A Study to Evaluate the Efficacy, Safety, and Pharmacokinetics of Subcutaneously Administered Guselkumab for the Treatment of Chronic Plaque Psoriasis in Pediatric Participants (PROTOSTAR)

Janssen (J&J Innovative Medicine)

Status and phase: Active, not recruiting; Phase 3

Conditions: Psoriasis

Treatments: Drug: Placebo for guselkumab; Drug: Etanercept; Drug: Guselkumab

Study type: Interventional

Funder types: Industry

Identifiers

NCT03451851

CR108452

2017-003053-42 (EudraCT Number)

CNTO1959PSO3011 (Other Identifier)

2023-503378-19-00 (Registry Identifier)

Details and patient eligibility

About

The purpose of this study is to evaluate the efficacy and safety of guselkumab in pediatric participants aged greater than or equal to 6 through less than 18 years with chronic plaque psoriasis.

Enrollment: 120 patients

Sex: All

Ages: 6 to 17 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Have a diagnosis of chronic plaque-type psoriasis for at least 6 months (with or without psoriatic arthritis [PsA]), prior to first administration of study intervention, defined as having at screening and baseline, Investigator Global Assessment (IGA) greater than or equal to (>=) 3, Psoriasis Area and Severity Index (PASI) >=12, >=10% body surface area (BSA) involvement and at least one of the following: very thick lesions, clinically relevant facial, genital, or hand/ foot involvement, PASI>=20, >20% BSA involvement, or IGA=4
• Be a candidate for phototherapy or systemic treatment of plaque psoriasis (either naive or history of previous treatment)
• Have plaque psoriasis considered by the investigator as inadequately controlled with phototherapy and/or topical therapy after an adequate dose and duration of therapy
• Be considered, in the opinion of the investigator, a suitable candidate for etanercept therapy, according to their country's approved Enbrel product labeling
• Be otherwise healthy on the basis of physical examination, medical history, and vital signs performed at screening. Any abnormalities, must be consistent with the underlying illness in the study population and this determination must be recorded in the participant's source documents and initialed by the investigator
• Must have acceptable evidence of immunity to varicella and measles, mumps, and rubella (MMR), which includes any one of the following: documentation of age-appropriate vaccination that includes both doses of each vaccine (unless local guidelines specify otherwise) or documentation of past infection by a healthcare provider or in the absence of previous 2 criteria, participants must have positive protective antibody titers to these infection prior to the first administration of study intervention. For participants who have not completed the recommended vaccination schedule for varicella and MMR, and the subsequent vaccination falls within the next 4 years, an accelerated vaccination schedule must be completed prior to study enrollment if available and required or strongly recommended for the location. If varicella or MMR vaccines are utilized, it is necessary for 2 weeks to elapse between the vaccination and receipt of study intervention

Exclusion criteria

• Currently has nonplaque forms of psoriasis (example, erythrodermic, guttate, or pustular)
• Has current drug-induced psoriasis (example, a new onset of psoriasis or an exacerbation of psoriasis from beta blockers, calcium channel blockers, or lithium)
• Has previously received guselkumab or etanercept
• Has a history of chronic or recurrent infectious disease, including but not limited to chronic renal infection, chronic chest infection (example, bronchiectasis), recurrent urinary tract infection (recurrent pyelonephritis or chronic non-remitting cystitis), fungal infection (mucocutaneous candidiasis), or open, draining, or infected skin wounds or ulcers
• Has a known history of lymphoproliferative disease, including lymphoma; a history of monoclonal gammopathy of undetermined significance (MGUS); or signs and symptoms suggestive of possible lymphoproliferative disease, such as lymphadenopathy or splenomegaly

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Quadruple Blind

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120 participants in 4 patient groups, including a placebo group

Part 1 Group 1: Guselkumab

Experimental group

Description:

Participants in Part 1a (age greater than or equal to (\>=) 12 - less than (\<) 18 years) will receive a weight-based dose of guselkumab subcutaneously (SC) at Weeks 0, 4, and 12. Participants who are PASI 90 responders at Week 16 will not receive any additional doses of guselkumab until they lose \>=50% of their Week 16 PASI response, then they receive 1 dose guselkumab, followed by a dose 4 weeks later, and every 8 weeks (q8w) thereafter through Week 52. Participants who are PASI 90 non-responders at Week 16 will receive a placebo injection at Week 16 and continue to receive guselkumab q8w from Week 20 through Week 52. Participants who are eligible and willing to continue guselkumab may enter the Long Term Extension (LTE) Phase of the study. Part 1b (age \>= 6 - \<12 years) will follow the same dosing and commence after Part 1a data review.

Treatment:

Drug: Guselkumab

Drug: Placebo for guselkumab

Part 1 Group 2: Placebo for Guselkumab

Placebo Comparator group

Description:

Participants in Part 1a (age \>= 12 - \<18 years) will receive placebo for guselkumab administered SC at Weeks 0, 4, and 12. Participants who are PASI 90 responders at Week 16 will not receive any additional doses of study intervention until they lose \>=50% of their Week 16 PASI response, at which time they will receive a weight-based guselkumab SC dose, followed by a dose 4 weeks later, and q8w thereafter through Week 52. Participants who are PASI 90 non-responders at Week 16 will receive a weight-based guselkumab dose at Weeks 16 and 20, followed by q8w dosing thereafter through Week 52. Participants who are eligible and willing to continue guselkumab treatment, may enter the LTE phase of the study. Part 1b (age \>= 6 - \<12 years) will follow the same dosing and commence after Part 1a data review.

Treatment:

Drug: Guselkumab

Drug: Placebo for guselkumab

Part 1 Group 3: Etanercept

Active Comparator group

Description:

Participants in Part 1a (age \>= 12 - \<18 years) will receive weight-based etanercept dose up to 50 milligram SC weekly through Week 15. Participants who elect to continue in the study will receive a weight-based guselkumab dose at Weeks 20 and 24, followed by q8w dosing thereafter through Week 48. Participants who are eligible and willing to continue guselkumab treatment, may enter the LTE phase of the study. Part 1b (age \>= 6 - \<12 years) will follow the same dosing and commence after Part 1a data review.

Treatment:

Drug: Guselkumab

Drug: Etanercept

Part 2: Guselkumab

Experimental group

Description:

Participants will receive a weight-based dose of open-label guselkumab SC at Weeks 0, 4 and q8w thereafter through Week 52. Participants who are eligible and willing to continue guselkumab treatment, may enter the LTE of the study and continue to receive guselkumab at Week 52 and q8w thereafter.

Treatment:

Drug: Guselkumab