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

Stealth BioTherapeutics

Status and phase: Enrolling; Phase 3

Conditions: Age Related Macular Degeneration (ARMD)

Treatments: Drug: Elamipretide; Drug: Placebo

Study type: Interventional

Funder types: Industry

Identifiers

NCT06373731

SPIAM-301

Details and patient eligibility

About

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.

Full 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

Enrollment: 360 estimated patients

Sex: All

Ages: 55+ years old

Volunteers: No Healthy Volunteers

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 by history or FA in the study eye, 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 > 2 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 > +2 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 of diabetic retinopathy (a history of diabetes mellitus without retinopathy is not a criterion for exclusion) in either eye

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 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

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Quadruple Blind

---

360 participants in 2 patient groups, including a placebo group

Elamipretide

Experimental group

Description:

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

Treatment:

Drug: Elamipretide

Placebo

Placebo Comparator group

Description:

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

Treatment:

Drug: Placebo