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Safety and Efficacy Trial of AAV Gene Therapy in Patients With CNGB3 Achromatopsia

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ClinicalTrials.gov Identifier: NCT02599922
Recruitment Status : Recruiting
First Posted : November 9, 2015
Last Update Posted : January 10, 2019
Sponsor:
Collaborator:
National Eye Institute (NEI)
Information provided by (Responsible Party):
Applied Genetic Technologies Corp

Study Description
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Brief Summary:
This will be a non-randomized, open-label, Phase 1/2 study of the safety and efficacy of rAAV2tYF-PR1.7-hCNGB3 administered to one eye by subretinal injection in individuals with achromatopsia caused by mutations in the CNGB3 gene. The primary study endpoint will be safety and the secondary study endpoint will be efficacy.

Condition or disease Intervention/treatment Phase
Achromatopsia Biological: rAAV2tYF-PR1.7-hCNGB3 Phase 1 Phase 2

Detailed Description:

This will be a non-randomized, open-label, Phase 1/2 study of the safety and efficacy of rAAV2tYF-PR1.7-hCNGB3 administered to one eye by subretinal injection in individuals with achromatopsia caused by mutations in the CNGB3 gene. The primary study endpoint will be safety and the secondary study endpoint will be efficacy.

Subjects will be enrolled sequentially in four groups. Subjects in Groups 1, 2 and 3 will be at least 18 years of age and will receive a lower, middle or higher dose of study agent. Subjects in Group 4 will be at least 6 years of age and will receive the maximum tolerated dose identified in Groups 1, 2 and 3.

Safety will be monitored by evaluation of ocular and non ocular adverse events and hematology and clinical chemistry parameters. Efficacy parameters will include visual acuity, light discomfort testing, color vision, static visual field, ERG, adaptive optics retinal imaging and OCT.


Study Design
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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 24 participants
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Multiple-Site, Phase 1/2, Safety and Efficacy Trial of a Recombinant Adeno-associated Virus Vector Expressing CNGB3 (rAAV2tYF-PR1.7-hCNGB3) in Patients With Congenital Achromatopsia Caused by Mutations in the CNGB3 Gene
Study Start Date : February 2016
Estimated Primary Completion Date : June 2020
Estimated Study Completion Date : June 2024

Resource links provided by the National Library of Medicine


Arms and Interventions
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Arm Intervention/treatment
Experimental: Lower dose
rAAV2tYF-PR1/7-hCNGB3 will be administered at the lowest of three planned dose levels.
 Biological: rAAV2tYF-PR1.7-hCNGB3
rAAV2tYF-PR1.7-hCNGB3 is a non-replicating, rep/cap-deleted, recombinant adeno-associated virus vector that expresses the CNGB3 gene.
Experimental: Middle dose
rAAV2tYF-PR1/7-hCNGB3 will be administered at the middle of three planned dose levels.
 Biological: rAAV2tYF-PR1.7-hCNGB3
rAAV2tYF-PR1.7-hCNGB3 is a non-replicating, rep/cap-deleted, recombinant adeno-associated virus vector that expresses the CNGB3 gene.
Experimental: Higher dose
rAAV2tYF-PR1/7-hCNGB3 will be administered at the highest of three planned dose levels.
 Biological: rAAV2tYF-PR1.7-hCNGB3
rAAV2tYF-PR1.7-hCNGB3 is a non-replicating, rep/cap-deleted, recombinant adeno-associated virus vector that expresses the CNGB3 gene.
Experimental: Maximum tolerated dose
rAAV2tYF-PR1/7-hCNGB3 will be administered at the maximum tolerated dose identified from Groups 1, 2 and 3.
 Biological: rAAV2tYF-PR1.7-hCNGB3
rAAV2tYF-PR1.7-hCNGB3 is a non-replicating, rep/cap-deleted, recombinant adeno-associated virus vector that expresses the CNGB3 gene.


Outcome Measures
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Primary Outcome Measures :
  1. Adverse events [ Time Frame: 1 year ]
    Proportion of participants experiencing grade 3 or greater adverse events


Secondary Outcome Measures :
  1. Visual acuity [ Time Frame: 1 year ]
    Changes in best corrected visual acuity compared to pre-treatment

  2. Light aversion [ Time Frame: 1 year ]
    Changes in light discomfort testing compared to pre-treatment

  3. Color vision [ Time Frame: 1 year ]
    Changes in color vision testing compared to pre-treatment


Eligibility Criteria
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Information from the National Library of Medicine

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Ages Eligible for Study:   6 Years and older   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria include:

  1. Retinal disease consistent with a diagnosis of achromatopsia and documented mutations in both alleles of the CNGB3 gene;
  2. At least 18 years of age for Groups 1, 2 and 3 and at least 6 years of age for Group 4;
  3. Able to perform tests of visual and retinal function;
  4. Visual acuity in the study eye not better than 55 ETDRS letters (Snellen equivalent 20/80) based on the average of two examinations at the baseline visit;
  5. Acceptable laboratory parameters;
  6. For females of childbearing potential: A negative pregnancy test within 2 days before administration of study agent.

Exclusion Criteria include:

  1. Refractive error of ≥ -8.00 diopters (spherical equivalent) of myopia in the study eye;
  2. Evidence of degenerative myopia regardless of the refractive error in the study eye;
  3. Pre-existing eye conditions that would contribute to vision loss in either eye or increase the risk of subretinal injection in the study eye.
Contacts and Locations
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Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02599922


Contacts
Contact: Jill Dolgin, PharmD advocacy@agtc.com

Locations
United States, Florida
VitreoRetinal Associates Recruiting
Gainesville, Florida, United States, 32607
Bascom Palmer Eye Institute Recruiting
Miami, Florida, United States, 33136
United States, Illinois
Pangere Center for Inherited Retinal Diseases, The Chicago Lighthouse for People Who Are Blind or Visually Imp Recruiting
Chicago, Illinois, United States, 60608
United States, Oregon
Casey Eye Institute, Oregon Health and Sciences University Recruiting
Portland, Oregon, United States, 97239
United States, Wisconsin
Medical College of Wisconsin Active, not recruiting
Milwaukee, Wisconsin, United States, 53226
Sponsors and Collaborators
Applied Genetic Technologies Corp
National Eye Institute (NEI)
Investigators
Study Director: Matt Feinsod, MD Applied Genetics Technologies Corporation
More Information
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Additional Information:
Sponsor website  This link exits the ClinicalTrials.gov site

Publications:

Responsible Party: Applied Genetic Technologies Corp
ClinicalTrials.gov Identifier: NCT02599922     History of Changes
Other Study ID Numbers: AGTC_CNGB3-001
R24EY022023 ( U.S. NIH Grant/Contract )
First Posted: November 9, 2015    Key Record Dates
Last Update Posted: January 10, 2019
Last Verified: January 2019

Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No

Additional relevant MeSH terms:
Color Vision Defects
Vision Disorders
Sensation Disorders
Neurologic Manifestations
 Nervous System Diseases
Eye Diseases
Signs and Symptoms