P1178 A multi-centred retrospective cohort study comparing JAK inhibitor therapies in moderate to severe ulcerative colitis
Authors: Kumar A , Baxter J , Rimmer P , Noble B , Makki M , Chikhlia A , Cheesbrough J , Disney B , Muir J , Karova M , Butterworth J , Bower J , Sagar N , Al-Talib I , Nahal J , Hatta A , Ali N , Sagar V , Varyani F , Smith S , Bourne S , Hsu Y K , Eltahir A , de silva S , Harvey P 
Published: January 2025

Abstract

Background
Tofacitinib, filgotinib and upadacitinib are JAK inhibitors (JAKi) that are licensed for treatment in moderate to severe ulcerative colitis (UC). Whilst these drugs have demonstrated efficacy against placebo, there is no head-to-head data. This study aims to compare the clinical efficacy between these drugs.

Methods
This is a multi-centred, retrospective cohort study with data collected from January 2018 to June 2024. Patients with UC were recruited on their first JAKi, irrespective of previous advanced therapies. Clinical remission (faecal calprotectin (FCP) &lt;250, Mayo £1, UCEIS £1, pMayo £2, SCCAI £2) and response (50% reduction in FCP from baseline, reduction in partial Mayo or UCEIS by 3 or more, or sustained &lt;3) was measured at 3- and 6-months. If a patient stopped taking JAKi, they were considered to have failed both response and remission. Data was non-parametric and outcome measures were compared using Chi-squared tests.

Results
There was a total of 266 patients included in the final analysis. 70 (26%) were on upadacitinib, 47 (18%) on filgotinib and 149 (56%) on tofacitinib (Table 1). At least 87% (129/149) on tofacitinib had exposure to a previous biologic compared to 80% (56/70) for upadacitinib and 66% (31/47) for filgotinib. At 3-months, clinical response in upadacitinib, filgotinib and tofacitinib was demonstrated in 83%, 74% and 75% patients, respectively and clinical remission was seen in 69%, 64% and 52%, respectively. At 6-months, clinical response was demonstrated in 79%, 65% and 63%, respectively and remission was seen in 75%, 61% and 51%, respectively. Upadacitinib demonstrated significantly higher 3-months remission rate (p=0.019) and 6-months response (p=0.010) and remission rates (p= 0.001) compared to tofacitinib. In the bio-exposed cohorts, upadacitinib demonstrated greater 6-months remission rates (71%) compared to 64% on filgotinib (p=NS) and 52% tofacitinib (p= 0.022). In bio-naïve cohorts (n=50), upadacitinib demonstrated greater 6-months remission rates (93%) compared to 56% on filgotinib (p=0.024) and 50% tofacitinib (p= 0.009). Combining the JAKi, 90% of patients were not on steroids at 3-months and 94% were not on steroids at 6-months. A total of 26 patients had a colectomy at the time of their JAKi, 17 on tofacitinib, 5 on filgotinib and 4 on upadacitinib.

Conclusion
This study demonstrates that upadacitinib is more likely to achieve 3- and 6-month remission compared to tofacitinib. In a small sub-group of bio-naïve patients Upadacitinib was more likely to achieve 6-month remission compared to filgotinib and tofacitinib. JAKi were associated with minimal adverse events and importantly, the efficacy of JAKi does not appear diminished by prior biologic use.