Gyrate Atrophy Ocular and Systemic Study

Running, not enrolling

Conditions studied: Gyrate Atrophy, Gyrata of Choroid and Retina; Atrophy, Ornithine-δ-aminotransferase, OAT, Chorioretinal Degeneration

In brief

The Gyrate Atrophy Ocular and Systemic Study characterizes the natural history of ornithine levels and retinal degeneration (RD) associated with disease-causing OAT variants in the presence of standard care dietary treatment regimens over 4 years. The research goal is to understand the impact of OAT mutations on plasma ornithine levels and retinal degeneration. Funding Source- FDA OOPD

Key facts

Study ID

NCT05312736

Run by

Jaeb Center for Health Research

People needed

46

Starts

2023-11-21

Expected to finish

2028-12-31

Last updated by the study team

2026-01-26

Who can join

Age: 12 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Participants must meet all the following inclusion criteria at the Screening Visit in order to be eligible to enroll into the genetic screening phase.
• Willing to participate in the study and able to communicate consent during the consent process.
• Willing and able to complete all study visit assessments at each visit over the forty-eight (48) month study period. Age ≥ 12 years.
• Must meet one (1) of the Genetic Screening Criteria below:
• At least 2 disease-causing variants in the OAT gene which are homozygous or heterozygous in trans, based on a report from a clinically certified lab, or a report from a research lab that has been pre-approved by the study Genetics Committee.
• At least 2 disease-causing variants in the OAT gene with unknown phase, based on a report from a clinically certified lab, or a report from a research lab that has been pre-approved by the study Genetics Committee, AND must meet both of the following phenotype criteria: .Classic fundus appearance of gyrate atrophy (based on investigator discretion) AND Elevated ornithine levels >300 μmol/L (documented on any prior lab report).
• Note: if a participant has a variant(s) of unknown significance, they will still qualify if they meet the Genetic Screening Criteria above. Ocular Inclusion Criteria Participant must meet the following criteria at the Screening Visit to enroll into the genetic screening phase.
• Both eyes must have a clinical diagnosis of retinal dystrophy. Both eyes must permit good quality photographic imaging (e.g., but not limited to, clear ocular media, adequate pupil dilation, stable fixation).

You may not qualify if…

• Participants must not meet any of the following exclusion criteria at the Screening Visit in order to be eligible to enroll into the genetic screening phase.
• Single pathogenic or likely pathogenic genetic variants known to be associated with autosomal dominant retinitis pigmentosa/retinal dystrophy (AD, heterozygous), X-374 linked retinitis pigmentosa/retinal dystrophy (XL, hemizygous), or mitochondrial inheritance.
• Expected to enter experimental treatment trial at any time during this study. History of more than 1 year of cumulative treatment, at any time, with an agent associated with pigmentary retinopathy, including hydroxychloroquine, chloroquine, thioridazine, and deferoxamine. Note: Since this is a Natural History Study collecting data on the progression of Gyrate Atrophy, pregnant women will not be specifically excluded from participation.
• Ocular Exclusion Criteria:
• If either eye has any of the following ocular exclusion criteria at the Screening Visit, then the participant is not eligible to enroll into the genetic screening phase.
• Current vitreous hemorrhage.
• Current or any history of tractional or rhegmatogenous retinal detachment.
• Current or any history of (for example, but not limited to prior to cataract or refractive surgery) spherical equivalent of the refractive error worse than -8 Diopters of myopia. • • • History of intraocular surgery (for example, but not limited to cataract surgery, vitrectomy, penetrating keratoplasty, or LASIK) within the last 3 months.
• Current or any history of confirmed diagnosis of glaucoma (for example, but not limited to glaucomatous VF changes or nerve changes, or history of glaucoma filtering surgery). e. Current or any history of retinal vascular occlusion or proliferative diabetic retinopathy.
• History or current evidence of ocular disease that, in the opinion of the investigator, may confound assessment of visual function.
• The following medications and treatments are prohibited as they can affect progression of retinal pigmentosa. The participant must not have received or planning to receive the following treatments.
• Any use of ocular stem cell or gene therapy.
• Any treatment with ocriplasmin.
• Treatment with Ozurdex (dexamethasone), Iluvien or Yutiq (fluocinolone 404 acetonide) intravitreal implant.
• The following medications and treatments are excluded within the specified timeframe:
• Treatment with an ophthalmic oligonucleotide within the last 9 months (last treatment date is less than 9 months prior to Screening Visit date).
• Treatment with any other product within five times the expected half-life of the product (time from last treatment date to Screening Visit date is at least 4115 times the half-life of the given product).
• Treatment that can alter visual acuity between Screening and Baseline (e.g., periorbital injections.)

Where it is running

• University of California San Francisco — San Francisco, California, United States
• Johns Hopkins University, Wilmer Eye Institute — Baltimore, Maryland, United States
• Harvard Univ., Massachusetts Eye and Ear Infirmary — Boston, Massachusetts, United States
• University of Pennsylvania — Philadelphia, Pennsylvania, United States
• INRET Clínica e Centro de Pesquisa — Belo Horizonte, Minas Gerais, Brazil
• University of Toronto, Hospital for Sick Children — Toronto, Ontario, Canada
• Helsinki University Hospital — Helsinki, Finland
• Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, INSERM-DGOS CIC1423 — Paris, France
• University of Tuebingen, Centre for Ophthalmology — Tübingen, Germany
• Vista Vision Eye Clinic — Brescia, Italy
• Moorfields Eye Hospital — London, United Kingdom

Full record on ClinicalTrials.gov

Trial information comes from ClinicalTrials.gov and is refreshed daily. TrialsForMe does not provide medical care and does not run the studies it lists.