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MRI Brain Studies in Patients With HTLV-1 Associated Myelopathy/Tropical Spastic Paraparesis

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: NCT00034723
Recruitment Status : Completed
First Posted : May 2, 2002
Last Update Posted : March 4, 2008
Information provided by:
National Institutes of Health Clinical Center (CC)

Brief Summary:

This study will use three different magnetic resonance imaging (MRI) techniques to study HTLV-1 associated myelopathy/tropical spastic paraparesis (HAM/STP)-a disease of slowly progressive weakness in the legs. It is not known how the HTLV-1 virus causes this disease, but it is thought that as the body's immune system tries to destroy the virus, parts of the nervous system-primarily the spinal cord-are damaged.

Patients 18 years of age and older with HAM/TSP and healthy normal volunteers may be eligible for this study.

Participants will undergo diffusion tensor MRI, MR-spectroscopy, and magnetization transfer imaging to look at different compositional, architectural, and microscopic properties of the brain. All of these techniques are similar to conventional MRI, and like the conventional method they use a strong magnetic field and radio waves to measure structural and chemical changes in brain tissue. Each of the three scans will be done on separate days, each lasting about 1 hour. For the procedures, the patient or volunteer lies on a stretcher in a narrow metal cylinder (the scanner) and is asked to remain still for 15 to 30 minutes at a time. A special lightweight coil may be placed on the head to enhance the brain images. The subject can communicate with the person doing the scan at all times.

Condition or disease
Tropical Spastic Paraparesis

Detailed Description:
Magnetic Resonance Imaging (MRI) has become an important tool in the diagnosis of inflammatory CNS diseases such as Multiple Sclerosis (MS) and HTLV-1 Associated Myelopathy/Tropical Spastic Paraparesis (HAM-TSP). It is widely used as a marker for disease activity and progression. However, conventional MRI methods are only suitable to study gross anatomical features, such as size and shape of a particular area of the brain; questions regarding intrinsic microstructure and morphologic specificity cannot be addressed. But axonal damage or structural abnormalities even in normal appearing brain tissue may play an important role in the development of irreversible disability. Magnetization Transfer Imaging, Magnetic Resonance Spectroscopy and Diffusion Tensor MRI are imaging techniques described to be capable of the detection of such changes. Spectroscopy can detect molecular components in tissue, whereas the Magnetization Transfer Ratio (MTR) allows the measurement of water-macromolecule interactions. Diffusion Tensor MRI (DT-MRI) is an imaging modality that combines features of in vivo anatomical MRI and histopathology: it is an in vivo MRI method that provides information about tissue composition, microstructure, organization and architecture. This is possible because water diffusion properties in tissues, as measured by DT-MRI, are affected by tissue constituents, such as macromolecules, membranes, organelles, as well as by tissue microstructure, architecture and organization. A study comprising Magnetization Transfer-, Spectroscopy- and DT-MRI furnishes important information that cannot be obtained using conventional MRI methods.

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Study Type : Observational
Enrollment : 40 participants
Official Title: MRI Investigation Of The CNS In HTLV-1 Associated Myelopathy/Tropical Spastic Paraparesis (HAM/TSP)
Study Start Date : April 2002
Study Completion Date : March 2004

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes



A. Established Diagnosis of HAM/TSP as defined by Osame, Igata, and Matsumoto and subsequently confirmed by Gessain and Gout and the WHO.

B. Age 18 or older

C. An initial cohort of 5 HAM/TSP patients with established disease with EDSS levels of 6.0 or greater and duration of disease of 2 years or more will be investigated. If MRI abnormalities can be demonstrated, the group will be expanded to 20. Of this 20, at least 5 patients have been identified that will be HLA A201.

Healthy Controls:

A. No history of disease of the nervous system or autoimmune disease

B. Age 18 or older

C. Subjects shall be sex- and age-matched to our patients


A subject will be excluded if he/she has a contraindication to MRI scanning such as the following: Aneurysm clip; Implanted neural stimulator; Implanted cardiac pacemaker or autodefibrillator; Cochlear implant; Ocular foreign body or implant (e.g. metal savings, retinal clips); breast implants; or Insulin pumps. Subjects will be excluded if they have claustrophobia. A pregnancy test will be administered to women of childbearing age. Pregnant women will be excluded from the studies.

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): NCT00034723

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United States, Maryland
National Institute of Neurological Disorders and Stroke (NINDS)
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Institute of Neurological Disorders and Stroke (NINDS)

Layout table for additonal information Identifier: NCT00034723     History of Changes
Other Study ID Numbers: 020180
First Posted: May 2, 2002    Key Record Dates
Last Update Posted: March 4, 2008
Last Verified: March 2004

Keywords provided by National Institutes of Health Clinical Center (CC):
Normal Control
Healthy Volunteer
HTLV-1 Associated Myelopathy
Tropical Spastic Paraparesis

Additional relevant MeSH terms:
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Paraparesis, Tropical Spastic
Muscle Spasticity
Spinal Cord Diseases
Paraparesis, Spastic
Bone Marrow Diseases
Muscular Diseases
Musculoskeletal Diseases
Muscle Hypertonia
Neuromuscular Manifestations
Neurologic Manifestations
Nervous System Diseases
Signs and Symptoms
Central Nervous System Diseases
Hematologic Diseases
HTLV-I Infections
Deltaretrovirus Infections
Retroviridae Infections
RNA Virus Infections
Virus Diseases
Central Nervous System Infections