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A phase 2, randomized, double-blind study of S-606001 as an add-on to enzyme replacement therapy (E

Genetics, Neurology
Tahseen Mozaffar
A phase 2, multicenter, randomized, placebo-controlled, double-blind study to investigate the safety, pharmacodynamics, and preliminary efficacy of S-606001 as an add-on to enzyme replacement therapy in patients with late-onset Pompe disease
Brain - Neurologic/ Psychologic
Neuromuscular Diseases
Pompe Disease

Study Description

Eligibility

  1. Participant must be greater than or equal to 18 years of age and greater than or equal to 40 kilograms (kg) of body weight at the time of signing the informed consent.
  2. Participant must have a diagnosis of LOPD based on documentation of 1 of the following:

a. Deficiency of acid alpha-glucosidase (GAA) enzyme

b. GAA genotype

  1. Participant has a %FVC greater than or equal to 30% and less than or equal to 80% in an upright position without mechanical ventilation at screening; or Participant has greater than or equal to 10% %FVC drop from upright position to supine position and %FVC greater than or equal to 20% in a supine position.
  2. Participant performs the 6MWT at screening, as determined by the clinical evaluator, and meets all of the following criteria:

a. Screening values of 6-minute walk distance (6MWD) are &greater than or equal to 75 meters

b. Screening values of 6MWD are less than or equal to 90% of the predicted value for healthy adults

  1. Participants must be ERT-experienced, defined as currently receiving ERT and having been receiving ERT for greater than or equal to 24 months, with no regimen change in the last 6 months.

Key

  1. Has a medical condition or any other extenuating circumstance that may pose an undue safety risk to the participant or may compromise his/her ability to comply with or adversely impact protocol requirements.
  2. Has active infections at screening.
  3. Malignancy within the past 5 years except for basal cell or squamous epithelial carcinomas of the skin that have been resected with no evidence of metastatic disease for 3 years.
  4. Current or chronic history of liver disease.
  5. Known biallelic loss of function mutations whether in glycogenin gene (GYG) or in glycogen phosphorylase muscle associated gene(PYGM) .
  6. Has received any investigational therapy or pharmacological treatment for Pompe disease, within 30 days or 5 half-lives of the therapy or treatment, whichever is longer, before day 1 or is anticipated to do so during the study.
  7. Has received gene therapy or small interfering ribonucleic acid (RNA) therapy for Pompe disease.
  8. Participant, if female, is pregnant or breastfeeding at screening.
  9. Participant, whether male or female, is planning to conceive a child during the study.

Note: Other protocol-specified inclusion and exclusion criteria may apply.

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