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Efineptakin alfa

Phase 2

High Grade Astrocytic Tumor | Monoclonal antibody | Oncology |Merck & Company, Inc.|Last Updated: Jan 12, 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 Enrollment54
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05465954Efineptakin Alfa and Pembrolizumab for the Treatment of Recurrent GlioblastomaPHASE2 RECRUITING 54Jan 24, 2023Oct 15, 2028Jan 12, 20261 United States
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Study Endpoints
Primary Endpoints
Overall survival rate
Up to 9 months

9-month overall survival rate (OS9) rate is defined as the number of "successes" (patients who are alive at least 9 months after beginning study therapy) divided by the total evaluable patients. All patients who have signed a consent form, are eligible, and have begun treatment in Cycle 1 (first cycle of neo-adjuvant pembrolizumab + efineptakin alfa \[NT-I7\]) will be considered evaluable for the primary endpoint.

Secondary Endpoints
Progression free survival time
From the date of starting study treatment to the date of disease progression or death resulting from any cause, whichever comes first, assessed up to 5 years
Objective response rate (ORR)
Up to 5 years
Changes in absolute lymphocyte counts (ALC)
From baseline up to 12 weeks
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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Treatment (efineptakin alfa, pembrolizumab)EXPERIMENTALBEFORE SURGERY: Patients receive pembrolizumab IV over 30 minutes and efineptakin alfa IM on day 1. Patients then undergo surgery 1 week later. AFTER SURGERY: Patients receive pembrolizumab IV over 30 minutes and efineptakin alfa IM on day 1 of each cycle. Cycles repeat every 42 days for 2 years in the absence of disease progression or unacceptable toxicity. Patients undergo MRI or CT at baseline and on study. Patients also undergo tumor biopsy at baseline and blood sample collection on study.
Interventions
NameTypeDescription
Biospecimen CollectionPROCEDURECorrelative studies
Efineptakin alfaBIOLOGICALGiven IM
PembrolizumabBIOLOGICALGiven IV
BiopsyPROCEDUREUndergo tumor biopsy
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Age \>= 18 years * Disease characteristics: * Tissue-confirmed progressive or recurrent World Health Organization (WHO) Grade IV IDH wildtype glioblastoma (including molecular glioblastoma and gliosarcoma) * Previously treated with maximum feasible resection or biopsy, ra...

Countries:United States
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