Status:

RECRUITING

A Dose Randomization Study of Bulumtatug Fuvedotin in TNBC Patients Previously Treated With ADCs

Lead Sponsor:

Mabwell (Shanghai) Bioscience Co., Ltd.

Conditions:

Triple Negative Breast Cancer

Eligibility:

All Genders

18+ years

Phase:

PHASE1

Brief Summary

The goal of this clinical trial is to investigate if treatment with bulumtatug fuvedotin is effective in triple-negative breast cancer patients who have previously received treatment with an antibody-...

Eligibility Criteria

Inclusion

  • Inclusion Criteria
  • Patient has measurable disease by RECIST v1.1
  • Recurrent or metastatic triple-negative breast cancer patients as per current ASCO/CAP guidelines
  • Patient has received prior treatment with a taxane and an antibody-drug conjugate with a topoisomerase inhibitor payload.
  • Patient has received no more than 3 prior lines of cytotoxic therapy in the locally advanced or metastatic setting.
  • Provision of archival tumor tissue or fresh tumor biopsy.
  • Capable of giving informed consent
  • Male or female subjects aged ≥ 18 years.
  • Subjects must be willing to receive blood transfusions if medically indicated.
  • ECOG 0-1
  • Adequate hematologic and organ function
  • Life expectancy of at least 3 months as assessed by the investigator
  • Compliance with contraceptive requirement
  • Exclusion Criteria:
  • Have received any prior treatment with enfortumab vedotin, tisotumab vedotin or other MMAE based or nectin-4 targeted antibody-drug conjugates.
  • Unstable CNS metastasis requiring treatment in the last 28 days.
  • Acute infection requiring IV treatment in the last 14 days.
  • Grade ≥2 peripheral neuropathy.
  • Pregnant or breastfeeding women.
  • Life-threatening illness or uncontrolled medical conditions that could compromise the subject's safety or put the study outcomes at risk
  • Any systemic anticancer therapy in the last 28 days prior to first administration of study drug.
  • Active HCV, HBV or HIV infection unless well controlled with anti-viral therapy.
  • Active or chronic corneal disorder, keratitis, corneal ulcerations or Sjogren's syndrome.
  • Have any ongoing acute inflammatory skin disease or chronic skin disease not well controlled.
  • Have been diagnosed with another primary malignancy except for adequately treated non-melanoma skin cancer or cervical cancer in situ; definitively treated non-metastatic prostate cancer; or subjects with another primary malignancy who are definitively relapse-free with at least 3 years elapsed since the diagnosis of the other primary malignancy.
  • Have significant, uncontrolled or active cardiovascular disease
  • Have active or a history of pneumonitis or interstitial lung disease that requires corticosteroid treatment. Patients with radiation pneumonitis that does not require treatment is allowed.
  • Have uncontrolled diabetes.
  • Have received any strong CYP3A4 inhibitors within 14 days prior to the first dose of study drug.
  • Subjects known to be hypersensitive to bulumtatug fuvedotin or to any components of the formulation.
  • History of drug abuse including narcotic and psychiatric drugs within 12 months prior to screening.
  • Have received a live vaccine within 30 days of planned start of study therapy.

Exclusion

    Key Trial Info

    Start Date :

    August 11 2025

    Trial Type :

    INTERVENTIONAL

    Allocation :

    ESTIMATED

    End Date :

    May 1 2028

    Estimated Enrollment :

    52 Patients enrolled

    Trial Details

    Trial ID

    NCT06908928

    Start Date

    August 11 2025

    End Date

    May 1 2028

    Last Update

    September 23 2025

    Active Locations (5)

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    Page 1 of 2 (5 locations)

    1

    City of Hope

    Duarte, California, United States, 91010

    2

    UCSD Moores Cancer Center

    La Jolla, California, United States, 92093

    3

    UChicago Medicine Comprehensive Cancer Center

    Chicago, Illinois, United States, 60637

    4

    Memorial Sloan Kettering Cancer Center

    New York, New York, United States, 10021