Journal
JOURNAL OF NEUROIMMUNOLOGY
Volume 113, Issue 1, Pages 146-152Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0165-5728(00)00422-7
Keywords
Parkinson's disease; lymphocytes; dopamine; rat; human; activation
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To assess the involvement of the immune system in Parkinson's disease we studied the phenotype of circulating lymphocytes in 30 untreated and 34 treated patients. We found a numeric decrease in helper T cells (higher in CD4(+)CD45RA(-) than in CD4(+)CD29(+)) and B cells, and a rise in activated, CD4(+)CD25(+) lymphocytes that was correlated with lymphocyte depletion. All these alterations were independent of levodopa treatment. In addition, we performed striatal dopamine depletion in rats with either MPP+ or 6-OHDA, showing that MPP+ but not 6-OHDA can increase CD4(+)CD25(+) lymphocytes. Thus, mechanisms other than dopamine deficit may explain the immune activation in Parkinson's disease. (C) 2001 Elsevier Science B.V. All rights reserved.
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