Home/Loved One/NCT06827236
PHASE1RECRUITING
View on ClinicalTrials.gov

Comparing 8 approaches for locally advanced breast cancer

Official title: A Clinical Study to Find the Optimal Dose of an Investigational Treatment Called BNT323 When Used in Combination With Another Investigational Treatment, BNT327, and to Test if That Combination Treatment is Safe and Beneficial for Patients With Advanced Breast Cancer

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

Condition: Locally Advanced Breast CancerSponsor: BioNTech SETarget enrollment: 380

Interventions

DRUG

BNT323

Intravenous infusion

DRUG

BNT327

Intravenous infusion

Canadian Sites (3)

CIUSSS du Saguenay-Lac-Saint-Jean

Chicoutimi, Canada

RECRUITING

Sunnybrook Health Sciences Centre

Toronto, Canada

RECRUITING

BC Cancer - Vancouver

Vancouver, Canada

RECRUITING

Eligibility Criteria

See who this study is looking for18 criteria

The trial’s own eligibility text, word for word from the registry. Only the trial site can say who takes part.

Inclusion

  • +Has a documented history of HER2 expression consistent with the subgroup definitions (i.e., HER2-low, HER2-ultralow, HER2-null, HER2-positive, or TNBC) as per current American Society of Clinical Oncology/College of American Pathologists guidelines.
  • +(applicable to all participants and all parts unless otherwise specified):
  • +Have pathologically documented BC that:
  • +Is locally advanced, unresectable or metastatic.
  • +Has a confirmed HER2 status as determined by the local laboratory as standard of careStandard of careThe treatment normally given for a condition outside a study.Read more → testing prior to study screeningScreeningThe checks done before joining, to see whether a study fits.Read more → (Part 1, Part 2 CohortsCohortA group of participants sharing a characteristic, followed together.Read more → 2 and 4) or the central laboratory (Part 2, Cohorts 1 and 3) from the most recently collected pre-randomizationRandomisedWhich group you go into is decided by chance, not by you or your doctor.Read more → tumor sample.
  • +Have measurable disease defined by RECIST v1.1.
  • +Has left ventricular ejection fraction ≥55% by either echocardiography or multi-gated acquisition (scanning) within 28 days before randomization/enrollmentEnrolmentThe number of participants a study plans to include, or has included.Read more →.

Exclusion

  • Have received other systemic immunostimulatory agents or immunosuppressive therapies (such as interferon-α, interleukin-2, or methotrexate) within 4 weeks prior to the initiation of study treatment or are within five half-lives of the treatment drug (whichever is longer). Exception: excluding local, intranasal, intraocular, intra-articular or inhaled corticosteroids, short term use (≤7 days) of corticosteroids for prophylaxis (e.g., prevention of contrast agent allergy) or treatment of non-autoimmune conditions (e.g., delayed hypersensitivity reactions caused by exposure to allergens).
  • Have history of small bowel obstruction requiring hospitalization within the past 3 months prior to the first dose of IMP.
  • Have an uncontrolled intercurrent illness that would limit compliance with study requirement or substantially increase risk of incurring adverse eventsAdverse eventAny medical problem that happens during a study, whether or not the treatment caused it.Read more →.
  • Have clinically uncontrolled pleural effusion, ascites or pericardial effusion requiring drainage, peritoneal shunt, or cell-free concentrated ascites reinfusion therapy within 2 weeks prior to randomizationRandomisedWhich group you go into is decided by chance, not by you or your doctor.Read more →/enrollmentEnrolmentThe number of participants a study plans to include, or has included.Read more →.
  • Have a history of (non-infectious) interstitial lung disease (ILD)/pneumonitis that required steroids, have current ILD/pneumonitis, or where suspected ILD/pneumonitis cannot be ruled out by imaging at screeningScreeningThe checks done before joining, to see whether a study fits.Read more →.
  • Had prior treatment with topoisomerase I inhibitors, including antibody-drug conjugates with topoisomerase I inhibitor payloads such as trastuzumab deruxtecan.
  • Have received any of the following therapies or drugs prior to the initiation of the study:
  • Participants who have received prior treatment with BNT323.
  • Participants who received prior treatment with a programmed death-ligand 1 (PD-L1) / vascular endothelial growth factor (VEGF) bispecific antibody. Note: Prior treatment with programmed death 1 (PD-1)/VEGF bispecific antibodies, PD-1/PD-L1 inhibitors or anti-VEGF therapies are permitted.
  • Have received systemic corticosteroids (at a dosage greater than 10 mg/day of prednisone or an equivalent dose of other corticosteroids) within 3 weeks prior to the initiation of study treatment.
  • NOTE: Other protocolProtocolThe detailed plan a study must follow.Read more → defined InclusionInclusion criteriaThe things you must have or be for a study to consider you.Read more →/Exclusion criteriaExclusion criteriaThe things that would prevent someone from taking part.Read more → apply.
5 concepts to explore on this page · up to 1,300 pointsTap any term to learn what it means.

