title: Increases in helper inducer T cells and activated T cells in HTLV-I-associated myelopathy.
abstract: Using two-color flow cytometric analysis, we studied peripheral blood lymphocyte subsets in 15 patients with human T-cell lymphotropic virus type I-associated myelopathy. The percentage of CD4+ 4B4+ cells (helper inducer T cell) was significantly increased in the patients with the myelopathy, compared with 16 healthy control subjects who were seronegative for human T-cell lymphotropic virus type I. However, there was no difference in the percentage of CD4+ 2H4+ cells (suppressor inducer T cell) between the two groups. The ratio of CD4+ 4B4+ cells to CD4+ cells and CD4+ 4B4+ to CD4+ 2H4+ cells was also elevated in these patients. The percentage of CD4+ DR+ cells and CD8+ DR+ cells, both of which are phenotypically activated T cells, and the ratio of CD4+ DR+ cells to CD4+ cells and of CD8+ DR+ cells to CD8+ cells are also increased in the patients, compared with the control subjects. The percentage of CD4+ 4B4+ cells showed positive correlations with values of spontaneous proliferation of peripheral blood lymphocytes and serum IgG level in patients with the myelopathy.
authors.affiliation: Department of Neurology, Kyushu University, Fukuoka, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Itoyama
authors.forename: J
authors.initials: J
authors.lastname: Kira
authors.forename: N
authors.initials: N
authors.lastname: Fujii
authors.forename: I
authors.initials: I
authors.lastname: Goto
authors.forename: N
authors.initials: N
authors.lastname: Yamamoto
mesh_terms: D000328:Adult; D000945:Antigens, Differentiation, T-Lymphocyte / Q000378:metabolism; D005260:Female; D005434:Flow Cytometry; D015490:HTLV-I Infections / Q000150:complications / Q000276:immunology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009135:Muscular Diseases / Q000209:etiology / Q000276:immunology*; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology*
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte