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Ribociclib + Letrozole OR Fulvestrant

Phase 3

Metastatic Breast Cancer | Small molecule | Oncology |Novartis AG|Last Updated: Apr 29, 2025

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
RandomizedDouble-BlindCONTROLLEDDMCBiomarker
Total Trials2
Total Enrollment625
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05207709Ribociclib vs. Palbociclib in Patients With Advanced Breast Cancer Within the HER2-Enriched Intrinsic SubtypePHASE3 ACTIVE NOT_RECRUITING 456Mar 28, 2022Mar 1, 2027Apr 29, 202571 United States, Portugal +1
NCT02632045Study of Efficacy of Ribociclib After Progression on CDK4/6 Inhibition in Patients With HR+ HER2- Advanced Breast CancerPHASE2 COMPLETED 169Mar 1, 2016Jan 4, 2022Dec 6, 202413 United States
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Study Endpoints
Primary Endpoints
Progression-free survival
From date of randomization until the date of first documented progression, death, lost of follow-up, withdraw consent or the study is terminated by SOLTI, whichever occurs first, assessed up to approximately 62 months after the first patient enrolled

using RECIST 1.1 criteria, as assessed by local radiologists/investigators

Progression Free Survival (PFS)
Up to approximately 30 months

Progression free survival (PFS) is defined as the interval from the time of randomization until objective disease progression (local assessment) or death from any cause. Disease status will be assessed with comprehensive radiographic studies every three treatment cycles (approximately every 12 weeks (+/- 1 week)). Disease progression as assed by RECIST 1.1 defined as at least a 20% increase in the sum of diameters of target lesions, taking as reference the smallest sum on study (this includes the baseline sum if that is the smallest on study). In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm. (Note: the appearance of one or more new lesions is also considered progression).

Secondary Endpoints
Progression-free survival 2
From randomization until documented progression to second line of therapy, death, lost of follow-up, withdraw consent or the study is terminated by SOLTI, whichever occurs first, assessed up to approximately 62 months after the first patient enrolled
Overall Survival
until patient death, assessed up to approximately 62 months after the first patient enrolled
Overall response and clinical benefit
until disease progression or 24 weeks from treatment start.
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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Ribociclib + Endocrine TherapyEXPERIMENTALRibociclib + Fulvestrant or Letrozole
Palbociclib + Endocrine TherapyEXPERIMENTALPalbociclib + Fulvestrant or Letrozole
Paclitaxel +/- Tislelizumab - Exploratory cohortEXPERIMENTALAdditional experimental Cohort that includes patients with Basal-Like intrinsic subtype.
Ribociclib (LEE-011)/FulvestrantEXPERIMENTALLEE-011 is administered orally, 600mg, daily for 3 weeks and 1 week off. Fulvestrant is administered intramuscularly, 500mg, every 2 weeks x 3, then every 4 weeks.
Placebo/FulvestrantPLACEBO_COMPARATORPlacebo is administered orally, 600mg daily for 3 weeks and 1 week off. Fulvestrant is administered intramuscularly, 500mg, every 2 weeks x 3, then every 4 weeks.
Interventions
NameTypeDescription
Ribociclib + Letrozole OR FulvestrantDRUGEndocrine Therapy will be selected by the investigator. For premenopausal women and men: LHRH agonist once every 4 weeks
Palbociclib + Letrozole OR FulvestrantDRUGEndocrine Therapy will be selected by the investigator. For premenopausal women and men: LHRH agonist once every 4 weeks
Paclitaxel +/- TislelizumabDRUGPatients in this arm could receive as the first line of therapy
LEE-011DRUG600 mg capsule (3x 200 mg capsules)
FulvestrantDRUG500 mg injection
PlaceboDRUG600 mg capsule (3x 200 mg capsules)
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites71

Main Inclusion Criteria: * Histologically documented HR-positive and HER2-negative breast cancer by local testing * Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1. * advanced (loco regionally recurrent not amenable to curative therapy or metastatic) breast cancer. * Availabi...

Countries:United StatesPortugalSpain
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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, 2026NCT05207709studyFirstPostDate: changed