Document 0285 DOCN M9550285 TI Parkinson's disease and immunological abnormalities: increase of HLA-DR expression on monocytes in cerebrospinal fluid and of CD45RO+ T cells in peripheral blood. DT 9505 AU Fiszer U; Mix E; Fredrikson S; Kostulas V; Link H; Institute of Psychiatry and Neurology, Warsaw, Poland. SO Acta Neurol Scand. 1994 Sep;90(3):160-6. Unique Identifier : AIDSLINE MED/95149672 AB The etiology of Parkinson's disease is mainly unknown. Immune abnormalities have been described, but the cause of such abnormalities has not been resolved. We examined by two-colour flow cytometry HLA-DR antigen expression on monocytes from cerebrospinal fluid (CSF) and blood and, moreover, lymphocyte subpopulations (CD4+ CD45RO+, CD4+ CD45RA+, CD8+ CD11b+high) in peripheral blood from patients with Parkinson's disease compared with age-matched patients with other neurological diseases (OND) and tension headache. We found higher HLA-DR expression on CSF monocytes compared with blood monocytes. This difference was restricted to Parkinson's disease patients. T helper cell analysis revealed a decreased percentage of CD45RA+ naive and an increased percentage of CD45RO+ memory T cell subset from CD4+ T cells in peripheral blood of patients with Parkinson's disease compared with patients with tension headache. The proportions of CD8+ CD11b+high suppressor T cells remained unchanged, among the three patient groups compared. A selective loss of CD4+ CD45RA+ cells, previously observed in diseases like multiple sclerosis and Down's syndrome as compared with healthy controls suggests a common immunological abnormality in neurological disorders. DE Adult Aged Aged, 80 and over Antigens, CD45/*BLOOD CD4-Positive T-Lymphocytes/IMMUNOLOGY CD8-Positive T-Lymphocytes/IMMUNOLOGY Female Flow Cytometry Headache/DIAGNOSIS/IMMUNOLOGY Human HLA-DR Antigens/*CEREBROSPINAL FLUID Leukocyte Count Macrophage-1 Antigen/BLOOD Male Middle Age Monocytes/*IMMUNOLOGY Nervous System Diseases/DIAGNOSIS/IMMUNOLOGY Parkinson Disease/DIAGNOSIS/*IMMUNOLOGY Sex Factors Support, Non-U.S. Gov't T-Lymphocyte Subsets/*IMMUNOLOGY JOURNAL ARTICLE SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).