Clinical trial Recruiting at 28 sites Phase 3 Interventional Ages 16 to 70

Del-brax (AOC 1020) intravenous treatment for people with FSHD

Official title: A Randomized, Double-blind, Placebo-controlled, Phase 3 Study to Evaluate the Efficacy and Safety of Intravenous AOC 1020 for the Treatment of Facioscapulohumeral Muscular Dystrophy (FSHD)

Run by Avidity Biosciences, Inc. · NCT07038200 · Data updated 2026-11-12

This study will try regular IV infusions of del-brax (AOC 1020) in adults with FSHD to see if it slows muscle weakness and helps preserve walking ability.

More Facioscapulohumeral Muscular Dystrophy trials

Quick facts

PhasePhase 3
Study typeInterventional
Ages16 Years to 70 Years
SexAll
Enrollment200 (estimated)
SponsorAvidity Biosciences, Inc.
Industry-sponsored
Locations46 sites (Orange, California and 45 other locations)
StatusRecruiting
StartedJune 10, 2025
Main results expectedMay 2028
Study endsJuly 2028
Registry record updatedJuly 27, 2026
Trial IDNCT07038200 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults with a clinical and genetic diagnosis of FSHD1 or FSHD2 who can walk independently for at least 10 meters and meet the study's muscle strength and safety criteria are ideal candidates.

Probably not a fit

People who cannot walk independently for 10 meters, who have disqualifying lab abnormalities, are pregnant or breastfeeding, or who recently received other oligonucleotide therapies may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a randomized, double-blind, placebo-controlled Phase 3 trial testing intravenous del-brax (AOC 1020) given every 6 weeks for 72 weeks (13 doses) after up to 6 weeks of screening. Participants are randomized to del-brax or placebo and undergo clinical assessments through a final visit at Week 78, with eligible participants offered an open-label extension thereafter. Safety and tolerability will be reviewed periodically by an independent data monitoring committee. The study includes on-site IV infusions and functional outcome measures, and excludes people with recent oligonucleotide treatment or certain abnormal labs or blood pressure.

Why it matters

Potential benefit: If successful, del-brax could slow disease progression and help maintain muscle strength and walking function in people with FSHD.

How similar studies have gone: Early-phase work with del-brax and other antibody-oligonucleotide conjugates has shown preliminary safety and target engagement, but large Phase 3 proof of clinical benefit in FSHD has not yet been established.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Clinical and genetic diagnosis of FSHD1 or FSHD2
* Ability to walk independently at pre-specified walking speed (orthoses and ankle braces allowed) for at least 10 meters at screening
* Adequate muscle strength based on QMT composite score

Exclusion Criteria:

* Breastfeeding, pregnancy, or intent to become pregnant during the study
* Unwilling or unable to comply with contraceptive requirements
* Abnormal lab values, conditions or diseases that would make the participant unsuitable for the study
* Blood Pressure \> 140/90 mmHg at Screening
* Treatment with another investigational drug or biological agent within 1 month of Screening or 5 half-lives of the drug, whichever is longer
* Treatment with an oligonucleotide within 9 months of Screening

