B0377 - Mirikizumab Significantly Improves Abdominal Pain in Patients With Moderately-to-Severely Active Ulcerative Colitis: Results From the Phase 3 LUCENT-1 Induction and LUCENT-2 Maintenance Studies
Mayo Clinic College of Medicine and Science Rochester, Minnesota
Edward V. Loftus, MD, FACG1, Theresa Hunter Gibble, PhD2, Alison Potts Bleakman, MA, PhD2, Xingyuan Li, PhD2, Nathan Morris, PhD2, Emily Hon, MD2, Vipul Jairath, MBChB, DPhil3 1Mayo Clinic College of Medicine and Science, Rochester, MN; 2Eli Lilly and Company, Indianapolis, IN; 3Western University, London, ON, Canada
Introduction: Abdominal pain (AP) is a frequent and burdensome symptom in patients (pts) with ulcerative colitis (UC).1 Mirikizumab (miri; IL-23p19 inhibitor) demonstrated efficacy vs placebo (PBO) in adult pts with moderately-to-severely active UC in randomized, double-blind, phase 3 LUCENT-1 (induction/NCT03518086) and LUCENT-2 (maintenance/NCT03524092) studies.2.3 Here, we report the effect of miri vs PBO on AP.
Methods: In the induction study, pts (N=1162) were randomized 3:1 to receive intravenous (IV) miri 300 mg or PBO every 4 weeks (Q4W). Pts who achieved clinical response with miri at W12 (N=544) of induction were re-randomized 2:1 to subcutaneous (SC) miri 200 mg or PBO Q4W through W40 in the maintenance study. Pts recorded “worst AP in the past 24 hours” each day using an 11-point AP Numeric Rating Scale (NRS; 0 = no pain; 10 = worst possible pain) on an electronic diary. AP improvement (AP NRS score ≥30% improvement from baseline [BL] in pts with BL AP NRS ≥3) was evaluated. The Cochran-Mantel-Haenszel test was used to compare the proportion of pts achieving AP improvement with missing data imputed as nonresponse.
Results: As early as W4 (miri 43.0% vs PBO 33.7%; risk difference [95% CI]: 9.7 [2.8–16.6], p=0.007) of the induction study, a significant reduction from BL of at least 30% in AP NRS score was observed in the miri-treated pts vs PBO through W12 (66.4% vs 49.2%; 17.4 [10.3–24.6], p< 0.001). In the maintenance study, a greater percentage of miri-treated pts maintained AP NRS improvement compared to PBO. The separation started at W16 (79.2% vs 69.2%; 9.0 [0.5–17.5], p=0.034) and sustained through W40 (76.2% vs 47.2%; 27.4 [18.3–36.4], p< 0.001; Figure).
Discussion: Miri provided early (W4) and sustained improvement (through W40) of AP compared with PBO in pts with moderately-to-severely active UC.
1Dulai PS, et al. Development of the symptoms and impacts questionnaire for Crohn's disease and ulcerative colitis. Aliment Pharmacol Ther. 2020;51(11):1047–66.
2G D’Haens, et al. Efficacy and safety of mirikizumab as induction therapy in patients with moderately to severely active Ulcerative Colitis: Results from the Phase 3 LUCENT-1 study. J Crohn's Colitis. 2022;16:i028–29.
3M Dubinsky, et al. Efficacy and safety of mirikizumab as maintenance therapy in patients with moderately to severely active ulcerative colitis: results from the phase 3 LUCENT-2 study. Abs. 867e. Digestive Disease Week, May 21-24, 2022.
Figure: Figure. The proportion of patients with AP NRS ≥30% improvement at A. induction and B. maintenance in patients with Abdominal Pain NRS score ≥3 at induction baseline. *p<0.05; **p<0.001 vs. placebo Weekly measures were calculated by averaging data from daily diary entries of AP NRS for a 7-day period. Baseline value for both induction and maintenance was calculated from daily diary entries the week prior to W0 of induction. Abbreviations: AP NRS, Abdominal Pain Numeric Rating Scale; IV, intravenous; miri, mirikizumab; PBO, placebo; SC, subcutaneous