A Study to Evaluate the Safety and Efficacy of OPB-101 in Platinum-resistant Ovarian Cancer
A Phase 1a/b Study to Evaluate the Safety and Efficacy of OPB-101, an Autologous Mesothelin (MSLN) CAR T Cell Therapy With Antigen-dependent Expression of OUTSMART™ Designed IL-2 Cytokine in Platinum-resistant Ovarian Cancer
1 other identifier
interventional
30
1 country
4
Brief Summary
The goal of this clinical trial is to learn if OPB-101 is safe in platinum resistant ovarian cancer participants and also to find the optimal dose of OPB-101. Participants will have their own T cells modified in a laboratory and given back to them as OPB-101 in this one-time treatment. Participants will be in the hospital when they receive OPB-101 and then be checked at the clinical site frequently for the first few months.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P25-P50 for phase_1
Started Jun 2025
Longer than P75 for phase_1
4 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
June 12, 2025
CompletedStudy Start
First participant enrolled
June 16, 2025
CompletedFirst Posted
Study publicly available on registry
June 22, 2025
CompletedPrimary Completion
Last participant's last visit for primary outcome
May 15, 2028
ExpectedStudy Completion
Last participant's last visit for all outcomes
May 15, 2030
December 18, 2025
December 1, 2025
2.9 years
June 12, 2025
December 11, 2025
Conditions
Keywords
Outcome Measures
Primary Outcomes (3)
Safety
Incidence of dose-limiting toxicities (DLTs)
28 days
Safety
Incidence of all treatment-emergent adverse events (TEAEs); Grade 3, 4, 5 TEAEs, serious adverse events (SAEs); deaths due to TEAEs and all deaths
2 years
Safety
To determine the maximum tolerated dose (MTD) of OPB-101 and/or recommended Phase 1b dose(s)
2 years
Study Arms (1)
OPB-101 Treatment Arm
EXPERIMENTALInterventions
An autologous mesothelin (MSLN) CAR T cell therapy with antigen-dependent expression of OUTSMART designed IL-2 cytokine
Eligibility Criteria
You may qualify if:
- Age ≥ 18 years of age at the time of signing the informed consent form.
- Histologically confirmed diagnosis of high grade serous epithelial ovarian, peritoneal, or fallopian tube cancer based on local histopathological findings.
- Recurrent platinum-resistant disease defined as: Disease that has recurred within 6 months of the last receipt of platinum-based therapy.
- Received at least 2 prior lines of systemic chemotherapy including a platinum-based chemotherapy.
- Received prior therapy with a PARP inhibitor if the subject has a known germline or somatic BRCA1/2 mutation.
- Measurable disease.
- Consent to provide archived tumor tissue sample.
- ECOG performance status of 0 or 1.
- Adequate organ function.
- Alkaline phosphatase ≤ 2.5 x ULN
- ≤ Grade 1 dyspnea and oxygen saturation levels (SpO2) \> 92% on room air.
- LVEF ≥ 50%
- Life expectancy of ≥ 3 months
- Adequate venous access.
- Negative screen for infectious disease markers.
- +2 more criteria
You may not qualify if:
- Women of child-bearing potential who are pregnant or breastfeeding.
- Uncontrolled bacterial, fungal, or viral infections.
- Active infection requiring systemic therapy.
- Bleeding or thrombotic disorders or at risk for severe hemorrhage.
- Any form of primary immunodeficiency.
- Had an allogenic tissue/solid organ transplant.
- Active autoimmune disease.
- Concurrent treatment with systemic high dose corticosteroids.
- Unresolved acute effects of any prior therapy.
- Active invasive cancer other than the cancer under study.
- Significant lung disease.
- Clinically significant pericardial effusion.
- Prior radiotherapy within 2 weeks of start of study intervention.
- No major surgery within 28 days prior to enrollment.
- Received investigational agents or tumor vaccines.
- +6 more criteria
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (4)
Karmanos Cancer Institute
Detroit, Michigan, 48201, United States
University of Minnesota
Minneapolis, Minnesota, 55455, United States
Roswell Park
Buffalo, New York, 14203, United States
MD Anderson Cancer Center
Houston, Texas, 77030, United States
MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Central Study Contacts
Study Design
- Study Type
- interventional
- Phase
- phase 1
- Allocation
- NA
- Masking
- NONE
- Purpose
- TREATMENT
- Intervention Model
- SINGLE GROUP
- Sponsor Type
- INDUSTRY
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
June 12, 2025
First Posted
June 22, 2025
Study Start
June 16, 2025
Primary Completion (Estimated)
May 15, 2028
Study Completion (Estimated)
May 15, 2030
Last Updated
December 18, 2025
Record last verified: 2025-12
Data Sharing
- IPD Sharing
- Will not share