Secondary BRain Metastases Prevention After Isolated Intracranial Progression on Trastuzumab/Pertuzumab or T-DM1 in Patients With aDvanced Human Epidermal Growth Factor Receptor 2+ brEast Cancer With the Addition of Tucatinib (BRIDGET)

Patients with advanced HER2+ breast cancer on maintenance trastuzumab/pertuzumab or T-DM1 with 1st or 2nd intracranial disease event (brain metastases) and stable extracranial disease will be enrolled. They will receive local therapy with stereotactic radiosurgery ± surgical resection if indicated followed by enrollment. Patients will continue standard of care trastuzumab/pertuzumab or T-DM1 with the addition of tucatinib. Hormone receptor positive patients requiring endocrine therapy should continue. Study treatment will continue until disease progression or intolerable side effects. Patients on trial with extracranial disease progression with stable intracranial disease should continue tucatinib into next line of therapy.

Study Overview

• Status: Active, not recruiting
• Conditions: Advanced Breast Cancer; Brain Metastases; Human Epidermal Growth Factor 2 Positive Carcinoma of Breast
• Intervention / Treatment: Drug: Trastuzumab; Drug: Trastuzumab Emtansine (T-DM1); Drug: Pertuzumab; Drug: Tucatinib

Detailed Description

Patients with advanced HER2+ breast cancer on either (1) first-line trastuzumab/pertuzumab OR (2) second-line T-DM1 in the metastatic setting OR (3) adjuvant trastuzumab-based therapy or T-DM1 with isolated intracranial recurrence will be included. Patients with de novo metastatic disease and brain metastases or isolated intracranial recurrence can enter upon initiation of maintenance trastuzumab/pertuzumab after chemotherapy if deemed necessary by treating oncologist and meeting other inclusion criteria. Patients with 1st or 2nd intracranial disease event (brain metastases) and stable extracranial disease will be enrolled. Third intracranial progression would be considered if > 12 month interval between second and third intracranial progression. They will receive local therapy with stereotactic radiosurgery ± surgical resection followed by enrollment. Patients will continue standard of care treatment trastuzumab/pertuzumab or T-DM1 with the addition of tucatinib. Hormone receptor-positive patients requiring endocrine therapy should continue.

Study treatment will continue until intercranial disease progression or intolerable side effects. Patients with extracranial disease progression while on trial with stable intracranial disease should continue tucatinib into the next line of therapy as described in protocol. If a subject continues tucatinib into the next line therapy they are still considered on study treatment and will be monitored according to the protocol. Cycles will continue consecutively and not restart. Once the subject comes off tucatinib they are considered off study treatment and will enter the follow up period.

• Study Type: Interventional
• Enrollment (Estimated): 48
• Phase: Phase 2

Contacts and Locations

Study Locations

• United States
  • California
    • San Francisco, California, United States, 94158
      • University of California San Francisco
  • Massachusetts
    • Boston, Massachusetts, United States, 02215
      • Dana Farber Cancer Institute
  • Michigan
    • Ann Arbor, Michigan, United States, 48109
      • University of Michigan Health System
  • Missouri
    • St Louis, Missouri, United States, 63130
      • Washington University in St. Louis
  • North Carolina
    • Durham, North Carolina, United States, 27710
      • Duke University Medical Center
  • Ohio
    • Columbus, Ohio, United States, 43210
      • Ohio State University Comprehensive Cancer Center
  • Oregon
    • Portland, Oregon, United States, 97213
      • Providence Portland Medical Center
  • Texas
    • Houston, Texas, United States, 77030
      • Md Anderson Cancer Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

Subject must meet all of the following applicable inclusion criteria to participate in this study:

• Written informed consent and HIPAA authorization for release of personal health information prior to registration. NOTE: HIPAA authorization may be included in the informed consent or obtained separately.
• Age ≥ 18 years at the time of consent.
• Eastern Cooperative Oncology Group (ECOG) Performance Status of 0-2.
• Locally advanced/unresectable or metastatic breast cancer with presence of brain metastases (Stage IV).
• Histologically confirmed HER2+ breast carcinoma by ASCO-CAP guidelines, with HER2+ defined by in situ hybridization (ISH), immunohistochemistry (IHC), or fluorescence in situ hybridization (FISH) methodology on most recent biopsy (primary tissue).
• Currently receiving: (1) first-line trastuzumab/pertuzumab with or without endocrine therapy OR (2) second-line T-DM1 in the metastatic setting OR (3) adjuvant trastuzumab-based therapy or T-DM1 with isolated intracranial recurrence. Patients with de novo metastatic disease and brain metastases or isolated metastatic disease to the brain can enroll at time of initiation of trastuzumab/pertuzumab. Induction taxane therapy is not required and need to administer can be determined by the treating physician. Patients on trastuzumab alone are allowed if pertuzumab not tolerated.
• Systemic disease otherwise stable per RECIST 1.1 or no evidence of extracranial disease.

