A Study of the Safety and Effectiveness of Experimental Medicine Vamorolone in Boys With Duchenne Muscular Dystrophy (DMD)

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Age: 4 to 7 years old
Healthy Volunteers: No
Keywords: Duchenne Muscular Dystrophy, DMD
Type: Drug study, Phase 2
10 Participants
The purpose of this research is to see if an experimental drug called vamorolone is effective and has fewer side effects than steroids. It will be studied in children with Duchenne muscular dystrophy (DMD).

Boys with DMD experience progressive muscle weakness as they grow up. Steroids such as prednisone (or prednisolone) and deflazacort, are currently the only class of medication available to all boys with DMD. These medicines have been shown to prolong walking ability.

Steroids have several side effects. Side effects include weight gain, behavioral problems, growth restriction, increased risk of bone fractures. We are doing this research study to see if vamorolone works in DMD and if it has fewer of these side effects.
This study requires

The study team will make sure you qualify to take part in the study. Qualified participants will receive detailed information about the study. This may include a list of study-related tests and procedures.

Who can participate

Inclusion criteria:

  1. Subject's parent(s) or legal guardian(s) has (have) provided written informed consent and Health Insurance Portability and Accountability Act (HIPAA) authorization, where applicable, prior to any study-related procedures; participants will be asked to give written or verbal assent according to local requirements
  2. Subject has a centrally confirmed (by TRiNDS central genetic counselor[s]) diagnosis of DMD as defined as:
  3. Dystrophin immunofluorescence and/or immunoblot showing complete dystrophin deficiency, and clinical picture consistent with typical DMD, OR
  4. Identifiable mutation within the DMD gene (deletion/duplication of one or more exons), where reading frame can be predicted as 'out-of-frame,' and clinical picture consistent with typical DMD, OR
  5. Complete dystrophin gene sequencing showing an alteration (point mutation, duplication, other) that is expected to preclude production of the dystrophin protein (i.e., nonsense mutation, deletion/duplication leading to a downstream stop codon), with a clinical picture consistent with typical DMD;
  6. Subject is ≥ 4 years and <7 years of age at time of enrollment in the study;
  7. Subject weighs >13.0 kg and ≤ 39.9 kg at the Screening Visit;
  8. Subject is able to walk independently without assistive devices;
  9. Subject is able to complete the Time to Stand Test (TTSTAND) without assistance in <10 seconds, as assessed at the Screening Visit;
  10. Clinical laboratory test results are within the normal range at the Screening Visit, or if abnormal, are not clinically significant, in the opinion of the Investigator. [Note: Serum gamma glutamyl transferase (GGT), creatinine, and total bilirubin all must be ≤ upper limit of the normal range at the Screening Visit];
  11. Subject has evidence of chicken pox immunity as determined by presence of IgG antibodies to varicella, as documented by a positive test result from the local laboratory at the Screening Visit;
  12. Subject is able to swallow tablets, as confirmed by successful test swallowing of placebo tablets during the Screening Period; and
  13. Subject and parent(s)/guardian(s) are willing and able to comply with scheduled visits, study drug administration plan, and study procedures.

Exclusion criteria:

  1. Subject has current or history of major renal or hepatic impairment, diabetes mellitus or immunosuppression;
  2. Subject has current or history of chronic systemic fungal or viral infections;
  3. Subject has had an acute illness within 4 weeks prior to the first dose of study medication;
  4. Subject has used mineralocorticoid receptor agents, such as spironolactone, eplerenone, canrenone (canrenoate potassium), prorenone (prorenoate potassium), mexrenone (mexrenoate potassium) within 4 weeks prior to the first dose of study medication;
  5. Subject has a history of primary hyperaldosteronism;
  6. Subject has evidence of symptomatic cardiomyopathy [Note: Asymptomatic cardiac abnormality on investigation would not be exclusionary];
  7. Subject is currently being treated or has received previous treatment with oral glucocorticoids or other immunosuppressive agents [Notes: Past transient use of oral or inhaled glucocorticoids or other oral immunosuppressive agents for indication other than DMD for no longer than 3 months cumulative, with last use at least 3 months (or last use at least one month prior for inhaled glucocorticoids) prior to first dose of study medication, will be considered for eligibility on a case-by-case basis. Inhaled and/or topical glucocorticoids prescribed for an indication other than DMD are permitted if last use is at least 4 weeks prior to first dose of study medication or are administered at stable dose beginning at least 4 weeks prior to first dose of study medication, and are anticipated to be used at the stable dose regimen for the duration of the study];
  8. Subject has an allergy or hypersensitivity to the study medication or to any of its constituents;
  9. Subject has used idebenone within 4 weeks prior to the first dose of study medication;
  10. Subject has severe behavioral or cognitive problems that preclude participation in the study, in the opinion of the Investigator;
  11. Subject has previous or ongoing medical condition, medical history, physical findings or laboratory abnormalities that could affect safety, make it unlikely that treatment and follow-up will be correctly completed or impair the assessment of study results, in the opinion of the Investigator;
  12. Subject is taking (or has taken within 4 weeks prior to the first dose of study medication) herbal remedies and supplements which can impact muscle strength and function (e.g., Co-enzyme Q10, creatine, proglandine, etc);
  13. Subject is taking (or has taken within 3 months prior to the first dose of study medication) any medication indicated for DMD, including Exondys51 and Translarna;
  14. Subject is currently taking any other investigational drug or has taken any other investigational drug within 3 months prior to the first dose of study medication; or
  15. Subject has previously been enrolled in the study. Note: Any parameter/test may be repeated at the Investigator's discretion during Screening to determine reproducibility. In addition, subjects may be rescreened if ineligible due to a transient condition which would prevent the subject from participating, such as an upper respiratory tract infection or injury, or if ineligible due to negative anti-varicella IgG antibody test result.
Benefits and risks of participating

We cannot promise any benefits to you as a result of taking part in this research study.


The study doctor will discuss the risks associated with taking part in this research study.
You will not be paid to take part in this research study.
Study duration and period
You will be in the study for approximately 1 year.
Recruitment period
From Sept. 4, 2018
UC Davis Medical Center
2315 Stockton Boulevard
Sacramento, CA 95817
Research Topic
  • Duchenne Muscular Dystrophy

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