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FB102

Phase 2

Celiac Disease | Monoclonal antibody | Gastrointestinal |Forte Biosciences, Inc.|Trials Updated: Nov 20, 2025

FB102 development status

Highest phase Phase 2
Registered trials 3 across 1 sponsor since Apr 2025

FB102 target and mechanism

Molecular targetCD122
Target classProtein
ModalityMonoclonal antibody

Also known as FB102 Single dose

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials3
Total Enrollment196

FDA Designations

FAST_TRACK

FB102 clinical trials

FB102 · 3 trials · 3 indications

Phase 2 1Phase 1 2
NCT06982963Randomized, Double Blind, Placebo-controlled Phase 2 Study in Adults With Celiac DiseaseCeliac Disease
RECRUITING100 Analytics
PHASE2RECRUITING
Randomized, Double Blind, Placebo-controlled Phase 2 Study in Adults With Celiac Disease
Celiac DiseaseUnlock trial analytics

Study Endpoints

Primary Endpoints

Change from baseline in the VCIEL
78 Days

Vh:Cd and IEL Composite Scale (VCIEL)

Incidence of treatment-emergent adverse events (TEAEs) and serious adverse events (SAEs)
Upto 36 Weeks post first dose administration
Change from Baseline of Severity of Alopecia Tool (SALT) score at Week 16.
From Screening through Week 16.

The Severity of Alopecia Tool (SALT) score ranges from 0 (no scalp hair loss) to 100 (complete scalp hair loss), with higher scores indicating greater severity. Change from baseline in SALT score at Week 16 will assess treatment effect. The AA-IGA categorizes SALT scores as follows: 0 = None (0%), 1 = Limited (1-20%), 2 = Moderate (21-49%), 3 = Severe (50-94%), 4 = Very Severe (95-100%).

Number of participants with treatment-emergent adverse events (TEAEs) and Serious Adverse events (SAE) following treatment with FB102
Upto 16 Weeks post first dose administration
Percent change from Baseline in central read facial-vitiligo area scoring index (F-VASI)
Upto 16 Weeks post first dose administration

The VASI Score is used to assess the severity and extent of Vitilgo. F-VASI is calculated using a formula that includes involvement of the face (possible range, 0-4), with percentage of vitiligo involvement estimated in finger units by the same investigator throughout the study

Number of participants with percent change from Baseline in central read facial-vitiligo area scoring index (F-VASI)
Upto 16 Weeks post first dose administration

The VASI Score is used to assess the severity and extent of Vitilgo. F-VASI is calculated using a formula that includes involvement of the face (possible range, 0-4), with percentage of vitiligo involvement estimated in finger units by the same investigator throughout the study

Secondary Endpoints

Proportion of participants achieving by percent change improvement in central read F-VASI from Baseline.
Upto 16 Weeks post first dose administration
To evaluate the efficacy of FB102 compared to placebo by percent change from Baseline in total-Vitiligo Area Scoring Index (T-VASI)
Upto 16 Weeks post first dose administration
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
AEXPERIMENTALFB102
BEXPERIMENTALFB102
CPLACEBO_COMPARATORPlacebo
FB102ACTIVE_COMPARATORParticipants will receive FB102.
PlaceboPLACEBO_COMPARATORMatching placebo

Interventions

NameTypeDescription
FB102BIOLOGICALFB102 (10 mg/kg induction doses and 3 mg/kg or 5 mg/kg maintenance doses) or placebo arms in a 2:2:1 ratio.
PlaceboOTHERPlacebo
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Eligibility Criteria

Age Range18 Years to 70 Years
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: 1. Men and women aged 18 to 70 years at Screening. 2. Has documented diagnosis of CeD confirmed by intestinal biopsy and positive celiac serology at least 12 months prior to Screening (intestinal biopsy and serology do not have to be performed concurrently). 3. Body mass index (...

Countries:AustraliaNew Zealand
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Competitive Landscape -Celiac Disease 4 trials

Frequently asked questions about FB102

What is FB102?

FB102 is an investigational small molecule developed by Forte Biosciences, Inc. (ticker FBRX). It is being studied for autoimmune and inflammatory skin and gastrointestinal conditions, specifically alopecia areata, celiac disease, and vitiligo. FB102 has received FDA Fast Track designation and remains in clinical development.

What does FB102 target?

FB102 targets CD122, a protein that forms part of the receptor complex for interleukin-2. By binding CD122, FB102 is designed to modulate IL-2 signaling, which plays a central role in regulating immune cell activity relevant to autoimmune conditions such as alopecia areata, celiac disease, and vitiligo.

What is FB102 used for in alopecia areata?

FB102 is being evaluated as a treatment for severe to very severe alopecia areata. A Phase 1 study, NCT07205159, is recruiting adults aged 18 and older in Australia and New Zealand to assess the safety and efficacy of FB102 in this patient population. FB102 is investigational and has not been approved.

Who makes FB102?

FB102 is developed by Forte Biosciences, Inc., a biopharmaceutical company that trades under the ticker symbol FBRX. Forte Biosciences is advancing FB102 across multiple immune-mediated indications, including alopecia areata, celiac disease, and vitiligo.

What phase is FB102 in?

FB102 is in Phase 1 and Phase 2 clinical development. Phase 1 studies are recruiting for alopecia areata and vitiligo, while a randomized, double-blind, placebo-controlled Phase 2 study is recruiting adults with celiac disease. FB102 is investigational and has not been approved by the FDA.

What clinical trials is FB102 in?

FB102 is being studied in three recruiting trials. NCT07205159 is a Phase 1 study in severe to very severe alopecia areata in Australia and New Zealand. NCT06982963 is a Phase 2 randomized, double-blind, placebo-controlled study in celiac disease in Australia. NCT06905873 is a Phase 1 study in non-segmental vitiligo in Australia and New Zealand.

Is FB102 the same as FB102 Single dose?

Yes, FB102 Single dose is an alternative name used for FB102, the investigational small molecule developed by Forte Biosciences, Inc. (ticker FBRX). Both names refer to the same CD122-targeting compound being studied in alopecia areata, celiac disease, and vitiligo.