Where it's running

  • University of Calgary - Cumming School of Medicine
    Calgary, Alberta, Canada
    Recruiting
  • University of Alberta Hospital
    Edmonton, Alberta, Canada
    Recruiting
  • The Ottawa Hospital
    Ottawa, Ontario, Canada
    Recruiting
  • Genge Partners Inc
    Montreal, Quebec, Canada
    Recruiting
  • Rigshospitalet
    Copenhagen, Denmark
    Recruiting
  • AP-HP Hopital Pitie-Salpetriere
    Paris, France
    Recruiting
Show 40 more locations
  • Universitaetsklinikum Bonn
    Bonn, Germany
    Recruiting
  • Georg-August-Universitaet Goettingen Stiftung oeffentlichen Rechts Universitaetsmedizin Goettingen
    Göttingen, Germany
    Recruiting
  • Klinikum der Ludwig-Maximilians-Universitaet Muenchen
    München, Germany
    Recruiting
  • Universitaetsklinikum Ulm
    Ulm, Germany
    Recruiting
  • Fondazione Serena ETS - Centro Clinico NeMO Milano
    Milan, Italy
    Recruiting
  • Azienda Ospedaliero Universitaria Pisana
    Pisa, Italy
    Recruiting
  • Azienda Ospedaliero-Universitaria Sant'Andrea
    Roma, Italy
    Recruiting
  • Fondazione Policlinico Universitario A. Gemelli IRCCS - Universita Cattolica del Sacro Cuore
    Roma, Italy
    Recruiting
  • National Hospital Organization Osaka Toneyama Medical Center
    Osaka, Japan
    Recruiting
  • The University of Osaka Hospital
    Osaka, Japan
    Recruiting
  • National Hospital Organization Sendai Nishitaga Hospital
    Sendai, Japan
    Recruiting
  • National Center of Neurology and Psychiatry
    Tokyo, Japan
    Recruiting
  • Academisch Ziekenhuis Leiden
    Leiden, Netherlands
    Recruiting
  • Stichting Radboud Universitair Medisch Centrum
    Nijmegen, Netherlands
    Recruiting
  • Hospital Universitari de Bellvitge
    Barcelona, Spain
    Recruiting
  • Hospital Universitario Vall d'Hebron
    Barcelona, Spain
    Recruiting
  • Hospital Universitario Donostia
    San Sebastián, Spain
    Recruiting
  • Hospital Universitari i Politecnic La Fe
    Valencia, Spain
    Recruiting
  • National Hospital for Neurology & Neurosurgery
    London, United Kingdom
    Recruiting
  • St. George's University Hospitals NHS Foundation Trust
    London, United Kingdom
    Recruiting
  • Royal Victoria Infirmary
    Newcastle upon Tyne, United Kingdom
    Recruiting
  • Royal Hallamshire Hospital
    Sheffield, United Kingdom
    Recruiting
  • University of California Irvine
    Orange, California, United States
    Active not recruiting
  • Stanford University
    Palo Alto, California, United States
    Active not recruiting
  • University of Colorado
    Denver, Colorado, United States
    Active not recruiting
  • University of Florida
    Gainesville, Florida, United States
    Active not recruiting
  • University of Iowa
    Iowa City, Iowa, United States
    Active not recruiting
  • Kansas University Medical Center
    Kansas City, Kansas, United States
    Active not recruiting
  • Kennedy Krieger Institute
    Baltimore, Maryland, United States
    Active not recruiting
  • University of Massachusetts
    Worcester, Massachusetts, United States
    Active not recruiting
  • University of Rochester Medical Center
    Rochester, New York, United States
    Active not recruiting
  • Duke University
    Durham, North Carolina, United States
    Active not recruiting
  • Ohio State University
    Columbus, Ohio, United States
    Active not recruiting
  • University of Pennsylvania
    Philadelphia, Pennsylvania, United States
    Active not recruiting
  • University of Texas Health Science Center at San Antonio
    San Antonio, Texas, United States
    Active not recruiting
  • Virginia Commonwealth University
    Richmond, Virginia, United States
    Active not recruiting
  • Aarhus University Hospital
    Aarhus, Denmark
    Not yet recruiting
  • Centre de Reference des Maladies Neuromusculaires et de la SLA - AP-HM Hopital de La Timone
    Marseille, France
    Not yet recruiting
  • CHU de Montpellier - Hopital Gui de Chauliac
    Montpellier, France
    Not yet recruiting
  • CHU de Nice - Hopital Pasteur 2 - Centre de reference des Maladies Neuromusculaires
    Nice, France
    Not yet recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

  • BetterLife FSHD: a patient-driven health platform

    This project tries to connect people with FSHD to personalized resources and collect their health experiences so they can be matched to relevant studies and help improve care.

    Recruiting FSHD Society · Randolph, Massachusetts · NCT07409142

  • Apitegromab for FSHD in Adults (Phase 2)

    This study tests whether apitegromab works as a standalone treatment for adults with FSHD.

    Recruiting Phase 2 Scholar Rock, Inc. · Austin, Texas · NCT07435129

  • Assessing respiratory function in FSHD patients using diaphragmatic ultrasound

    This study is testing how well diaphragmatic ultrasound can track changes in breathing function over a year in people with Facioscapulohumeral Muscular Dystrophy (FSHD).

    Recruiting Fondazione Policlinico Universitario Agostino Gemelli IRCCS · Roma · NCT06078852

  • Amino acids plus diet and exercise for people with FSHD

    This trial will test whether taking essential amino acid supplements together with a structured diet and exercise program helps adults with FSHD build muscle, reduce fat, and improve physical performance compared with placebo and matched healthy adults.

    Recruiting University of Pavia · Voghera, Pavia · NCT07543016

  • Wearable monitoring of walking and arm movement in adults with neuromuscular or metabolic movement disorders

    This project uses a wrist/ankle wearable to continuously monitor walking and upper-limb movement in ambulant adults with neuromuscular diseases or obesity to see if digital measures like stride speed track real-life motor function.

    Recruiting Centre Hospitalier Universitaire de Liege · Liège · NCT07136844

  • Umbilical cord lining stem cell treatment for FSHD

    This trial will try two intravenous doses of umbilical cord lining–derived stem cells (ULSC) versus placebo to see if they are safe and help people aged 15+ with genetically confirmed FSHD and moderate disease (Ricci score ≥3).

    Recruiting Phase 1 Restem, LLC. · Palo Alto, California · NCT07086521

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.