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Pertuzumab

Phase 3

Advanced Breast Cancer | Small molecule | Oncology |AstraZeneca PLC|Last Updated: Aug 11, 2026

Target and mechanism

Molecular targetERBB2
Target classInhibitor
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDBiomarker
Total Trials1
Total Enrollment200

FDA Designations

No designations recorded

Clinical trial landscape

Pertuzumab · 2 trials · 7 indications

Phase 3 2
NCT07683754T-DXd Based Therapy Followed by Endocrine Therapy Plus Dual HER2 Blockade in First-line HER2+/ HR+ Metastatic Breast Cancer and Retreatment With T-DXdAdvanced Breast Cancer
NOT YET_RECRUITING200 Analytics
NCT05113251Trastuzumab Deruxtecan (T-DXd) Alone or in Sequence With THP, Versus Standard Treatment (ddAC-THP), in HER2-positive Early Breast CancerBreast Neoplasms
ACTIVE NOT_RECRUITING927 Analytics
PHASE3NOT YET_RECRUITING
T-DXd Based Therapy Followed by Endocrine Therapy Plus Dual HER2 Blockade in First-line HER2+/ HR+ Metastatic Breast Cancer and Retreatment With T-DXd
Advanced Breast CancerUnlock trial analytics
PHASE3ACTIVE NOT_RECRUITING
Trastuzumab Deruxtecan (T-DXd) Alone or in Sequence With THP, Versus Standard Treatment (ddAC-THP), in HER2-positive Early Breast Cancer
Breast NeoplasmsUnlock trial analytics

Study Endpoints

Primary Endpoints

Progression-free Survival (PFS) Rate at 24 Months
From start of Upfront Treatment phase until disease progression (PD) or death, whichever occurs first, up to approximately 24 months

PFS is defined as the time from initiation of T-DXd + pertuzumab until PD or death, whichever occurs first.

Rate of Pathologic Complete Response (pCR).
Through to definitive surgery or discontinuation/withdrawal from study, up to a maximum of approximately 40 months from randomization to primary pCR DCO (12MAR2025)

Proportion of participants who have no evidence by Hematoxylin \& Eosin (H\&E) staining of residual invasive disease in the complete resected breast specimen and all sampled regional lymph nodes (ypT0/Tis ypN0) by central evaluation following completion of neoadjuvant therapy.

Secondary Endpoints

Progression-free Survival (PFS) Rate at 12 Months
From start of Upfront Treatment phase until disease progression (PD) or death, whichever occurs first, up to approximately 12 months
Objective Response Rate
From start of Upfront Treatment phase until disease progression (PD) or death, whichever occurs first, up to approximately 24 months
Progression-free Survival (PFS) Rate From Start of Maintenance Treatment at 12 Months
From start of Maintenance Treatment until disease progression (PD) or death, whichever occurs first, up to approximately 12 months
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
T-DXdEXPERIMENTALAdult participants with previously untreated advanced or metastatic HER2+/HR+ breast cancer who will receive T-DXd intravenously every 3 weeks (IV Q3W) in 3 treatment phases: Upfront treatment phase: T-DXd + pertuzumab IV Q3W Maintenance treatment phase: Trastuzumab + palbociclib + endocrine therapy + pertuzumab IV Q3W T-DXD retreatment phase: T-DXd monotherapy IV Q3W
Arm AEXPERIMENTALTrastuzumab deruxtecan
Arm BEXPERIMENTALT-DXd, followed by THP
Arm CACTIVE_COMPARATORdoxorubicin and cyclophosphamide, followed by THP

Interventions

NameTypeDescription
Trastuzumab deruxtecanDRUGUpfront treatment: One IV infusion Q3W 5.4 mg/kg (starting dose) on Day 1 of each 21-day cycle T-DXd Retreatment: One IV infusion Q3W 5.4 mg/kg (starting dose) on Day 1 of each 21-day cycle \*Dose reductions implemented during Upfront treatment phase will be maintained.
TrastuzumabDRUGMaintenance treatment: One IV infusion Q3W 6 mg/kg on Day 1 of each 21-day cycle
PertuzumabDRUGUpfront treatment: One IV infusion Q3W loading dose of 840 mg, then 420 mg Q3W thereafter on Day 1 of each 21-day cycle Maintenance treatment: One IV infusion Q3W 420 mg on Day 1 of each 21-day cycle
Endocrine TherapyDRUGAromatase inhibitors or fulvestrant administered as approved product label
PalbociclibDRUGMaintenance treatment: Daily (3 out of 4 weeks, Q4W) oral 125 mg
PaclitaxelDRUGadministered by intravenous infusion
DoxorubicinDRUGadministered by intravenous infusion
cyclophosphamideDRUGadministered by intravenous infusion
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo

Key Inclusion Criteria for Upfront Treatment Phase 1. Sign and date the Main Trial informed consent form (ICF), prior to the start of any trial-specific procedures. 2. Participant must be ≥18 years of age at the time the ICF is signed. 3. Have pathologically documented breast cancer that: * Is ...

