Evaluating the safety and effects of BCX17725 in patients with Netherton Syndrome

A Phase 1/1b Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Immunogenicity of Single and Multiple Ascending Doses of BCX17725 in Healthy Participants and Multiple Doses of BCX17725 in Participants With Netherton Syndrome

Phase 1 Interventional BioCryst Pharmaceuticals · NCT06539507

This study is testing a new drug called BCX17725 to see if it is safe and effective for people with Netherton Syndrome.

Quick facts

PhasePhase 1
Study typeInterventional
Enrollment78 (estimated)
Ages12 Years to 65 Years
SexAll
SponsorBioCryst Pharmaceuticals Industry-sponsored
Locations12 sites (Palo Alto, California and 11 other locations)
Trial IDNCT06539507 on ClinicalTrials.gov

What this trial studies

This is a first-in-human, Phase 1 study designed to assess the safety, tolerability, pharmacokinetics, and immunogenicity of BCX17725. The study consists of three parts: the first two parts involve healthy adult participants receiving single and multiple ascending doses of the drug in a randomized, placebo-controlled manner, while the third part focuses on participants with Netherton Syndrome receiving multiple doses in an open-label format. The goal is to gather comprehensive data on how the drug behaves in the body and its potential effects on the target condition.

Who should consider this trial

Good fit: Ideal candidates for this study are adults aged 18 to 65 with a confirmed diagnosis of Netherton Syndrome.

Not a fit: Patients who do not have Netherton Syndrome or are outside the specified age range will not benefit from this study.

Why it matters

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

How similar studies have performed: While this is a first-in-human study, similar approaches in pharmacokinetics and immunogenicity assessments have shown promise in other conditions.

Eligibility criteria

Show full inclusion / exclusion criteria
Key Inclusion Criteria:

* Male or non-pregnant, non-lactating female aged 18 to 55 years, inclusive (Parts 1 and 2), 18 to 65 years, inclusive (Part 3), or 12 to 65 years, inclusive (Part 4)
* Confirmed diagnosis of Netherton syndrome (Parts 3 and 4)
* IGA score of ≥ 3 (Parts 3 and 4) and IASI score of ≥ 16 (Part 4)
* BMI between 18 and 30 kg/m\^2, inclusive (Parts 1 and 2)
* Estimated glomerular filtration rate (eGFR) of ≥ 90 mL/min/1.73 m\^2 (Parts 1 and 2) or ≥ 60 mL/min/1.73 m\^2 (Part 3)
* Agree to follow the protocol contraception requirements from screening until 90 days after the last dose of study drug
* In the opinion of the investigator, expected to adequately comply with all required study procedures and restrictions for the duration of the study

Where this trial is running

Palo Alto, California and 11 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 SyndromeFirst-in-humanSingle ascending doseMultiple ascending dosePharmacokineticsPlacebo controlNetherton syndrome
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.