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Taking people in United StatesPhase 2

A Phase 2 Study of TCP-25 Gel in Patients With Epidermolysis Bullosa, STEP-study

Key facts

Who runs it
Xinnate AB
Where
Cincinnati, United StatesSee the siteAlso in 6 other countries, 12 sites
Trial code
Status
Recruiting
Phase
Phase 2
People taking part
32 people, planned
Started
30 Jan 2026
Expected to end
30 Jun 2027
Type of study
Interventional, 2 groupsOne group gets a placebo (a dummy treatment), for comparison.
Treatments tested
  • TCP-25 gel
  • Vehicle (placebo)
Record updated
2 November 2026

Who can take part

Age
4 years and older
Sex
Women and men
Healthy volunteers
Cannot take part

The registry criteria, word for word

Show all 6 criteriaShow less

Who can take part

  • Male or female patients with documented diagnosis of DEB or JEB, confirmed by genetic testing and/or by a skin biopsy with immunofluorescence mapping
  • Patients ≥4 years old. Note: Initially, patients ≥12 years will be enrolled. Enrollment will be open to 4 to 11 year old pediatric patients (both inclusive), after a DMC reviews and provides a positive opinion regarding the safety and tolerability of the IMP in at least 3 patients 12 to 18 years old who have completed at least 4 weeks of IMP use

Who cannot take part

  • The patient is currently being treated or planned to be treated with systemic antibiotics; Note: Use of preventive and/or anti-inflammatory antibiotic treatment, including doxycycline, on an established treatment regimen (stable dose for ≥6 weeks before the Baseline Visit) is permitted. Use of topical antibiotics on the index wounds within 7 days before the Baseline Visit is prohibited
  • Use of systemic corticosteroids \>0.2 mg/kg prednisone dose equivalent per day within 30 days or use of topical corticosteroids on index wounds within 7 days before the Screening Visit; Note: Corticosteroids for inhalation, ophthalmic, or intranasal use are permitted
  • The patient has a history of or current malignancy over the index wound, eg, basal cell carcinoma or squamous cell carcinoma
  • The patient has any subtype of EB other than DEB or JEB

Where in United States

Also in 6 other countries, 12 sites

  • Cincinnati Children's Hospital Medical CenterCincinnati, United StatesContact: Dr. Kalyani Marathe, PI, MDTaking people

About the trial

What the trial wants to find out

This is a Phase 2, double-blind, randomized, vehicle-controlled study designed to evaluate efficacy, safety, and tolerability of topically applied TCP-25 gel in patients with confirmed DEB or JEB. The study will implement intrasubject randomization, ie, a pair of matching index wounds will be randomly assigned to be treated with a local application of either TCP 25 gel or vehicle gel.

The 2 groups in the trial

  • TCP-25Treatment being tested

    Topical gel

    Treatment: TCP-25 gel

  • VehiclePlacebo, for comparison

    Placebo gel

    Treatment: Vehicle (placebo)

Questions to ask the study team

  1. How often do I need to come in, and for how long each time?
  2. Are travel costs paid?
  3. Can I keep my own doctor?
  4. What happens if I want to stop?

Contact the study team: see the registry record → Contacts and Locations

Print a page for my doctor

Data and sources

Registry record
Listed on ClinicalTrials.gov.
Official title
A Randomized, Double-blind, Vehicle-controlled Phase 2 Study to Evaluate Efficacy, Safety, and Tolerability of Topically Applied TCP-25 in Patients With Epidermolysis Bullosa
Record updated
2 November 2026