• Adequate hepatic and renal function and hematologic parameters:

  • Absolute neutrophil count (ANC) ≥ 1.0 × 109/L
  • Platelets ≥ 100 × 109/L
  • Hemoglobin ≥ 9 g/dL
  • Total serum bilirubin ≤ 1.5 times upper limit of normal (ULN)
  • Aspartate aminotransferase (AST/SGOT) and alanine aminotransferase (ALT/SGPT) ≤ 2.5 × ULN (or ≤ 5 × ULN if liver metastases are present)
  • Serum creatinine ≤ 1.5 x ULN or estimated creatinine clearance ≥ 50 mL/min as calculated using the Cockcroft-Gault (CG) equation
  • Left ventricular ejection fraction (LVEF) ≥ 50%.

• Central nervous system inclusion - Based on screening brain magnetic resonance imaging (MRI), patients must have ALL of the following:

  • Adequate local therapy to existing brain lesions ≥ 5mm including surgical resection and/or stereotactic radiosurgery
  • Limited to first or second intracranial progression. Third intracranial progression would be considered if > 12 month interval between second and third intracranial progression.
  • Time since stereotactic radiosurgery (SRS) is ≥ 7 days prior to first dose of study treatment.
  • Time since surgical resection is ≥ 14 days prior to first dose of study treatment.
  • Time since local therapy < 12 weeks. Patients with de novo metastastic breast cancer presenting with brain metastases may enter following cessation of chemotherapy if within 24 weeks of local therapy to the brain and brain metastases have remained stable based on brain MRI.
  • Prior radiation is required within 12 weeks of enrollment to at least 1 brain lesion. Other brain lesions under 5mm do not require treatment.

NOTE: Relevant records of any CNS treatment including radiation must be available to allow for classification of target and non-target lesions

• Females of childbearing potential must have a negative serum pregnancy test at screening. If a urine test is done and it is positive or cannot be confirmed as negative, a serum pregnancy test will be required. NOTE: Females are considered of child bearing potential unless they are surgically sterile (have undergone a hysterectomy, bilateral tubal ligation, or bilateral oophorectomy) or they are naturally postmenopausal for at least 12 consecutive months.
• Females of childbearing potential and males must be willing to abstain from heterosexual intercourse or to use contraception as outlined in the protocol.

Exclusion Criteria:

Subjects meeting any of the criteria below may not participate in the study:

• Previously been treated with: Lapatinib, neratinib, afatinib, tucatinib or other investigational HER2/epidermal growth factor receptor (EGFR) or HER2 tyrosine kinase inhibitor (TKI) at any time previously (patients treated with adjuvant neratinib allowed if relapse > 12 months after last dose).
• Clinically significant cardiopulmonary disease.

• Clinically significant acute infection requiring systemic antibacterial, antifungal, or antiviral therapy including:

  • tuberculosis (clinical evaluation that includes clinical history, physical examination, and radiographic findings, and TB testing in line with local practice),
  • hepatitis B (known positive HBV surface antigen (HBsAg) result),
  • hepatitis C, or
  • human immunodeficiency virus (positive HIV 1/2 antibodies)

NOTE: Patients with a past or resolved HBV infection (defined as the presence of hepatitis B core antibody [anti-HBc] and absence of HBsAg) are eligible. Patients positive for hepatitis C (HCV) antibody are eligible only if polymerase chain reaction is negative for HCV RNA. Subjects with HIV/AIDS with adequate antiviral therapy to control viral load would be allowed if they are stable and have been on treatment for ≥ 4 weeks prior to first dose of study drug(s). Subjects with viral hepatitis with controlled viral load would be allowed while on suppressive antiviral therapy. Testing not required.

• Unable for any reason to undergo MRI of the brain
• Use of a strong cytochrome P450 (CYP)2C8 inhibitor within 5 half-lives of the inhibitor, or a strong CYP3A4 or CYP2C8 inducer within 5 days prior to first dose of study treatment. See protocol.

