Examining how Guselkumab affects immune cells in scalp psoriasis

Immune Spatial Features of Guselkumab Cutaneous Response

Phase 4 Interventional University of California, San Francisco · NCT05858632

This study is testing how the medication Guselkumab affects immune cells in people with moderate to severe scalp psoriasis to see how it helps their condition.

Quick facts

PhasePhase 4
Study typeInterventional
Enrollment10 (estimated)
Ages18 Years and up
SexAll
SponsorUniversity of California, San Francisco Academic / other
Drugs / interventionsGuselkumab
Locations1 site (San Francisco, California)
Trial IDNCT05858632 on ClinicalTrials.gov

What this trial studies

This study investigates the impact of Guselkumab, an FDA-approved medication for psoriasis, on immune cells in scalp psoriasis lesions. It is a one-arm, open-label study involving ten subjects with moderate to severe scalp psoriasis. Participants will undergo biopsy procedures to collect samples for molecular profiling, which will help correlate immune cell profiles with treatment responses to Guselkumab. The goal is to better understand the immune spatial features associated with the drug's effectiveness.

Who should consider this trial

Good fit: Ideal candidates are individuals with moderate to severe scalp psoriasis, indicated by a psoriasis scalp severity index (PSSI) of 12 or higher.

Not a fit: Patients currently taking systemic immunosuppressives, pregnant, or with severe immunodeficiency may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could enhance treatment strategies for patients with scalp psoriasis by providing insights into immune responses to Guselkumab.

How similar studies have performed: Other studies have shown success with IL-23 blockade therapies in psoriasis, indicating a promising approach in this area.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria: possess a PSSI (psoriasis scalp severity index) of ≥12

Exclusion Criteria:

1. taking systemic immunosuppressives in the last 4 weeks
2. pregnancy
3. severe immunodeficiency (either from genetic or infectious causes).
4. tuberculosis or other active serious infection
5. active systemic malignancy.
6. breast-feeding
7. Presence of a condition or abnormality that in the opinion of the Investigator would compromise the safety of the patient or the quality of the data.
8. Males who are trying to conceive

   \-

Where this trial is running

San Francisco, California

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 Psoriasis of Scalp
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.