Oncology Cardiology / Cardiovascular Respiratory / COPD / Asthma Infectious Disease Gastroenterology Diabetes / Metabolic Neurology Women's Health Rheumatology Mental Health / Psychiatry Dermatology Rare Diseases Men's Health
Clinical Trial ● Currently Recruiting Phase I NCT06827236

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 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…

📅 17 Apr 2026 ⏱ 2 min read
Currently Recruiting
This trial is actively seeking participants in the UK. Discuss eligibility with your patient before referring.
Status
Currently Recruiting
Phase
Phase I
NCT ID
NCT06827236
Sponsor
BioNTech SE
Start
2025-04-23
ClinicaliQ Trial Snapshot
  • 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 — Recruiting….
  • Treatment being tested: BNT323 combined with BNT327 (both investigational agents) to determine optimal dosing, safety profile, and clinical efficacy in advanced breast cancer across hormone receptor-positive and hormone receptor-negative subtypes.
  • Patient eligibility overview: Advanced breast cancer patients with HR+ or HR- status and HER2 expression; typical Phase I/II trials require adequate organ function, performance status, and prior treatment history requirements (specific details in full protocol).
Use This Page For
  • Quick orientation before opening the registry record.
  • Checking recruitment status, phase and sponsor at a glance.
  • Connecting this trial to nearby guidelines, Drug Science and education.
What This Trial Is Studying

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).

Eligibility Snapshot
  • Key Inclusion Criteria (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 (Part 1, Part 2 Cohorts 2 and 4) or the central laboratory (Part 2, Cohorts 1 and 3) from the most recently collected pre-randomization tumor sample. * 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. * 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/enrollment. Key

Use the source registry for the full inclusion and exclusion criteria before discussing referral or enrolment.

Full Trial Details
View this trial on the source registry
Eligibility criteria, protocol, and results when available
View Trial ↗
Share: Twitter/X LinkedIn
Related

Related Clinical Intelligence

Guidelines, Drug Science, safety briefs and education connected to this trial area.

Guideline
Trastuzumab deruxtecan for treating HER2-low metastatic or unresectable breast cancer after chemotherapy
Oncology · 07 Oct 2026
Trastuzumab deruxtecan is recommended by NICE as a treatment option for HER2-low metastatic or unresectable breast cancer, making it suitable for patients…
View guideline →
Guideline
Durvalumab with platinum-based chemotherapy, then with or without olaparib, for untreated advanced or recurrent endometrial cancer
Oncology · 09 Sep 2026
Durvalumab combined with platinum-based chemotherapy is the recommended first-line treatment for untreated advanced or recurrent endometrial cancer, with olaparib addition considered based…
View guideline →
Guideline
Trastuzumab deruxtecan for treating HER2-positive unresectable or metastatic breast cancer after 1 or more lines of anti-HER2 treatment
Oncology · 20 Oct 2026
Trastuzumab deruxtecan is recommended as an option for HER2-positive unresectable or metastatic breast cancer only after 1 or more prior lines of…
View guideline →
Guideline
Dostarlimab for previously treated advanced or recurrent endometrial cancer with high microsatellite instability or mismatch repair deficiency
Oncology · 26 Aug 2026
Test for MSI-H/dMMR before treatment: All patients with advanced or recurrent endometrial cancer should undergo microsatellite instability or mismatch repair deficiency testing…
View guideline →
Clinical Brief
Wellbeing support demand for cancer patients grows
Oncology · BBC Health · 25 Oct 2026
Key Takeaways for Clinical Practice Cancer patients are reporting increased demand for wellbeing support services, suggesting current provision may not meet patient…
View brief →
Clinical Brief
New hope for breast cancer patients as life-extending drug now on NHS in England
Oncology · BBC Health · 16 Sep 2026
Enhertu is now available on the NHS in England, extending median overall survival by approximately seven months in eligible breast cancer patients…
View brief →