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Old 06-11-2018, 03:36 PM
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Default STUDY: Exercise-induced changes in MS moderated by weight status

Exercise-induced changes in neurotrophic factors and markers of blood-brain barrier permeability are moderated by weight status in multiple sclerosis

Motahare Mokhtarzadea, Robert Motlb, Raoof Negaresha, Philipp Zimmerc, d, Mostafa Khodadooste, Julien S. Bakerf, Darpan Patelg, Nastaran Majdinasabh, i, Rouholah Ranjbarj
https://doi.org/10.1016/j.npep.2018.05.010

Highlights
•Eight-week exercise training improved blood-brain permeability markers in multiple sclerosis.
•Eight-week exercise training enhanced neurotrophic levels in multiple sclerosis.
•Bodyweight moderated effect of exercise training in multiple sclerosis.
•Overweight persons with multiple sclerosis are more resistant to the beneficial effects of exercise.

Abstract

Blood-brain barrier (BBB) and neurotrophic factors seemingly have an important role in multiple sclerosis pathology. Physical activity may influence blood-brain barrier function and levels of neurotrophic factors, and such effects might be moderated by body weight status. This study investigated the effect of exercise training on markers of blood-brain barrier permeability and neurotrophic factors as a function of weight status in multiple sclerosis patients.

Sixty three persons with relapsing remitting multiple sclerosis who were normal weight (n: 33) or overweight (n: 33) were randomly assigned into groups of exercise (normal weight training, n: 18; overweight training group, n: 18) or no exercise (normal weight control, n: 15; overweight control group, n: 15). The intervention consisted of 8 weeks (3 days per week) of cycling undertaken at 60–70% peak power. Resting blood concentrations of s100 calcium-binding protein B (s100b) and neuron-specific enolase as BBB permeability markers, neurotrophic factors and cytokines (Interleukin-10 and tumor necrosis factor alpha) were evaluated before and after the intervention.

There were significant weight, training, and interaction effects on brain-derived neurotrophic factor and platelet-derived growth factor; however, ciliary neurotrophic factor and nerve growth factor did not demonstrate any effect. Brain-derived neurotrophic factor and platelet-derived growth factor were significantly increased from pre-post in normal weight exercise. Significant weight, training, and interaction effects were found for s100b. In detail, s100b was significantly increased from pre-post in normal weight exercise. In contrast, neuron-specific enolase and cytokines did not demonstrate any effect.

Generally, Exercise training may alter markers of BBB permeability and neurotrophic factor status in normal weight persons with multiple sclerosis; however, overweight participants may be more resistant to these effects of exercise.

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