PARIS, France I July 22, 2025 I
Abivax SA (Euronext Paris: FR0012333284 – ABVX / Nasdaq: ABVX) (“Abivax” or the “Company”), a clinical-stage biotechnology company focused on developing therapeutics that harness the body’s natural regulatory mechanisms to stabilize the immune response in patients with chronic inflammatory diseases, today announced positive topline results from its Phase 3 ABTECT-1 (Study 105) and ABTECT-2 (Study 106) 8-week induction trials evaluating its oral, first-in-class miR-124 enhancer, obefazimod (ABX464), in adult patients with moderately to severely active ulcerative colitis (“UC”).
Marc de Garidel, Chief Executive Officer of Abivax, commented
:
“Today marks a significant milestone for Abivax, and more importantly, for the ulcerative colitis community. The strength of these results reinforces our belief in obefazimod, our first-in-class miR-124 enhancer, and its potential to become a transformative new treatment modality for patients with UC. Pending successful results from the 44-week maintenance trial, we are preparing to submit a New Drug Application to the FDA in the second half of 2026. We would like to thank the patients who participated in the trials as well as the investigators and staff at over 600 sites in 36 countries who contributed to the landmark trials.”
David Rubin, M.D., Chief, Section of Gastroenterology, Hepatology and Nutrition, and Director of the Inflammatory Bowel Disease Center at the University of Chicago Medicine, commented:
“The results of the two induction studies for this first-in-class therapy for ulcerative colitis are both statistically significant and clinically meaningful. Based on the impressive safety and tolerability profile demonstrated to date, and pending similar results in the maintenance study, obefazimod will offer a welcome new option for those who suffer from ulcerative colitis, both as an attractive early option as well as for those who have had inadequate response or loss of response to prior advanced therapies.”
Topline Results
The ABTECT-1 and ABTECT-2 induction trials are global, multicenter, randomized, double-blind, placebo-controlled trials assessing once-daily oral administration of obefazimod at 25 mg or 50 mg doses in adult patients with moderately to severely active UC. Eligible participants had inadequate response, loss of response, or intolerance to conventional and/or advanced therapies. ABTECT-1 and ABTECT-2 were conducted simultaneously and have enrolled 1,275 patients from over 600 participating clinical trial sites in 36 countries with the intent to satisfy regulatory requirements globally. The ABTECT Program is one of the largest Phase 3 ulcerative colitis trials ever conducted and includes the largest population of patients with inadequate response to JAK inhibitor therapy.
Results from the ABTECT-1 and ABTECT-2 trials demonstrated that obefazimod met its FDA primary endpoint of clinical remission at Week 8 in the 50 mg once-daily dose regimens for both trials. Individually, ABTECT-1 showed a placebo-adjusted clinical remission rate of 19.3% (p<0.0001) and ABTECT-2 demonstrated 13.4% (p=0.0001), each at the 50 mg once-daily dose, with all key secondary efficacy endpoints being met.
The 25 mg once-daily dose of obefazimod achieved the FDA primary endpoint of clinical remission at Week 8 in ABTECT-1 demonstrating a placebo-adjusted remission rate of 21.4%. While the 25 mg dose did not achieve statistical significance for this endpoint in ABTECT-2, it achieved a pooled placebo-adjusted clinical response rate of 28.6%, indicating a strong signal for these patients to achieve clinical remission with extended treatment in the maintenance trial.
The safety profile of obefazimod remained consistent with prior clinical experience. No new safety signals were observed in either trial and the treatment was generally well tolerated across both dose groups.
Ongoing ABTECT Phase 3 Maintenance Trial:
Fabio Cataldi, M.D. Chief Medical Officer, stated
:
“The exemplary results from the ABTECT induction trials reflect our dedication to scientific rigor and disciplined execution. We are thrilled to report outcomes that not only met but exceeded the bar set by our Phase 2b trial, a remarkable achievement that speaks volumes about the quality of our development program. We look forward to presenting more detailed analysis, including patients with inadequate response to prior JAK therapy at an upcoming medical conference.”
Please note that the Company will be postponing reporting H1 2025 financial results that were originally scheduled for August 11, 2025 to September 8, 2025. Preliminary cash and cash equivalents as of June 30, 2025, were approximately $71.4M or EUR 61.0M (unaudited)
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About the ABTECT Ulcerative Colitis Program
The global obefazimod ulcerative colitis program evaluates more than 1,200 patients with moderately to severely active ulcerative colitis across three pivotal trials. These studies include assessments of efficacy and safety of obefazimod. More information on these trials can be found at www.clinicaltrials.gov (NCT05507203, NCT05507216, NCT05535946).
About Abivax
Abivax is a clinical-stage biotechnology company focused on developing therapeutics that harness the body’s natural regulatory mechanisms to stabilize the immune response in patients with chronic inflammatory diseases. Based in France and the United States, Abivax’s lead drug candidate, obefazimod (ABX464), is in Phase 3 clinical trials for the treatment of moderately to severely active ulcerative colitis.
SOURCE:
Abivax