Next Generation Sequencing to Detect Acute Rejection in Lung Transplant Patients. (NGS-ACRL)

February 19, 2022 updated by: Mario Nosotti, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico

Next Generation Sequencing for the Diagnosis of Acute Rejection in Patients Undergoing Lung Transplantation. Pilot Study for Comparative Longitudinal Descriptive Trial.

Lung transplantation is a consolidated treatment in selected patients with end-stage respiratory diseases; however, acute rejection remains an important cause of lung allograft loss and a risk factor for chronic allograft dysfunction. Histopathological examination of lung tissue is the gold standard for the diagnosis of acute rejection, therefore recipients undergo surveillance transbronchial biopsy and bronchoalveolar lavage after transplantation. However, the obtained tissue is sometimes inadequate for histopathology, and the endoscopic procedure can lead to complications (bleeding, pneumothorax). The quantification of donor-derived cell-free DNA (ddcfDNA) in the recipient plasma has shown to be increased in case of acute rejection, and could represent an early and non-invasive diagnostic marker to detect acute rejection. We planned to enroll all patients aged 18 to 65 years old enlisted for lung transplantation at our centre. Patients undergoing retransplantation and patients with a history of prior solid organ transplantation were excluded. The quantification of donor-derived cell-free DNA was performed 15 days and 3, 6, and 12 months after transplantation, concurrently with the routine surveillance bronchoscopies as per our protocol; the same analysis was also conducted in case of suspected clinical rejection.

Study Overview

Status

Active, not recruiting

Conditions

Intervention / Treatment

Detailed Description

The purpose of the study is the identification of a non-invasive post-transplantation acute lung rejection monitoring method, by identification of donor derived cell free DNA (ddcf-DNA) in the recipient's plasma. At the time of transplantation, the ddcf-DNA derived from lymphocytes present in the peripheral blood of the donor and recipient will be genotyped by analysis of about 300 single nucleotide polymorphisms (SNPs) with a high probability of being differently homozygous between donor and recipient, according to the frequencies in the population reported on genomic databases. During the post-transplant follow-up, the presence of ddcf-DNA will be monitored by identification of the donor's SNP in the free DNA extracted from the recipient's plasma using the next-generation sequencing (NGS) method. Levels of ddcfDNA in the recipient will be correlated with clinical and histological data obtained from routine 3, 6 and 12 month post-transplant surveillance lung biopsies. All patients enrolled in the study will sign a study-specific written informed consent.

-Timeline: T-1 (before lung transplantation): DNA genotyping of the recipient; T0 (lung transplantation): genotyping of donor DNA; T1, T2, T3, T4 (15 days, 3, 6, 12 months after lung transplantation): ddcfDNA research on recipient serum; Tr: in any case of clinical suspicion of acute cellular rejection. At T2, T3, T4 and Tr, surveillance trans-bronchial lung biopsies (TBBs) are also performed, as per our centre's standard post-transplant lung follow-up protocol.

-Sample size and statistical analysis: Proportion of ddcfDNA/recipient DNA: stable patients (pA): 0.01, patients with graft damage (pB): 0.30, proportion nA/nB: 3, Power (1-beta): 0.80, Alpha: 5%, Margin of non inferiority δ: 0.05. Population (A+B) : 48; for possible exit from the study we add 7 cases for a total of 55 patients.

Study Type

Observational

Enrollment (Anticipated)

55

Contacts and Locations

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

Study Locations

  • Italy
      • Milan, Italy, 20122
        • Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico

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

Ages Eligible for Study

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

Patients undergoing lung transplantation at Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy

Description

Inclusion Criteria:

  • Patients undergoing lung transplantation at our centre
  • Patients aged 18 to 65 years old
  • Written informed consent to partecipate in the study

Exclusion Criteria:

  • Patients undergoing retransplantation
  • Patients with a history of prior solid organ transplantation

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

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Lung transplantation recipients
Recipients aged 18 to 65 years old undergoing lung transplantation at Fondazione IRCCS Ospedale Policlinico Milano undergoing quantification of donor-derived cell-free DNA on serial plasma samples
Diagnostic test: Quantification of donor-derived cell-free DNA
Quantification of ddcfDNA on serial plasma samples during follow-up after lung transplantation

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Proportion ddcfDNA
Time Frame: 1 year
Proportion of the ddcfDNA on the recipient's plasma cell free DNA
1 year

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
ddcfDNA-clinical data correlation
Time Frame: 1 year
Clinical data on trans-bronchial lung biopsies, pulmonary functional tests, culture of bronchoalveolar lavage fluid, donor-specific anti-human leukocyte antigen antibodies.
1 year

Collaborators and Investigators

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

Sponsor

Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico

Collaborators

University of Milan

Investigators

  • Principal Investigator: Mario Nosotti, MD, Professor, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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)

October 4, 2018

Primary Completion (Anticipated)

November 1, 2022

Study Completion (Anticipated)

December 1, 2022

Study Registration Dates

First Submitted

February 19, 2022

First Submitted That Met QC Criteria

February 19, 2022

First Posted (Actual)

March 2, 2022

Study Record Updates

Last Update Posted (Actual)

March 2, 2022

Last Update Submitted That Met QC Criteria

February 19, 2022

Last Verified

February 1, 2022

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 1883/2018

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

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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