Clinical Trial to Evaluate the Efficacy, Safety, and Tolerability of RO7239361 in Ambulatory Boys With Duchenne Muscular Dystrophy

• Diagnosed with DMD by confirmed medical history and genetic testing
• Able to walk without assistance
• Minimum North Star Ambulatory Assessment score of 15 at screening
• Able to walk up 4 stairs in 8 seconds or less
• Weigh at least 15 kg (33 lbs)
• Taking corticosteroids for DMD

• Any behavior or mental issue that will affect the ability to complete the required study procedures
• Previously or currently taking medications like androgens or human growth hormone
• Use of a ventilator during the day
• Unable to have blood samples collected or receive an injection under the skin
• Concomitant or previous participation at any time in a gene therapy study

Other protocol defined Inclusion/Exclusion Criteria could apply.