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Not recruiting
Phase 3

Elamipretide

Sponsor:

Stealth BioTherapeutics Inc.

Code:

NCT06373731

Conditions

Age Related Macular Degeneration (ARMD)

Eligibility Criteria

Sex: All

Age: 55+

Healthy Volunteers: Not accepted

Interventions

Elamipretide

Placebo

Study Details

Brief summary:

The goal of this clinical trial is to evaluate the efficacy, safety and pharmacokinetics of elamipretide in subjects with dry age-related macular degeneration (AMD). The main questions it aims to answer are: what is the rate of change in the macular area of photoreceptor loss in subjects who receive a daily dose of elamipretide compared with those who receive a look-alike substance that contains no active drug, and what is the safety and tolerability of elamipretide daily subcutaneous injections. Participants will receive either once daily subcutaneous doses of 40mg elamipretide or placebo and the two treatment groups will be compared.

Conditions

Age Related Macular Degeneration (ARMD)

Study ID

NCT06373731

Start date

May 30, 2024

Status verified date

Jun, 2025

Completion date

Aug, 2027

Anticipated

Primary completion date

Aug, 2026

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 55+

Healthy Volunteers: Not accepted

Inclusion Criteria:

A subject must meet all the inclusion criteria at the Screening and Baseline Visit (unless otherwise specified) to be eligible for inclusion in the trial.

1. Adults ≥ 55 years of age with at least 1 eye with dry AMD with photoreceptor loss, as determined at the Screening Visit by the presence of extrafoveal geographic atrophy (GA), as determined by the Reading Center primarily by fundus autofluorescence (FAF). For this trial, extrafoveal GA is defined as:

1. well-demarcated area(s) of GA
2. All GA lesions must be at least 150 μm from foveal center Note: The fellow eye may have any of the following: no AMD, AMD without GA, AMD with GA, CNV AMD, or foveal GA (ongoing treatment with anti-angiogenic therapies and/or complement inhibitor therapies in the fellow eye is allowable)

Ocular conditions - Study Eye:
2. GA in the study eye at the Screening Visit may be multi-focal, but the cumulative GA lesion and size (by FAF, as determined by the Reading Center) must:

1. be ≥ 0.50 mm2 and ≤ 10.16 mm2 AND
2. reside completely within the FAF 30- or 35-degree image
3. BCVA by Early Treatment Diabetic Retinopathy Study (ETDRS) score of ≥ 55 letters in the study eye
4. LL BCVA by ETDRS score of ≥ 10 letters in the study eye
5. LLD (defined as the difference between BCVA and LL BCVA) of > 5 letters in the study eye
6. Sufficiently clear ocular media, adequate pupillary dilation, fixation to permit quality fundus imaging, and ability to cooperate sufficiently for adequate ophthalmic visual function testing and anatomic assessment in the study eye

Systemic and General Criteria:
7. Able to administer IMP or have an appropriate designee who can administer the IMP (i.e., a capable family member or a caregiver)
8. Able to provide informed consent and willing to comply with all site visits, examinations, daily IMP administrations and dosing diary entries, and other conditions of the trial protocol
9. Women of childbearing potential must agree to use 1 of the following methods of contraception from the date they sign the ICF until 28 days after the last dose of IMP:

1. Abstinence, when it is in line with the preferred and usual lifestyle of the subject; Subject agrees to use a highly effective method of contraception should they become sexually active
2. Relationships with male partners who have been surgically sterilized by vasectomy (the vasectomy procedure must have been conducted at least 60 days prior to the Screening Visit)
3. Barrier method (e.g., condom or occlusive cap) with spermicidal foam/gel/film/cream AND either hormonal contraception (oral, implanted, or injectable) or an intrauterine device or system Note: Non-childbearing potential is defined as surgical sterilization (e.g., bilateral oophorectomy, hysterectomy, or tubal ligation) or postmenopausal (defined as permanent cessation of menstruation for at least 12 consecutive months prior to the Screening Visit).
10. Male subjects with female partners of childbearing potential must be willing to use a highly effective method of contraception (e.g., abstinence, dual method of contraception) from the date they sign the ICF until 28 days after the last dose of IMP

Exclusion Criteria:

Subjects who meet any of the following criteria at the Screening and Baseline Visit (unless otherwise specified) will be excluded from the trial:

Ocular Conditions - Study Eye:

