Drugs / TRASTUZUMAB PAMIRTECAN
last change Aug 2026 re-read 9 days ago

TRASTUZUMAB PAMIRTECAN

also known as BNT323 · DB-1303 · DB-1303/BNT323
Developed for
breast cancer · breast carcinoma · endometrial cancer · HER2 positive breast carcinoma
Investigated by
BioNTech SE · DualityBio Inc. · BioNTech (Shanghai) Pharmaceuticals Co., Ltd.

Regulatory milestones approvals, filings & regulatory actions · 1 recorded

MilestoneJurisdictionBrandIndicationDateSentence it was read from
Filed China (NMPA) — Her2-receptor negative breast cancer 2026-04-09

“today announced that the Biologics License Application (BLA) for the investigational antibody-drug conjugate (“ADC”) trastuzumab pamirtecan (“T-Pam”, also known as DB-1303 or...” dualitybiologics.com ↗

Trials 5

PhaseRegistry idDatesIndicationSponsorStatusOutcome
Phase 1/22 trials
Phase 1/2 NCT06827236 Apr 2025 → Aug 2029 expected breast carcinoma BioNTech SE Recruiting No outcome recorded
Phase 1/2 NCT05150691 Jan 2022 → Apr 2026 overdue — DualityBio Inc. Recruiting No outcome recorded
Phase 33 trials · 1 met primary
Phase 3 NCT06340568 Jun 2025 → Mar 2028 expected endometrial cancer BioNTech SE Recruiting No outcome recorded
Phase 3 NCT06265428 Jan 2024 → Feb 2026 overdue HER2 positive breast carcinoma DualityBio Inc. Active not recruiting Met primary
Phase 3 NCT06018337 Jan 2024 → Aug 2026 overdue breast cancer DualityBio Inc. Active not recruiting No outcome recorded

News releases announcing trial results or a regulatory action · 6

DateIssuerRelease
2026-04-11 BioNTech SE Results BioNTech and DualityBio’s Antibody-Drug Conjugate Trastuzumab Pamirtecan Demonstrated Clinically Meaningful Efficacy in Patients with HER2-Expressing, Recurrent Endometrial Cancer biontech.com ↗
The data demonstrated clinically meaningful efficacy and a manageable safety profile for trastuzumab pamirtecan monotherapy across all HER2 immunohistochemistry (“IHC”) expression levels (IHC1+, IHC2+, IHC3+) ii .
2026-04-09 DualityBio Inc. Regulatory DualityBio Announces China NMPA Acceptance of Biologics License Application Seeking Approval for Trastuzumab Pamirtecan for the Treatment of Unresectable or Metastatic HER2-Positive Adult Breast Cancer dualitybiologics.com ↗
the Biologics License Application (BLA) for the investigational antibody-drug conjugate (“ADC”) trastuzumab pamirtecan (“T-Pam”, also known as DB-1303 or BNT323), has been accepted for review by the China National Medical Products Administration (NMPA).
2025-09-05 BioNTech SE Results BioNTech and DualityBio Announce Phase 3 Trial of ADC Candidate BNT323/DB-1303 Met Primary Endpoint of Progression Free Survival in HER2-Positive Metastatic or Unresectable Breast Cancer biontech.com ↗
met its primary endpoint of progression free survival at a pre-specified interim analysis.
2025-09-05 DualityBio Inc. Results DualityBio and BioNTech Announce Phase 3 Trial of ADC Candidate BNT323/DB-1303 Met Primary Endpoint of Progression Free Survival in HER2-Positive Metastatic or Unresectable Breast Cancer dualitybiologics.com ↗
DualityBio and BioNTech Announce Phase 3 Trial of ADC Candidate BNT323/DB-1303 Met Primary Endpoint of Progression Free Survival in HER2-Positive Metastatic or Unresectable Breast Cancer
2025-04-29 DualityBio Inc. Results DualityBio Presented Early Clinical and Preclinical Data for Novel ADC Therapy Candidates at AACR 2025 dualitybiologics.com ↗
The preclinical data indicate anti-tumor activity compared to each candidate alone in tumor models.
2023-12-21 BioNTech SE Regulatory BioNTech and DualityBio Receive FDA Breakthrough Therapy Designation for Antibody-Drug Conjugate Candidate BNT323/DB-1303 in Endometrial Cancer biontech.com ↗
BioNTech SE (Nasdaq: BNTX, “BioNTech”) and Duality Biologics (Suzhou) Co. Ltd. (“DualityBio”) today announced that the U.S. Food and Drug Administration (“FDA”) granted Breakthrough Therapy designation for BNT323/DB-1303 for the treatment of advanced endometrial cancer in patients who progressed on or after treatment with immune checkpoint inhibitors.

All press releases naming this drug 7 releases

DateIssuerRelease

Evidence & citations 5 cited values

Every value below carries the sentence it was read from. 6 sources stand behind the page.

FieldValueCited text
Known as TRASTUZUMAB PAMIRTECAN ChEMBL registry synonym — accepted as the source's own label CHEMBL6068309 ↗
Known as BNT323 “This study is designed to compare efficacy and safety of DB-1303/BNT323 versus T-DM1 in HER2-positive, unresectable and/or metastatic breast cancer patients previously treated...” NCT06265428 ↗
3

“receive a 8 mg/kg IV dose of DB-1303/BNT323 on Day 1 of each cycle Q3W” NCT06018337 ↗

NCT06340568 ↗

NCT06827236 ↗

Known as DB-1303 “BNT323 (also known as DB-1303) or chemotherapy” NCT06340568 ↗
2

NCT06018337 ↗

NCT06265428 ↗

Known as DB-1303/BNT323 ClinicalTrials.gov intervention name — accepted as the source's own label NCT05150691 ↗
Route Intravenous “Administered IV” NCT05150691 ↗