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Peficitinib, an Oral Janus Kinase Inhibitor, in Moderate-to-Severe Ulcerative Colitis: Results From a Randomized, Phase 2 Study.
Journal of Crohn's & Colitis 2018 June 16
Background and Aims: Janus kinase (JAK) inhibitors have shown efficacy in ulcerative colitis (UC). We studied the dose-response, efficacy, and safety of peficitinib, an oral JAK inhibitor, in patients with moderate-to-severe UC.
Methods: In this Phase 2b, dose-ranging trial, we evaluated peficitinib at 25mg once daily (qd), 75mg qd, 150mg qd, and 75mg twice daily versus placebo for efficacy and safety in 219 patients with moderate-to-severe UC. The primary outcome was peficitinib dose-response at Week 8 with response assessed using Mayo score change from baseline. Secondary endpoints were clinical response, clinical remission, mucosal healing, change from baseline in Inflammatory Bowel Disease Questionnaire (IBDQ), and normalization of inflammatory biomarkers at Week 8; other secondary endpoints were treatment response through Week 16 and through Week 32 for patients in clinical response at Week 8. Safety was assessed through Week 36 or 4 weeks after the last dose.
Results: A statistically significant peficitinib dose-response was not demonstrated at Week 8, although a numerically greater proportion of patients receiving peficitinib ≥75mg qd achieved clinical response, remission, and mucosal healing at Week 8, supported by IBDQ improvement and inflammatory biomarker normalization. Treatment-emergent adverse event (TEAE) rates reported through Week 8 and the final safety visit were higher in the combined peficitinib group than placebo; patients receiving doses of ≥75mg qd peficitinib reported TEAEs more frequently.
Conclusions: While no dose-response in patients with moderate-to-severe UC was demonstrated with peficitinib, evidence of efficacy was suggested at doses ≥75mg qd. The safety profile of peficitinib was consistent with current information.
Clinical Trials: ClinicalTrials.gov NCT01959282.
Methods: In this Phase 2b, dose-ranging trial, we evaluated peficitinib at 25mg once daily (qd), 75mg qd, 150mg qd, and 75mg twice daily versus placebo for efficacy and safety in 219 patients with moderate-to-severe UC. The primary outcome was peficitinib dose-response at Week 8 with response assessed using Mayo score change from baseline. Secondary endpoints were clinical response, clinical remission, mucosal healing, change from baseline in Inflammatory Bowel Disease Questionnaire (IBDQ), and normalization of inflammatory biomarkers at Week 8; other secondary endpoints were treatment response through Week 16 and through Week 32 for patients in clinical response at Week 8. Safety was assessed through Week 36 or 4 weeks after the last dose.
Results: A statistically significant peficitinib dose-response was not demonstrated at Week 8, although a numerically greater proportion of patients receiving peficitinib ≥75mg qd achieved clinical response, remission, and mucosal healing at Week 8, supported by IBDQ improvement and inflammatory biomarker normalization. Treatment-emergent adverse event (TEAE) rates reported through Week 8 and the final safety visit were higher in the combined peficitinib group than placebo; patients receiving doses of ≥75mg qd peficitinib reported TEAEs more frequently.
Conclusions: While no dose-response in patients with moderate-to-severe UC was demonstrated with peficitinib, evidence of efficacy was suggested at doses ≥75mg qd. The safety profile of peficitinib was consistent with current information.
Clinical Trials: ClinicalTrials.gov NCT01959282.
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