A Study to Evaluate the Efficacy, Safety, and Pharmacokinetics of Subcutaneously Administered Guselkumab for the Treatment of Chronic Plaque Psoriasis in Pediatric Participants (PROTOSTAR)
A Phase 3, Multicenter, Randomized, Placebo- and Active Comparator-Controlled Study Evaluating the Efficacy, Safety, and Pharmacokinetics of Subcutaneously Administered Guselkumab for the Treatment of Chronic Plaque Psoriasis in Pediatric Subjects (>=6 To <18 Years of Age)
Sponsor: Janssen Research & Development, LLC
This PHASE3 trial investigates Psoriasis and is currently ongoing. Janssen Research & Development, LLC leads this study, which shows 82 recorded versions since 2018 — indicating substantial longitudinal coverage. The change history captured here reflects the iterative nature of clinical trial conduct.
Status Flow
Change History
82 versions recorded-
Mar 2026 — Present [monthly]
Active Not Recruiting PHASE3
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Feb 2026 — Mar 2026 [monthly]
Active Not Recruiting PHASE3
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Jan 2026 — Feb 2026 [monthly]
Active Not Recruiting PHASE3
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Dec 2025 — Jan 2026 [monthly]
Active Not Recruiting PHASE3
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Nov 2025 — Dec 2025 [monthly]
Active Not Recruiting PHASE3
▶ Show 77 earlier versions
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Oct 2025 — Nov 2025 [monthly]
Active Not Recruiting PHASE3
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Sep 2025 — Oct 2025 [monthly]
Active Not Recruiting PHASE3
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Aug 2025 — Sep 2025 [monthly]
Active Not Recruiting PHASE3
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Jun 2025 — Aug 2025 [monthly]
Active Not Recruiting PHASE3
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May 2025 — Jun 2025 [monthly]
Active Not Recruiting PHASE3
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Apr 2025 — May 2025 [monthly]
Active Not Recruiting PHASE3
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Feb 2025 — Apr 2025 [monthly]
Active Not Recruiting PHASE3
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Jan 2025 — Feb 2025 [monthly]
Active Not Recruiting PHASE3
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Nov 2024 — Jan 2025 [monthly]
Active Not Recruiting PHASE3
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Oct 2024 — Nov 2024 [monthly]
Active Not Recruiting PHASE3
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Sep 2024 — Oct 2024 [monthly]
Active Not Recruiting PHASE3
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Aug 2024 — Sep 2024 [monthly]
Active Not Recruiting PHASE3
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Jul 2024 — Aug 2024 [monthly]
Active Not Recruiting PHASE3
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Jun 2024 — Jul 2024 [monthly]
Active Not Recruiting PHASE3
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May 2024 — Jun 2024 [monthly]
Active Not Recruiting PHASE3
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Apr 2024 — May 2024 [monthly]
Active Not Recruiting PHASE3
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Mar 2024 — Apr 2024 [monthly]
Active Not Recruiting PHASE3
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Feb 2024 — Mar 2024 [monthly]
Active Not Recruiting PHASE3
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Jan 2024 — Feb 2024 [monthly]
Active Not Recruiting PHASE3
Status: Recruiting → Active Not Recruiting
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Dec 2023 — Jan 2024 [monthly]
Recruiting PHASE3
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Nov 2023 — Dec 2023 [monthly]
Recruiting PHASE3
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Oct 2023 — Nov 2023 [monthly]
Recruiting PHASE3
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Sep 2023 — Oct 2023 [monthly]
Recruiting PHASE3
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Aug 2023 — Sep 2023 [monthly]
Recruiting PHASE3
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Jun 2023 — Aug 2023 [monthly]
Recruiting PHASE3
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May 2023 — Jun 2023 [monthly]
Recruiting PHASE3
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Apr 2023 — May 2023 [monthly]
Recruiting PHASE3
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Mar 2023 — Apr 2023 [monthly]
Recruiting PHASE3
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Feb 2023 — Mar 2023 [monthly]
Recruiting PHASE3
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Jan 2023 — Feb 2023 [monthly]
Recruiting PHASE3
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Dec 2022 — Jan 2023 [monthly]
Recruiting PHASE3
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Nov 2022 — Dec 2022 [monthly]
Recruiting PHASE3
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Sep 2022 — Nov 2022 [monthly]
Recruiting PHASE3
