RECRUITING

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

Conditions

Locally Advanced Breast Cancer Unresectable Breast Carcinoma Metastatic Breast Cancer Breast Cancer (BC)Human epidermal growth factor receptor 2 (HER2)IHC scores 0, 1+, 2+, and 3+Antibody drug conjugate (ADC)Programmed Death-1 (PD-1)Programmed Death Ligand-1 (PD-L1)Programmed Death-1 monoclonal antibodies Anti vascular endothelial growth factor-A (anti-VEGF-A)

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Study Overview

This clinical trial focuses on testing the efficacy of different digital interventions to promote re-engagement in cancer-related long-term follow-up care for adolescent and young adult (AYA) survivors of childhood cancer.

Description

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 in combination with BNT327 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).

Official Title

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

Quick Facts

Study Start:2025-04-23

Study Completion:2029-05

Study Type:Not specified

Phase:Not Applicable

Enrollment:Not specified

Status:RECRUITING

Study ID

NCT06827236

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Ages Eligible for Study:18 Years

Sexes Eligible for Study:ALL

Accepts Healthy Volunteers:No

Standard Ages:ADULT, OLDER_ADULT

Inclusion Criteria	Exclusion Criteria
Age 18 years or older Willing and able to provide informed consent Able to understand and follow study procedures Stable medical condition	* 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 events. * 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 randomization/enrollment. * 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 screening. * Had prior treatment with topoisomerase I inhibitors, including ADCs 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 previously been randomized to or received treatment in a previous study with BNT323, regardless of treatment assignment. * Participants who received prior treatment with a PD-L1/VEGF bispecific antibody. Note: Prior treatment with PD-1/VEGF bispecific antibodies, PD-1/PD-L1 inhibitors or anti-VEGF therapies are permitted. * 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 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.

Inclusion Criteria

Exclusion Criteria

Age 18 years or older
Willing and able to provide informed consent
Able to understand and follow study procedures
Stable medical condition

* 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 events.
* 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 randomization/enrollment.
* 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 screening.
* Had prior treatment with topoisomerase I inhibitors, including ADCs 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 previously been randomized to or received treatment in a previous study with BNT323, regardless of treatment assignment.
* Participants who received prior treatment with a PD-L1/VEGF bispecific antibody. Note: Prior treatment with PD-1/VEGF bispecific antibodies, PD-1/PD-L1 inhibitors or anti-VEGF therapies are permitted.
* 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 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.

Contacts and Locations

Study Contact

BioNTech clinical trials patient information

CONTACT

+49 6131 9084

patients@biontech.de

Principal Investigator

BioNTech Responsible Person

STUDY_DIRECTOR

BioNTech SE

Study Locations (Sites)

Hematology - Oncology Associates of the Treasure Coast

Port Saint Lucie, Florida, 34952

United States

Collaborators and Investigators

Sponsor: BioNTech SE

BioNTech Responsible Person, STUDY_DIRECTOR, BioNTech SE

Study Record Dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Registration Dates

Study Start Date2025-04-23

Study Completion Date2029-05

Study Record Updates

Study Start Date2025-04-23

Study Completion Date2029-05

Terms related to this study

Keywords Provided by Researchers

Breast Cancer (BC)
Human epidermal growth factor receptor 2 (HER2)
IHC scores 0, 1+, 2+, and 3+
Antibody drug conjugate (ADC)
Programmed Death-1 (PD-1)
Programmed Death Ligand-1 (PD-L1)
Programmed Death-1 monoclonal antibodies
Anti vascular endothelial growth factor-A (anti-VEGF-A)

Additional Relevant MeSH Terms

Locally Advanced Breast Cancer
Unresectable Breast Carcinoma
Metastatic Breast Cancer