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Asciminib and Trastuzumab

Phase 1

HER2+ Metastatic Breast Cancer | Monoclonal antibody | Oncology |Novartis AG|Last Updated: May 6, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
UNCONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment42
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT07136428Asciminib in HER2+ Breast Cancer Brain MetastasesPHASE1 NOT YET_RECRUITING 42Jul 1, 2026Nov 1, 2032May 6, 2026 -
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Study Endpoints
Primary Endpoints
Number of participants with a dose-limiting toxicity at each dose level
Day 1 of treatment until 30 days post last dose

Safety of administering asciminib in combination with trastuzumab by measuring number of participants with a dose-limiting toxicity at each dose level

Number of participants with a complete response (CR) or partial response (PR)
Day 1 of treatment through up to 112 weeks

Efficacy at maximum tolerated dose (MTD) determined by the number of participants with a complete response (CR) or partial response (PR) as determined by Response Assessment in Neuro-Oncology (RANO) Criteria for Brain Metastases (RANO-BM).

Secondary Endpoints
Median time to progression
Day 1 of treatment through up to 112 weeks
Progression Free Survival (PFS)
Day 1 of treatment through up to 110 weeks
Overall Survival (OS)
Day 1 of treatment through up to 110 weeks
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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Asciminib TrastuzumabEXPERIMENTALCombination of asciminib and trastuzumab
Interventions
NameTypeDescription
Asciminib and TrastuzumabCOMBINATION_PRODUCTEach study treatment cycle will last 21 days. Asciminib will be taken orally every day during the treatment period at the dose determined as the MTD during the safety lead-in in combination with trastuzumab at a standard dose of 6mg/kg IV. Asciminib dose will begin at 80 mg daily (dose level 1), with a potential range from 40 mg daily (dose level -1A, with trastuzumab) to 200 mg bid (dose level 3, with trastuzumab) depending on the results of the safety lead-in. Trastuzumab will be given intravenously (IV) or subcutaneously (SQ) on Day 1 of each 21 day cycle.
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Eligibility Criteria
Age Range18 Years — N/A
SexFEMALE
Healthy VolunteersNo

Inclusion Criteria: * Age ≥18 years at the time of consent * Patients with HER2+ metastatic breast cancer with at least one progressive or new brain metastasis measuring \>5mm; prior local therapy to other intracranial lesions allowed * At least 1 prior standard of care therapy for metastatic disea...

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Competitive Landscape -Breast Cancer 408 trials
CompanyTickerTrialsLead PhaseDrugs
Merck & Co., Inc.MRK12PHASE3Pembrolizumab, Paclitaxel, Doxorubicin, Epirubicin, Cyclophosphamide
AstraZeneca PLCAZN47PHASE3Fulvestrant, Capivasertib, Trastuzumab Deruxtecan, Paclitaxel, Trastuzumab
Gilead Sciences, Inc.GILD13PHASE3Sacituzumab Govitecan-hziy, Eribulin, Capecitabine Product, Gemcitabine, Vinorelbine
Eli Lilly and CompanyLLY27PHASE3Abemaciclib, Standard Adjuvant Endocrine Therapy, Imlunestrant, Tamoxifen, Anastrozole
BioNTech SE Sponsored ADRBNTX7PHASE3DB-1303/BNT323, T-DM1, Capecitabine, Paclitaxel, Nab-paclitaxel
Novartis AG Sponsored ADRNVS30PHASE3Ribociclib, Alpelisib, Fulvestrant, Trastuzumab, Pertuzumab
Olema Pharmaceuticals, Inc.OLMA5PHASE3Palazestrant, Fulvestrant, Anastrozole, Letrozole, Exemestane
Pfizer Inc.PFE34PHASE3ARV-471, Fulvestrant, PF-07220060, letrozole, abemaciclib
BeOne Medicines Ltd. Sponsored ADRONC6PHASE3BGB-43395, Letrozole, Abemaciclib, Palbociclib, Ribociclib
Jazz Pharmaceuticals Public Limited CompanyJAZZ3PHASE3Zanidatamab, Trastuzumab, Eribulin, Vinorelbine, Gemcitabine
Celcuity Inc.CELC3PHASE3Gedatolisib, Palbociclib, Fulvestrant, Alpelisib, Arm A: Gedatolisib + Palbociclib + Fulvestrant
Relay Therapeutics, Inc.RLAY2PHASE3RLY-2608, Capivasertib, Fulvestrant, Palbociclib, Ribociclib
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, Pembrolizumab, Axatilimab
Natera, Inc.NTRA3PHASE2Discontinuation of the anti-HER2 maintenance therapy
Puma Biotechnology, Inc.PBYI3PHASE2Neratinib, Loperamide, Colesevelam, Alisertib, Endocrine therapy
Immutep Ltd Sponsored ADRIMMP1PHASE2eftilagimod alpha, Paclitaxel
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Recent Changes (Last 90 Days)
LOWMay 24, 2026NCT07136428studyFirstPostDate: changed