Cardiotoxicity in Breast Cancer Patients Treated With Proton or Photon Radiotherapy: A RadComp Companion Study

February 5, 2026 updated by: Abramson Cancer Center at Penn Medicine
This is a companion study to the "Pragmatic Randomized Trial of Proton vs Photon Therapy for Patients with non-Metastatic Breast Cancer Receiving Comprehensive Nodal Radiation: A Radiotherapy Comparative Effectiveness (RadComp) Consortium Trial" (NCT02603341). The investigators will collect cardiovascular (CV) biomarkers and echocardiograms prior to, during, and for up to 1 year following radiation for a subset of patients enrolled on RadComp and to evaluate the impact of proton vs photon radiation therapy (RT) on CV function and structure.

Study Overview

Status

Status

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

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.

Detailed Description

The study population of the companion study will consist of newly enrolled RadComp trial participants. Patients on this ancillary will be consented prior to RadComp randomization to decrease the bias secondary to RT type and enhance internal validity. The study will define the early changes in biomarkers, imaging measures, and RT dose volume metrics and long-term (5-10 year) CV clinical outcomes using the RadComp parent study's infrastructure for clinical data collection and long-term follow-up. Blood samples, echocardiograms, and questionnaires are obtained at baseline (between end of chemotherapy and start of RT), immediately after the end of RT, and at 6 months and 12 months after the end of RT. An additional blood sample will be collected at 4 weeks after the start of RT. Clinical, demographic, and patient reported outcomes data are collected as part of the RadComp parent study. In addition to data collected by RadComp, we will collect a limited set of clinical data and two additional quality of life instruments for the companion 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.
172

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

  • United States
    • Alabama
      • Birmingham, Alabama, United States, 35233
        • University of Alabama
    • Illinois
      • Warrenville, Illinois, United States, 60555
        • Northwestern Medicine
    • Maryland
      • Baltimore, Maryland, United States, 21287
        • Johns Hopkins
    • New York
      • New York, New York, United States, 10065
        • Memorial Sloan Kettering Cancer Center
    • Pennsylvania
      • Philadelphia, Pennsylvania, United States, 19104
        • Abramson Cancer Center at University of Pennsylvania
    • Washington
      • Seattle, Washington, United States, 98195
        • University of Washington

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

21 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Patients eligible for and enrolling on the RadComp trial at participating RadComp sites will be approached for the companion cohort.

Description

Inclusion Criteria:

  • Consented to RadComp
  • Willing and able to provide written consent

Exclusion Criteria:

  • Knowledge of randomization on RadComp prior to enrollment on companion study
  • Non-diagnostic echocardiography windows as assessed on local read.

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

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
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.
Ancillary Cohort
No Intervention: Subjects will be followed before, during and for up to 1 year after radiation with echocardiogram, blood draw, and symptoms and activity survey.
Radiation: Proton vs Photon Radiation
Assignment to proton vs photon by randomization on RadComp parent study.

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
Left ventricular ejection fraction (LVEF)
Time Frame: 14 months
Change in echocardiography derived LVEF from baseline
14 months
Right Ventricular (RV) Fractional Area Change (FAC)
Time Frame: 14 months
Change in echocardiography derived RV FAC from baseline
14 months
Circulating N-terminal pro B-type natriuretic peptide (NTproBNP)
Time Frame: 14 months
Change in NTproBNP levels from baseline
14 months
Circulating Placental Growth Factor (PIGF)
Time Frame: 14 months
Change in PIGF levels from baseline
14 months
Circulating Growth Differentiation Factor-15 (GDF-15)
Time Frame: 14 months
Change in GDF-15 levels from baseline
14 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
LV systolic strain
Time Frame: 14 months
Change in 2D echocardiography derived LV global longitudinal strain and circumferential strain from baseline
14 months
Echocardiography derived Ventricular Arterial Coupling Measurement
Time Frame: 14 months
Change from baseline in ventricular arterial coupling as defined by end systolic elastance divided by effective arterial elastance
14 months
Diastolic function (E/e')
Time Frame: 14 months
Change in E/e' from baseline as measured by echocardiogram
14 months
Circulating Troponin T(TnT)
Time Frame: 14 months
Change in high-sensitivity TnT levels from baseline
14 months
Circulating high-sensitivity C-Reactive Protein (hsCRP)
Time Frame: 14 months
Change in hsCRP levels from baseline
14 months

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
3D LVEF
Time Frame: 14 months
Change in 3d echocardiography derived LVEF from baseline
14 months
3D LV systolic strain
Time Frame: 14 months
Change in 3D echocardiography derived longitudinal and circumferential strain from baseline
14 months
LV Twist and Torsion
Time Frame: 14 months
Change in 3D echocardiography derived measures of LV twist and torsion from baseline
14 months
Patient Reported Outcomes (PRO) Common Terms and Criteria for Adverse Events (CTCAE)
Time Frame: 14 months
Incidence and severity of PRO CTCAEs
14 months
Incidence of major cardiovascular events (MCE)
Time Frame: 10 years
Collected, defined, and adjudicated by the RadComp study team
10 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.
Abramson Cancer Center at Penn Medicine

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
National Heart, Lung, and Blood Institute (NHLBI)

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: Bonnie Ky, MD, MSCE, University of Pennsylvania

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.
August 1, 2020

Primary Completion (Actual)

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.
May 29, 2025

Study Completion (Actual)

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.
May 29, 2025

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).
April 6, 2020

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.
April 23, 2020

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.
April 24, 2020

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.
February 9, 2026

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.
February 5, 2026

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.
July 1, 2025

More Information

Terms related to this study

Keywords

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.
  • UPCC 17119

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

IPD Plan Description

Participants may opt in to allowing data and/or banked samples to be used for future research and shared with other researchers. A detailed plan for sharing IPD will be finalized at a later date, and may depend in part on how many participants elect this option. Additional supporting information may be shared, including the study protocol and informed consent form.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

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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