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Study of Izalontamab Brengitecan(BMS-986507)versus Treatment of Physician's Choice in Patients with Previously Untreated,Locally Advanced, Recurrent Inoperable,or MetastaticTriple-negative Breast CancerIneligible for anti-PD(L)1-based Treatments

IZABRIGHT-Breast01: A Randomized, Open-label, Inferentially Seamless Phase 2/3 Study of Izalontamab Brengitecan (BMS-986507) versus Treatment of Physician's Choice in Patients with Previously Untreated, Locally Advanced, Recurrent Inoperable,or MetastaticTriple-negative Breast Cancer (TNBC)or ER-low, HER2-negative BCwho are Ineligiblefor Anti-PD1/PD-L1 Treatment

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2041250102
Enrollment
40
Registered
2025-09-22
Start date
2025-10-01
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Patients with TNBC or ER-low, HER2-negative BC who are Ineligible for Anti PD1/PD-L1 Treatment

Interventions

Phase2 Arm A1:2.0 mg/kg iza-bren D1D8Q3W Arm A2:2.5 mg/kg iza-bren D1D8Q3W Arm B:TPC Specified dose on specified days Phase3 Arm A:iza-bren RP3D Arm B:TPC Specified dose on specified days

Sponsors

Itakura Eijun
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: -Histologically or cytologically confirmed and documented locally-advanced, recurrent inoperable, or metastatic TNBC (ER < 1%, PgR < 1%, HER2 IHC 0, 1+, or 2+ with FISH negative for HER2 gene amplification) or ER-low, HER2-negative BC (ER and / or PgR 1% to 10%, HER2 IHC 0, 1+, or 2+ with FISH negative for HER2 gene amplification) per ASCO/CAP criteria, based on the most recently analyzed biopsy or other pathology specimen. -Patients with recurrent disease must have experienced disease relapse at least 6 months after finishing their last therapy with curative intent. -Patients with TNBC must be considered ineligible for 1L chemotherapy combination treatment with an anti-PD-1 or an anti-PD-L1 due to either one of the following criteria:. -Investigator-determined ineligibility based on PD-L1 negative disease determined and documented prior to trial screening as part of SoC. -Has experienced disease relapse between 6 to 12 months after the completion of (neo)adjuvant therapy with an anti-PD(L)1. -Has a severe auto-immune disease or other contraindication. -Patients with ER-low, HER2-negative BC must be ineligible, in the opinion of the Investigator, for endocrine therapy-based treatments. -No previous systemic therapy in the locally advanced, recurrent inoperable or metastatic setting (ie incurable setting). -Measurable disease by CT or MRI as per RECIST v1.1.

Exclusion criteria

Exclusion criteria: -Participants with history of severe heart disease -Participants with Grade >= 3 lung disease defined according to NCI-CTCAE v5.0, or a history of interstitial lung disease (ILD) or pneumonitis. -Prior history of clinically significant bleeding, intestinal obstruction, or perforation of the gastrointestinal tract within 3 months of randomization that has not recovered to Grade <=1.

Design outcomes

Primary

MeasureTime frame
PFS by RECIST v1.1 per BICR

Secondary

MeasureTime frame
OS,Investigator-assessed PFS, Per BICR and investigator-assessed:(OR byRECIST v1.1,DCR,DOR,TTR),TTST,PFS2

Countries

Argentina, Australia, Austria, Brazil, Canada, Chile, China, Colombia, France, Germany, Greece, India, Israel, Italy, Japan, Korea, Mexico, Poland, Portugal, Romania, South Africa, Spain, Sweden, Switzerland, UAE, United Kingdom, United States

Contacts

Public ContactEijun Itakura

Bristol-Myers Squibb

MG-JP-RCO-JRCT@bms.com+81-120-093-507

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026