Safety and Efficacy of Topical Bacteriotherapy for Atopic Dermatitis Using Staphylococcus Hominis A9

Summary

This is a Phase 1b, randomized, placebo/vehicle-controlled, double-blinded, multi-center trial. It is designed to assess the safety and efficacy of S. hominis A9 (ShA9) topical application as a treatment for atopic dermatitis (AD). The trial will enroll adults and adolescents with atopic dermatitis who are culture positive for S. aureus colonization. The primary safety objective of this study is to compare the safety profile of ShA9 to placebo (vehicle) over 14 weeks of application, which includes an initial two-week period of co-treatment with topical corticosteroids (TCS). The primary efficacy objective of this study is to assess the ability of ShA9, compared to placebo (vehicle), to prolong the period of atopic dermatitis control over 12 weeks after conclusion of an initial two-week period of co-treatment with TCS.

Description

Eligibility

Age range

12+ years

Sex

All

Healthy volunteers

No

Interventions

• Drug
  ShA9 Topical Gel

  The ShA9 topical gel contains phosphate-buffered saline solution (PBS), Glycerol, and hydroxyethylcellulose containing lyophilized ShA9 bacteria. The ShA9 bacteria is derived from a healthy donor-derived (allogeneic) commensal Staph species. The gel is manufactured and packaged by University of California San Diego (UCSD). It is applied twice daily to all areas identified as actively lesional during the Baseline Visit, regardless of ongoing lesional status, until the Week 14 Visit. If new lesions arise during this time, these areas will also be treated, regardless of ongoing lesional status, until the Week 14 Visit.

• Drug
  Hydrocortisone Ointment

  All participants will apply hydrocortisone ointment 2.5% alongside the study product in sensitive body areas (e.g., face, neck, intertriginous regions) for the first two weeks of the trial. It is applied twice daily to all areas identified as actively lesional during the Baseline Visit, regardless of ongoing lesional status, until the Week 2 Visit. If new lesions arise during this time, these areas will also be treated, regardless of ongoing lesional status, until the Week 2 Visit.

• Drug
  Clobetasol Ointment

  All participants will apply clobetasol ointment 0.05% alongside the study product in non-sensitive body areas (e.g., arms, legs, torso) for the first two weeks of the trial. It will be applied twice daily to lesional skin and selected sampling areas from Baseline to Week 2. It is applied twice daily to all areas identified as actively lesional during the Baseline Visit, regardless of ongoing lesional status, until the Week 2 Visit. If new lesions arise during this time, these areas will also be treated, regardless of ongoing lesional status, until the Week 2 Visit.

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