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The Classification and Cause of Leukodystrophies of Unknown Cause

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ClinicalTrials.gov Identifier: NCT00001671
Recruitment Status : Completed
First Posted : November 4, 1999
Last Update Posted : July 2, 2017
Sponsor:
Information provided by:
National Institutes of Health Clinical Center (CC)

Tracking Information
First Submitted Date November 3, 1999
First Posted Date November 4, 1999
Last Update Posted Date July 2, 2017
Study Start Date September 9, 1997
Primary Completion Date Not Provided
Current Primary Outcome Measures Not Provided
Original Primary Outcome Measures Not Provided
Change History
Current Secondary Outcome Measures Not Provided
Original Secondary Outcome Measures Not Provided
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
 
Descriptive Information
Brief Title The Classification and Cause of Leukodystrophies of Unknown Cause
Official Title The Nosology and Etiology of Leukodystrophies of Unknown Cause
Brief Summary

Leukodystrophy is a disease of the white matter of the brain. White matter is the portion of the brain responsible for conducting electrical impulses from one area of the brain to the other. Insulating cells called myelin cover the brain and nerve cells in the white matter. If myelin becomes damaged electrical information cannot be transferred properly.

Many patients suffering from leukodystrophies do not fit the description of any of the defined types of leukodystrophies and are therefore considered to have a leukodystrophy of unknown cause.

The purpose of this study is to define groups of patients with leukodystrophies and to work toward finding the cause of the disorders. In order to do this, researchers will analyze patients with leukodystrophies of unknown causes. Patients will undergo clinical, neurophysiologic, biochemical, and genetic examinations and tests.

Researchers believe that by studying these patients and their disorders they will be able to better understand the causes of myelin destruction, and eventually lead to effective treatments for these disorders.

Detailed Description Patients with leukodystrophies (LDs) of unknown etiology are a heterogeneous group but constitute the second largest group of genetic white matter diseases. The purpose of this study is to: (a) define novel homogeneous groups of patients with LDs and (b) work toward finding the cause of these disorders. In order to achieve these goals, patients with LDs of unknown cause will be analyzed clinically, neurophysiologically, biochemically and genetically. Patients would have been diagnosed as having no known leukodystrophies at outside centers. At the Clinical Center, such patients will undergo a series of neuropsychological, blood, urine, spinal fluid, radiological, and peripheral tissue pathological tests. Some of these tests will be part of a standard battery while others will be tailored to individual patients. Patients will be followed for 3 years. Patients will be screened for mutations in genes coding for structural myelin proteins. In some patients in whom all tests yielded no information regarding the etiology of their disease, open brain biopsy will be considered. Brain biopsy tissue will be evaluated using a novel combination of approaches including detailed pathological, immunohistochemical, and biochemical analysis of myelin proteins and lipids. Oligodendroglial biology and expression of myelin genes in the brain will also be investigated in situ. It is hoped that the present study will help clarify the nosology of the leukodystrophies and significantly advance our understanding of the pathogenesis of these diseases.
Study Type Observational
Study Design Not Provided
Target Follow-Up Duration Not Provided
Biospecimen Not Provided
Sampling Method Not Provided
Study Population Not Provided
Condition Lysosomal Storage Disease
Intervention Not Provided
Study Groups/Cohorts Not Provided
Publications *

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Recruitment Information
Recruitment Status Completed
Enrollment
 (submitted: June¬†23,¬†2005)
400
Original Enrollment Same as current
Study Completion Date December 15, 2008
Primary Completion Date Not Provided
Eligibility Criteria
  • INCLUSION CRITERIA:

    1. Candidates for participation in the protocol will be patients of all ages with clinical and radiographic signs of leukodystrophy who do not have a specific etiology despite a previous comprehensive workup. The preceding investigation would have excluded the following: adrenoleukodystrophy, adrenomyeloneuropathy, metachromatic leukodystrophy, Krabbe disease, Canavan disease, a well-defined amino acid organic acid disorder, or a systemic mitochondrial cytopathy.
    2. First -degree relatives of patients with leukodystrophies of unknown etiology (father, mother, siblings, or sons and daughters of the patients)

EXCLUSION CRITERIA:

  1. Refusal to sign the protocol consent form.
  2. Candidates who are unable to travel to the National Institutes of Health Clinical Center.
Sex/Gender
Sexes Eligible for Study: All
Ages Child, Adult, Older Adult
Accepts Healthy Volunteers No
Contacts Contact information is only displayed when the study is recruiting subjects
Listed Location Countries France,   Israel,   Netherlands,   United States
Removed Location Countries  
 
Administrative Information
NCT Number NCT00001671
Other Study ID Numbers 970170
97-N-0170
Has Data Monitoring Committee Not Provided
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement Not Provided
Responsible Party Not Provided
Study Sponsor National Institute of Neurological Disorders and Stroke (NINDS)
Collaborators Not Provided
Investigators Not Provided
PRS Account National Institutes of Health Clinical Center (CC)
Verification Date December 15, 2008