for males ages 2-7 (full criteria)
at Sacramento, California and other locations
study started
estimated completion



This study is designed to evaluate the ability of ataluren to increase dystrophin protein levels in muscle cells of participants with nmDMD. The study will evaluate the levels of dystrophin before and after 40 weeks of ataluren therapy using muscle biopsies and two validated assay methods, electrochemiluminescence (ECL) and immunohistochemistry.

Official Title

Phase 2 Clinical Pharmacology Study to Assess Dystrophin Levels in Subjects With nmDMD Before and After Treatment With Ataluren


Duchenne Muscular Dystrophy Muscular Dystrophies Muscular Dystrophy, Duchenne Ataluren


You can join if…

Open to males ages 2-7

  • Evidence of signed and dated informed consent/assent document(s) indicating that the participant (and/or his parent/legal guardian) has been informed of all pertinent aspects of the trial.
  • Phenotypic evidence of duchenne muscular dystrophy (DMD) based on the onset of characteristic clinical symptoms or signs (for example, proximal muscle weakness, waddling gait, and Gowers' maneuver) and an elevated serum creatine kinase (CK). Medical documentation of phenotypic evidence of DMD needs to be provided upon request by the Sponsor's medical monitor.
  • Documentation of the presence of a nonsense point mutation in the dystrophin gene as determined by gene sequencing. Review and approval of documentation by sponsor or designee is required prior to enrollment.
  • Willing to undergo muscle biopsy.

You CAN'T join if...

  • Ongoing intravenous (IV) aminoglycoside or IV vancomycin therapy.
  • Known contra-indication to muscle biopsy (such as bleeding or clotting disorders).
  • Prior or ongoing therapy with ataluren.
  • Known hypersensitivity to any of the ingredients or excipients of the study drug (for example, refined polydextrose, polyethylene glycol 3350, poloxamer 407, mannitol 25C, crospovidone XL10, hydroxyethyl cellulose, colloidal silica, magnesium stearate).
  • Exposure to another investigational drug within 2 months prior to start of study treatment, or ongoing participation in any interventional clinical trial.
  • Requirement for daytime ventilator assistance or any use of invasive mechanical ventilation via tracheostomy. Evening non-invasive mechanical ventilation such as use of bilevel positive airway pressure (Bi-PAP) therapy is allowed.
  • Elevated serum creatinine or cystatin C levels at screening.
  • Prior or ongoing medical condition (for example, concomitant illness, psychiatric condition, behavioral disorder), medical history, physical findings or laboratory abnormality that, in the investigator's opinion, could adversely affect the safety of the participant, makes it unlikely that the course of treatment or follow-up would be completed, or could impair the assessment of study results.


  • University of California (UC) Davis Medical Center
    Sacramento California 95817 United States
  • University of California, Los Angeles (UCLA)
    Los Angeles California 90025 United States


accepting new patients
Start Date
Completion Date
PTC Therapeutics
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Phase 2
Study Type
Last Updated