A Study to Check Liver Health in Boys With XLMTM, a Serious Genetic Muscle Condition
Recruiting
Observational Study
X-Linked Myotubular Myopathy
No Placebo Group
Every participant receives an active treatment — no one gets a placebo.
No Study Drug
Researchers observe your health over time — no experimental treatment is given.
Ready to participate?
Review the details below, then apply to join this clinical trial.
At a Glance
Age
Up to 17
Sex
Male
Study type
Observational
Participants needed
50 (estimated)
Sponsor
Astellas Gene Therapies · Industry
Who this trial is looking for
This trial is looking for boys under 18 who have been diagnosed with XLMTM. Participants will have their liver health checked regularly for about a year to understand liver problems better.
Are You a Good Fit for This Trial?
You may be able to join if
I have been diagnosed with XLMTM.
I have a genetic test confirming a mutation in the MTM1 gene.
I need some mechanical ventilatory support.
I or my parent/carer is willing to follow the study schedule.
You may not be able to join if
I am currently enrolled in a study that treats XLMTM.
Summarized in plain language from this trial's official eligibility criteria.
The full criteria are further down this page — only the research team can
confirm whether you qualify.
Think this trial could be right for you?
Answer a few quick questions to see if you may meet the eligibility requirements.
XLMTM (X-linked myotubular myopathy) is a serious genetic muscle condition. It is caused by changes in the MTM1 gene which stops or slows down normal muscle development, causing severe muscle weakness. There is currently no cure for XLMTM. Ongoing care is needed to manage symptoms and prevent further medical problems from this condition.
Recent research shows that individuals with XLMTM often hav…
XLMTM (X-linked myotubular myopathy) is a serious genetic muscle condition. It is caused by changes in the MTM1 gene which stops or slows down normal muscle development, causing severe muscle weakness. There is currently no cure for XLMTM. Ongoing care is needed to manage symptoms and prevent further medical problems from this condition.
Recent research shows that individuals with XLMTM often have reduced bile flow which can affect liver and gallbladder health. Bile is a liquid made in the liver that helps digest fat. Ongoing liver health checks may help with the routine care of people with XLMTM.
There is a need to understand liver problems that develop in individuals with XLMTM over time. The main aim of the study is to learn how many boys with XLMTM have new cases of liver problems during the study.
This study is about collecting information only. This is known as an observational study. The individual's doctor decides on treatment, not the study sponsor (Astellas).
In this study, boys under 18 diagnosed with XLMTM will be followed for about 1 year. The health of their liver and gallbladder will be checked about every 6 weeks. This can be done at home, if preferred. A scan called a Fibroscan (also known as transient elastography) will check for signs of scarring in the liver (fibrosis) and the build-up of lipids. It is suggested that each boy will have a Fibroscan when they start the study and another scan when they complete the study.
This study will help understand liver, gallbladder, and bile duct issues in individuals with XLMTM over time. The goal is to improve their care and provide information to use in future clinical studies.
Trial Locations
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Eligibility Criteria
Inclusion Criteria:
* Participant has a diagnosis of XLMTM resulting from a genetically confirmed mutation in the MTM1 gene based on genetic test reports.
* Participant requires some mechanical ventilatory support (e.g., ranging from 24 hours per day full-time mechanical ventilation, to non-invasiv…
Inclusion Criteria:
* Participant has a diagnosis of XLMTM resulting from a genetically confirmed mutation in the MTM1 gene based on genetic test reports.
* Participant requires some mechanical ventilatory support (e.g., ranging from 24 hours per day full-time mechanical ventilation, to non-invasive support such as continuous positive airway pressure (CPAP) or bilevel positive airway pressure (BiPAP) during sleeping hours)
* Participant (as applicable) and/or parent(s)/carer is willing to comply with the recommended schedule of assessments.
Exclusion Criteria:
* Participant is currently enrolled in an interventional study designed to treat XLMTM.
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