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No longer recruiting (closed or complete)Last updated: 18 May 2026

A study of a new targeted therapy called Zelenectide Pevedotin in people with advanced breast cancerPhase 2 Study of Zelenectide Pevedotin in Participants With NECTIN4 Amplified Advanced Breast Cancer

Trial purpose

Medical clipboardCancer treatment

Tumor type

Breast Cancers Breast

Age

People18+

Clinical summary

Summary

This study aims to assess the efficacy and safety of Zelenectide Pevedotin (Targeted therapy) in participants with NECTIN4-amplified recurrent, unresectable, or metastatic breast cancer who have received prior therapy.

The study will comprise of 2 cohorts. Cohort A will include participants with hormone receptor positive/ human epidermal growth factor receptor 2 negative [HR+/HER2-] breast cancer, whereas Cohort B will include participants with triple-negative breast cancer (TNBC). Both cohorts will recieve zelenectide pevedotin on Days 1, and 8 of every 21-day cycle. 

Conditions

This trial is treating people with NECTIN4-amplified recurrent, unresectable, or metastatic breast cancer who have received prior therapy.

Eligibility

Inclusion

  • 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

  • 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

Inclusion

  • You have had treatment, but your cancer has come back (relapsed or recurrent).
  • Your cancer has spread to other parts of the body (metastatic) or has grown into nearby parts of the body (locally advanced).
  • Your cancer has not spread to other parts of the body, but it is not possible to perform surgery to remove it (unresectable).
  • You have had treatment but your cancer has gotten worse or has not responded to the treatment you have been given.

Exclusion

  • You have certain types of non-cancer medical conditions.
  • You have had certain treatments, surgical procedures or drugs.
Message

Clinical trials have complex eligibility criteria, and other criteria may apply for this trial. Ask your doctor about whether this trial could be right for you.

Participating hospitals

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More information

Trial Identifiers

Information on this page is partially produced from ClinicalTrials.gov *. View further details about this trial on the registry via the links below:

  • NCT06840483 *
  • BT8009-201 (DURAVELO-3); 2024-517868-33-00

Trial sponsor

BicycleTx Limited

Scientific Title

Phase 2 Study of Zelenectide Pevedotin in Participants With NECTIN4 Amplified Advanced Breast Cancer

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