Journal
JOURNAL OF CROHNS & COLITIS
Volume 15, Issue 12, Pages 2001-2010Publisher
OXFORD UNIV PRESS
DOI: 10.1093/ecco-jcc/jjab093
Keywords
Crohn's disease; long-term safety; open-label extension
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Funding
- Boehringer Ingelheim
- AbbVie
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The study demonstrated that long-term maintenance treatment with subcutaneous risankizumab 180 mg every 8 weeks was well tolerated by patients with moderate-to-severe refractory Crohn's disease, with no new safety signals observed. Efficacy outcomes were maintained, including high proportions of patients with clinical and endoscopic remission.
Background and Aims: Risankizumab, an interleukin-23 antibody, demonstrated efficacy and acceptable safety in a phase 2 study of patients with moderate-to-severe refractory Crohn's disease. This open-label extension investigated the long-term safety, pharmacokinetics, immunogenicity and efficacy of risankizumab in responders to risankizumab in the parent phase 2 study. Methods: Enrolled patients had achieved clinical response [decrease in Crohn's Disease Activity Index from baseline >= 100] without clinical remission [Crohn's Disease Activity Index <150] at Week 26, or clinical response and/or remission at Week 52 in the parent phase 2 study and received open-label subcutaneous risankizumab 180 mg every 8 weeks. Results: Sixty-five patients were enrolled, including four who had lost response in the parent study and were first reinduced with risankizumab 600 mg every 4 weeks [three infusions]. Patients received risankizumab for a median of 33 months [total: 167.0 patient-years]. The rate of serious adverse events was 24.6 events/100 patient-years; the majority were gastrointestinal in nature. Rates of serious infections, opportunistic infections and fungal infections were 4.2, 1.8, and 6.6 events/100 patient-years, respectively. No deaths, malignancies, adjudicated major adverse cardiovascular events, latent/active tuberculosis or herpes zoster were reported. Treatment-emergent anti-drug antibodies developed in eight patients [12.3%]; none were neutralizing. Efficacy outcomes were maintained during the study, including the proportions of patients [observed analysis] with clinical remission [>71%] and endoscopic remission [>42%]. Conclusions: Long-term maintenance treatment with subcutaneous risankizumab 180 mg every 8 weeks was well tolerated by patients with Crohn's disease, with no new safety signals.
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