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Abivax inflammatory bowel drug shows benefit in relapsed and non-responding patients

The update showed 37.2% of previously nonresponsive patients reached remission after 44 weeks, while expanded safety data found cancer rates in line with expectations.

  • Abivax shares jumped 25% on Tuesday after the Paris-based biotech released fresh Phase 3 ABTECT maintenance trial results showing malignancies within expected background rates for its lead drug, obefazimod.
  • Investor sentiment had soured after earlier maintenance trial data revealed cancer cases among patients taking the highest dose, causing shares to crash around 44% on June 2.
  • The latest results showed 37.2% of patients who initially failed to respond achieved clinical remission after 44 weeks, while 34.5% showed bowel-lining healing and 45.5% regained remission at the 50 mg dose.
  • Jefferies analysts called the update "supportive," but questioned whether findings satisfy investors, citing "cancer risk may be tough to discount, sparse catalyst path, cash needs, catalyst path ex-M&A."
  • Chief Executive Marc de Garidel affirmed Abivax remains on track to submit a New Drug Application later this year, while the company evaluates the drug for Crohn disease with mid-2027 trial results expected.
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Reuters broke the news in New York, United States on Monday, June 29, 2026.
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