SYX-5219 in healthy adults and adults with moderate-to-severe atopic dermatitis
Official title: A Multi-part, FiH Study in Healthy Participants and Participants With Atopic Dermatitis (AD) to Assess the Safety, Tolerability, Pharmacokinetics (PK) of Single & Multiple Ascending Doses and Selected Dose of SYX-5219 (AD Participants).
Run by Sitryx Therapeutics Ltd · NCT07558668 · Data updated 2026-11-12
This trial will test oral SYX-5219 in healthy adults and in adults with moderate-to-severe atopic dermatitis to see if it is safe, well tolerated, and how the drug is processed in the body.
Quick facts
| Phase | Phase 1 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years to 65 Years |
| Sex | All |
| Enrollment | 149 (estimated) |
| Sponsor | Sitryx Therapeutics Ltd Industry-sponsored |
| Locations | 14 sites (Arkansas City, Arkansas and 13 other locations) |
| Status | Recruiting |
| Started | February 26, 2025 |
| Main results expected | August 30, 2026 |
| Study ends | September 30, 2026 |
| Registry record updated | April 30, 2026 |
| Trial ID | NCT07558668 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are adults 18–65 with a confirmed diagnosis of moderate-to-severe atopic dermatitis meeting entry thresholds (≥10% BSA, EASI ≥16, vIGA ≥3, peak pruritus ≥4) and who meet the study's other health and medication restrictions.
✕Probably not a fit
Children, people with mild atopic dermatitis, those with major uncontrolled medical conditions, pregnant people, or those unable to stop prohibited systemic therapies are unlikely to be eligible or benefit from this Phase 1 program.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This is a first-in-human, multi-part, double-blind Phase 1 program that measures safety, tolerability, and pharmacokinetics of oral SYX-5219. Part 1 includes single ascending doses and a food-effect evaluation in healthy volunteers; Part 2 includes multiple ascending doses in healthy volunteers. Part 3 enrolls adults with moderate-to-severe atopic dermatitis who will be randomized to SYX-5219 or placebo for up to 42 days to collect safety and exploratory efficacy data. Early parts are done at a single site and the later part is run across multiple global sites with standard safety and PK sampling throughout.
Why it matters
Potential benefit: If successful, SYX-5219 could become a new oral treatment option that reduces symptoms for people with moderate-to-severe atopic dermatitis.
How similar studies have gone: This is a first-in-human program for SYX-5219; while some other oral small-molecule drugs for atopic dermatitis have shown benefit in later trials, this specific compound has not yet been tested in humans.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: Parts 1 \& 2 * Healthy male and female participant, between ≥ 18 to ≤ 65 years of age, inclusive, with a BMI of body mass index (BMI) of 18-32 kg/m2. * Female participant of non-childbearing potential or female of childbearing potential that is sexually abstinent. * No clinically significant abnormalities in laboratory, vital signs or ECG measurements. Part 3 * Male and female participants with clinically confirmed diagnosis of active AD, between ≥ 18 to ≤ 65 years of age, inclusive, with a BMI of body mass index (BMI) of ≤40 kg/m2. * Meet minimum AD entry criteria; * AD covering ≥10% of the body surface area (BSA) at screening and baseline. * Eczema Area and Severity Index (EASI) score ≥16 at screening and baseline. * Validated Investigator's Global Assessment (vIGA) score of ≥ 3 (moderate) at screening and baseline. * Peak Pruritus NRS score of ≥ 4 at screening and baseline. Exclusion Criteria: Parts 1 \& 2 • Use of prescription or non-prescription drugs, including vitamins, herbal and dietary supplements within 35 days or 5 half-lives (whichever is longer) prior to the first dose of IMP. Part 3 * Any clinically significant medical condition or physical/laboratory/ECG/vital signs abnormality that would, in the opinion of the Investigator, put the participant at undue risk. * Has medical history as stated in the main study exclusion criteria. * Received treatment(s) as stated in the main study exclusion criteria.
Where it's running
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Sitryx Clinical Site
Arkansas City, Arkansas, United States Recruiting -
Sitryx Clinical Site
Fremont, California, United States Recruiting -
Sitryx Clinical Site
Plainfield, Indiana, United States Recruiting -
Sitryx Clinical Site
Boardman, Ohio, United States Recruiting -
Sitryx Clinical Site
Philadelphia, Pennsylvania, United States Recruiting -
Sitryx Clinical Site
Bountiful, Utah, United States Recruiting
Show 8 more locations
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Sitryx Clinical Site
Sofia, Bulgaria Recruiting -
Sitryx Clinical Site
Berlin, Germany Recruiting -
Sitryx Clinical Site
Frankfurt, Germany Recruiting -
Sitryx Clinical Site
Dublin, Ireland Recruiting -
Sitryx Clinical Site
Manchester, United Kingdom Recruiting -
Sitryx Clinical Site
Merthyr Tydfil, United Kingdom Recruiting -
Sitryx Clinical Site
Herlev, Herlev, Denmark Not yet recruiting -
Sitryx Clinical Site
Freiburg im Breisgau, Germany Active not recruiting
Study contacts
- Study coordinator: Sitryx Therapeutics
- Email: info@sitryx.com
- Phone: +44 (0)1865 648401
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.