View clinical trials related to Glycogen Storage Disease Type II.
Filter by:The primary purpose of this study is to: - Document the developmental outcomes of individuals with Pompe disease treated with long-term enzyme-replacement therapy (ERT) through school-age (ages 6-18) using measures of cognitive functioning, academic skills, and speech and language abilities. - Investigate possible cognitive processing speed weaknesses using BrainBaseline neurocognitive assessment software. - Investigate the relationship between behavior and other developmental factors including speech and language ability and cognitive ability. - Explore if the use of selected iPad applications may help strengthen cognitive processing speed in children with Pompe disease
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.
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.
The incidence of type II glycogen-storage disease (Pompe disease) varies depending on ethnicity and geographic region. As of 2010, nine studies have been published documenting the incidence of Pompe disease. It is most common within the African American population, with an incidence of 1 in 14,000. In the U.S. more broadly speaking, the combined incidence of all three variants of the disease is 1 in 40,000. These estimates relied on the frequencies of three mutations in the gene acid alpha-glucosidase (GAA), leading to variants of the disease. Criteria for inclusion in the studies were often non-selective; in many cases, molecular genetic screening was done at birth. With such a high prevalence of Pompe disease reported, it is expected that large university medical centers specializing in neuromuscular diseases would see a higher incidence of Pompe disease among their patients. From a comparable Italian multicenter study, it appears that Pompe disease accounts for 3% of all patients presenting with proximal weakness with or without CK elevation. This study will measure the incidence of Pompe disease based on manifest laboratory abnormality, namely low GAA enzyme activity. Analysis of GAA enzyme activity will be determined through a blood sample of 4 mL. The study seeks to measure the epidemiology of Pompe disease by symptomatically screening all patients who present with symptoms of hitherto undiagnosed proximal weakness with or without elevation of the muscle enzyme, creatinine kinase (CK), or elevation of CK alone, at thirteen academic tertiary neuromuscular practices throughout the United States and Canada. Total recruitment is expected to be ~1,500 participants. It is anticipated that the number of incident Pompe cases in this cohort would be between 3-5%, i.e. 45-75 newly diagnosed cases of Pompe disease.
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.
This study is being done to test the effects of respiratory muscle training (RMT) in patients with late-onset Pompe Disease (LOPD) who have weakness of their breathing muscles. The results of this study will help design future research studies about RMT in LOPD. The goals of this study are to decide if sham-RMT is a useful control condition for RMT and to choose the best ways to measure the health benefits of RMT in LOPD.
Primary Objective: To determine the effect of avalglucosidase alfa treatment on respiratory muscle strength measured by percent (%) predicted forced vital capacity (FVC) in the upright position, as compared to alglucosidase alfa. Secondary Objective: To determine the safety and effect of avalglucosidase alfa treatment on functional endurance (6-minute walk test, inspiratory muscle strength (maximum inspiratory pressure), expiratory muscle strength (maximum expiratory pressure), lower extremity muscle strength (hand-held dynamometry), motor function (Quick Motor Function Test), and health-related quality of life (Short Form-12).
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.
A breach of respiratory function may be one of the elements more or less early or predominant clinical picture of neuromuscular diseases. It is considered that the obstructive syndromes represent 64% and restrictive or mixed syndromes 36% of chronic respiratory insufficiency, approximately 7% due to a neuromuscular disease. The frequency and type of impairment are dependent on the underlying pathology. The neuromuscular restrictive respiratory failure (IRR) remains partially unknown pulmonologists, especially because the signs of muscle weakness are sometimes difficult to detect. However, respiratory diseases are a major concern in neuromuscular diseases because they can have an impact both on sleep (not sleep, ...) on the daily activities (breathlessness on exertion, dyspnea) and thereby alter the quality of life of patients. Moreover, they represent a significant morbidity and mortality factor. Chest tightness may in some cases reveal the disease and thus constitute the chief complaint of a patient with a neuromuscular disease. In late-onset Pompe disease, lung disease is the predominant clinical symptoms in about 30% of patients. An algorithm was developed to guide practitioners and help them in their diagnostic approach to the cause of the IRR (diagnostic algorithm ATS / ERS 2005). However, this algorithm does not allow precise identification of the neuromuscular causes. At the patient level, this can have an impact by extending the time before placing a diagnosis. In Pompe disease, the average time to diagnosis reached 7.9 years. However, there are for this disease a simple and rapid diagnostic test. Therefore, a greater awareness of practitioners with regard to the particular Pompe disease and neuromuscular diseases in general may be beneficial to patients. This study aims to: i) awareness pulmonologists to the possibility of neuromuscular an IRR. ii) characterize the frequency of neuromuscular origin of IRR in a broad population of patients with concomitant signs muscle weakness. iii) reduce the time to diagnosis by directing patients to neuromuscular reference center early.
Study Objectives: 1. Determine the correlation between quantitative muscle ultrasound (QMUS), electrical impedance myography (EIM) and currently accepted measures of physical function. 2. Determine the reliability of EIM measures performed in the home through use of a hand held device. 3. Determine if QMUS and EIM can detect pre-clinical changes in Pompe disease.