Genetic Studies of Lysosomal Storage Disorders
|ClinicalTrials.gov Identifier: NCT00001215|
Recruitment Status : Enrolling by invitation
First Posted : November 4, 1999
Last Update Posted : March 29, 2018
|First Submitted Date||November 3, 1999|
|First Posted Date||November 4, 1999|
|Last Update Posted Date||March 29, 2018|
|Study Start Date||May 16, 1986|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures||Not Provided|
|Original Primary Outcome Measures||Not Provided|
|Change History||Complete list of historical versions of study NCT00001215 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures||Not Provided|
|Original Secondary Outcome Measures||Not Provided|
|Current Other Outcome Measures||Not Provided|
|Original Other Outcome Measures||Not Provided|
|Brief Title||Genetic Studies of Lysosomal Storage Disorders|
|Official Title||Studies of Genetic Heterogeneity in Patients With Lysosomal Storage Disorders|
The purpose of this study is to identify genetic, biochemical, and clinical factors that are associated with disease severity in people with Gaucher disease and other lysosomal storage disorders.
There is a vast spectrum of clinical manifestations in people with Gaucher disease as well as other lysosomal storage disorders. This study will evaluate patients with lysosomal disorders on an outpatient or inpatient basis in order to better characterize the clinical, genetic, and pathophysiological features of these disorders. Participants will be re-evaluated on an annual basis....
There is a vast spectrum of clinical manifestations encountered in individuals with lysosomal storage diseases. Lysosomes are organelles that are involved in the degradation of intracellular proteins, recycled products and organelle in the cell. Lysosomal storage disorders occur when an enzyme necessary for breaking down these molecules is deficient, and, as a result, the substrate accumulates within the lysosomes of cells and may affect different organ systems. This is a longitudinal natural history study of patients with Gaucher disease and other storage disorders. Gaucher disease, the most common lysosomal storage disorder, results from the inherited deficiency of the enzyme glucocerebrosidase, which breaks down the lipid glucocerebroside. The disease is characterized by extremely variable phenotypes, with some patients presenting in childhood with virtually all the complications of Gaucher disease, while others remain asymptomatic into their eighth decade. Often patients with Gaucher disease develop hepatosplenomegaly, anemia, thrombocytopenia and bony problems. Gaucher disease has traditionally been divided into three clinical subtypes, delineated by the absence or presence of neurologic involvement and its progression:
Type 1 -Non-neuronopathic form
Type 2 -Acute neuronopathic form
Type 3 -Chronic neuronopathic form
Some patients, however, defy classification into these three categories, and it may be more
accurate to regard Gaucher disease as a continuum of phenotypes..In addition, patients and
carriers for Gaucher disease are at increased risk for developing Parkinson disease and related disorders.
Our goal in this study is to identify genetic, biochemical, and clinical parameters that are associated with disease severity in individuals with lysosomal storage disorders, identify mild phenotypic manifestations in their relatives, and explore the natural history and extent of associated clinical manifestations. We also want to investigate non-motor manifestations in subjects at higher risk for developing parkinsonism that could contribute to earlier diagnosis. Participants will be evaluated at the NIH to better characterize the clinical, genetic and pathophysiological features of these disorders. In order to better understand the entire effect of the enzyme deficiencies and the function of the specific proteins involved, emphasis will be placed on individuals with atypical presentations. In particular, we will focus on subjects with Gaucher disease and parkinsonism, to better understand the association between the two disorders. Following an initial comprehensive workup, participants will be studied either in the inpatient wards or the outpatient clinic, and will be re-evaluated at periodic intervals longitudinally.
|Study Design||Not Provided|
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Study Groups/Cohorts||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status||Enrolling by invitation|
|Study Completion Date||Not Provided|
|Primary Completion Date||Not Provided|
Participants must be found to have or be a carrier of a documented lysosomal storage disorder or be a family member of a documented proband.
There are no exclusion criteria.
|Ages||up to 99 Years (Child, Adult, Senior)|
|Accepts Healthy Volunteers||No|
|Contacts||Contact information is only displayed when the study is recruiting subjects|
|Listed Location Countries||United States|
|Removed Location Countries|
|Other Study ID Numbers||860096
|Has Data Monitoring Committee||Not Provided|
|U.S. FDA-regulated Product||Not Provided|
|IPD Sharing Statement||Not Provided|
|Responsible Party||National Institutes of Health Clinical Center (CC) ( National Human Genome Research Institute (NHGRI) )|
|Study Sponsor||National Human Genome Research Institute (NHGRI)|
|PRS Account||National Institutes of Health Clinical Center (CC)|
|Verification Date||March 1, 2018|