ClinicalTrials.gg
Active, not recruitingNCT03326336PIONEERUpdated Mar 2, 2026

Dose-escalation Study to Evaluate the Safety and Tolerability of GS030 in Subjects With Retinitis Pigmentosa

A Phase 1/2 interventional study of Gene therapy: GS030-DP AND Medical device: GS030-MD in Non-syndromic Retinitis Pigmentosa, sponsored by GenSight Biologics. Active, not recruiting at 3 sites in 3 countries. Open to participants aged 18 Years to 75 Years. Per ClinicalTrials.gov, last updated 2026-03-02.

Primary conditionRetinitis PigmentosaRegistry: Eye DiseasesReclassifiedWhy we changed it
Registry
Eye Diseases — the first condition term the registry derived for this study.
ClinicalTrials.gg
Retinitis Pigmentosa
Why
  1. The study's listed conditions name Retinitis Pigmentosa, a narrower term within Eye Diseases.
Confidence
High: the new condition is named in the study's own listed conditions. Of 351 hand-checked studies reclassified this way, 68% were exactly right and 84% in the right disease family; the registry's first term was right for 5% (measured 2026-10-21). How we classify →
Wrong?
Tell us the study's main condition →

Sponsored by GenSight Biologics · Phase 1/2, Interventional, and Treatment

Phase
Phase 1/2
Study type
Interventional
Enrollment
10
Allocation
Not applicable
Ages
18 Years to 75 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 119 studies in Retinitis Pigmentosa with a site in United States — 20 open to participants now, 44 under way, 6 of them phase 3. Retinitis Pigmentosa · United States.

Enrollment
58th of 78
10 · median 21
Started
2018
with 3 others
Phase 1/2
20 of 119
4 open now
Primary completion
2027-10
later than 22 of 42 live
Registered
57th of 119
by date

Among the 119 studies in Retinitis Pigmentosa with a site in United States, this one is the 58th largest by enrollment of the 78 interventional ones that give a count, is one of 4 that started in 2018, is one of 20 in phase 1/2, reaches primary completion later than 22 of the 42 other live ones, and was the 57th registered.

Retinitis Pigmentosa

278 studies on the registry are indexed under Retinitis Pigmentosa; 72 are open to participants now.

This study's enrollment of 10 is below the median of 27 across 179 interventional studies indexed under Retinitis Pigmentosa.

Browse Retinitis Pigmentosa studies →

Open to participants now

20 of the 119 studies in Retinitis Pigmentosa with a site in United States are open now, in 12 countries. Each count lists the studies.

All 20 open studies →

Who these studies take

Of the 49 Retinitis Pigmentosa studies recruiting now, 37 (76%) set no upper age limit and 7 (14%) stop at 75 or younger; 16 take children under 18; 10 take healthy volunteers.

This study: 18 Years to 75 Years · all sexes · no healthy volunteers.

The full table on the hub →
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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 119 studies in Retinitis Pigmentosa with a site in United States, or all of them as a file.
02

Study summary

The objective of this study is to evaluate the safety and tolerability of escalating doses of a gene therapy called GS030-DP (injected study treatment) administered via a single intravitreal injection and repeated light stimulation using a medical device called GS030-MD (stimulating glasses) in subjects with documented diagnosis of non-syndromic Retinitis Pigmentosa

Read the detailed description

Study GS030_CLIN_001 is a multicenter, Phase 1/2a, open-label, non-randomized, dose-escalation, safety and tolerability study of GS030-DP in association with GS030-MD in subjects with non-syndromic RP that is confirmed by full-field ERG. The study design includes a dose escalation of the vector encoding the ChR-tdT. This first-in-human study design evaluates the safety and tolerability of GS030, the associated GS030-MD and GS030-DP, which is the treatment to be developed and considered for marketing.

03

Conditions studied

  • Non-syndromic Retinitis Pigmentosa

Keywords

  • Eye Diseases
  • Hereditary Eye Diseases
  • Retinal degeneration
  • Inherited retinal diseases
  • Rod & cone dystrophies
  • Retinitis Pigmentosa
  • Gene Therapy
  • Optogenetic
  • Intravitreal Injections
  • AAV Vectors
  • Medical device
  • Visual Interface
04

In context

Retinitis Pigmentosa Reclassified

278 studies on the registry are indexed under Retinitis Pigmentosa; 72 are open to participants now.

