Trials / Active Not Recruiting

Active Not RecruitingNCT04457596

T-DM1 and Tucatinib Compared With T-DM1 Alone in Preventing Relapses in People With High Risk HER2-Positive Breast Cancer, the CompassHER2 RD Trial

The CompassHER2 Trials (Comprehensive Use of Pathologic Response Assessment to Optimize Therapy in HER2-Positive Breast Cancer) CompassHER2 Residual Disease (RD), a Double-Blinded, Phase III Randomized Trial of T-DM1 Compared With T-DM1 and Tucatinib

Status: Active Not Recruiting
Phase: Phase 3
Study type: Interventional
Enrollment: 1,056 (actual)

Sponsor: Alliance for Clinical Trials in Oncology · Academic / Other
Sex: All
Age: 18 Years
Healthy volunteers: Not accepted

Summary

This phase III trial studies how well trastuzumab emtansine (T-DM1) and tucatinib work in preventing breast cancer from coming back (relapsing) in patients with high risk, HER2 positive breast cancer. T-DM1 is a monoclonal antibody, called trastuzumab, linked to a chemotherapy drug, called DM1. Trastuzumab is a form of targeted therapy because it attaches to specific molecules (receptors) on the surface of cancer cells, known as HER2 receptors, and delivers DM1 to kill them. Tucatinib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Giving T-DM1 and tucatinib may work better in preventing breast cancer from relapsing in patients with HER2 positive breast cancer compared to T-DM1 alone.

Detailed description

PRIMARY OBJECTIVE: I. To determine if the invasive disease-free survival (iDFS) with T-DM1 and tucatinib is superior to the iDFS in the control arm (T-DM1 + placebo) when administered to high risk patients with HER2-positive breast cancer and residual disease after neoadjuvant HER2-directed therapy. SECONDARY OBJECTIVES: I. To evaluate whether treatment with tucatinib plus T-DM1 compared to treatment with T-DM1 alone (T-DM1 plus placebo) improves the following: Ia. Breast cancer free survival (BCFS). Ib. Distant recurrence-free survival (DRFS). Ic. Brain metastases-free survival (BMFS). Id. Overall survival (OS). II. To evaluate whether treatment with tucatinib plus T-DM1 compared to treatment with T-DM1 alone (T-DM1 plus placebo) reduces the incidence of brain metastases. OUTLINE: Patients are randomized to 1 of 2 arms. ARM I: Patients receive T-DM1 intravenously (IV) over 30-90 minutes on day 1 and placebo orally (PO) twice daily (BID) on days 1-21. Treatment repeats every 21 days for up to 14 cycles in the absence of disease progression or unacceptable toxicity. ARM II: Patients receive T-DM1 IV over 30-90 minutes on day 1 and tucatinib PO BID on days 1-21. Treatment repeats every 21 days for up to 14 cycles in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up at 30 days, then every 6 months for 10 years.

Conditions

Interventions

Type	Name	Description
BIOLOGICAL	Trastuzumab Emtansine	Given IV
DRUG	Placebo Administration	Given PO
DRUG	Tucatinib	Given PO
OTHER	Questionnaire Administration	Ancillary studies
OTHER	Quality-of-Life Assessment	Ancillary studies

Timeline

Start date: 2021-03-02
Primary completion: 2028-01-31
Completion: 2035-05-31
First posted: 2020-07-07
Last updated: 2025-10-29

Locations

1,176 sites across 3 countries: United States, Canada, Puerto Rico

Regulatory

FDA-regulated drug study

Source: ClinicalTrials.gov record NCT04457596. Inclusion in this directory is not an endorsement.