Prospera Test Evaluation in Cardiac Transplant (ProTECT) (ProTECT)

May 19, 2025 updated by: Natera, Inc.
The ProTECT registry is an observational longitudinal, multi-center study observing patients undergoing heart transplant for whom Prospera testing is part of routine clinical care, who are enrolled within 60 days of heart transplantation.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not 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.

Detailed Description

The ProTECT registry is an observational longitudinal, multi-center study observing patients undergoing heart transplant for whom Prospera™ testing is part of routine clinical care, who are enrolled within 60 days of heart transplantation. Patients who are enrolled in this study should have blood drawn for Prospera™ testing at regular intervals per routine clinical care. Prospera™ test results and results of surveillance endomyocardial biopsies, laboratory testing, echocardiograms, angiography and hemodynamic monitoring performed to monitor cardiac status and for signs of transplant rejection, as well as medications and post-transplant re-vascularization and surgical procedures will be recorded in the electronic case report form (eCRF). Patient management decisions, even those informed by the Prospera™ test result, are made based on the individual judgment of the healthcare providers participating in the study.

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.
Observational

Enrollment (Actual)

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.
411

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 Locations

  • United States
    • California
      • San Carlos, California, United States, 94070
        • Natera

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

14 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Heart Transplantation Patients

Description

Patients must meet all the following criteria to be eligible for the study:

  1. Age 18 or older at the time of informed consent.
  2. Enrolled within 60 days following heart transplantation.
  3. Prospera™ testing is planned as part of standard clinical care to monitor for and assess transplant rejection.
  4. Prospera™ testing is planned to be performed within 60 days (inclusive) following heart transplantation.
  5. Selected by their healthcare provider to receive or continue receiving Prospera™ testing as part of their routine transplant management.
  6. Willing and able to provide written informed consent.
  7. Willing and able to comply with study procedures.

Patients are not eligible for the study if they meet any of the following criteria:

  1. Pregnant at the time of signing informed consent.
  2. Candidate for multiple solid organ or tissue transplant.
  3. History of prior organ or cellular transplantation.
  4. Ongoing testing with another allograft dd-cfDNA assessment is planned.

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

  • Observational Models: Case-Only
  • Time Perspectives: Prospective

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
Measure Description
Time Frame
Primary Endpoints:
Time Frame: 3 years

Primary molecular endpoint: percent of donor-derived cell-free DNA (dd-cfDNA) measured via the Prospera™ test.

Primary clinical endpoints:

  1. Biopsy-proven rejection (ISHLT Grade ACR >1R and ISHLT Grade AMR >0).
  2. Rejection with hemodynamic compromise (ejection fraction <40% or >20% decline from baseline or the need for inotropic agents in the absence of biopsy-proven rejection).
  3. Treated rejection (biopsy proven rejection or hemodynamic compromise rejection where immunosuppressive therapy was increased or augmented).
3 years

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
Secondary Endpoints
Time Frame: 3 years

The secondary endpoints are:

  1. The predictive performance of the Prospera™ test in detecting rejection or allograft dysfunction after heart transplant as measured by the sensitivity, specificity, negative predictive value, positive predictive value, and area under the curve (AUC) of the Prospera™ test
  2. Acute cellular rejection (ISHLT 2004 grade >1R)
  3. Antibody mediated rejection (ISHLT 2013 grade >0)
  4. Left ventricular ejection fraction (LVEF) measured by echocardiographic assessment
  5. Cardiac allograft vasculopathy (ISHLT grade >0)
  6. Cumulative mean fluorescence intensity (MFI) of donor specific antibodies
3 years

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.
Natera, Inc.

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Michael Olymbios, MD, Natera, Inc.

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.
October 1, 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.
October 31, 2026

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.
June 30, 2027

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).
January 11, 2022

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.
January 11, 2022

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.
January 25, 2022

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.
May 22, 2025

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.
May 19, 2025

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.
May 1, 2025

More Information

Terms related to this study

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.
  • 21-054-TRP

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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