Azathioprine and steroids are not more effective in decreasing multiple sclerosis intra–blood‐brain‐barrier IgG synthesis than steroids alone

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Abstract
Intra–blood‐brain‐barrier IgG synthesis rates and oligoclonal IgG banding patterns were examined in 9 patients with multiple sclerosis who were treated with azathioprine and steroids for 2 to 4.5 years. The IgG synthesis rates of 5 patients were significantly decreased from the pretreatment mean values 1 month after treatment, and their synthesis rates remained at the decreased levels throughout treatment. However, among the remaining 4 patients, the rates exceeded the pretreatment means. This continuous suppressive effect of the combined azathioprine and steroids upon the IgG synthesis rate was similar to that of steroids, suggesting that azathioprine and steroids in combination were not more effective in reducing intra–blood‐brain‐barrier IgG synthesis than steroids alone. Oligoclonal IgG patterns in all cerebrospinal fluid samples were not significantly altered during the study.