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Losartan in Prevention of Radiation-Induced Heart Failure

The Role of Losartan in the Prevention of Early Structural Changes Associated With Radiation-Induced Heart Failure

Status
Completed
Phases
Early Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05607017
Enrollment
5
Registered
2022-11-07
Start date
2023-09-13
Completion date
2025-10-07
Last updated
2026-04-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Breast Cancer, Myocardial Fibrosis, Radiation-Induced Fibrosis

Keywords

Breast Cancer, Myocardial Fibrosis, Radiation-Induced Fibrosis

Brief summary

This study is being done to see if losartan affects the chances of developing radiation-induced heart failure in patients who are receiving radiation therapy as part of standard of care treatment for breast cancer. The interventions involved in this study are: * Losartan * Radiation Therapy (standard of care)

Detailed description

This is a pilot study examining whether losartan prevents radiation therapy-induced myocardial fibrosis (thickening of the heart tissue), which can cause heart failure, in breast cancer patients receiving radiation therapy. Losartan is an U.S. Food and Drug Administration (FDA) approved drug used to treat hypertension (high blood pressure) and heart failure. The U.S. Food and Drug Administration (FDA) has not approved losartan for use in the treatment of breast cancer. The FDA has approved radiation therapy as a treatment option for breast cancer. The research study procedures include: screening for eligibility and study treatment including evaluations and follow up visits. It is expected participants will be on the study for 1 year. It is expected that about 10 people will take part in this research study.

Interventions

DRUGLosartan

Taken Orally

RADIATIONRadiation Therapy

Photon Radiation Therapy

Sponsors

Massachusetts General Hospital
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

-\>18 years of age * Non-metastatic Breast Cancer patients who are scheduled to receive conventional left breast/chest wall RT inclusive of treatment to the internal mammary lymph nodes (IMNs) * Prior chemotherapy is permitted * Patients must have Left-sided Breast Cancer * Ability to understand and the willingness to sign a written informed consent document * No contraindication to MRI

Exclusion criteria

* Person who is pregnant or breastfeeding. * Patient unable to swallow oral medication. * Patients receiving any other investigational agent will not be excluded from study eligibility, unless the patient is already enrolled in an interventional study evaluating cardiac toxicity * Patients already receiving ACE/ARBs. * Patients with a history of allergic reactions to Losartan biosimilars.

Design outcomes

Primary

MeasureTime frameDescription
Extracellular Volume (ECV) of Myocardial Fibrosis6 monthsThe primary endpoint is detectable decrease in extracellular volume as measured by cardiac MRI

Secondary

MeasureTime frameDescription
Serum cardiac biomarker6 monthsThe secondary objective of this study is to compare pre- and post-Radiation Therapy changes in serum TGF-β levels

Countries

United States

Contacts

PRINCIPAL_INVESTIGATORRachel Jimenez, MD

Massachusetts General Hospital

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Apr 7, 2026