Active clinical trials for "Glycogen Storage Disease Type II"

Long-term outcome in late-onset Pompe disease treated beyond 36 months (ATBIG-Pompe-Study), a multicenter, multinational, longitudinal, non-interventional observational study in subjects, at least 8 years old, diagnosed with late-onset Pompe disease retrospectively and prospectively collects data to understand clinical progression in terms of muscle and respiratory function, and clinical symptomology treated with alglucosidase alfa more than 36 months in 100 subjects.

To describe severe late onset patients with pompe disease receiving Myozyme®

The purposes of this study are to identify gene mutations in patients with the muscle diseases phosphofructokinase (PFK) deficiency, acid maltase deficiency (GAA deficiency) and to learn more about how these diseases develop. PFK deficiency is a mild, exercise-related illness. The childhood form of GAA deficiency (Pompe disease) affects the heart and liver and is rapidly fatal. The adult form begins in midlife and involves degeneration of skeletal muscles, leading to weakness and muscle wasting. The following groups of individuals may be eligible for this study: Group A: Patients with PFK deficiency, acid maltase deficiency, and relatives who also are affected. Participants in this group will undergo a brief medical and family history, blood sample collection, and possibly a physical examination, review of medical records, and interview with the patient's physician. Group B: Unaffected family members of patients in group A, including both blood relatives and spouses. People in this group may be asked to provide a history and genetic information. A review of medical records, interview with the individual's physician, and blood sample may also be requested. Group C: Control subjects. This group will provide a small blood sample or buccal mucosal sample (tissue sample collected by brushing the inside of the cheek). The samples will be coded and the investigators will not know the participants' identities. DNA from these samples will be analyzed for frequency of gene mutations. Genetic counseling will be arranged for patients, as appropriate.

This purpose of this study is to determine if tongue strength and tongue ultrasound measurements differentiates patients with untreated late-onset Pompe Disease (LOPD) from patients with acquires/hereditary myopathies or neuropathies. It is hypothesized that abnormalities in tongue function and structure in patients with LOPD may be useful in discriminating this condition from others that have similar presentations.

Given the 100 fold increase of the incidence of Pompe's disease in Western French Guiana, the objective of the present study is to implement systematic screening in newborns in French Guiana in order to start treatment before the muscular and cardiac symptoms appear.

The purpose of this study is to determine eligibility for the future clinical trial of gene therapy in adults with late-onset Pompe disease. This screening protocol will enroll up to 20 adults patients (>=18 yo) with late-onset Pompe disease. Study assessments include review of medical history, vital signs, physical examination, muscle function testing, lung function testing, blood and urine collection, serum pregnancy test and ECG. The study results will be collected to perform descriptive statistical analysis and used to determine eligibility for the proposed clinical trial of gene therapy in the future.

Given the high incidence of Pompe's Disease in French Guiana (100 times higher than in mainland France) the aim is to determine the prevalence of heterozygotes among women having just delivered in French Guiana who accepted that their newborn child enters the depipomp1 study. In these women the specific mutations p.Gly648Ser and p.Arg854X will be sought using PCR in order to calculate the prevalence of these mutations and estimate the risk factors associated with them in order to improve genetic counselling.

This study intends to evaluate dynamic respiratory motor performance as a valuable measure of pulmonary function in adults with late-onset Pompe disease. The investigators will adopt a strategy that includes comprehensive evaluations of respiratory volume, flow, and timing parameters during resting and loaded breathing. These evaluations will then be associated to the standard clinical measure of maximal inspiratory pressure, the static inspiratory muscle function, as well as magnetic resonance imaging of thoracic expansion and diaphragmatic descent at rest and with exertion. Outcomes in participants with late-onset Pompe disease will be contrasted to the function of age- and gender-matched control subjects. This approach will enable the investigators to evaluate the relationship between dynamic diaphragmatic function and respiratory motor function.

To collect uniform and meaningful data on patients with Pompe disease who experience anaphylaxis, severe allergic reactions, and/or signals of severe cutaneous and/or systemic immune complex-mediated reactions following treatment with alglucosidase alfa.

Pompe disease (also known as glycogen storage disease type II) is caused by a deficiency of a critical enzyme in the body called acid alpha-glucosidase (GAA). Normally, GAA is used by the body's cells to break down glycogen (a stored form of sugar) within specialized structures called lysosomes. In patients with Pompe disease, an excessive amount of glycogen accumulates and is stored in various tissues, especially heart and skeletal muscle, which prevents their normal function. The primary objective of this study is to identify potential candidates for future clinical studies in Pompe disease.