ReNEW:Phase 3 Study of Efficacy, Safety & Pharmacokinetics of Subcutaneous Injections of Elamipretide in Subjects With Dry Age-Related Macular Degeneration (Dry AMD)

Recruitment Status
ACTIVE, NOT RECRUITING
(See Contacts and Locations)Verified October 2025 by Stealth BioTherapeutics Inc.
Sponsor
Stealth BioTherapeutics Inc.
Information Provided by (Responsible Party)
Stealth BioTherapeutics Inc.
Clinicaltrials.gov Identifier
NCT06373731
Other Study ID Numbers:
SPIAM-301
First Submitted
April 15, 2024
First Posted
April 17, 2024
Last Update Posted
November 16, 2025
Last Verified
October 2025

ClinicalTrials.gov processed this data on November 2025. Link to the current ClinicalTrials.gov record .

History of Changes

Study Details

Study Description

The ReNEW (SPIAM-301) trial is a phase 3, randomized, double-masked, parallel-group, placebo-controlled clinical trial to evaluate the efficacy, safety, and pharmacokinetics of a once daily subcutaneous (SC) injection of elamipretide in subjects who have dry AMD. Subjects will be randomized (2:1) to once daily SC doses of 40 mg elamipretide, or placebo for 96 weeks of treatment by a central randomization and stratified by SD-OCT device type (Heidelberg SPECTRALIS®, ZEISS CIRRUS®) and baseline macular area of photoreceptor loss, defined as an ellipsoid zone-retinal pigment epithelium (EZ-RPE) thickness of 0μm assessed by SD-OCT and ellipsoid zone (EZ) mapping (High Strata ≥ 5.1mm2, Low Strata \<5.1mm2).

Primary Objective

* Evaluate the efficacy of once daily subcutaneous (SC) injections of elamipretide in subjects who have dry age-related macular degeneration (AMD) Secondary Objectives

* Evaluate the safety and tolerability of once daily SC injections of elamipretide

* Evaluate the Pharmacokinetic (PK) profile of elamipretide and its metabolites

Condition or DiseaseIntervention/Treatment
Age Related Macular Degeneration (ARMD)
Drug: ElamipretideDrug: Placebo

Study Design

Study TypeInterventional
Actual Enrollment313 participants
Design AllocationRandomized
Interventional ModelParallel Assignment
MaskingQuadruple
Primary PurposeTreatment
Official TitleReNEW: A Phase 3, Double-Masked, Placebo-Controlled Clinical Trial to Evaluate the Efficacy, Safety, and Pharmacokinetics of Subcutaneous Injections of Elamipretide in Subjects Who Have Dry Age-Related Macular Degeneration (Dry AMD)
Study Start DateMay 29, 2024
Actual Primary Completion Date1yr 3mos from now
Actual Study Completion Date1yr 4mos from now

Groups and Cohorts

Group/CohortIntervention/Treatment
Elamipretide
Subjects will receive once daily subcutaneous doses of 40mg elamipretide for 96 weeks
Drug: Elamipretide
Subjects will receive once daily SC doses of 40 mg elamipretide for 96 weeks
Placebo
Subjects will receive once daily subcutaneous doses of placebo for 96 weeks
Drug: Placebo
Subjects will receive once daily SC doses of Placebo 96 weeks

Outcome Measures

Primary Outcome Measures
  1. Week 48 Rate of change in the macular area of photoreceptor loss
    Rate of change in the macular area of photoreceptor loss (defined as an EZ-RPE thickness of 0&mu;m) assessed by SD-OCT and EZ mapping at Week 48
Secondary Outcome Measures
  1. Week 72 Rate of change in the Macular area of photoreceptor loss
    Rate of change in the macular area of photoreceptor loss (defined as an EZ-RPE thickness of 0&mu;m) assessed by SD-OCT and EZ mapping at Week 72
  2. Week 96 Rate of change in the Macular area of photoreceptor loss
    Rate of change in the macular area of photoreceptor loss (defined as an EZ-RPE thickness of 0&mu;m) assessed by SD-OCT and EZ mapping
  3. Proportion of subjects gaining ≥ 10 letters (2 lines) in Low Luminance Best-Corrected Visual Acuity (LL BCVA)
    Proportion of subjects gaining &ge; 10 letters (2 lines) in Low Luminance Best- Corrected Visual Acuity (LL BCVA) from baseline at Week 48
  4. Proportion of subjects gaining ≥ 15 letters in Low Luminance Best-Corrected Visual Acuity (LL BCVA)
    Proportion of subjects gaining &ge; 15 letters (3 lines) in LL BCVA from baseline at Week 48

