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UBX1325

Phase 2

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

UBX1325 development status

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

UBX1325 target and mechanism

ModalitySmall molecule

Also known as foselutoclax

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindSHAM_CONTROLLEDDMC
Total Trials3
Total Enrollment136

FDA Designations

No designations recorded

UBX1325 clinical trials

UBX1325 · 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 UBX1325

What is UBX1325 used for?

UBX1325 is being developed for the treatment of diabetic macular edema, an eye condition in which fluid accumulates in the retina of people with diabetes. It is an investigational small molecule studied in adults with diabetic macular edema, and it has also been evaluated in patients with neovascular age-related macular degeneration.

Who is developing UBX1325?

UBX1325 is being developed by Unity Biotechnology, Inc., which trades on the Nasdaq under the ticker UBX. The company has sponsored the clinical studies of UBX1325 in diabetic macular edema conducted in the United States and Canada.

What phase is UBX1325 in?

UBX1325 has completed a Phase 2 clinical trial in diabetic macular edema and a Phase 1 trial in diabetic macular edema and neovascular age-related macular degeneration. It is an investigational therapy and is not approved by the FDA. No trials of UBX1325 are currently active.

What clinical trials has UBX1325 been studied in?

UBX1325 has been studied in two completed trials. The Phase 2 BEHOLD study, NCT04857996, enrolled 65 patients with diabetic macular edema in the United States and Canada. The Phase 1 study NCT04537884 enrolled 19 patients with diabetic macular edema or neovascular age-related macular degeneration in the United States.

How was UBX1325 studied in its clinical trials?

Both UBX1325 trials were randomized, double-blind, and sham-controlled, with a combined enrollment of 84 patients. The Phase 2 BEHOLD trial enrolled adults aged 18 and older, while the Phase 1 trial enrolled patients aged 50 and older. Both studies are listed as completed.