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Jul 2022 — Sep 2022 [monthly]
Recruiting PHASE3
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Jun 2022 — Jul 2022 [monthly]
Recruiting PHASE3
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May 2022 — Jun 2022 [monthly]
Recruiting PHASE3
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Mar 2022 — May 2022 [monthly]
Recruiting PHASE3
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Feb 2022 — Mar 2022 [monthly]
Recruiting PHASE3
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Jan 2022 — Feb 2022 [monthly]
Recruiting PHASE3
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Dec 2021 — Jan 2022 [monthly]
Recruiting PHASE3
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Nov 2021 — Dec 2021 [monthly]
Recruiting PHASE3
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Oct 2021 — Nov 2021 [monthly]
Recruiting PHASE3
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Sep 2021 — Oct 2021 [monthly]
Recruiting PHASE3
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May 2021 — Sep 2021 [monthly]
Recruiting PHASE3
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Apr 2021 — May 2021 [monthly]
Recruiting PHASE3
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Mar 2021 — Apr 2021 [monthly]
Recruiting PHASE3
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Jan 2021 — Mar 2021 [monthly]
Recruiting PHASE3
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Dec 2020 — Jan 2021 [monthly]
Recruiting PHASE3
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Nov 2020 — Dec 2020 [monthly]
Recruiting PHASE3
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Oct 2020 — Nov 2020 [monthly]
Recruiting PHASE3
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Sep 2020 — Oct 2020 [monthly]
Recruiting PHASE3
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Aug 2020 — Sep 2020 [monthly]
Recruiting PHASE3
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Jul 2020 — Aug 2020 [monthly]
Recruiting PHASE3
Status: Suspended → Recruiting
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Jun 2020 — Jul 2020 [monthly]
Suspended PHASE3
Status: Recruiting → Suspended
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Mar 2020 — Jun 2020 [monthly]
Recruiting PHASE3
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Jan 2020 — Mar 2020 [monthly]
Recruiting PHASE3
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Dec 2019 — Jan 2020 [monthly]
Recruiting PHASE3
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Nov 2019 — Dec 2019 [monthly]
Recruiting PHASE3
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Oct 2019 — Nov 2019 [monthly]
Recruiting PHASE3
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Sep 2019 — Oct 2019 [monthly]
Recruiting PHASE3
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Jul 2019 — Sep 2019 [monthly]
Recruiting PHASE3
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Jun 2019 — Jul 2019 [monthly]
Recruiting PHASE3
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May 2019 — Jun 2019 [monthly]
Recruiting PHASE3
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Apr 2019 — May 2019 [monthly]
Recruiting PHASE3
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Mar 2019 — Apr 2019 [monthly]
Recruiting PHASE3
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Feb 2019 — Mar 2019 [monthly]
Recruiting PHASE3
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Jan 2019 — Feb 2019 [monthly]
Recruiting PHASE3
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Dec 2018 — Jan 2019 [monthly]
Recruiting PHASE3
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Nov 2018 — Dec 2018 [monthly]
Recruiting PHASE3
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Oct 2018 — Nov 2018 [monthly]
Recruiting PHASE3
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Sep 2018 — Oct 2018 [monthly]
Recruiting PHASE3
Status: Not Yet Recruiting → Recruiting
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Aug 2018 — Sep 2018 [monthly]
Not Yet Recruiting PHASE3
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Jul 2018 — Aug 2018 [monthly]
Not Yet Recruiting PHASE3
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Jun 2018 — Jul 2018 [monthly]
Not Yet Recruiting PHASE3
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May 2018 — Jun 2018 [monthly]
Not Yet Recruiting PHASE3
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Apr 2018 — May 2018 [monthly]
Not Yet Recruiting PHASE3
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Mar 2018 — Apr 2018 [monthly]
Not Yet Recruiting PHASE3
First recorded
Eligibility Summary
No eligibility information available.
Contact Information
- Janssen Research & Development, LLC
For direct contact, visit the study record on ClinicalTrials.gov .
Study Locations
Ancona, Italy , Arlington, United States , Austin, United States , Bologna, Italy , Bonn, Germany , Box Hill, Australia , Brussels, Belgium , Budapest, Hungary , Cagliari, Italy , Calgary, Canada and 28 more locations