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Published in: BMC Medical Imaging 1/2016

Open Access 01-12-2016 | Research article

The effect of intramuscular interferon beta-1a on spinal cord volume in relapsing-remitting multiple sclerosis

Authors: Sheena L. Dupuy, Fariha Khalid, Brian C. Healy, Sonya Bakshi, Mohit Neema, Shahamat Tauhid, Rohit Bakshi

Published in: BMC Medical Imaging | Issue 1/2016

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Abstract

Background

Spinal cord atrophy occurs early in multiple sclerosis (MS) and impacts disability. The therapeutic effect of interferon beta-1a (IFNβ-1a) on spinal cord atrophy in patients with relapsing-remitting (RR) MS has not been explored.

Methods

We retrospectively identified 16 consecutive patients receiving weekly intramuscular IFNβ-1a for 2 years [baseline age (mean ± SD) 47.7 ± 7.5 years, Expanded Disability Status Scale score median (range) 1.5 (0–2.5), timed 25-foot walk 4.6 ± 0.7 seconds; time on treatment 68.3 ± 59.9 months] and 11 sex- and age-matched normal controls (NC). The spinal cord was imaged at baseline, 1 and 2 years later with 3T MRI. C1-C5 spinal cord volume was measured by an active surface method, from which normalized spinal cord area (SCA) was calculated.

Results

SCA showed no change in the MS or NC group over 2 years [mean annualized difference (95 % CI) MS: −0.604 mm2 (−1.352, 0.144), p = 0.106; NC: −0.360 mm2 (−1.576, 0.855), p = 0.524]. Between group analysis indicated no differences in on-study SCA change [MS vs. NC; year 1 vs. baseline, mean annualized difference (95 % CI) 0.400 mm2 (−3.350, 2.549), p = 0.780; year 2 vs. year 1: −1.196 mm2 (−0.875, 3.266), p = 0.245; year 2 vs. baseline −0.243 mm2 (−1.120, 1.607), p = 0.712].

Conclusion

Established IFNβ-1a therapy was not associated with ongoing spinal cord atrophy or any difference in the rate of spinal cord volume change in RRMS compared to NC over 2 years. These results may reflect a treatment effect. However, due to sample size and study design, these results should be considered preliminary and await confirmation.
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Metadata
Title
The effect of intramuscular interferon beta-1a on spinal cord volume in relapsing-remitting multiple sclerosis
Authors
Sheena L. Dupuy
Fariha Khalid
Brian C. Healy
Sonya Bakshi
Mohit Neema
Shahamat Tauhid
Rohit Bakshi
Publication date
01-12-2016
Publisher
BioMed Central
Published in
BMC Medical Imaging / Issue 1/2016
Electronic ISSN: 1471-2342
DOI
https://doi.org/10.1186/s12880-016-0158-4

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