Countries:United StatesBrazilBulgariaCanadaChinaGermanyIndiaItalyJapanPeruPhilippinesPolandRussiaSaudi ArabiaSouth KoreaSpainTaiwanThailand
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Competitive Landscape -Breast Cancer 402 trials (matched to "Advanced Breast Cancer")

Top 20 of 92 competitors

CompanyTickerTrialsLead PhaseDrugs
AstraZeneca PLCAZN47PHASE3Fulvestrant, Capivasertib
Merck & Co., Inc.MRK12PHASE3Pembrolizumab, Paclitaxel, Doxorubicin, Epirubicin, Cyclophosphamide
Eli Lilly and CompanyLLY27PHASE3Abemaciclib, Standard Adjuvant Endocrine Therapy
BioNTech SE Sponsored ADRBNTX7PHASE3DB-1303/BNT323, T-DM1
Gilead Sciences, Inc.GILD13PHASE3Sacituzumab Govitecan-hziy, Eribulin, Capecitabine Product, Gemcitabine, Vinorelbine
Novartis AG Sponsored ADRNVS30PHASE3Ribociclib
Pfizer Inc.PFE34PHASE3ARV-471, Fulvestrant
BeOne Medicines Ltd. Sponsored ADRONC5PHASE3BGB-43395, Letrozole, Abemaciclib, Palbociclib, Ribociclib
Olema Pharmaceuticals, Inc.OLMA5PHASE3Palazestrant, Fulvestrant, Anastrozole, Letrozole, Exemestane
Jazz Pharmaceuticals Public Limited CompanyJAZZ3PHASE3Zanidatamab, Trastuzumab, Eribulin, Vinorelbine, Gemcitabine
Celcuity Inc.CELC3PHASE3Gedatolisib, Palbociclib, Fulvestrant, Alpelisib
Relay Therapeutics, Inc.RLAY2PHASE3Zovegalisib, Capivasertib, Fulvestrant
GSK plc Sponsored ADRGSK2PHASE3Niraparib
Greenwich LifeSciences, Inc.GLSI1PHASE3GLSI-100
Bristol-Myers Squibb CompanyBMY5PHASE2Iza-bren, Nab-paclitaxel, Paclitaxel, Capecitabine, Carboplatin
BriaCell Therapeutics CorpBCTX2PHASE3SV-BR-1-GM, Cyclophosphamide, Interferon infiltration of the inoculation site, Retifanlimab, Treatment of Physician's Choice
Incyte CorporationINCY4PHASE2Ruxolitinib, Capecitabine, Regorafenib
Natera, Inc.NTRA3PHASE2Discontinuation of the anti-HER2 maintenance therapy
Puma Biotechnology, Inc.PBYI3PHASE2Neratinib, Loperamide, Colesevelam
Atossa Therapeutics, Inc.ATOS1PHASE2endoxifen, goserelin
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Recent Changes (Last 90 Days)

LOWAug 11, 2026NCT05113251lastUpdatePostDate: changed
LOWAug 11, 2026NCT05113251lastUpdatePostDate: changed
LOWJun 9, 2026NCT05113251lastUpdatePostDate: changed
LOWJun 9, 2026NCT05113251lastUpdatePostDate: changed
LOWJun 9, 2026NCT05113251lastUpdatePostDate: changed
LOWJun 9, 2026NCT05113251lastUpdatePostDate: changed

Frequently asked questions about Pertuzumab

What is Pertuzumab used for?

Pertuzumab is an investigational antibody being studied for the treatment of breast cancer, including HER2-positive early breast cancer and HER2-positive, HR-positive advanced or metastatic breast cancer. It is currently in Phase 3 clinical development.

What does Pertuzumab target?

Pertuzumab is a monoclonal antibody (-mab) that targets HER2, a protein that promotes cancer cell growth. By binding to HER2, it is designed to block signaling pathways that drive tumor proliferation in HER2-positive breast cancers.

Who makes Pertuzumab?

Pertuzumab is being developed by AstraZeneca PLC, a biopharmaceutical company listed on the stock exchange under the ticker symbol AZN.

What phase is Pertuzumab in?

Pertuzumab is currently in Phase 3 clinical trials. It is an investigational drug and has not yet been approved by regulatory authorities for any indication.

What clinical trials is Pertuzumab in?

Pertuzumab is being evaluated in two Phase 3 trials. NCT05113251 is an active, not recruiting study of T-DXd alone or in sequence with THP versus standard treatment in HER2-positive early breast cancer. NCT07683754 is a not yet recruiting study of T-DXd-based therapy followed by endocrine therapy plus dual HER2 blockade in first-line HER2+/HR+ metastatic breast cancer.

Is Pertuzumab the same as trastuzumab?

No, Pertuzumab is a distinct monoclonal antibody from trastuzumab. While both target HER2, they bind to different epitopes on the HER2 receptor. In clinical trials, Pertuzumab is often studied in combination with trastuzumab as part of dual HER2 blockade therapy.