25 Hydroxyvitamin D and Cytokines in Multiple Sclerosis

Area of Science:

• Neuroimmunology
• Endocrinology

Background:

• Multiple Sclerosis (MS) pathogenesis involves complex immune dysregulation.
• Inconsistent findings exist regarding cytokine profiles during MS relapse and remission.
• Vitamin D deficiency is linked to MS risk and progression.

Purpose of the Study:

• To assess serum concentrations of 25(OH)D, IL-17, IFN-gamma, TGF-β1, IL-4, and IL-10 during MS relapse and remission.
• To correlate these levels with neurological disability severity (EDSS).

Main Methods:

• Study included 23 relapsing-remitting MS patients and 30 healthy controls.
• Serum samples collected during winter, with patients sampled during relapse and remission.
• Measurements included 25(OH)D (ELISA) and various cytokines (ELISA).

Main Results:

• Average 25(OH)D levels were near insufficiency, lowest during relapse.
• A reverse correlation was observed between 25(OH)D levels and disability in both relapse and remission.
• TGF-β1 increased significantly in remission; IL-4 was lower during relapse.
• IL-17 and IFN-gamma tended to decrease during improvement, with IFN-gamma lower than controls overall.

Conclusions:

• Persistent cytokine imbalance suggests a marker for Th1-mediated CNS demyelination in MS.
• TGF-β1 and IL-4 indicate immune response intensity.
• Disability severity correlates with 25(OH)D levels, not directly with tested cytokine changes.