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TBio-4101

Phase 1

Squamous Cell Carcinoma of Head and Neck | Monoclonal antibody | Oncology |Turnstone Biologics Corp.|Last Updated: Apr 1, 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
CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment7
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06236425TBio-4101 and Pembro wi/ or w/o Chemo in Recurrent/Metastatic HNSCCPHASE1 ACTIVE NOT_RECRUITING 7Mar 14, 2024Aug 1, 2026Apr 1, 20261 United States
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Study Endpoints
Primary Endpoints
Safety and tolerability
Up to 2 years

The incidence of treatment-emergent adverse events will be tabulated using NCI CTCAE v5.0

Secondary Endpoints
Overall Response Rate (ORR)
Up to 5 years
Durable Response Rate (DRR)
Up to 5 years
Duration of Response (DoR)
Up to 5 years
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
TIL Harvest/Standard of care Treatment PhaseOTHERParticipants will undergo tumor harvest for TIL and then receive 2 to 3 cycles of pembrolizumab or pembrolizumab/platinum chemotherapy (cisplatin or carboplatin / 5-FU) as per standard of care.
TBio-4101 TreatmentEXPERIMENTALParticipants without radiographic response (progressive disease) after pembrolizumab or pembrolizumab/platinum chemotherapy, and who meet eligibility requirements, will transition to receive TBio-4101. Participants will receive TBio-4101 infusion and after completion of TBio-4101 infusion, IL-2 will be administered every 8 hours, for up to 6 doses. Finally, pembrolizumab will be administered on Day 14, Day 35, and Day 56 and Q6W (beginning Week 12) thereafter for up to 2 years until discontinuation.
Interventions
NameTypeDescription
TBio-4101BIOLOGICALTBio-4101 is a tumor-infiltrating lymphocyte (TIL) product that involves the use of special immune cells called T-cells. A T-cell is a type of lymphocyte, or white blood cell.
PembrolizumabDRUGWill be administered as per standard of care. Participants with initial partial or complete radiographic response will continue on the same therapy at the discretion of the treating physician.
Platinum based chemotherapyDRUGWill be administered as per standard of care. Participants with initial partial or complete radiographic response will continue on the same therapy at the discretion of the treating physician.
CyclophosphamideDRUGParticipants who proceed to TBio-4101 treatment will receive Cyclophosphamide as part of a non-myeloablative lymphodepletion (NMA-LD) chemotherapy regimen prior to TBio-4101 infusion.
FludarabineDRUGParticipants who proceed to TBio-4101 treatment will receive Fludarabine as part of a non-myeloablative lymphodepletion (NMA-LD) chemotherapy regimen prior to TBio-4101 infusion.
AldesleukinDRUGAfter completion of TBio-4101 infusion, Aldesleukin will be administered every 8 hours, for up to 6 doses.
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Patients must have pathologically confirmed, recurrent, unresectable or metastatic solid tumors of HNSCC, excluding nasopharyngeal and nasal cavity carcinomas, and must have received no prior treatment for metastatic disease. * Patients must have at least 1 cm3 (1.1 g) of viab...

Countries:United States
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT06236425primaryCompletionDate: changed
LOWMay 24, 2026NCT06236425studyFirstPostDate: changed