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NCT Number: NCT06953466

Clinical Study of QRX003 Lotion in Subjects With Netherton Syndrome

The goal of this clinical trial (via an expanded access Treatment Protocol) is to learn if QRX003 (an investigational drug) applied topically to the skin (including up to the entire body [except the scalp]) works to treat the genetic disease Netherton syndrome. It will also learn about the safety of QRX003. The main questions the trial aims to answer are:

1. Does QRX003 impact the clinical presentation of NS in adults and minors by improving the clinical symptoms (diseased skin area, itch, and discomfort; based on clinical scoring, subject self-assessment, and other criteria)? 2. What medical problems do participants have when taking QRX003? 3. What percent of subjects will require rescue therapy?

Participants will:

Take drug QRX003 twice daily (applied topically to all affected areas of the body excluding the scalp) for 3 months, visit the clinic once every 4-6 weeks for checkups and tests, and to keep a dosing diary that records the times they applied the drug.

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Key information

Conditions

Netherton Syndrome Abnormalities, Multiple Congenital Abnormalities Congenital, Hereditary, and Neonatal Diseases and Abnormalities Genetic Diseases, Inborn Ichthyosiform Erythroderma, Congenital Ichthyosis Infant, Newborn, Diseases Keratosis Skin Abnormalities Skin Diseases Skin Diseases, Genetic Skin and Connective Tissue Diseases

Age range

14 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2 / Phase 3

Primary location

Northwestern Memorial Hospital

Chicago, Illinois, 60611, United States

Location status: Recruiting

Location contact

Oleg G Khatsenko

CONTACT

[email protected]

858-571-1800 ext. 166

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Subject is a male or non-pregnant female at least 14 years of age.
  • Females must be post-menopausal , surgically sterile , or use an effective method of birth control , for the duration of the study and for 3 months following completion of treatment. Women of childbearing potential (WOCBP) must have a negative urine pregnancy test (UPT) at Visit 1/Screening and Visit 2/Baseline.
  • Subject has a clinical diagnosis of NS and agrees to genetic testing at Visit 1/Screening for confirmation of NS diagnosis if the subject does not have test results confirming a SPINK5 mutation.
  • Subject is in good general health and free of any disease state or physical condition that might impair evaluation of NS or exposes the subject to an unacceptable risk by study participation.
  • Subject is on a stable treatment regimen including topical therapy for NS prior to baseline that is expected to remain stable for the duration of the study

Exclusion criteria

  • Subject is pregnant, lactating, or is planning to become pregnant during the study.
  • Subject has any skin pathology in the Treatment Area or condition that, could interfere with the evaluation of the test article or requires use of interfering topical, systemic, or surgical therapy.
  • Subject has active cancer of any type excluding non-melanoma skin cancer outside of the Treatment Area.
  • Subject has diabetes of any type, except non-insulin dependent diabetes mellitus that is reasonably controlled.
  • Subject has evidence of active infection during screening, or serious infection within 30 days prior to Visit 2/Baseline.
  • Subject has known human immunodeficiency virus, hepatitis B or C virus, or active or latent tuberculosis.
  • Subject has used ultraviolet phototherapy within the Treatment Area within 10 weeks prior to Visit 2/Baseline.
  • Subject has used topical prescription treatment in the Treatment Area within 10 weeks prior to Visit 2/Baseline.
  • Subject has used any topical steroid prescription treatments in the Treatment Area within 10 weeks prior to Visit 2/Baseline.
  • Subject is currently enrolled in an investigational drug, biologic, or device study.
  • Subject has used an investigational drug, biologic, or device treatment within 30 days prior to Visit 2/Baseline.

Treatment and study plan

QRX003, 4% Lotion

Drug

QRX003 Topical Lotion containing 4% active drug (serine protease inhibitor)

Primary outcomes

  1. Proportion of subjects with 1-point reduction on IGA

    Time frame: Up to week 16

    Description: Proportion of subjects with 1-point reduction on the Investigator's Global Assessment (IGA) from Baseline. The IGA assesses overall severity of a subject's NS based on a 5-point scale where 0 = clear, 1 = almost clear, 2 = mild, 3 = moderate, and 4 = severe.

Other outcomes

  1. Proportion of subjects with 2-point reduction on IGA

    Time frame: Up to week 16

    Proportion of subjects with 2-point reduction in IGA from Baseline.

  2. NS surface area change

    Time frame: Up to week 16

    Change from Baseline in total Body Surface Area (BSA) affected by NS in the Treatment Area

  3. WI-NRS score change

    Time frame: Up to week 16

    Change from Baseline in the Worst Itch-Numeric Rating Scale (WI-NRS) score ≥4. Itch severity is graded on an 11-point scale where 0 represents "no itch" and 10 represents "worst itch imaginable".

  4. Safety Assessment-AEs

    Time frame: Up to week 16

    Any local and systemic AEs (Adverse Events)/serious AEs

Study contacts

Contact information is provided by the study sponsor or research team.

Oleg G Khatsenko

CONTACT

[email protected]

858-571-1800 ext. 166

TI Clinical Research

CONTACT

[email protected]

858-571-1800 ext. 147

Sponsors and collaborators

Lead sponsor

Quoin Pharmaceuticals

Industry

Registry information

Official study title

A Single Center, Open Label, Expanded Access Study of QRX003 Lotion in Subjects With Netherton Syndrome

Important dates

Study start
2025
Primary completion
2026
Study completion
2026
First posted
May 1, 2025
Registry last updated
Jul 20, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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