A Study of Guselkumab for the Treatment of Palmoplantar-non-Pustular Psoriasis

The purpose of this study is to evaluate the efficacy of guselkumab for the treatment of palmoplantar psoriasis.

Chronic plaque psoriasis is the most common form of psoriatic skin disease; however, there is growing evidence that other variants including scalp, nail, inverse, and palmoplantar psoriasis are prevalent, undertreated, and are correlated with an increased risk of psoriatic arthritis that may result in significant morbidity with functional impairment and greater impairment in quality of life. Therefore, the main aim of the study is to provide robust efficacy and safety data on guselkumab treatment for palmoplantar non-pustular psoriasis. The study comprises of a Screening Phase (4 Weeks \[Week -4 to 0\]), a Treatment Phase (up to Week 48) and a post-treatment follow-up phase (up to Week 56). Key efficacy assessments include physician assessments and patient-reported outcomes questionnaires. Safety evaluations will include 12-lead electrocardiogram at baseline, pregnancy testing and monitoring of vital signs at all visits and recording of adverse events throughout the study. Also, participants will be evaluated for signs and symptoms of active tuberculosis at all visits including follow-up visit. Biomarker assessments will include the evaluation of relevant markers in serum for all participants. The study will have an overall duration of 56 weeks.

Eligibility Criteria:
Inclusion Criteria:

* Should have all the following: A confirmed diagnosis of moderate-to-severe palmoplantar-non-pustular psoriasis with palm and/or sole involvement and at least one plaque at a body site other than the palms and soles for at least 6 months, to confirm a diagnosis of chronic psoriasis; psoriatic area and severity index (PASI) score greater than or equal to (\>=) 3 and less than (\<) 10 at screening and at baseline; Palmoplantar Investigator Global Assessment (ppIGA) score \>=3 at screening and at baseline
* Should be eligible to receive biological treatments; only participants who are naive to biological treatments can be included
* A woman of childbearing potential must have a negative urine pregnancy test at screening and at Week 0
* Agree not to receive a live virus or live bacterial vaccination during the study, or within 12 weeks after the last administration of study intervention
* Agree to avoid prolonged sun exposure and agree not to use tanning booths or other ultraviolet (UV) light sources from the first administration of study intervention through 12 weeks after the final dose of study intervention (Week 56)

Exclusion Criteria:

* Currently has palmoplantar pustulosis, pustular psoriasis, or any other forms other than plaque-type psoriasis (e.g, erythrodermic, guttate), or hyperkeratotic eczema
* Has current drug-induced psoriasis (eg, a new onset of psoriasis or an exacerbation of psoriasis from beta blockers, calcium channel blockers, or lithium)
* Has received prior systemic treatment with biological agents or Janus Kinase (JAK) inhibitors
* Has had prior exposure, known and reported intolerance to guselkumab or excipients, or ineligible to treatment with biological agents
* Is infected with human immunodeficiency virus (HIV, positive serology for HIV antibody)