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Trial details imported from ClinicalTrials.gov

For full trial details, please see the original record at https://clinicaltrials.gov/study/NCT03316300




Registration number
NCT03316300
Ethics application status
Date submitted
3/10/2017
Date registered
20/10/2017
Date last updated
24/09/2024

Titles & IDs
Public title
A Study to Determine the Safety and Efficacy of NT-501 in Macular Telangiectasia Type 2 - Protocol A
Scientific title
A Phase III Multicenter Randomized, Sham Controlled, Study to Determine the Safety and Efficacy of NT-501 in Macular Telangiectasia Type 2
Secondary ID [1] 0 0
NTMT-03-A
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Macular Telangiectasia Type 2 (MacTel) 0 0
Condition category
Condition code
Cardiovascular 0 0 0 0
Diseases of the vasculature and circulation including the lymphatic system
Human Genetics and Inherited Disorders 0 0 0 0
Other human genetics and inherited disorders

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
Other interventions - NT-501
Treatment: Surgery - Sham Procedure

Experimental: NT-501 - Test product

Sham comparator: Sham - A sham surgical procedure was performed to mimic the implant procedure; there was no comparator product.


Other interventions: NT-501
Each NT-501 implant consisted of hCNTF-secreting NTC-201-6A.02 cells encapsulated within supportive matrices and surrounded by a semipermeable polymer membrane.

The NTC-201-6A cells continuously secrete CNTF from the NT-501 implant into the vitreous cavity. Implanted by a qualified Health Care Professional.

Treatment: Surgery: Sham Procedure
The sham surgery involved a superficial conjunctival incision performed under local anesthetic and closure with a single suture.
Intervention code [1] 0 0
Other interventions
Intervention code [2] 0 0
Treatment: Surgery
Comparator / control treatment
Control group

Outcomes
Primary outcome [1] 0 0
The Rate of Change in the Area of EZ Area of Loss From Baseline Through Month 24
Timepoint [1] 0 0
End point timeframe is through Month 24. Baseline, Month 6, 12, 16, 20 and 24. Month 6 was collected but not included in the primary analyses.
Secondary outcome [1] 0 0
Mean Change in Aggregate Retinal Sensitivity Loss and Aggregate Interpolated Retinal Sensitivity Loss by Microperimetry (mITT Population)
Timepoint [1] 0 0
Baseline through 24 months.
Secondary outcome [2] 0 0
Monocular Reading Speed (mITT Population)
Timepoint [2] 0 0
Baseline through 24 months.

Eligibility
Key inclusion criteria
Key

1. Participant must have at least one study eye with a positive diagnosis of MacTel with evidence of fluorescein leakage typical of MacTel and at least one of the other features that include hyperpigmentation that is outside of a 500 micron radius from the center of the fovea, retinal opacification, crystalline deposits, right-angle vessels, or inner/outer lamellar cavities
2. Participant must have an Inner Segment - Outer Segment Junction Line (IS/OS) Photo Receptor (PR) break in the study eye(s) and en face EZ (area of IS/OS loss) as measured by spectral-domain optical coherence tomography (SD-OCT) between 0.16 mm^2 and 2.00 mm^2
3. Participant's best corrected visual acuity (BCVA) is a 54-letter score or better (20/80 or better) as measured by the Early Treatment Diabetic Retinopathy Study (ETDRS) chart at screening.
4. Participant must have steady fixation in the foveal or parafoveal area and sufficiently clear media for good quality photographs
5. Participant must be greater than 21 years of age or less than 80 years of age at screening
6. Participant must be able to provide written informed consent to participate in the study, in accordance with the International Conference on Harmonisation Good Clinical Practices guidelines, and local regulations, before initiating any study-related procedures
7. Women of childbearing potential must agree to use highly effective contraception (Germany and France only)

