Abstract
Objectives: To investigate the influence of interferon-β-1b (INF-β-1b) therapy on blood antioxidants (α-tocopherol and NADPH) in multiple sclerosis (MS). Patients and Methods: Patients with relapsing-remitting MS (n = 14) have been studied during 6 months of INF-β-1b therapy. α-Tocopherol was determined by HPLC and UV or electrochemical detection; NADPH was quantified spectrophotometrically. Results: The erythrocyte α-tocopherol level was reduced (p < 0.001) before treatment, but had regained the control level by 6 months of therapy. The plasma α-tocopherol/lipid ratios were constant during therapy. Plasma triglyceride levels were transiently increased (p = 0.0270) after 1 month of treatment. INF-β-1b had also induced a transient decrease in NADPH after 1 month, but thereafter the level returned to approximately the initial value (p = 0.0248). Conclusion: INF-β-1b seems to exert a sparing effect toward the erythrocyte α-tocopherol content. The fall in NADPH in parallel to the rise in plasma triglycerides suggests stimulation of fatty acid synthesis by INF-β-1b.
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