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  • Title: Lymphocyte phenotype and subset distribution in normal cerebrospinal fluid.
    Author: Svenningsson A, Andersen O, Edsbagge M, Stemme S.
    Journal: J Neuroimmunol; 1995 Dec; 63(1):39-46. PubMed ID: 8557823.
    Abstract:
    The distribution of lymphocyte subpopulations in cerebrospinal fluid (CSF) and their phenotypic characteristics were extensively investigated in a group of 18 healthy individuals using two- and three-color flow cytometry. Generally, CD3+ T lymphocytes constituted the vast majority of CSF lymphocytes while the number of B lymphocytes and NK cells were low. Most T lymphocytes exhibited the phenotype of memory/primed cells in both the CD4+ and CD8+ subpopulations. Two markers for recent activation, HLA-DR and interleukin-2 receptor (CD25) were not upregulated when compared with peripheral blood (PB) in the majority of CSF T lymphocytes. However, a fraction of T lymphocytes co-expressing the NK cells markers CD56 and/or CD16 showed a pronounced upregulation of HLA-DR in CSF as compared with PB. This study documents that the cellular composition of the normal CSF differs profoundly from PB regarding all major lymphocyte subpopulations. This has to be taken into account in studies addressing questions regarding cellular immune reactions in the central nervous system under pathological conditions.
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