Key
Minimum age
21 Years
Maximum age
80 Years
Sex
Both males and females
Can healthy volunteers participate?
No
Key exclusion criteria
1. Participant is medically unable to comply with study procedures or follow-up visits
2. Participant received intravitreal steroid therapy for non-neovascular MacTel within the last 3 months
3. Participant has ever received intravitreal anti-vascular endothelial growth factor (VEGF) therapy in the study eye OR has, within the past 3 months, received intravitreal anti-VEGF in the fellow eye at randomization
4. Participant has evidence of ocular disease other than MacTel that, in the judgment of the examining physician, may confound the diagnosis, procedures or outcome of the study (eg, glaucoma, severe nonproliferative or proliferative diabetic retinopathy, uveitis)
5. Participant has a chronic requirement (eg, = 4 weeks at a time) for ocular medications and/or has a diagnosed disease that, in the judgment of the examining physician, may be vision threatening or may affect the primary outcome (artificial tears are permitted)
6. Participant has evidence of intraretinal neovascularization or subretinal neovascularization (SRNV), as evidenced by hemorrhage, hard exudate, subretinal fluid or intraretinal fluid in either eye
7. Participant has evidence of central serous chorio-retinopathy in either eye
8. Participant has evidence of pathologic myopia in either eye
9. Participant has significant corneal or media opacities in either eye
10. Participant has had a vitrectomy, penetrating keratoplasty, trabeculectomy, or trabeculoplasty
11. Participant has any of the following lens opacities: cortical opacity > standard 3, posterior subcapsular opacity > standard 2, or a nuclear opacity > standard 3 as measured on the Age-Related Eye Disease Study (AREDS) clinical lens grading system
12. Participant has undergone lens removal in the previous 3 months or YAG laser within 4 weeks
13. Participant was a participant in any other clinical trial of an intervention (drug or device) within the last 6 months
14. Participant is on chemotherapy
15. Participant is pregnant or breastfeeding
16. Participant has a history of malignancy that would compromise the 24-month study survival
17. Participant with a history of ocular herpes virus in either eye
18. 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
19. Participant has evidence of intraretinal hyperreflectivity by OCT

Study design
Purpose of the study
Treatment
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?
The people receiving the treatment/s

The people assessing the outcomes
Intervention assignment
Parallel
Other design features
Phase
Phase 3
Type of endpoint/s
Statistical methods / analysis

Recruitment
Recruitment status
Completed
Data analysis
Reason for early stopping/withdrawal
Other reasons
Date of first participant enrolment
Anticipated
Actual
24/11/2017
Date of last participant enrolment
Anticipated
Actual
Date of last data collection
Anticipated
Actual
23/09/2022
Sample size
Target
Accrual to date
Final
120
Recruitment in Australia
Recruitment state(s)
WA
Recruitment hospital [1] 0 0
Lions Eye Institute - Perth
Recruitment postcode(s) [1] 0 0
6009 - Perth
Recruitment outside Australia
Country [1] 0 0
United States of America
State/province [1] 0 0
California
Country [2] 0 0
United States of America
State/province [2] 0 0
Colorado
Country [3] 0 0
United States of America
State/province [3] 0 0
Louisiana
Country [4] 0 0
United States of America
State/province [4] 0 0
Maryland
Country [5] 0 0
United States of America
State/province [5] 0 0
Michigan
Country [6] 0 0
United States of America
State/province [6] 0 0
Nevada
Country [7] 0 0
United States of America
State/province [7] 0 0
Ohio
Country [8] 0 0
United States of America
State/province [8] 0 0
Oklahoma
Country [9] 0 0
United States of America
State/province [9] 0 0
Oregon
Country [10] 0 0
United States of America
State/province [10] 0 0
Tennessee
Country [11] 0 0
United States of America
State/province [11] 0 0
Texas
Country [12] 0 0
United States of America
State/province [12] 0 0
Utah
Country [13] 0 0
France
State/province [13] 0 0
Paris
Country [14] 0 0
United Kingdom
State/province [14] 0 0
Oxfordshire
Country [15] 0 0
United Kingdom
State/province [15] 0 0
London

Funding & Sponsors
Primary sponsor type
Commercial sector/industry
Name
Neurotech Pharmaceuticals
Address
Country
Other collaborator category [1] 0 0
Other
Name [1] 0 0
The Lowy Medical Research Institute Limited
Address [1] 0 0
Country [1] 0 0

Ethics approval
Ethics application status

Summary
Brief summary
This study is a phase 3, randomized, multi-center study to evaluate the efficacy and safety of the NT-501 implants in participants with macular telangiectasia type 2.
Trial website
https://clinicaltrials.gov/study/NCT03316300
Trial related presentations / publications
Public notes

Contacts
Principal investigator
Name 0 0
Paul S Bernstein, MD
Address 0 0
University of Utah - John A. Moran Eye Center
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for public queries
Name 0 0
Address 0 0
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for scientific queries



Summary Results

For IPD and results data, please see https://clinicaltrials.gov/study/NCT03316300