A Study of Mirikizumab (LY3074828) in Children and Teenagers With Ulcerative Colitis (UC)

A Multicenter, Open-Label PK Study of Mirikizumab in Pediatric Patients With Moderately to Severely Active Ulcerative Colitis

This study was designed to evaluate how the body processes and removes mirikizumab. The study also evaluated safety and disease response in pediatric participants with UC taking mirikizumab. The study lasted about 52 weeks and included up to 18 visits.

Inclusion Criteria:

• Participants weighing >10 kg
• Participants must have a diagnosis of ulcerative colitis for at least 3 months before the planned start date for the study medications
• Participants must have moderately to severely active UC as defined by a Modified Mayo Score (MMS) within 14 days before the first dose of study treatment
• Participants must have evidence of UC extending proximal to the rectum
• Participants must have demonstrated an inadequate response to, a loss of response to, or an intolerance to corticosteroids, immunomodulators, Janus kinase inhibitor (JAK-inhibitor) or to biologic therapies for UC

Exclusion Criteria:

• Participants must not have a current diagnosis of Crohn's disease, inflammatory bowel disease-unclassified (indeterminate colitis), ulcerative proctitis, or primary sclerosing cholangitis
• Participants must not have had surgery to remove part of their colon
• Participants must not have current evidence of toxic megacolon
• Participants must not have received any of the following for treatment of UC: cyclosporine or thalidomide within 30 days of screening; corticosteroid enemas, corticosteroid suppositories, or topical treatment with 5-aminosalicyclic acid within 1 week of screening endoscopy
• Participants must not have had an inadequate response to Interleukin-12 p40 subunit antibody (anti-IL12p40) (e.g. ustekinumab) or had prior exposure to anti-IL-23p19 antibodies (e.g. risankizumab, brazikumab, guselkumab or tildrakizumab)