Safety and Efficacy of AJM300, an Oral Antagonist of α4 Integrin, in Induction Therapy for Patients With Active Ulcerative Colitis

Gastroenterology
Naoki YoshimuraAJM300 Study Group

Abstract

AJM300 is an orally active small-molecule antagonist of the α4 integrin subunit. We performed a randomized trial to investigate the efficacy and safety of AJM300 in patients with active ulcerative colitis (UC). In a double-blind, placebo-controlled, phase 2a study, 102 patients with moderately active UC (Mayo Clinic scores of 6-10, endoscopic subscores ≥2, and rectal bleeding subscores ≥1) who had inadequate response or intolerance to mesalamine or corticosteroids were randomly assigned to receive AJM300 (960 mg) or placebo 3 times daily for 8 weeks. The primary end point was a clinical response at week 8, defined as a decrease in Mayo Clinic score of at least 3 points and a decrease of at least 30% from baseline, with a decrease in the rectal bleeding subscore of at least 1 point or an absolute rectal bleeding subscore of 0 or 1. Clinical response rates were 62.7% and 25.5% at week 8 in the AJM300 group and placebo group, respectively (odds ratio [OR] = 5.35; 95% confidence interval [CI]: 2.23-12.82; P = .0002). Rates of clinical remission (Mayo Clinic score ≤2 and no subscore >1) were 23.5% and 3.9% in the AJM300 group and placebo groups, respectively (OR = 7.81; 95% CI: 1.64-37.24; P = .0099), and rates of mucosal healing (e...Continue Reading

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