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foselutoclax

Phase 2

Diabetic Macular Edema | Small molecule | Metabolic |Unity Biotechnology, Inc.|Trials Updated: Aug 5, 2025

foselutoclax development status

Highest phase Phase 2
Registered trials 3 across 1 sponsor since Sep 2020

foselutoclax target and mechanism

ModalitySmall molecule

Also known as UBX1325

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLEDDMC
Total Trials3
Total Enrollment136

FDA Designations

No designations recorded

foselutoclax clinical trials

foselutoclax · 3 trials · 11 indications

Phase 2 2Phase 1 1
NCT06011798Assess the Efficacy and Safety of Repeat Intravitreal Injections of Foselutoclax (UBX1325) in Patients With DME (ASPIRE)Diabetic Macular Edema
COMPLETED52 Analytics
NCT04857996Safety, Tolerability and Evidence of Activity Study of UBX1325 in Patients With Diabetic Macular Edema (BEHOLD)Diabetic Macular Edema (DME)
COMPLETED65 Analytics
PHASE2COMPLETED
Assess the Efficacy and Safety of Repeat Intravitreal Injections of Foselutoclax (UBX1325) in Patients With DME (ASPIRE)
Diabetic Macular EdemaUnlock trial analytics
PHASE2COMPLETED
Safety, Tolerability and Evidence of Activity Study of UBX1325 in Patients With Diabetic Macular Edema (BEHOLD)
Diabetic Macular Edema (DME)Unlock trial analytics

Study Endpoints

Primary Endpoints

Mean Change From Baseline to Average of Week 20 and Week 24 in BCVA by ETDRS Letter
Week 24

Mean change from baseline to the average of Week 20 and Week 24 in Best-Corrected Visual Acuity (BCVA) by Early Treatment Diabetic Retinopathy Study (ETDRS) letter

Systemic Safety and Tolerability of a Single IVT Injection of UBX1325.
48 weeks

The systemic safety and tolerability is evaluated by incidence of Treatment Emergent Adverse Events (TEAEs) by System organ class Preferred Term.

Ocular Safety and Tolerability of a Single IVT Injection of UBX1325
Up to Week 12, 24 and 48 weeks

Ocular Safety is evaluated by incidence of Treatment Emergent Adverse Events (TEAEs). Ocular TEAEs consisted of progression of disease or were related to the IVT injection component of the UBX1325 drug administration process

Ocular and systemic safety and tolerability of a single intravitreal injection of UBX1325 evaluated by the incidence of dose limiting toxicities (DLTs) and treatment emergent adverse events (TEAEs)
24 weeks

Secondary Endpoints

Assess Other Efficacy Outcome - Changes in BCVA From Baseline to Week 36
36 weeks
Assess Other Efficacy Outcome - Changes in CST From Baseline to Week 36
36 weeks
Assess Other Efficacy Outcome - Rescue Metrics
36 weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Anti-VEGF control armACTIVE_COMPARATORPrior to randomization, participants will receive 3 IVT injections of aflibercept over 4-week intervals. Upon randomization, participants will receive 2 mg aflibercept (50 μl of 40 μg/μl solution) IVT on Day 1, Weeks 8, and 16. A sham procedure will also be administered on Day 1.
foselutoclax armEXPERIMENTALPrior to randomization, participants will receive 3 IVT injections of aflibercept over 4-week intervals. Upon randomization, participants will receive 10 μg foselutoclax (50 μl of 0.2 μg/μl solution) IVT on Day 1 and Weeks 8 and 16. 2 mg aflibercept (50 μl of 40 μg/μl solution) will also be administered on Day 1.
UBX1325EXPERIMENTAL -
Sham ControlSHAM_COMPARATOR -
Treatment with UBX1325EXPERIMENTALUBX1325, single intravitreal injection, ascending dose

Interventions

NameTypeDescription
AfliberceptDRUGAnti-VEGF control
foselutoclaxDRUGExperimental drug
UBX1325DRUGPatients will be administered a single 50 μL UBX1325 IVT injection
ShamOTHERSham procedure
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites19

Inclusion Criteria: * Patients aged ≥18 years. * Patients with nonproliferative DR and DME * Center-involved DME with Central Subfield Thickness (CST) ≥325-900 μm * BCVA in the SE (most affected) of 70 to 30 ETDRS letters (equivalent to 20/40 to 20/250 on the Snellen chart) Exclusion Criteria: * ...

Countries:United StatesCanada
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Frequently asked questions about foselutoclax

What is foselutoclax used for?

Foselutoclax is being developed for diabetic macular edema, a retinal condition involving fluid accumulation in the macula of people with diabetes. It is an investigational small molecule given by intravitreal injection into the eye. It has not been approved for any use and remains in clinical development.

Who is developing foselutoclax?

Foselutoclax is being developed by Unity Biotechnology, Inc., which trades on the Nasdaq under the ticker UBX. The company is the sponsor of the clinical program evaluating the drug in diabetic macular edema.

What phase is foselutoclax in?

Foselutoclax is in Phase 2 clinical development for diabetic macular edema. It is an investigational therapy and is not FDA approved. The Phase 2 ASPIRE study has been completed, and no trials are currently listed as active.

What clinical trial has studied foselutoclax?

The Phase 2 ASPIRE trial, registered as NCT06011798, evaluated repeat intravitreal injections of foselutoclax in patients with diabetic macular edema. The study enrolled 52 participants in the United States, was randomized, double blind, and used an active control. It is listed as completed.

Is foselutoclax the same as UBX1325?

Yes, foselutoclax is also known as UBX1325. Both names refer to the same investigational small molecule being developed by Unity Biotechnology for diabetic macular edema. The Phase 2 ASPIRE trial is registered under the UBX1325 designation.