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OSE2101

Phase 2

Platinum-sensitive Ovarian Cancer | Small molecule | Oncology |Merck & Company, Inc.|Last Updated: Dec 2, 2024

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
RandomizedNO_TREATMENT_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment180
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT04713514OSE2101 Alone or in Combination With Pembrolizumab vs BSC in Patient With Platinum-sensitive Recurrent OCPHASE2 ACTIVE NOT_RECRUITING 180Aug 5, 2021Dec 1, 2025Dec 2, 202440 Belgium, France +1
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Study Endpoints
Primary Endpoints
Progression free survival (PFS)
from date to randomization to date of event, assessed up to 4 years

Progression-free survival (PFS) is the time from randomization to progression measured radiologically using RECIST v1.1 guidelines as reported by the investigator or death, whatever the cause, whichever comes first. Patients alive and free of progression at the cut-off date will be censored at the last tumor assessment date

Secondary Endpoints
Objective response rate (ORR)
from date to randomization to date of event, assessed up to 4 years
Incidence of treatment emergent adverse events
from date to randomization to date of study end, assessed up to 4 years
Time to subsequent first treatments (TTST-1)
from date to randomization to date of event, assessed up to 4 years
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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Arm A : Best Supportive CareNO_INTERVENTIONObservational arm (Standard of care)
Arm B : OSE2101EXPERIMENTALOSE2101 monotherapy - subcutaneous injection on day 1, every 3 weeks for 7 doses then every 6 weeks up to week 48 and then every 12 weeks until intolerance, disease progression, or up to 2 years. OSE2101 vaccine is an emulsion of peptides suspension in in Montanide® ISA 51 adjuvant and containing 0.5 mg/mL of each 10 synthetically manufactured peptides (5.0 mg/mL total peptide) in 1.5 mL of emulsion.
Arm C : OSE2101 + PembrolizumabEXPERIMENTALOSE2101 (subcutaneous injection on day 1, every 3 weeks for 7 doses then every 6 weeks up to week 48 and then every 12 weeks until intolerance, disease progression, or up to 2 years) + pembrolizumab (400 mg IV infusion on day 1 every 6 weeks until intolerance, disease progression, or up to 2 years.
Interventions
NameTypeDescription
OSE2101DRUGsubcutaneous injection on day 1, every 3 weeks for 7 doses then every 6 weeks up to week 48 and then every 12 weeks until intolerance, disease progression, or up to 2 years.
Pembrolizumab 25 MG/ML [Keytruda]DRUG400 mg IV infusion on day 1 every 6 weeks until intolerance, disease progression, or up to 2 years.
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Eligibility Criteria
Age Range18 Years — N/A
SexFEMALE
Healthy VolunteersNo
Study Sites40

Inclusion Criteria: 1. Signed and dated informed consent document for the study, willing and able to comply with protocol requirements, including: 1. HLA-A2 phenotype determination by genetic test (blood) 2. participation in translational research in HLA-A2 positive 3. authorization for l...

Countries:BelgiumFranceGermany
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Recent Changes (Last 90 Days)
LOWMay 24, 2026NCT04713514studyFirstPostDate: changed