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GB1211

Phase 2

Metastatic Melanoma | Small molecule | Oncology |Galecto, Inc.|Last Updated: Apr 13, 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
RandomizedDouble-BlindPLACEBO_CONTROLLEDBiomarker
Total Trials1
Total Enrollment92
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05913388GB1211 and Pembrolizumab Versus Pembrolizumab and Placebo in Patients With Metastatic Melanoma and Head and Neck Squamous Cell CarcinomaPHASE2 RECRUITING 92Feb 29, 2024Feb 1, 2030Apr 13, 20261 United States
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Study Endpoints
Primary Endpoints
Overall response rate based on disease imaging
From the date of randomization until the date of first documented progression, assessed up to 63 weeks.

Determine the response of Gal-3 inhibitor and pembrolizumab versus pembrolizumab monotherapy (plus placebo) in patients with metastatic melanoma or head and neck squamous cell carcinoma (HNSCC).

Secondary Endpoints
Evaluation of GAL-3 Expression
Screening and Day 68
Evaluation of Predictive Biomarker
Day 85
Frequency of Immune-mediated Adverse Events
From the time of informed consent to week 63
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Study Design & Arms
AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
GB1211 + PembrolizumabEXPERIMENTALGB1211 will be administered orally twice a day at 400mg in combination with standard pembrolizumab treatment.
Pembrolizumab MonotherapyPLACEBO_COMPARATORPlacebo will have the same appearance as GB1211 and administered orally twice a day in combination with standard pembrolizumab treatment.
Interventions
NameTypeDescription
GB1211DRUGAdministered orally twice daily at 100mg.
PembrolizumabDRUGAdministered at a fixed dose of 200 mg every 3 weeks intravenously.
PlaceboDRUGAdministered orally twice daily at 100mg.
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Patients with unresectable or metastatic melanoma including unknown primary or mucosal melanomas. Histological confirmation of melanoma will be required by previous biopsy or cytology. Patients with recurrent or metastatic head and neck squamous cell carcinoma (HNSCC) with dis...

Countries:United States
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Competitive Landscape -Melanoma 127 trials
CompanyTickerTrialsLead PhaseDrugs
Merck & Co., Inc.MRK6PHASE3Intismeran autogene, Pembrolizumab, pembrolizumab, Pembrolizumab Berahyaluronidase alfa
Bristol-Myers Squibb CompanyBMY7PHASE3Nivolumab, Nivolumab + Relatlimab, rHuPH20, Relatlimab, relatlimab+nivolumab
Regeneron Pharmaceuticals, Inc.REGN8PHASE3Fianlimab, Cemiplimab, Pembrolizumab, fianlimab, cemiplimab
Pfizer Inc.PFE4PHASE3Encorafenib, Binimetinib, Pembrolizumab, PF-08046049, PF-07799933
IDEAYA Biosciences, Inc.IDYA4PHASE3Darovasertib, IDE196, Crizotinib, Pembrolizumab, Ipilimumab
Iovance Biotherapeutics IncIOVA6PHASE3Lifileucel plus Pembrolizumab, Pembrolizumab with Optional Crossover Period, Lifileucel, LN-145/LN-144, Cyclophosphamide
Replimune Group, Inc.REPL5PHASE3Vusolimogene Oderparepvec, Nivolumab, Pembrolizumab, Single-agent chemotherapy, RP1
Amgen Inc.AMGN1PHASE3ABP 206, Nivolumab
Immunocore Holdings Plc Shs Sponsored American Depositary Shares Repr 1 ShIMCR3PHASE3Tebentafusp, Brenetafusp, Nivolumab
Immatics N.V.IMTX2PHASE3IMA203, nivolumab plus relatlimab, lifileucel, pembrolizumab, ipilimumab
Aura Biosciences IncAURA4PHASE3Bel-sar
Novartis AG Sponsored ADRNVS6PHASE2LXH254, LTT462, Trametinib, Ribociclib, DYP688
IO Biotech, Inc.IOBT2PHASE3IO102-IO103, Pembrolizumab, Pembrolizumab KEYTRUDA
Erasca, Inc.ERAS1PHASE3Naporafenib, Dacarbazine, Temozolomide, Trametinib
AstraZeneca PLCAZN3PHASE2Ceralasertib, Durvalumab, AZD6750, rilvegostomig, Trastuzumab deruxtecan
Eikon Therapeutics, Inc.EIKN2PHASE2EIK1001, Pembrolizumab, Association atezolizumab + BDB001 + RT
Moderna, Inc.MRNA1PHASE2mRNA-4157, Pembrolizumab
Genmab A/S Sponsored ADRGMAB2PHASE2Acasunlimab, Pembrolizumab, GEN1042, Cisplatin, Carboplatin
Agenus Inc.AGEN1PHASE2Botensilimab, Balstilimab
ImmunityBio IncIBRX1PHASE2N-803 + Pembrolizumab
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Recent Changes (Last 90 Days)
LOWMay 24, 2026NCT05913388studyFirstPostDate: changed