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CRB-701

Phase 3

Oropharyngeal Carcinoma (OPC) | Small molecule | Oncology |Corbus Pharmaceuticals Holdings, Inc.|Last Updated: Aug 31, 2026

Target and mechanism

Molecular targetNectin-4
Target classProtein
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

RandomizedACTIVE_CONTROLLEDDMC
Total Trials1
Total Enrollment260

FDA Designations

FAST_TRACK

Clinical trial landscape

CRB-701 · 2 trials · 2 indications

Phase 3 1Phase 1 1
NCT07768189A Study to Evaluate CRB-701 Compared to Investigator's Choice Therapy in Previously Treated Oropharyngeal Squamous Cell CarcinomaOropharyngeal Carcinoma (OPC)
NOT YET_RECRUITING260 Analytics
PHASE3NOT YET_RECRUITING
A Study to Evaluate CRB-701 Compared to Investigator's Choice Therapy in Previously Treated Oropharyngeal Squamous Cell Carcinoma
Oropharyngeal Carcinoma (OPC)Unlock trial analytics

Study Endpoints

Primary Endpoints

Objective Response Rate (%)
Up to 24 months

Measured using RECIST version 1.1 by Blinded Independed Central Review (BICR)

Overall Survival (months)
Approximately 3 years from randomization

Median time to death from any cause

Part A: To confirm the safety and tolerability and determine MTD and PADR for CRB-701
21 days

Occurrence of Dose Limiting Toxicities as defined in the protocol

Part B & C: To evaluate efficacy in terms of Objective Response Rate (ORR)
Up to 6 months

ORR is the percentage of participants that achieve a response (CR + PR) using RECIST 1.1

Secondary Endpoints

Progression Free Survival (Months)
up to 24 months from randomization
Duration of Response (Months)
Up to approximately 2 years
Change in baseline in EORTC QLQ-C30 functional and symptom scales
up to approximately 2 years
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Study Design & Arms

AllocationRANDOMIZED
MaskingSINGLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
CRB-701EXPERIMENTAL3.6mg/Kg CRB-701 administered intravenously Q3W.
Investigator's Choice monotherapyACTIVE_COMPARATORInvestigator's choice of capecitabine, cetuximab or docetaxel
Part A Dose Escalation - CRB-701 Dose Level 1EXPERIMENTALCRB-701 Dose level 1, intravenous infusion over 30 mins, Dose schedule 1
Part A Dose Escalation - CRB-701 Dose Level 2EXPERIMENTALCRB-701 Dose Level 2, intravenous infusion over 30 mins, Dose schedule 1
Part A Dose Escalation - CRB-701 Dose Level 3EXPERIMENTALCRB-701 Dose Level 3, intravenous infusion over 30 mins, dose schedule 1
Part A Dose Escalation - CRB-701 Dose Level 4EXPERIMENTALCRB-701 Dose Level 4, intravenous infusion over 30 mins, dose schedule 1
Part B Dose Optimization: CRB-701 High doseEXPERIMENTALSelected high dose of CRB-701, intravenous infusion over 30 mins, dose schedule 1
Part B Dose Optimization: CRB-701 low doseEXPERIMENTALSelected Low dose of CRB-701, intravenous infusion over 30 mins
Part C Dose Expansion - Cohort 1EXPERIMENTALRecommended CRB-701 dose and schedule, intravenous infusion over 30 mins followed by infusion with anti-PD-1
Part C Dose Expansion - Cohort 2EXPERIMENTALRecommended CRB-701 dose and schedule, intravenous infusion over 30 mins
Part C Dose Expansion - Cohort 3EXPERIMENTALRecommended CRB-701 dose and schedule, intravenous infusion over 30 mins followed by infusion with anti-PD-1
Part C Dose Expansion - Cohort 4EXPERIMENTALRecommended CRB-701 dose and schedule, intravenous infusion over 30 mins
Part C Dose Expansion - Cohort 5EXPERIMENTALRecommended CRB-701 dose and schedule, intravenous infusion over 30 mins followed by infusion with anti-PD-1
Part B Dose Optimization: CRB-701 high dose combined with anti-PD-1EXPERIMENTALSelected high dose of CRB-701, intravenous infusion over 30 mins followed by infusion with anti-PD-1
Part B Dose Optimization: CRB-701 low dose combined with anti-PD-1EXPERIMENTALSelected low dose of CRB-701, intravenous infusion over 30 mins followed by infusion with anti-PD-1
Part C Dose Expansion - Cohort 6EXPERIMENTALRecommended CRB-701 dose and schedule, intravenous infusion over 30 mins
Part C Dose Expansion - Cohort 7EXPERIMENTALRecommended CRB-701 dose and schedule, intravenous infusion over 30 mins followed by infusion with anti-PD-1