Eligibility Criteria

Ages Eligible for Study(Adult, Older Adult)
Sexes Eligible for StudyAll
Accepts Healthy VolunteersNo
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

Contacts and Locations

Sponsors and CollaboratorsStealth BioTherapeutics Inc.
Locations
Associated Retina Consultants | Phoenix Arizona, United States, 85020Barnet Dulaney Perkins Eye Center | Sun City Arizona, United States, 85351Retina Associates of Southern California | Huntington Beach California, United States, 92607Retina Consultants of San Diego | Poway California, United States, 92064Retinal Consultants Medical Group | Sacramento California, United States, 95825Orange County Retinal Medical Group | Santa Ana California, United States, 92705Bay Area Retina Associates | Walnut Creek California, United States, 94598Retina Consultants of Southern Colorado | Colorado Springs Colorado, United States, 80909Connecticut Eye Consultants, P.C. | Danbury Connecticut, United States, 06810Vitreo Retinal Associates | Gainesville Florida, United States, 32607Florida Retina Institute | Orlando Florida, United States, 32806Retina Vitreous Associates of Florida | St. Petersburg Florida, United States, 33711University Retina and Macula Associates | Oak Forest Illinois, United States, 60452Associated Vitreoretinal and Uveitis Consultants | Carmel Indiana, United States, 46290Mid Atlantic Retina Specialist | Hagerstown Maryland, United States, 21740Ophthalmic Consultants of Boston | Boston Massachusetts, United States, 02114Kellogg Eye Center | Ann Arbor Michigan, United States, 48105Retina Consultants of Minnesota | Minneapolis Minnesota, United States, 55435Mid Atlantic Retina | Cherry Hill New Jersey, United States, 08034NJ Retina | Teaneck New Jersey, United States, 07666Retina Vitreous Center | Edmond Oklahoma, United States, 73013Retina Northwest, PC | Portland Oregon, United States, 97221Retina Research Institute of Texas | Abilene Texas, United States, 79606Austin Clinical Research, LLC | Austin Texas, United States, 78750Retina Consultants of Texas | Bellaire Texas, United States, 77401Valley Retina Institute | McAllen Texas, United States, 78503Texas Retina Associates of Plano | Plano Texas, United States, 75075Medical Center Ophthalmology Associates | San Antonio Texas, United States, 78240Retina Consultants of Texas | The Woodlands Texas, United States, 77384Emerson Clinical Research Institute | Falls Church Virginia, United States, 22042Pacific Northwest Retina, PLLC | Silverdale Washington, United States, 98383Axon Clinical, s.r.o. | Prague , Czechia, Augenzentrum am St. Franziskus-Hospital | Münster , Germany, Klinik und Poliklinik für Augenheilkunde- Universitätsklinik Regensburg | Regensburg , Germany, Department für Augenheilkunde | Tübingen , Germany, University Of Debrecen Eye Center | Debrecen , Hungary, Ganglion Medical Center | Pécs , Hungary, University of Szeged, Department of Ophthalmology | Szeged , Hungary, Hospital Luigi Sacco Ophthalmology Dept | Milan , Italy, IRRCS Ospendale San Raffaele | Milan , Italy, Policlinico Milano | Milan , Italy, Fondazione Policlinico Gemelli | Roma , Italy, Department of Ophthalmology, Azienda SanitariaUniversitaria Friuli Centrale | Udine , Italy, Southern Eye Specialists | Christchurch , New Zealand, 8013Capital Eye Specialists | Wellington , New Zealand, 6011Centro de Oftalmologia Barraquer | Barcelona , Spain, OMIQ Research | Barcelona , Spain, Fundacion Aiken de la Comunitat Valenciana | Valencia , Spain, Oftalvist | Valencia , Spain, University Hospitals Bristol NHS Foundation Trust - Bristol Eye Hospital | Bristol , United Kingdom, University Hospitals of Leicester, Leicester Royal Infirmary | Leicester , United Kingdom, Macular Services, Central Middlesex Hospital, NHS Foundation Trust | London , United Kingdom, South Tyneside and Sunderland NHS Foundation Trust - Sunderland Eye Infirmary | Sunderland , United Kingdom,
Investigators
Study Director: Rekha Sathyanarayana, Stealth BioTherapeutics