Phenotype/Genotype Correlations in Neuromuscular Disorders

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00017745
Recruitment Status : Completed
First Posted : June 11, 2001
Last Update Posted : July 2, 2017
Information provided by:
National Institutes of Health Clinical Center (CC)

Brief Summary:

The Neuromuscular Diseases Section (NDS) is conducting research on certain inherited myopathies and neuropathies, disorders that lead to disability and sometimes death. NDS, along with other groups, has identified some disease-causing genes. The National Institutes of Health Clinical Center proposes new research to identify additional hereditary neuromuscular diseases and conduct genetic studies in order to localize, clone, and characterize the diseases.

An expected 50 patients with known or suspected inherited myopathy or neuropathy and their families will be recruited for this study. If travel to the Clinical Center is impossible, investigators may come to them to do the tests. Ten to twenty cubic centimeters of blood will be drawn for DNA extraction and genotyping. Some abnormal movements of muscle atrophy will be documented by videotaping. If necessary, diagnostic laboratory and radiographic studies will be done to confirm diagnosis. Because the diseases are hereditary, blood may also be drawn from family members. The family will be counseled and the participants invited back annually to investigate the progression of the disease.

Each participant will be evaluated by a history and initial neurological exam. Up to another 20 mL of blood will be drawn for routine blood studies. Other medical care procedures may include a chest x-ray, EKG and echocardiogram, CT (computed tomography) or MRI (magnetic resonance imaging) scan, pulmonary function tests, and physical therapy assessment. Possible research procedures may include MR spectroscopy, nerve conduction study, electromyography, muscle or nerve biopsy, and lumbar puncture.

The researchers have decided not to inform the family if nonpaternity or adoption is discovered by the DNA genotyping. Also, because a carrier of the disease gene may not necessarily develop the disease, family members will not be informed if they are carriers.

Condition or disease
Neuromuscular Disease

Detailed Description:
The goal of this protocol is to identify families with inherited neuromuscular disorders, evaluate disease manifestations to establish an accurate clinical diagnosis by using newest technological advances and investigate the underlying molecular mechanisms. Studies of inherited myopathies in large families with good genealogical records are especially valuable. Patients with diseases of known molecular basis will be genotyped to conduct analysis of phenotype/genotype correlation. Patients with diseases of unknown or incomplete genetic characterization will be studied with a hope of contributing to the identification of specific disease-causing genes and to genetic mechanisms responsible for a specific disorder.

Study Type : Observational
Enrollment : 1000 participants
Official Title: Phenotype/Genotype Correlations in Inherited Myopathies
Study Start Date : June 1, 2001
Study Completion Date : May 10, 2007

Resource links provided by the National Library of Medicine

Information from the National Library of Medicine

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Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Patients of all ages with known or suspected inherited myopathies or neuropathies or neuropathies and their families will be considered as potential candidates for the study.

Pregnant women will be included.

Family members of studied patients who express interest in participating will be also accepted.

Willingness and legal ability to give and sign informed study consent.

Willingness to travel to the Clinical Center for evaluation if necessary.

Willingness to submit tissue for testing this may include muscle, nerve and peripheral blood.


People with no known or suspected inherited myopathies or neuropathies.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00017745

United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Institute of Neurological Disorders and Stroke (NINDS)

Publications: Identifier: NCT00017745     History of Changes
Other Study ID Numbers: 010187
First Posted: June 11, 2001    Key Record Dates
Last Update Posted: July 2, 2017
Last Verified: May 10, 2007

Keywords provided by National Institutes of Health Clinical Center (CC):
Hereditary Myopathies
Intermediate Filaments
Genetic Testing
Inherited Neuromuscular Disorder

Additional relevant MeSH terms:
Neuromuscular Diseases
Nervous System Diseases