Interventions

NameTypeDescription
CRB-701DRUGCRB-701 3.6mg/Kg administered intravenously every 21 days (Q3W)
capcitabineDRUG1250 mg/m2 twice daily on days 1-14 of each 21-day cycle
Cetuximab (EGFR inhibitor)DRUG400mg/m2 loading dose followed by 250mg/m2 weekly as an IV infusion or 500mg/m2 every 2 weeks.
DocetaxelDRUG75 mg/m2 as an IV infusion on day 1 of each 21-day cycle or 30 mg/m2 weekly to escalate to 40 mg/m2, if tolerated.
Anti-PD-1DRUGcheckpoint inhibitor
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites29

Inclusion Criteria: * Histological and/or cytological confirmed diagnosis of OPSCC arising from tonsils, base of tongue, soft palate and posterior pharyngeal wall, with evidence of metastatic or recurrent disease not amenable to standard therapy with curative intent. * Either second or third-line O...

Countries:United StatesAustriaUnited KingdomFranceItalyMoldovaRomaniaSpain
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Recent Changes (Last 90 Days)

LOWAug 31, 2026NCT07768189lastUpdatePostDate: changed
LOWAug 31, 2026NCT07768189lastUpdatePostDate: changed
LOWAug 26, 2026NCT07768189lastUpdatePostDate: changed
LOWAug 26, 2026NCT07768189lastUpdatePostDate: changed
LOWAug 20, 2026NCT07768189lastUpdatePostDate: changed
LOWAug 20, 2026NCT07768189lastUpdatePostDate: changed
LOWAug 17, 2026NCT07768189NEW_TRIAL: changed
LOWAug 17, 2026NCT07768189NEW_TRIAL: changed
MEDIUMAug 1, 2026NCT06265727Phase: PHASE1/PHASE2 → PHASE1
MEDIUMAug 1, 2026NCT06265727Phase: PHASE1/PHASE2 → PHASE1
MEDIUMAug 1, 2026NCT06265727Phase: PHASE1/PHASE2 → PHASE1

Frequently asked questions about CRB-701

What is CRB-701 used for?

CRB-701 is an investigational small molecule being studied for the treatment of oropharyngeal carcinoma (OPC) and solid tumors in adults. It is currently in clinical development, with a Phase 3 trial planned for previously treated oropharyngeal squamous cell carcinoma and a Phase 1/2 trial for solid tumors.

What does CRB-701 target?

CRB-701 targets Nectin-4, a protein involved in cell adhesion that is overexpressed in certain tumors. By targeting Nectin-4, the drug aims to deliver therapeutic effects specifically to cancer cells. This mechanism is being evaluated in clinical trials for oropharyngeal carcinoma and solid tumors.

Who makes CRB-701?

CRB-701 is being developed by Corbus Pharmaceuticals Holdings, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol CRBP. The company is conducting clinical trials to evaluate the drug's safety and efficacy in oncology indications.

What phase is CRB-701 in?

CRB-701 is in Phase 3 clinical development for oropharyngeal carcinoma, with a randomized, active-controlled trial planned. It is also being studied in a Phase 1/2 trial for solid tumors. The drug has received Fast Track designation from the FDA, but it is not yet approved and remains investigational.

What clinical trials is CRB-701 in?

CRB-701 is being evaluated in two clinical trials. NCT06265727 is a Phase 1/2 study in solid tumors, currently recruiting in the US and Europe. NCT07768189 is a Phase 3 study comparing CRB-701 to investigator's choice therapy in previously treated oropharyngeal squamous cell carcinoma, not yet recruiting.

Is CRB-701 the same as any other drug?

No alternative names for CRB-701 have been disclosed. It is a distinct investigational compound developed by Corbus Pharmaceuticals. Readers searching for this drug should use the name CRB-701, as no other designations have been reported.