In plain language

Assembled directly from this trial’s registry record. Every sentence traces to a field below — nothing here is generated or interpreted.

Learning 
What this study is

This study is testing a treatment for a condition.

Phase 1Phase 1The earliest stage of human testing, in a small group, focused on safety.Read more →/2 — a combined study that starts with early safety and continues into what the treatment does.

What is being given or done in this study: BNT323, BNT327.

From the trial registry

Built from these fields:

  • designModule.designInfo.primaryPurpose
  • designModule.phases
  • armsInterventionsModule.interventions[].name
How the study is run

Which group you would be placed in is decided by chance, like a coin flip — not by you and not by your doctor.

This study is open-labelOpen-labelEveryone knows which treatment is being given — nothing is hidden.Read more →: everyone knows which treatment is being given, including you and the study team.

From the trial registry

Built from these fields:

  • designModule.designInfo.allocation
  • designModule.designInfo.maskingInfo.masking
Is there a placebo?

This study does not list a placeboPlaceboA dummy treatment with no active medicine, used for comparison.Read more → group.

There are 8 groups in this study.

From the trial registry

Built from this field:

  • armsInterventionsModule.armGroups[].type
Who the study is looking for

The study lists a minimum age of 18 years, with no upper limit given.

The study is open to people of any sex.

The study does not accept healthy volunteersHealthy volunteerSomeone without the condition being studied who takes part anyway.Read more →.

These are the criteria the study lists. Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can decide whether someone can take part.

From the trial registry

Built from these fields:

  • eligibilityModule.minimumAge
  • eligibilityModule.sex
  • eligibilityModule.healthyVolunteers
How big and how long

The study aims to enrol about 380 people.

The study is currently expected to finish around August 2029.

The main measurement is taken over: During the DLT evaluation period (Cycle 1), i.e., the time of initiation of the first dose of investigational medicinal product (IMP) up to 21 days.

From the trial registry

Built from these fields:

  • designModule.enrollmentInfo.count
  • statusModule.completionDateStruct.date
  • outcomesModule.primaryOutcomes[].timeFrame
What the study measures

Part 1 - Occurrence of dose limiting toxicities (DLTs) — measured over During the DLT evaluation period (Cycle 1), i.e., the time of initiation of the first dose of investigational medicinal product (IMP) up to 21 days.

Occurrence of Treatment-emergent adverse eventsAdverse eventAny medical problem that happens during a study, whether or not the treatment caused it.Read more → (TEAEs), Grade ≥3 TEAEs, serious adverse eventsSerious adverse eventAn adverse event meeting a formal severity threshold, such as requiring hospital admission.Read more → (SAEs), treatment-related TEAEs, treatment-related Grade ≥3 TEAEs, and treatment-related SAEs — measured over From the time of initiation of the first dose of IMP to 90 days after the last IMP dose.

Occurrence of dose interruption, reduction, and discontinuation due to TEAEs — measured over From the time of initiation of the first dose of IMP to 90 days after the last IMP dose.

Part 2 - Objective response rate (ORR) — measured over From the time of initiation of the first dose of IMP to last tumor assessment scan, i.e., up to 36 months.

From the trial registry

Built from these fields:

  • outcomesModule.primaryOutcomes[].measure
  • outcomesModule.primaryOutcomes[].timeFrame

Source: NCT06827236 on ClinicalTrials.gov. The full registry text is further down this page — this summary never replaces it.

Not medical advice. What do these terms mean?

What is being tested — in plain terms

About BNT323Drug

Intravenous infusion

From the trial registry — its own words, unedited.

What a drug is here: A medicine — a chemical or small-molecule treatment — given as the thing being studied.

Read the full explanation → · in clinical review

About BNT327Drug

Intravenous infusion

From the trial registry — its own words, unedited.

What a drug is here: A medicine — a chemical or small-molecule treatment — given as the thing being studied.

