Multiple Sclerosis
Conditions
Brief summary
Primary Aims: To determine how effective long term Natalizumab (NTZ) therapy is in slowing the progression of whole brain atrophy. Whole brain atrophy rates will be measured through magnetic resonance imaging (MRI) scans and compared between patients with Multiple Sclerosis (MS) who have been using NTZ for at least 2 years versus age and gender-matched healthy controls. The primary outcome will be whole brain atrophy rate measured as the percent change in brain volume (PBVC) over a two-year period. Primary hypothesis: The investigators hypothesize that long term (\>2 years) NTZ therapy will slow the rate of whole brain atrophy in patients with Multiple Sclerosis (MS) (as measured by percent change in brain volume), reaching a whole brain atrophy rate similar to that of non-MS controls (a true disease activity free state).
Interventions
None listed
Sponsors
Study design
Eligibility
Inclusion criteria
* 18-55 inclusive years of age at the time of informed consent * Diagnosis of relapsing multiple sclerosis as defined by the 2010 revised McDonald criteria * Currently taking Tysabri
Exclusion criteria
* Systemic steroid users * comorbidities that could confound MRI outcomes
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Change in Brain Atrophy Rate | Baseline, Year 1, and Year 2 |
Secondary
| Measure | Time frame |
|---|---|
| Change in Mean Cortical Thickness | Baseline, Year 1, and Year 2 |
| Change in Neocortical Gray Matter Volume | Baseline, Year 1, and Year 2 |
| Change in Subcortical Gray Matter Volume | Baseline, Year 1, and Year 2 |
Other
| Measure | Time frame |
|---|---|
| Change in Patient-reported Quality of Life | Baseline, Year 1, and Year 2 |
Countries
United States