A Clinical Assessment Study in X-Linked Myotubular Myopathy (XLMTM) Subjects


This is a pre-Phase 1 prospective, non interventional clinical assessment study to evaluate XLMTM subjects aged 3 years and younger. Many of these clinically relevant measures have not yet been routinely assessed in this population and may provide important insight on the natural history of XLMTM and for future evaluation of potential therapies.

Full Title of Study: “INCEPTUS: A Prospective, Non-Interventional Clinical Assessment Study in X Linked Myotubular Myopathy (XLMTM) Subjects Aged 3 Years and Younger”

Study Type

  • Study Type: Observational
  • Study Design
    • Time Perspective: Prospective
  • Study Primary Completion Date: September 2019

Clinical Trial Outcome Measures

Primary Measures

  • Characterize the disease course and natural history of XLMTM using respiratory assessment of strength as measured by PImax
    • Time Frame: 3 months to 2 years
  • Characterize the disease course and natural history of XLMTM using neuromuscular assessments, as measured by CHOP INTEND/MFM-20
    • Time Frame: 3 months to 2 years

Secondary Measures

  • Characterize quality of life as measured by PedsQL
    • Time Frame: 3 months to 2 years

Participating in This Clinical Trial

Inclusion Criteria

  • Subject has a diagnosis of XLMTM resulting from a confirmed mutation in the MTM1 gene – Subject is male – Subject is aged less than 4 years – Subject requires some mechanical ventilatory support (eg, ranging from 24 hours per day full time mechanical ventilation, to noninvasive support such as continuous positive airway pressure [CPAP] or bilevel positive airway pressure [BiPAP] during sleeping hours) – Access to subject's medical records – Signed informed consent by the parent(s) or legally authorized representative(s) (LAR) (when applicable) – Subject and parent(s) or LAR are willing and able to comply with study visits and study procedures Exclusion Criteria:

  • Subject is participating in an interventional study designed to treat XLMTM – Subject born <35 weeks gestation who is still not to term as per corrected age – Subject has a clinically important condition, or life-threatening disease other than XLMTM, in the opinion of the investigator – Subject has received pyridostigmine or any medication to treat XLMTM within 30 days of enrollment

Gender Eligibility: Male

Minimum Age: N/A

Maximum Age: 3 Years

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • Audentes Therapeutics
  • Provider of Information About this Clinical Study
    • Sponsor
  • Overall Official(s)
    • Salvador Rico, MD, PhD, Study Director, Audentes Therapeutics

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