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

February 27, 2026 updated by: GenSight Biologics

A Phase 1/2a, Open-Label, Non-Randomized, Dose-Escalation Study to Evaluate the Safety and Tolerability of GS030 in Subjects With Retinitis Pigmentosa

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

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

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.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
10

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

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

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

14 years to 71 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

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

  • 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 autoimmune 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.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
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
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)

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
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
Time Frame: Week 52/Year 1
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.
Week 52/Year 1

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Evaluate the treatment effect of GS030 as assessed by visual acuity
Time Frame: Week 52/Year 1
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).
Week 52/Year 1
Evaluate the treatment effect of GS030 as assessed by visual function
Time Frame: Week 52/Year 1
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).
Week 52/Year 1
Evaluate immune response to recombinant adeno associated viral vector, derived from serotype 2 (rAAV2.7m8) and ChR tdT protein.
Time Frame: Week 52/Year 1
Immune response to rAAV2.7m8 and ChR-tdT protein from baseline to week 52
Week 52/Year 1
Evaluate the treatment effect of GS030 as assessed by mobility (door task).
Time Frame: Week 52/Year 1
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).
Week 52/Year 1
Evaluate the treatment effect of GS030 as assessed by mobility (line task).
Time Frame: Week 52/Year 1
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).
Week 52/Year 1
Evaluate the treatment effect of GS030 as assessed by QoL (VFQ25)
Time Frame: Week 52/Year 1
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.
Week 52/Year 1
Evaluate the treatment effect of GS030 as assessed by QoL (SF36)
Time Frame: Week 52/Year 1
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).
Week 52/Year 1

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
GenSight Biologics

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: GenSight Biologics, GenSight Biologics

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
September 26, 2018

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
October 26, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
October 26, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
October 11, 2017

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 25, 2017

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
October 31, 2017

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
March 2, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 27, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
February 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • GS030_CLIN_001
  • 2017-002204-27 (EudraCT Number)

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

Yes

product manufactured in and exported from the U.S.

Yes

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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Clinical Trials on Gene therapy: GS030-DP AND Medical device: GS030-MD

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Sponsors and Collaborators

Medical Conditions

Drug Interventions

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

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