Topical treatment for adults with Netherton Syndrome

A Randomized, Double-Blind, Vehicle-Controlled, First-in-Human Safety, Tolerability and Proof-of-Concept Study of Topical ATR12-351 in Adults With Netherton Syndrome

Phase 1 Interventional Azitra Inc. · NCT06137157

This study is testing a new ointment for adults with Netherton Syndrome to see if it helps improve their skin condition.

Quick facts

PhasePhase 1
Study typeInterventional
Enrollment12 (estimated)
Ages18 Years and up
SexAll
SponsorAzitra Inc. Industry-sponsored
Locations2 sites (Palo Alto, California and 1 other locations)
Trial IDNCT06137157 on ClinicalTrials.gov

What this trial studies

This clinical trial evaluates the safety and tolerability of a topical ointment, ATR12-351, in adults diagnosed with Netherton Syndrome. The study involves applying ATR12-351 to skin lesions on one side of the body while using a vehicle control on the other side, twice daily for two weeks. The trial aims to understand how the body processes ATR12-351 and to observe any treatment benefits in approximately 12 participants. Netherton Syndrome is a rare genetic condition that severely affects the skin, hair, and immune system, and currently has no FDA-approved treatments.

Who should consider this trial

Good fit: Ideal candidates for this study are adults aged 18 and older with a confirmed mutation in the SPINK5 gene and significant skin involvement due to Netherton Syndrome.

Not a fit: Patients currently using biologic therapies or other immunosuppressive treatments may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could provide a novel therapeutic option for patients suffering from Netherton Syndrome.

How similar studies have performed: While this approach is novel, it is based on the underlying biology of Netherton Syndrome, and similar studies have not yet been conducted.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Adults ≥18 years of age
* Confirmed mutation of the serine protease inhibitor of Kazal type 5 (SPINK5) gene
* Involvement of ≥20% of body surface area with skin changes consistent with Netherton syndrome

Exclusion Criteria:

* Use of biologic therapies, antibiotics, antihistamines, corticosteroids, retinoids, disease-modifying antirheumatic drugs (DMARDs), immunosuppressive agents, phosphodiesterase-4 (PDE4) inhibitors, topical calcineurin inhibitors, or topical Janus kinase (JAK) inhibitors
* Open wounds or extensive areas of excoriation precluding identification of appropriate application sites in the Investigator's judgment
* Concurrent involvement in any other clinical study/expanded access program with an investigational drug or device or has participated in a clinical study within 30 days prior to the screening visit
* Residing with an immunocompromised person in the same dwelling from the baseline visit through 2 weeks after the treatment period
* History of ultraviolet phototherapy within the planned treatment area 4 weeks prior to baseline

Where this trial is running

Palo Alto, California and 1 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Netherton SyndromeIchthyosisNetherton syndromeSkin diseaseichthyosis linearis circumflexa
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.