Phase 2 Tolerability and Effects of ALK-001 on Stargardt Disease (TEASE)


Alkeus Pharmaceuticals

Status and phase

Phase 2


Stargardt Macular Degeneration
Stargardt Disease
Stargardt Macular Dystrophy
Autosomal Recessive Stargardt Disease 1 (ABCA4-related)


Drug: Placebo
Drug: ALK-001

Study type


Funder types



R01FD006016 (Other Grant/Funding Number)

Details and patient eligibility


The purpose of this study is to determine the long term safety and tolerability of ALK-001 (C20-D3-retinyl acetate), and to explore the effects of ALK-001 on the progression of Stargardt disease in patients between the ages of 8 and 70 years old. Funding Source - FDA OOPD

Full description

This study evaluates the effects of orally-administered ALK-001 on the progression of Stargardt disease (ABCA4-related). Stargardt disease is a rare genetic disorder that leads to damage to the retina and results in legal blindness. Stargardt disease is caused by a defective ABCA4 gene, which affects the processing of vitamin A in the eye and leads to the formation of toxic vitamin A aggregates (called "vitamin A dimers") in the eye. Vitamin A dimers are thought to contribute to vision loss in Stargardt disease. ALK-001, the investigational drug, is a chemically-modified vitamin A designed as a replacement of vitamin A to prevent the formation of toxic vitamin A dimers in the eye. Trial participants will receive either ALK-001 or placebo, and follow-up visits will take place periodically for up to 24 months. There is currently no treatment for Stargardt disease.


140 estimated patients




8 to 70 years old


No Healthy Volunteers

Inclusion and exclusion criteria

Simplified Inclusion Criteria:

  • Male or female between 8 and 70 years old (inclusive), with any visual acuity
  • Has a clinical diagnosis of typical autosomal recessive Stargardt macular dystrophy (STGD1)
  • Has provided a genetic report indicating at least two ABCA4 disease-causing mutations. When only one ABCA4 disease-causing mutation is reported, sponsor's permission will be required.
  • At least one eye (called the "primary study eye") must have at least one well-demarcated area of significantly reduced autofluorescence as imaged by fundus autofluorescence (FAF), have decreased retinal sensitivity as measured by microperimetry, or have maculopathy expected to progress over the duration of the study
  • Primary study eye must have clear ocular media and adequate pupillary dilation, including no allergy to dilating eyedrops, to permit good quality retinal imaging
  • Healthy as judged by investigator
  • Able and willing to comply with study requirements, restrictions and instructions and is likely to complete the 24-month study
  • Has signed and dated the informed consent forms (or assent where appropriate) to participate
  • Female of childbearing potential has signed the informed consent about birth defects or attestation on contraception requirements

Main Exclusion Criteria:

  • Has taken disallowed items (supplement containing vitamin A or beta-carotene, liver-based products, or prescription oral retinoid medications) over the past 30 days
  • Is lactating, pregnant, or has a positive serum or urine pregnancy test at screening or at randomization
  • Has concurrent medical condition or history, which in the opinion of the investigator, is likely to prevent compliance with the protocol and/or interfere with absorption of ALK-001 or study procedures
  • Has clinically significant abnormal laboratory result(s) at screening
  • Has active or historical acute or chronic liver disorder
  • Has active or historical ocular disorder in the primary study eye that, in the opinion of the investigator, may confound assessment of the retina morphologically or functionally (this could include for example cataract surgery within the past 6 months, choroidal neovascularization (CNV), glaucoma, recurring uveitis, diabetic retinopathy, other retinal disease, etc.)
  • Has had intraocular surgery or injections in the primary study eye within 90 days of the screening visit
  • Has a clinically significant abnormal electrocardiogram (ECG), or has a corrected QT interval (QTc) that is 450 ms or greater

Trial design

140 participants in 2 patient groups, including a placebo group

Experimental group
Daily, oral administration of one capsule. See details below.
Drug: ALK-001
Placebo Comparator group
Daily, oral administration of one capsule. See details below.
Drug: Placebo

Trial contacts and locations



Central trial contact

Leonide Saad, PhD

Data sourced from

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