Long-Term Extension Study Evaluating Safety of Guselkumab Injections in Children with Crohns Disease, Ulcerative Colitis, or Juvenile Psoriatic Arthritis

What this Trial Is About

Researchers are evaluating the long-term safety of subcutaneous guselkumab injections in children with moderately to severely active ulcerative colitis, Crohns disease, or juvenile psoriatic arthritis. This Phase 3 study focuses on pediatric participants who have previously been treated with guselkumab and will continue therapy in this extension study to monitor safety over an extended period. Participants who completed dosing in one of three primary pediatric guselkumab studies and are deemed by their investigator to benefit from continued treatment will join this long-term extension. Guselkumab is administered as a subcutaneous injection either every 8 weeks or every 4 weeks, depending on prior study assignment and clinical status. Some participants may switch dosing frequency once during the extension before unblinding, after which dosing aligns with their original regimen. Dose adjustments are restricted based on the primary study they came from. During the study, participants will receive guselkumab injections regularly and be monitored for treatment-emergent adverse events for up to nearly seven years. Researchers will assess safety outcomes through ongoing clinical evaluations over this time. Parents or legal representatives provide consent for children to participate, and children capable of understanding the study will give assent. The total participation duration may extend up to six years and nine months, allowing long-term safety data collection.

A Long-term Extension (LTE) Study of Guselkumab in Pediatric Participants