Prognostic and Predictive Role of Intrinsic Molecular Subtypes in BRCA-associated Breast Cancer (PAMBRACA)

May 28, 2026 updated by: Angela Toss

This study is an observational study being carried out in several hospitals. No extra tests or procedures are required beyond those already part of normal medical care.

The study is sponsored by the University of Modena and Reggio Emilia and aims to include about 100 patients.

The main goal of the study is to better understand the different biological types of breast cancer in patients who have hormone receptor-positive (HR-positive), HER2-negative breast cancer related to BRCA gene mutations. In particular, the study will explore whether these cancers tend to belong to molecular types that may respond less to endocrine or CDK4/6 inhibitor therapy.

The study also compares cancers linked to BRCA1 and BRCA2 mutations and investigates whether the different biological types are associated with differences in disease outcomes and response to treatment.

Study Overview

Status

Recruiting

Conditions

Study Type

Observational

Enrollment (Estimated)

100

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
      • Genova, Italy, 16132
        • Recruiting
        • Ospedale San Martino di Genova
        • Contact:
      • Milan, Italy, 20133
      • Milan, Italy, 20141
        • Recruiting
        • Istituto Oncologico Europeo di Milano
        • Contact:
      • Modena, Italy, 41124
        • Recruiting
        • Azienda Ospedaliero-Universitaria Policlinico di Modena
        • Contact:
      • Padova, Italy, 35128
        • Recruiting
        • Istituto Oncologico Veneto IRCCS Padova
        • Contact:
      • Roma, Italy, 00168

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

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Each enrolling center will be responsible for identifying patients eligible for the study. Information will be collected for each patient regarding:

  • Patient and treatment characteristics: age, date of diagnosis, and data relating to any treatments received.
  • Biological characteristics of the primary disease: histotype, grade, hormone receptor and HER2 expression, and cytoproliferative activity.

The data collected reflect those normally collected in clinical practice for patients diagnosed with breast cancer. No additional specific visits or assessments are required.

Description

Inclusion Criteria:

  • Age 18 years or older
  • Patients carrying a pathogenic or likely pathogenic germline variant in BRCA1 or BRCA2 with a histologically confirmed diagnosis of HR+/HER2-negative breast cancer
  • Patients with available hospital and/or outpatient medical records for clinical data collection
  • Presence of available formally fixed paraffin-embedded (FFPE) breast tumor tissue (primary or metastatic site)

Exclusion Criteria:

  • None

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

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Distribution of intrinsic subtypes in BRCA1 and BRCA2-associated HR+/HER2-negative tumors
Time Frame: through study completion
To evaluate the differences in intrinsic subtype distribution between BRCA1 and BRCA2-associated HR+/HER2-negative tumors.
through study completion
Overall survival depending on intrinsic subtype
Time Frame: through study completion
To explore the prognostic role of different intrinsic subtypes in terms of overall survival (OS) in HR+/HER2-negative BRCA-associated breast cancer
through study completion

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Benefit from CDK4/6 inhibitors depending on molecular subtype
Time Frame: through study completion
Evaluating sensitivity to CDK4/6 inhibitors and PARP inhibitors by molecular subtype in HR+/HER2-negative BRCA-related tumors.
through study completion
Molecular features of BRCA1-related and BRCA2-related breast cancers
Time Frame: through study completion
To evaluate, through a multigene panel, the different molecular expression of HR+/HER2-negative BRCA1-related and BRCA2-related breast cancers.
through study completion

Collaborators and Investigators

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

Sponsor

Angela Toss

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)

September 5, 2024

Primary Completion (Estimated)

December 1, 2026

Study Completion (Estimated)

December 1, 2026

Study Registration Dates

First Submitted

April 21, 2026

First Submitted That Met QC Criteria

May 28, 2026

First Posted (Actual)

June 1, 2026

Study Record Updates

Last Update Posted (Actual)

June 1, 2026

Last Update Submitted That Met QC Criteria

May 28, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • PAMBRACA

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

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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