P465 Upadacitinib is effective and safe for the treatment of ulcerative colitis and Crohn’s disease: 1-year prospective real-world experience

Background Upadacitinib (UPA) is a novel selective Janus kinase 1 inhibitor that has shown efficacy and received approval for the treatment of moderate-to-severe ulcerative colitis (UC) and Crohn's disease (CD). We previously reported a large real-world experience of UPA induction in UC and CD (Friedberg, CGH. 2023). Here we report our 1-year real-world experience. Methods This is a prospectively collected study of clinical outcomes of UPA treatment in patients with UC and CD using predetermined intervals at weeks 0, 2, 4, 8, then every 3 months until week 52 as part of a formalized treatment protocol at our institution. We used the Simple Clinical Colitis Activity Index and the Harvey-Bradshaw index, as well as C-reactive protein and faecal calprotectin to assess efficacy, and also recorded treatment-related adverse events and serious adverse events. Results 110 patients were initiated on UPA and followed for a one-year period (CD=57, UC=44, IBDU=5, pouchitis=4). 109/110 (99%) were biologic exposed and 31/110 (28.2 %) were tofacitinib exposed. 99/110 (90%) were initiated on UPA for luminal disease (Table 1). 54 patients remained on UPA therapy at 1 year. In UC: week 8 clinical response and remission was 24/47 (51.1%), 39/47 (83%), respectively; week 26 clinical response and remission was 20/34 (58.8%), 24/34 (70.6%), respectively; 52 week clinical response and remission was 17/30 (56.7%), 29/30 (96.7%), respectively. In CD: week 8 clinical response and remission was 14/32 (43.8%), 25/32 (78.1%%), respectively; week 26 clinical response and remission was 9/22 (40.9%), 15/22 (68.2%), respectively; 52 week clinical response and remission was 10/17 (58.8%), 13/17 (76.5%), respectively. 56 patients discontinued UPA prior to the 1 year follow-up, 13 were due to adverse events[DR1] . The most commonly experienced AEs leading to discontinuation was dermatological side effects (CD=2, UC=2). One instance of shingles occurred leading to discontinuation. No other serious infections or serious adverse events including VTE, MACE, or malignancies occurred. Conclusion In this large 1-year real-world experience in medically resistant patients with UC or CD, we report that UPA is both effective and safe, including in those who had prior exposure to tofacitinib.