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Obefazimod

Phase 2

Moderately to Severely Active Crohn Disease | Small molecule | Immunology |Abivax SA|Last Updated: Apr 27, 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_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment212
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06456593Efficacy and Safety of Obefazimod in Subjects With Moderately to Severely Active Crohn's DiseasePHASE2 RECRUITING 212Oct 30, 2024Apr 1, 2028Apr 27, 2026149 United States, Belgium +10
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Study Endpoints
Primary Endpoints
Induction and maintenance Phase Efficacy- Crohn's Disease Activity Index (CDAI)
Week 12 and week 52

Change from baseline in Crohn's Disease Activity Index (CDAI) score at Week 12 and Week 52 The CDAI total score ranges from 0 to over 600. Higher scores mean a worse outcome.

Maintenance Phase Efficacy - Simple Endoscopic Score for Crohn's disease (SES-CD)
Week 52

Change from baseline in Simple Endoscopic Score for Crohn's disease (SES-CD) at Week 52 The SES-CD is an endoscopic grading system that consists of a composite score based on 4 components: the size of mucosal ulcers, the extent of the ulcerated surface, the endoscopic extension, and the presence of stenosis (26). Each of the 4 SES-CD components are assessed in the 5 segments of the ileum and colon: ileum, right, transverse, left, and rectum. The SES-CD is the sum of the individual scores of each of the components across the 5 segments. The total score ranges from 0 to 60. Higher scores mean a worse outcome

Maintenance Phase Efficacy - Endoscopic response
Week 52

Proportion of subjects with endoscopic response at Week 52

Maintenance Phase Efficacy - SES-CD ulcer subscore > 1
Week 52

Proportion of subjects with no SES-CD ulcer subscore \> 1 in at least one segment at Week 52

Maintenance Phase Efficacy - CDAI clinical remission
Week 52

Proportion of subjects with CDAI clinical remission at Week 52 Proportion of subjects with sustained CDAI clinical remission at Week 52

Maintenance Phase Efficacy - PRO-2 clinical remission
Week 52

Proportion of subjects with patient reported outcome (PRO)-2 clinical remission at Week 52

Maintenance Phase Efficacy - CDAI clinical response
Week 52

Proportion of subjects with CDAI clinical response (CDAI decrease from baseline ≥ 100 points) at Week 52

Maintenance Phase Efficacy - PRO-2 clinical response
Week 52

Proportion of subjects with PRO-2 clinical response (≥ 30% decrease in average daily PRO-2 score (AP + SF) and both no higher than baseline) at Week 52

Maintenance Phase Efficacy - CDAI clinical response and endoscopic response
Week 52

Proportion of subjects with CDAI clinical response and endoscopic response at Week 52

Maintenance Phase Efficacy - endoscopic remission
Week 52

Proportion of subjects with endoscopic remission at Week 52

Extension Phase Safety- Adverse events
Weeks 64, 76, 88,100 and EOS

Incidence of all treatment-emergent adverse events (TEAEs), serious adverse events (SAEs) and causally related TEAEs/SAEs Incidence of adverse events (AEs) leading to discontinuation

Extension Phase Safety - Hematology and coagulation
Weeks 64, 76, 88,100 and EOS

Number of patients with clinically-significant abnormal laboratory parameters. Hematology: Hematocrit, hemoglobin, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, mean corpuscular volume, platelet count, red blood cells; white blood cells Coagulation: International normalized ratio, activated partial thromboplastin time, fibrinogen, prothrombin time

Extension Phase Safety - Biochemistry
Weeks 64, 76, 88,100 and EOS

Number of patients with clinically-significant abnormal laboratory parameters. Albumin, total protein, aspartate aminotransferase (AST), alanine transaminase (ALT), alkaline phosphatase (ALP), total bilirubin, gamma glutamyl transferase (GGT), lactate dehydrogenase (LDH), lipase, amylase, creatinine, creatinine clearance, urea, chloride, bicarbonate, sodium, potassium, calcium, phosphate, uric acid, glucose, total cholesterol, LDL cholesterol (direct), HDL cholesterol, triglycerides, creatine phosphokinase (CPK), high sensitivity troponin I and T, N-terminal prohormone of brain natriuretic peptide (NT-proBNP)

Secondary Endpoints
Induction Phase Efficacy - SES-CD
Week 12
Induction Phase Efficacy - Endoscopic response
Week 12
Induction Phase Efficacy-SES-CD ulcer subscore > 1
Week 12
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Obefazimod 50mgEXPERIMENTALObefazimod 50mg given once-daily (QD) in subjects with moderately to severely active Crohn's disease (CD)
Obefazimod 25mgEXPERIMENTALObefazimod 25mg given once-daily (QD) in subjects with moderately to severely active Crohn's disease (CD)
Obefazimod 12.5mgEXPERIMENTALObefazimod 12.5mg given once-daily (QD) in subjects with moderately to severely active Crohn's disease (CD)
PlaceboPLACEBO_COMPARATORPlacebo given once-daily (QD) in subjects with moderately to severely active Crohn's disease (CD)
Interventions
NameTypeDescription
ObefazimodDRUGObefazimod is administered once-daily in fed condition (ideally at the same time in the morning).
PlaceboOTHERMatching placebo will be administered QD in fed condition (ideally at the same time in the morning).
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Eligibility Criteria
Age Range18 Years — 75 Years
SexALL
Healthy VolunteersNo
Study Sites149

Inclusion Criteria: 1. Male or female (at birth) 18 to 75 years old and able to understand, sign, and date the written voluntary informed consent at the visit prior to any protocol-specified procedures 2. Able and willing to comply with study visits and procedures as per protocol. 3. Confirmed and ...

Countries:United StatesBelgiumCzechiaFranceGermanyHungaryItalyNetherlandsPolandRomaniaSlovakiaSpain
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT06456593primaryCompletionDate: changed
LOWMay 24, 2026NCT06456593studyFirstPostDate: changed