Abstract
Lymphocytes subpopulations in cerebro-spinal fluid (CSF) and peripheral blood (PB) from multiple sclerosis (MS) patients were studied. PB of MS patients contains the same prevalence of E and EA rosette forming cells compared with controls, consisting of patients affected by various "nonimmunological" neuropsychiatric diseases. Cytochemical identification by the method of acid esterases in PB demonstrated in MS a prevalence of lymphocyte subpopulations similar to controls, and a relatively high percentage of macrophages compared with other methods, especially in MS patients: this may partially account for variable results obtained by various authors with the rosette technique. In CSF a significant decrease of total T, and particularly of T gamma cells, was found. Since T gamma lymphocytes have a suppressor effect on B cell proliferation and Ig synthesis, their decrease could be related with Ig hypersynthesis commonly found in the central nervous system of MS patients.
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