P688 Effect of golimumab induction therapy on histologic disease profile in patients with moderate to severe ulcerative colitis: Results from the randomised, placebo-controlled Phase 3 PURSUIT-SC trial

Abstract

Abstract Background Histologic improvement is an emerging goal in ulcerative colitis (UC) management. We previously demonstrated in the 6-week, multicentre, randomised, placebo-controlled, double-blind Program of Ulcerative colitis Research Studies Utilising an Investigational Treatment [PURSUIT-SC] Phase 3 trial that SC induction therapy with the tumour necrosis factor-α inhibitor, golimumab (GLM), led to statistically significant and clinically meaningful improvements in the signs and symptoms of UC compared with placebo, including clinical remission, mucosal healing, and improved health-related QoL, in patients with moderate to severe active UC.1 In the present report, we explored the histologic effects of GLM induction therapy in PURSUIT-SC by examining data from a prespecified histology sub-study. Methods The Phase 3 PURSUIT-SC trial evaluated the safety and efficacy of induction therapy with GLM in 774 patients with moderate to severe UC disease activity (defined as Mayo scores of 6–12, including an endoscopic subscore of ≥ 2). Patients were randomised 1:1:1 to receive SC induction treatment with placebo at Weeks 0 and 2, GLM 200 mg at Week 0 followed by 100 mg at Week 2 (GLM 200–>100 mg), or GLM 400 mg at Week 0 followed by 200 mg at Week 2 (GLM 400–>200 mg). Rectal biopsies were collected during endoscopy at screening and Week 6 in those randomised patients who consented to participate in the histology sub-study (N=98). During the screening endoscopy, two adjacent biopsies were collected 15 to 20 cm beyond the anal verge in an area that was most representative of the inflammation observed. At Week 6, two additional biopsies were to be obtained from the same location biopsied at screening. Biopsies were graded using the Geboes Score (GS) by a single expert gastrointestinal histopathologist, who was blinded to subject, treatment and study visit. The GS comprises seven histologic grades assessing structural changes and inflammatory disease activity. Higher GS grade scores indicate more severe histologic disease. Results Evaluable biopsy data were available in 89 patients (placebo, n = 30; GLM 200–>100 mg, n = 30; GLM 400–>200 mg, n = 29). At Week 6, compared with placebo, treatment with GLM induction therapy led to a decrease in the proportion of biopsies with GS grade scores of > 1 and an increase in the proportion of biopsies with GS grade scores of ≤ 1, with the greatest improvements being observed in the GLM 400–>200 mg group (figure). Conclusion The findings of this exploratory histologic sub-study in the PURSUIT-SC trial suggest that GLM induction therapy led to an improvement in histologic disease activity compared with placebo in patients with moderate-to-severe UC. Reference