
12 months
cytokines' dosage
Time Frame: Day 1
describe cytokine profile
Day 1

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University Hospital, Angers

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
February 3, 2021

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
February 2, 2025

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
February 2, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
June 11, 2019

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 19, 2019

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
June 21, 2019

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
June 11, 2024

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 10, 2024

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
June 1, 2024

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 49RC18_0018

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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