ArticleFrontiers in pharmacology2025
Rituximab in PR3-ANCA positive patients with moderately to severely active ulcerative colitis: a multicenter real-world pilot study.
Article in Frontiers in pharmacology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background and aims: Patients with ulcerative colitis (UC) and PR3-ANCA positivity often show a poor response to infliximab (IFX). Our objective was to compare the effectiveness and safety of rituximab (RTX) and IFX in moderately-to-severely active PR3-ANCA positive (PR3-ANCA+) UC patients. This study represents the first exploration of biomarker-guided therapy (PR3-ANCA+) in moderately-severely active UC, aiming to generate hypothesis-driven evidence for future randomized trials. Methods: This retrospective, multicenter, real-world study focused on a rare biomarker-defined subgroup (PR3-ANCA + UC) and was conducted across three medical centers in Hubei, China. Moderately to severely active UC patients with PR3-ANCA+ were assigned to the RTX group (n = 12) and the IFX group (n = 26) based on biological therapy received. Endpoints at week 22 included clinical remission (primary), clinical response, endoscopic response, improvement, and remission. Safety endpoints centered on opportunistic infections and drug-related adverse events. Inverse probability of treatment weighting (IPTW) and multifactorial logistic regression analysis (MLRS) were used to reduce confounding effects. Results: Pre-IPTW, compared with IFX, RTX significantly increased the rates of clinical remission, clinical response, endoscopic response, endoscopic improvement, and endoscopic remission by 60.25% (95%CI: 33.68%-86.82%, Conclusion: In moderately to severely active UC patients with PR3-ANCA+, RTX showed better effectiveness than infliximab (IFX), with a similar safety profile.
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