Stargardt DiseasePhase 2NCT04239625
Open-Label Extension: Tolerability and Effects of ALK-001 on Stargardt Disease (TEASE)
A Phase 2 study testing ALK-001 in people with Stargardt Disease and Stargardt Macular Degeneration, run by Alkeus Pharmaceuticals, Inc. at 8 sites in United States.
Trial summary
The purpose of this open-label, multicenter study is to determine the long-term safety, pharmacokinetics and effects of ALK-001 (C20-D3-retinyl acetate) on the progression of Stargardt disease. This study is an extension of NCT02402660 and enrolls participants who are at least 8 years old. Read more about this study
- Who is it for?
- Ages 8 to 70 years
- Conditions the study is for
- Stargardt Disease, Stargardt Macular Degeneration, Stargardt Macular Dystrophy
- What is being tested?
- ALK-001
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 200 participants
- Where
- 8 sitesUnited States
- Study dates
- 20 Dec 2019to Dec 2029
- Phase
- Phase 2
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 8 to 70 years
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Simplified Inclusion Criteria:
- Clinical diagnosis of Stargardt disease (STGD1)
- Has at least two ABCA4 disease-causing mutations, unless authorized by sponsor
- Has a best-corrected visual acuity (BCVA) greater than approximately 20/160 in at least one eye
- 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 been invited to participate in this extension, and has signed and dated the informed consent forms (or assent where appropriate) to participate
- Female of childbearing potential has signed the attestation on contraception requirements
Simplified Exclusion Criteria:
- Is lactating or pregnant
- Has a medical condition likely to prevent compliance with the protocol and/or interfere with absorption of ALK-001 or performance of study procedures
- Has abnormal laboratory result(s) at screening
- Has an ocular disorder that may confound ocular assessments
- Has a history of ocular intervention within 90 days of screening
Trial locations and contacts
8 sites in 1 country.
8 sites in 1 country
United States8 sites
Alkeus Site
Aurora, Colorado, 80045
Alkeus Site
Gainesville, Florida, 32601
Alkeus Site
Grand Rapids, Michigan, 49456
Alkeus Site
Indianapolis, Indiana, 46202
Alkeus Site
Los Angeles, California, 90095
Alkeus Site
Phoenix, Arizona, 85020
Alkeus Site
Silverdale, Washington, 98383
Alkeus Site
Westbury, New York, 11590
About this study
Official title: A Phase 2 Multicenter, Double-Masked, Randomized, Placebo-Controlled Study to Investigate the Long Term Safety, Tolerability, Pharmacokinetics and Effects of ALK-001 on the Progression of Stargardt Disease
The purpose of this open-label, multicenter study is to determine the long-term safety, pharmacokinetics and effects of ALK-001 (C20-D3-retinyl acetate) on the progression of Stargardt disease. This study is an extension of NCT02402660 and enrolls participants who are at least 8 years old. Enrollment is by invitation only.
Funding Source - FDA OOPD
- Conditions
- Stargardt Disease, Stargardt Macular Degeneration, Stargardt Macular Dystrophy, Autosomal Recessive Stargardt Disease 1 (ABCA4-related)
- Being tested
- ALK-001
- Medical subject headings
- Stargardt Disease
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
ALK-001Drug
Also called C20-D3-Retinyl Acetate, C20 Deuterated vitamin A
Oral administration of a pill for up to 24 months
| Study group | Role | What they receive |
|---|---|---|
| ALK-001 | Experimental | Not described Receives: Drug: ALK-001 |
What is being measured
The primary outcome is the main question the study is designed to answer.
Safety and tolerability of ALK-001 assessed by incidence and/or clinically-significant changes of a combination of ocular and non-ocular adverse events
Measured: From baseline to 24 months
Pharmacokinetic profile of ALK-001 derived from the concentrations of ALK-001 and metabolites in plasma
Measured: Up to 24 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted27 Jan 2020
- Study start20 Dec 2019
- Primary completionDec 2028 (estimated)
- Study completionDec 2029 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (5)Papers the sponsor has linked to this study.
- Other trials for Stargardt DiseaseStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 200 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Alkeus Pharmaceuticals, Inc.
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04239625
- Sponsor's protocol ID
- ALK001-P1002-EXT
- Other IDs
- R01FD004098, R01FD006016, R01FD006316
- Status last verified
- Sep 2026
- First submitted
- 11 Jan 2020
- Last updated
- 21 Sep 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Ma L, Kaufman Y, Zhang J, Washington I. C20-D3-vitamin A slows lipofuscin accumulation and electrophysiological retinal degeneration in a mouse model of Stargardt disease. J Biol Chem. 2011 Mar 11;286(10):7966-7974. doi: 10.1074/jbc.M110.178657. Epub 2010 Dec 14.
PubMed 21156790Kaufman Y, Ma L, Washington I. Deuterium enrichment of vitamin A at the C20 position slows the formation of detrimental vitamin A dimers in wild-type rodents. J Biol Chem. 2011 Mar 11;286(10):7958-7965. doi: 10.1074/jbc.M110.178640. Epub 2010 Nov 12.
