Characterization of adherent T cells to human endothelial cells in patients with HTLV-I-associated myelopathy
Identifieur interne : 001929 ( Istex/Curation ); précédent : 001928; suivant : 001930Characterization of adherent T cells to human endothelial cells in patients with HTLV-I-associated myelopathy
Auteurs : Katsuhiro Ichinose [Japon] ; Tatsufumi Nakamura [Japon] ; Yoshihiro Nishiura [Japon] ; Kunihiko Nagasato [Japon] ; Kiyosumi Ohishi [Japon] ; Hiroko Watanabe [Japon] ; Akira Fujita [Japon] ; Ken-Ichi Kurouji [Japon] ; Mitsuhiro Tsujihata [Japon] ; Shigenobu Nagataki [Japon]Source :
- Journal of the Neurological Sciences [ 0022-510X ] ; 1993.
Abstract
To clarify the phenomenon of increased adherence of T cells to endothelial cells (EC) in patients with HTLV-I-associated myelopathy (HAM), we determined the surface markers and expression of lymphocyte function antigen-1 (LFA-1) in T cells adherent or nonadherent to EC. The percentage of activated or HLA-DR+ T cells and the expression of LFA-1 in the adherent cell population were significantly higher than those in the nonadherent cell population. Moreover, the CD4 to CD8 ratio of the HLA-DR+ cells in the EC-adherent T cells was significantly higher than that in the nonadherent cells. Collectively, these results indicate that increased adherence of T cells to EC in HAM patients is based on the increase of activated T cells with high density LFA-1 expression in the peripheral blood. Moreover, CD4+ HLA-DR+ cells exhibited more adhesive activity to EC than CD8+ HLA-DR+ cells, suggesting that activated CD4+ cells, rather than activated CD8+ cells, may be important as the first trigger for T cell-infiltration to the central nervous system in the immunopathogenesis of HAM.
Url:
DOI: 10.1016/0022-510X(94)90299-2
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Shigenobu Nagataki<affiliation><mods:affiliation>Corresponding author. Tel.: 81-958-47-2111, ext. 2800; Fax: 81-958-43-0255.</mods:affiliation>
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<affiliation wicri:level="1"><mods:affiliation>First Department of Internal Medicine, Nagasaki University School of Medicine, 1-7-1 Sakamoto, Nagasaki 852, Japan</mods:affiliation>
<country xml:lang="fr">Japon</country>
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<front><div type="abstract" xml:lang="en">To clarify the phenomenon of increased adherence of T cells to endothelial cells (EC) in patients with HTLV-I-associated myelopathy (HAM), we determined the surface markers and expression of lymphocyte function antigen-1 (LFA-1) in T cells adherent or nonadherent to EC. The percentage of activated or HLA-DR+ T cells and the expression of LFA-1 in the adherent cell population were significantly higher than those in the nonadherent cell population. Moreover, the CD4 to CD8 ratio of the HLA-DR+ cells in the EC-adherent T cells was significantly higher than that in the nonadherent cells. Collectively, these results indicate that increased adherence of T cells to EC in HAM patients is based on the increase of activated T cells with high density LFA-1 expression in the peripheral blood. Moreover, CD4+ HLA-DR+ cells exhibited more adhesive activity to EC than CD8+ HLA-DR+ cells, suggesting that activated CD4+ cells, rather than activated CD8+ cells, may be important as the first trigger for T cell-infiltration to the central nervous system in the immunopathogenesis of HAM.</div>
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