New drug targets Gene-Mutated breast cancer in phase 2 trial
NCT ID NCT06840483
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This Phase 2 study tests a drug called zelenectide pevedotin in 66 people with advanced breast cancer that has a specific gene change (NECTIN4 amplification). The study includes two groups: one with hormone receptor-positive/HER2-negative cancer and one with triple-negative breast cancer. The main goal is to see if the drug shrinks tumors, while also checking for side effects.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- zelenectide pevedotin (BT8009)
- What this could lead to
- If successful, this could provide a new treatment option for people with advanced breast cancer that has a specific genetic marker (NECTIN4 amplification).
- What could go wrong
- This is an early Phase 2 study with only 66 participants, so results may not apply to everyone. The drug may cause side effects or not shrink tumors as hoped.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
-
About 66 people
The number the study aims to enrol. It can still change while the study runs.
- Started
-
Mar 2025
- Expected to finish
-
Dec 2028
An estimate. End dates often move.
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria * Archival or fresh tumor tissue comprised of TNBC or HR+/HER2-negative invasive breast cancer available for NECTIN4 gene amplification testing. * Confirmed NECTIN4 gene amplification by an analytically validated clinical trial assay (CTA). * Measurable disease as defined by RECIST v1.1. * Life expectancy ≥ 12 weeks. * Eastern Cooperative Oncology Group Performance Status (ECOG PS) of ≤ 1. 1. Cohort A Specific Inclusion Criteria: Histologically or cytologically confirmed HR+/HER2-negative endocrine resistant/refractory breast cancer according to ASCO-CAP guidelines and received at least 1 and up to 3 prior lines of non-endocrine-based therapy for advanced disease. 2. Cohort B Specific Inclusion Criteria: Histologically or cytologically confirmed TNBC, including ER-low positive breast cancers (1-10% of cells expressing hormonal receptors by IHC), according to ASCO-CAP guidelines and have received at least 1 and up to 3 prior lines of systemic therapy for advanced disease. Exclusion Criteria * Prior treatment with any antibody drug conjugate (ADC) containing an Monomethyl Auristatin E (MMAE) (vedotin) payload or other MMAE-based therapy. * Known hypersensitivity or allergy to any of the ingredients of any of the study interventions, or to MMAE. * Previously tested HER2-positive (IHC 3+ or ISH+) on prior pathology testing (per ASCO-CAP guidelines). * Active keratitis or corneal ulcerations. * Active or untreated central nervous system (CNS) metastases. * Uncontrolled diabetes or hypertension. * Uncontrolled pleural effusion, pericardial effusion, or ascites requiring recurrent drainage procedures (once monthly or more frequently). * Active interstitial lung disease or pneumonitis requiring ongoing treatment with steroids (\>10mg/day of prednisone or equivalent) or other immunosuppressive medications. * Requirement, while on study, for treatment with strong inhibitors or strong inducers of human cytochrome P450 3A (CYP3A) or inhibitors of P-glycoprotein (P-gp) including herbal- or food-based inhibitors. * Prior treatment with any systemic anticancer therapy within 28 days or 5 half-lives, whichever is shorter, prior to first dose of study treatment Note: Additional protocol defined Inclusion/Exclusion criteria apply
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Clinica Oncologica-Azienda Ospedaliero Universitaria delle Marche
Ancona, 60126, Italy
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Compass Oncology - Rose Quarter Cancer Center
Portland, Oregon, 97227, United States
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Dana-Farber Cancer Institute
Boston, Massachusetts, 02215, United States
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Duke Cancer Institute
Durham, North Carolina, 27710, United States
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Hospital Beata Maria Ana
Madrid, 28007, Spain
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Hospital Quironsalud Barcelona
Barcelona, 08023, Spain
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Hospital Universitario 12 de Octubre
Madrid, 28041, Spain
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Istituto Europeo di Oncologia
Milan, 20141, Italy
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Istituto Romagnolo per lo Studio dei Tumori "Dino Amadori" - IRCCS IRST
Meldola, Forli/Cesena, 47014, Italy
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Memorial Sloan Kettering Cancer Center - Main Campus
New York, New York, 10065, United States
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Oncopole Claudius Regaud
Toulouse, 31059, France
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Peter MacCallum Cancer Centre
Melbourne, Victoria, 3000, Australia
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Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins (SKCCC)
Baltimore, Maryland, 21287, United States
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Siteman Cancer Center
St Louis, Missouri, 63108, United States
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Texas Oncology San Antonio
San Antonio, Texas, 78240, United States
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The Royal Marsden NHS Foundation Trust
London, SW3 6JJ, United Kingdom
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UZ Leuven
Leuven, 3000, Belgium
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Virginia Cancer Specialists
Fairfax, Virginia, 22031, United States
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