• J Neuroimaging · Sep 2016

    Brain Volume Loss during the First Year of Interferon-Beta Treatment: Baseline Inflammation and Tissue-Specific Volume Dynamics.

    • Angela Vidal-Jordana, Jaume Sastre-Garriga, Francisco Pérez-Miralles, Deborah Pareto, Jordi Rio, Cristina Auger, Mar Tintoré, Alex Rovira, and Xavier Montalban.
    • Department of Neurology-Neuroimmunology and Multiple Sclerosis Centre of Catalonia (Cemcat), Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain.
    • J Neuroimaging. 2016 Sep 1; 26 (5): 532-8.

    ObjectiveA pseudoatrophy effect, mostly affecting white matter, can be observed in patients with multiple sclerosis (MS) early on natalizumab therapy. We aimed to investigate whether a similar pattern could be found after interferon-beta treatment onset.MethodsFrom a prospective, ongoing cohort, 123 patients treated with interferon-beta were included. A brain MRI was performed at baseline (3 months prior) and 12 months after therapy onset in all patients. SPM8 software was used for volumetric analysis. Brain parenchymal, gray and white matter volumes at baseline and follow-up were obtained, allowing calculation of percentage of volume changes (BVc, GMVc, and WMVc, respectively). Descriptive statistics and linear regression models were performed.ResultsEighty-four patients were analyzed (39 patients were excluded mostly due to incomplete MRI protocol or segmentation errors); baseline mean age was 33.6 years (SD 8.7), median disease duration was 2.8 years (.3-14), and median EDSS was 1.5 (0-6). Forty-nine patients (58.3%) had baseline gadolinium-enhancing (Gd+) lesions with a median number of 1 (0-18). The regression analysis (adjusted by the number of Gd+ at follow-up MRI, age, disease duration, and baseline EDSS) showed that a higher baseline number of Gd+ lesions was predictive of larger decreases in BVc and WMVc (P = .013 and P = .003, respectively) but not GMVc (P = .777).ConclusionConcurrent inflammation has an impact on brain volume measurements (especially white matter) during the first year of interferon-beta therapy, and should be taken into account when interpreting early brain volume changes on therapy.Copyright © 2016 by the American Society of Neuroimaging.

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