Pompe Disease
Conditions
Keywords
frequency,, MARTINIQUE, observational study, myalgia, reference center for rare diseases
Brief summary
Pompe's disease is a lysosomal storage disease of autosomal recessive genetic transmission due to a deficiency in acid alpha glucosidase. This enzyme deficiency leads to glycogen overload in all cells but with a more marked expression in muscle cells. There is a great variability in the clinical manifestations and in the age of onset of symptoms depending on whether the enzyme deficiency is partial or total. The prevalence is estimated at 1 in 40,000. There is a specific treatment based on enzyme replacement therapy
Detailed description
Patients include: clinical examination, enzyme activity assay, muscle testing, cardiological and respiratory workup. Lowered enzyme activity suggests a pathogenic genetic variant to be identified. The secondary objective is to propose genetic counselling and a family investigation in order to identify relatives who are also affected.
Interventions
None listed
Sponsors
Study design
Eligibility
Inclusion criteria
* • both sexes * with permanent myalgia, spontaneous or on effort, * with or without muscle deficit, * with or without HyperCkemia * without known etiologies * Age from 6 to 80 years * consulting for the first time or followed at CERCA * giving their free and informed consent to participate after information on the research * Affiliated to the social security system
Exclusion criteria
* Person placed under guardianship and/or curatorship * Myalgias related to a known etiology
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Primary outcome measure | The recruitment will take place in our specialized center for the management and follow-up of patients with neuromuscular pathology. A total of 100 patients are likely to be included in the study during the years 2020-2022 | To estimate the frequency of Pompe's disease in men and women with permanent, spontaneous or exertional myalgia consulting for the first time or followed in our center. This criterion will be evaluated by biochemical and genetic analyses. Improvement of diagnostic deficiency and genetic counseling is envisaged. A discussion could be opened for these patients regarding the application of enzyme replacement therapy. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Cardiological check-up | 2 years | \- ECG : QRS Complex and short PR space (milliseconde) |
| Muscle testing | 2 years | \- Muscle Testing using Medical Research Counsil scale (MRC scale, total score ranging from 0 to 5) |
| Respiratory check-up | 2 years | \- Chest radiography (non mesurable) |
| Genetic counselling activity | 2 years | \- Genetic counseling appointment (non mesurable) |
Other
| Measure | Time frame | Description |
|---|---|---|
| Cardiological check-up | 2 years | echocardiogram (FEVG, measurement of cardiac walls in mm) |
| Genetic counselling activity | 2 years | \- Biological sampling of relatives (non mesurable) |
| Respiratory check-up | 2 years | \- Blood gas : Pa O2 (mmHg) Pa CO2 (mmHg), pH |
Countries
Martinique