- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04577300
Dual Intravitreal Implantation of NT-501 Encapsulated Cell Therapy for Glaucoma
November 24, 2023 updated by: Jeffrey L Goldberg, Stanford University
A Randomized, Sham Controlled, Masked Phase II Study to Evaluate the Safety and Efficacy of Dual Intravitreal Implantation of NT-501 Encapsulated Cell Therapy for the Treatment of Glaucoma
To determine the safety and efficacy over 24 months of dual NT-501 CNTF encapsulated cell therapy (ECT) on visual impairment related to glaucoma.
Study Overview
Detailed Description
A randomized, sham controlled, masked trial of up to 30 eyes will be recruited into the study.
Participants with a qualifying study eye will be randomized after screening and baseline evaluations to receive 2 NT-501 ECT implants in the study eye (20 eyes), 1 NT-501 ECT implant (5 eyes) or a sham surgery (control arm; 5 eyes).
No explant will be required.
An examination for safety will occur one day and one week following implant and periodically thereafter for 24 months post-implant.
Patients in the control arm may be offered 2 NT-501 ECT implants after the 12-month post-operative follow-up visit.
Study Type
Interventional
Enrollment (Estimated)
30
Phase
- Phase 2
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
- Name: Mariana Nunez, MD
- Phone Number: 6504977846
- Email: mnunez@stanford.edu
Study Locations
-
-
California
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Palo Alto, California, United States, 94303
- Recruiting
- Byers Eye Institute at Stanford University
-
Contact:
- Mariana Nunez
- Phone Number: 650-497-7846
- Email: mnunez@stanford.edu
-
-
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
Ages Eligible for Study
16 years and older (Adult, Older Adult)
Accepts Healthy Volunteers
No
Description
Inclusion Criteria:
- Participant must be medically able to undergo the testing required in the schedule of events (SOE).
- Participant's clinical diagnosis must be consistent with glaucoma characterized by the following features: Mean deviation (MD) of -3 to -20 dB on Humphrey Visual Field 24-2 testing and two visual field tests of adequate quality with a maximum VFI variability of ± 10%
- Residual visual field preservation including best-corrected visual acuity (BCVA) better than 20/200 in either eye.
- Participant's eye pressure must be clinically stable, with IOP <21.
- If a participant has two eyes meeting study criteria, the worse eye as determined by visual field index (VFI) or patient preference, will be deemed includable. If both eyes qualify and have the same VFI, a randomization procedure will assign one eye to the study.
- Participant must understand and sign the informed consent. If the participant's vision is impaired to the point where he/she cannot read the informed consent document, the document will be read to the participant in its entirety.
- Females of childbearing potential must agree to use an effective form of birth control.
- Participant must be determined by the presurgical anesthesia or medical team to be fit for ophthalmic surgery for the NT-501 ECT implant insertion.
Exclusion Criteria:
- Participant is unable to comply with study procedures or followup visits.
- Participant has other optic nerve or retinal degenerative disease causing vision loss, irrespective of whether it is currently treated or untreated.
- Participant is likely to be offered glaucoma surgery in the study eye within 6 months of screening.
- Participant has cataract-associated vision loss to less than 20/40.
- Participant has a history of ocular herpes zoster.
- Participant has a requirement of acyclovir and/or related products during study duration. To be eligible for this study, the participant must discontinue use of these products prior to enrollment and must not continue with the products until after they have completed the study.
- Participant has evidence of corneal opacification or lack of optical clarity.
- Participant has uveitis or other ocular inflammatory disease.
- Participant is receiving systemic steroids or other immunosuppressive medications.
- Participant has diabetic macular edema and/or diabetic retinopathy.
- Participant has myopic degeneration.
- Participant is currently participating in or has within the last 3 months participated in any other clinical trial of a drug by ocular (if in the study eye) or systemic administration.
- Participant is pregnant or lactating.
- Participant is on chemotherapy.
- Participant has a history of malignancy other than basal cell carcinoma, unless it was treated successfully 2 years prior to inclusion in the trial.
- Participant has, in the opinion of the investigator, any physical or mental condition that would increase the risk of participation in the study or may interfere with the study procedures, evaluations and outcome assessments.
- Any intraocular surgery of the study eye within 12 weeks prior to the screening visit
- History of use of drugs with known retinal toxicity, at retinotoxic doses.
- Patient has a history of multiple sclerosis.
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: Randomized
- Interventional Model: Parallel Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Dual Implantation
Two NT-501 devices will be implanted in the study eye.
|
Implant of Neurotech NT-501 device(s)
|
Experimental: Single Implantation
One NT-501 device will be implanted in the study eye.
|
Implant of Neurotech NT-501 device(s)
|
Sham Comparator: Sham Implantation
No NT-501 devices will be implanted in the study eye.
|
Sham implantation
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Visual Field MD at 12 Months
Time Frame: 12 months
|
Change from baseline in visual field through 12 months as assessed by Mean Deviation (MD).
|
12 months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Visual Field Index at 12 months
Time Frame: 12 months
|
Change from baseline in visual field through 12 months as assessed by Visual Field Index (VFI).
|
12 months
|
Visual Field PLR at 12 months
Time Frame: 12 months
|
Change from baseline in visual field pointwise linear regression (PLR) through 12 months.
|
12 months
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Jeffrey L Goldberg, MD, PhD, Stanford University
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)
May 15, 2021
Primary Completion (Estimated)
August 15, 2024
Study Completion (Estimated)
December 15, 2024
Study Registration Dates
First Submitted
September 25, 2020
First Submitted That Met QC Criteria
September 29, 2020
First Posted (Actual)
October 6, 2020
Study Record Updates
Last Update Posted (Actual)
November 28, 2023
Last Update Submitted That Met QC Criteria
November 24, 2023
Last Verified
November 1, 2023
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 56950
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Yes
Studies a U.S. FDA-regulated device product
No
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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