PubMed 21075840Mihai DM, Jiang H, Blaner WS, Romanov A, Washington I. The retina rapidly incorporates ingested C20-D(3)-vitamin A in a swine model. Mol Vis. 2013 Jul 25;19:1677-83. Print 2013.
PubMed 23914132Charbel Issa P, Barnard AR, Herrmann P, Washington I, MacLaren RE. Rescue of the Stargardt phenotype in Abca4 knockout mice through inhibition of vitamin A dimerization. Proc Natl Acad Sci U S A. 2015 Jul 7;112(27):8415-20. doi: 10.1073/pnas.1506960112. Epub 2015 Jun 23.
PubMed 26106163Saad L, Washington I. Can Vitamin A be Improved to Prevent Blindness due to Age-Related Macular Degeneration, Stargardt Disease and Other Retinal Dystrophies? Adv Exp Med Biol. 2016;854:355-61. doi: 10.1007/978-3-319-17121-0_47.
PubMed 26427432
Study at a glance
From the registry record, last updated by the sponsor on 21 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Phase 2 Multicenter, Double-Masked, Randomized, Placebo-Controlled Study to Investigate the Long Term Safety, Tolerability, Pharmacokinetics and Effects of ALK-001 on the Progression of Stargardt Disease
- ClinicalTrials.gov ID
- NCT04239625
- Acronym / sponsor ID
- ALK001-P1002-EXT
- Conditions
- Stargardt Disease, Stargardt Macular Degeneration, Stargardt Macular Dystrophy, Autosomal Recessive Stargardt Disease 1 (ABCA4-related)
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Active, not recruiting
- Enrolment
- 200 participants (estimated)
- Lead sponsor
- Alkeus Pharmaceuticals, Inc.Industry (pharma, biotech, devices)
- Study start
- 20 Dec 2019 (actual)
- Primary completion
- Dec 2028 (estimated)
- Study completion
- Dec 2029 (estimated)
- First posted
- 27 Jan 2020 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of this open-label, multicenter study is to determine the long-term safety, pharmacokinetics and effects of ALK-001 (C20-D3-retinyl acetate) on the progression of Stargardt disease. This study is an extension of NCT02402660 and enrolls participants who are at least 8 years old. Enrollment is by invitation only.
Funding Source - FDA OOPD
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| ALK-001 | Experimental | Drug: ALK-001 |
Who may qualify
- Ages
- 8 to 70 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| ALK-001Also: C20-D3-Retinyl Acetate, C20 Deuterated vitamin AOral administration of a pill for up to 24 months | Drug | ALK-001 |
Primary outcome
Safety and tolerability of ALK-001 assessed by incidence and/or clinically-significant changes of a combination of ocular and non-ocular adverse events
Time frame: From baseline to 24 months
Pharmacokinetic profile of ALK-001 derived from the concentrations of ALK-001 and metabolites in plasma
Time frame: Up to 24 months
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 21 Sep 2026.
- Background: PubMed 21156790Ma L, Kaufman Y, Zhang J, Washington I. C20-D3-vitamin A slows lipofuscin accumulation and electrophysiological retinal degeneration in a mouse model of Stargardt disease. J Biol Chem. 2011 Mar 11;286(10):7966-7974. doi: 10.1074/jbc.M110.178657. Epub 2010 Dec 14.
- Background: PubMed 21075840Kaufman Y, Ma L, Washington I. Deuterium enrichment of vitamin A at the C20 position slows the formation of detrimental vitamin A dimers in wild-type rodents. J Biol Chem. 2011 Mar 11;286(10):7958-7965. doi: 10.1074/jbc.M110.178640. Epub 2010 Nov 12.
- Background: PubMed 23914132Mihai DM, Jiang H, Blaner WS, Romanov A, Washington I. The retina rapidly incorporates ingested C20-D(3)-vitamin A in a swine model. Mol Vis. 2013 Jul 25;19:1677-83. Print 2013.
- Background: PubMed 26106163Charbel Issa P, Barnard AR, Herrmann P, Washington I, MacLaren RE. Rescue of the Stargardt phenotype in Abca4 knockout mice through inhibition of vitamin A dimerization. Proc Natl Acad Sci U S A. 2015 Jul 7;112(27):8415-20. doi: 10.1073/pnas.1506960112. Epub 2015 Jun 23.
- Background: PubMed 26427432Saad L, Washington I. Can Vitamin A be Improved to Prevent Blindness due to Age-Related Macular Degeneration, Stargardt Disease and Other Retinal Dystrophies? Adv Exp Med Biol. 2016;854:355-61. doi: 10.1007/978-3-319-17121-0_47.
- Please leave your name if you would like to be contacted to discuss this trialLink provided by the sponsor.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
8 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing ALK-001 in people with Stargardt Disease and Stargardt Macular Degeneration, run by Alkeus Pharmaceuticals, Inc. at 8 sites in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: under way, not looking for participants, as of the sponsor's last update on 21 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 8 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Safety and tolerability of ALK-001 assessed by incidence and/or clinically-significant changes of a combination of ocular and non-ocular adverse events (time frame: From baseline to 24 months). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT04239625, which also lists 5 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 21 Sep 2026.