Effect of Tysabri in Patients With Relapsing-Remitting Multiple Sclerosis: A Follow-up Magnetization Transfer Imaging (MTI) Study
The primary objective of this study is to define the effect of Tysabri in patients with relapsing-remitting (RR) multiple sclerosis (MS) over 2 years. The investigators will also explore the extent of remyelination in MS patients treated with Tysabri over 2 years.
A secondary objective of this study is to investigate differences in the capacity for remyelination between patients who do or do not respond to Tysabri monotherapy during the same 24 months.
A tertiary objective of this study is to monitor Tysabri effect in MS antiphospholipid antibodies positive and MS antiphospholipid antibodies negative patients and to determine perfusion differences according to the antiphospholipid antibodies positivity status.
|Study Design:||Observational Model: Case Control
Time Perspective: Prospective
|Official Title:||Effect of Natalizumab (Tysabri®) on Remyelination in Patients With Relapsing-remitting Multiple Sclerosis. A Follow-up Voxel-wise Magnetization Transfer Imaging Study.|
- To define the effect of Tysabri monotherapy on a voxel-wise basis using magnetization transfer ratio dynamic mapping of the lesions and normal appearing brain tissue in patients with relapsing-remitting multiple sclerosis. [ Time Frame: 2 years ] [ Designated as safety issue: No ]
- To investigate differences in the capacity for remyelination measured by MTR between patients who do or do not respond to Tysabri monotherapy. [ Time Frame: 2 years ] [ Designated as safety issue: No ]
|Study Start Date:||November 2007|
|Study Completion Date:||November 2010|
|Primary Completion Date:||December 2009 (Final data collection date for primary outcome measure)|
63 patients with relapsing-remitting Multiple Sclerosis who are enrolled in the TOUCH program and have been taking Tysabri monotherapy for 2 years.
Infusion of TYSABRI® 300 mg in 100 mL 0.9% Sodium Chloride Injection, USP over approximately one hour at month 0 and 12 and 24 months. After the infusion is complete, flush with 0.9% Sodium Chloride Injection, USP.
Use of filtration devices during administration has not been evaluated. Other medications should not be injected into infusion set side ports or mixed with TYSABRI®.
TYSABRI® concentrate is supplied as 300 mg natalizumab in a sterile, single-use vial free of preservatives. Each package contains a single-use vial.
Other Name: Natalizumab
22 age- and sex-matched normal controls who completed 1 year follow-up.
Magnetization transfer imaging (MTI) is a widely used tool for characterizing the evolution of multiple sclerosis (MS) lesions and normal appearing brain tissue (NABT). As remyelination and demyelination are heterogeneous in each lesion and NABT, techniques such as voxel-wise based MTR dynamic mapping may help predict an individual's clinical course, as well as the effect of treatment, by revealing evidence of myelin repair and neuroprotection.
Natalizumab (Tysabri) showed a robust effect on the decrease of inflammation in phase II and III clinical trials, as evidenced by the decrease in Gd enhancing and T2 lesions and on the decrease of clinical activity as measured by reduction of clinical relapses and progression of disability. The effect of Tysabri on non-conventional measures is only partially known.
|United States, New York|
|Jacobs Neurological Institute|
|Buffalo, New York, United States, 14203|
|Principal Investigator:||Robert Zivadinov, MD, PHd||University at Buffalo|