This study's enrollment of 10 is below the median of 27 across 179 interventional studies indexed under Retinitis Pigmentosa.

Browse Retinitis Pigmentosa studies →

Lead sponsor

GenSight Biologics is the lead sponsor of 9 studies on the registry; 1 is open to participants now.

Compared within Retinitis Pigmentosa, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Eye Diseases. The counts are of registry records indexed under each term, refreshed daily. How we classify →

05

Who can participate

Ages eligible
18 Years to 75 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Age ≥18 years to ≤75 years at the time of ICF signature.
  • Diagnosis of non-syndromic RP defined as:

    • Clinical diagnosis of non-syndromic RP based on history, mid-peripheral visual dysfunction, and fundoscopic appearance.
    • Diagnosis of non-syndromic RP is confirmed on full-field ERG
  • Visual acuity:

    • Visual acuity in the dose-escalation cohorts of no better LP.
    • Visual acuity in the extension cohort of no better than CF pending review of dose-escalation cohort data by the DSMB.
  • Relatively preserved ganglion cell layer volume and retinal nerve fiber layer thickness, as measured with spectral domain optical coherence tomography (SD-OCT).
  • Interpupillary distance of ≥51 mm and ≤72 mm.
  • Refractive error of the study eye between -6 diopters and +6 diopters.

Exclusion criteria

Exclusion criteria

  • Prior receipt of any gene therapy.
  • Subjects who have undergone significant ocular surgery (per investigator determination) within 3 months prior to Visit 1.
  • Presence of narrow iridocorneal angles contraindicating pupillary dilation.
  • Presence of disorders of the ocular media which interfere with visual acuity and other ocular assessments, including SD-OCT, during the study period.
  • Presence of any systemic or ocular diseases, or pathologies, other than non-syndromic RP, or their associated therapies, that can cause or have the potential to cause vision loss.
  • Prior vitrectomy or vitreomacular surgery.
  • Presence of vitreo-macular adhesion or traction, epiretinal membrane, macular pucker and macular hole, evident by ophthalmoscopy and/or by SD-OCT examinations and assessed by the investigator to significantly affect central vision.
  • Current evidence of retinal detachment assessed by the investigator to significantly affect central vision.
  • Active ocular inflammation or recurrent history of idiopathic or associated uveitis.
  • Presence of an Active Implantable Medical Device.
  • Subjects who have undergone thermal laser procedure to the retina within 3 months of trial entry, or any prior thermal laser procedure to the macular region.
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Autoimmune disease

A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.

Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.

06

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
10 participants (actual)

Study arms

  • Other
    Cohort

    3 dose escalation cohorts (low, medium and high dose) with 3 subjects per cohort followed by an extension cohort at the highest-well tolerated dose with 3 to 9 subjects.

    Combination Product: Gene therapy: GS030-DP AND Medical device: GS030-MD

Interventions

  • Combination productGene therapy: GS030-DP AND Medical device: GS030-MD

    GS030-Drug Product (GS030-DP) - Recombinant adeno-associated viral vector, derived from serotype 2 (rAAV2.7m8), containing the optimized channelrhodopsin ChrimsonR-tdTomato gene under the control of the ubiquitous CAG promoter (rAAV2.7m8-CAG-ChrimsonR-tdTomato) GS030-Medical Device (GS030-MD) - Visual Interface Stimulating Glasses (that amplify the external visual stimulus to the optogenetically engineered retina)

07

What researchers measure

Primary outcomes

  1. The safety and tolerability of escalating doses of GS030-DP administered via a single IVT and repeated light stimulation using GS030-MD in subjects with non-syndromic Retinitis Pigmentosa

    Safety and tolerability of GS030 treatment at Week 52/Year 1, by assessments based on local and systemic safety issues, specifically those related to IVT of GS030-DP and the subsequent repeated use of GS030-MD, as assessed by incidence of Adverse Events.

