T-lymphocyte subsets modifications in multiple sclerosis: correlation with clinical disease activity.

Serial analyses of peripheral blood T-lymphocyte subsets were performed in 280 samples collected over a 27 months period from 14 multiple sclerosis patients. A significant decrease of T8+ cells was found in 47.1% (47/87) of blood samples collected within four weeks of onset of a relapse opposed to 2.1% (1/47) of samples collected during the four weeks before a relapse and to 3.4% (5/146) of those collected over four weeks after a relapse. Changes of T-cells subsets appear to correlate with disease activity, but normal findings observed before relapses suggest that the decrease of T8+ cells cannot be used as valid predictor of relapse.