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A Phase I/II, multi-site, open-label, two-part trial to evaluate the efficacy, safety, and pharmacokinetics of BNT323 in combination with BNT327 in participants with advanced breast cancer

Status
Not yet recruiting
Phases
Phase 1Phase 2
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-517979-20-00
Acronym
BNT323-03
Enrollment
95
Registered
2025-11-11
Start date
Unknown
Completion date
Unknown
Last updated
2025-11-17

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

Conditions

Advanced Breast Cancer Metastatic Breast Cancer

Brief summary

Part 1 - Occurrence of dose limiting toxicities (DLTs) during the DLT evaluation period (Cycle 1), by dose level., Occurrence of Treatment-emergent adverse events (TEAEs), Grade greater than or equal to 3 TEAEs, serious adverse events (SAEs), treatment-related TEAEs, treatment-related Grade greater than or equal to 3 TEAEs, and treatment-related SAEs. In Part 1 by dose level. In Part 2 by cohort and arm., Occurrence of dose interruption, reduction, and discontinuation due to TEAEs In Part 1 by dose level. In Part 2 by cohort and arm., Part 2 - Objective response rate (ORR) defined as the proportion of participants in whom a confirmed complete response (CR) or partial response (PR) is observed as best overall response, by cohort and arm.

Detailed description

Part 1 - ORR defined as the proportion of participants in whom a confirmed CR or PR is observed as best overall response, by dose level., Part 2 - Duration of response (DoR) defined as the time from first objective response to first occurrence of objective tumor progression or death from any cause, whichever occurs first, by cohort and arm., Part 2 - Disease control rate (DCR) defined as the proportion of participants with confirmed CR, PR, or stable disease as best overall response, by cohort and arm., Part 2 - Time to response (TTR) defined as the time from first dose of IMP to first objective response, by cohort and arm., Part 2 Cohort 1 only - Progression free survival (PFS) based on the investigator’s assessment defined as the time from first dose of IMP to the first objective tumor progression or death from any cause, whichever occurs first, by arm.

Interventions

DRUGBNT327
DRUGBNT323

Sponsors

BioNTech SE
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Part 1 - Occurrence of dose limiting toxicities (DLTs) during the DLT evaluation period (Cycle 1), by dose level., Occurrence of Treatment-emergent adverse events (TEAEs), Grade greater than or equal to 3 TEAEs, serious adverse events (SAEs), treatment-related TEAEs, treatment-related Grade greater than or equal to 3 TEAEs, and treatment-related SAEs. In Part 1 by dose level. In Part 2 by cohort and arm., Occurrence of dose interruption, reduction, and discontinuation due to TEAEs In Part 1 by dose level. In Part 2 by cohort and arm., Part 2 - Objective response rate (ORR) defined as the proportion of participants in whom a confirmed complete response (CR) or partial response (PR) is observed as best overall response, by cohort and arm.

Secondary

MeasureTime frame
Part 1 - ORR defined as the proportion of participants in whom a confirmed CR or PR is observed as best overall response, by dose level., Part 2 - Duration of response (DoR) defined as the time from first objective response to first occurrence of objective tumor progression or death from any cause, whichever occurs first, by cohort and arm., Part 2 - Disease control rate (DCR) defined as the proportion of participants with confirmed CR, PR, or stable disease as best overall response, by cohort and arm., Part 2 - Time to response (TTR) defined as the time from first dose of IMP to first objective response, by cohort and arm., Part 2 Cohort 1 only - Progression free survival (PFS) based on the investigator’s assessment defined as the time from first dose of IMP to the first objective tumor progression or death from any cause, whichever occurs first, by arm.

Countries

France, Italy, Spain

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026