    Time frame: Week 52/Year 1

Secondary outcomes

  1. Evaluate the treatment effect of GS030 as assessed by visual acuity

    Assessment of the treatment effect with the change from baseline to Week 52 of parameters measured with the Freiburg Visual Acuity \& Contrast Test (FrACT) free computer program that uses graphics capabilities and psychometric methods to provide automated, self-paced measurement and the full field threshold stimulus test (FST) measuring the illuminance necessary to stimulate the most sensitive parts of the retina, and thus determines a quantifiable stimulation threshold (before and after gene transfer, with GS030-MD turned ON and turned OFF).

    Time frame: Week 52/Year 1

  2. Evaluate the treatment effect of GS030 as assessed by visual function

    Assessment of the treatment effect with the change from baseline to Week 52 of parameters measured with Humphrey visual field 10-2 Standardized automated perimetry, square localization test, displaying white square at a random location on a black background and direction of motion test measuring the ability of subjects to determine the direction of an object moving in the visual field (before and after gene transfer, with GS030-MD turned ON and turned OFF).

    Time frame: Week 52/Year 1

  3. Evaluate the treatment effect of GS030 as assessed by mobility (door task).

    Assessment of the treatment effect with the change from baseline to Week 52 of parameters measured with door task (before and after gene transfer, with GS030-MD turned ON and turned OFF).

    Time frame: Week 52/Year 1

  4. Evaluate the treatment effect of GS030 as assessed by mobility (line task).

    Assessment of the treatment effect with the change from baseline to Week 52 of parameters measured with line task (before and after gene transfer, with GS030-MD turned ON and turned OFF).

    Time frame: Week 52/Year 1

  5. Evaluate the treatment effect of GS030 as assessed by QoL (VFQ25)

    Assessment of the treatment effect on quality of life changes from baseline to Week 52 with the Visual Functioning Questionnaire-25 (VFQ-25). VFQ25 is a 25-item questionnaire with 47 questions, each question has several responses scored on a scale from 0 to 5, 0 to 6, or 0 to 10. Values are calculated in percentages.

    Time frame: Week 52/Year 1

  6. Evaluate the treatment effect of GS030 as assessed by QoL (SF36)

    Assessment of the treatment effect on quality of life changes from baseline to Week 52 with the Short Form Survey 36 Version 2 (SF-36v2). The SF-36v2 is a subject-rated 36-item questionnaire assessing subject health. There are 8 scaled scores, which are the weighted sums of the questions in their section. Each scale is directly transformed into a 0 to 100 scale. A lower score indicates more disability, and a higher score indicates less disability (a score of 0 is equivalent to maximum disability, and a score of 100 is equivalent to no disability).

    Time frame: Week 52/Year 1

  7. Evaluate immune response to recombinant adeno associated viral vector, derived from serotype 2 (rAAV2.7m8) and ChR tdT protein.

    Immune response to rAAV2.7m8 and ChR-tdT protein from baseline to week 52

    Time frame: Week 52/Year 1

08

Study locations

3 sites
  • UPMC Eye Center
    Pittsburgh, Pennsylvania 15213, United States
  • Centre Hospitalier National d'Ophtalmologie (CHNP) des Quinze-Vingts
    Paris, 75012, France
  • Moorfields Eye Hospital NHS Foundation Trust, 162 City Road
    London, United Kingdom
09

References and documents

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Sep 2018 (actual). Primary completion is estimated for Oct 2027, 109 months after the start.

Of 28 phase 1/2 interventional studies under Retinitis Pigmentosa, half reached primary completion within 53 months of starting (the median), counting those still running; a quarter within 22 and three quarters within 92. This study's planned 109 months is above that.

How these figures are worked out, and which studies are left out of them.

Registered
Oct 11, 2017
First posted
Oct 31, 2017
StartActual
Sep 26, 2018
Primary completionEst.
Oct 26, 2027
CompletionEst.
Oct 26, 2027
Last update
Mar 2, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Mar 2, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT03326336
Lead sponsor
GenSight Biologics
Responsible party
Sponsor
First posted
Oct 31, 2017
Start date
Sep 26, 2018
Primary completion
Oct 26, 2027 (estimated)
Completion
Oct 26, 2027 (estimated)
Last update
Mar 2, 2026

Study contacts

GenSight Biologics
study director · GenSight Biologics

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is active, not recruiting, as verified in Feb 2026. You cannot join it, but the record below documents what was studied.

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