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OPGx-BEST1

Phase 1

ARB | Gene therapy | Rare Disease |Opus Genetics, Inc.|Trials Updated: Sep 24, 2026

OPGx-BEST1 development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since Sep 2025

OPGx-BEST1 target and mechanism

Molecular targetBEST1
ModalityGene therapy

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDDMC
Total Trials1
Total Enrollment10

FDA Designations

No designations recorded

OPGx-BEST1 clinical trials

OPGx-BEST1 · 1 trial · 4 indications

Phase 1 1
NCT07185256Safety and Tolerability of Subretinally Injected OPGx-BEST1 in Patients With Best Vitelliform Macular Dystrophy (BVMD) or Autosomal-Recessive Bestrophinopathy (ARB)ARB
RECRUITING10 Analytics
PHASE1RECRUITING
Safety and Tolerability of Subretinally Injected OPGx-BEST1 in Patients With Best Vitelliform Macular Dystrophy (BVMD) or Autosomal-Recessive Bestrophinopathy (ARB)
ARBUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of dose-limiting toxicity (DLT) events at the dose tested
5 years

Number of dose-limiting toxicity (DLT) events, defined as any ≥Grade 3 toxicity that occurs within 90 days after IMP administration based on the National Cancer Institute common toxicity criteria

Number and severity of procedure-related adverse events
5 years

Number and severity of adverse events related to the administration of OPGx-BEST1 involving pars plana vitrectomy and subretinal injection under general anesthesia

Number and severity of adverse events related to OPGx-BEST1
5 years

Number and severity of adverse events considered related to the study drug, OPGx-BEST1

Secondary Endpoints

Changes from baseline in retinal morphology assessed by spectral-domain optical coherence tomography
5 years
Changes from baseline in retinal morphology assessed by 55 degree fundus autofluorescence (FAF)
5 years
Changes from baseline in retinal morphology assessed by ultra-wide angle autofluorescence (FAF)
5 years
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
OPGx-BEST1EXPERIMENTALOPGx-BEST1, 1.5E9 vg/eye injected one time subretinally

Interventions

NameTypeDescription
OPGx-BEST1GENETICExperimental Genetic Therapy
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites5

Inclusion Criteria: Individuals who meet all the following criteria will be eligible to participate in the study: 1. Provide informed consent to study assessments. 2. Able and willing to comply with all study assessments for the duration of the study. 3. ≥18 years old. 4. ETDRS BCVA measured with ...

Countries:United States
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Recent Changes (Last 90 Days)

LOWSep 24, 2026NCT07185256lastUpdatePostDate: changed
LOWSep 24, 2026NCT07185256lastUpdatePostDate: changed

Frequently asked questions about OPGx-BEST1

What is OPGx-BEST1 used for?

OPGx-BEST1 is an investigational gene therapy being developed for autosomal-recessive bestrophinopathy (ARB), a rare inherited retinal disease. It is also being studied in patients with Best vitelliform macular dystrophy (BVMD) and autosomal-dominant bestrophinopathy. The drug is administered by subretinal injection.

What does OPGx-BEST1 target?

OPGx-BEST1 targets the BEST1 gene. It is designed to deliver a functional copy of the BEST1 gene to retinal cells to address the underlying genetic cause of BEST1-related retinal diseases, including autosomal-recessive bestrophinopathy (ARB).

Who makes OPGx-BEST1?

OPGx-BEST1 is being developed by Opus Genetics, Inc., a biopharmaceutical company. Opus Genetics trades on the stock market under the ticker symbol IRD.

What phase is OPGx-BEST1 in?

OPGx-BEST1 is in Phase 1 clinical development. It is an investigational drug and has not been approved by the FDA. The drug is currently being evaluated in an early-stage clinical trial to assess its safety and tolerability.

What clinical trials is OPGx-BEST1 in?

OPGx-BEST1 is being studied in a Phase 1 clinical trial with the identifier NCT07185256. This trial is recruiting participants in the United States and is evaluating the safety and tolerability of subretinally injected OPGx-BEST1 in patients with Best vitelliform macular dystrophy (BVMD) or autosomal-recessive bestrophinopathy (ARB). The trial plans to enroll 10 participants aged 18 years and older.

Is OPGx-BEST1 the same as a treatment for BVMD?

OPGx-BEST1 is being studied for use in Best vitelliform macular dystrophy (BVMD) as well as autosomal-recessive bestrophinopathy (ARB). The ongoing Phase 1 clinical trial includes patients with either condition, so OPGx-BEST1 is intended to address both BEST1-related retinal diseases.