• Central nervous system exclusion - Based on screening brain MRI, patients must not have any of the following:

  • Ongoing use of systemic corticosteroids for control of symptoms of brain metastases at a total daily dose of > 2 mg of dexamethasone (or equivalent)
  • Diffuse leptomeningeal disease or positive CSF cytology; however, discreet dural-based metastases are allowed
  • Poorly controlled seizures. Defined as seizures that continue to occur despite optimal anticonvulsant medications based on investigator discretion.
  • History of whole brain radiation therapy
  • Any untreated brain lesions ≥ 5 mm
• Active infection requiring intravenous systemic therapy.
• Pregnant or breastfeeding (NOTE: breast milk cannot be stored for future use while the mother is being treated on study).
• Patients with a prior or concurrent malignancy within last 3 years whose natural history or treatment has the potential to interfere with the safety or efficacy assessment of the investigational regimen, per treating physician discretion, are not eligible for this trial.
• Treatment with any investigational drug within 30 days prior to registration.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

Experimental: Experimental Group; Trastuzumab/pertuzumab + tucatinib or T-DM1 + tucatinib 300mg of tucatinib taken orally twice a day. Taken on Days 1-21 of a 21 Day cycle (3 Weeks). Trastuzumab/Biosimilar administered per current package insert based on site standard of care guidelines Pertuzumab or Biosimilar administered per current package insert based on site standard of care guidelines Trastuzumab Emtansine (T-DM1) administered per current package insert based on site standard of care guidelines

Drug: Trastuzumab; Administer per current package insert based on site standard of care guidelines; Other Names: Herceptin; Drug: Trastuzumab Emtansine (T-DM1); Administer per current package insert based on site standard of care guidelines; Drug: Pertuzumab; Administer per current package insert based on site standard of care guidelines; Other Names: Perjeta; Drug: Tucatinib; 300 mg orally twice daily (21 Day Cycle); Other Names: Tukysa

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Progression Free Survival (PFS)	Evaluate the ability of tucatinib in combination with trastuzumab/pertuzumab or TDM-1 to prolong intracranial progression free survival (PFS) in patients compared to historical controls. PFS is defined as the time from the day of study treatment initiation until evidence of intracranial disease progression per RANO-BM or death from any cause.	3 years

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Progression Free Survival by RECIST 1.1	Evaluate the progression free survival by RECIST 1.1 criteria. PFS is defined as time from the day of study treatment initiation until evidence of disease progression per RECIST v1.1 or death from any cause.	3 years
Progression Free Survival of Extracranial Disease	Evaluate PFS of extracranial disease. PFS is defined as time from the day of study treatment initiation until evidence of extracranial disease progression per RECIST v1.1 or death from any cause.	3 years
Distant Versus Local Intracranial Progression Free Survival	Evaluate distant versus local intracranial PFS.	3 years
Site of First Progression	Evaluate the site of first progression (CNS vs non-CNS). Site of first progression (CNS vs non-CNS) is defined by first site of progression on trial either within the central nervous system or extracranial disease as defined by investigator	3 years
Overall Survival (OS)	Evaluate OS. OS defined as day of study treatment initiation until death from any cause.	3 years
Assess Adverse Events	Evaluate the toxicity profile of agents in patients with brain metastases. Toxicity will be classified and graded according to the National Cancer Institute's Common Terminology Criteria for Adverse Events (CTCAE, version 5.0)	2 months

Collaborators and Investigators

• Sponsor: Carey Anders, M.D.
• Collaborators: Pfizer
• Investigators: Principal Investigator: Carey Anders, MD, Duke Cancer Institute

Study record dates

Study Major Dates

• Study Start (Actual): March 23, 2023
• Primary Completion (Estimated): April 1, 2026
• Study Completion (Estimated): July 1, 2026

Study Registration Dates

• First Submitted: April 5, 2022
• First Submitted That Met QC Criteria: April 5, 2022
• First Posted (Actual): April 12, 2022

Study Record Updates

• Last Update Posted (Actual): March 17, 2026
• Last Update Submitted That Met QC Criteria: March 14, 2026
• Last Verified: March 1, 2026

More Information

Terms related to this study

• Keywords: Trastuzumab; Pertuzumab; HER2+ breast cancer; Brain metastases; T-DM1
• Additional Relevant MeSH Terms: Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Neoplasms by Site; Neoplasms; Nervous System Neoplasms; Central Nervous System Neoplasms; Brain Neoplasms; Amino Acids, Peptides, and Proteins; Proteins; Organic Chemicals; Polycyclic Compounds; Antibodies, Monoclonal, Humanized; Antibodies, Monoclonal; Antibodies; Immunoglobulins; Immunoproteins; Blood Proteins; Serum Globulins; Globulins; Macrolides; Lactones; Lactams, Macrocyclic; Macrocyclic Compounds; Maytansine; Trastuzumab; Ado-Trastuzumab Emtansine; pertuzumab; tucatinib
• Other Study ID Numbers: Pro00109777

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: Yes
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No