Increased activated human T cell lymphotropic virus type I (HTLV-I) Tax11-19-specific memory and effector CD8+ cells in patients with HTLV-I-associated myelopathy/tropical spastic paraparesis: correlation with HTLV-I provirus load.
J Infect Dis
; 183(2): 197-205, 2001 Jan 15.
Article
em En
| MEDLINE
| ID: mdl-11120926
ABSTRACT
To discern the T cell subtype associated with T cell differentiation, the expression of CD45RA and CD27 was measured from total CD8(high) cells and from human T cell lymphotropic virus type I (HTLV-I) Tax11-19 peptide-specific CD8(+) cells in peripheral blood lymphocytes of patients with HTLV-I-associated myelopathy/tropical spastic paraparesis (HAM/TSP). Phenotypically defined memory and/or effector cells (CD45RA(-)CD27(+), CD45RA(+)CD27(-), and CD45RA(-)CD27(-)) were increased in HAM/TSP CD8(+) cells, compared with those of HTLV-I-seronegative healthy control subjects. The percentage of human leukocyte antigen (HLA)-DR-positive cells was also increased in CD8(+) cells of HAM/TSP, compared with those in HLA-DR(+)CD8(+) cells of healthy control subjects. HTLV-I provirus load correlated with the frequency of Tax11-19-specific CD8(+) cells. The high frequency of memory and/or effector type HTLV-I Tax11-19-specific CD8(+) cells suggests that continuous restimulation driven by HTLV-I antigens in vivo may be associated with the pathogenesis of HAM/TSP.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Vírus Linfotrópico T Tipo 1 Humano
/
Paraparesia Espástica Tropical
/
Produtos do Gene tax
/
Linfócitos T CD8-Positivos
/
Memória Imunológica
Tipo de estudo:
Risk_factors_studies
Limite:
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
J Infect Dis
Ano de publicação:
2001
Tipo de documento:
Article
País de afiliação:
Estados Unidos