A Study of an Encapsulated Cell Technology (ECT) Implant for Patients With Atrophic Macular Degeneration
A Phase II Study of Implants of Encapsulated Human NTC-201 Cells Releasing Ciliary Neurotrophic Factor (CNTF), in Participants With Visual Acuity Impairment Associated With Atrophic Macular Degeneration
  • Phase

    Phase 2
  • Study Type

  • Status

    Completed No Results Posted
  • Intervention/Treatment

    nt-501 ...
  • Study Participants

The purpose of this study is to look at the safety and effectiveness of CNTF implants on vision in participants with atrophic macular degeneration. This research is being done because there are no effective therapies for people with atrophic macular degeneration. Age-related macular degeneration (AMD) is a condition that affects the macula, the central part of the retina that we use for seeing details. There are two types of AMD, one is the wet type in which new blood vessels grow, also known as choroidal neovascularization (CNV), but the other is the dry type in which the healthy cells die, and that is the target of this study. This is called atrophic macular degeneration. The implant is a small capsule that contains human retinal pigment epithelium cells. These cells have been given the ability to make CNTF and release it through the capsule membrane into the surrounding fluid. In this study, two different CNTF dose levels will be used: a high dose and a low dose, as well as a sham surgery (or placebo) group.
The study will involve about 18 visits over 1½ years for specific tests of the participant's vision and health. These visits may include visual exams, blood draw for laboratory testing, brief medical history and exam, and occasionally a questionnaire (survey), in addition to the visits for the surgical procedures. There will be about 8 centers participating in this study, and up to 48 people enrolled, across the US. Each participant joining the study who has completed initial screening will then be scheduled to have a brief surgical procedure performed on one eye, which may or may not include a very small cell-filled implant. Follow-up visits for repeat assessments will be required regularly to determine if the implant being tested is safe and effective for use to treat AMD.
Study Started
Jan 31
Primary Completion
Oct 31
Study Completion
Oct 31
Last Update
Nov 16

Drug NT-501 implant

High Dose

Drug NT-501 implant

Low Dose

Other Sham Procedure

Sham Procedure

1 high dose NT-501 implant Experimental

2 low dose NT-501 implant Experimental

3 sham procedure Sham Comparator

No implant


Study inclusion / exclusion criteria:

Criteria for patients to qualify for the study include, but are not limited to:

Participants must be at least 50 years old
Diagnosis of age-related macular degeneration with the presence of geographic atrophy
Visual acuity no better than 20/63 and no worse than 20/160
History of recent visual acuity loss

The following criteria will exclude patients from the study:

Pregnant or lactating females, or females planning to become pregnant during the study or not using an acceptable method of contraception.
Age-related macular degeneration with new blood vessel growth
Other eye diseases including advanced cataract.
Chronic systemic disease requiring continuous treatment with systemic steroids, immunosuppressive medications or insulin.
No Results Posted