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Genetic Analysis of the Chiari I Malformation

This study is currently recruiting participants.
Verified September 12, 2017 by National Institutes of Health Clinical Center (CC) ( National Institute of Neurological Disorders and Stroke (NINDS) )
Sponsor:
ClinicalTrials.gov Identifier:
NCT00004738
First Posted: February 28, 2000
Last Update Posted: October 19, 2017
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. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details.
Information provided by (Responsible Party):
National Institutes of Health Clinical Center (CC) ( National Institute of Neurological Disorders and Stroke (NINDS) )
  Purpose

The purpose of this study is to better understand the genetic factors related to the Chiari I malformation. In people with this abnormality, the lower part of the skull is smaller than normal. As a result, the lowest part of the brain, called the cerebellar tonsils, protrudes out of the hole at the bottom of the skull into the spinal canal. This study will try to discover the location of the genes responsible for the malformation.

Candidates for this study are: 1) Patients with Chiari I malformation who also have a family member with the abnormality or a family member with syringomyelia (a cyst in the spinal cord that is often associated with the Chiari I malformation). 2) Family members of patients with the Chiari I malformation.

Participants will have a medical history and physical and neurologic examinations. They will undergo magnetic resonance imaging (MRI) of the brain and cervical (neck) spinal cord to measure the size of the head and determine the presence of the Chiari I malformation and syringomyelia. A small blood sample (about 2 tablespoons) will be drawn for DNA studies relating to the Chiari I malformation.


Condition
Syringomyelia Type I Arnold Chiari Malformation

Study Type: Observational
Official Title: Genetic Analysis of the Chiari I Malformation

Resource links provided by NLM:


Further study details as provided by National Institutes of Health Clinical Center (CC) ( National Institute of Neurological Disorders and Stroke (NINDS) ):

Estimated Enrollment: 200
Study Start Date: February 25, 2000
Detailed Description:

Objectives: The goal of this study is to establish family pedigrees and undertake genetic linkage analysis that will identify gene loci associated with the Chiari I malformation and underdevelopment of the bone forming the posterior cranial fossa.

Study Population: Patients and family members of patients with the Chiari I malformation. Because the research institutions are located in the United States and Russia, subjects will be recruited predominantly from these countries.

Design: Human subjects will undergo 1) neurologic examinations, 2) head and cervical MRI scans to evaluate for the Chiari I malformation, syringomyelia, and maldevelopment of the posterior fossa, and 3) isolation and analysis of genomic DNA from whole blood for linkage analysis.

Outcome Measures: Pedigrees will be established based on the MRI findings. The Chiari I phenotype will be defined as the caudal portion of the cerebellar tonsils lying greater than or equal to 2 mm below the foramen magnum and underdevelopment of the bone of the posterior fossa will be defined as 1) obliteration of the CSF pathways in the inferior portion of the posterior fossa, 2) posterior fossa volume to supratentorial volume ratio of less than or equal to 15%, or 3) abnormal shortening of the bones of the skull base. Genetic analysis of the genomic DNA will be performed with DNA polymorphic markers to identify chromosomal loci linked to the small posterior fossa phenotype. A lod score of 3.0 (equivalent to 1000:1 odds in favor of linkage) will be taken as proof that the Chiari I gene maps to the same genetic region of the human genome as a given DNA marker.

  Eligibility

Information from the National Library of Medicine

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Ages Eligible for Study:   1 Year and older   (Child, Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria
  • INCLUSION CRITERIA:

To be eligible for entry into the study, a candidate must meet the following criteria:

Patient with the Chiari I malformation who has a family member with syringomyelia or Chiari I malformation, or

Family member of a patient with the Chiari I malformation, AND

There are at least two family members diagnosed with Chiari I malformation.

If an adult, able to give informed consent; if a minor, has an adult who is legally responsible for the subject and who is able to give consent.

EXCLUSION CRITERIA:

A candidate will be excluded if he:

Has a contraindication to MRI scanning.

Is unable to comprehend the risks of the testing.

Is less than one year of age.

Cannot undergo MRI scanning without sedation.

  Contacts and Locations
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 ClinicalTrials.gov identifier (NCT number): NCT00004738


Contacts
Contact: Gretchen C Scott, R.N. Not Listed SNBrecruiting@nih.gov

Locations
United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike Recruiting
Bethesda, Maryland, United States, 20892
Contact: For more information at the NIH Clinical Center contact Patient Recruitment and Public Liaison Office (PRPL)    800-411-1222 ext TTY8664111010    prpl@mail.cc.nih.gov   
Russian Federation
Kazan State Medical University Recruiting
Tartar Republic, Russian Federation
Sponsors and Collaborators
National Institute of Neurological Disorders and Stroke (NINDS)
Investigators
Principal Investigator: John D Heiss, M.D. National Institute of Neurological Disorders and Stroke (NINDS)
  More Information

Additional Information:
Publications:
Responsible Party: National Institute of Neurological Disorders and Stroke (NINDS)
ClinicalTrials.gov Identifier: NCT00004738     History of Changes
Other Study ID Numbers: 000089
00-N-0089
First Submitted: February 26, 2000
First Posted: February 28, 2000
Last Update Posted: October 19, 2017
Last Verified: September 12, 2017

Keywords provided by National Institutes of Health Clinical Center (CC) ( National Institute of Neurological Disorders and Stroke (NINDS) ):
Arnold Chiari Malformation
Skeletal Dysplasia
Syringomyelia
Genetics
Chiari I Malformation

Additional relevant MeSH terms:
Congenital Abnormalities
Syringomyelia
Arnold-Chiari Malformation
Spinal Cord Diseases
Central Nervous System Diseases
Nervous System Diseases
Neural Tube Defects
Nervous System Malformations