1. The absence of observable hyper-FAF at the margins of the GA in the study eye at the Screening Visit by the Reading Center
2. Atrophic retinal disease of causality other than AMD including myopia-related maculopathy and monogenetic macular dystrophies including pattern dystrophy and adult-onset Stargardt disease in the study eye
3. Evidence of exudative AMD or CNV in the study eye by history or FA , as determined by the Reading Center
4. Presence of retinal vein occlusion in the study eye
5. Presence of vitreous hemorrhage in the study eye
6. History of retinal detachment in the study eye
7. History of macular hole (stages 2 to 4) in the study eye
8. Presence of an epiretinal membrane and/or vitreomacular traction in the study eye that causes distortion of the retinal contour
9. Presence of any retinal pathology in the study eye that prohibits outer retinal quantification and EZ mapping, as determined at the Screening Visit by the Reading Center
10. At the Screening Visit, advanced glaucoma resulting in a cup to disc ratio of > 0.8 in the study eye
11. History of glaucoma filtration surgery or uncontrolled glaucoma at Baseline Visit in the opinion of the Investigator OR currently using ≥ 3 medications (Minimally invasive glaucoma surgeries (e.g., MIGS) are allowable) Note: Combination medications count as 2 medications.
12. Presence of visually significant cataract OR presence of significant posterior capsular opacity in the setting of pseudophakia Note: Significant cataract is defined as ≥ +3 nuclear sclerosis based upon the scale below or any Posterior Subcapsular Cataract in the study eye. The Sponsor, or its designee, will supply the clinical trial sites with a copy of the standard photographs. Grade Description

  • 1 Opacity is absent
  • 2 Opacity is present, but less than Nuclear Standard Photograph #2
  • 3 Opacity is present, and as severe as or worse than Nuclear Standard Photograph #2 Source: (Chew 2010)
13. Presence of significant keratopathy or any other media or corneal opacity that would cause scattering of light or alter visual function, especially in LL conditions in the study eye
14. Ocular incisional or laser surgery (including cataract surgery) in the study eye within 90 days before the Baseline Visit
15. YAG laser capsulotomy in the study eye within 30 days before the Baseline Visit
16. Aphakia in the study eye
17. History of vitrectomy surgery, submacular surgery, or any vitreoretinal surgery in the study eye
18. Prior treatment with Visudyne® (verteporfin) ocular photodynamic therapy, external-beam radiation therapy (for intraocular conditions), or transpupillary thermotherapy in the study eye
19. History of subthreshold laser treatment or other forms of photobiomodulation for AMD in the study eye
20. Intravitreal drug delivery in the past 60 days or 5-half-lives from the Baseline Visit of the injected drug whichever is longer (e.g., intravitreal corticosteroid injection, anti-angiogenic drugs, or device implantation) in the study eye
21. Intravitreal drug delivery of a complement inhibitor in the past 6 months from the Baseline Visit in the study eye
22. Concurrent disease in the study eye that could require medical or surgical intervention during the trial

Ocular conditions - Either Eye:
23. Presence or a history of diabetic retinopathy in either eye (a history of diabetes mellitus without retinopathy is not a criterion for exclusion)
24. History of herpetic infection in either eye
25. Active uveitis and/or vitritis (grade trace or above) in either eye
26. History of idiopathic or autoimmune-associated uveitis in either eye
27. Active infectious conjunctivitis, keratitis, scleritis, or endophthalmitis in either eye

Systemic Conditions:
28. Has a history of a systemic eosinophilic illness and/or an eosinophil count >1,000 cells x106/L (equivalent to >1 cell x 103/μL) at the Screening Visit
29. History of solid organ transplant
30. Any disease or medical condition that in the opinion of the Investigator would prevent the subject from successfully participating in the trial or might confound trial results
31. Current use of medications known to be toxic to the lens, retina, or optic nerve (e.g., deferoxamine, chloroquine/hydroxychloroquine \[Plaquenil®\], tamoxifen, phenothiazines, ethambutol, digoxin, and aminoglycosides)
32. eGFR of < 30 mL/min at the Screening Visit (using the CKD-EPI 2021 formula)

General Conditions:
33. Participation in other investigational drug or device clinical trials within 30 days or 5 half-lives (whichever is longer) of Screening; or is currently enrolled in a non-interventional clinical trial that, in the opinion of the Investigator, may be potentially confounding to the results of the current trial
34. Women who are pregnant, planning to become pregnant, or breastfeeding/lactating
35. History of allergy to fluorescein that is not amenable to treatment
36. Inability to comply with trial or follow-up procedures
37. Inability to obtain CFP, FAF, and FA of sufficient quality to be analyzed and interpreted
38. Active malignancy or any other cancer from which the subject has been cancer-free for < 2 years. Localized squamous or non-invasive basal cell skin carcinomas are allowed, if appropriately treated prior to screening
39. History of allergic reaction to the investigational drug or any of its components
40. Prior participation in any elamipretide trial

