Table of contents
- Overview of the clinical research
- Study design and how the trial works
- Who can participate
- What is being measured
- Trial status and size
- Key terms explained
Overview of the clinical research
The available study of SEPOFARSEN is a Phase 3 interventional trial in people with Leber congenital amaurosis (LCA) caused by the c.2991+1655A>G (p.Cys998X) mutation in the CEP290 gene.[1]
The study is designed to evaluate efficacy, safety, and tolerability after 12 months of treatment.[1]
Study design and how the trial works
This trial is described as a double-masked, randomized, placebo-controlled, paired-eye study.[1]
“Double-masked” means that neither the participants nor the study team know right away which treatment each eye receives, and “randomized” means the treatment assignment is done by chance.[1]
The study compares treatment eyes with placebo control eyes, which helps the researchers see whether any change is linked to SEPOFARSEN rather than to chance alone.[1]
The interventions listed are placebo and two intravitreal doses of SEPOFARSEN: 40 µg and 160 µg.[1]
Who can participate
The trial is for subjects with LCA due to the specific CEP290 mutation c.2991+1655A>G (p.Cys998X).[1]
This means the study is focused on a narrow patient group, not on all people with vision loss or all forms of inherited retinal disease.[1]
What is being measured
The primary endpoint is the change from baseline in best-corrected visual acuity (BCVA) based on the Freiburg Acuity and Contrast Test (FrACT) between treatment eyes and placebo control eyes at 12 months.[1]
In simple terms, the study asks whether vision changes after treatment and whether the treated eye performs better than the eye used as a control.[1]
Trial status and size
The study status is listed as Authorised.[1]
The planned enrollment is 35 participants, which shows that this is a small, targeted clinical trial in a rare eye disease.[1]
Key terms explained
Interventional study means the researchers give a treatment and then observe what happens.[1]
Placebo means a comparison treatment without active study drug, used to help understand the true effect of SEPOFARSEN.[1]
Paired-eye study means both eyes are used in the comparison, with one eye receiving treatment and the other acting as a control.[1]
Endpoint means the main result the trial is trying to measure, such as a change in vision.[1]



