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ST-067

Phase 1

Cancer | Monoclonal antibody | Oncology |Merck & Company, Inc.|Last Updated: Nov 15, 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
CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment316
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT04787042Phase 1a and Phase 2 Study for Safety, Preliminary Efficacy, PK and PD of ST-067PHASE1 RECRUITING 316Aug 6, 2021Dec 31, 2025Nov 15, 20246 United States
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Study Endpoints
Primary Endpoints
Determine the maximum tolerated dose of ST-067 in phase 1a monotherapy
Day 29

Patients will be enrolled at a dose level that is predicted to be the MTD

Evaluate the overall safety and tolerability of ST-067 in combination with pembrolizumab
Day 29

In patients experiencing insufficient response to a checkpoint inhibitor (PD-1) therapy administered alone or in combination.

Number of Participants With Treatment-Related Adverse Events
Day 29

AE assessed by CTCAE 5.0

Initial assessment of efficacy in phase 2
At 8 weeks

Investigator-assessed ORR, defined as either a complete response (CR) or partial response (PR) by Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 based on computed tomography (CT) or magnetic resonance imaging (MRI) scans

Secondary Endpoints
PK
Day 29
ADA
Day 29
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Phase 1a, Dose EscalationEXPERIMENTALIn the Phase 1a monotherapy study, the starting dose of ST-067 will be 30 μg/kg, with a total of 7 dose level cohorts planned. The starting dose for the IV infusion monotherapy dosing will be 60 µg/kg. Patients will be treated every week with ST-067 in all cohorts. The DLT period is 28 days after the initial dose of ST-067. According to the mTPI schema initially there will be 3 patients per cohort until the first DLT is observed at which point cohorts will be expanded according to the predetermined mTPI design. Up to 12 patients will be treated at the RP2D.
Phase 2, ExpansionEXPERIMENTALPhase 2 will enroll patients aged 18 years or older diagnosed with the following solid tumors: melanoma, renal cell carcinoma (RCC), triple negative breast cancer (TNBC), non-small cell lung cancer (NSCLC), squamous cell carcinoma of the head and neck (SCCHN), and microsatellite instability-high (MSI-Hi) tumors at the RP2D.
Phase 1a, Dose Escalation, ST-067 SC + Obinutuzumab Pre-treatmentEXPERIMENTALPatients will be treated every week with ST-067 in all cohorts. The DLT period is 28 days after the initial dose of ST-067. According to the mTPI schema initially there will be 3 patients per cohort until the first DLT is observed at which point cohorts will be expanded according to the predetermined mTPI design. The starting dose for ST-067 with obinutuzumab pre-treatment will be 120µg/kg. Obinutuzumab will be administered at 1000 mg daily via IV infusion on 2 consecutive days, with the first dose given at least 7 days prior to first dose of SC ST-067.
Phase 1 combination therapyEXPERIMENTALPhase 1 dose escalation in combination with pembrolizumab will start at a dose of 30 µg/kg of ST-067 and 200 mg every 3 weeks of pembrolizumab. Patients will be treated every week with ST-067 and every three weeks with pembrolizumab. The MTD will be determined based on the mTPI design.
Interventions
NameTypeDescription
ST-067BIOLOGICALST-067 is an engineered variant of human interleukin-18.
Obinutuzumab 25 MG/1 ML Intravenous Solution [GAZYVA]BIOLOGICALObinutuzumab is a humanized anti-CD20 monoclonal antibody of the IgG1 subclass. It recognizes a specific epitope of the CD20 molecule found on B-cells.
pembrolizumabBIOLOGICALPembrolizumab is a potent humanized immunoglobulin G4 monoclonal antibody.
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites6

Inclusion Criteria: 1. Male and female patients aged ≥18 years 2. Must provide written informed consent and any authorizations required by local law 3. Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 4. Have histologically or cytologically confirmed diagnosis of advanced/meta...

Countries:United States
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