Read the full explanation → · in clinical review

Common questions

Answered from this trial’s registry record. Where the record doesn’t say, these answers say so rather than filling the gap.

Am I eligible for this trial?

Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can decide whether someone can take part. Concord cannot make that determination, and neither can any tool that has not examined you.

What the study lists: a minimum age of 18 years.

The full inclusionInclusion criteriaThe things you must have or be for a study to consider you.Read more → and exclusion criteriaExclusion criteriaThe things that would prevent someone from taking part.Read more → are published on this page, exactly as the study team wrote them.

The useful next step is to bring this trial to your doctor. Answering a few questions first gives them something concrete to review.

From the trial registry
  • eligibilityModule.minimumAge
  • eligibilityModule.eligibilityCriteria
Is there a placebo?

This study does not list a placeboPlaceboA dummy treatment with no active medicine, used for comparison.Read more → group.

From the trial registry
  • armsInterventionsModule.armGroups[].type
Would I know which treatment I am getting?

This study is open-labelOpen-labelEveryone knows which treatment is being given — nothing is hidden.Read more →: everyone knows which treatment is being given, including you and the study team.

Which group you would be placed in is decided by chance, like a coin flip — not by you and not by your doctor.

From the trial registry
  • designModule.designInfo.maskingInfo.masking
  • designModule.designInfo.allocation
Who can join?

The study lists a minimum age of 18 years, with no upper limit given.

It is open to people of any sex.

It does not accept healthy volunteersHealthy volunteerSomeone without the condition being studied who takes part anyway.Read more →.

Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can confirm whether a particular person can take part.

From the trial registry
  • eligibilityModule.minimumAge
  • eligibilityModule.sex
  • eligibilityModule.healthyVolunteers
How long would this take?

The study's main measurement is taken over: During the DLT evaluation period (Cycle 1), i.e., the time of initiation of the first dose of investigational medicinal product (IMP) up to 21 days.

The study as a whole is currently expected to finish around 2029-08.

How long any one person takes part can differ from the study length. The study team can tell you what the schedule looks like in practice.

From the trial registry
  • outcomesModule.primaryOutcomes[].timeFrame
  • statusModule.completionDateStruct.date
How many people are taking part?

The study aims to enrol about 380 people.

From the trial registry
  • designModule.enrollmentInfo.count
Where is this happening?

This study lists 9 locations, including: Chicoutimi, Canada; Toronto, Canada; Vancouver, Canada; Detroit, Michigan, United States; Grand Rapids, Michigan, United States; Harrison, New York, United States, and 3 more.

Sites can open and close during a study, so confirm with the team before travelling.

From the trial registry
  • trial_locations

About This Trial

This is a Phase I/II, multi-site, open-label, two-part study designed to evaluate the efficacy, safety, optimized dose and contribution of components of BNT323 (also known as trastuzumab pamirtecan and DB-1303) in combination with BNT327 (also known as pumitamig and PM8002) in participants with hormone receptor-positive (HR+) or hormone receptor-negative (HR-), Human epidermal growth factor receptor (HER)2-positive, HER2-low (immunohistochemistry \[IHC\] 1+ or IHC 2+/in situ hybridization -), HER2-ultralow (IHC 0, with membrane staining) or HER2-null breast cancer (BC), or triple-negative breast cancer (TNBC).

Other Sites (11)

Karmanos Cancer Institute

Detroit, Michigan, United States

Brigitte Harris Cancer Pavilion BHCP

Detroit, Michigan, United States

START Midwest, LLC

Grand Rapids, Michigan, United States

Memorial Sloan Kettering Cancer Center Westchester

Harrison, New York, United States

Beth Israel Comprehensive Cancer Center

New York, New York, United States

Mount Sinai Medical Center

New York, New York, United States

Icahn School of Medicine at Mount Sinai PRIME

New York, New York, United States

Memorial Sloan Kettering Hospital

New York, New York, United States

Memorial Sloan Kettering Commack

New York, New York, United States

Stony Brook University Hospital

Stony Brook, New York, United States

Memorial Sloan Kettering Cancer Center Nassau

Uniondale, New York, United States

Worth passing on?

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Review the Care Package

This page is for informational purposes only and does not constitute medical advice. Clinical trial eligibility can only be determined by the trial site after proper screening. Trial information is sourced from ClinicalTrials.gov and may not reflect the most current status. Always consult your healthcare provider before making decisions about clinical trial participation.