Clinical trial Recruiting at 17 sites Phase 3 Interventional Ages 6 and up

Sepofarsen injections for LCA10 due to the CEP290 p.Cys998X mutation

Official title: A Double-Masked, Randomized, Placebo-Controlled, Paired-Eye Study to Evaluate the Efficacy, Safety and Tolerability of Sepofarsen in Subjects With Leber Congenital Amaurosis (LCA) Due to the c.2991+1655A>G (p.Cys998X) Mutation in the CEP290 Gene

Run by Laboratoires Thea · NCT06891443 · Data updated 2026-11-12

This study will test whether sepofarsen eye injections can improve vision in children and adults with LCA10 caused by the CEP290 c.2991+1655A>G (p.Cys998X) mutation.

More Retinal Disease trials

Quick facts

PhasePhase 3
Study typeInterventional
Ages6 Years and up
SexAll
Enrollment32 (estimated)
SponsorLaboratoires Thea
Industry-sponsored
Locations18 sites (San Francisco, California and 17 other locations)
StatusRecruiting
StartedJune 4, 2025
Main results expectedNovember 2027
Study endsOctober 2028
Registry record updatedOctober 21, 2026
Trial IDNCT06891443 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are people aged 6 or older with a confirmed homozygous or compound heterozygous c.2991+1655A>G (p.Cys998X) CEP290 mutation, BCVA within the study's eligible range, symmetrical disease between eyes, and detectable macular ONL.

Probably not a fit

People with pathogenic mutations in other inherited retinal disease genes, unrelated ocular conditions that prevent valid eye-to-eye comparison, absent macular ONL, or unstable macular edema are unlikely to receive benefit from this treatment.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a double-masked, randomized, placebo-controlled paired-eye Phase 3 study in which one eye of each participant is randomized to receive sepofarsen and the other eye receives placebo during the first year. Treatment is given by intravitreal injection every six months, with the sepofarsen-treated eye continuing treatment in year two and the originally placebo-treated eye either continuing placebo or switching to sepofarsen. The trial enrolls participants aged 6 years and older with genetically confirmed homozygous or compound heterozygous CEP290 c.2991+1655A>G (p.Cys998X) mutations and detectable macular outer nuclear layer on OCT. Key outcomes include visual acuity and objective/functional vision measures comparing treated and control eyes.

Why it matters

Potential benefit: If successful, sepofarsen could improve or stabilize vision for people with LCA10 caused by the CEP290 p.Cys998X mutation.

How similar studies have gone: Earlier phase 1/2 studies of sepofarsen (QR-110) reported vision improvements in some LCA10 patients, which provided the signal for this Phase 3 program.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Confirmed clinical diagnosis of LCA10 and a molecular diagnosis of homozygosity or compound heterozygosity for the c.2991+1655A\>G mutation in CEP290.
2. Adults: \>=18 years / Minors: 6 to \<18 years.
3. BCVA (FrACT) equal to or worse than logMAR +0.4 (approximate Snellen equivalent 20/50) to +2.9 logMAR based on quantifiable, reliable FrACT. LP subjects with documented evidence of prior better vision eligible.
4. Symmetrical disease between the two eyes as defined by a BCVA (FrACT) within 0.2 logMAR at baseline.
5. Detectable ONL in the macular area as determined by the CRC at Screening.

Exclusion Criteria:

1. Mutations in genes other than the CEP290 gene associated with other IRD diseases or syndromes.
2. Presence of any ocular pathology in either eye that may make comparison of the eyes not feasible.
3. Presence of unstable concurrent CME, or subject started on (or changed dose of) topical or systemic carbonic anhydrase inhibitor treatment in the 3 months prior to enrollment. CME is allowed if stable for 3 months (with or without treatment).
4. Presence of any clinically significant lens opacities/cataracts based on the AREDS lens grading scale.
5. Any prior receipt of genetic (RNA or DNA therapy) or stem-cell therapy for ocular or non-ocular disease, including sepofarsen.

Where it's running

  • UCSF Wayne and Gladys Valley Center for Vision
    San Francisco, California, United States
    Recruiting
  • University of Miami - Bascom Palmer Eye Institute
    Miami, Florida, United States
    Recruiting
  • University of Iowa
    Iowa City, Iowa, United States
    Recruiting
  • University of Pennsylvania - Center for Advanced Retinal & Ocular Therapeutics
    Philadelphia, Pennsylvania, United States
    Recruiting
  • Sydney Eye Hospital
    Sydney, New South Wales, Australia
    Recruiting
  • Universitair Ziekenhuis Gent (UZ)
    Ghent, Belgium
    Recruiting
Show 12 more locations
  • INRET Clínica/ Santa Casa de Misericórdia de Belo Horizonte
    Belo Horizonte, Minas Gerais, Brazil
    Recruiting
  • Federal University of São Paulo - Hospital São Paulo (UNIFESP-HSP)
    São Paulo, São Paulo, Brazil
    Recruiting
  • University of Alberta
    Edmonton, Alberta, Canada
    Recruiting
  • The Hospital for Sick Children - SickKids
    Toronto, Ontario, Canada
    Recruiting
  • Centre de maladies rares CHNO des Quinze Vingt
    Paris, France
    Recruiting
  • Justus-Liebig Universität - Department of Ophthalmology
    Giessen, Germany
    Recruiting
  • Klinikum der Ludwig-Maximilian Universität München
    München, Germany
    Recruiting
  • University of Tuebingen - Inst. for Ophthalmic Research
    Tübingen, Germany
    Recruiting
  • Radboud Universitair Medisch Centrum
    Nijmegen, Netherlands
    Recruiting
  • Hospital Sant Joan de Déu (SJD Barcelona Children's Hospital)
    Barcelona, Spain
    Recruiting
  • Moorfields Eye Hospital NHS Foundation Trust
    London, United Kingdom
    Recruiting
  • University of Minnesota Medical School
    Minneapolis, Minnesota, United States
    Withdrawn

Study contacts

Similar studies

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.