Study Design

Enrollment

360 participants

Anticipated

Allocation

Randomized

Intervention Model

Parallel Assignment

Primary purpose

Treatment

Interventions and Outcome Measures

Arms

experimental: Elamipretide

Subjects will receive once daily subcutaneous doses of 40mg elamipretide for 96 weeks

placebo comparator: Placebo

Subjects will receive once daily subcutaneous doses of placebo for 96 weeks

Interventions

Elamipretide

Subjects will receive once daily SC doses of 40 mg elamipretide for 96 weeks

Placebo

Subjects will receive once daily SC doses of Placebo 96 weeks

Primary outcome measure

  • Week 48 Rate of change in the macular area of photoreceptor loss [ Time Frame: Baseline, Week 48 ]

Central Contacts and Locations

Central contacts

Locations

Associated Retina Consultants

Recruiting

Phoenix, Arizona, United States, 85020

Contacts

Retina Associates of Southern California

Recruiting

Huntington Beach, California, United States, 92607

Contacts

Retina Consultants of San Diego

Recruiting

Poway, California, United States, 92064

Contacts

Retinal Consultants Medical Group

Recruiting

Sacramento, California, United States, 95825

Contacts

Orange County Retinal Medical Group

Recruiting

Santa Ana, California, United States, 92705

Contacts

Bay Area Retina Associates

Recruiting

Walnut Creek, California, United States, 94598

Contacts

Retina Consultants of Southern Colorado

Recruiting

Colorado Springs, Colorado, United States, 80909

Contacts

Connecticut Eye Consultants, P.C.

Recruiting

Danbury, Connecticut, United States, 06810

Contacts

Vitreo Retinal Associates

Recruiting

Gainesville, Florida, United States, 32607

Contacts

Florida Retina Institute

Recruiting

Orlando, Florida, United States, 32806

Contacts

Retina Vitreous Associates of Florida

Recruiting

St. Petersburg, Florida, United States, 33711

Contacts

University Retina and Macula Associates

Recruiting

Oak Forest, Illinois, United States, 60452

Contacts

Associated Vitreoretinal and Uveitis Consultants

Recruiting

Carmel, Indiana, United States, 46290

Contacts

Mid Atlantic Retina Specialist

Recruiting

Hagerstown, Maryland, United States, 21740

Contacts

Ophthalmic Consultants of Boston

Recruiting

Boston, Massachusetts, United States, 02114

Contacts

Kellogg Eye Center

Recruiting

Ann Arbor, Michigan, United States, 48105

Contacts

Retina Consultants of Minnesota

Recruiting

Minneapolis, Minnesota, United States, 55435

Contacts

Mid Atlantic Retina

Recruiting

Cherry Hill, New Jersey, United States, 08034

Contacts

NJ Retina

Recruiting

Teaneck, New Jersey, United States, 07666

Contacts

Retina Vitreous Center

Recruiting

Edmond, Oklahoma, United States, 73013

Contacts

Retina Northwest, PC

Recruiting

Portland, Oregon, United States, 97221

Contacts

Retina Research Institute of Texas

Recruiting

Abilene, Texas, United States, 79606

Contacts

Austin Clinical Research, LLC

Recruiting

Austin, Texas, United States, 78750

Contacts

Retina Consultants of Texas

Recruiting

Bellaire, Texas, United States, 77401

Contacts

Valley Retina Institute

Recruiting

McAllen, Texas, United States, 78503

Contacts

Texas Retina Associates of Plano

Recruiting

Plano, Texas, United States, 75075

Contacts

Medical Center Ophthalmology Associates

Recruiting

San Antonio, Texas, United States, 78240

Contacts

Retina Consultants of Texas

Recruiting

The Woodlands, Texas, United States, 77384

Contacts

Emerson Clinical Research Institute

Recruiting

Falls Church, Virginia, United States, 22042

Contacts

Wagner Kapoor Research Institute

Recruiting

Norfolk, Virginia, United States, 23502

Contacts

Pacific Northwest Retina, PLLC

Recruiting

Silverdale, Washington, United States, 98383

Contacts

More Information

Sponsor

Stealth BioTherapeutics Inc.

Last update posted

Jun 6, 2025

Last verified

Jun, 2025

Keywords

  • dAMD, Dry AMD, dryAMD
  • Macular degeneration
  • non-central geographic atrophy, GA
  • MTP-131
  • elamipretide
  • Non- Intravitreal, Non- gene therapy

Trial information was received from ClinicalTrials.gov and was last updated on 2026-10-05. This information was provided to ClinicalTrials.gov by Stealth BioTherapeutics Inc. on 2025-06-06. Recruitment status is synced daily from ClinicalTrials.gov and may not reflect the sponsor's current status. Confirm during your call.