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A 52-week Randomized, Double-blind, Placebo-controlled, Multi-center Phase 2b Study With a 52-week Blinded Extension and an Optional Open-label Extension - Assessing Safety and Efficacy of Frexalimab, a CD40L-antagonist Monoclonal Antibody, for Preservation of Pancreatic β-cell Function in Adults and Adolescents With Newly Diagnosed Type 1 Diabetes on Insulin Therapy

Trial Profile

A 52-week Randomized, Double-blind, Placebo-controlled, Multi-center Phase 2b Study With a 52-week Blinded Extension and an Optional Open-label Extension - Assessing Safety and Efficacy of Frexalimab, a CD40L-antagonist Monoclonal Antibody, for Preservation of Pancreatic β-cell Function in Adults and Adolescents With Newly Diagnosed Type 1 Diabetes on Insulin Therapy

Status: Recruiting
Phase of Trial: Phase II

Latest Information Update: 10 Apr 2026

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At a glance

  • Drugs Frexalimab (Primary) ; Insulin (Primary)
  • Indications Type 1 diabetes mellitus
  • Focus Proof of concept; Therapeutic Use
  • Acronyms FABULINUS
  • Sponsors Sanofi

Most Recent Events

  • 19 Dec 2025 Planned End Date changed from 11 Aug 2031 to 29 Oct 2030.
  • 19 Dec 2025 Planned primary completion date changed from 30 Apr 2027 to 28 Apr 2027.
  • 20 Nov 2025 Planned End Date changed from 27 Oct 2028 to 11 Aug 2031.

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